[337] | 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 | #include <wolfssl/wolfcrypt/rsa.h>
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| 33 |
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| 34 | #ifdef WOLFSSL_HAVE_SP_RSA
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| 35 | #include <wolfssl/wolfcrypt/sp.h>
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| 36 | #endif
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| 37 |
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| 38 | /*
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| 39 | Possible RSA enable options:
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| 40 | * NO_RSA: Overall control of RSA default: on (not defined)
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| 41 | * WC_RSA_BLINDING: Uses Blinding w/ Private Ops default: off
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| 42 | Note: slower by ~20%
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| 43 | * WOLFSSL_KEY_GEN: Allows Private Key Generation default: off
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| 44 | * RSA_LOW_MEM: NON CRT Private Operations, less memory default: off
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| 45 | * WC_NO_RSA_OAEP: Disables RSA OAEP padding default: on (not defined)
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| 46 |
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| 47 | */
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| 48 |
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| 49 | /*
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| 50 | RSA Key Size Configuration:
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| 51 | * FP_MAX_BITS: With USE_FAST_MATH only default: 4096
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| 52 | If USE_FAST_MATH then use this to override default.
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| 53 | Value is key size * 2. Example: RSA 3072 = 6144
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| 54 | */
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| 55 |
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| 56 |
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| 57 | #ifdef HAVE_FIPS
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| 58 | int wc_InitRsaKey(RsaKey* key, void* ptr)
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| 59 | {
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| 60 | if (key == NULL) {
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| 61 | return BAD_FUNC_ARG;
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| 62 | }
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| 63 |
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| 64 | return InitRsaKey_fips(key, ptr);
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| 65 | }
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| 66 |
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| 67 | int wc_InitRsaKey_ex(RsaKey* key, void* ptr, int devId)
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| 68 | {
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| 69 | (void)devId;
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| 70 | if (key == NULL) {
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| 71 | return BAD_FUNC_ARG;
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| 72 | }
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| 73 | return InitRsaKey_fips(key, ptr);
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| 74 | }
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| 75 |
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| 76 | int wc_FreeRsaKey(RsaKey* key)
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| 77 | {
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| 78 | return FreeRsaKey_fips(key);
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| 79 | }
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| 80 |
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| 81 |
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| 82 | int wc_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out,
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| 83 | word32 outLen, RsaKey* key, WC_RNG* rng)
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| 84 | {
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| 85 | if (in == NULL || out == NULL || key == NULL || rng == NULL) {
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| 86 | return BAD_FUNC_ARG;
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| 87 | }
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| 88 | return RsaPublicEncrypt_fips(in, inLen, out, outLen, key, rng);
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| 89 | }
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| 90 |
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| 91 |
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| 92 | int wc_RsaPrivateDecryptInline(byte* in, word32 inLen, byte** out,
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| 93 | RsaKey* key)
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| 94 | {
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| 95 | if (in == NULL || out == NULL || key == NULL) {
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| 96 | return BAD_FUNC_ARG;
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| 97 | }
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| 98 | return RsaPrivateDecryptInline_fips(in, inLen, out, key);
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| 99 | }
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| 100 |
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| 101 |
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| 102 | int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out,
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| 103 | word32 outLen, RsaKey* key)
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| 104 | {
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| 105 | if (in == NULL || out == NULL || key == NULL) {
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| 106 | return BAD_FUNC_ARG;
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| 107 | }
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| 108 | return RsaPrivateDecrypt_fips(in, inLen, out, outLen, key);
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| 109 | }
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| 110 |
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| 111 |
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| 112 | int wc_RsaSSL_Sign(const byte* in, word32 inLen, byte* out,
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| 113 | word32 outLen, RsaKey* key, WC_RNG* rng)
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| 114 | {
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| 115 | if (in == NULL || out == NULL || key == NULL || inLen == 0) {
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| 116 | return BAD_FUNC_ARG;
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| 117 | }
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| 118 | return RsaSSL_Sign_fips(in, inLen, out, outLen, key, rng);
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| 119 | }
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| 120 |
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| 121 |
