[457] | 1 | /* rsa.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2020 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL.
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| 6 | *
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| 7 | * wolfSSL is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * wolfSSL is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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| 20 | */
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| 21 |
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| 22 |
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| 23 | #ifdef HAVE_CONFIG_H
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| 24 | #include <config.h>
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| 25 | #endif
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| 26 |
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| 27 | #include <wolfssl/wolfcrypt/settings.h>
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| 28 | #include <wolfssl/wolfcrypt/error-crypt.h>
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| 29 |
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| 30 | #ifndef NO_RSA
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| 31 |
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| 32 | #if defined(HAVE_FIPS) && \
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| 33 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
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| 34 |
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| 35 | /* set NO_WRAPPERS before headers, use direct internal f()s not wrappers */
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| 36 | #define FIPS_NO_WRAPPERS
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| 37 |
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| 38 | #ifdef USE_WINDOWS_API
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| 39 | #pragma code_seg(".fipsA$e")
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| 40 | #pragma const_seg(".fipsB$e")
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| 41 | #endif
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| 42 | #endif
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| 43 |
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| 44 | #include <wolfssl/wolfcrypt/rsa.h>
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| 45 |
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| 46 | #ifdef WOLFSSL_AFALG_XILINX_RSA
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| 47 | #include <wolfssl/wolfcrypt/port/af_alg/wc_afalg.h>
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| 48 | #endif
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| 49 |
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| 50 | #ifdef WOLFSSL_HAVE_SP_RSA
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| 51 | #include <wolfssl/wolfcrypt/sp.h>
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| 52 | #endif
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| 53 |
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| 54 | /*
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| 55 | Possible RSA enable options:
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| 56 | * NO_RSA: Overall control of RSA default: on (not defined)
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| 57 | * WC_RSA_BLINDING: Uses Blinding w/ Private Ops default: off
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| 58 | Note: slower by ~20%
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| 59 | * WOLFSSL_KEY_GEN: Allows Private Key Generation default: off
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| 60 | * RSA_LOW_MEM: NON CRT Private Operations, less memory default: off
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| 61 | * WC_NO_RSA_OAEP: Disables RSA OAEP padding default: on (not defined)
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| 62 | * WC_RSA_NONBLOCK: Enables support for RSA non-blocking default: off
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| 63 | * WC_RSA_NONBLOCK_TIME:Enables support for time based blocking default: off
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| 64 | * time calculation.
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| 65 | */
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| 66 |
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| 67 | /*
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| 68 | RSA Key Size Configuration:
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| 69 | * FP_MAX_BITS: With USE_FAST_MATH only default: 4096
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| 70 | If USE_FAST_MATH then use this to override default.
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| 71 | Value is key size * 2. Example: RSA 3072 = 6144
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| 72 | */
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| 73 |
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| 74 |
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| 75 | /* If building for old FIPS. */
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| 76 | #if defined(HAVE_FIPS) && \
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| 77 | (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
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| 78 |
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| 79 | int wc_InitRsaKey(RsaKey* key, void* ptr)
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| 80 | {
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| 81 | if (key == NULL) {
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| 82 | return BAD_FUNC_ARG;
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| 83 | }
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| 84 |
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| 85 | return InitRsaKey_fips(key, ptr);
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| 86 | }
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| 87 |
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| 88 |
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| 89 | int wc_InitRsaKey_ex(RsaKey* key, void* ptr, int devId)
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| 90 | {
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| 91 | (void)devId;
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| 92 | if (key == NULL) {
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| 93 | return BAD_FUNC_ARG;
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| 94 | }
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| 95 | return InitRsaKey_fips(key, ptr);
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| 96 | }
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| 97 |
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| 98 |
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| 99 | int wc_FreeRsaKey(RsaKey* key)
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| 100 | {
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| 101 | return FreeRsaKey_fips(key);
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| 102 | }
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| 103 |
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| 104 |
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| 105 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
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| 106 | int wc_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out,
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| 107 | word32 outLen, RsaKey* key, WC_RNG* rng)
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| 108 | {
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| 109 | if (in == NULL || out == NULL || key == NULL || rng == NULL) {
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| 110 | return BAD_FUNC_ARG;
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| 111 | }
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| 112 | return RsaPublicEncrypt_fips(in, inLen, out, outLen, key, rng);
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| 113 | }
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| 114 | #endif
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| 115 |
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| 116 |
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| 117 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
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| 118 | int wc_RsaPrivateDecryptInline(byte* in, word32 inLen, byte** out,
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| 119 | RsaKey* key)
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| 120 | {
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| 121 | if (in == NULL || out == NULL || key == NULL) {
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| 122 | return BAD_FUNC_ARG;
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| 123 | }
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| 124 | return RsaPrivateDecryptInline_fips(in, inLen, out, key);
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| 125 | }
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| 126 |
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| 127 |
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| 128 | int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out,
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| 129 | word32 outLen, RsaKey* key)
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| 130 | {
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| 131 | if (in == NULL || out == NULL || key == NULL) {
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| 132 | return BAD_FUNC_ARG;
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| 133 | }
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| 134 | return RsaPrivateDecrypt_fips(in, inLen, out, outLen, key);
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| 135 | }
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| 136 |
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| 137 |
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| 138 | int wc_RsaSSL_Sign(const byte* in, word32 inLen, byte* out,
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| 139 | word32 outLen, RsaKey* key, WC_RNG* rng)
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| 140 | {
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| 141 | if (in == NULL || out == NULL || key == NULL || inLen == 0) {
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| 142 | return BAD_FUNC_ARG;
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| 143 | }
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| 144 | return RsaSSL_Sign_fips(in, inLen, out, outLen, key, rng);
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| 145 | }
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| 146 | #endif
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| 147 |
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| 148 |
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| 149 | int wc_RsaSSL_VerifyInline(byte* in, word32 inLen, byte** out, RsaKey* key)
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| 150 | {
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| 151 | if (in == NULL || out == NULL || key == NULL) {
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| 152 | return BAD_FUNC_ARG;
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| 153 | }
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| 154 | return RsaSSL_VerifyInline_fips(in, inLen, out, key);
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| 155 | }
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| 156 |
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| 157 |
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| 158 | int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out,
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| 159 | word32 outLen, RsaKey* key)
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| 160 | {
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| 161 | if (in == NULL || out == NULL || key == NULL || inLen == 0) {
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| 162 | return BAD_FUNC_ARG;
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| 163 | }
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| 164 | return RsaSSL_Verify_fips(in, inLen, out, outLen, key);
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| 165 | }
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| 166 |
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| 167 |
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| 168 | int wc_RsaEncryptSize(RsaKey* key)
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| 169 | {
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| 170 | if (key == NULL) {
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| 171 | return BAD_FUNC_ARG;
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| 172 | }
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| 173 | return RsaEncryptSize_fips(key);
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| 174 | }
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| 175 |
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| 176 |
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| 177 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
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| 178 | int wc_RsaFlattenPublicKey(RsaKey* key, byte* a, word32* aSz, byte* b,
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| 179 | word32* bSz)
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| 180 | {
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| 181 |
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| 182 | /* not specified as fips so not needing _fips */
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| 183 | return RsaFlattenPublicKey(key, a, aSz, b, bSz);
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| 184 | }
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| 185 | #endif
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| 186 |
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| 187 |
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| 188 | #ifdef WOLFSSL_KEY_GEN
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| 189 | int wc_MakeRsaKey(RsaKey* key, int size, long e, WC_RNG* rng)
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| 190 | {
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| 191 | return MakeRsaKey(key, size, e, rng);
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| 192 | }
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| 193 | #endif
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| 194 |
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| 195 |
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| 196 | /* these are functions in asn and are routed to wolfssl/wolfcrypt/asn.c
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| 197 | * wc_RsaPrivateKeyDecode
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| 198 | * wc_RsaPublicKeyDecode
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| 199 | */
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| 200 |
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| 201 | #else /* else build without fips, or for new fips */
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| 202 |
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| 203 | #include <wolfssl/wolfcrypt/random.h>
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| 204 | #include <wolfssl/wolfcrypt/logging.h>
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| 205 | #ifdef WOLF_CRYPTO_CB
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| 206 | #include <wolfssl/wolfcrypt/cryptocb.h>
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| 207 | #endif
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| 208 | #ifdef NO_INLINE
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| 209 | #include <wolfssl/wolfcrypt/misc.h>
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| 210 | #else
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| 211 | #define WOLFSSL_MISC_INCLUDED
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| 212 | #include <wolfcrypt/src/misc.c>
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| 213 | #endif
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| 214 |
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| 215 |
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| 216 | enum {
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| 217 | RSA_STATE_NONE = 0,
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| 218 |
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| 219 | RSA_STATE_ENCRYPT_PAD,
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| 220 | RSA_STATE_ENCRYPT_EXPTMOD,
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| 221 | RSA_STATE_ENCRYPT_RES,
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| 222 |
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| 223 | RSA_STATE_DECRYPT_EXPTMOD,
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| 224 | RSA_STATE_DECRYPT_UNPAD,
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| 225 | RSA_STATE_DECRYPT_RES,
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| 226 | };
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| 227 |
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| 228 |
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| 229 | static void wc_RsaCleanup(RsaKey* key)
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| 230 | {
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| 231 | #ifndef WOLFSSL_RSA_VERIFY_INLINE
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| 232 | if (key && key->data) {
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| 233 | /* make sure any allocated memory is free'd */
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| 234 | if (key->dataIsAlloc) {
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| 235 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
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| 236 | if (key->type == RSA_PRIVATE_DECRYPT ||
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| 237 | key->type == RSA_PRIVATE_ENCRYPT) {
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| 238 | ForceZero(key->data, key->dataLen);
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| 239 | }
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| 240 | #endif
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| 241 | XFREE(key->data, key->heap, DYNAMIC_TYPE_WOLF_BIGINT);
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| 242 | key->dataIsAlloc = 0;
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| 243 | }
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| 244 | key->data = NULL;
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| 245 | key->dataLen = 0;
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| 246 | }
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| 247 | #else
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| 248 | (void)key;
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| 249 | #endif
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| 250 | }
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| 251 |
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| 252 | int wc_InitRsaKey_ex(RsaKey* key, void* heap, int devId)
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| 253 | {
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| 254 | int ret = 0;
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| 255 |
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| 256 | if (key == NULL) {
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| 257 | return BAD_FUNC_ARG;
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| 258 | }
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| 259 |
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| 260 | XMEMSET(key, 0, sizeof(RsaKey));
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| 261 |
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| 262 | key->type = RSA_TYPE_UNKNOWN;
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| 263 | key->state = RSA_STATE_NONE;
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| 264 | key->heap = heap;
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| 265 | #ifndef WOLFSSL_RSA_VERIFY_INLINE
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| 266 | key->dataIsAlloc = 0;
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| 267 | key->data = NULL;
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| 268 | #endif
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| 269 | key->dataLen = 0;
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| 270 | #ifdef WC_RSA_BLINDING
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| 271 | key->rng = NULL;
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| 272 | #endif
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| 273 |
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| 274 | #ifdef WOLF_CRYPTO_CB
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| 275 | key->devId = devId;
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| 276 | #else
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| 277 | (void)devId;
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| 278 | #endif
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| 279 |
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| 280 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 281 | #ifdef WOLFSSL_CERT_GEN
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| 282 | XMEMSET(&key->certSignCtx, 0, sizeof(CertSignCtx));
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| 283 | #endif
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| 284 |
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| 285 | #ifdef WC_ASYNC_ENABLE_RSA
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| 286 | /* handle as async */
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| 287 | ret = wolfAsync_DevCtxInit(&key->asyncDev, WOLFSSL_ASYNC_MARKER_RSA,
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| 288 | key->heap, devId);
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| 289 | if (ret != 0)
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| 290 | return ret;
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| 291 | #endif /* WC_ASYNC_ENABLE_RSA */
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| 292 | #endif /* WOLFSSL_ASYNC_CRYPT */
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| 293 |
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| 294 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
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| 295 | ret = mp_init_multi(&key->n, &key->e, NULL, NULL, NULL, NULL);
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| 296 | if (ret != MP_OKAY)
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| 297 | return ret;
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| 298 |
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| 299 | #if !defined(WOLFSSL_KEY_GEN) && !defined(OPENSSL_EXTRA) && defined(RSA_LOW_MEM)
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| 300 | ret = mp_init_multi(&key->d, &key->p, &key->q, NULL, NULL, NULL);
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| 301 | #else
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| 302 | ret = mp_init_multi(&key->d, &key->p, &key->q, &key->dP, &key->dQ, &key->u);
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| 303 | #endif
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| 304 | if (ret != MP_OKAY) {
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| 305 | mp_clear(&key->n);
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| 306 | mp_clear(&key->e);
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| 307 | return ret;
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| 308 | }
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| 309 | #else
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| 310 | ret = mp_init(&key->n);
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| 311 | if (ret != MP_OKAY)
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| 312 | return ret;
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| 313 | ret = mp_init(&key->e);
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| 314 | if (ret != MP_OKAY) {
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| 315 | mp_clear(&key->n);
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| 316 | return ret;
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| 317 | }
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| 318 | #endif
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| 319 |
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| 320 | #ifdef WOLFSSL_XILINX_CRYPT
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| 321 | key->pubExp = 0;
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| 322 | key->mod = NULL;
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| 323 | #endif
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| 324 |
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| 325 | #ifdef WOLFSSL_AFALG_XILINX_RSA
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| 326 | key->alFd = WC_SOCK_NOTSET;
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| 327 | key->rdFd = WC_SOCK_NOTSET;
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| 328 | #endif
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| 329 |
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| 330 | return ret;
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| 331 | }
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| 332 |
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| 333 | int wc_InitRsaKey(RsaKey* key, void* heap)
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| 334 | {
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| 335 | return wc_InitRsaKey_ex(key, heap, INVALID_DEVID);
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| 336 | }
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| 337 |
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| 338 | #ifdef HAVE_PKCS11
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| 339 | int wc_InitRsaKey_Id(RsaKey* key, unsigned char* id, int len, void* heap,
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| 340 | int devId)
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| 341 | {
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| 342 | int ret = 0;
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| 343 |
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| 344 | if (key == NULL)
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| 345 | ret = BAD_FUNC_ARG;
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| 346 | if (ret == 0 && (len < 0 || len > RSA_MAX_ID_LEN))
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| 347 | ret = BUFFER_E;
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| 348 |
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| 349 | if (ret == 0)
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| 350 | ret = wc_InitRsaKey_ex(key, heap, devId);
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| 351 |
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| 352 | if (ret == 0 && id != NULL && len != 0) {
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| 353 | XMEMCPY(key->id, id, len);
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| 354 | key->idLen = len;
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| 355 | }
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| 356 |
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| 357 | return ret;
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| 358 | }
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| 359 | #endif
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| 360 |
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| 361 |
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| 362 | #ifdef WOLFSSL_XILINX_CRYPT
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| 363 | #define MAX_E_SIZE 4
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| 364 | /* Used to setup hardware state
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| 365 | *
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| 366 | * key the RSA key to setup
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| 367 | *
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| 368 | * returns 0 on success
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| 369 | */
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| 370 | int wc_InitRsaHw(RsaKey* key)
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| 371 | {
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| 372 | unsigned char* m; /* RSA modulous */
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| 373 | word32 e = 0; /* RSA public exponent */
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| 374 | int mSz;
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| 375 | int eSz;
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| 376 |
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| 377 | if (key == NULL) {
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| 378 | return BAD_FUNC_ARG;
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| 379 | }
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| 380 |
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| 381 | mSz = mp_unsigned_bin_size(&(key->n));
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| 382 | m = (unsigned char*)XMALLOC(mSz, key->heap, DYNAMIC_TYPE_KEY);
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| 383 | if (m == 0) {
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| 384 | return MEMORY_E;
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| 385 | }
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| 386 |
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| 387 | if (mp_to_unsigned_bin(&(key->n), m) != MP_OKAY) {
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| 388 | WOLFSSL_MSG("Unable to get RSA key modulus");
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| 389 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 390 | return MP_READ_E;
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| 391 | }
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| 392 |
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| 393 | eSz = mp_unsigned_bin_size(&(key->e));
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| 394 | if (eSz > MAX_E_SIZE) {
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| 395 | WOLFSSL_MSG("Exponent of size 4 bytes expected");
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| 396 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 397 | return BAD_FUNC_ARG;
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| 398 | }
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| 399 |
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| 400 | if (mp_to_unsigned_bin(&(key->e), (byte*)&e + (MAX_E_SIZE - eSz))
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| 401 | != MP_OKAY) {
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| 402 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 403 | WOLFSSL_MSG("Unable to get RSA key exponent");
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| 404 | return MP_READ_E;
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| 405 | }
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| 406 |
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| 407 | /* check for existing mod buffer to avoid memory leak */
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| 408 | if (key->mod != NULL) {
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| 409 | XFREE(key->mod, key->heap, DYNAMIC_TYPE_KEY);
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| 410 | }
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| 411 |
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| 412 | key->pubExp = e;
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| 413 | key->mod = m;
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| 414 |
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| 415 | if (XSecure_RsaInitialize(&(key->xRsa), key->mod, NULL,
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| 416 | (byte*)&(key->pubExp)) != XST_SUCCESS) {
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| 417 | WOLFSSL_MSG("Unable to initialize RSA on hardware");
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| 418 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 419 | return BAD_STATE_E;
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| 420 | }
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| 421 |
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| 422 | #ifdef WOLFSSL_XILINX_PATCH
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| 423 | /* currently a patch of xsecure_rsa.c for 2048 bit keys */
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| 424 | if (wc_RsaEncryptSize(key) == 256) {
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| 425 | if (XSecure_RsaSetSize(&(key->xRsa), 2048) != XST_SUCCESS) {
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| 426 | WOLFSSL_MSG("Unable to set RSA key size on hardware");
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| 427 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 428 | return BAD_STATE_E;
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| 429 | }
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| 430 | }
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| 431 | #endif
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| 432 | return 0;
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| 433 | } /* WOLFSSL_XILINX_CRYPT*/
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| 434 |
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| 435 | #elif defined(WOLFSSL_CRYPTOCELL)
|
---|
| 436 |
|
---|
| 437 | int wc_InitRsaHw(RsaKey* key)
|
---|
| 438 | {
|
---|
| 439 | CRYSError_t ret = 0;
|
---|
| 440 | byte e[3];
|
---|
| 441 | word32 eSz = sizeof(e);
|
---|
| 442 | byte n[256];
|
---|
| 443 | word32 nSz = sizeof(n);
|
---|
| 444 | byte d[256];
|
---|
| 445 | word32 dSz = sizeof(d);
|
---|
| 446 | byte p[128];
|
---|
| 447 | word32 pSz = sizeof(p);
|
---|
| 448 | byte q[128];
|
---|
| 449 | word32 qSz = sizeof(q);
|
---|
| 450 |
|
---|
| 451 | if (key == NULL) {
|
---|
| 452 | return BAD_FUNC_ARG;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | ret = wc_RsaExportKey(key, e, &eSz, n, &nSz, d, &dSz, p, &pSz, q, &qSz);
|
---|
| 456 | if (ret != 0)
|
---|
| 457 | return MP_READ_E;
|
---|
| 458 |
|
---|
| 459 | ret = CRYS_RSA_Build_PubKey(&key->ctx.pubKey, e, eSz, n, nSz);
|
---|
| 460 | if (ret != SA_SILIB_RET_OK){
|
---|
| 461 | WOLFSSL_MSG("CRYS_RSA_Build_PubKey failed");
|
---|
| 462 | return ret;
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | ret = CRYS_RSA_Build_PrivKey(&key->ctx.privKey, d, dSz, e, eSz, n, nSz);
|
---|
| 466 |
|
---|
| 467 | if (ret != SA_SILIB_RET_OK){
|
---|
| 468 | WOLFSSL_MSG("CRYS_RSA_Build_PrivKey failed");
|
---|
| 469 | return ret;
|
---|
| 470 | }
|
---|
| 471 | key->type = RSA_PRIVATE;
|
---|
| 472 | return 0;
|
---|
| 473 | }
|
---|
| 474 | static int cc310_RSA_GenerateKeyPair(RsaKey* key, int size, long e)
|
---|
| 475 | {
|
---|
| 476 | CRYSError_t ret = 0;
|
---|
| 477 | CRYS_RSAKGData_t KeyGenData;
|
---|
| 478 | CRYS_RSAKGFipsContext_t FipsCtx;
|
---|
| 479 | byte ex[3];
|
---|
| 480 | uint16_t eSz = sizeof(ex);
|
---|
| 481 | byte n[256];
|
---|
| 482 | uint16_t nSz = sizeof(n);
|
---|
| 483 |
|
---|
| 484 | ret = CRYS_RSA_KG_GenerateKeyPair(&wc_rndState,
|
---|
| 485 | wc_rndGenVectFunc,
|
---|
| 486 | (byte*)&e,
|
---|
| 487 | 3*sizeof(uint8_t),
|
---|
| 488 | size,
|
---|
| 489 | &key->ctx.privKey,
|
---|
| 490 | &key->ctx.pubKey,
|
---|
| 491 | &KeyGenData,
|
---|
| 492 | &FipsCtx);
|
---|
| 493 |
|
---|
| 494 | if (ret != SA_SILIB_RET_OK){
|
---|
| 495 | WOLFSSL_MSG("CRYS_RSA_KG_GenerateKeyPair failed");
|
---|
| 496 | return ret;
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | ret = CRYS_RSA_Get_PubKey(&key->ctx.pubKey, ex, &eSz, n, &nSz);
|
---|
| 500 | if (ret != SA_SILIB_RET_OK){
|
---|
| 501 | WOLFSSL_MSG("CRYS_RSA_Get_PubKey failed");
|
---|
| 502 | return ret;
|
---|
| 503 | }
|
---|
| 504 | ret = wc_RsaPublicKeyDecodeRaw(n, nSz, ex, eSz, key);
|
---|
| 505 |
|
---|
| 506 | key->type = RSA_PRIVATE;
|
---|
| 507 |
|
---|
| 508 | return ret;
|
---|
| 509 | }
|
---|
| 510 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
| 511 |
|
---|
| 512 | int wc_FreeRsaKey(RsaKey* key)
|
---|
| 513 | {
|
---|
| 514 | int ret = 0;
|
---|
| 515 |
|
---|
| 516 | if (key == NULL) {
|
---|
| 517 | return BAD_FUNC_ARG;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | wc_RsaCleanup(key);
|
---|
| 521 |
|
---|
| 522 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
| 523 | wolfAsync_DevCtxFree(&key->asyncDev, WOLFSSL_ASYNC_MARKER_RSA);
|
---|
| 524 | #endif
|
---|
| 525 |
|
---|
| 526 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 527 | if (key->type == RSA_PRIVATE) {
|
---|
| 528 | #if defined(WOLFSSL_KEY_GEN) || defined(OPENSSL_EXTRA) || !defined(RSA_LOW_MEM)
|
---|
| 529 | mp_forcezero(&key->u);
|
---|
| 530 | mp_forcezero(&key->dQ);
|
---|
| 531 | mp_forcezero(&key->dP);
|
---|
| 532 | #endif
|
---|
| 533 | mp_forcezero(&key->q);
|
---|
| 534 | mp_forcezero(&key->p);
|
---|
| 535 | mp_forcezero(&key->d);
|
---|
| 536 | }
|
---|
| 537 | /* private part */
|
---|
| 538 | #if defined(WOLFSSL_KEY_GEN) || defined(OPENSSL_EXTRA) || !defined(RSA_LOW_MEM)
|
---|
| 539 | mp_clear(&key->u);
|
---|
| 540 | mp_clear(&key->dQ);
|
---|
| 541 | mp_clear(&key->dP);
|
---|
| 542 | #endif
|
---|
| 543 | mp_clear(&key->q);
|
---|
| 544 | mp_clear(&key->p);
|
---|
| 545 | mp_clear(&key->d);
|
---|
| 546 | #endif /* WOLFSSL_RSA_PUBLIC_ONLY */
|
---|
| 547 |
|
---|
| 548 | /* public part */
|
---|
| 549 | mp_clear(&key->e);
|
---|
| 550 | mp_clear(&key->n);
|
---|
| 551 |
|
---|
| 552 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
| 553 | XFREE(key->mod, key->heap, DYNAMIC_TYPE_KEY);
|
---|
| 554 | key->mod = NULL;
|
---|
| 555 | #endif
|
---|
| 556 |
|
---|
| 557 | #ifdef WOLFSSL_AFALG_XILINX_RSA
|
---|
| 558 | /* make sure that sockets are closed on cleanup */
|
---|
| 559 | if (key->alFd > 0) {
|
---|
| 560 | close(key->alFd);
|
---|
| 561 | key->alFd = WC_SOCK_NOTSET;
|
---|
| 562 | }
|
---|
| 563 | if (key->rdFd > 0) {
|
---|
| 564 | close(key->rdFd);
|
---|
| 565 | key->rdFd = WC_SOCK_NOTSET;
|
---|
| 566 | }
|
---|
| 567 | #endif
|
---|
| 568 |
|
---|
| 569 | return ret;
|
---|
| 570 | }
|
---|
| 571 |
|
---|
| 572 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 573 | #if defined(WOLFSSL_KEY_GEN) && !defined(WOLFSSL_NO_RSA_KEY_CHECK)
|
---|
| 574 | /* Check the pair-wise consistency of the RSA key.
|
---|
| 575 | * From NIST SP 800-56B, section 6.4.1.1.
