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