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| 122 | int wc_RsaSSL_VerifyInline(byte* in, word32 inLen, byte** out, RsaKey* key)
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| 123 | {
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| 124 | if (in == NULL || out == NULL || key == NULL) {
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| 125 | return BAD_FUNC_ARG;
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| 126 | }
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| 127 | return RsaSSL_VerifyInline_fips(in, inLen, out, key);
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| 128 | }
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| 129 |
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| 130 |
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| 131 | int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out,
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| 132 | word32 outLen, RsaKey* key)
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| 133 | {
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| 134 | if (in == NULL || out == NULL || key == NULL || inLen == 0) {
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| 135 | return BAD_FUNC_ARG;
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| 136 | }
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| 137 | return RsaSSL_Verify_fips(in, inLen, out, outLen, key);
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| 138 | }
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| 139 |
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| 140 |
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| 141 | int wc_RsaEncryptSize(RsaKey* key)
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| 142 | {
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| 143 | if (key == NULL) {
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| 144 | return BAD_FUNC_ARG;
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| 145 | }
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| 146 | return RsaEncryptSize_fips(key);
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| 147 | }
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| 148 |
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| 149 |
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| 150 | int wc_RsaFlattenPublicKey(RsaKey* key, byte* a, word32* aSz, byte* b,
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| 151 | word32* bSz)
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| 152 | {
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| 153 |
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| 154 | /* not specified as fips so not needing _fips */
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| 155 | return RsaFlattenPublicKey(key, a, aSz, b, bSz);
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| 156 | }
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| 157 | #ifdef WOLFSSL_KEY_GEN
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| 158 | int wc_MakeRsaKey(RsaKey* key, int size, long e, WC_RNG* rng)
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| 159 | {
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| 160 | return MakeRsaKey(key, size, e, rng);
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| 161 | }
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| 162 | #endif
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| 163 |
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| 164 |
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| 165 | /* these are functions in asn and are routed to wolfssl/wolfcrypt/asn.c
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| 166 | * wc_RsaPrivateKeyDecode
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| 167 | * wc_RsaPublicKeyDecode
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| 168 | */
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| 169 |
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| 170 | #else /* else build without fips */
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| 171 |
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| 172 | #include <wolfssl/wolfcrypt/random.h>
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| 173 | #include <wolfssl/wolfcrypt/logging.h>
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| 174 | #ifdef NO_INLINE
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| 175 | #include <wolfssl/wolfcrypt/misc.h>
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| 176 | #else
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| 177 | #define WOLFSSL_MISC_INCLUDED
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| 178 | #include <wolfcrypt/src/misc.c>
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| 179 | #endif
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| 180 |
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| 181 | #define ERROR_OUT(x) { ret = (x); goto done;}
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| 182 |
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| 183 |
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| 184 | enum {
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| 185 | RSA_STATE_NONE = 0,
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| 186 |
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| 187 | RSA_STATE_ENCRYPT_PAD,
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| 188 | RSA_STATE_ENCRYPT_EXPTMOD,
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| 189 | RSA_STATE_ENCRYPT_RES,
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| 190 |
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| 191 | RSA_STATE_DECRYPT_EXPTMOD,
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| 192 | RSA_STATE_DECRYPT_UNPAD,
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| 193 | RSA_STATE_DECRYPT_RES,
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| 194 | };
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| 195 |
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| 196 | static void wc_RsaCleanup(RsaKey* key)
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| 197 | {
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| 198 | if (key && key->data) {
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| 199 | /* make sure any allocated memory is free'd */
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| 200 | if (key->dataIsAlloc) {
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| 201 | if (key->type == RSA_PRIVATE_DECRYPT ||
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| 202 | key->type == RSA_PRIVATE_ENCRYPT) {
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| 203 | ForceZero(key->data, key->dataLen);
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| 204 | }
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| 205 | XFREE(key->data, key->heap, DYNAMIC_TYPE_WOLF_BIGINT);
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| 206 | key->dataIsAlloc = 0;
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| 207 | }
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| 208 | key->data = NULL;
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| 209 | key->dataLen = 0;
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| 210 | }
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| 211 | }
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| 212 |
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| 213 | int wc_InitRsaKey_ex(RsaKey* key, void* heap, int devId)