|
---|
| 576 | * Verify that k = (k^e)^d, for some k: 1 < k < n-1. */
|
---|
| 577 | int wc_CheckRsaKey(RsaKey* key)
|
---|
| 578 | {
|
---|
| 579 | #if defined(WOLFSSL_CRYPTOCELL)
|
---|
| 580 | return 0;
|
---|
| 581 | #endif
|
---|
| 582 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 583 | mp_int *k = NULL, *tmp = NULL;
|
---|
| 584 | #else
|
---|
| 585 | mp_int k[1], tmp[1];
|
---|
| 586 | #endif
|
---|
| 587 | int ret = 0;
|
---|
| 588 |
|
---|
| 589 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 590 | k = (mp_int*)XMALLOC(sizeof(mp_int) * 2, NULL, DYNAMIC_TYPE_RSA);
|
---|
| 591 | if (k == NULL)
|
---|
| 592 | return MEMORY_E;
|
---|
| 593 | tmp = k + 1;
|
---|
| 594 | #endif
|
---|
| 595 |
|
---|
| 596 | if (mp_init_multi(k, tmp, NULL, NULL, NULL, NULL) != MP_OKAY)
|
---|
| 597 | ret = MP_INIT_E;
|
---|
| 598 |
|
---|
| 599 | if (ret == 0) {
|
---|
| 600 | if (key == NULL)
|
---|
| 601 | ret = BAD_FUNC_ARG;
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | if (ret == 0) {
|
---|
| 605 | if (mp_set_int(k, 0x2342) != MP_OKAY)
|
---|
| 606 | ret = MP_READ_E;
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 | #ifdef WOLFSSL_HAVE_SP_RSA
|
---|
| 610 | #ifndef WOLFSSL_SP_NO_2048
|
---|
| 611 | if (mp_count_bits(&key->n) == 2048) {
|
---|
| 612 | ret = sp_ModExp_2048(k, &key->e, &key->n, tmp);
|
---|
| 613 | if (ret != 0)
|
---|
| 614 | ret = MP_EXPTMOD_E;
|
---|
| 615 | ret = sp_ModExp_2048(tmp, &key->d, &key->n, tmp);
|
---|
| 616 | if (ret != 0)
|
---|
| 617 | ret = MP_EXPTMOD_E;
|
---|
| 618 | }
|
---|
| 619 | else
|
---|
| 620 | #endif
|
---|
| 621 | #ifndef WOLFSSL_SP_NO_3072
|
---|
| 622 | if (mp_count_bits(&key->n) == 3072) {
|
---|
| 623 | ret = sp_ModExp_3072(k, &key->e, &key->n, tmp);
|
---|
| 624 | if (ret != 0)
|
---|
| 625 | ret = MP_EXPTMOD_E;
|
---|
| 626 | ret = sp_ModExp_3072(tmp, &key->d, &key->n, tmp);
|
---|
| 627 | if (ret != 0)
|
---|
| 628 | ret = MP_EXPTMOD_E;
|
---|
| 629 | }
|
---|
| 630 | else
|
---|
| 631 | #endif
|
---|
| 632 | #ifdef WOLFSSL_SP_4096
|
---|
| 633 | if (mp_count_bits(&key->n) == 4096) {
|
---|
| 634 | ret = sp_ModExp_4096(k, &key->e, &key->n, tmp);
|
---|
| 635 | if (ret != 0)
|
---|
| 636 | ret = MP_EXPTMOD_E;
|
---|
| 637 | ret = sp_ModExp_4096(tmp, &key->d, &key->n, tmp);
|
---|
| 638 | if (ret != 0)
|
---|
| 639 | ret = MP_EXPTMOD_E;
|
---|
| 640 | }
|
---|
| 641 | else
|
---|
| 642 | #endif
|
---|
| 643 | #endif
|
---|
| 644 | #ifdef WOLFSSL_SP_MATH
|
---|
| 645 | {
|
---|
| 646 | ret = WC_KEY_SIZE_E;
|
---|
| 647 | }
|
---|
| 648 | #else
|
---|
| 649 | {
|
---|
| 650 | if (ret == 0) {
|
---|
| 651 | if (mp_exptmod(k, &key->e, &key->n, tmp) != MP_OKAY)
|
---|
| 652 | ret = MP_EXPTMOD_E;
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | if (ret == 0) {
|
---|
| 656 | if (mp_exptmod(tmp, &key->d, &key->n, tmp) != MP_OKAY)
|
---|
| 657 | ret = MP_EXPTMOD_E;
|
---|
| 658 | }
|
---|
| 659 | }
|
---|
| 660 | #endif
|
---|
| 661 |
|
---|
| 662 | if (ret == 0) {
|
---|
| 663 | if (mp_cmp(k, tmp) != MP_EQ)
|
---|
| 664 | ret = RSA_KEY_PAIR_E;
|
---|
| 665 | }
|
---|
| 666 |
|
---|
| 667 | /* Check d is less than n. */
|
---|
| 668 | if (ret == 0 ) {
|
---|
| 669 | if (mp_cmp(&key->d, &key->n) != MP_LT) {
|
---|
| 670 | ret = MP_EXPTMOD_E;
|
---|
| 671 | }
|
---|
| 672 | }
|
---|
| 673 | /* Check p*q = n. */
|
---|
| 674 | if (ret == 0 ) {
|
---|
| 675 | if (mp_mul(&key->p, &key->q, tmp) != MP_OKAY) {
|
---|
| 676 | ret = MP_EXPTMOD_E;
|
---|
| 677 | }
|
---|
| 678 | }
|
---|
| 679 | if (ret == 0 ) {
|
---|
| 680 | if (mp_cmp(&key->n, tmp) != MP_EQ) {
|
---|
| 681 | ret = MP_EXPTMOD_E;
|
---|
| 682 | }
|
---|
| 683 | }
|
---|
| 684 |
|
---|
| 685 | /* Check dP, dQ and u if they exist */
|
---|
| 686 | if (ret == 0 && !mp_iszero(&key->dP)) {
|
---|
| 687 | if (mp_sub_d(&key->p, 1, tmp) != MP_OKAY) {
|
---|
| 688 | ret = MP_EXPTMOD_E;
|
---|
| 689 | }
|
---|
| 690 | /* Check dP <= p-1. */
|
---|
| 691 | if (ret == 0) {
|
---|
| 692 | if (mp_cmp(&key->dP, tmp) != MP_LT) {
|
---|
| 693 | ret = MP_EXPTMOD_E;
|
---|
| 694 | }
|
---|
| 695 | }
|
---|
| 696 | /* Check e*dP mod p-1 = 1. (dP = 1/e mod p-1) */
|
---|
| 697 | if (ret == 0) {
|
---|
| 698 | if (mp_mulmod(&key->dP, &key->e, tmp, tmp) != MP_OKAY) {
|
---|
| 699 | ret = MP_EXPTMOD_E;
|
---|
| 700 | }
|
---|
| 701 | }
|
---|
| 702 | if (ret == 0 ) {
|
---|
| 703 | if (!mp_isone(tmp)) {
|
---|
| 704 | ret = MP_EXPTMOD_E;
|
---|
| 705 | }
|
---|
| 706 | }
|
---|
| 707 |
|
---|
| 708 | if (ret == 0) {
|
---|
| 709 | if (mp_sub_d(&key->q, 1, tmp) != MP_OKAY) {
|
---|
| 710 | ret = MP_EXPTMOD_E;
|
---|
| 711 | }
|
---|
| 712 | }
|
---|
| 713 | /* Check dQ <= q-1. */
|
---|
| 714 | if (ret == 0) {
|
---|
| 715 | if (mp_cmp(&key->dQ, tmp) != MP_LT) {
|
---|
| 716 | ret = MP_EXPTMOD_E;
|
---|
| 717 | }
|
---|
| 718 | }
|
---|
| 719 | /* Check e*dP mod p-1 = 1. (dQ = 1/e mod q-1) */
|
---|
| 720 | if (ret == 0) {
|
---|
| 721 | if (mp_mulmod(&key->dQ, &key->e, tmp, tmp) != MP_OKAY) {
|
---|
| 722 | ret = MP_EXPTMOD_E;
|
---|
| 723 | }
|
---|
| 724 | }
|
---|
| 725 | if (ret == 0 ) {
|
---|
| 726 | if (!mp_isone(tmp)) {
|
---|
| 727 | ret = MP_EXPTMOD_E;
|
---|
| 728 | }
|
---|
| 729 | }
|
---|
| 730 |
|
---|
| 731 | /* Check u <= p. */
|
---|
| 732 | if (ret == 0) {
|
---|
| 733 | if (mp_cmp(&key->u, &key->p) != MP_LT) {
|
---|
| 734 | ret = MP_EXPTMOD_E;
|
---|
| 735 | }
|
---|
| 736 | }
|
---|
| 737 | /* Check u*q mod p = 1. (u = 1/q mod p) */
|
---|
| 738 | if (ret == 0) {
|
---|
| 739 | if (mp_mulmod(&key->u, &key->q, &key->p, tmp) != MP_OKAY) {
|
---|
| 740 | ret = MP_EXPTMOD_E;
|
---|
| 741 | }
|
---|
| 742 | }
|
---|
| 743 | if (ret == 0 ) {
|
---|
| 744 | if (!mp_isone(tmp)) {
|
---|
| 745 | ret = MP_EXPTMOD_E;
|
---|
| 746 | }
|
---|
| 747 | }
|
---|
| 748 | }
|
---|
| 749 |
|
---|
| 750 | mp_forcezero(tmp);
|
---|
| 751 | mp_clear(tmp);
|
---|
| 752 | mp_clear(k);
|
---|
| 753 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 754 | XFREE(k, NULL, DYNAMIC_TYPE_RSA);
|
---|
| 755 | #endif
|
---|
| 756 |
|
---|
| 757 | return ret;
|
---|
| 758 | }
|
---|
| 759 | #endif
|
---|
| 760 | #endif
|
---|
| 761 |
|
---|
| 762 |
|
---|
| 763 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_PSS)
|
---|
| 764 | /* Uses MGF1 standard as a mask generation function
|
---|
| 765 | hType: hash type used
|
---|
| 766 | seed: seed to use for generating mask
|
---|
| 767 | seedSz: size of seed buffer
|
---|
| 768 | out: mask output after generation
|
---|
| 769 | outSz: size of output buffer
|
---|
| 770 | */
|
---|
| 771 | #if !defined(NO_SHA) || !defined(NO_SHA256) || defined(WOLFSSL_SHA384) || defined(WOLFSSL_SHA512)
|
---|
| 772 | static int RsaMGF1(enum wc_HashType hType, byte* seed, word32 seedSz,
|
---|
| 773 | byte* out, word32 outSz, void* heap)
|
---|
| 774 | {
|
---|
| 775 | byte* tmp;
|
---|
| 776 | /* needs to be large enough for seed size plus counter(4) */
|
---|
| 777 | byte tmpA[WC_MAX_DIGEST_SIZE + 4];
|
---|
| 778 | byte tmpF; /* 1 if dynamic memory needs freed */
|
---|
| 779 | word32 tmpSz;
|
---|
| 780 | int hLen;
|
---|
| 781 | int ret;
|
---|
| 782 | word32 counter;
|
---|
| 783 | word32 idx;
|
---|
| 784 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 785 | counter = 0;
|
---|
| 786 | idx = 0;
|
---|
| 787 |
|
---|
| 788 | (void)heap;
|
---|
| 789 |
|
---|
| 790 | /* check error return of wc_HashGetDigestSize */
|
---|
| 791 | if (hLen < 0) {
|
---|
| 792 | return hLen;
|
---|
| 793 | }
|
---|
| 794 |
|
---|
| 795 | /* if tmp is not large enough than use some dynamic memory */
|
---|
| 796 | if ((seedSz + 4) > sizeof(tmpA) || (word32)hLen > sizeof(tmpA)) {
|
---|
| 797 | /* find largest amount of memory needed which will be the max of
|
---|
| 798 | * hLen and (seedSz + 4) since tmp is used to store the hash digest */
|
---|
| 799 | tmpSz = ((seedSz + 4) > (word32)hLen)? seedSz + 4: (word32)hLen;
|
---|
| 800 | tmp = (byte*)XMALLOC(tmpSz, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 801 | if (tmp == NULL) {
|
---|
| 802 | return MEMORY_E;
|
---|
| 803 | }
|
---|
| 804 | tmpF = 1; /* make sure to free memory when done */
|
---|
| 805 | }
|
---|
| 806 | else {
|
---|
| 807 | /* use array on the stack */
|
---|
| 808 | tmpSz = sizeof(tmpA);
|
---|
| 809 | tmp = tmpA;
|
---|
| 810 | tmpF = 0; /* no need to free memory at end */
|
---|
| 811 | }
|
---|
| 812 |
|
---|
| 813 | do {
|
---|
| 814 | int i = 0;
|
---|
| 815 | XMEMCPY(tmp, seed, seedSz);
|
---|
| 816 |
|
---|
| 817 | /* counter to byte array appended to tmp */
|
---|
| 818 | tmp[seedSz] = (counter >> 24) & 0xFF;
|
---|
| 819 | tmp[seedSz + 1] = (counter >> 16) & 0xFF;
|
---|
| 820 | tmp[seedSz + 2] = (counter >> 8) & 0xFF;
|
---|
| 821 | tmp[seedSz + 3] = (counter) & 0xFF;
|
---|
| 822 |
|
---|
| 823 | /* hash and append to existing output */
|
---|
| 824 | if ((ret = wc_Hash(hType, tmp, (seedSz + 4), tmp, tmpSz)) != 0) {
|
---|
| 825 | /* check for if dynamic memory was needed, then free */
|
---|
| 826 | if (tmpF) {
|
---|
| 827 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 828 | }
|
---|
| 829 | return ret;
|
---|
| 830 | }
|
---|
| 831 |
|
---|
| 832 | for (i = 0; i < hLen && idx < outSz; i++) {
|
---|
| 833 | out[idx++] = tmp[i];
|
---|
| 834 | }
|
---|
| 835 | counter++;
|
---|
| 836 | } while (idx < outSz);
|
---|
| 837 |
|
---|
| 838 | /* check for if dynamic memory was needed, then free */
|
---|
| 839 | if (tmpF) {
|
---|
| 840 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 841 | }
|
---|
| 842 |
|
---|
| 843 | return 0;
|
---|
| 844 | }
|
---|
| 845 | #endif /* SHA2 Hashes */
|
---|
| 846 |
|
---|
| 847 | /* helper function to direct which mask generation function is used
|
---|
| 848 | switched on type input
|
---|
| 849 | */
|
---|
| 850 | static int RsaMGF(int type, byte* seed, word32 seedSz, byte* out,
|
---|
| 851 | word32 outSz, void* heap)
|
---|
| 852 | {
|
---|
| 853 | int ret;
|
---|
| 854 |
|
---|
| 855 | switch(type) {
|
---|
| 856 | #ifndef NO_SHA
|
---|
| 857 | case WC_MGF1SHA1:
|
---|
| 858 | ret = RsaMGF1(WC_HASH_TYPE_SHA, seed, seedSz, out, outSz, heap);
|
---|
| 859 | break;
|
---|
| 860 | #endif
|
---|
| 861 | #ifndef NO_SHA256
|
---|
| 862 | #ifdef WOLFSSL_SHA224
|
---|
| 863 | case WC_MGF1SHA224:
|
---|
| 864 | ret = RsaMGF1(WC_HASH_TYPE_SHA224, seed, seedSz, out, outSz, heap);
|
---|
| 865 | break;
|
---|
| 866 | #endif
|
---|
| 867 | case WC_MGF1SHA256:
|
---|
| 868 | ret = RsaMGF1(WC_HASH_TYPE_SHA256, seed, seedSz, out, outSz, heap);
|
---|
| 869 | break;
|
---|
| 870 | #endif
|
---|
| 871 | #ifdef WOLFSSL_SHA384
|
---|
| 872 | case WC_MGF1SHA384:
|
---|
| 873 | ret = RsaMGF1(WC_HASH_TYPE_SHA384, seed, seedSz, out, outSz, heap);
|
---|
| 874 | break;
|
---|
| 875 | #endif
|
---|
| 876 | #ifdef WOLFSSL_SHA512
|
---|
| 877 | case WC_MGF1SHA512:
|
---|
| 878 | ret = RsaMGF1(WC_HASH_TYPE_SHA512, seed, seedSz, out, outSz, heap);
|
---|
| 879 | break;
|
---|
| 880 | #endif
|
---|
| 881 | default:
|
---|
| 882 | WOLFSSL_MSG("Unknown MGF type: check build options");
|
---|
| 883 | ret = BAD_FUNC_ARG;
|
---|
| 884 | }
|
---|
| 885 |
|
---|
| 886 | /* in case of default avoid unused warning */
|
---|
| 887 | (void)seed;
|
---|
| 888 | (void)seedSz;
|
---|
| 889 | (void)out;
|
---|
| 890 | (void)outSz;
|
---|
| 891 | (void)heap;
|
---|
| 892 |
|
---|
| 893 | return ret;
|
---|
| 894 | }
|
---|
| 895 | #endif /* !WC_NO_RSA_OAEP || WC_RSA_PSS */
|
---|
| 896 |
|
---|
| 897 |
|
---|
| 898 | /* Padding */
|
---|
| 899 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 900 | #ifndef WC_NO_RNG
|
---|
| 901 | #ifndef WC_NO_RSA_OAEP
|
---|
| 902 | static int RsaPad_OAEP(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 903 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng,
|
---|
| 904 | enum wc_HashType hType, int mgf, byte* optLabel, word32 labelLen,
|
---|
| 905 | void* heap)
|
---|
| 906 | {
|
---|
| 907 | int ret;
|
---|
| 908 | int hLen;
|
---|
| 909 | int psLen;
|
---|
| 910 | int i;
|
---|
| 911 | word32 idx;
|
---|
| 912 |
|
---|
| 913 | byte* dbMask;
|
---|
| 914 |
|
---|
| 915 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 916 | byte* lHash = NULL;
|
---|
| 917 | byte* seed = NULL;
|
---|
| 918 | #else
|
---|
| 919 | /* must be large enough to contain largest hash */
|
---|
| 920 | byte lHash[WC_MAX_DIGEST_SIZE];
|
---|
| 921 | byte seed[ WC_MAX_DIGEST_SIZE];
|
---|
| 922 | #endif
|
---|
| 923 |
|
---|
| 924 | /* no label is allowed, but catch if no label provided and length > 0 */
|
---|
| 925 | if (optLabel == NULL && labelLen > 0) {
|
---|
| 926 | return BUFFER_E;
|
---|
| 927 | }
|
---|
| 928 |
|
---|
| 929 | /* limit of label is the same as limit of hash function which is massive */
|
---|
| 930 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 931 | if (hLen < 0) {
|
---|
| 932 | return hLen;
|
---|
| 933 | }
|
---|
| 934 |
|
---|
| 935 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 936 | lHash = (byte*)XMALLOC(hLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 937 | if (lHash == NULL) {
|
---|
| 938 | return MEMORY_E;
|
---|
| 939 | }
|
---|
| 940 | seed = (byte*)XMALLOC(hLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 941 | if (seed == NULL) {
|
---|
| 942 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 943 | return MEMORY_E;
|
---|
| 944 | }
|
---|
| 945 | #else
|
---|
| 946 | /* hLen should never be larger than lHash since size is max digest size,
|
---|
| 947 | but check before blindly calling wc_Hash */
|
---|
| 948 | if ((word32)hLen > sizeof(lHash)) {
|
---|
| 949 | WOLFSSL_MSG("OAEP lHash to small for digest!!");
|
---|
| 950 | return MEMORY_E;
|
---|
| 951 | }
|
---|
| 952 | #endif
|
---|
| 953 |
|
---|
| 954 | if ((ret = wc_Hash(hType, optLabel, labelLen, lHash, hLen)) != 0) {
|
---|
| 955 | WOLFSSL_MSG("OAEP hash type possibly not supported or lHash to small");
|
---|
| 956 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 957 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 958 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 959 | #endif
|
---|
| 960 | return ret;
|
---|
| 961 | }
|
---|
| 962 |
|
---|
| 963 | /* handles check of location for idx as well as psLen, cast to int to check
|
---|
| 964 | for pkcsBlockLen(k) - 2 * hLen - 2 being negative
|
---|
| 965 | This check is similar to decryption where k > 2 * hLen + 2 as msg
|
---|
| 966 | size approaches 0. In decryption if k is less than or equal -- then there
|
---|
| 967 | is no possible room for msg.
|
---|
| 968 | k = RSA key size
|
---|
| 969 | hLen = hash digest size -- will always be >= 0 at this point
|
---|
| 970 | */
|
---|
| 971 | if ((word32)(2 * hLen + 2) > pkcsBlockLen) {
|
---|
| 972 | WOLFSSL_MSG("OAEP pad error hash to big for RSA key size");
|
---|
| 973 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 974 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 975 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 976 | #endif
|
---|
| 977 | return BAD_FUNC_ARG;
|
---|
| 978 | }
|
---|
| 979 |
|
---|
| 980 | if (inputLen > (pkcsBlockLen - 2 * hLen - 2)) {
|
---|
| 981 | WOLFSSL_MSG("OAEP pad error message too long");
|
---|
| 982 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 983 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 984 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 985 | #endif
|
---|
| 986 | return BAD_FUNC_ARG;
|
---|
| 987 | }
|
---|
| 988 |
|
---|
| 989 | /* concatenate lHash || PS || 0x01 || msg */
|
---|
| 990 | idx = pkcsBlockLen - 1 - inputLen;
|
---|
| 991 | psLen = pkcsBlockLen - inputLen - 2 * hLen - 2;
|
---|
| 992 | if (pkcsBlockLen < inputLen) { /*make sure not writing over end of buffer */
|
---|
| 993 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 994 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 995 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 996 | #endif
|
---|
| 997 | return BUFFER_E;
|
---|
| 998 | }
|
---|
| 999 | XMEMCPY(pkcsBlock + (pkcsBlockLen - inputLen), input, inputLen);
|
---|
| 1000 | pkcsBlock[idx--] = 0x01; /* PS and M separator */
|
---|
| 1001 | while (psLen > 0 && idx > 0) {
|
---|
| 1002 | pkcsBlock[idx--] = 0x00;
|
---|
| 1003 | psLen--;
|
---|
| 1004 | }
|
---|
| 1005 |
|
---|
| 1006 | idx = idx - hLen + 1;
|
---|
| 1007 | XMEMCPY(pkcsBlock + idx, lHash, hLen);
|
---|
| 1008 |
|
---|
| 1009 | /* generate random seed */
|
---|
| 1010 | if ((ret = wc_RNG_GenerateBlock(rng, seed, hLen)) != 0) {
|
---|
| 1011 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1012 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1013 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1014 | #endif
|
---|
| 1015 | return ret;
|
---|
| 1016 | }
|
---|
| 1017 |
|
---|
| 1018 | /* create maskedDB from dbMask */
|
---|
| 1019 | dbMask = (byte*)XMALLOC(pkcsBlockLen - hLen - 1, heap, DYNAMIC_TYPE_RSA);
|
---|
| 1020 | if (dbMask == NULL) {
|
---|
| 1021 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1022 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1023 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1024 | #endif
|
---|
| 1025 | return MEMORY_E;
|
---|
| 1026 | }
|
---|
| 1027 | XMEMSET(dbMask, 0, pkcsBlockLen - hLen - 1); /* help static analyzer */
|
---|
| 1028 |
|
---|
| 1029 | ret = RsaMGF(mgf, seed, hLen, dbMask, pkcsBlockLen - hLen - 1, heap);
|
---|
| 1030 | if (ret != 0) {
|
---|
| 1031 | XFREE(dbMask, heap, DYNAMIC_TYPE_RSA);
|
---|
| 1032 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1033 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1034 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1035 | #endif
|
---|
| 1036 | return ret;
|
---|
| 1037 | }
|
---|
| 1038 |
|
---|
| 1039 | i = 0;
|
---|
| 1040 | idx = hLen + 1;
|
---|
| 1041 | while (idx < pkcsBlockLen && (word32)i < (pkcsBlockLen - hLen -1)) {
|
---|
| 1042 | pkcsBlock[idx] = dbMask[i++] ^ pkcsBlock[idx];
|
---|
| 1043 | idx++;
|
---|
| 1044 | }
|
---|
| 1045 | XFREE(dbMask, heap, DYNAMIC_TYPE_RSA);
|
---|
| 1046 |
|
---|
| 1047 |
|
---|
| 1048 | /* create maskedSeed from seedMask */
|
---|
| 1049 | idx = 0;
|
---|
| 1050 | pkcsBlock[idx++] = 0x00;
|
---|
| 1051 | /* create seedMask inline */
|
---|
| 1052 | if ((ret = RsaMGF(mgf, pkcsBlock + hLen + 1, pkcsBlockLen - hLen - 1,
|
---|
| 1053 | pkcsBlock + 1, hLen, heap)) != 0) {
|
---|
| 1054 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1055 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1056 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1057 | #endif
|
---|
| 1058 | return ret;
|
---|
| 1059 | }
|
---|
| 1060 |
|
---|
| 1061 | /* xor created seedMask with seed to make maskedSeed */
|
---|
| 1062 | i = 0;
|
---|
| 1063 | while (idx < (word32)(hLen + 1) && i < hLen) {
|
---|
| 1064 | pkcsBlock[idx] = pkcsBlock[idx] ^ seed[i++];
|
---|
| 1065 | idx++;
|
---|
| 1066 | }
|
---|
| 1067 |
|
---|
| 1068 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 1069 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1070 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1071 | #endif
|
---|
| 1072 | (void)padValue;
|
---|
| 1073 |
|
---|
| 1074 | return 0;
|
---|
| 1075 | }
|
---|
| 1076 | #endif /* !WC_NO_RSA_OAEP */
|
---|
| 1077 |
|
---|
| 1078 | #ifdef WC_RSA_PSS
|
---|
| 1079 |
|
---|
| 1080 | /* 0x00 .. 0x00 0x01 | Salt | Gen Hash | 0xbc
|
---|
| 1081 | * XOR MGF over all bytes down to end of Salt
|
---|
| 1082 | * Gen Hash = HASH(8 * 0x00 | Message Hash | Salt)
|
---|
| 1083 | *
|
---|
| 1084 | * input Digest of the message.
|
---|
| 1085 | * inputLen Length of digest.
|
---|
| 1086 | * pkcsBlock Buffer to write to.
|
---|
| 1087 | * pkcsBlockLen Length of buffer to write to.
|
---|
| 1088 | * rng Random number generator (for salt).
|
---|
| 1089 | * htype Hash function to use.
|
---|
| 1090 | * mgf Mask generation function.
|
---|
| 1091 | * saltLen Length of salt to put in padding.
|
---|
| 1092 | * bits Length of key in bits.
|
---|
| 1093 | * heap Used for dynamic memory allocation.
|
---|
| 1094 | * returns 0 on success, PSS_SALTLEN_E when the salt length is invalid
|
---|
| 1095 | * and other negative values on error.