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| 214 | {
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| 215 | int ret = 0;
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| 216 |
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| 217 | if (key == NULL) {
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| 218 | return BAD_FUNC_ARG;
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| 219 | }
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| 220 |
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| 221 | key->type = RSA_TYPE_UNKNOWN;
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| 222 | key->state = RSA_STATE_NONE;
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| 223 | key->heap = heap;
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| 224 | key->data = NULL;
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| 225 | key->dataLen = 0;
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| 226 | key->dataIsAlloc = 0;
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| 227 | #ifdef WC_RSA_BLINDING
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| 228 | key->rng = NULL;
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| 229 | #endif
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| 230 |
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| 231 | #ifdef WOLFSSL_ASYNC_CRYPT
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| 232 | #ifdef WOLFSSL_CERT_GEN
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| 233 | XMEMSET(&key->certSignCtx, 0, sizeof(CertSignCtx));
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| 234 | #endif
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| 235 |
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| 236 | #ifdef WC_ASYNC_ENABLE_RSA
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| 237 | /* handle as async */
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| 238 | ret = wolfAsync_DevCtxInit(&key->asyncDev, WOLFSSL_ASYNC_MARKER_RSA,
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| 239 | key->heap, devId);
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| 240 | if (ret != 0)
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| 241 | return ret;
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| 242 | #endif /* WC_ASYNC_ENABLE_RSA */
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| 243 | #else
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| 244 | (void)devId;
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| 245 | #endif /* WOLFSSL_ASYNC_CRYPT */
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| 246 |
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| 247 | ret = mp_init_multi(&key->n, &key->e, NULL, NULL, NULL, NULL);
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| 248 | if (ret != MP_OKAY)
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| 249 | return ret;
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| 250 |
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| 251 | ret = mp_init_multi(&key->d, &key->p, &key->q, &key->dP, &key->dQ, &key->u);
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| 252 | if (ret != MP_OKAY) {
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| 253 | mp_clear(&key->n);
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| 254 | mp_clear(&key->e);
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| 255 | return ret;
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| 256 | }
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| 257 |
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| 258 | #ifdef WOLFSSL_XILINX_CRYPT
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| 259 | key->pubExp = 0;
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| 260 | key->mod = NULL;
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| 261 | #endif
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| 262 |
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| 263 | return ret;
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| 264 | }
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| 265 |
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| 266 | int wc_InitRsaKey(RsaKey* key, void* heap)
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| 267 | {
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| 268 | return wc_InitRsaKey_ex(key, heap, INVALID_DEVID);
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| 269 | }
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| 270 |
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| 271 |
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| 272 | #ifdef WOLFSSL_XILINX_CRYPT
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| 273 | #define MAX_E_SIZE 4
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| 274 | /* Used to setup hardware state
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| 275 | *
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| 276 | * key the RSA key to setup
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| 277 | *
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| 278 | * returns 0 on success
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| 279 | */
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| 280 | int wc_InitRsaHw(RsaKey* key)
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| 281 | {
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| 282 | unsigned char* m; /* RSA modulous */
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| 283 | word32 e = 0; /* RSA public exponent */
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| 284 | int mSz;
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| 285 | int eSz;
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| 286 |
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| 287 | if (key == NULL) {
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| 288 | return BAD_FUNC_ARG;
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| 289 | }
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| 290 |
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| 291 | mSz = mp_unsigned_bin_size(&(key->n));
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| 292 | m = (unsigned char*)XMALLOC(mSz, key->heap, DYNAMIC_TYPE_KEY);
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| 293 | if (m == 0) {
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| 294 | return MEMORY_E;
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| 295 | }
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| 296 |
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| 297 | if (mp_to_unsigned_bin(&(key->n), m) != MP_OKAY) {
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| 298 | WOLFSSL_MSG("Unable to get RSA key modulus");
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| 299 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 300 | return MP_READ_E;
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| 301 | }
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| 302 |
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| 303 | eSz = mp_unsigned_bin_size(&(key->e));
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| 304 | if (eSz > MAX_E_SIZE) {
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| 305 | WOLFSSL_MSG("Exponent of size 4 bytes expected");
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| 306 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 307 | return BAD_FUNC_ARG;
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| 308 | }
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| 309 |
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| 310 | if (mp_to_unsigned_bin(&(key->e), (byte*)&e + (MAX_E_SIZE - eSz))
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| 311 | != MP_OKAY) {
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| 312 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 313 | WOLFSSL_MSG("Unable to get RSA key exponent");
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| 314 | return MP_READ_E;
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| 315 | }
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| 316 |
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| 317 | /* check for existing mod buffer to avoid memory leak */
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| 318 | if (key->mod != NULL) {
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| 319 | XFREE(key->mod, key->heap, DYNAMIC_TYPE_KEY);
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| 320 | }
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| 321 |
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| 322 | key->pubExp = e;
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| 323 | key->mod = m;
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| 324 |
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| 325 | if (XSecure_RsaInitialize(&(key->xRsa), key->mod, NULL,
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| 326 | (byte*)&(key->pubExp)) != XST_SUCCESS) {
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| 327 | WOLFSSL_MSG("Unable to initialize RSA on hardware");
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| 328 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 329 | return BAD_STATE_E;
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| 330 | }
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| 331 |
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| 332 | #ifdef WOLFSSL_XILINX_PATCH
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| 333 | /* currently a patch of xsecure_rsa.c for 2048 bit keys */
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| 334 | if (wc_RsaEncryptSize(key) == 256) {
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| 335 | if (XSecure_RsaSetSize(&(key->xRsa), 2048) != XST_SUCCESS) {
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| 336 | WOLFSSL_MSG("Unable to set RSA key size on hardware");
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| 337 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
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| 338 | return BAD_STATE_E;
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| 339 | }
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| 340 | }
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| 341 | #endif
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| 342 |
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| 343 | return 0;
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| 344 | }
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| 345 | #endif /* WOLFSSL_XILINX_CRYPT */
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| 346 |
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| 347 | int wc_FreeRsaKey(RsaKey* key)
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| 348 | {
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| 349 | int ret = 0;
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| 350 |
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| 351 | if (key == NULL) {
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| 352 | return BAD_FUNC_ARG;
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| 353 | }
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| 354 |
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| 355 | wc_RsaCleanup(key);
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| 356 |
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| 357 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
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| 358 | wolfAsync_DevCtxFree(&key->asyncDev, WOLFSSL_ASYNC_MARKER_RSA);
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| 359 | #endif
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| 360 |
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| 361 | if (key->type == RSA_PRIVATE) {
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| 362 | mp_forcezero(&key->u);
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| 363 | mp_forcezero(&key->dQ);
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| 364 | mp_forcezero(&key->dP);
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| 365 | mp_forcezero(&key->q);
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| 366 | mp_forcezero(&key->p);
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| 367 | mp_forcezero(&key->d);
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| 368 | }
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| 369 | /* private part */
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| 370 | mp_clear(&key->u);
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| 371 | mp_clear(&key->dQ);
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| 372 | mp_clear(&key->dP);
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| 373 | mp_clear(&key->q);
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| 374 | mp_clear(&key->p);
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| 375 | mp_clear(&key->d);
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| 376 |
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| 377 | /* public part */
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| 378 | mp_clear(&key->e);
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| 379 | mp_clear(&key->n);
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| 380 |
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| 381 | #ifdef WOLFSSL_XILINX_CRYPT
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| 382 | XFREE(key->mod, key->heap, DYNAMIC_TYPE_KEY);
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| 383 | key->mod = NULL;
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| 384 | #endif
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| 385 |
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| 386 | return ret;
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| 387 | }
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| 388 |
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| 389 |
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| 390 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_PSS)
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| 391 | /* Uses MGF1 standard as a mask generation function
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| 392 | hType: hash type used
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| 393 | seed: seed to use for generating mask
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| 394 | seedSz: size of seed buffer
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| 395 | out: mask output after generation
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| 396 | outSz: size of output buffer
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| 397 | */
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| 398 | static int RsaMGF1(enum wc_HashType hType, byte* seed, word32 seedSz,