|
---|
| 1096 | */
|
---|
| 1097 | static int RsaPad_PSS(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 1098 | word32 pkcsBlockLen, WC_RNG* rng, enum wc_HashType hType, int mgf,
|
---|
| 1099 | int saltLen, int bits, void* heap)
|
---|
| 1100 | {
|
---|
| 1101 | int ret = 0;
|
---|
| 1102 | int hLen, i, o, maskLen, hiBits;
|
---|
| 1103 | byte* m;
|
---|
| 1104 | byte* s;
|
---|
| 1105 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
| 1106 | #if defined(WOLFSSL_NO_MALLOC) && !defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1107 | byte salt[RSA_MAX_SIZE/8 + RSA_PSS_PAD_SZ];
|
---|
| 1108 | #else
|
---|
| 1109 | byte* salt = NULL;
|
---|
| 1110 | #endif
|
---|
| 1111 | #else
|
---|
| 1112 | byte salt[WC_MAX_DIGEST_SIZE];
|
---|
| 1113 | #endif
|
---|
| 1114 |
|
---|
| 1115 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
| 1116 | if (pkcsBlockLen > RSA_MAX_SIZE/8) {
|
---|
| 1117 | return MEMORY_E;
|
---|
| 1118 | }
|
---|
| 1119 | #endif
|
---|
| 1120 |
|
---|
| 1121 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 1122 | if (hLen < 0)
|
---|
| 1123 | return hLen;
|
---|
| 1124 |
|
---|
| 1125 | hiBits = (bits - 1) & 0x7;
|
---|
| 1126 | if (hiBits == 0) {
|
---|
| 1127 | *(pkcsBlock++) = 0;
|
---|
| 1128 | pkcsBlockLen--;
|
---|
| 1129 | }
|
---|
| 1130 |
|
---|
| 1131 | if (saltLen == RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
| 1132 | saltLen = hLen;
|
---|
| 1133 | #ifdef WOLFSSL_SHA512
|
---|
| 1134 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
| 1135 | if (bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE) {
|
---|
| 1136 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
| 1137 | }
|
---|
| 1138 | #endif
|
---|
| 1139 | }
|
---|
| 1140 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
| 1141 | else if (saltLen > hLen) {
|
---|
| 1142 | return PSS_SALTLEN_E;
|
---|
| 1143 | }
|
---|
| 1144 | #endif
|
---|
| 1145 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
| 1146 | else if (saltLen < RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
| 1147 | return PSS_SALTLEN_E;
|
---|
| 1148 | }
|
---|
| 1149 | #else
|
---|
| 1150 | else if (saltLen == RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
| 1151 | saltLen = (int)pkcsBlockLen - hLen - 2;
|
---|
| 1152 | if (saltLen < 0) {
|
---|
| 1153 | return PSS_SALTLEN_E;
|
---|
| 1154 | }
|
---|
| 1155 | }
|
---|
| 1156 | else if (saltLen < RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
| 1157 | return PSS_SALTLEN_E;
|
---|
| 1158 | }
|
---|
| 1159 | #endif
|
---|
| 1160 | if ((int)pkcsBlockLen - hLen < saltLen + 2) {
|
---|
| 1161 | return PSS_SALTLEN_E;
|
---|
| 1162 | }
|
---|
| 1163 |
|
---|
| 1164 | maskLen = pkcsBlockLen - 1 - hLen;
|
---|
| 1165 |
|
---|
| 1166 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
| 1167 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1168 | salt = (byte*)XMALLOC(RSA_PSS_PAD_SZ + inputLen + saltLen, heap,
|
---|
| 1169 | DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1170 | if (salt == NULL) {
|
---|
| 1171 | return MEMORY_E;
|
---|
| 1172 | }
|
---|
| 1173 | #endif
|
---|
| 1174 | s = m = salt;
|
---|
| 1175 | XMEMSET(m, 0, RSA_PSS_PAD_SZ);
|
---|
| 1176 | m += RSA_PSS_PAD_SZ;
|
---|
| 1177 | XMEMCPY(m, input, inputLen);
|
---|
| 1178 | m += inputLen;
|
---|
| 1179 | o = (int)(m - s);
|
---|
| 1180 | if (saltLen > 0) {
|
---|
| 1181 | ret = wc_RNG_GenerateBlock(rng, m, saltLen);
|
---|
| 1182 | if (ret == 0) {
|
---|
| 1183 | m += saltLen;
|
---|
| 1184 | }
|
---|
| 1185 | }
|
---|
| 1186 | #else
|
---|
| 1187 | s = m = pkcsBlock;
|
---|
| 1188 | XMEMSET(m, 0, RSA_PSS_PAD_SZ);
|
---|
| 1189 | m += RSA_PSS_PAD_SZ;
|
---|
| 1190 | XMEMCPY(m, input, inputLen);
|
---|
| 1191 | m += inputLen;
|
---|
| 1192 | o = 0;
|
---|
| 1193 | if (saltLen > 0) {
|
---|
| 1194 | ret = wc_RNG_GenerateBlock(rng, salt, saltLen);
|
---|
| 1195 | if (ret == 0) {
|
---|
| 1196 | XMEMCPY(m, salt, saltLen);
|
---|
| 1197 | m += saltLen;
|
---|
| 1198 | }
|
---|
| 1199 | }
|
---|
| 1200 | #endif
|
---|
| 1201 | if (ret == 0) {
|
---|
| 1202 | /* Put Hash at end of pkcsBlock - 1 */
|
---|
| 1203 | ret = wc_Hash(hType, s, (word32)(m - s), pkcsBlock + maskLen, hLen);
|
---|
| 1204 | }
|
---|
| 1205 | if (ret == 0) {
|
---|
| 1206 | pkcsBlock[pkcsBlockLen - 1] = RSA_PSS_PAD_TERM;
|
---|
| 1207 |
|
---|
| 1208 | ret = RsaMGF(mgf, pkcsBlock + maskLen, hLen, pkcsBlock, maskLen, heap);
|
---|
| 1209 | }
|
---|
| 1210 | if (ret == 0) {
|
---|
| 1211 | pkcsBlock[0] &= (1 << hiBits) - 1;
|
---|
| 1212 |
|
---|
| 1213 | m = pkcsBlock + maskLen - saltLen - 1;
|
---|
| 1214 | *(m++) ^= 0x01;
|
---|
| 1215 | for (i = 0; i < saltLen; i++) {
|
---|
| 1216 | m[i] ^= salt[o + i];
|
---|
| 1217 | }
|
---|
| 1218 | }
|
---|
| 1219 |
|
---|
| 1220 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
| 1221 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1222 | if (salt != NULL) {
|
---|
| 1223 | XFREE(salt, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1224 | }
|
---|
| 1225 | #endif
|
---|
| 1226 | #endif
|
---|
| 1227 | return ret;
|
---|
| 1228 | }
|
---|
| 1229 | #endif /* WC_RSA_PSS */
|
---|
| 1230 | #endif /* !WC_NO_RNG */
|
---|
| 1231 |
|
---|
| 1232 | static int RsaPad(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 1233 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng)
|
---|
| 1234 | {
|
---|
| 1235 | if (input == NULL || inputLen == 0 || pkcsBlock == NULL ||
|
---|
| 1236 | pkcsBlockLen == 0) {
|
---|
| 1237 | return BAD_FUNC_ARG;
|
---|
| 1238 | }
|
---|
| 1239 |
|
---|
| 1240 | pkcsBlock[0] = 0x0; /* set first byte to zero and advance */
|
---|
| 1241 | pkcsBlock++; pkcsBlockLen--;
|
---|
| 1242 | pkcsBlock[0] = padValue; /* insert padValue */
|
---|
| 1243 |
|
---|
| 1244 | if (padValue == RSA_BLOCK_TYPE_1) {
|
---|
| 1245 | if (pkcsBlockLen < inputLen + 2) {
|
---|
| 1246 | WOLFSSL_MSG("RsaPad error, invalid length");
|
---|
| 1247 | return RSA_PAD_E;
|
---|
| 1248 | }
|
---|
| 1249 |
|
---|
| 1250 | /* pad with 0xff bytes */
|
---|
| 1251 | XMEMSET(&pkcsBlock[1], 0xFF, pkcsBlockLen - inputLen - 2);
|
---|
| 1252 | }
|
---|
| 1253 | else {
|
---|
| 1254 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WC_NO_RNG)
|
---|
| 1255 | /* pad with non-zero random bytes */
|
---|
| 1256 | word32 padLen, i;
|
---|
| 1257 | int ret;
|
---|
| 1258 |
|
---|
| 1259 | if (pkcsBlockLen < inputLen + 1) {
|
---|
| 1260 | WOLFSSL_MSG("RsaPad error, invalid length");
|
---|
| 1261 | return RSA_PAD_E;
|
---|
| 1262 | }
|
---|
| 1263 |
|
---|
| 1264 | padLen = pkcsBlockLen - inputLen - 1;
|
---|
| 1265 | ret = wc_RNG_GenerateBlock(rng, &pkcsBlock[1], padLen);
|
---|
| 1266 | if (ret != 0) {
|
---|
| 1267 | return ret;
|
---|
| 1268 | }
|
---|
| 1269 |
|
---|
| 1270 | /* remove zeros */
|
---|
| 1271 | for (i = 1; i < padLen; i++) {
|
---|
| 1272 | if (pkcsBlock[i] == 0) pkcsBlock[i] = 0x01;
|
---|
| 1273 | }
|
---|
| 1274 | #else
|
---|
| 1275 | (void)rng;
|
---|
| 1276 | return RSA_WRONG_TYPE_E;
|
---|
| 1277 | #endif
|
---|
| 1278 | }
|
---|
| 1279 |
|
---|
| 1280 | pkcsBlock[pkcsBlockLen-inputLen-1] = 0; /* separator */
|
---|
| 1281 | XMEMCPY(pkcsBlock+pkcsBlockLen-inputLen, input, inputLen);
|
---|
| 1282 |
|
---|
| 1283 | return 0;
|
---|
| 1284 | }
|
---|
| 1285 |
|
---|
| 1286 | /* helper function to direct which padding is used */
|
---|
| 1287 | int wc_RsaPad_ex(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 1288 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng, int padType,
|
---|
| 1289 | enum wc_HashType hType, int mgf, byte* optLabel, word32 labelLen,
|
---|
| 1290 | int saltLen, int bits, void* heap)
|
---|
| 1291 | {
|
---|
| 1292 | int ret;
|
---|
| 1293 |
|
---|
| 1294 | switch (padType)
|
---|
| 1295 | {
|
---|
| 1296 | case WC_RSA_PKCSV15_PAD:
|
---|
| 1297 | /*WOLFSSL_MSG("wolfSSL Using RSA PKCSV15 padding");*/
|
---|
| 1298 | ret = RsaPad(input, inputLen, pkcsBlock, pkcsBlockLen,
|
---|
| 1299 | padValue, rng);
|
---|
| 1300 | break;
|
---|
| 1301 |
|
---|
| 1302 | #ifndef WC_NO_RNG
|
---|
| 1303 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1304 | case WC_RSA_OAEP_PAD:
|
---|
| 1305 | WOLFSSL_MSG("wolfSSL Using RSA OAEP padding");
|
---|
| 1306 | ret = RsaPad_OAEP(input, inputLen, pkcsBlock, pkcsBlockLen,
|
---|
| 1307 | padValue, rng, hType, mgf, optLabel, labelLen, heap);
|
---|
| 1308 | break;
|
---|
| 1309 | #endif
|
---|
| 1310 |
|
---|
| 1311 | #ifdef WC_RSA_PSS
|
---|
| 1312 | case WC_RSA_PSS_PAD:
|
---|
| 1313 | WOLFSSL_MSG("wolfSSL Using RSA PSS padding");
|
---|
| 1314 | ret = RsaPad_PSS(input, inputLen, pkcsBlock, pkcsBlockLen, rng,
|
---|
| 1315 | hType, mgf, saltLen, bits, heap);
|
---|
| 1316 | break;
|
---|
| 1317 | #endif
|
---|
| 1318 | #endif /* !WC_NO_RNG */
|
---|
| 1319 |
|
---|
| 1320 | #ifdef WC_RSA_NO_PADDING
|
---|
| 1321 | case WC_RSA_NO_PAD:
|
---|
| 1322 | WOLFSSL_MSG("wolfSSL Using NO padding");
|
---|
| 1323 |
|
---|
| 1324 | /* In the case of no padding being used check that input is exactly
|
---|
| 1325 | * the RSA key length */
|
---|
| 1326 | if (bits <= 0 || inputLen != ((word32)bits/WOLFSSL_BIT_SIZE)) {
|
---|
| 1327 | WOLFSSL_MSG("Bad input size");
|
---|
| 1328 | ret = RSA_PAD_E;
|
---|
| 1329 | }
|
---|
| 1330 | else {
|
---|
| 1331 | XMEMCPY(pkcsBlock, input, inputLen);
|
---|
| 1332 | ret = 0;
|
---|
| 1333 | }
|
---|
| 1334 | break;
|
---|
| 1335 | #endif
|
---|
| 1336 |
|
---|
| 1337 | default:
|
---|
| 1338 | WOLFSSL_MSG("Unknown RSA Pad Type");
|
---|
| 1339 | ret = RSA_PAD_E;
|
---|
| 1340 | }
|
---|
| 1341 |
|
---|
| 1342 | /* silence warning if not used with padding scheme */
|
---|
| 1343 | (void)input;
|
---|
| 1344 | (void)inputLen;
|
---|
| 1345 | (void)pkcsBlock;
|
---|
| 1346 | (void)pkcsBlockLen;
|
---|
| 1347 | (void)padValue;
|
---|
| 1348 | (void)rng;
|
---|
| 1349 | (void)padType;
|
---|
| 1350 | (void)hType;
|
---|
| 1351 | (void)mgf;
|
---|
| 1352 | (void)optLabel;
|
---|
| 1353 | (void)labelLen;
|
---|
| 1354 | (void)saltLen;
|
---|
| 1355 | (void)bits;
|
---|
| 1356 | (void)heap;
|
---|
| 1357 |
|
---|
| 1358 | return ret;
|
---|
| 1359 | }
|
---|
| 1360 | #endif /* WOLFSSL_RSA_VERIFY_ONLY */
|
---|
| 1361 |
|
---|
| 1362 |
|
---|
| 1363 | /* UnPadding */
|
---|
| 1364 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1365 | /* UnPad plaintext, set start to *output, return length of plaintext,
|
---|
| 1366 | * < 0 on error */
|
---|
| 1367 | static int RsaUnPad_OAEP(byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
| 1368 | byte **output, enum wc_HashType hType, int mgf,
|
---|
| 1369 | byte* optLabel, word32 labelLen, void* heap)
|
---|
| 1370 | {
|
---|
| 1371 | int hLen;
|
---|
| 1372 | int ret;
|
---|
| 1373 | byte h[WC_MAX_DIGEST_SIZE]; /* max digest size */
|
---|
| 1374 | byte* tmp;
|
---|
| 1375 | word32 idx;
|
---|
| 1376 |
|
---|
| 1377 | /* no label is allowed, but catch if no label provided and length > 0 */
|
---|
| 1378 | if (optLabel == NULL && labelLen > 0) {
|
---|
| 1379 | return BUFFER_E;
|
---|
| 1380 | }
|
---|
| 1381 |
|
---|
| 1382 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 1383 | if ((hLen < 0) || (pkcsBlockLen < (2 * (word32)hLen + 2))) {
|
---|
| 1384 | return BAD_FUNC_ARG;
|
---|
| 1385 | }
|
---|
| 1386 |
|
---|
| 1387 | tmp = (byte*)XMALLOC(pkcsBlockLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1388 | if (tmp == NULL) {
|
---|
| 1389 | return MEMORY_E;
|
---|
| 1390 | }
|
---|
| 1391 | XMEMSET(tmp, 0, pkcsBlockLen);
|
---|
| 1392 |
|
---|
| 1393 | /* find seedMask value */
|
---|
| 1394 | if ((ret = RsaMGF(mgf, (byte*)(pkcsBlock + (hLen + 1)),
|
---|
| 1395 | pkcsBlockLen - hLen - 1, tmp, hLen, heap)) != 0) {
|
---|
| 1396 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1397 | return ret;
|
---|
| 1398 | }
|
---|
| 1399 |
|
---|
| 1400 | /* xor seedMask value with maskedSeed to get seed value */
|
---|
| 1401 | for (idx = 0; idx < (word32)hLen; idx++) {
|
---|
| 1402 | tmp[idx] = tmp[idx] ^ pkcsBlock[1 + idx];
|
---|
| 1403 | }
|
---|
| 1404 |
|
---|
| 1405 | /* get dbMask value */
|
---|
| 1406 | if ((ret = RsaMGF(mgf, tmp, hLen, tmp + hLen,
|
---|
| 1407 | pkcsBlockLen - hLen - 1, heap)) != 0) {
|
---|
| 1408 | XFREE(tmp, NULL, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1409 | return ret;
|
---|
| 1410 | }
|
---|
| 1411 |
|
---|
| 1412 | /* get DB value by doing maskedDB xor dbMask */
|
---|
| 1413 | for (idx = 0; idx < (pkcsBlockLen - hLen - 1); idx++) {
|
---|
| 1414 | pkcsBlock[hLen + 1 + idx] = pkcsBlock[hLen + 1 + idx] ^ tmp[idx + hLen];
|
---|
| 1415 | }
|
---|
| 1416 |
|
---|
| 1417 | /* done with use of tmp buffer */
|
---|
| 1418 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1419 |
|
---|
| 1420 | /* advance idx to index of PS and msg separator, account for PS size of 0*/
|
---|
| 1421 | idx = hLen + 1 + hLen;
|
---|
| 1422 | while (idx < pkcsBlockLen && pkcsBlock[idx] == 0) {idx++;}
|
---|
| 1423 |
|
---|
| 1424 | /* create hash of label for comparison with hash sent */
|
---|
| 1425 | if ((ret = wc_Hash(hType, optLabel, labelLen, h, hLen)) != 0) {
|
---|
| 1426 | return ret;
|
---|
| 1427 | }
|
---|
| 1428 |
|
---|
| 1429 | /* say no to chosen ciphertext attack.
|
---|
| 1430 | Comparison of lHash, Y, and separator value needs to all happen in
|
---|
| 1431 | constant time.
|
---|
| 1432 | Attackers should not be able to get error condition from the timing of
|
---|
| 1433 | these checks.
|
---|
| 1434 | */
|
---|
| 1435 | ret = 0;
|
---|
| 1436 | ret |= ConstantCompare(pkcsBlock + hLen + 1, h, hLen);
|
---|
| 1437 | ret += pkcsBlock[idx++] ^ 0x01; /* separator value is 0x01 */
|
---|
| 1438 | ret += pkcsBlock[0] ^ 0x00; /* Y, the first value, should be 0 */
|
---|
| 1439 |
|
---|
| 1440 | /* Return 0 data length on error. */
|
---|
| 1441 | idx = ctMaskSelInt(ctMaskEq(ret, 0), idx, pkcsBlockLen);
|
---|
| 1442 |
|
---|
| 1443 | /* adjust pointer to correct location in array and return size of M */
|
---|
| 1444 | *output = (byte*)(pkcsBlock + idx);
|
---|
| 1445 | return pkcsBlockLen - idx;
|
---|
| 1446 | }
|
---|
| 1447 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 1448 |
|
---|
| 1449 | #ifdef WC_RSA_PSS
|
---|
| 1450 | /* 0x00 .. 0x00 0x01 | Salt | Gen Hash | 0xbc
|
---|
| 1451 | * MGF over all bytes down to end of Salt
|
---|
| 1452 | *
|
---|
| 1453 | * pkcsBlock Buffer holding decrypted data.
|
---|
| 1454 | * pkcsBlockLen Length of buffer.
|
---|
| 1455 | * htype Hash function to use.
|
---|
| 1456 | * mgf Mask generation function.
|
---|
| 1457 | * saltLen Length of salt to put in padding.
|
---|
| 1458 | * bits Length of key in bits.
|
---|
| 1459 | * heap Used for dynamic memory allocation.
|
---|
| 1460 | * returns 0 on success, PSS_SALTLEN_E when the salt length is invalid,
|
---|
| 1461 | * BAD_PADDING_E when the padding is not valid, MEMORY_E when allocation fails
|
---|
| 1462 | * and other negative values on error.
|
---|
| 1463 | */
|
---|
| 1464 | static int RsaUnPad_PSS(byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
| 1465 | byte **output, enum wc_HashType hType, int mgf,
|
---|
| 1466 | int saltLen, int bits, void* heap)
|
---|
| 1467 | {
|
---|
| 1468 | int ret;
|
---|
| 1469 | byte* tmp;
|
---|
| 1470 | int hLen, i, maskLen;
|
---|
| 1471 | #ifdef WOLFSSL_SHA512
|
---|
| 1472 | int orig_bits = bits;
|
---|
| 1473 | #endif
|
---|
| 1474 | #if defined(WOLFSSL_NO_MALLOC) && !defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1475 | byte tmp_buf[RSA_MAX_SIZE/8];
|
---|
| 1476 | tmp = tmp_buf;
|
---|
| 1477 |
|
---|
| 1478 | if (pkcsBlockLen > RSA_MAX_SIZE/8) {
|
---|
| 1479 | return MEMORY_E;
|
---|
| 1480 | }
|
---|
| 1481 | #endif
|
---|
| 1482 |
|
---|
| 1483 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 1484 | if (hLen < 0)
|
---|
| 1485 | return hLen;
|
---|
| 1486 | bits = (bits - 1) & 0x7;
|
---|
| 1487 | if ((pkcsBlock[0] & (0xff << bits)) != 0) {
|
---|
| 1488 | return BAD_PADDING_E;
|
---|
| 1489 | }
|
---|
| 1490 | if (bits == 0) {
|
---|
| 1491 | pkcsBlock++;
|
---|
| 1492 | pkcsBlockLen--;
|
---|
| 1493 | }
|
---|
| 1494 | maskLen = (int)pkcsBlockLen - 1 - hLen;
|
---|
| 1495 | if (maskLen < 0) {
|
---|
| 1496 | WOLFSSL_MSG("RsaUnPad_PSS: Hash too large");
|
---|
| 1497 | return WC_KEY_SIZE_E;
|
---|
| 1498 | }
|
---|
| 1499 |
|
---|
| 1500 | if (saltLen == RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
| 1501 | saltLen = hLen;
|
---|
| 1502 | #ifdef WOLFSSL_SHA512
|
---|
| 1503 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
| 1504 | if (orig_bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE)
|
---|
| 1505 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
| 1506 | #endif
|
---|
| 1507 | }
|
---|
| 1508 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
| 1509 | else if (saltLen > hLen)
|
---|
| 1510 | return PSS_SALTLEN_E;
|
---|
| 1511 | #endif
|
---|
| 1512 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
| 1513 | else if (saltLen < RSA_PSS_SALT_LEN_DEFAULT)
|
---|
| 1514 | return PSS_SALTLEN_E;
|
---|
| 1515 | if (maskLen < saltLen + 1) {
|
---|
| 1516 | return PSS_SALTLEN_E;
|
---|
| 1517 | }
|
---|
| 1518 | #else
|
---|
| 1519 | else if (saltLen < RSA_PSS_SALT_LEN_DISCOVER)
|
---|
| 1520 | return PSS_SALTLEN_E;
|
---|
| 1521 | if (saltLen != RSA_PSS_SALT_LEN_DISCOVER && maskLen < saltLen + 1) {
|
---|
| 1522 | return WC_KEY_SIZE_E;
|
---|
| 1523 | }
|
---|
| 1524 | #endif
|
---|
| 1525 |
|
---|
| 1526 | if (pkcsBlock[pkcsBlockLen - 1] != RSA_PSS_PAD_TERM) {
|
---|
| 1527 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Term Error");
|
---|
| 1528 | return BAD_PADDING_E;
|
---|
| 1529 | }
|
---|
| 1530 |
|
---|
| 1531 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1532 | tmp = (byte*)XMALLOC(maskLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1533 | if (tmp == NULL) {
|
---|
| 1534 | return MEMORY_E;
|
---|
| 1535 | }
|
---|
| 1536 | #endif
|
---|
| 1537 |
|
---|
| 1538 | if ((ret = RsaMGF(mgf, pkcsBlock + maskLen, hLen, tmp, maskLen,
|
---|
| 1539 | heap)) != 0) {
|
---|
| 1540 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1541 | return ret;
|
---|
| 1542 | }
|
---|
| 1543 |
|
---|
| 1544 | tmp[0] &= (1 << bits) - 1;
|
---|
| 1545 | pkcsBlock[0] &= (1 << bits) - 1;
|
---|
| 1546 | #ifdef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
| 1547 | if (saltLen == RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
| 1548 | for (i = 0; i < maskLen - 1; i++) {
|
---|
| 1549 | if (tmp[i] != pkcsBlock[i]) {
|
---|
| 1550 | break;
|
---|
| 1551 | }
|
---|
| 1552 | }
|
---|
| 1553 | if (tmp[i] != (pkcsBlock[i] ^ 0x01)) {
|
---|
| 1554 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1555 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error Match");
|
---|
| 1556 | return PSS_SALTLEN_RECOVER_E;
|
---|
| 1557 | }
|
---|
| 1558 | saltLen = maskLen - (i + 1);
|
---|
| 1559 | }
|
---|
| 1560 | else
|
---|
| 1561 | #endif
|
---|
| 1562 | {
|
---|
| 1563 | for (i = 0; i < maskLen - 1 - saltLen; i++) {
|
---|
| 1564 | if (tmp[i] != pkcsBlock[i]) {
|
---|
| 1565 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1566 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error Match");
|
---|
| 1567 | return PSS_SALTLEN_E;
|
---|
| 1568 | }
|
---|
| 1569 | }
|
---|
| 1570 | if (tmp[i] != (pkcsBlock[i] ^ 0x01)) {
|
---|
| 1571 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1572 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error End");
|
---|
| 1573 | return PSS_SALTLEN_E;
|
---|
| 1574 | }
|
---|
| 1575 | }
|
---|
| 1576 | for (i++; i < maskLen; i++)
|
---|
| 1577 | pkcsBlock[i] ^= tmp[i];
|
---|
| 1578 |
|
---|
| 1579 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
| 1580 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 1581 | #endif
|
---|
| 1582 |
|
---|
| 1583 | *output = pkcsBlock + maskLen - saltLen;
|
---|
| 1584 | return saltLen + hLen;
|
---|
| 1585 | }
|
---|
| 1586 | #endif
|
---|
| 1587 |
|
---|
| 1588 | /* UnPad plaintext, set start to *output, return length of plaintext,
|
---|
| 1589 | * < 0 on error */
|
---|
| 1590 | static int RsaUnPad(const byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
| 1591 | byte **output, byte padValue)
|
---|
| 1592 | {
|
---|
| 1593 | int ret = BAD_FUNC_ARG;
|
---|
| 1594 | word16 i;
|
---|
| 1595 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 1596 | byte invalid = 0;
|
---|
| 1597 | #endif
|
---|
| 1598 |
|
---|
| 1599 | if (output == NULL || pkcsBlockLen == 0 || pkcsBlockLen > 0xFFFF) {
|
---|
| 1600 | return BAD_FUNC_ARG;
|
---|
| 1601 | }
|
---|
| 1602 |
|
---|
| 1603 | if (padValue == RSA_BLOCK_TYPE_1) {
|
---|
| 1604 | /* First byte must be 0x00 and Second byte, block type, 0x01 */
|
---|
| 1605 | if (pkcsBlock[0] != 0 || pkcsBlock[1] != RSA_BLOCK_TYPE_1) {
|
---|
| 1606 | WOLFSSL_MSG("RsaUnPad error, invalid formatting");
|
---|
| 1607 | return RSA_PAD_E;
|
---|
| 1608 | }
|
---|
| 1609 |
|
---|
| 1610 | /* check the padding until we find the separator */
|
---|
| 1611 | for (i = 2; i < pkcsBlockLen && pkcsBlock[i++] == 0xFF; ) { }
|
---|
| 1612 |
|
---|
| 1613 | /* Minimum of 11 bytes of pre-message data and must have separator. */
|
---|
| 1614 | if (i < RSA_MIN_PAD_SZ || pkcsBlock[i-1] != 0) {
|
---|
| 1615 | WOLFSSL_MSG("RsaUnPad error, bad formatting");
|
---|
| 1616 | return RSA_PAD_E;
|
---|
| 1617 | }
|
---|
| 1618 |
|
---|
| 1619 | *output = (byte *)(pkcsBlock + i);
|
---|
| 1620 | ret = pkcsBlockLen - i;
|
---|
| 1621 | }
|
---|
| 1622 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 1623 | else {
|
---|
| 1624 | word16 j;
|
---|
| 1625 | word16 pastSep = 0;
|
---|
| 1626 |
|
---|
| 1627 | /* Decrypted with private key - unpad must be constant time. */
|
---|
| 1628 | for (i = 0, j = 2; j < pkcsBlockLen; j++) {
|
---|
| 1629 | /* Update i if not passed the separator and at separator. */
|
---|
| 1630 | i |= (~pastSep) & ctMask16Eq(pkcsBlock[j], 0x00) & (j + 1);
|
---|
| 1631 | pastSep |= ctMask16Eq(pkcsBlock[j], 0x00);
|
---|
| 1632 | }
|
---|
| 1633 |
|
---|
| 1634 | /* Minimum of 11 bytes of pre-message data - including leading 0x00. */
|
---|
| 1635 | invalid |= ctMaskLT(i, RSA_MIN_PAD_SZ);
|
---|
| 1636 | /* Must have seen separator. */
|
---|
| 1637 | invalid |= ~pastSep;
|
---|
| 1638 | /* First byte must be 0x00. */
|
---|
| 1639 | invalid |= ctMaskNotEq(pkcsBlock[0], 0x00);
|
---|
| 1640 | /* Check against expected block type: padValue */
|
---|
| 1641 | invalid |= ctMaskNotEq(pkcsBlock[1], padValue);
|
---|
| 1642 |
|
---|
| 1643 | *output = (byte *)(pkcsBlock + i);
|
---|
| 1644 | ret = ((int)~invalid) & (pkcsBlockLen - i);
|
---|
| 1645 | }
|
---|
| 1646 | #endif
|
---|
| 1647 |
|
---|
| 1648 | return ret;
|
---|
| 1649 | }
|
---|
| 1650 |
|
---|
| 1651 | /* helper function to direct unpadding
|
---|
| 1652 | *
|
---|
| 1653 | * bits is the key modulus size in bits
|
---|
| 1654 | */
|
---|
| 1655 | int wc_RsaUnPad_ex(byte* pkcsBlock, word32 pkcsBlockLen, byte** out,
|
---|
| 1656 | byte padValue, int padType, enum wc_HashType hType,
|
---|
| 1657 | int mgf, byte* optLabel, word32 labelLen, int saltLen,
|
---|
| 1658 | int bits, void* heap)
|
---|
| 1659 | {
|
---|
| 1660 | int ret;
|
---|
| 1661 |
|
---|
| 1662 | switch (padType) {
|
---|
| 1663 | case WC_RSA_PKCSV15_PAD:
|
---|
| 1664 | /*WOLFSSL_MSG("wolfSSL Using RSA PKCSV15 un-padding");*/
|
---|
| 1665 | ret = RsaUnPad(pkcsBlock, pkcsBlockLen, out, padValue);
|
---|
| 1666 | break;
|
---|
| 1667 |
|
---|
| 1668 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1669 | case WC_RSA_OAEP_PAD:
|
---|
| 1670 | WOLFSSL_MSG("wolfSSL Using RSA OAEP un-padding");
|
---|
| 1671 | ret = RsaUnPad_OAEP((byte*)pkcsBlock, pkcsBlockLen, out,
|
---|
| 1672 | hType, mgf, optLabel, labelLen, heap);
|
---|
| 1673 | break;
|
---|
| 1674 | #endif
|
---|
| 1675 |
|
---|
| 1676 | #ifdef WC_RSA_PSS
|
---|
| 1677 | case WC_RSA_PSS_PAD:
|
---|
| 1678 | WOLFSSL_MSG("wolfSSL Using RSA PSS un-padding");
|
---|
| 1679 | ret = RsaUnPad_PSS((byte*)pkcsBlock, pkcsBlockLen, out, hType, mgf,
|
---|
| 1680 | saltLen, bits, heap);
|
---|
| 1681 | break;
|
---|
| 1682 | #endif
|
---|
| 1683 |
|
---|
| 1684 | #ifdef WC_RSA_NO_PADDING
|
---|
| 1685 | case WC_RSA_NO_PAD:
|
---|
| 1686 | WOLFSSL_MSG("wolfSSL Using NO un-padding");
|
---|
| 1687 |
|
---|
| 1688 | /* In the case of no padding being used check that input is exactly
|
---|
| 1689 | * the RSA key length */
|
---|
| 1690 | if (bits <= 0 || pkcsBlockLen !=
|
---|
| 1691 | ((word32)(bits+WOLFSSL_BIT_SIZE-1)/WOLFSSL_BIT_SIZE)) {
|
---|
| 1692 | WOLFSSL_MSG("Bad input size");
|
---|
| 1693 | ret = RSA_PAD_E;
|
---|
| 1694 | }
|
---|
| 1695 | else {
|
---|
| 1696 | if (out != NULL) {
|
---|
| 1697 | *out = pkcsBlock;
|
---|
| 1698 | }
|
---|
| 1699 | ret = pkcsBlockLen;
|
---|
| 1700 | }
|
---|
| 1701 | break;
|
---|
| 1702 | #endif /* WC_RSA_NO_PADDING */
|
---|
| 1703 |
|
---|
| 1704 | default:
|
---|
| 1705 | WOLFSSL_MSG("Unknown RSA UnPad Type");
|
---|
| 1706 | ret = RSA_PAD_E;
|
---|
| 1707 | }
|
---|
| 1708 |
|
---|
| 1709 | /* silence warning if not used with padding scheme */
|
---|
| 1710 | (void)hType;
|
---|
| 1711 | (void)mgf;
|
---|
| 1712 | (void)optLabel;
|
---|
| 1713 | (void)labelLen;
|
---|
| 1714 | (void)saltLen;
|
---|
| 1715 | (void)bits;
|
---|
| 1716 | (void)heap;
|
---|
| 1717 |
|
---|
| 1718 | return ret;
|
---|
| 1719 | }
|
---|
| 1720 |
|
---|
| 1721 | #if defined(WOLFSSL_XILINX_CRYPT)
|
---|
| 1722 | /*
|
---|
| 1723 | * Xilinx hardened crypto acceleration.