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| 399 | byte* out, word32 outSz, void* heap)
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| 400 | {
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| 401 | byte* tmp;
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| 402 | /* needs to be large enough for seed size plus counter(4) */
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| 403 | byte tmpA[WC_MAX_DIGEST_SIZE + 4];
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| 404 | byte tmpF; /* 1 if dynamic memory needs freed */
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| 405 | word32 tmpSz;
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| 406 | int hLen;
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| 407 | int ret;
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| 408 | word32 counter;
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| 409 | word32 idx;
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| 410 | hLen = wc_HashGetDigestSize(hType);
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| 411 | counter = 0;
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| 412 | idx = 0;
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| 413 |
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| 414 | (void)heap;
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| 415 |
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| 416 | /* check error return of wc_HashGetDigestSize */
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| 417 | if (hLen < 0) {
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| 418 | return hLen;
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| 419 | }
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| 420 |
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| 421 | /* if tmp is not large enough than use some dynamic memory */
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| 422 | if ((seedSz + 4) > sizeof(tmpA) || (word32)hLen > sizeof(tmpA)) {
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| 423 | /* find largest amount of memory needed which will be the max of
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| 424 | * hLen and (seedSz + 4) since tmp is used to store the hash digest */
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| 425 | tmpSz = ((seedSz + 4) > (word32)hLen)? seedSz + 4: (word32)hLen;
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| 426 | tmp = (byte*)XMALLOC(tmpSz, heap, DYNAMIC_TYPE_RSA_BUFFER);
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| 427 | if (tmp == NULL) {
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| 428 | return MEMORY_E;
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| 429 | }
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| 430 | tmpF = 1; /* make sure to free memory when done */
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| 431 | }
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| 432 | else {
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| 433 | /* use array on the stack */
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| 434 | tmpSz = sizeof(tmpA);
|
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| 435 | tmp = tmpA;
|
---|
| 436 | tmpF = 0; /* no need to free memory at end */
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | do {
|
---|
| 440 | int i = 0;
|
---|
| 441 | XMEMCPY(tmp, seed, seedSz);
|
---|
| 442 |
|
---|
| 443 | /* counter to byte array appended to tmp */
|
---|
| 444 | tmp[seedSz] = (counter >> 24) & 0xFF;
|
---|
| 445 | tmp[seedSz + 1] = (counter >> 16) & 0xFF;
|
---|
| 446 | tmp[seedSz + 2] = (counter >> 8) & 0xFF;
|
---|
| 447 | tmp[seedSz + 3] = (counter) & 0xFF;
|
---|
| 448 |
|
---|
| 449 | /* hash and append to existing output */
|
---|
| 450 | if ((ret = wc_Hash(hType, tmp, (seedSz + 4), tmp, tmpSz)) != 0) {
|
---|
| 451 | /* check for if dynamic memory was needed, then free */
|
---|
| 452 | if (tmpF) {
|
---|
| 453 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 454 | }
|
---|
| 455 | return ret;
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | for (i = 0; i < hLen && idx < outSz; i++) {
|
---|
| 459 | out[idx++] = tmp[i];
|
---|
| 460 | }
|
---|
| 461 | counter++;
|
---|
| 462 | } while (idx < outSz);
|
---|
| 463 |
|
---|
| 464 | /* check for if dynamic memory was needed, then free */
|
---|
| 465 | if (tmpF) {
|
---|
| 466 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 467 | }
|
---|
| 468 |
|
---|
| 469 | return 0;
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 | /* helper function to direct which mask generation function is used
|
---|
| 473 | switeched on type input
|
---|
| 474 | */
|
---|
| 475 | static int RsaMGF(int type, byte* seed, word32 seedSz, byte* out,
|
---|
| 476 | word32 outSz, void* heap)
|
---|
| 477 | {
|
---|
| 478 | int ret;
|
---|
| 479 |
|
---|
| 480 | switch(type) {
|
---|
| 481 | #ifndef NO_SHA
|
---|
| 482 | case WC_MGF1SHA1:
|
---|
| 483 | ret = RsaMGF1(WC_HASH_TYPE_SHA, seed, seedSz, out, outSz, heap);
|
---|
| 484 | break;
|
---|
| 485 | #endif
|
---|
| 486 | #ifndef NO_SHA256
|
---|
| 487 | #ifdef WOLFSSL_SHA224
|
---|
| 488 | case WC_MGF1SHA224:
|
---|
| 489 | ret = RsaMGF1(WC_HASH_TYPE_SHA224, seed, seedSz, out, outSz, heap);
|
---|
| 490 | break;
|
---|
| 491 | #endif
|
---|
| 492 | case WC_MGF1SHA256:
|
---|
| 493 | ret = RsaMGF1(WC_HASH_TYPE_SHA256, seed, seedSz, out, outSz, heap);
|
---|
| 494 | break;
|
---|
| 495 | #endif
|
---|
| 496 | #ifdef WOLFSSL_SHA512
|
---|
| 497 | #ifdef WOLFSSL_SHA384
|
---|
| 498 | case WC_MGF1SHA384:
|
---|
| 499 | ret = RsaMGF1(WC_HASH_TYPE_SHA384, seed, seedSz, out, outSz, heap);
|
---|
| 500 | break;
|
---|
| 501 | #endif
|
---|
| 502 | case WC_MGF1SHA512:
|
---|
| 503 | ret = RsaMGF1(WC_HASH_TYPE_SHA512, seed, seedSz, out, outSz, heap);
|
---|
| 504 | break;
|
---|
| 505 | #endif
|
---|
| 506 | default:
|
---|
| 507 | WOLFSSL_MSG("Unknown MGF type: check build options");
|
---|
| 508 | ret = BAD_FUNC_ARG;
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | /* in case of default avoid unused warning */
|
---|
| 512 | (void)seed;
|
---|
| 513 | (void)seedSz;
|
---|
| 514 | (void)out;
|
---|
| 515 | (void)outSz;
|
---|
| 516 | (void)heap;
|
---|
| 517 |
|
---|
| 518 | return ret;
|
---|
| 519 | }
|
---|
| 520 | #endif /* !WC_NO_RSA_OAEP */
|
---|
| 521 |
|
---|
| 522 |
|
---|
| 523 | /* Padding */
|
---|
| 524 | #ifndef WC_NO_RSA_OAEP
|
---|
| 525 | static int RsaPad_OAEP(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 526 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng,
|
---|
| 527 | enum wc_HashType hType, int mgf, byte* optLabel, word32 labelLen,
|
---|
| 528 | void* heap)
|
---|
| 529 | {
|
---|
| 530 | int ret;
|
---|
| 531 | int hLen;
|
---|
| 532 | int psLen;
|
---|
| 533 | int i;
|
---|
| 534 | word32 idx;
|
---|
| 535 |
|
---|
| 536 | byte* dbMask;
|
---|
| 537 |
|
---|
| 538 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 539 | byte* lHash = NULL;
|
---|
| 540 | byte* seed = NULL;
|
---|
| 541 | #else
|
---|
| 542 | /* must be large enough to contain largest hash */
|
---|
| 543 | byte lHash[WC_MAX_DIGEST_SIZE];
|
---|
| 544 | byte seed[ WC_MAX_DIGEST_SIZE];
|
---|
| 545 | #endif
|
---|
| 546 |
|
---|
| 547 | /* no label is allowed, but catch if no label provided and length > 0 */
|
---|
| 548 | if (optLabel == NULL && labelLen > 0) {
|
---|
| 549 | return BUFFER_E;
|
---|
| 550 | }
|
---|
| 551 |
|
---|
| 552 | /* limit of label is the same as limit of hash function which is massive */
|
---|
| 553 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 554 | if (hLen < 0) {
|
---|
| 555 | return hLen;
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 559 | lHash = (byte*)XMALLOC(hLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 560 | if (lHash == NULL) {
|
---|
| 561 | return MEMORY_E;
|
---|
| 562 | }
|
---|
| 563 | seed = (byte*)XMALLOC(hLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 564 | if (seed == NULL) {
|
---|
| 565 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 566 | return MEMORY_E;
|
---|
| 567 | }
|
---|
| 568 | #else
|
---|
| 569 | /* hLen should never be larger than lHash since size is max digest size,
|
---|
| 570 | but check before blindly calling wc_Hash */
|
---|
| 571 | if ((word32)hLen > sizeof(lHash)) {
|
---|
| 572 | WOLFSSL_MSG("OAEP lHash to small for digest!!");
|
---|
| 573 | return MEMORY_E;
|
---|
| 574 | }
|
---|
| 575 | #endif
|
---|
| 576 |
|
---|
| 577 | if ((ret = wc_Hash(hType, optLabel, labelLen, lHash, hLen)) != 0) {
|
---|
| 578 | WOLFSSL_MSG("OAEP hash type possibly not supported or lHash to small");
|
---|
| 579 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 580 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 581 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 582 | #endif
|
---|
| 583 | return ret;
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | /* handles check of location for idx as well as psLen, cast to int to check
|
---|
| 587 | for pkcsBlockLen(k) - 2 * hLen - 2 being negative
|
---|
| 588 | This check is similar to decryption where k > 2 * hLen + 2 as msg
|
---|
| 589 | size approaches 0. In decryption if k is less than or equal -- then there
|
---|
| 590 | is no possible room for msg.
|
---|
| 591 | k = RSA key size
|
---|
| 592 | hLen = hash digest size -- will always be >= 0 at this point
|
---|
| 593 | */
|
---|
| 594 | if ((word32)(2 * hLen + 2) > pkcsBlockLen) {
|
---|
| 595 | WOLFSSL_MSG("OAEP pad error hash to big for RSA key size");
|
---|
| 596 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 597 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 598 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 599 | #endif
|
---|
| 600 | return BAD_FUNC_ARG;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | if (inputLen > (pkcsBlockLen - 2 * hLen - 2)) {
|
---|
| 604 | WOLFSSL_MSG("OAEP pad error message too long");
|
---|
| 605 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 606 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 607 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 608 | #endif
|
---|
| 609 | return BAD_FUNC_ARG;
|
---|
| 610 | }
|
---|
| 611 |
|
---|
| 612 | /* concatenate lHash || PS || 0x01 || msg */
|
---|
| 613 | idx = pkcsBlockLen - 1 - inputLen;
|
---|
| 614 | psLen = pkcsBlockLen - inputLen - 2 * hLen - 2;
|
---|
| 615 | if (pkcsBlockLen < inputLen) { /*make sure not writing over end of buffer */
|
---|
| 616 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 617 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 618 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 619 | #endif
|
---|
| 620 | return BUFFER_E;
|
---|
| 621 | }
|
---|
| 622 | XMEMCPY(pkcsBlock + (pkcsBlockLen - inputLen), input, inputLen);
|
---|
| 623 | pkcsBlock[idx--] = 0x01; /* PS and M separator */
|
---|
| 624 | while (psLen > 0 && idx > 0) {
|
---|
| 625 | pkcsBlock[idx--] = 0x00;
|
---|
| 626 | psLen--;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | idx = idx - hLen + 1;
|
---|
| 630 | XMEMCPY(pkcsBlock + idx, lHash, hLen);
|
---|
| 631 |
|
---|
| 632 | /* generate random seed */
|
---|
| 633 | if ((ret = wc_RNG_GenerateBlock(rng, seed, hLen)) != 0) {
|
---|
| 634 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 635 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 636 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 637 | #endif
|
---|
| 638 | return ret;
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | /* create maskedDB from dbMask */
|
---|
| 642 | dbMask = (byte*)XMALLOC(pkcsBlockLen - hLen - 1, heap, DYNAMIC_TYPE_RSA);
|
---|
| 643 | if (dbMask == NULL) {
|
---|
| 644 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 645 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 646 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 647 | #endif
|
---|
| 648 | return MEMORY_E;
|
---|
| 649 | }
|
---|
| 650 | XMEMSET(dbMask, 0, pkcsBlockLen - hLen - 1); /* help static analyzer */
|
---|
| 651 |
|
---|
| 652 | ret = RsaMGF(mgf, seed, hLen, dbMask, pkcsBlockLen - hLen - 1, heap);
|
---|
| 653 | if (ret != 0) {
|
---|
| 654 | XFREE(dbMask, heap, DYNAMIC_TYPE_RSA);
|
---|
| 655 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 656 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 657 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 658 | #endif
|
---|
| 659 | return ret;
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | i = 0;
|
---|
| 663 | idx = hLen + 1;
|
---|
| 664 | while (idx < pkcsBlockLen && (word32)i < (pkcsBlockLen - hLen -1)) {
|
---|
| 665 | pkcsBlock[idx] = dbMask[i++] ^ pkcsBlock[idx];
|
---|
| 666 | idx++;
|
---|
| 667 | }
|
---|
| 668 | XFREE(dbMask, heap, DYNAMIC_TYPE_RSA);
|
---|
| 669 |
|
---|
| 670 |
|
---|
| 671 | /* create maskedSeed from seedMask */
|
---|
| 672 | idx = 0;
|
---|
| 673 | pkcsBlock[idx++] = 0x00;
|
---|
| 674 | /* create seedMask inline */
|
---|
| 675 | if ((ret = RsaMGF(mgf, pkcsBlock + hLen + 1, pkcsBlockLen - hLen - 1,
|
---|
| 676 | pkcsBlock + 1, hLen, heap)) != 0) {
|
---|
| 677 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 678 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 679 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 680 | #endif
|
---|
| 681 | return ret;
|
---|
| 682 | }
|
---|
| 683 |
|
---|
| 684 | /* xor created seedMask with seed to make maskedSeed */
|
---|
| 685 | i = 0;
|
---|
| 686 | while (idx < (word32)(hLen + 1) && i < hLen) {
|
---|
| 687 | pkcsBlock[idx] = pkcsBlock[idx] ^ seed[i++];
|
---|
| 688 | idx++;
|
---|
| 689 | }
|
---|
| 690 |
|
---|
| 691 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 692 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 693 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 694 | #endif
|
---|
| 695 | (void)padValue;
|
---|
| 696 |
|
---|
| 697 | return 0;
|
---|
| 698 | }
|
---|
| 699 | #endif /* !WC_NO_RSA_OAEP */
|
---|
| 700 |
|
---|
| 701 | #ifdef WC_RSA_PSS
|
---|
| 702 | /* 0x00 .. 0x00 0x01 | Salt | Gen Hash | 0xbc
|
---|
| 703 | * XOR MGF over all bytes down to end of Salt
|
---|
| 704 | * Gen Hash = HASH(8 * 0x00 | Message Hash | Salt)
|
---|
| 705 | */
|
---|
| 706 | static int RsaPad_PSS(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 707 | word32 pkcsBlockLen, WC_RNG* rng, enum wc_HashType hType, int mgf,
|
---|
| 708 | int bits, void* heap)
|
---|
| 709 | {
|
---|
| 710 | int ret;
|
---|
| 711 | int hLen, i;
|
---|
| 712 | byte* s;
|
---|
| 713 | byte* m;
|
---|
| 714 | byte* h;
|
---|
| 715 | byte salt[WC_MAX_DIGEST_SIZE];
|
---|
| 716 |
|
---|
| 717 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 718 | if (hLen < 0)
|
---|
| 719 | return hLen;
|
---|
| 720 |
|
---|
| 721 | s = m = pkcsBlock;
|
---|
| 722 | XMEMSET(m, 0, 8);
|
---|
| 723 | m += 8;
|
---|
| 724 | XMEMCPY(m, input, inputLen);
|
---|
| 725 | m += inputLen;
|
---|