|
---|
| 1724 | *
|
---|
| 1725 | * Returns 0 on success and negative values on error.
|
---|
| 1726 | */
|
---|
| 1727 | static int wc_RsaFunctionXil(const byte* in, word32 inLen, byte* out,
|
---|
| 1728 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 1729 | {
|
---|
| 1730 | int ret = 0;
|
---|
| 1731 | word32 keyLen;
|
---|
| 1732 | (void)rng;
|
---|
| 1733 |
|
---|
| 1734 | keyLen = wc_RsaEncryptSize(key);
|
---|
| 1735 | if (keyLen > *outLen) {
|
---|
| 1736 | WOLFSSL_MSG("Output buffer is not big enough");
|
---|
| 1737 | return BAD_FUNC_ARG;
|
---|
| 1738 | }
|
---|
| 1739 |
|
---|
| 1740 | if (inLen != keyLen) {
|
---|
| 1741 | WOLFSSL_MSG("Expected that inLen equals RSA key length");
|
---|
| 1742 | return BAD_FUNC_ARG;
|
---|
| 1743 | }
|
---|
| 1744 |
|
---|
| 1745 | switch(type) {
|
---|
| 1746 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1747 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1748 | /* Currently public exponent is loaded by default.
|
---|
| 1749 | * In SDK 2017.1 RSA exponent values are expected to be of 4 bytes
|
---|
| 1750 | * leading to private key operations with Xsecure_RsaDecrypt not being
|
---|
| 1751 | * supported */
|
---|
| 1752 | ret = RSA_WRONG_TYPE_E;
|
---|
| 1753 | break;
|
---|
| 1754 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1755 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1756 | if (XSecure_RsaDecrypt(&(key->xRsa), in, out) != XST_SUCCESS) {
|
---|
| 1757 | ret = BAD_STATE_E;
|
---|
| 1758 | }
|
---|
| 1759 | break;
|
---|
| 1760 | default:
|
---|
| 1761 | ret = RSA_WRONG_TYPE_E;
|
---|
| 1762 | }
|
---|
| 1763 |
|
---|
| 1764 | *outLen = keyLen;
|
---|
| 1765 |
|
---|
| 1766 | return ret;
|
---|
| 1767 | }
|
---|
| 1768 | #endif /* WOLFSSL_XILINX_CRYPT */
|
---|
| 1769 |
|
---|
| 1770 | #ifdef WC_RSA_NONBLOCK
|
---|
| 1771 | static int wc_RsaFunctionNonBlock(const byte* in, word32 inLen, byte* out,
|
---|
| 1772 | word32* outLen, int type, RsaKey* key)
|
---|
| 1773 | {
|
---|
| 1774 | int ret = 0;
|
---|
| 1775 | word32 keyLen, len;
|
---|
| 1776 |
|
---|
| 1777 | if (key == NULL || key->nb == NULL) {
|
---|
| 1778 | return BAD_FUNC_ARG;
|
---|
| 1779 | }
|
---|
| 1780 |
|
---|
| 1781 | if (key->nb->exptmod.state == TFM_EXPTMOD_NB_INIT) {
|
---|
| 1782 | if (mp_init(&key->nb->tmp) != MP_OKAY) {
|
---|
| 1783 | ret = MP_INIT_E;
|
---|
| 1784 | }
|
---|
| 1785 |
|
---|
| 1786 | if (ret == 0) {
|
---|
| 1787 | if (mp_read_unsigned_bin(&key->nb->tmp, (byte*)in, inLen) != MP_OKAY) {
|
---|
| 1788 | ret = MP_READ_E;
|
---|
| 1789 | }
|
---|
| 1790 | }
|
---|
| 1791 | }
|
---|
| 1792 |
|
---|
| 1793 | if (ret == 0) {
|
---|
| 1794 | switch(type) {
|
---|
| 1795 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1796 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1797 | ret = fp_exptmod_nb(&key->nb->exptmod, &key->nb->tmp, &key->d,
|
---|
| 1798 | &key->n, &key->nb->tmp);
|
---|
| 1799 | if (ret == FP_WOULDBLOCK)
|
---|
| 1800 | return ret;
|
---|
| 1801 | if (ret != MP_OKAY)
|
---|
| 1802 | ret = MP_EXPTMOD_E;
|
---|
| 1803 | break;
|
---|
| 1804 |
|
---|
| 1805 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1806 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1807 | ret = fp_exptmod_nb(&key->nb->exptmod, &key->nb->tmp, &key->e,
|
---|
| 1808 | &key->n, &key->nb->tmp);
|
---|
| 1809 | if (ret == FP_WOULDBLOCK)
|
---|
| 1810 | return ret;
|
---|
| 1811 | if (ret != MP_OKAY)
|
---|
| 1812 | ret = MP_EXPTMOD_E;
|
---|
| 1813 | break;
|
---|
| 1814 | default:
|
---|
| 1815 | ret = RSA_WRONG_TYPE_E;
|
---|
| 1816 | break;
|
---|
| 1817 | }
|
---|
| 1818 | }
|
---|
| 1819 |
|
---|
| 1820 | if (ret == 0) {
|
---|
| 1821 | keyLen = wc_RsaEncryptSize(key);
|
---|
| 1822 | if (keyLen > *outLen)
|
---|
| 1823 | ret = RSA_BUFFER_E;
|
---|
| 1824 | }
|
---|
| 1825 | if (ret == 0) {
|
---|
| 1826 | len = mp_unsigned_bin_size(&key->nb->tmp);
|
---|
| 1827 |
|
---|
| 1828 | /* pad front w/ zeros to match key length */
|
---|
| 1829 | while (len < keyLen) {
|
---|
| 1830 | *out++ = 0x00;
|
---|
| 1831 | len++;
|
---|
| 1832 | }
|
---|
| 1833 |
|
---|
| 1834 | *outLen = keyLen;
|
---|
| 1835 |
|
---|
| 1836 | /* convert */
|
---|
| 1837 | if (mp_to_unsigned_bin(&key->nb->tmp, out) != MP_OKAY) {
|
---|
| 1838 | ret = MP_TO_E;
|
---|
| 1839 | }
|
---|
| 1840 | }
|
---|
| 1841 |
|
---|
| 1842 | mp_clear(&key->nb->tmp);
|
---|
| 1843 |
|
---|
| 1844 | return ret;
|
---|
| 1845 | }
|
---|
| 1846 | #endif /* WC_RSA_NONBLOCK */
|
---|
| 1847 |
|
---|
| 1848 | #ifdef WOLFSSL_AFALG_XILINX_RSA
|
---|
| 1849 | #ifndef ERROR_OUT
|
---|
| 1850 | #define ERROR_OUT(x) ret = (x); goto done
|
---|
| 1851 | #endif
|
---|
| 1852 |
|
---|
| 1853 | static const char WC_TYPE_ASYMKEY[] = "skcipher";
|
---|
| 1854 | static const char WC_NAME_RSA[] = "xilinx-zynqmp-rsa";
|
---|
| 1855 | #ifndef MAX_XILINX_RSA_KEY
|
---|
| 1856 | /* max key size of 4096 bits / 512 bytes */
|
---|
| 1857 | #define MAX_XILINX_RSA_KEY 512
|
---|
| 1858 | #endif
|
---|
| 1859 | static const byte XILINX_RSA_FLAG[] = {0x1};
|
---|
| 1860 |
|
---|
| 1861 |
|
---|
| 1862 | /* AF_ALG implementation of RSA */
|
---|
| 1863 | static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
|
---|
| 1864 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 1865 | {
|
---|
| 1866 | struct msghdr msg;
|
---|
| 1867 | struct cmsghdr* cmsg;
|
---|
| 1868 | struct iovec iov;
|
---|
| 1869 | byte* keyBuf = NULL;
|
---|
| 1870 | word32 keyBufSz = 0;
|
---|
| 1871 | char cbuf[CMSG_SPACE(4) + CMSG_SPACE(sizeof(struct af_alg_iv) + 1)] = {0};
|
---|
| 1872 | int ret = 0;
|
---|
| 1873 | int op = 0; /* decryption vs encryption flag */
|
---|
| 1874 | word32 keyLen;
|
---|
| 1875 |
|
---|
| 1876 | /* input and output buffer need to be aligned */
|
---|
| 1877 | ALIGN64 byte outBuf[MAX_XILINX_RSA_KEY];
|
---|
| 1878 | ALIGN64 byte inBuf[MAX_XILINX_RSA_KEY];
|
---|
| 1879 |
|
---|
| 1880 | XMEMSET(&msg, 0, sizeof(struct msghdr));
|
---|
| 1881 | (void)rng;
|
---|
| 1882 |
|
---|
| 1883 | keyLen = wc_RsaEncryptSize(key);
|
---|
| 1884 | if (keyLen > *outLen) {
|
---|
| 1885 | ERROR_OUT(RSA_BUFFER_E);
|
---|
| 1886 | }
|
---|
| 1887 |
|
---|
| 1888 | if (keyLen > MAX_XILINX_RSA_KEY) {
|
---|
| 1889 | WOLFSSL_MSG("RSA key size larger than supported");
|
---|
| 1890 | ERROR_OUT(BAD_FUNC_ARG);
|
---|
| 1891 | }
|
---|
| 1892 |
|
---|
| 1893 | if ((keyBuf = (byte*)XMALLOC(keyLen * 2, key->heap, DYNAMIC_TYPE_KEY))
|
---|
| 1894 | == NULL) {
|
---|
| 1895 | ERROR_OUT(MEMORY_E);
|
---|
| 1896 | }
|
---|
| 1897 |
|
---|
| 1898 | if ((ret = mp_to_unsigned_bin(&(key->n), keyBuf)) != MP_OKAY) {
|
---|
| 1899 | ERROR_OUT(MP_TO_E);
|
---|
| 1900 | }
|
---|
| 1901 |
|
---|
| 1902 | switch(type) {
|
---|
| 1903 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1904 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1905 | op = 1; /* set as decrypt */
|
---|
| 1906 | {
|
---|
| 1907 | keyBufSz = mp_unsigned_bin_size(&(key->d));
|
---|
| 1908 | if ((mp_to_unsigned_bin(&(key->d), keyBuf + keyLen))
|
---|
| 1909 | != MP_OKAY) {
|
---|
| 1910 | ERROR_OUT(MP_TO_E);
|
---|
| 1911 | }
|
---|
| 1912 | }
|
---|
| 1913 | break;
|
---|
| 1914 |
|
---|
| 1915 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1916 | case RSA_PUBLIC_ENCRYPT: {
|
---|
| 1917 | word32 exp = 0;
|
---|
| 1918 | word32 eSz = mp_unsigned_bin_size(&(key->e));
|
---|
| 1919 | if ((mp_to_unsigned_bin(&(key->e), (byte*)&exp +
|
---|
| 1920 | (sizeof(word32) - eSz))) != MP_OKAY) {
|
---|
| 1921 | ERROR_OUT(MP_TO_E);
|
---|
| 1922 | }
|
---|
| 1923 | keyBufSz = sizeof(word32);
|
---|
| 1924 | XMEMCPY(keyBuf + keyLen, (byte*)&exp, keyBufSz);
|
---|
| 1925 | break;
|
---|
| 1926 | }
|
---|
| 1927 |
|
---|
| 1928 | default:
|
---|
| 1929 | ERROR_OUT(RSA_WRONG_TYPE_E);
|
---|
| 1930 | }
|
---|
| 1931 | keyBufSz += keyLen; /* add size of modulus */
|
---|
| 1932 |
|
---|
| 1933 | /* check for existing sockets before creating new ones */
|
---|
| 1934 | if (key->alFd > 0) {
|
---|
| 1935 | close(key->alFd);
|
---|
| 1936 | key->alFd = WC_SOCK_NOTSET;
|
---|
| 1937 | }
|
---|
| 1938 | if (key->rdFd > 0) {
|
---|
| 1939 | close(key->rdFd);
|
---|
| 1940 | key->rdFd = WC_SOCK_NOTSET;
|
---|
| 1941 | }
|
---|
| 1942 |
|
---|
| 1943 | /* create new sockets and set the key to use */
|
---|
| 1944 | if ((key->alFd = wc_Afalg_Socket()) < 0) {
|
---|
| 1945 | WOLFSSL_MSG("Unable to create socket");
|
---|
| 1946 | ERROR_OUT(key->alFd);
|
---|
| 1947 | }
|
---|
| 1948 | if ((key->rdFd = wc_Afalg_CreateRead(key->alFd, WC_TYPE_ASYMKEY,
|
---|
| 1949 | WC_NAME_RSA)) < 0) {
|
---|
| 1950 | WOLFSSL_MSG("Unable to bind and create read/send socket");
|
---|
| 1951 | ERROR_OUT(key->rdFd);
|
---|
| 1952 | }
|
---|
| 1953 | if ((ret = setsockopt(key->alFd, SOL_ALG, ALG_SET_KEY, keyBuf,
|
---|
| 1954 | keyBufSz)) < 0) {
|
---|
| 1955 | WOLFSSL_MSG("Error setting RSA key");
|
---|
| 1956 | ERROR_OUT(ret);
|
---|
| 1957 | }
|
---|
| 1958 |
|
---|
| 1959 | msg.msg_control = cbuf;
|
---|
| 1960 | msg.msg_controllen = sizeof(cbuf);
|
---|
| 1961 | cmsg = CMSG_FIRSTHDR(&msg);
|
---|
| 1962 | if ((ret = wc_Afalg_SetOp(cmsg, op)) < 0) {
|
---|
| 1963 | ERROR_OUT(ret);
|
---|
| 1964 | }
|
---|
| 1965 |
|
---|
| 1966 | /* set flag in IV spot, needed for Xilinx hardware acceleration use */
|
---|
| 1967 | cmsg = CMSG_NXTHDR(&msg, cmsg);
|
---|
| 1968 | if ((ret = wc_Afalg_SetIv(cmsg, (byte*)XILINX_RSA_FLAG,
|
---|
| 1969 | sizeof(XILINX_RSA_FLAG))) != 0) {
|
---|
| 1970 | ERROR_OUT(ret);
|
---|
| 1971 | }
|
---|
| 1972 |
|
---|
| 1973 | /* compose and send msg */
|
---|
| 1974 | XMEMCPY(inBuf, (byte*)in, inLen); /* for alignment */
|
---|
| 1975 | iov.iov_base = inBuf;
|
---|
| 1976 | iov.iov_len = inLen;
|
---|
| 1977 | msg.msg_iov = &iov;
|
---|
| 1978 | msg.msg_iovlen = 1;
|
---|
| 1979 | if ((ret = sendmsg(key->rdFd, &msg, 0)) <= 0) {
|
---|
| 1980 | ERROR_OUT(WC_AFALG_SOCK_E);
|
---|
| 1981 | }
|
---|
| 1982 |
|
---|
| 1983 | if ((ret = read(key->rdFd, outBuf, inLen)) <= 0) {
|
---|
| 1984 | ERROR_OUT(WC_AFALG_SOCK_E);
|
---|
| 1985 | }
|
---|
| 1986 | XMEMCPY(out, outBuf, ret);
|
---|
| 1987 | *outLen = keyLen;
|
---|
| 1988 |
|
---|
| 1989 | done:
|
---|
| 1990 | /* clear key data and free buffer */
|
---|
| 1991 | if (keyBuf != NULL) {
|
---|
| 1992 | ForceZero(keyBuf, keyBufSz);
|
---|
| 1993 | }
|
---|
| 1994 | XFREE(keyBuf, key->heap, DYNAMIC_TYPE_KEY);
|
---|
| 1995 |
|
---|
| 1996 | if (key->alFd > 0) {
|
---|
| 1997 | close(key->alFd);
|
---|
| 1998 | key->alFd = WC_SOCK_NOTSET;
|
---|
| 1999 | }
|
---|
| 2000 | if (key->rdFd > 0) {
|
---|
| 2001 | close(key->rdFd);
|
---|
| 2002 | key->rdFd = WC_SOCK_NOTSET;
|
---|
| 2003 | }
|
---|
| 2004 |
|
---|
| 2005 | return ret;
|
---|
| 2006 | }
|
---|
| 2007 |
|
---|
| 2008 | #else
|
---|
| 2009 | static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
|
---|
| 2010 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 2011 | {
|
---|
| 2012 | #ifndef WOLFSSL_SP_MATH
|
---|
| 2013 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2014 | mp_int* tmp;
|
---|
| 2015 | #ifdef WC_RSA_BLINDING
|
---|
| 2016 | mp_int* rnd;
|
---|
| 2017 | mp_int* rndi;
|
---|
| 2018 | #endif
|
---|
| 2019 | #else
|
---|
| 2020 | mp_int tmp[1];
|
---|
| 2021 | #ifdef WC_RSA_BLINDING
|
---|
| 2022 | mp_int rnd[1], rndi[1];
|
---|
| 2023 | #endif
|
---|
| 2024 | #endif
|
---|
| 2025 | int ret = 0;
|
---|
| 2026 | word32 keyLen = 0;
|
---|
| 2027 | #endif
|
---|
| 2028 |
|
---|
| 2029 | #ifdef WOLFSSL_HAVE_SP_RSA
|
---|
| 2030 | #ifndef WOLFSSL_SP_NO_2048
|
---|
| 2031 | if (mp_count_bits(&key->n) == 2048) {
|
---|
| 2032 | switch(type) {
|
---|
| 2033 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 2034 | case RSA_PRIVATE_DECRYPT:
|
---|
| 2035 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 2036 | #ifdef WC_RSA_BLINDING
|
---|
| 2037 | if (rng == NULL)
|
---|
| 2038 | return MISSING_RNG_E;
|
---|
| 2039 | #endif
|
---|
| 2040 | #ifndef RSA_LOW_MEM
|
---|
| 2041 | return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 2042 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
| 2043 | out, outLen);
|
---|
| 2044 | #else
|
---|
| 2045 | return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 2046 | NULL, NULL, NULL, &key->n, out, outLen);
|
---|
| 2047 | #endif
|
---|
| 2048 | #endif
|
---|
| 2049 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 2050 | case RSA_PUBLIC_DECRYPT:
|
---|
| 2051 | return sp_RsaPublic_2048(in, inLen, &key->e, &key->n, out, outLen);
|
---|
| 2052 | }
|
---|
| 2053 | }
|
---|
| 2054 | #endif
|
---|
| 2055 | #ifndef WOLFSSL_SP_NO_3072
|
---|
| 2056 | if (mp_count_bits(&key->n) == 3072) {
|
---|
| 2057 | switch(type) {
|
---|
| 2058 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 2059 | case RSA_PRIVATE_DECRYPT:
|
---|
| 2060 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 2061 | #ifdef WC_RSA_BLINDING
|
---|
| 2062 | if (rng == NULL)
|
---|
| 2063 | return MISSING_RNG_E;
|
---|
| 2064 | #endif
|
---|
| 2065 | #ifndef RSA_LOW_MEM
|
---|
| 2066 | return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 2067 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
| 2068 | out, outLen);
|
---|
| 2069 | #else
|
---|
| 2070 | return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 2071 | NULL, NULL, NULL, &key->n, out, outLen);
|
---|
| 2072 | #endif
|
---|
| 2073 | #endif
|
---|
| 2074 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 2075 | case RSA_PUBLIC_DECRYPT:
|
---|
| 2076 | return sp_RsaPublic_3072(in, inLen, &key->e, &key->n, out, outLen);
|
---|
| 2077 | }
|
---|
| 2078 | }
|
---|
| 2079 | #endif
|
---|
| 2080 | #ifdef WOLFSSL_SP_4096
|
---|
| 2081 | if (mp_count_bits(&key->n) == 4096) {
|
---|
| 2082 | switch(type) {
|
---|
| 2083 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 2084 | case RSA_PRIVATE_DECRYPT:
|
---|
| 2085 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 2086 | #ifdef WC_RSA_BLINDING
|
---|
| 2087 | if (rng == NULL)
|
---|
| 2088 | return MISSING_RNG_E;
|
---|
| 2089 | #endif
|
---|
| 2090 | #ifndef RSA_LOW_MEM
|
---|
| 2091 | return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 2092 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
| 2093 | out, outLen);
|
---|
| 2094 | #else
|
---|
| 2095 | return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 2096 | NULL, NULL, NULL, &key->n, out, outLen);
|
---|
| 2097 | #endif
|
---|
| 2098 | #endif
|
---|
| 2099 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 2100 | case RSA_PUBLIC_DECRYPT:
|
---|
| 2101 | return sp_RsaPublic_4096(in, inLen, &key->e, &key->n, out, outLen);
|
---|
| 2102 | }
|
---|
| 2103 | }
|
---|
| 2104 | #endif
|
---|
| 2105 | #endif /* WOLFSSL_HAVE_SP_RSA */
|
---|
| 2106 |
|
---|
| 2107 | #ifdef WOLFSSL_SP_MATH
|
---|
| 2108 | (void)rng;
|
---|
| 2109 | WOLFSSL_MSG("SP Key Size Error");
|
---|
| 2110 | return WC_KEY_SIZE_E;
|
---|
| 2111 | #else
|
---|
| 2112 | (void)rng;
|
---|
| 2113 |
|
---|
| 2114 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2115 | tmp = (mp_int*)XMALLOC(sizeof(mp_int), key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2116 | if (tmp == NULL)
|
---|
| 2117 | return MEMORY_E;
|
---|
| 2118 | #ifdef WC_RSA_BLINDING
|
---|
| 2119 | rnd = (mp_int*)XMALLOC(sizeof(mp_int) * 2, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2120 | if (rnd == NULL) {
|
---|
| 2121 | XFREE(tmp, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2122 | return MEMORY_E;
|
---|
| 2123 | }
|
---|
| 2124 | rndi = rnd + 1;
|
---|
| 2125 | #endif /* WC_RSA_BLINDING */
|
---|
| 2126 | #endif /* WOLFSSL_SMALL_STACK */
|
---|
| 2127 |
|
---|
| 2128 | if (mp_init(tmp) != MP_OKAY)
|
---|
| 2129 | ret = MP_INIT_E;
|
---|
| 2130 |
|
---|
| 2131 | #ifdef WC_RSA_BLINDING
|
---|
| 2132 | if (ret == 0) {
|
---|
| 2133 | if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) {
|
---|
| 2134 | if (mp_init_multi(rnd, rndi, NULL, NULL, NULL, NULL) != MP_OKAY) {
|
---|
| 2135 | mp_clear(tmp);
|
---|
| 2136 | ret = MP_INIT_E;
|
---|
| 2137 | }
|
---|
| 2138 | }
|
---|
| 2139 | }
|
---|
| 2140 | #endif
|
---|
| 2141 |
|
---|
| 2142 | #ifndef TEST_UNPAD_CONSTANT_TIME
|
---|
| 2143 | if (ret == 0 && mp_read_unsigned_bin(tmp, (byte*)in, inLen) != MP_OKAY)
|
---|
| 2144 | ret = MP_READ_E;
|
---|
| 2145 |
|
---|
| 2146 | if (ret == 0) {
|
---|
| 2147 | switch(type) {
|
---|
| 2148 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 2149 | case RSA_PRIVATE_DECRYPT:
|
---|
| 2150 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 2151 | {
|
---|
| 2152 | #if defined(WC_RSA_BLINDING) && !defined(WC_NO_RNG)
|
---|
| 2153 | /* blind */
|
---|
| 2154 | ret = mp_rand(rnd, get_digit_count(&key->n), rng);
|
---|
| 2155 |
|
---|
| 2156 | /* rndi = 1/rnd mod n */
|
---|
| 2157 | if (ret == 0 && mp_invmod(rnd, &key->n, rndi) != MP_OKAY)
|
---|
| 2158 | ret = MP_INVMOD_E;
|
---|
| 2159 |
|
---|
| 2160 | /* rnd = rnd^e */
|
---|
| 2161 | if (ret == 0 && mp_exptmod(rnd, &key->e, &key->n, rnd) != MP_OKAY)
|
---|
| 2162 | ret = MP_EXPTMOD_E;
|
---|
| 2163 |
|
---|
| 2164 | /* tmp = tmp*rnd mod n */
|
---|
| 2165 | if (ret == 0 && mp_mulmod(tmp, rnd, &key->n, tmp) != MP_OKAY)
|
---|
| 2166 | ret = MP_MULMOD_E;
|
---|
| 2167 | #endif /* WC_RSA_BLINDING && !WC_NO_RNG */
|
---|
| 2168 |
|
---|
| 2169 | #ifdef RSA_LOW_MEM /* half as much memory but twice as slow */
|
---|
| 2170 | if (ret == 0 && mp_exptmod(tmp, &key->d, &key->n, tmp) != MP_OKAY)
|
---|
| 2171 | ret = MP_EXPTMOD_E;
|
---|
| 2172 | #else
|
---|
| 2173 | if (ret == 0) {
|
---|
| 2174 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2175 | mp_int* tmpa;
|
---|
| 2176 | mp_int* tmpb = NULL;
|
---|
| 2177 | #else
|
---|
| 2178 | mp_int tmpa[1], tmpb[1];
|
---|
| 2179 | #endif
|
---|
| 2180 | int cleara = 0, clearb = 0;
|
---|
| 2181 |
|
---|
| 2182 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2183 | tmpa = (mp_int*)XMALLOC(sizeof(mp_int) * 2,
|
---|
| 2184 | key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2185 | if (tmpa != NULL)
|
---|
| 2186 | tmpb = tmpa + 1;
|
---|
| 2187 | else
|
---|
| 2188 | ret = MEMORY_E;
|
---|
| 2189 | #endif
|
---|
| 2190 |
|
---|
| 2191 | if (ret == 0) {
|
---|
| 2192 | if (mp_init(tmpa) != MP_OKAY)
|
---|
| 2193 | ret = MP_INIT_E;
|
---|
| 2194 | else
|
---|
| 2195 | cleara = 1;
|
---|
| 2196 | }
|
---|
| 2197 |
|
---|
| 2198 | if (ret == 0) {
|
---|
| 2199 | if (mp_init(tmpb) != MP_OKAY)
|
---|
| 2200 | ret = MP_INIT_E;
|
---|
| 2201 | else
|
---|
| 2202 | clearb = 1;
|
---|
| 2203 | }
|
---|
| 2204 |
|
---|
| 2205 | /* tmpa = tmp^dP mod p */
|
---|
| 2206 | if (ret == 0 && mp_exptmod(tmp, &key->dP, &key->p,
|
---|
| 2207 | tmpa) != MP_OKAY)
|
---|
| 2208 | ret = MP_EXPTMOD_E;
|
---|
| 2209 |
|
---|
| 2210 | /* tmpb = tmp^dQ mod q */
|
---|
| 2211 | if (ret == 0 && mp_exptmod(tmp, &key->dQ, &key->q,
|
---|
| 2212 | tmpb) != MP_OKAY)
|
---|
| 2213 | ret = MP_EXPTMOD_E;
|
---|
| 2214 |
|
---|
| 2215 | /* tmp = (tmpa - tmpb) * qInv (mod p) */
|
---|
| 2216 | if (ret == 0 && mp_sub(tmpa, tmpb, tmp) != MP_OKAY)
|
---|
| 2217 | ret = MP_SUB_E;
|
---|
| 2218 |
|
---|
| 2219 | if (ret == 0 && mp_mulmod(tmp, &key->u, &key->p,
|
---|
| 2220 | tmp) != MP_OKAY)
|
---|
| 2221 | ret = MP_MULMOD_E;
|
---|
| 2222 |
|
---|
| 2223 | /* tmp = tmpb + q * tmp */
|
---|
| 2224 | if (ret == 0 && mp_mul(tmp, &key->q, tmp) != MP_OKAY)
|
---|
| 2225 | ret = MP_MUL_E;
|
---|
| 2226 |
|
---|
| 2227 | if (ret == 0 && mp_add(tmp, tmpb, tmp) != MP_OKAY)
|
---|
| 2228 | ret = MP_ADD_E;
|
---|
| 2229 |
|
---|
| 2230 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2231 | if (tmpa != NULL)
|
---|
| 2232 | #endif
|
---|
| 2233 | {
|
---|
| 2234 | if (cleara)
|
---|
| 2235 | mp_clear(tmpa);
|
---|
| 2236 | if (clearb)
|
---|
| 2237 | mp_clear(tmpb);
|
---|
| 2238 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2239 | XFREE(tmpa, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2240 | #endif
|
---|
| 2241 | }
|
---|
| 2242 | } /* tmpa/b scope */
|
---|
| 2243 | #endif /* RSA_LOW_MEM */
|
---|
| 2244 |
|
---|
| 2245 | #ifdef WC_RSA_BLINDING
|
---|
| 2246 | /* unblind */
|
---|
| 2247 | if (ret == 0 && mp_mulmod(tmp, rndi, &key->n, tmp) != MP_OKAY)
|
---|
| 2248 | ret = MP_MULMOD_E;
|
---|
| 2249 | #endif /* WC_RSA_BLINDING */
|
---|
| 2250 |
|
---|
| 2251 | break;
|
---|
| 2252 | }
|
---|
| 2253 | #endif
|
---|
| 2254 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 2255 | case RSA_PUBLIC_DECRYPT:
|
---|
| 2256 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
| 2257 | ret = wc_RsaFunctionXil(in, inLen, out, outLen, type, key, rng);
|
---|
| 2258 | #else
|
---|
| 2259 | if (mp_exptmod_nct(tmp, &key->e, &key->n, tmp) != MP_OKAY)
|
---|
| 2260 | ret = MP_EXPTMOD_E;
|
---|
| 2261 | #endif
|
---|
| 2262 | break;
|
---|
| 2263 | default:
|
---|
| 2264 | ret = RSA_WRONG_TYPE_E;
|
---|
| 2265 | break;
|
---|
| 2266 | }
|
---|
| 2267 | }
|
---|
| 2268 |
|
---|
| 2269 | if (ret == 0) {
|
---|
| 2270 | keyLen = wc_RsaEncryptSize(key);
|
---|
| 2271 | if (keyLen > *outLen)
|
---|
| 2272 | ret = RSA_BUFFER_E;
|
---|
| 2273 | }
|
---|
| 2274 | if (ret == 0) {
|
---|
| 2275 | *outLen = keyLen;
|
---|
| 2276 | if (mp_to_unsigned_bin_len(tmp, out, keyLen) != MP_OKAY)
|
---|
| 2277 | ret = MP_TO_E;
|
---|
| 2278 | }
|
---|
| 2279 | #else
|
---|
| 2280 | (void)type;
|
---|
| 2281 | (void)key;
|
---|
| 2282 | (void)keyLen;
|
---|
| 2283 | XMEMCPY(out, in, inLen);
|
---|
| 2284 | *outLen = inLen;
|
---|
| 2285 | #endif
|
---|
| 2286 |
|
---|
| 2287 | mp_clear(tmp);
|
---|
| 2288 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2289 | XFREE(tmp, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2290 | #endif
|
---|
| 2291 | #ifdef WC_RSA_BLINDING
|
---|
| 2292 | if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) {
|
---|
| 2293 | mp_clear(rndi);
|
---|
| 2294 | mp_clear(rnd);
|
---|
| 2295 | }
|
---|
| 2296 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2297 | XFREE(rnd, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2298 | #endif
|
---|
| 2299 | #endif /* WC_RSA_BLINDING */
|
---|
| 2300 | return ret;
|
---|
| 2301 | #endif /* WOLFSSL_SP_MATH */
|
---|
| 2302 | }
|
---|
| 2303 | #endif
|
---|
| 2304 |
|
---|
| 2305 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
| 2306 | static int wc_RsaFunctionAsync(const byte* in, word32 inLen, byte* out,
|
---|
| 2307 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 2308 | {
|
---|
| 2309 | int ret = 0;
|
---|
| 2310 |
|
---|
| 2311 | (void)rng;
|
---|
| 2312 |
|
---|
| 2313 | #ifdef WOLFSSL_ASYNC_CRYPT_TEST
|
---|
| 2314 | if (wc_AsyncTestInit(&key->asyncDev, ASYNC_TEST_RSA_FUNC)) {
|
---|
| 2315 | WC_ASYNC_TEST* testDev = &key->asyncDev.test;
|
---|
| 2316 | testDev->rsaFunc.in = in;
|
---|
| 2317 | testDev->rsaFunc.inSz = inLen;
|
---|
| 2318 | testDev->rsaFunc.out = out;
|
---|
| 2319 | testDev->rsaFunc.outSz = outLen;
|
---|
| 2320 | testDev->rsaFunc.type = type;
|
---|
| 2321 | testDev->rsaFunc.key = key;
|
---|
| 2322 | testDev->rsaFunc.rng = rng;
|
---|
| 2323 | return WC_PENDING_E;
|
---|
| 2324 | }
|
---|
| 2325 | #endif /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
| 2326 |
|
---|
| 2327 | switch(type) {
|
---|
| 2328 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 2329 | case RSA_PRIVATE_DECRYPT:
|
---|
| 2330 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 2331 | #ifdef HAVE_CAVIUM
|
---|
| 2332 | key->dataLen = key->n.raw.len;
|
---|
| 2333 | ret = NitroxRsaExptMod(in, inLen,
|
---|
| 2334 | key->d.raw.buf, key->d.raw.len,
|
---|
| 2335 | key->n.raw.buf, key->n.raw.len,
|
---|
| 2336 | out, outLen, key);
|
---|
| 2337 | #elif defined(HAVE_INTEL_QA)
|
---|
| 2338 | #ifdef RSA_LOW_MEM
|
---|
| 2339 | ret = IntelQaRsaPrivate(&key->asyncDev, in, inLen,
|
---|
| 2340 | &key->d.raw, &key->n.raw,
|
---|
| 2341 | out, outLen);
|
---|
| 2342 | #else
|
---|
| 2343 | ret = IntelQaRsaCrtPrivate(&key->asyncDev, in, inLen,
|
---|
| 2344 | &key->p.raw, &key->q.raw,
|
---|
| 2345 | &key->dP.raw, &key->dQ.raw,
|
---|
| 2346 | &key->u.raw,
|
---|
| 2347 | out, outLen);
|
---|
| 2348 | #endif
|
---|
| 2349 | #else /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
| 2350 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
| 2351 | #endif
|
---|
| 2352 | break;
|
---|
| 2353 | #endif
|
---|
| 2354 |
|
---|
| 2355 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 2356 | case RSA_PUBLIC_DECRYPT:
|
---|
| 2357 | #ifdef HAVE_CAVIUM
|
---|
| 2358 | key->dataLen = key->n.raw.len;
|
---|
| 2359 | ret = NitroxRsaExptMod(in, inLen,
|
---|
| 2360 | key->e.raw.buf, key->e.raw.len,
|
---|
| 2361 | key->n.raw.buf, key->n.raw.len,
|
---|
| 2362 | out, outLen, key);
|
---|
| 2363 | #elif defined(HAVE_INTEL_QA)
|
---|
| 2364 | ret = IntelQaRsaPublic(&key->asyncDev, in, inLen,
|
---|
| 2365 | &key->e.raw, &key->n.raw,
|
---|
| 2366 | out, outLen);
|
---|
| 2367 | #else /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
| 2368 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
| 2369 | #endif
|
---|
| 2370 | break;
|
---|
| 2371 |
|
---|
| 2372 | default:
|
---|
| 2373 | ret = RSA_WRONG_TYPE_E;
|
---|
| 2374 | }
|
---|
| 2375 |
|
---|
| 2376 | return ret;
|
---|
| 2377 | }
|
---|
| 2378 | #endif /* WOLFSSL_ASYNC_CRYPT && WC_ASYNC_ENABLE_RSA */
|
---|
| 2379 |
|
---|
| 2380 | #if defined(WC_RSA_DIRECT) || defined(WC_RSA_NO_PADDING)
|
---|
| 2381 | /* Function that does the RSA operation directly with no padding.
|
---|
| 2382 | *
|
---|
| 2383 | * in buffer to do operation on
|
---|
| 2384 | * inLen length of input buffer
|
---|
| 2385 | * out buffer to hold results
|
---|
| 2386 | * outSz gets set to size of result buffer. Should be passed in as length
|
---|
| 2387 | * of out buffer. If the pointer "out" is null then outSz gets set to
|
---|
| 2388 | * the expected buffer size needed and LENGTH_ONLY_E gets returned.
|
---|
| 2389 | * key RSA key to use for encrypt/decrypt
|
---|
| 2390 | * type if using private or public key {RSA_PUBLIC_ENCRYPT,
|
---|
| 2391 | * RSA_PUBLIC_DECRYPT, RSA_PRIVATE_ENCRYPT, RSA_PRIVATE_DECRYPT}
|
---|
| 2392 | * rng wolfSSL RNG to use if needed
|
---|
| 2393 | *
|
---|
| 2394 | * returns size of result on success
|
---|
| 2395 | */
|
---|
| 2396 | int wc_RsaDirect(byte* in, word32 inLen, byte* out, word32* outSz,
|
---|
| 2397 | RsaKey* key, int type, WC_RNG* rng)
|
---|
| 2398 | {
|
---|
| 2399 | int ret;
|
---|
| 2400 |
|
---|
| 2401 | if (in == NULL || outSz == NULL || key == NULL) {
|
---|
| 2402 | return BAD_FUNC_ARG;
|
---|
| 2403 | }
|
---|
| 2404 |
|
---|
| 2405 | /* sanity check on type of RSA operation */
|
---|
| 2406 | switch (type) {
|
---|
| 2407 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 2408 | case RSA_PUBLIC_DECRYPT:
|
---|
| 2409 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 2410 | case RSA_PRIVATE_DECRYPT:
|
---|
| 2411 | break;
|
---|
| 2412 | default:
|
---|
| 2413 | WOLFSSL_MSG("Bad RSA type");
|
---|
| 2414 | return BAD_FUNC_ARG;
|
---|
| 2415 | }
|
---|
| 2416 |
|
---|
| 2417 | if ((ret = wc_RsaEncryptSize(key)) < 0) {
|
---|
| 2418 | return BAD_FUNC_ARG;
|
---|
| 2419 | }
|
---|
| 2420 |
|
---|
| 2421 | if (inLen != (word32)ret) {
|
---|
| 2422 | WOLFSSL_MSG("Bad input length. Should be RSA key size");
|
---|
| 2423 | return BAD_FUNC_ARG;
|
---|
| 2424 | }
|
---|
| 2425 |
|
---|
| 2426 | if (out == NULL) {
|
---|
| 2427 | *outSz = inLen;
|
---|
| 2428 | return LENGTH_ONLY_E;
|
---|
| 2429 | }
|
---|
| 2430 |
|
---|
| 2431 | switch (key->state) {
|
---|
| 2432 | case RSA_STATE_NONE:
|
---|
| 2433 | case RSA_STATE_ENCRYPT_PAD:
|
---|
| 2434 | case RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
| 2435 | case RSA_STATE_DECRYPT_EXPTMOD:
|
---|
| 2436 | case RSA_STATE_DECRYPT_UNPAD:
|
---|
| 2437 | key->state = (type == RSA_PRIVATE_ENCRYPT ||
|
---|
| 2438 | type == RSA_PUBLIC_ENCRYPT) ? RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
| 2439 | RSA_STATE_DECRYPT_EXPTMOD;
|
---|
| 2440 |
|
---|
| 2441 | key->dataLen = *outSz;
|
---|
| 2442 |
|
---|
| 2443 | ret = wc_RsaFunction(in, inLen, out, &key->dataLen, type, key, rng);
|
---|
| 2444 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
| 2445 | key->state = (type == RSA_PRIVATE_ENCRYPT ||
|
---|
| 2446 | type == RSA_PUBLIC_ENCRYPT) ? RSA_STATE_ENCRYPT_RES:
|
---|
| 2447 | RSA_STATE_DECRYPT_RES;
|
---|
| 2448 | }
|
---|
| 2449 | if (ret < 0) {
|
---|
| 2450 | break;
|
---|
| 2451 | }
|
---|
| 2452 |
|
---|
| 2453 | FALL_THROUGH;
|
---|
| 2454 |
|
---|
| 2455 | case RSA_STATE_ENCRYPT_RES:
|
---|
| 2456 | case RSA_STATE_DECRYPT_RES:
|
---|
| 2457 | ret = key->dataLen;
|
---|
| 2458 | break;
|
---|
| 2459 |
|
---|
| 2460 | default:
|
---|
| 2461 | ret = BAD_STATE_E;
|
---|
| 2462 | }
|
---|
| 2463 |
|
---|
| 2464 | /* if async pending then skip cleanup*/
|
---|
| 2465 | if (ret == WC_PENDING_E
|
---|
| 2466 | #ifdef WC_RSA_NONBLOCK
|
---|
| 2467 | || ret == FP_WOULDBLOCK
|
---|
| 2468 | #endif
|
---|
| 2469 | ) {
|
---|
| 2470 | return ret;
|
---|
| 2471 | }
|
---|
| 2472 |
|
---|
| 2473 | key->state = RSA_STATE_NONE;
|
---|
| 2474 | wc_RsaCleanup(key);
|
---|
| 2475 |
|
---|
| 2476 | return ret;
|
---|
| 2477 | }
|
---|
| 2478 | #endif /* WC_RSA_DIRECT || WC_RSA_NO_PADDING */
|
---|
| 2479 |
|
---|
| 2480 | #if defined(WOLFSSL_CRYPTOCELL)
|
---|
| 2481 | static int cc310_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out,
|
---|
| 2482 | word32 outLen, RsaKey* key)
|
---|
| 2483 | {
|
---|
| 2484 | CRYSError_t ret = 0;
|
---|
| 2485 | CRYS_RSAPrimeData_t primeData;
|
---|
| 2486 | int modulusSize = wc_RsaEncryptSize(key);
|
---|
| 2487 |
|
---|
| 2488 | /* The out buffer must be at least modulus size bytes long. */
|
---|
| 2489 | if (outLen < modulusSize)
|
---|
| 2490 | return BAD_FUNC_ARG;
|
---|
| 2491 |
|
---|
| 2492 | ret = CRYS_RSA_PKCS1v15_Encrypt(&wc_rndState,
|
---|
| 2493 | wc_rndGenVectFunc,
|
---|
| 2494 | &key->ctx.pubKey,
|
---|
| 2495 | &primeData,
|
---|
| 2496 | (byte*)in,
|
---|
| 2497 | inLen,
|
---|
| 2498 | out);
|
---|
| 2499 |
|
---|
| 2500 | if (ret != SA_SILIB_RET_OK){
|
---|
| 2501 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Encrypt failed");
|
---|
| 2502 | return -1;
|
---|
| 2503 | }
|
---|
| 2504 |
|
---|
| 2505 | return modulusSize;
|
---|
| 2506 | }
|
---|
| 2507 | static int cc310_RsaPublicDecrypt(const byte* in, word32 inLen, byte* out,
|
---|
| 2508 | word32 outLen, RsaKey* key)
|
---|
| 2509 | {
|
---|
| 2510 | CRYSError_t ret = 0;
|
---|
| 2511 | CRYS_RSAPrimeData_t primeData;
|
---|
| 2512 | uint16_t actualOutLen = outLen;
|
---|
| 2513 |
|
---|
| 2514 | ret = CRYS_RSA_PKCS1v15_Decrypt(&key->ctx.privKey,
|
---|
| 2515 | &primeData,
|
---|
| 2516 | (byte*)in,
|
---|
| 2517 | inLen,
|
---|
| 2518 | out,
|
---|
| 2519 | &actualOutLen);
|
---|
| 2520 |
|
---|
| 2521 | if (ret != SA_SILIB_RET_OK){
|
---|
| 2522 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Decrypt failed");
|
---|
| 2523 | return -1;
|
---|
| 2524 | }
|
---|
| 2525 | return actualOutLen;
|
---|
| 2526 | }
|
---|
| 2527 |
|
---|
| 2528 | int cc310_RsaSSL_Sign(const byte* in, word32 inLen, byte* out,
|
---|
| 2529 | word32 outLen, RsaKey* key, CRYS_RSA_HASH_OpMode_t mode)
|
---|
| 2530 | {
|
---|
| 2531 | CRYSError_t ret = 0;
|
---|
| 2532 | uint16_t actualOutLen = outLen*sizeof(byte);
|
---|
| 2533 | CRYS_RSAPrivUserContext_t contextPrivate;
|
---|
| 2534 |
|
---|
| 2535 | ret = CRYS_RSA_PKCS1v15_Sign(&wc_rndState,
|
---|
| 2536 | wc_rndGenVectFunc,
|
---|
| 2537 | &contextPrivate,
|
---|
| 2538 | &key->ctx.privKey,
|
---|
| 2539 | mode,
|
---|
| 2540 | (byte*)in,
|
---|
| 2541 | inLen,
|
---|
| 2542 | out,
|
---|
| 2543 | &actualOutLen);
|
---|
| 2544 |
|
---|
| 2545 | if (ret != SA_SILIB_RET_OK){
|
---|
| 2546 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Sign failed");
|
---|
| 2547 | return -1;
|
---|
| 2548 | }
|
---|
| 2549 | return actualOutLen;
|
---|
| 2550 | }
|
---|
| 2551 |
|
---|
| 2552 | int cc310_RsaSSL_Verify(const byte* in, word32 inLen, byte* sig,
|
---|
| 2553 | RsaKey* key, CRYS_RSA_HASH_OpMode_t mode)
|
---|
| 2554 | {
|
---|
| 2555 | CRYSError_t ret = 0;
|
---|
| 2556 | CRYS_RSAPubUserContext_t contextPub;
|
---|
| 2557 |
|
---|
| 2558 | /* verify the signature in the sig pointer */
|
---|
| 2559 | ret = CRYS_RSA_PKCS1v15_Verify(&contextPub,
|
---|
| 2560 | &key->ctx.pubKey,
|
---|
| 2561 | mode,
|
---|
| 2562 | (byte*)in,
|
---|
| 2563 | inLen,
|
---|
| 2564 | sig);
|
---|
| 2565 |
|
---|
| 2566 | if (ret != SA_SILIB_RET_OK){
|
---|
| 2567 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Verify failed");
|
---|
| 2568 | return -1;
|
---|
| 2569 | }
|
---|
| 2570 |
|
---|
| 2571 | return ret;
|
---|
| 2572 | }
|
---|
| 2573 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
| 2574 |
|
---|
| 2575 | int wc_RsaFunction(const byte* in, word32 inLen, byte* out,
|
---|
| 2576 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 2577 | {
|
---|
| 2578 | int ret = 0;
|
---|
| 2579 |
|
---|
| 2580 | if (key == NULL || in == NULL || inLen == 0 || out == NULL ||
|
---|
| 2581 | outLen == NULL || *outLen == 0 || type == RSA_TYPE_UNKNOWN) {
|
---|
| 2582 | return BAD_FUNC_ARG;
|
---|
| 2583 | }
|
---|
| 2584 |
|
---|
| 2585 | #ifdef WOLF_CRYPTO_CB
|
---|
| 2586 | if (key->devId != INVALID_DEVID) {
|
---|
| 2587 | ret = wc_CryptoCb_Rsa(in, inLen, out, outLen, type, key, rng);
|
---|
| 2588 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
| 2589 | return ret;
|
---|
| 2590 | /* fall-through when unavailable */
|
---|
| 2591 | ret = 0; /* reset error code and try using software */
|
---|
| 2592 | }
|
---|
| 2593 | #endif
|
---|
| 2594 |
|
---|
| 2595 | #ifndef TEST_UNPAD_CONSTANT_TIME
|
---|
| 2596 | #ifndef NO_RSA_BOUNDS_CHECK
|
---|
| 2597 | if (type == RSA_PRIVATE_DECRYPT &&
|
---|
| 2598 | key->state == RSA_STATE_DECRYPT_EXPTMOD) {
|
---|
| 2599 |
|
---|
| 2600 | /* Check that 1 < in < n-1. (Requirement of 800-56B.) */
|
---|
| 2601 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2602 | mp_int* c;
|
---|
| 2603 | #else
|
---|
| 2604 | mp_int c[1];
|
---|
| 2605 | #endif
|
---|
| 2606 |
|
---|
| 2607 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2608 | c = (mp_int*)XMALLOC(sizeof(mp_int), key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2609 | if (c == NULL)
|
---|
| 2610 | ret = MEMORY_E;
|
---|
| 2611 | #endif
|
---|
| 2612 |
|
---|
| 2613 | if (mp_init(c) != MP_OKAY)
|
---|
| 2614 | ret = MEMORY_E;
|
---|
| 2615 | if (ret == 0) {
|
---|
| 2616 | if (mp_read_unsigned_bin(c, in, inLen) != 0)
|
---|
| 2617 | ret = MP_READ_E;
|
---|
| 2618 | }
|
---|
| 2619 | if (ret == 0) {
|
---|
| 2620 | /* check c > 1 */
|
---|
| 2621 | if (mp_cmp_d(c, 1) != MP_GT)
|
---|
| 2622 | ret = RSA_OUT_OF_RANGE_E;
|
---|
| 2623 | }
|
---|
| 2624 | if (ret == 0) {
|
---|
| 2625 | /* add c+1 */
|
---|
| 2626 | if (mp_add_d(c, 1, c) != MP_OKAY)
|
---|
| 2627 | ret = MP_ADD_E;
|
---|
| 2628 | }
|
---|
| 2629 | if (ret == 0) {
|
---|
| 2630 | /* check c+1 < n */
|
---|
| 2631 | if (mp_cmp(c, &key->n) != MP_LT)
|
---|
| 2632 | ret = RSA_OUT_OF_RANGE_E;
|
---|
| 2633 | }
|
---|
| 2634 | mp_clear(c);
|
---|
| 2635 |
|
---|
| 2636 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 2637 | XFREE(c, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 2638 | #endif
|
---|
| 2639 |
|
---|
| 2640 | if (ret != 0)
|
---|
| 2641 | return ret;
|
---|
| 2642 | }
|
---|
| 2643 | #endif /* NO_RSA_BOUNDS_CHECK */
|
---|
| 2644 | #endif
|
---|
| 2645 |
|
---|
| 2646 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
| 2647 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
| 2648 | key->n.raw.len > 0) {
|
---|
| 2649 | ret = wc_RsaFunctionAsync(in, inLen, out, outLen, type, key, rng);
|
---|
| 2650 | }
|
---|
| 2651 | else
|
---|
| 2652 | #endif
|
---|
| 2653 | #ifdef WC_RSA_NONBLOCK
|
---|
| 2654 | if (key->nb) {
|
---|
| 2655 | ret = wc_RsaFunctionNonBlock(in, inLen, out, outLen, type, key);
|
---|
| 2656 | }
|
---|
| 2657 | else
|
---|
| 2658 | #endif
|
---|
| 2659 | {
|
---|
| 2660 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
| 2661 | }
|
---|
| 2662 |
|
---|
| 2663 | /* handle error */
|
---|
| 2664 | if (ret < 0 && ret != WC_PENDING_E
|
---|
| 2665 | #ifdef WC_RSA_NONBLOCK
|
---|
| 2666 | && ret != FP_WOULDBLOCK
|
---|
| 2667 | #endif
|
---|
| 2668 | ) {
|
---|
| 2669 | if (ret == MP_EXPTMOD_E) {
|
---|
| 2670 | /* This can happen due to incorrectly set FP_MAX_BITS or missing XREALLOC */
|
---|
| 2671 | WOLFSSL_MSG("RSA_FUNCTION MP_EXPTMOD_E: memory/config problem");
|
---|
| 2672 | }
|
---|
| 2673 |
|
---|
| 2674 | key->state = RSA_STATE_NONE;
|
---|
| 2675 | wc_RsaCleanup(key);
|
---|
| 2676 | }
|
---|
| 2677 |
|
---|
| 2678 | return ret;
|
---|
| 2679 | }
|
---|
| 2680 |
|
---|
| 2681 |
|
---|
| 2682 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 2683 | /* Internal Wrappers */
|
---|
| 2684 | /* Gives the option of choosing padding type
|
---|
| 2685 | in : input to be encrypted
|
---|
| 2686 | inLen: length of input buffer
|
---|
| 2687 | out: encrypted output
|
---|
| 2688 | outLen: length of encrypted output buffer
|
---|
| 2689 | key : wolfSSL initialized RSA key struct
|
---|
| 2690 | rng : wolfSSL initialized random number struct
|
---|
| 2691 | rsa_type : type of RSA: RSA_PUBLIC_ENCRYPT, RSA_PUBLIC_DECRYPT,
|
---|
| 2692 | RSA_PRIVATE_ENCRYPT or RSA_PRIVATE_DECRYPT
|
---|
| 2693 | pad_value: RSA_BLOCK_TYPE_1 or RSA_BLOCK_TYPE_2
|
---|
| 2694 | pad_type : type of padding: WC_RSA_PKCSV15_PAD, WC_RSA_OAEP_PAD,
|
---|
| 2695 | WC_RSA_NO_PAD or WC_RSA_PSS_PAD
|
---|
| 2696 | hash : type of hash algorithm to use found in wolfssl/wolfcrypt/hash.h
|
---|
| 2697 | mgf : type of mask generation function to use
|
---|
| 2698 | label : optional label
|
---|
| 2699 | labelSz : size of optional label buffer
|
---|
| 2700 | saltLen : Length of salt used in PSS
|
---|
| 2701 | rng : random number generator */
|
---|
| 2702 | static int RsaPublicEncryptEx(const byte* in, word32 inLen, byte* out,
|
---|
| 2703 | word32 outLen, RsaKey* key, int rsa_type,
|
---|
| 2704 | byte pad_value, int pad_type,
|
---|
| 2705 | enum wc_HashType hash, int mgf,
|
---|
| 2706 | byte* label, word32 labelSz, int saltLen,
|
---|
| 2707 | WC_RNG* rng)
|
---|
| 2708 | {
|
---|
| 2709 | int ret, sz;
|
---|
| 2710 |
|
---|
| 2711 | if (in == NULL || inLen == 0 || out == NULL || key == NULL) {
|
---|
| 2712 | return BAD_FUNC_ARG;
|
---|
| 2713 | }
|
---|
| 2714 |
|
---|
| 2715 | sz = wc_RsaEncryptSize(key);
|
---|
| 2716 | if (sz > (int)outLen) {
|
---|
| 2717 | return RSA_BUFFER_E;
|
---|
| 2718 | }
|
---|
| 2719 |
|
---|
| 2720 | if (sz < RSA_MIN_PAD_SZ) {
|
---|
| 2721 | return WC_KEY_SIZE_E;
|
---|
| 2722 | }
|
---|
| 2723 |
|
---|
| 2724 | if (inLen > (word32)(sz - RSA_MIN_PAD_SZ)) {
|
---|
| 2725 | #ifdef WC_RSA_NO_PADDING
|
---|
| 2726 | /* In the case that no padding is used the input length can and should
|
---|
| 2727 | * be the same size as the RSA key. */
|
---|
| 2728 | if (pad_type != WC_RSA_NO_PAD)
|
---|
| 2729 | #endif
|
---|
| 2730 | return RSA_BUFFER_E;
|
---|
| 2731 | }
|
---|
| 2732 |
|
---|
| 2733 | switch (key->state) {
|
---|
| 2734 | case RSA_STATE_NONE:
|
---|
| 2735 | case RSA_STATE_ENCRYPT_PAD:
|
---|
| 2736 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 2737 | defined(HAVE_CAVIUM)
|
---|
| 2738 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
| 2739 | pad_type != WC_RSA_PSS_PAD && key->n.raw.buf) {
|
---|
| 2740 | /* Async operations that include padding */
|
---|
| 2741 | if (rsa_type == RSA_PUBLIC_ENCRYPT &&
|
---|
| 2742 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
| 2743 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
| 2744 | key->dataLen = key->n.raw.len;
|
---|
| 2745 | return NitroxRsaPublicEncrypt(in, inLen, out, outLen, key);
|
---|
| 2746 | }
|
---|
| 2747 | else if (rsa_type == RSA_PRIVATE_ENCRYPT &&
|
---|
| 2748 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
| 2749 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
| 2750 | key->dataLen = key->n.raw.len;
|
---|
| 2751 | return NitroxRsaSSL_Sign(in, inLen, out, outLen, key);
|
---|
| 2752 | }
|
---|
| 2753 | }
|
---|
| 2754 | #elif defined(WOLFSSL_CRYPTOCELL)
|
---|
| 2755 | if (rsa_type == RSA_PUBLIC_ENCRYPT &&
|
---|
| 2756 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
| 2757 |
|
---|
| 2758 | return cc310_RsaPublicEncrypt(in, inLen, out, outLen, key);
|
---|
| 2759 | }
|
---|
| 2760 | else if (rsa_type == RSA_PRIVATE_ENCRYPT &&
|
---|
| 2761 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
| 2762 | return cc310_RsaSSL_Sign(in, inLen, out, outLen, key,
|
---|
| 2763 | cc310_hashModeRSA(hash, 0));
|
---|
| 2764 | }
|
---|