| 726 | if ((ret = wc_RNG_GenerateBlock(rng, salt, hLen)) != 0)
|
---|
| 727 | return ret;
|
---|
| 728 | XMEMCPY(m, salt, hLen);
|
---|
| 729 | m += hLen;
|
---|
| 730 |
|
---|
| 731 | h = pkcsBlock + pkcsBlockLen - 1 - hLen;
|
---|
| 732 | if ((ret = wc_Hash(hType, s, (word32)(m - s), h, hLen)) != 0)
|
---|
| 733 | return ret;
|
---|
| 734 | pkcsBlock[pkcsBlockLen - 1] = 0xbc;
|
---|
| 735 |
|
---|
| 736 | ret = RsaMGF(mgf, h, hLen, pkcsBlock, pkcsBlockLen - hLen - 1, heap);
|
---|
| 737 | if (ret != 0)
|
---|
| 738 | return ret;
|
---|
| 739 | pkcsBlock[0] &= (1 << ((bits - 1) & 0x7)) - 1;
|
---|
| 740 |
|
---|
| 741 | m = pkcsBlock + pkcsBlockLen - 1 - hLen - hLen - 1;
|
---|
| 742 | *(m++) ^= 0x01;
|
---|
| 743 | for (i = 0; i < hLen; i++)
|
---|
| 744 | m[i] ^= salt[i];
|
---|
| 745 |
|
---|
| 746 | return 0;
|
---|
| 747 | }
|
---|
| 748 | #endif
|
---|
| 749 |
|
---|
| 750 | static int RsaPad(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 751 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng)
|
---|
| 752 | {
|
---|
| 753 | if (input == NULL || inputLen == 0 || pkcsBlock == NULL ||
|
---|
| 754 | pkcsBlockLen == 0) {
|
---|
| 755 | return BAD_FUNC_ARG;
|
---|
| 756 | }
|
---|
| 757 |
|
---|
| 758 | pkcsBlock[0] = 0x0; /* set first byte to zero and advance */
|
---|
| 759 | pkcsBlock++; pkcsBlockLen--;
|
---|
| 760 | pkcsBlock[0] = padValue; /* insert padValue */
|
---|
| 761 |
|
---|
| 762 | if (padValue == RSA_BLOCK_TYPE_1) {
|
---|
| 763 | if (pkcsBlockLen < inputLen + 2) {
|
---|
| 764 | WOLFSSL_MSG("RsaPad error, invalid length");
|
---|
| 765 | return RSA_PAD_E;
|
---|
| 766 | }
|
---|
| 767 |
|
---|
| 768 | /* pad with 0xff bytes */
|
---|
| 769 | XMEMSET(&pkcsBlock[1], 0xFF, pkcsBlockLen - inputLen - 2);
|
---|
| 770 | }
|
---|
| 771 | else {
|
---|
| 772 | /* pad with non-zero random bytes */
|
---|
| 773 | word32 padLen, i;
|
---|
| 774 | int ret;
|
---|
| 775 |
|
---|
| 776 | if (pkcsBlockLen < inputLen + 1) {
|
---|
| 777 | WOLFSSL_MSG("RsaPad error, invalid length");
|
---|
| 778 | return RSA_PAD_E;
|
---|
| 779 | }
|
---|
| 780 |
|
---|
| 781 | padLen = pkcsBlockLen - inputLen - 1;
|
---|
| 782 | ret = wc_RNG_GenerateBlock(rng, &pkcsBlock[1], padLen);
|
---|
| 783 | if (ret != 0) {
|
---|
| 784 | return ret;
|
---|
| 785 | }
|
---|
| 786 |
|
---|
| 787 | /* remove zeros */
|
---|
| 788 | for (i = 1; i < padLen; i++) {
|
---|
| 789 | if (pkcsBlock[i] == 0) pkcsBlock[i] = 0x01;
|
---|
| 790 | }
|
---|
| 791 | }
|
---|
| 792 |
|
---|
| 793 | pkcsBlock[pkcsBlockLen-inputLen-1] = 0; /* separator */
|
---|
| 794 | XMEMCPY(pkcsBlock+pkcsBlockLen-inputLen, input, inputLen);
|
---|
| 795 |
|
---|
| 796 | return 0;
|
---|
| 797 | }
|
---|
| 798 |
|
---|
| 799 | /* helper function to direct which padding is used */
|
---|
| 800 | static int wc_RsaPad_ex(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
| 801 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng, int padType,
|
---|
| 802 | enum wc_HashType hType, int mgf, byte* optLabel, word32 labelLen, int bits,
|
---|
| 803 | void* heap)
|
---|
| 804 | {
|
---|
| 805 | int ret;
|
---|
| 806 |
|
---|
| 807 | switch (padType)
|
---|
| 808 | {
|
---|
| 809 | case WC_RSA_PKCSV15_PAD:
|
---|
| 810 | /*WOLFSSL_MSG("wolfSSL Using RSA PKCSV15 padding");*/
|
---|
| 811 | ret = RsaPad(input, inputLen, pkcsBlock, pkcsBlockLen,
|
---|
| 812 | padValue, rng);
|
---|
| 813 | break;
|
---|
| 814 |
|
---|
| 815 | #ifndef WC_NO_RSA_OAEP
|
---|
| 816 | case WC_RSA_OAEP_PAD:
|
---|
| 817 | WOLFSSL_MSG("wolfSSL Using RSA OAEP padding");
|
---|
| 818 | ret = RsaPad_OAEP(input, inputLen, pkcsBlock, pkcsBlockLen,
|
---|
| 819 | padValue, rng, hType, mgf, optLabel, labelLen, heap);
|
---|
| 820 | break;
|
---|
| 821 | #endif
|
---|
| 822 |
|
---|
| 823 | #ifdef WC_RSA_PSS
|
---|
| 824 | case WC_RSA_PSS_PAD:
|
---|
| 825 | WOLFSSL_MSG("wolfSSL Using RSA PSS padding");
|
---|
| 826 | ret = RsaPad_PSS(input, inputLen, pkcsBlock, pkcsBlockLen, rng,
|
---|
| 827 | hType, mgf, bits, heap);
|
---|
| 828 | break;
|
---|
| 829 | #endif
|
---|
| 830 |
|
---|
| 831 | default:
|
---|
| 832 | WOLFSSL_MSG("Unknown RSA Pad Type");
|
---|
| 833 | ret = RSA_PAD_E;
|
---|
| 834 | }
|
---|
| 835 |
|
---|
| 836 | /* silence warning if not used with padding scheme */
|
---|
| 837 | (void)hType;
|
---|
| 838 | (void)mgf;
|
---|
| 839 | (void)optLabel;
|
---|
| 840 | (void)labelLen;
|
---|
| 841 | (void)bits;
|
---|
| 842 | (void)heap;
|
---|
| 843 |
|
---|
| 844 | return ret;
|
---|
| 845 | }
|
---|
| 846 |
|
---|
| 847 |
|
---|
| 848 | /* UnPadding */
|
---|
| 849 | #ifndef WC_NO_RSA_OAEP
|
---|
| 850 | /* UnPad plaintext, set start to *output, return length of plaintext,
|
---|
| 851 | * < 0 on error */
|
---|
| 852 | static int RsaUnPad_OAEP(byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
| 853 | byte **output, enum wc_HashType hType, int mgf,
|
---|
| 854 | byte* optLabel, word32 labelLen, void* heap)
|
---|
| 855 | {
|
---|
| 856 | int hLen;
|
---|
| 857 | int ret;
|
---|
| 858 | byte h[WC_MAX_DIGEST_SIZE]; /* max digest size */
|
---|
| 859 | byte* tmp;
|
---|
| 860 | word32 idx;
|
---|
| 861 |
|
---|
| 862 | /* no label is allowed, but catch if no label provided and length > 0 */
|
---|
| 863 | if (optLabel == NULL && labelLen > 0) {
|
---|
| 864 | return BUFFER_E;
|
---|
| 865 | }
|
---|
| 866 |
|
---|
| 867 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 868 | if ((hLen < 0) || (pkcsBlockLen < (2 * (word32)hLen + 2))) {
|
---|
| 869 | return BAD_FUNC_ARG;
|
---|
| 870 | }
|
---|
| 871 |
|
---|
| 872 | tmp = (byte*)XMALLOC(pkcsBlockLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 873 | if (tmp == NULL) {
|
---|
| 874 | return MEMORY_E;
|
---|
| 875 | }
|
---|
| 876 | XMEMSET(tmp, 0, pkcsBlockLen);
|
---|
| 877 |
|
---|
| 878 | /* find seedMask value */
|
---|
| 879 | if ((ret = RsaMGF(mgf, (byte*)(pkcsBlock + (hLen + 1)),
|
---|
| 880 | pkcsBlockLen - hLen - 1, tmp, hLen, heap)) != 0) {
|
---|
| 881 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 882 | return ret;
|
---|
| 883 | }
|
---|
| 884 |
|
---|
| 885 | /* xor seedMask value with maskedSeed to get seed value */
|
---|
| 886 | for (idx = 0; idx < (word32)hLen; idx++) {
|
---|
| 887 | tmp[idx] = tmp[idx] ^ pkcsBlock[1 + idx];
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | /* get dbMask value */
|
---|
| 891 | if ((ret = RsaMGF(mgf, tmp, hLen, tmp + hLen,
|
---|
| 892 | pkcsBlockLen - hLen - 1, heap)) != 0) {
|
---|
| 893 | XFREE(tmp, NULL, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 894 | return ret;
|
---|
| 895 | }
|
---|
| 896 |
|
---|
| 897 | /* get DB value by doing maskedDB xor dbMask */
|
---|
| 898 | for (idx = 0; idx < (pkcsBlockLen - hLen - 1); idx++) {
|
---|
| 899 | pkcsBlock[hLen + 1 + idx] = pkcsBlock[hLen + 1 + idx] ^ tmp[idx + hLen];
|
---|
| 900 | }
|
---|
| 901 |
|
---|
| 902 | /* done with use of tmp buffer */
|
---|
| 903 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 904 |
|
---|
| 905 | /* advance idx to index of PS and msg separator, account for PS size of 0*/
|
---|
| 906 | idx = hLen + 1 + hLen;
|
---|
| 907 | while (idx < pkcsBlockLen && pkcsBlock[idx] == 0) {idx++;}
|
---|
| 908 |
|
---|
| 909 | /* create hash of label for comparison with hash sent */
|
---|
| 910 | if ((ret = wc_Hash(hType, optLabel, labelLen, h, hLen)) != 0) {
|
---|
| 911 | return ret;
|
---|
| 912 | }
|
---|
| 913 |
|
---|
| 914 | /* say no to chosen ciphertext attack.