| 2765 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
| 2766 |
|
---|
| 2767 | key->state = RSA_STATE_ENCRYPT_PAD;
|
---|
| 2768 | ret = wc_RsaPad_ex(in, inLen, out, sz, pad_value, rng, pad_type, hash,
|
---|
| 2769 | mgf, label, labelSz, saltLen, mp_count_bits(&key->n),
|
---|
| 2770 | key->heap);
|
---|
| 2771 | if (ret < 0) {
|
---|
| 2772 | break;
|
---|
| 2773 | }
|
---|
| 2774 |
|
---|
| 2775 | key->state = RSA_STATE_ENCRYPT_EXPTMOD;
|
---|
| 2776 | FALL_THROUGH;
|
---|
| 2777 |
|
---|
| 2778 | case RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
| 2779 |
|
---|
| 2780 | key->dataLen = outLen;
|
---|
| 2781 | ret = wc_RsaFunction(out, sz, out, &key->dataLen, rsa_type, key, rng);
|
---|
| 2782 |
|
---|
| 2783 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
| 2784 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
| 2785 | }
|
---|
| 2786 | if (ret < 0) {
|
---|
| 2787 | break;
|
---|
| 2788 | }
|
---|
| 2789 |
|
---|
| 2790 | FALL_THROUGH;
|
---|
| 2791 |
|
---|
| 2792 | case RSA_STATE_ENCRYPT_RES:
|
---|
| 2793 | ret = key->dataLen;
|
---|
| 2794 | break;
|
---|
| 2795 |
|
---|
| 2796 | default:
|
---|
| 2797 | ret = BAD_STATE_E;
|
---|
| 2798 | break;
|
---|
| 2799 | }
|
---|
| 2800 |
|
---|
| 2801 | /* if async pending then return and skip done cleanup below */
|
---|
| 2802 | if (ret == WC_PENDING_E
|
---|
| 2803 | #ifdef WC_RSA_NONBLOCK
|
---|
| 2804 | || ret == FP_WOULDBLOCK
|
---|
| 2805 | #endif
|
---|
| 2806 | ) {
|
---|
| 2807 | return ret;
|
---|
| 2808 | }
|
---|
| 2809 |
|
---|
| 2810 | key->state = RSA_STATE_NONE;
|
---|
| 2811 | wc_RsaCleanup(key);
|
---|
| 2812 |
|
---|
| 2813 | return ret;
|
---|
| 2814 | }
|
---|
| 2815 |
|
---|
| 2816 | #endif
|
---|
| 2817 |
|
---|
| 2818 | /* Gives the option of choosing padding type
|
---|
| 2819 | in : input to be decrypted
|
---|
| 2820 | inLen: length of input buffer
|
---|
| 2821 | out: decrypted message
|
---|
| 2822 | outLen: length of decrypted message in bytes
|
---|
| 2823 | outPtr: optional inline output pointer (if provided doing inline)
|
---|
| 2824 | key : wolfSSL initialized RSA key struct
|
---|
| 2825 | rsa_type : type of RSA: RSA_PUBLIC_ENCRYPT, RSA_PUBLIC_DECRYPT,
|
---|
| 2826 | RSA_PRIVATE_ENCRYPT or RSA_PRIVATE_DECRYPT
|
---|
| 2827 | pad_value: RSA_BLOCK_TYPE_1 or RSA_BLOCK_TYPE_2
|
---|
| 2828 | pad_type : type of padding: WC_RSA_PKCSV15_PAD, WC_RSA_OAEP_PAD,
|
---|
| 2829 | WC_RSA_NO_PAD, WC_RSA_PSS_PAD
|
---|
| 2830 | hash : type of hash algorithm to use found in wolfssl/wolfcrypt/hash.h
|
---|
| 2831 | mgf : type of mask generation function to use
|
---|
| 2832 | label : optional label
|
---|
| 2833 | labelSz : size of optional label buffer
|
---|
| 2834 | saltLen : Length of salt used in PSS
|
---|
| 2835 | rng : random number generator */
|
---|
| 2836 | static int RsaPrivateDecryptEx(byte* in, word32 inLen, byte* out,
|
---|
| 2837 | word32 outLen, byte** outPtr, RsaKey* key,
|
---|
| 2838 | int rsa_type, byte pad_value, int pad_type,
|
---|
| 2839 | enum wc_HashType hash, int mgf,
|
---|
| 2840 | byte* label, word32 labelSz, int saltLen,
|
---|
| 2841 | WC_RNG* rng)
|
---|
| 2842 | {
|
---|
| 2843 | int ret = RSA_WRONG_TYPE_E;
|
---|
| 2844 | byte* pad = NULL;
|
---|
| 2845 |
|
---|
| 2846 | if (in == NULL || inLen == 0 || out == NULL || key == NULL) {
|
---|
| 2847 | return BAD_FUNC_ARG;
|
---|
| 2848 | }
|
---|
| 2849 |
|
---|
| 2850 | switch (key->state) {
|
---|
| 2851 | case RSA_STATE_NONE:
|
---|
| 2852 | key->dataLen = inLen;
|
---|
| 2853 |
|
---|
| 2854 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 2855 | defined(HAVE_CAVIUM)
|
---|
| 2856 | /* Async operations that include padding */
|
---|
| 2857 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
| 2858 | pad_type != WC_RSA_PSS_PAD) {
|
---|
| 2859 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 2860 | if (rsa_type == RSA_PRIVATE_DECRYPT &&
|
---|
| 2861 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
| 2862 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
| 2863 | key->data = NULL;
|
---|
| 2864 | return NitroxRsaPrivateDecrypt(in, inLen, out, &key->dataLen,
|
---|
| 2865 | key);
|
---|
| 2866 | #endif
|
---|
| 2867 | }
|
---|
| 2868 | else if (rsa_type == RSA_PUBLIC_DECRYPT &&
|
---|
| 2869 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
| 2870 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
| 2871 | key->data = NULL;
|
---|
| 2872 | return NitroxRsaSSL_Verify(in, inLen, out, &key->dataLen, key);
|
---|
| 2873 | }
|
---|
| 2874 | }
|
---|
| 2875 | #elif defined(WOLFSSL_CRYPTOCELL)
|
---|
| 2876 | if (rsa_type == RSA_PRIVATE_DECRYPT &&
|
---|
| 2877 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
| 2878 | ret = cc310_RsaPublicDecrypt(in, inLen, out, outLen, key);
|
---|
| 2879 | if (outPtr != NULL)
|
---|
| 2880 | *outPtr = out; /* for inline */
|
---|
| 2881 | return ret;
|
---|
| 2882 | }
|
---|
| 2883 | else if (rsa_type == RSA_PUBLIC_DECRYPT &&
|
---|
| 2884 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
| 2885 | return cc310_RsaSSL_Verify(in, inLen, out, key,
|
---|
| 2886 | cc310_hashModeRSA(hash, 0));
|
---|
| 2887 | }
|
---|
| 2888 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
| 2889 |
|
---|
| 2890 |
|
---|
| 2891 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
| 2892 | /* verify the tmp ptr is NULL, otherwise indicates bad state */
|
---|
| 2893 | if (key->data != NULL) {
|
---|
| 2894 | ret = BAD_STATE_E;
|
---|
| 2895 | break;
|
---|
| 2896 | }
|
---|
| 2897 |
|
---|
| 2898 | /* if not doing this inline then allocate a buffer for it */
|
---|
| 2899 | if (outPtr == NULL) {
|
---|
| 2900 | key->data = (byte*)XMALLOC(inLen, key->heap,
|
---|
| 2901 | DYNAMIC_TYPE_WOLF_BIGINT);
|
---|
| 2902 | key->dataIsAlloc = 1;
|
---|
| 2903 | if (key->data == NULL) {
|
---|
| 2904 | ret = MEMORY_E;
|
---|
| 2905 | break;
|
---|
| 2906 | }
|
---|
| 2907 | XMEMCPY(key->data, in, inLen);
|
---|
| 2908 | }
|
---|
| 2909 | else {
|
---|
| 2910 | key->data = out;
|
---|
| 2911 | }
|
---|
| 2912 | #endif
|
---|
| 2913 |
|
---|
| 2914 | key->state = RSA_STATE_DECRYPT_EXPTMOD;
|
---|
| 2915 | FALL_THROUGH;
|
---|
| 2916 |
|
---|
| 2917 | case RSA_STATE_DECRYPT_EXPTMOD:
|
---|
| 2918 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
| 2919 | ret = wc_RsaFunction(key->data, inLen, key->data, &key->dataLen,
|
---|
| 2920 | rsa_type, key, rng);
|
---|
| 2921 | #else
|
---|
| 2922 | ret = wc_RsaFunction(in, inLen, out, &key->dataLen, rsa_type, key, rng);
|
---|
| 2923 | #endif
|
---|
| 2924 |
|
---|
| 2925 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
| 2926 | key->state = RSA_STATE_DECRYPT_UNPAD;
|
---|
| 2927 | }
|
---|
| 2928 | if (ret < 0) {
|
---|
| 2929 | break;
|
---|
| 2930 | }
|
---|
| 2931 |
|
---|
| 2932 | FALL_THROUGH;
|
---|
| 2933 |
|
---|
| 2934 | case RSA_STATE_DECRYPT_UNPAD:
|
---|
| 2935 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
| 2936 | ret = wc_RsaUnPad_ex(key->data, key->dataLen, &pad, pad_value, pad_type,
|
---|
| 2937 | hash, mgf, label, labelSz, saltLen,
|
---|
| 2938 | mp_count_bits(&key->n), key->heap);
|
---|
| 2939 | #else
|
---|
| 2940 | ret = wc_RsaUnPad_ex(out, key->dataLen, &pad, pad_value, pad_type, hash,
|
---|
| 2941 | mgf, label, labelSz, saltLen,
|
---|
| 2942 | mp_count_bits(&key->n), key->heap);
|
---|
| 2943 | #endif
|
---|
| 2944 | if (rsa_type == RSA_PUBLIC_DECRYPT && ret > (int)outLen)
|
---|
| 2945 | ret = RSA_BUFFER_E;
|
---|
| 2946 | else if (ret >= 0 && pad != NULL) {
|
---|
| 2947 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
| 2948 | signed char c;
|
---|
| 2949 | #endif
|
---|
| 2950 |
|
---|
| 2951 | /* only copy output if not inline */
|
---|
| 2952 | if (outPtr == NULL) {
|
---|
| 2953 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
| 2954 | if (rsa_type == RSA_PRIVATE_DECRYPT) {
|
---|
| 2955 | word32 i, j;
|
---|
| 2956 | int start = (int)((size_t)pad - (size_t)key->data);
|
---|
| 2957 |
|
---|
| 2958 | for (i = 0, j = 0; j < key->dataLen; j++) {
|
---|
| 2959 | out[i] = key->data[j];
|
---|
| 2960 | c = ctMaskGTE(j, start);
|
---|
| 2961 | c &= ctMaskLT(i, outLen);
|
---|
| 2962 | /* 0 - no add, -1 add */
|
---|
| 2963 | i += (word32)((byte)(-c));
|
---|
| 2964 | }
|
---|
| 2965 | }
|
---|
| 2966 | else
|
---|
| 2967 | #endif
|
---|
| 2968 | {
|
---|
| 2969 | XMEMCPY(out, pad, ret);
|
---|
| 2970 | }
|
---|
| 2971 | }
|
---|
| 2972 | else
|
---|
| 2973 | *outPtr = pad;
|
---|
| 2974 |
|
---|
| 2975 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY)
|
---|
| 2976 | ret = ctMaskSelInt(ctMaskLTE(ret, outLen), ret, RSA_BUFFER_E);
|
---|
| 2977 | ret = ctMaskSelInt(ctMaskNotEq(ret, 0), ret, RSA_BUFFER_E);
|
---|
| 2978 | #else
|
---|
| 2979 | if (outLen < (word32)ret)
|
---|
| 2980 | ret = RSA_BUFFER_E;
|
---|
| 2981 | #endif
|
---|
| 2982 | }
|
---|
| 2983 |
|
---|
| 2984 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
| 2985 | FALL_THROUGH;
|
---|
| 2986 |
|
---|
| 2987 | case RSA_STATE_DECRYPT_RES:
|
---|
| 2988 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 2989 | defined(HAVE_CAVIUM)
|
---|
| 2990 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
| 2991 | pad_type != WC_RSA_PSS_PAD) {
|
---|
| 2992 | if (ret > 0) {
|
---|
| 2993 | /* convert result */
|
---|
| 2994 | byte* dataLen = (byte*)&key->dataLen;
|
---|
| 2995 | ret = (dataLen[0] << 8) | (dataLen[1]);
|
---|
| 2996 |
|
---|
| 2997 | if (outPtr)
|
---|
| 2998 | *outPtr = in;
|
---|
| 2999 | }
|
---|
| 3000 | }
|
---|
| 3001 | #endif
|
---|
| 3002 | break;
|
---|
| 3003 |
|
---|
| 3004 | default:
|
---|
| 3005 | ret = BAD_STATE_E;
|
---|
| 3006 | break;
|
---|
| 3007 | }
|
---|
| 3008 |
|
---|
| 3009 | /* if async pending then return and skip done cleanup below */
|
---|
| 3010 | if (ret == WC_PENDING_E
|
---|
| 3011 | #ifdef WC_RSA_NONBLOCK
|
---|
| 3012 | || ret == FP_WOULDBLOCK
|
---|
| 3013 | #endif
|
---|
| 3014 | ) {
|
---|
| 3015 | return ret;
|
---|
| 3016 | }
|
---|
| 3017 |
|
---|
| 3018 | key->state = RSA_STATE_NONE;
|
---|
| 3019 | wc_RsaCleanup(key);
|
---|
| 3020 |
|
---|
| 3021 | return ret;
|
---|
| 3022 | }
|
---|
| 3023 |
|
---|
| 3024 |
|
---|
| 3025 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 3026 | /* Public RSA Functions */
|
---|
| 3027 | int wc_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3028 | RsaKey* key, WC_RNG* rng)
|
---|
| 3029 | {
|
---|
| 3030 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
| 3031 | RSA_PUBLIC_ENCRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
| 3032 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
| 3033 | }
|
---|
| 3034 |
|
---|
| 3035 |
|
---|
| 3036 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_NO_PADDING)
|
---|
| 3037 | int wc_RsaPublicEncrypt_ex(const byte* in, word32 inLen, byte* out,
|
---|
| 3038 | word32 outLen, RsaKey* key, WC_RNG* rng, int type,
|
---|
| 3039 | enum wc_HashType hash, int mgf, byte* label,
|
---|
| 3040 | word32 labelSz)
|
---|
| 3041 | {
|
---|
| 3042 | return RsaPublicEncryptEx(in, inLen, out, outLen, key, RSA_PUBLIC_ENCRYPT,
|
---|
| 3043 | RSA_BLOCK_TYPE_2, type, hash, mgf, label, labelSz, 0, rng);
|
---|
| 3044 | }
|
---|
| 3045 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 3046 | #endif
|
---|
| 3047 |
|
---|
| 3048 |
|
---|
| 3049 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 3050 | int wc_RsaPrivateDecryptInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
| 3051 | {
|
---|
| 3052 | WC_RNG* rng;
|
---|
| 3053 | #ifdef WC_RSA_BLINDING
|
---|
| 3054 | rng = key->rng;
|
---|
| 3055 | #else
|
---|
| 3056 | rng = NULL;
|
---|
| 3057 | #endif
|
---|
| 3058 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 3059 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
| 3060 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
| 3061 | }
|
---|
| 3062 |
|
---|
| 3063 |
|
---|
| 3064 | #ifndef WC_NO_RSA_OAEP
|
---|
| 3065 | int wc_RsaPrivateDecryptInline_ex(byte* in, word32 inLen, byte** out,
|
---|
| 3066 | RsaKey* key, int type, enum wc_HashType hash,
|
---|
| 3067 | int mgf, byte* label, word32 labelSz)
|
---|
| 3068 | {
|
---|
| 3069 | WC_RNG* rng;
|
---|
| 3070 | #ifdef WC_RSA_BLINDING
|
---|
| 3071 | rng = key->rng;
|
---|
| 3072 | #else
|
---|
| 3073 | rng = NULL;
|
---|
| 3074 | #endif
|
---|
| 3075 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 3076 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, type, hash,
|
---|
| 3077 | mgf, label, labelSz, 0, rng);
|
---|
| 3078 | }
|
---|
| 3079 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 3080 |
|
---|
| 3081 |
|
---|
| 3082 | int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out,
|
---|
| 3083 | word32 outLen, RsaKey* key)
|
---|
| 3084 | {
|
---|
| 3085 | WC_RNG* rng;
|
---|
| 3086 | #ifdef WC_RSA_BLINDING
|
---|
| 3087 | rng = key->rng;
|
---|
| 3088 | #else
|
---|
| 3089 | rng = NULL;
|
---|
| 3090 | #endif
|
---|
| 3091 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
| 3092 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
| 3093 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
| 3094 | }
|
---|
| 3095 |
|
---|
| 3096 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_NO_PADDING)
|
---|
| 3097 | int wc_RsaPrivateDecrypt_ex(const byte* in, word32 inLen, byte* out,
|
---|
| 3098 | word32 outLen, RsaKey* key, int type,
|
---|
| 3099 | enum wc_HashType hash, int mgf, byte* label,
|
---|
| 3100 | word32 labelSz)
|
---|
| 3101 | {
|
---|
| 3102 | WC_RNG* rng;
|
---|
| 3103 | #ifdef WC_RSA_BLINDING
|
---|
| 3104 | rng = key->rng;
|
---|
| 3105 | #else
|
---|
| 3106 | rng = NULL;
|
---|
| 3107 | #endif
|
---|
| 3108 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
| 3109 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, type, hash, mgf, label,
|
---|
| 3110 | labelSz, 0, rng);
|
---|
| 3111 | }
|
---|
| 3112 | #endif /* WC_NO_RSA_OAEP || WC_RSA_NO_PADDING */
|
---|
| 3113 | #endif /* WOLFSSL_RSA_PUBLIC_ONLY */
|
---|
| 3114 |
|
---|
| 3115 | #if !defined(WOLFSSL_CRYPTOCELL)
|
---|
| 3116 | int wc_RsaSSL_VerifyInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
| 3117 | {
|
---|
| 3118 | WC_RNG* rng;
|
---|
| 3119 | #ifdef WC_RSA_BLINDING
|
---|
| 3120 | rng = key->rng;
|
---|
| 3121 | #else
|
---|
| 3122 | rng = NULL;
|
---|
| 3123 | #endif
|
---|
| 3124 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 3125 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
| 3126 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
| 3127 | }
|
---|
| 3128 | #endif
|
---|
| 3129 |
|
---|
| 3130 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 3131 | int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3132 | RsaKey* key)
|
---|
| 3133 | {
|
---|
| 3134 | return wc_RsaSSL_Verify_ex(in, inLen, out, outLen, key , WC_RSA_PKCSV15_PAD);
|
---|
| 3135 | }
|
---|
| 3136 |
|
---|
| 3137 | int wc_RsaSSL_Verify_ex(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3138 | RsaKey* key, int pad_type)
|
---|
| 3139 | {
|
---|
| 3140 | WC_RNG* rng;
|
---|
| 3141 |
|
---|
| 3142 | if (key == NULL) {
|
---|
| 3143 | return BAD_FUNC_ARG;
|
---|
| 3144 | }
|
---|
| 3145 |
|
---|
| 3146 | #ifdef WC_RSA_BLINDING
|
---|
| 3147 | rng = key->rng;
|
---|
| 3148 | #else
|
---|
| 3149 | rng = NULL;
|
---|
| 3150 | #endif
|
---|
| 3151 |
|
---|
| 3152 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
| 3153 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, pad_type,
|
---|
| 3154 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
| 3155 | }
|
---|
| 3156 | #endif
|
---|
| 3157 |
|
---|
| 3158 | #ifdef WC_RSA_PSS
|
---|
| 3159 | /* Verify the message signed with RSA-PSS.
|
---|
| 3160 | * The input buffer is reused for the output buffer.
|
---|
| 3161 | * Salt length is equal to hash length.
|
---|
| 3162 | *
|
---|
| 3163 | * in Buffer holding encrypted data.
|
---|
| 3164 | * inLen Length of data in buffer.
|
---|
| 3165 | * out Pointer to address containing the PSS data.
|
---|
| 3166 | * hash Hash algorithm.
|
---|
| 3167 | * mgf Mask generation function.
|
---|
| 3168 | * key Public RSA key.
|
---|
| 3169 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
| 3170 | */
|
---|
| 3171 | int wc_RsaPSS_VerifyInline(byte* in, word32 inLen, byte** out,
|
---|
| 3172 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
| 3173 | {
|
---|
| 3174 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
| 3175 | return wc_RsaPSS_VerifyInline_ex(in, inLen, out, hash, mgf,
|
---|
| 3176 | RSA_PSS_SALT_LEN_DEFAULT, key);
|
---|
| 3177 | #else
|
---|
| 3178 | return wc_RsaPSS_VerifyInline_ex(in, inLen, out, hash, mgf,
|
---|
| 3179 | RSA_PSS_SALT_LEN_DISCOVER, key);
|
---|
| 3180 | #endif
|
---|
| 3181 | }
|
---|
| 3182 |
|
---|
| 3183 | /* Verify the message signed with RSA-PSS.
|
---|
| 3184 | * The input buffer is reused for the output buffer.
|
---|
| 3185 | *
|
---|
| 3186 | * in Buffer holding encrypted data.
|
---|
| 3187 | * inLen Length of data in buffer.
|
---|
| 3188 | * out Pointer to address containing the PSS data.
|
---|
| 3189 | * hash Hash algorithm.
|
---|
| 3190 | * mgf Mask generation function.
|
---|
| 3191 | * key Public RSA key.
|
---|
| 3192 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
| 3193 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
| 3194 | * indicates salt length is determined from the data.
|
---|
| 3195 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
| 3196 | */
|
---|
| 3197 | int wc_RsaPSS_VerifyInline_ex(byte* in, word32 inLen, byte** out,
|
---|
| 3198 | enum wc_HashType hash, int mgf, int saltLen,
|
---|
| 3199 | RsaKey* key)
|
---|
| 3200 | {
|
---|
| 3201 | WC_RNG* rng;
|
---|
| 3202 | #ifdef WC_RSA_BLINDING
|
---|
| 3203 | rng = key->rng;
|
---|
| 3204 | #else
|
---|
| 3205 | rng = NULL;
|
---|
| 3206 | #endif
|
---|
| 3207 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 3208 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
| 3209 | hash, mgf, NULL, 0, saltLen, rng);
|
---|
| 3210 | }
|
---|
| 3211 |
|
---|
| 3212 | /* Verify the message signed with RSA-PSS.
|
---|
| 3213 | * Salt length is equal to hash length.
|
---|
| 3214 | *
|
---|
| 3215 | * in Buffer holding encrypted data.
|
---|
| 3216 | * inLen Length of data in buffer.
|
---|
| 3217 | * out Pointer to address containing the PSS data.
|
---|
| 3218 | * hash Hash algorithm.
|
---|
| 3219 | * mgf Mask generation function.
|
---|
| 3220 | * key Public RSA key.
|
---|
| 3221 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
| 3222 | */
|
---|
| 3223 | int wc_RsaPSS_Verify(byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3224 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
| 3225 | {
|
---|
| 3226 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
| 3227 | return wc_RsaPSS_Verify_ex(in, inLen, out, outLen, hash, mgf,
|
---|
| 3228 | RSA_PSS_SALT_LEN_DEFAULT, key);
|
---|
| 3229 | #else
|
---|
| 3230 | return wc_RsaPSS_Verify_ex(in, inLen, out, outLen, hash, mgf,
|
---|
| 3231 | RSA_PSS_SALT_LEN_DISCOVER, key);
|
---|
| 3232 | #endif
|
---|
| 3233 | }
|
---|
| 3234 |
|
---|
| 3235 | /* Verify the message signed with RSA-PSS.
|
---|
| 3236 | *
|
---|
| 3237 | * in Buffer holding encrypted data.
|
---|
| 3238 | * inLen Length of data in buffer.
|
---|
| 3239 | * out Pointer to address containing the PSS data.
|
---|
| 3240 | * hash Hash algorithm.
|
---|
| 3241 | * mgf Mask generation function.
|
---|
| 3242 | * key Public RSA key.
|
---|
| 3243 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
| 3244 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
| 3245 | * indicates salt length is determined from the data.
|
---|
| 3246 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
| 3247 | */
|
---|
| 3248 | int wc_RsaPSS_Verify_ex(byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3249 | enum wc_HashType hash, int mgf, int saltLen,
|
---|
| 3250 | RsaKey* key)
|
---|
| 3251 | {
|
---|
| 3252 | WC_RNG* rng;
|
---|
| 3253 | #ifdef WC_RSA_BLINDING
|
---|
| 3254 | rng = key->rng;
|
---|
| 3255 | #else
|
---|
| 3256 | rng = NULL;
|
---|
| 3257 | #endif
|
---|
| 3258 | return RsaPrivateDecryptEx(in, inLen, out, outLen, NULL, key,
|
---|
| 3259 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
| 3260 | hash, mgf, NULL, 0, saltLen, rng);
|
---|
| 3261 | }
|
---|
| 3262 |
|
---|
| 3263 |
|
---|
| 3264 | /* Checks the PSS data to ensure that the signature matches.
|
---|
| 3265 | * Salt length is equal to hash length.
|
---|
| 3266 | *
|
---|
| 3267 | * in Hash of the data that is being verified.
|
---|
| 3268 | * inSz Length of hash.
|
---|
| 3269 | * sig Buffer holding PSS data.
|
---|
| 3270 | * sigSz Size of PSS data.
|
---|
| 3271 | * hashType Hash algorithm.
|
---|
| 3272 | * returns BAD_PADDING_E when the PSS data is invalid, BAD_FUNC_ARG when
|
---|
| 3273 | * NULL is passed in to in or sig or inSz is not the same as the hash
|
---|
| 3274 | * algorithm length and 0 on success.
|
---|
| 3275 | */
|
---|
| 3276 | int wc_RsaPSS_CheckPadding(const byte* in, word32 inSz, byte* sig,
|
---|
| 3277 | word32 sigSz, enum wc_HashType hashType)
|
---|
| 3278 | {
|
---|
| 3279 | return wc_RsaPSS_CheckPadding_ex(in, inSz, sig, sigSz, hashType, inSz, 0);
|
---|
| 3280 | }
|
---|
| 3281 |
|
---|
| 3282 | /* Checks the PSS data to ensure that the signature matches.
|
---|
| 3283 | *
|
---|
| 3284 | * in Hash of the data that is being verified.
|
---|
| 3285 | * inSz Length of hash.
|
---|
| 3286 | * sig Buffer holding PSS data.
|
---|
| 3287 | * sigSz Size of PSS data.
|
---|
| 3288 | * hashType Hash algorithm.
|
---|
| 3289 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
| 3290 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
| 3291 | * indicates salt length is determined from the data.
|
---|
| 3292 | * returns BAD_PADDING_E when the PSS data is invalid, BAD_FUNC_ARG when
|
---|
| 3293 | * NULL is passed in to in or sig or inSz is not the same as the hash
|
---|
| 3294 | * algorithm length and 0 on success.
|
---|
| 3295 | */
|
---|
| 3296 | int wc_RsaPSS_CheckPadding_ex(const byte* in, word32 inSz, byte* sig,
|
---|
| 3297 | word32 sigSz, enum wc_HashType hashType,
|
---|
| 3298 | int saltLen, int bits)
|
---|
| 3299 | {
|
---|
| 3300 | int ret = 0;
|
---|
| 3301 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
| 3302 | byte sigCheck[WC_MAX_DIGEST_SIZE*2 + RSA_PSS_PAD_SZ];
|
---|
| 3303 | #else
|
---|
| 3304 | byte *sigCheck = NULL;
|
---|
| 3305 | #endif
|
---|
| 3306 |
|
---|
| 3307 | (void)bits;
|
---|
| 3308 |
|
---|
| 3309 | if (in == NULL || sig == NULL ||
|
---|
| 3310 | inSz != (word32)wc_HashGetDigestSize(hashType)) {
|
---|
| 3311 | ret = BAD_FUNC_ARG;
|
---|
| 3312 | }
|
---|
| 3313 |
|
---|
| 3314 | if (ret == 0) {
|
---|
| 3315 | if (saltLen == RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
| 3316 | saltLen = inSz;
|
---|
| 3317 | #ifdef WOLFSSL_SHA512
|
---|
| 3318 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
| 3319 | if (bits == 1024 && inSz == WC_SHA512_DIGEST_SIZE) {
|
---|
| 3320 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
| 3321 | }
|
---|
| 3322 | #endif
|
---|
| 3323 | }
|
---|
| 3324 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
| 3325 | else if ((word32)saltLen > inSz) {
|
---|
| 3326 | ret = PSS_SALTLEN_E;
|
---|
| 3327 | }
|
---|
| 3328 | #endif
|
---|
| 3329 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
| 3330 | else if (saltLen < RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
| 3331 | ret = PSS_SALTLEN_E;
|
---|
| 3332 | }
|
---|
| 3333 | #else
|
---|
| 3334 | else if (saltLen == RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
| 3335 | saltLen = sigSz - inSz;
|
---|
| 3336 | if (saltLen < 0) {
|
---|
| 3337 | ret = PSS_SALTLEN_E;
|
---|
| 3338 | }
|
---|
| 3339 | }
|
---|
| 3340 | else if (saltLen < RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
| 3341 | ret = PSS_SALTLEN_E;
|
---|
| 3342 | }
|
---|
| 3343 | #endif
|
---|
| 3344 | }
|
---|
| 3345 |
|
---|
| 3346 | /* Sig = Salt | Exp Hash */
|
---|
| 3347 | if (ret == 0) {
|
---|
| 3348 | if (sigSz != inSz + saltLen) {
|
---|
| 3349 | ret = PSS_SALTLEN_E;
|
---|
| 3350 | }
|
---|
| 3351 | }
|
---|
| 3352 |
|
---|
| 3353 | #ifdef WOLFSSL_PSS_LONG_SALT
|
---|
| 3354 | if (ret == 0) {
|
---|
| 3355 | sigCheck = (byte*)XMALLOC(RSA_PSS_PAD_SZ + inSz + saltLen, NULL,
|
---|
| 3356 | DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 3357 | if (sigCheck == NULL) {
|
---|
| 3358 | ret = MEMORY_E;
|
---|
| 3359 | }
|
---|
| 3360 | }
|
---|
| 3361 | #endif
|
---|
| 3362 |
|
---|
| 3363 | /* Exp Hash = HASH(8 * 0x00 | Message Hash | Salt) */
|
---|
| 3364 | if (ret == 0) {
|
---|
| 3365 | XMEMSET(sigCheck, 0, RSA_PSS_PAD_SZ);
|
---|
| 3366 | XMEMCPY(sigCheck + RSA_PSS_PAD_SZ, in, inSz);
|
---|
| 3367 | XMEMCPY(sigCheck + RSA_PSS_PAD_SZ + inSz, sig, saltLen);
|
---|
| 3368 | ret = wc_Hash(hashType, sigCheck, RSA_PSS_PAD_SZ + inSz + saltLen,
|
---|
| 3369 | sigCheck, inSz);
|
---|
| 3370 | }
|
---|
| 3371 | if (ret == 0) {
|
---|
| 3372 | if (XMEMCMP(sigCheck, sig + saltLen, inSz) != 0) {
|
---|
| 3373 | WOLFSSL_MSG("RsaPSS_CheckPadding: Padding Error");
|
---|
| 3374 | ret = BAD_PADDING_E;
|
---|
| 3375 | }
|
---|
| 3376 | }
|
---|
| 3377 |
|
---|
| 3378 | #ifdef WOLFSSL_PSS_LONG_SALT
|
---|
| 3379 | if (sigCheck != NULL) {
|
---|
| 3380 | XFREE(sigCheck, NULL, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 3381 | }
|
---|
| 3382 | #endif
|
---|
| 3383 | return ret;
|
---|
| 3384 | }
|
---|
| 3385 |
|
---|
| 3386 |
|
---|
| 3387 | /* Verify the message signed with RSA-PSS.
|
---|
| 3388 | * The input buffer is reused for the output buffer.
|
---|
| 3389 | * Salt length is equal to hash length.
|
---|
| 3390 | *
|
---|
| 3391 | * in Buffer holding encrypted data.
|
---|
| 3392 | * inLen Length of data in buffer.
|
---|
| 3393 | * out Pointer to address containing the PSS data.
|
---|
| 3394 | * digest Hash of the data that is being verified.
|
---|
| 3395 | * digestLen Length of hash.
|
---|
| 3396 | * hash Hash algorithm.
|
---|
| 3397 | * mgf Mask generation function.
|
---|
| 3398 | * key Public RSA key.
|
---|
| 3399 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
| 3400 | */
|
---|
| 3401 | int wc_RsaPSS_VerifyCheckInline(byte* in, word32 inLen, byte** out,
|
---|
| 3402 | const byte* digest, word32 digestLen,
|
---|
| 3403 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
| 3404 | {
|
---|
| 3405 | int ret = 0, verify, saltLen, hLen, bits = 0;
|
---|
| 3406 |
|
---|
| 3407 | hLen = wc_HashGetDigestSize(hash);
|
---|
| 3408 | if (hLen < 0)
|
---|
| 3409 | return hLen;
|
---|
| 3410 | if ((word32)hLen != digestLen)
|
---|
| 3411 | return BAD_FUNC_ARG;
|
---|
| 3412 |
|
---|
| 3413 | saltLen = hLen;
|
---|
| 3414 | #ifdef WOLFSSL_SHA512
|
---|
| 3415 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
| 3416 | bits = mp_count_bits(&key->n);
|
---|
| 3417 | if (bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE)
|
---|
| 3418 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
| 3419 | #endif
|
---|
| 3420 |
|
---|
| 3421 | verify = wc_RsaPSS_VerifyInline_ex(in, inLen, out, hash, mgf, saltLen, key);
|
---|
| 3422 | if (verify > 0)
|
---|
| 3423 | ret = wc_RsaPSS_CheckPadding_ex(digest, digestLen, *out, verify,
|
---|
| 3424 | hash, saltLen, bits);
|
---|
| 3425 | if (ret == 0)
|
---|
| 3426 | ret = verify;
|
---|
| 3427 |
|
---|
| 3428 | return ret;
|
---|
| 3429 | }
|
---|
| 3430 |
|
---|
| 3431 |
|
---|
| 3432 | /* Verify the message signed with RSA-PSS.
|
---|
| 3433 | * Salt length is equal to hash length.
|
---|
| 3434 | *
|
---|
| 3435 | * in Buffer holding encrypted data.
|
---|
| 3436 | * inLen Length of data in buffer.
|
---|
| 3437 | * out Pointer to address containing the PSS data.
|
---|
| 3438 | * outLen Length of the output.
|
---|
| 3439 | * digest Hash of the data that is being verified.
|
---|
| 3440 | * digestLen Length of hash.
|
---|
| 3441 | * hash Hash algorithm.
|
---|
| 3442 | * mgf Mask generation function.
|
---|
| 3443 | * key Public RSA key.
|
---|
| 3444 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
| 3445 | */
|
---|
| 3446 | int wc_RsaPSS_VerifyCheck(byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3447 | const byte* digest, word32 digestLen,
|
---|
| 3448 | enum wc_HashType hash, int mgf,
|
---|
| 3449 | RsaKey* key)
|
---|
| 3450 | {
|
---|
| 3451 | int ret = 0, verify, saltLen, hLen, bits = 0;
|
---|
| 3452 |
|
---|
| 3453 | hLen = wc_HashGetDigestSize(hash);
|
---|
| 3454 | if (hLen < 0)
|
---|
| 3455 | return hLen;
|
---|
| 3456 | if ((word32)hLen != digestLen)
|
---|
| 3457 | return BAD_FUNC_ARG;
|
---|
| 3458 |
|
---|
| 3459 | saltLen = hLen;
|
---|
| 3460 | #ifdef WOLFSSL_SHA512
|
---|
| 3461 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
| 3462 | bits = mp_count_bits(&key->n);
|
---|
| 3463 | if (bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE)
|
---|
| 3464 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
| 3465 | #endif
|
---|
| 3466 |
|
---|
| 3467 | verify = wc_RsaPSS_Verify_ex(in, inLen, out, outLen, hash,
|
---|
| 3468 | mgf, saltLen, key);
|
---|
| 3469 | if (verify > 0)
|
---|
| 3470 | ret = wc_RsaPSS_CheckPadding_ex(digest, digestLen, out, verify,
|
---|
| 3471 | hash, saltLen, bits);
|
---|
| 3472 | if (ret == 0)
|
---|
| 3473 | ret = verify;
|
---|
| 3474 |
|
---|
| 3475 | return ret;
|
---|
| 3476 | }
|
---|
| 3477 |
|
---|
| 3478 | #endif
|
---|
| 3479 |
|
---|
| 3480 | #if !defined(WOLFSSL_RSA_PUBLIC_ONLY) && !defined(WOLFSSL_RSA_VERIFY_ONLY)
|
---|
| 3481 | int wc_RsaSSL_Sign(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3482 | RsaKey* key, WC_RNG* rng)
|
---|
| 3483 | {
|
---|
| 3484 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
| 3485 | RSA_PRIVATE_ENCRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
| 3486 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
| 3487 | }
|
---|
| 3488 |
|
---|
| 3489 | #ifdef WC_RSA_PSS
|
---|
| 3490 | /* Sign the hash of a message using RSA-PSS.
|
---|
| 3491 | * Salt length is equal to hash length.
|
---|
| 3492 | *
|
---|
| 3493 | * in Buffer holding hash of message.
|
---|
| 3494 | * inLen Length of data in buffer (hash length).
|
---|
| 3495 | * out Buffer to write encrypted signature into.
|
---|
| 3496 | * outLen Size of buffer to write to.
|
---|
| 3497 | * hash Hash algorithm.
|
---|
| 3498 | * mgf Mask generation function.
|
---|
| 3499 | * key Public RSA key.
|
---|
| 3500 | * rng Random number generator.
|
---|
| 3501 | * returns the length of the encrypted signature on success, a negative value
|
---|
| 3502 | * indicates failure.
|
---|
| 3503 | */
|
---|
| 3504 | int wc_RsaPSS_Sign(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3505 | enum wc_HashType hash, int mgf, RsaKey* key, WC_RNG* rng)
|
---|
| 3506 | {
|
---|
| 3507 | return wc_RsaPSS_Sign_ex(in, inLen, out, outLen, hash, mgf,
|
---|
| 3508 | RSA_PSS_SALT_LEN_DEFAULT, key, rng);
|
---|
| 3509 | }
|
---|
| 3510 |
|
---|
| 3511 | /* Sign the hash of a message using RSA-PSS.
|
---|
| 3512 | *
|
---|
| 3513 | * in Buffer holding hash of message.
|
---|
| 3514 | * inLen Length of data in buffer (hash length).
|
---|
| 3515 | * out Buffer to write encrypted signature into.
|
---|
| 3516 | * outLen Size of buffer to write to.
|
---|
| 3517 | * hash Hash algorithm.
|
---|
| 3518 | * mgf Mask generation function.
|
---|
| 3519 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
| 3520 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
| 3521 | * indicates salt length is determined from the data.
|
---|
| 3522 | * key Public RSA key.
|
---|
| 3523 | * rng Random number generator.
|
---|
| 3524 | * returns the length of the encrypted signature on success, a negative value
|
---|
| 3525 | * indicates failure.
|
---|
| 3526 | */
|
---|
| 3527 | int wc_RsaPSS_Sign_ex(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 3528 | enum wc_HashType hash, int mgf, int saltLen, RsaKey* key,
|
---|
| 3529 | WC_RNG* rng)
|
---|
| 3530 | {
|
---|
| 3531 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
| 3532 | RSA_PRIVATE_ENCRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
| 3533 | hash, mgf, NULL, 0, saltLen, rng);
|
---|
| 3534 | }
|
---|
| 3535 | #endif
|
---|
| 3536 | #endif
|
---|
| 3537 |
|
---|
| 3538 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) || !defined(WOLFSSL_SP_MATH) || \
|
---|
| 3539 | defined(WC_RSA_PSS)
|
---|
| 3540 | int wc_RsaEncryptSize(RsaKey* key)
|
---|
| 3541 | {
|
---|
| 3542 | int ret;
|
---|
| 3543 |
|
---|
| 3544 | if (key == NULL) {
|
---|
| 3545 | return BAD_FUNC_ARG;
|
---|
| 3546 | }
|
---|
| 3547 |
|
---|
| 3548 | ret = mp_unsigned_bin_size(&key->n);
|
---|
| 3549 |
|
---|
| 3550 | #ifdef WOLF_CRYPTO_CB
|
---|
| 3551 | if (ret == 0 && key->devId != INVALID_DEVID) {
|
---|
| 3552 | ret = 2048/8; /* hardware handles, use 2048-bit as default */
|
---|
| 3553 | }
|
---|
| 3554 | #endif
|
---|
| 3555 |
|
---|
| 3556 | return ret;
|
---|
| 3557 | }
|
---|
| 3558 | #endif
|
---|
| 3559 |
|
---|
| 3560 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 3561 | /* flatten RsaKey structure into individual elements (e, n) */
|
---|
| 3562 | int wc_RsaFlattenPublicKey(RsaKey* key, byte* e, word32* eSz, byte* n,
|
---|
| 3563 | word32* nSz)
|
---|
| 3564 | {
|
---|
| 3565 | int sz, ret;
|
---|
| 3566 |
|
---|
| 3567 | if (key == NULL || e == NULL || eSz == NULL || n == NULL || nSz == NULL) {
|
---|
| 3568 | return BAD_FUNC_ARG;
|
---|
| 3569 | }
|
---|
| 3570 |
|
---|
| 3571 | sz = mp_unsigned_bin_size(&key->e);
|
---|
| 3572 | if ((word32)sz > *eSz)
|
---|
| 3573 | return RSA_BUFFER_E;
|
---|
| 3574 | ret = mp_to_unsigned_bin(&key->e, e);
|
---|
| 3575 | if (ret != MP_OKAY)
|
---|
| 3576 | return ret;
|
---|
| 3577 | *eSz = (word32)sz;
|
---|
| 3578 |
|
---|
| 3579 | sz = wc_RsaEncryptSize(key);
|
---|
| 3580 | if ((word32)sz > *nSz)
|
---|
| 3581 | return RSA_BUFFER_E;
|
---|
| 3582 | ret = mp_to_unsigned_bin(&key->n, n);
|
---|
| 3583 | if (ret != MP_OKAY)
|
---|
| 3584 | return ret;
|
---|
| 3585 | *nSz = (word32)sz;
|
---|
| 3586 |
|
---|
| 3587 | return 0;
|
---|
| 3588 | }
|
---|
| 3589 | #endif
|
---|
| 3590 |
|
---|
| 3591 | #endif /* HAVE_FIPS */
|
---|
| 3592 |
|
---|
| 3593 |
|
---|
| 3594 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
| 3595 | static int RsaGetValue(mp_int* in, byte* out, word32* outSz)
|
---|
| 3596 | {
|
---|
| 3597 | word32 sz;
|
---|
| 3598 | int ret = 0;
|
---|
| 3599 |
|
---|
| 3600 | /* Parameters ensured by calling function. */
|
---|
| 3601 |
|
---|
| 3602 | sz = (word32)mp_unsigned_bin_size(in);
|
---|
| 3603 | if (sz > *outSz)
|
---|
| 3604 | ret = RSA_BUFFER_E;
|
---|
| 3605 |
|
---|
| 3606 | if (ret == 0)
|
---|
| 3607 | ret = mp_to_unsigned_bin(in, out);
|
---|
| 3608 |
|
---|
| 3609 | if (ret == MP_OKAY)
|
---|
| 3610 | *outSz = sz;
|
---|
| 3611 |
|
---|
| 3612 | return ret;
|
---|
| 3613 | }
|
---|
| 3614 |
|
---|
| 3615 |
|
---|
| 3616 | int wc_RsaExportKey(RsaKey* key,
|
---|
| 3617 | byte* e, word32* eSz, byte* n, word32* nSz,
|
---|
| 3618 | byte* d, word32* dSz, byte* p, word32* pSz,
|
---|
| 3619 | byte* q, word32* qSz)
|
---|
| 3620 | {
|
---|
| 3621 | int ret = BAD_FUNC_ARG;
|
---|
| 3622 |
|
---|
| 3623 | if (key && e && eSz && n && nSz && d && dSz && p && pSz && q && qSz)
|
---|
| 3624 | ret = 0;
|
---|
| 3625 |
|
---|
| 3626 | if (ret == 0)
|
---|
| 3627 | ret = RsaGetValue(&key->e, e, eSz);
|
---|
| 3628 | if (ret == 0)
|
---|
| 3629 | ret = RsaGetValue(&key->n, n, nSz);
|
---|
| 3630 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
| 3631 | if (ret == 0)
|
---|
| 3632 | ret = RsaGetValue(&key->d, d, dSz);
|
---|
| 3633 | if (ret == 0)
|
---|
| 3634 | ret = RsaGetValue(&key->p, p, pSz);
|
---|
| 3635 | if (ret == 0)
|
---|
| 3636 | ret = RsaGetValue(&key->q, q, qSz);
|
---|
| 3637 | #else
|
---|
| 3638 | /* no private parts to key */
|
---|
| 3639 | if (d == NULL || p == NULL || q == NULL || dSz == NULL || pSz == NULL
|
---|
| 3640 | || qSz == NULL) {
|
---|
| 3641 | ret = BAD_FUNC_ARG;
|
---|
| 3642 | }
|
---|
| 3643 | else {
|
---|
| 3644 | *dSz = 0;
|
---|
| 3645 | *pSz = 0;
|
---|
| 3646 | *qSz = 0;
|
---|
| 3647 | }
|
---|
| 3648 | #endif /* WOLFSSL_RSA_PUBLIC_ONLY */
|
---|
| 3649 |
|
---|
| 3650 | return ret;
|
---|
| 3651 | }
|
---|
| 3652 | #endif
|
---|
| 3653 |
|
---|
| 3654 |
|
---|
| 3655 | #ifdef WOLFSSL_KEY_GEN
|
---|
| 3656 |
|
---|
| 3657 | /* Check that |p-q| > 2^((size/2)-100) */
|
---|
| 3658 | static int wc_CompareDiffPQ(mp_int* p, mp_int* q, int size)
|
---|
| 3659 | {
|
---|
| 3660 | mp_int c, d;
|
---|
| 3661 | int ret;
|
---|
| 3662 |
|
---|
| 3663 | if (p == NULL || q == NULL)
|
---|
| 3664 | return BAD_FUNC_ARG;
|
---|
| 3665 |
|
---|
| 3666 | ret = mp_init_multi(&c, &d, NULL, NULL, NULL, NULL);
|
---|
| 3667 |
|
---|
| 3668 | /* c = 2^((size/2)-100) */
|
---|
| 3669 | if (ret == 0)
|
---|
| 3670 | ret = mp_2expt(&c, (size/2)-100);
|
---|
| 3671 |
|
---|
| 3672 | /* d = |p-q| */
|
---|
| 3673 | if (ret == 0)
|
---|
| 3674 | ret = mp_sub(p, q, &d);
|
---|
| 3675 |
|
---|
| 3676 | if (ret == 0)
|
---|
| 3677 | ret = mp_abs(&d, &d);
|
---|
| 3678 |
|
---|
| 3679 | /* compare */
|
---|
| 3680 | if (ret == 0)
|
---|
| 3681 | ret = mp_cmp(&d, &c);
|
---|
| 3682 |
|
---|
| 3683 | if (ret == MP_GT)
|
---|
| 3684 | ret = MP_OKAY;
|
---|
| 3685 |
|
---|
| 3686 | mp_clear(&d);
|
---|
| 3687 | mp_clear(&c);
|
---|
| 3688 |
|
---|
| 3689 | return ret;
|
---|
| 3690 | }
|
---|
| 3691 |
|
---|
| 3692 |
|
---|
| 3693 | /* The lower_bound value is floor(2^(0.5) * 2^((nlen/2)-1)) where nlen is 4096.
|
---|
| 3694 | * This number was calculated using a small test tool written with a common
|
---|
| 3695 | * large number math library. Other values of nlen may be checked with a subset
|
---|
| 3696 | * of lower_bound. */
|
---|
| 3697 | static const byte lower_bound[] = {
|
---|
| 3698 | 0xB5, 0x04, 0xF3, 0x33, 0xF9, 0xDE, 0x64, 0x84,
|
---|
| 3699 | 0x59, 0x7D, 0x89, 0xB3, 0x75, 0x4A, 0xBE, 0x9F,
|
---|
| 3700 | 0x1D, 0x6F, 0x60, 0xBA, 0x89, 0x3B, 0xA8, 0x4C,
|
---|
| 3701 | 0xED, 0x17, 0xAC, 0x85, 0x83, 0x33, 0x99, 0x15,
|
---|
| 3702 | /* 512 */
|
---|
| 3703 | 0x4A, 0xFC, 0x83, 0x04, 0x3A, 0xB8, 0xA2, 0xC3,
|
---|
| 3704 | 0xA8, 0xB1, 0xFE, 0x6F, 0xDC, 0x83, 0xDB, 0x39,
|
---|
| 3705 | 0x0F, 0x74, 0xA8, 0x5E, 0x43, 0x9C, 0x7B, 0x4A,
|
---|
| 3706 | 0x78, 0x04, 0x87, 0x36, 0x3D, 0xFA, 0x27, 0x68,
|
---|
| 3707 | /* 1024 */
|
---|
| 3708 | 0xD2, 0x20, 0x2E, 0x87, 0x42, 0xAF, 0x1F, 0x4E,
|
---|
| 3709 | 0x53, 0x05, 0x9C, 0x60, 0x11, 0xBC, 0x33, 0x7B,
|
---|
| 3710 | 0xCA, 0xB1, 0xBC, 0x91, 0x16, 0x88, 0x45, 0x8A,
|
---|
| 3711 | 0x46, 0x0A, 0xBC, 0x72, 0x2F, 0x7C, 0x4E, 0x33,
|
---|
| 3712 | 0xC6, 0xD5, 0xA8, 0xA3, 0x8B, 0xB7, 0xE9, 0xDC,
|
---|
| 3713 | 0xCB, 0x2A, 0x63, 0x43, 0x31, 0xF3, 0xC8, 0x4D,
|
---|
| 3714 | 0xF5, 0x2F, 0x12, 0x0F, 0x83, 0x6E, 0x58, 0x2E,
|
---|
| 3715 | 0xEA, 0xA4, 0xA0, 0x89, 0x90, 0x40, 0xCA, 0x4A,
|
---|
| 3716 | /* 2048 */
|
---|
| 3717 | 0x81, 0x39, 0x4A, 0xB6, 0xD8, 0xFD, 0x0E, 0xFD,
|
---|
| 3718 | 0xF4, 0xD3, 0xA0, 0x2C, 0xEB, 0xC9, 0x3E, 0x0C,
|
---|
| 3719 | 0x42, 0x64, 0xDA, 0xBC, 0xD5, 0x28, 0xB6, 0x51,
|
---|
| 3720 | 0xB8, 0xCF, 0x34, 0x1B, 0x6F, 0x82, 0x36, 0xC7,
|
---|
| 3721 | 0x01, 0x04, 0xDC, 0x01, 0xFE, 0x32, 0x35, 0x2F,
|
---|
| 3722 | 0x33, 0x2A, 0x5E, 0x9F, 0x7B, 0xDA, 0x1E, 0xBF,
|
---|
| 3723 | 0xF6, 0xA1, 0xBE, 0x3F, 0xCA, 0x22, 0x13, 0x07,
|
---|
| 3724 | 0xDE, 0xA0, 0x62, 0x41, 0xF7, 0xAA, 0x81, 0xC2,
|
---|
| 3725 | /* 3072 */
|
---|
| 3726 | 0xC1, 0xFC, 0xBD, 0xDE, 0xA2, 0xF7, 0xDC, 0x33,
|
---|
| 3727 | 0x18, 0x83, 0x8A, 0x2E, 0xAF, 0xF5, 0xF3, 0xB2,
|
---|
| 3728 | 0xD2, 0x4F, 0x4A, 0x76, 0x3F, 0xAC, 0xB8, 0x82,
|
---|
| 3729 | 0xFD, 0xFE, 0x17, 0x0F, 0xD3, 0xB1, 0xF7, 0x80,
|
---|
| 3730 | 0xF9, 0xAC, 0xCE, 0x41, 0x79, 0x7F, 0x28, 0x05,
|
---|
| 3731 | 0xC2, 0x46, 0x78, 0x5E, 0x92, 0x95, 0x70, 0x23,
|
---|
| 3732 | 0x5F, 0xCF, 0x8F, 0x7B, 0xCA, 0x3E, 0xA3, 0x3B,
|
---|
| 3733 | 0x4D, 0x7C, 0x60, 0xA5, 0xE6, 0x33, 0xE3, 0xE1
|
---|
| 3734 | /* 4096 */
|
---|
| 3735 | };
|
---|
| 3736 |
|
---|
| 3737 |
|
---|
| 3738 | /* returns 1 on key size ok and 0 if not ok */
|
---|
| 3739 | static WC_INLINE int RsaSizeCheck(int size)
|
---|
| 3740 | {
|
---|
| 3741 | if (size < RSA_MIN_SIZE || size > RSA_MAX_SIZE) {
|
---|
| 3742 | return 0;
|
---|
| 3743 | }
|
---|
| 3744 |
|
---|
| 3745 | #ifdef HAVE_FIPS
|
---|
| 3746 | /* Key size requirements for CAVP */
|
---|
| 3747 | switch (size) {
|
---|
| 3748 | case 1024:
|
---|
| 3749 | case 2048:
|
---|
| 3750 | case 3072:
|
---|
| 3751 | case 4096:
|
---|
| 3752 | return 1;
|
---|
| 3753 | }
|
---|
| 3754 |
|
---|
| 3755 | return 0;
|
---|
| 3756 | #else
|
---|
| 3757 | return 1; /* allow unusual key sizes in non FIPS mode */
|
---|
| 3758 | #endif /* HAVE_FIPS */
|
---|
| 3759 | }
|
---|
| 3760 |
|
---|
| 3761 |
|
---|
| 3762 | static int _CheckProbablePrime(mp_int* p, mp_int* q, mp_int* e, int nlen,
|
---|
| 3763 | int* isPrime, WC_RNG* rng)
|
---|
| 3764 | {
|
---|
| 3765 | int ret;
|
---|
| 3766 | mp_int tmp1, tmp2;
|
---|
| 3767 | mp_int* prime;
|
---|
| 3768 |
|
---|
| 3769 | if (p == NULL || e == NULL || isPrime == NULL)
|
---|
| 3770 | return BAD_FUNC_ARG;
|
---|
| 3771 |
|
---|
| 3772 | if (!RsaSizeCheck(nlen))
|
---|
| 3773 | return BAD_FUNC_ARG;
|
---|
| 3774 |
|
---|
| 3775 | *isPrime = MP_NO;
|
---|
| 3776 |
|
---|
| 3777 | if (q != NULL) {
|
---|
| 3778 | /* 5.4 - check that |p-q| <= (2^(1/2))(2^((nlen/2)-1)) */
|
---|
| 3779 | ret = wc_CompareDiffPQ(p, q, nlen);
|
---|
| 3780 | if (ret != MP_OKAY) goto notOkay;
|
---|
| 3781 | prime = q;
|
---|
| 3782 | }
|
---|
| 3783 | else
|
---|
| 3784 | prime = p;
|
---|
| 3785 |
|
---|
| 3786 | ret = mp_init_multi(&tmp1, &tmp2, NULL, NULL, NULL, NULL);
|
---|
| 3787 | if (ret != MP_OKAY) goto notOkay;
|
---|
| 3788 |
|
---|
| 3789 | /* 4.4,5.5 - Check that prime >= (2^(1/2))(2^((nlen/2)-1))
|
---|
| 3790 | * This is a comparison against lowerBound */
|
---|
| 3791 | ret = mp_read_unsigned_bin(&tmp1, lower_bound, nlen/16);
|
---|
| 3792 | if (ret != MP_OKAY) goto notOkay;
|
---|
| 3793 | ret = mp_cmp(prime, &tmp1);
|
---|
| 3794 | if (ret == MP_LT) goto exit;
|
---|
| 3795 |
|
---|
| 3796 | /* 4.5,5.6 - Check that GCD(p-1, e) == 1 */
|
---|
| 3797 | ret = mp_sub_d(prime, 1, &tmp1); /* tmp1 = prime-1 */
|
---|
| 3798 | if (ret != MP_OKAY) goto notOkay;
|
---|
| 3799 | ret = mp_gcd(&tmp1, e, &tmp2); /* tmp2 = gcd(prime-1, e) */
|
---|
| 3800 | if (ret != MP_OKAY) goto notOkay;
|
---|
| 3801 | ret = mp_cmp_d(&tmp2, 1);
|
---|
| 3802 | if (ret != MP_EQ) goto exit; /* e divides p-1 */
|
---|
| 3803 |
|
---|
| 3804 | /* 4.5.1,5.6.1 - Check primality of p with 8 rounds of M-R.
|
---|
| 3805 | * mp_prime_is_prime_ex() performs test divisions against the first 256
|
---|
| 3806 | * prime numbers. After that it performs 8 rounds of M-R using random
|
---|
| 3807 | * bases between 2 and n-2.
|
---|
| 3808 | * mp_prime_is_prime() performs the same test divisions and then does
|
---|
| 3809 | * M-R with the first 8 primes. Both functions set isPrime as a
|
---|
| 3810 | * side-effect. */
|
---|
| 3811 | if (rng != NULL)
|
---|
| 3812 | ret = mp_prime_is_prime_ex(prime, 8, isPrime, rng);
|
---|
| 3813 | else
|
---|
| 3814 | ret = mp_prime_is_prime(prime, 8, isPrime);
|
---|
| 3815 | if (ret != MP_OKAY) goto notOkay;
|
---|
| 3816 |
|
---|
| 3817 | exit:
|
---|
| 3818 | ret = MP_OKAY;
|
---|
| 3819 | notOkay:
|
---|
| 3820 | mp_clear(&tmp1);
|
---|
| 3821 | mp_clear(&tmp2);
|
---|
| 3822 | return ret;
|
---|
| 3823 | }
|
---|
| 3824 |
|
---|
| 3825 |
|
---|
| 3826 | int wc_CheckProbablePrime_ex(const byte* pRaw, word32 pRawSz,
|
---|
| 3827 | const byte* qRaw, word32 qRawSz,
|
---|
| 3828 | const byte* eRaw, word32 eRawSz,
|
---|
| 3829 | int nlen, int* isPrime, WC_RNG* rng)
|
---|
| 3830 | {
|
---|
| 3831 | mp_int p, q, e;
|
---|
| 3832 | mp_int* Q = NULL;
|
---|
| 3833 | int ret;
|
---|
| 3834 |
|
---|
| 3835 | if (pRaw == NULL || pRawSz == 0 ||
|
---|
| 3836 | eRaw == NULL || eRawSz == 0 ||
|
---|
| 3837 | isPrime == NULL) {
|
---|
| 3838 |
|
---|
| 3839 | return BAD_FUNC_ARG;
|
---|
| 3840 | }
|
---|
| 3841 |
|
---|
| 3842 | if ((qRaw != NULL && qRawSz == 0) || (qRaw == NULL && qRawSz != 0))
|
---|
| 3843 | return BAD_FUNC_ARG;
|
---|
| 3844 |
|
---|
| 3845 | ret = mp_init_multi(&p, &q, &e, NULL, NULL, NULL);
|
---|
| 3846 |
|
---|
| 3847 | if (ret == MP_OKAY)
|
---|
| 3848 | ret = mp_read_unsigned_bin(&p, pRaw, pRawSz);
|
---|
| 3849 |
|
---|
| 3850 | if (ret == MP_OKAY) {
|
---|
| 3851 | if (qRaw != NULL) {
|
---|
| 3852 | ret = mp_read_unsigned_bin(&q, qRaw, qRawSz);
|
---|
| 3853 | if (ret == MP_OKAY)
|
---|
| 3854 | Q = &q;
|
---|
| 3855 | }
|
---|
| 3856 | }
|
---|
| 3857 |
|
---|
| 3858 | if (ret == MP_OKAY)
|
---|
| 3859 | ret = mp_read_unsigned_bin(&e, eRaw, eRawSz);
|
---|
| 3860 |
|
---|
| 3861 | if (ret == MP_OKAY)
|
---|
| 3862 | ret = _CheckProbablePrime(&p, Q, &e, nlen, isPrime, rng);
|
---|
| 3863 |
|
---|
| 3864 | ret = (ret == MP_OKAY) ? 0 : PRIME_GEN_E;
|
---|
| 3865 |
|
---|
| 3866 | mp_clear(&p);
|
---|
| 3867 | mp_clear(&q);
|
---|
| 3868 | mp_clear(&e);
|
---|
| 3869 |
|
---|
| 3870 | return ret;
|
---|
| 3871 | }
|
---|
| 3872 |
|
---|
| 3873 |
|
---|
| 3874 | int wc_CheckProbablePrime(const byte* pRaw, word32 pRawSz,
|
---|
| 3875 | const byte* qRaw, word32 qRawSz,
|
---|
| 3876 | const byte* eRaw, word32 eRawSz,
|
---|
| 3877 | int nlen, int* isPrime)
|
---|
| 3878 | {
|
---|
| 3879 | return wc_CheckProbablePrime_ex(pRaw, pRawSz, qRaw, qRawSz,
|
---|
| 3880 | eRaw, eRawSz, nlen, isPrime, NULL);
|
---|
| 3881 | }
|
---|
| 3882 |
|
---|
| 3883 | #if !defined(HAVE_FIPS) || (defined(HAVE_FIPS) && \
|
---|
| 3884 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))
|
---|
| 3885 | /* Make an RSA key for size bits, with e specified, 65537 is a good e */
|
---|
| 3886 | int wc_MakeRsaKey(RsaKey* key, int size, long e, WC_RNG* rng)
|
---|
| 3887 | {
|
---|
| 3888 | #ifndef WC_NO_RNG
|
---|
| 3889 | mp_int p, q, tmp1, tmp2, tmp3;
|
---|
| 3890 | int err, i, failCount, primeSz, isPrime = 0;
|
---|
| 3891 | byte* buf = NULL;
|
---|
| 3892 |
|
---|
| 3893 | if (key == NULL || rng == NULL)
|
---|
| 3894 | return BAD_FUNC_ARG;
|
---|
| 3895 |
|
---|
| 3896 | if (!RsaSizeCheck(size))
|
---|
| 3897 | return BAD_FUNC_ARG;
|
---|
| 3898 |
|
---|
| 3899 | if (e < 3 || (e & 1) == 0)
|
---|
| 3900 | return BAD_FUNC_ARG;
|
---|
| 3901 |
|
---|
| 3902 | #if defined(WOLFSSL_CRYPTOCELL)
|
---|
| 3903 |
|
---|
| 3904 | return cc310_RSA_GenerateKeyPair(key, size, e);
|
---|
| 3905 |
|
---|
| 3906 | #endif /*WOLFSSL_CRYPTOCELL*/
|
---|
| 3907 |
|
---|
| 3908 | #ifdef WOLF_CRYPTO_CB
|
---|
| 3909 | if (key->devId != INVALID_DEVID) {
|
---|
| 3910 | int ret = wc_CryptoCb_MakeRsaKey(key, size, e, rng);
|
---|
| 3911 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
| 3912 | return ret;
|
---|
| 3913 | /* fall-through when unavailable */
|
---|
| 3914 | }
|
---|
| 3915 | #endif
|
---|
| 3916 |
|
---|
| 3917 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 3918 | defined(WC_ASYNC_ENABLE_RSA_KEYGEN)
|
---|
| 3919 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA) {
|
---|
| 3920 | #ifdef HAVE_CAVIUM
|
---|
| 3921 | /* TODO: Not implemented */
|
---|
| 3922 | #elif defined(HAVE_INTEL_QA)
|
---|
| 3923 | return IntelQaRsaKeyGen(&key->asyncDev, key, size, e, rng);
|
---|
| 3924 | #else
|
---|
| 3925 | if (wc_AsyncTestInit(&key->asyncDev, ASYNC_TEST_RSA_MAKE)) {
|
---|
| 3926 | WC_ASYNC_TEST* testDev = &key->asyncDev.test;
|
---|
| 3927 | testDev->rsaMake.rng = rng;
|
---|
| 3928 | testDev->rsaMake.key = key;
|
---|
| 3929 | testDev->rsaMake.size = size;
|
---|
| 3930 | testDev->rsaMake.e = e;
|
---|
| 3931 | return WC_PENDING_E;
|
---|
| 3932 | }
|
---|
| 3933 | #endif
|
---|
| 3934 | }
|
---|
| 3935 | #endif
|
---|
| 3936 |
|
---|
| 3937 | err = mp_init_multi(&p, &q, &tmp1, &tmp2, &tmp3, NULL);
|
---|
| 3938 |
|
---|
| 3939 | if (err == MP_OKAY)
|
---|
| 3940 | err = mp_set_int(&tmp3, e);
|
---|
| 3941 |
|
---|
| 3942 | /* The failCount value comes from NIST FIPS 186-4, section B.3.3,
|
---|
| 3943 | * process steps 4.7 and 5.8. */
|
---|
| 3944 | failCount = 5 * (size / 2);
|
---|
| 3945 | primeSz = size / 16; /* size is the size of n in bits.
|
---|
| 3946 | primeSz is in bytes. */
|
---|
| 3947 |
|
---|
| 3948 | /* allocate buffer to work with */
|
---|
| 3949 | if (err == MP_OKAY) {
|
---|
| 3950 | buf = (byte*)XMALLOC(primeSz, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 3951 | if (buf == NULL)
|
---|
| 3952 | err = MEMORY_E;
|
---|
| 3953 | }
|
---|
| 3954 |
|
---|
| 3955 | /* make p */
|
---|
| 3956 | if (err == MP_OKAY) {
|
---|
| 3957 | isPrime = 0;
|
---|
| 3958 | i = 0;
|
---|
| 3959 | do {
|
---|
| 3960 | #ifdef SHOW_GEN
|
---|
| 3961 | printf(".");
|
---|
| 3962 | fflush(stdout);
|
---|
| 3963 | #endif
|
---|
| 3964 | /* generate value */
|
---|
| 3965 | err = wc_RNG_GenerateBlock(rng, buf, primeSz);
|
---|
| 3966 | if (err == 0) {
|
---|
| 3967 | /* prime lower bound has the MSB set, set it in candidate */
|
---|
| 3968 | buf[0] |= 0x80;
|
---|
| 3969 | /* make candidate odd */
|
---|
| 3970 | buf[primeSz-1] |= 0x01;
|
---|
| 3971 | /* load value */
|
---|
| 3972 | err = mp_read_unsigned_bin(&p, buf, primeSz);
|
---|
| 3973 | }
|
---|
| 3974 |
|
---|
| 3975 | if (err == MP_OKAY)
|
---|
| 3976 | err = _CheckProbablePrime(&p, NULL, &tmp3, size, &isPrime, rng);
|
---|
| 3977 |
|
---|
| 3978 | #ifdef HAVE_FIPS
|
---|
| 3979 | i++;
|
---|
| 3980 | #else
|
---|
| 3981 | /* Keep the old retry behavior in non-FIPS build. */
|
---|
| 3982 | (void)i;
|
---|
| 3983 | #endif
|
---|
| 3984 | } while (err == MP_OKAY && !isPrime && i < failCount);
|
---|
| 3985 | }
|
---|
| 3986 |
|
---|
| 3987 | if (err == MP_OKAY && !isPrime)
|
---|
| 3988 | err = PRIME_GEN_E;
|
---|
| 3989 |
|
---|
| 3990 | /* make q */
|
---|
| 3991 | if (err == MP_OKAY) {
|
---|
| 3992 | isPrime = 0;
|
---|
| 3993 | i = 0;
|
---|
| 3994 | do {
|
---|
| 3995 | #ifdef SHOW_GEN
|
---|
| 3996 | printf(".");
|
---|
| 3997 | fflush(stdout);
|
---|
| 3998 | #endif
|
---|
| 3999 | /* generate value */
|
---|
| 4000 | err = wc_RNG_GenerateBlock(rng, buf, primeSz);
|
---|
| 4001 | if (err == 0) {
|
---|
| 4002 | /* prime lower bound has the MSB set, set it in candidate */
|
---|
| 4003 | buf[0] |= 0x80;
|
---|
| 4004 | /* make candidate odd */
|
---|
| 4005 | buf[primeSz-1] |= 0x01;
|
---|
| 4006 | /* load value */
|
---|
| 4007 | err = mp_read_unsigned_bin(&q, buf, primeSz);
|
---|
| 4008 | }
|
---|
| 4009 |
|
---|
| 4010 | if (err == MP_OKAY)
|
---|
| 4011 | err = _CheckProbablePrime(&p, &q, &tmp3, size, &isPrime, rng);
|
---|
| 4012 |
|
---|
| 4013 | #ifdef HAVE_FIPS
|
---|
| 4014 | i++;
|
---|
| 4015 | #else
|
---|
| 4016 | /* Keep the old retry behavior in non-FIPS build. */
|
---|
| 4017 | (void)i;
|
---|
| 4018 | #endif
|
---|
| 4019 | } while (err == MP_OKAY && !isPrime && i < failCount);
|
---|
| 4020 | }
|
---|
| 4021 |
|
---|
| 4022 | if (err == MP_OKAY && !isPrime)
|
---|
| 4023 | err = PRIME_GEN_E;
|
---|
| 4024 |
|
---|
| 4025 | if (buf) {
|
---|
| 4026 | ForceZero(buf, primeSz);
|
---|
| 4027 | XFREE(buf, key->heap, DYNAMIC_TYPE_RSA);
|
---|
| 4028 | }
|
---|
| 4029 |
|
---|
| 4030 | if (err == MP_OKAY && mp_cmp(&p, &q) < 0) {
|
---|
| 4031 | err = mp_copy(&p, &tmp1);
|
---|
| 4032 | if (err == MP_OKAY)
|
---|
| 4033 | err = mp_copy(&q, &p);
|
---|
| 4034 | if (err == MP_OKAY)
|
---|
| 4035 | mp_copy(&tmp1, &q);
|
---|
| 4036 | }
|
---|
| 4037 |
|
---|
| 4038 | /* Setup RsaKey buffers */
|
---|
| 4039 | if (err == MP_OKAY)
|
---|
| 4040 | err = mp_init_multi(&key->n, &key->e, &key->d, &key->p, &key->q, NULL);
|
---|
| 4041 | if (err == MP_OKAY)
|
---|
| 4042 | err = mp_init_multi(&key->dP, &key->dQ, &key->u, NULL, NULL, NULL);
|
---|
| 4043 |
|
---|
| 4044 | /* Software Key Calculation */
|
---|
| 4045 | if (err == MP_OKAY) /* tmp1 = p-1 */
|
---|
| 4046 | err = mp_sub_d(&p, 1, &tmp1);
|
---|
| 4047 | if (err == MP_OKAY) /* tmp2 = q-1 */
|
---|
| 4048 | err = mp_sub_d(&q, 1, &tmp2);
|
---|
| 4049 | #ifdef WC_RSA_BLINDING
|
---|
| 4050 | if (err == MP_OKAY) /* tmp3 = order of n */
|
---|
| 4051 | err = mp_mul(&tmp1, &tmp2, &tmp3);
|
---|
| 4052 | #else
|
---|
| 4053 | if (err == MP_OKAY) /* tmp3 = lcm(p-1, q-1), last loop */
|
---|
| 4054 | err = mp_lcm(&tmp1, &tmp2, &tmp3);
|
---|
| 4055 | #endif
|
---|
| 4056 | /* make key */
|
---|
| 4057 | if (err == MP_OKAY) /* key->e = e */
|
---|
| 4058 | err = mp_set_int(&key->e, (mp_digit)e);
|
---|
| 4059 | #ifdef WC_RSA_BLINDING
|
---|
| 4060 | /* Blind the inverse operation with a value that is invertable */
|
---|
| 4061 | if (err == MP_OKAY) {
|
---|
| 4062 | do {
|
---|
| 4063 | err = mp_rand(&key->p, get_digit_count(&tmp3), rng);
|
---|
| 4064 | if (err == MP_OKAY)
|
---|
| 4065 | err = mp_set_bit(&key->p, 0);
|
---|
| 4066 | if (err == MP_OKAY)
|
---|
| 4067 | err = mp_set_bit(&key->p, size - 1);
|
---|
| 4068 | if (err == MP_OKAY)
|
---|
| 4069 | err = mp_gcd(&key->p, &tmp3, &key->q);
|
---|
| 4070 | }
|
---|
| 4071 | while ((err == MP_OKAY) && !mp_isone(&key->q));
|
---|
| 4072 | }
|
---|
| 4073 | if (err == MP_OKAY)
|
---|
| 4074 | err = mp_mul_d(&key->p, (mp_digit)e, &key->e);
|
---|
| 4075 | #endif
|
---|
| 4076 | if (err == MP_OKAY) /* key->d = 1/e mod lcm(p-1, q-1) */
|
---|
| 4077 | err = mp_invmod(&key->e, &tmp3, &key->d);
|
---|
| 4078 | #ifdef WC_RSA_BLINDING
|
---|
| 4079 | /* Take off blinding from d and reset e */
|
---|
| 4080 | if (err == MP_OKAY)
|
---|
| 4081 | err = mp_mulmod(&key->d, &key->p, &tmp3, &key->d);
|
---|
| 4082 | if (err == MP_OKAY)
|
---|
| 4083 | err = mp_set_int(&key->e, (mp_digit)e);
|
---|
| 4084 | #endif
|
---|
| 4085 | if (err == MP_OKAY) /* key->n = pq */
|
---|
| 4086 | err = mp_mul(&p, &q, &key->n);
|
---|
| 4087 | if (err == MP_OKAY) /* key->dP = d mod(p-1) */
|
---|
| 4088 | err = mp_mod(&key->d, &tmp1, &key->dP);
|
---|
| 4089 | if (err == MP_OKAY) /* key->dQ = d mod(q-1) */
|
---|
| 4090 | err = mp_mod(&key->d, &tmp2, &key->dQ);
|
---|
| 4091 | #ifdef WOLFSSL_MP_INVMOD_CONSTANT_TIME
|
---|
| 4092 | if (err == MP_OKAY) /* key->u = 1/q mod p */
|
---|
| 4093 | err = mp_invmod(&q, &p, &key->u);
|
---|
| 4094 | #else
|
---|
| 4095 | if (err == MP_OKAY)
|
---|
| 4096 | err = mp_sub_d(&p, 2, &tmp3);
|
---|
| 4097 | if (err == MP_OKAY) /* key->u = 1/q mod p = q^p-2 mod p */
|
---|
| 4098 | err = mp_exptmod(&q, &tmp3 , &p, &key->u);
|
---|
| 4099 | #endif
|
---|
| 4100 | if (err == MP_OKAY)
|
---|
| 4101 | err = mp_copy(&p, &key->p);
|
---|
| 4102 | if (err == MP_OKAY)
|
---|
| 4103 | err = mp_copy(&q, &key->q);
|
---|
| 4104 |
|
---|
| 4105 | #ifdef HAVE_WOLF_BIGINT
|
---|
| 4106 | /* make sure raw unsigned bin version is available */
|
---|
| 4107 | if (err == MP_OKAY)
|
---|
| 4108 | err = wc_mp_to_bigint(&key->n, &key->n.raw);
|
---|
| 4109 | if (err == MP_OKAY)
|
---|
| 4110 | err = wc_mp_to_bigint(&key->e, &key->e.raw);
|
---|
| 4111 | if (err == MP_OKAY)
|
---|
| 4112 | err = wc_mp_to_bigint(&key->d, &key->d.raw);
|
---|
| 4113 | if (err == MP_OKAY)
|
---|
| 4114 | err = wc_mp_to_bigint(&key->p, &key->p.raw);
|
---|
| 4115 | if (err == MP_OKAY)
|
---|
| 4116 | err = wc_mp_to_bigint(&key->q, &key->q.raw);
|
---|
| 4117 | if (err == MP_OKAY)
|
---|
| 4118 | err = wc_mp_to_bigint(&key->dP, &key->dP.raw);
|
---|
| 4119 | if (err == MP_OKAY)
|
---|
| 4120 | err = wc_mp_to_bigint(&key->dQ, &key->dQ.raw);
|
---|
| 4121 | if (err == MP_OKAY)
|
---|
| 4122 | err = wc_mp_to_bigint(&key->u, &key->u.raw);
|
---|
| 4123 | #endif
|
---|
| 4124 |
|
---|
| 4125 | if (err == MP_OKAY)
|
---|
| 4126 | key->type = RSA_PRIVATE;
|
---|
| 4127 |
|
---|
| 4128 | mp_clear(&tmp1);
|
---|
| 4129 | mp_clear(&tmp2);
|
---|
| 4130 | mp_clear(&tmp3);
|
---|
| 4131 | mp_clear(&p);
|
---|
| 4132 | mp_clear(&q);
|
---|
| 4133 |
|
---|
| 4134 | #if defined(WOLFSSL_KEY_GEN) && !defined(WOLFSSL_NO_RSA_KEY_CHECK)
|
---|
| 4135 | /* Perform the pair-wise consistency test on the new key. */
|
---|
| 4136 | if (err == 0)
|
---|
| 4137 | err = wc_CheckRsaKey(key);
|
---|
| 4138 | #endif
|
---|
| 4139 |
|
---|
| 4140 | if (err != 0) {
|
---|
| 4141 | wc_FreeRsaKey(key);
|
---|
| 4142 | return err;
|
---|
| 4143 | }
|
---|
| 4144 |
|
---|
| 4145 | #if defined(WOLFSSL_XILINX_CRYPT) || defined(WOLFSSL_CRYPTOCELL)
|
---|
| 4146 | if (wc_InitRsaHw(key) != 0) {
|
---|
| 4147 | return BAD_STATE_E;
|
---|
| 4148 | }
|
---|
| 4149 | #endif
|
---|
| 4150 | return 0;
|
---|
| 4151 | #else
|
---|
| 4152 | return NOT_COMPILED_IN;
|
---|
| 4153 | #endif
|
---|
| 4154 | }
|
---|
| 4155 | #endif /* !FIPS || FIPS_VER >= 2 */
|
---|
| 4156 | #endif /* WOLFSSL_KEY_GEN */
|
---|
| 4157 |
|
---|
| 4158 |
|
---|
| 4159 | #ifdef WC_RSA_BLINDING
|
---|
| 4160 | int wc_RsaSetRNG(RsaKey* key, WC_RNG* rng)
|
---|
| 4161 | {
|
---|
| 4162 | if (key == NULL)
|
---|
| 4163 | return BAD_FUNC_ARG;
|
---|
| 4164 |
|
---|
| 4165 | key->rng = rng;
|
---|
| 4166 |
|
---|
| 4167 | return 0;
|
---|
| 4168 | }
|
---|
| 4169 | #endif /* WC_RSA_BLINDING */
|
---|
| 4170 |
|
---|
| 4171 | #ifdef WC_RSA_NONBLOCK
|
---|
| 4172 | int wc_RsaSetNonBlock(RsaKey* key, RsaNb* nb)
|
---|
| 4173 | {
|
---|
| 4174 | if (key == NULL)
|
---|
| 4175 | return BAD_FUNC_ARG;
|
---|
| 4176 |
|
---|
| 4177 | if (nb) {
|
---|
| 4178 | XMEMSET(nb, 0, sizeof(RsaNb));
|
---|
| 4179 | }
|
---|
| 4180 |
|
---|
| 4181 | /* Allow nb == NULL to clear non-block mode */
|
---|
| 4182 | key->nb = nb;
|
---|
| 4183 |
|
---|
| 4184 | return 0;
|
---|
| 4185 | }
|
---|
| 4186 | #ifdef WC_RSA_NONBLOCK_TIME
|
---|
| 4187 | int wc_RsaSetNonBlockTime(RsaKey* key, word32 maxBlockUs, word32 cpuMHz)
|
---|
| 4188 | {
|
---|
| 4189 | if (key == NULL || key->nb == NULL) {
|
---|
| 4190 | return BAD_FUNC_ARG;
|
---|
| 4191 | }
|
---|
| 4192 |
|
---|
| 4193 | /* calculate maximum number of instructions to block */
|
---|
| 4194 | key->nb->exptmod.maxBlockInst = cpuMHz * maxBlockUs;
|
---|
| 4195 |
|
---|
| 4196 | return 0;
|
---|
| 4197 | }
|
---|
| 4198 | #endif /* WC_RSA_NONBLOCK_TIME */
|
---|
| 4199 | #endif /* WC_RSA_NONBLOCK */
|
---|
| 4200 |
|
---|
| 4201 | #endif /* NO_RSA */
|
---|