|
---|
| 915 | Comparison of lHash, Y, and separator value needs to all happen in
|
---|
| 916 | constant time.
|
---|
| 917 | Attackers should not be able to get error condition from the timing of
|
---|
| 918 | these checks.
|
---|
| 919 | */
|
---|
| 920 | ret = 0;
|
---|
| 921 | ret |= ConstantCompare(pkcsBlock + hLen + 1, h, hLen);
|
---|
| 922 | ret += pkcsBlock[idx++] ^ 0x01; /* separator value is 0x01 */
|
---|
| 923 | ret += pkcsBlock[0] ^ 0x00; /* Y, the first value, should be 0 */
|
---|
| 924 |
|
---|
| 925 | if (ret != 0) {
|
---|
| 926 | WOLFSSL_MSG("RsaUnPad_OAEP: Padding Error");
|
---|
| 927 | return BAD_PADDING_E;
|
---|
| 928 | }
|
---|
| 929 |
|
---|
| 930 | /* adjust pointer to correct location in array and return size of M */
|
---|
| 931 | *output = (byte*)(pkcsBlock + idx);
|
---|
| 932 | return pkcsBlockLen - idx;
|
---|
| 933 | }
|
---|
| 934 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 935 |
|
---|
| 936 | #ifdef WC_RSA_PSS
|
---|
| 937 | static int RsaUnPad_PSS(byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
| 938 | byte **output, enum wc_HashType hType, int mgf,
|
---|
| 939 | int bits, void* heap)
|
---|
| 940 | {
|
---|
| 941 | int ret;
|
---|
| 942 | byte* tmp;
|
---|
| 943 | int hLen, i;
|
---|
| 944 |
|
---|
| 945 | hLen = wc_HashGetDigestSize(hType);
|
---|
| 946 | if (hLen < 0)
|
---|
| 947 | return hLen;
|
---|
| 948 |
|
---|
| 949 | if (pkcsBlock[pkcsBlockLen - 1] != 0xbc) {
|
---|
| 950 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error 0xBC");
|
---|
| 951 | return BAD_PADDING_E;
|
---|
| 952 | }
|
---|
| 953 |
|
---|
| 954 | tmp = (byte*)XMALLOC(pkcsBlockLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 955 | if (tmp == NULL) {
|
---|
| 956 | return MEMORY_E;
|
---|
| 957 | }
|
---|
| 958 |
|
---|
| 959 | if ((ret = RsaMGF(mgf, pkcsBlock + pkcsBlockLen - 1 - hLen, hLen,
|
---|
| 960 | tmp, pkcsBlockLen - 1 - hLen, heap)) != 0) {
|
---|
| 961 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 962 | return ret;
|
---|
| 963 | }
|
---|
| 964 |
|
---|
| 965 | tmp[0] &= (1 << ((bits - 1) & 0x7)) - 1;
|
---|
| 966 | for (i = 0; i < (int)(pkcsBlockLen - 1 - hLen - hLen - 1); i++) {
|
---|
| 967 | if (tmp[i] != pkcsBlock[i]) {
|
---|
| 968 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 969 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error Match");
|
---|
| 970 | return BAD_PADDING_E;
|
---|
| 971 | }
|
---|
| 972 | }
|
---|
| 973 | if (tmp[i] != (pkcsBlock[i] ^ 0x01)) {
|
---|
| 974 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 975 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error End");
|
---|
| 976 | return BAD_PADDING_E;
|
---|
| 977 | }
|
---|
| 978 | for (i++; i < (int)(pkcsBlockLen - 1 - hLen); i++)
|
---|
| 979 | pkcsBlock[i] ^= tmp[i];
|
---|
| 980 |
|
---|
| 981 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
| 982 |
|
---|
| 983 | i = pkcsBlockLen - (RSA_PSS_PAD_SZ + 3 * hLen + 1);
|
---|
| 984 | XMEMSET(pkcsBlock + i, 0, RSA_PSS_PAD_SZ);
|
---|
| 985 |
|
---|
| 986 | *output = pkcsBlock + i;
|
---|
| 987 | return RSA_PSS_PAD_SZ + 3 * hLen;
|
---|
| 988 | }
|
---|
| 989 | #endif
|
---|
| 990 |
|
---|
| 991 | /* UnPad plaintext, set start to *output, return length of plaintext,
|
---|
| 992 | * < 0 on error */
|
---|
| 993 | static int RsaUnPad(const byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
| 994 | byte **output, byte padValue)
|
---|
| 995 | {
|
---|
| 996 | word32 maxOutputLen = (pkcsBlockLen > 10) ? (pkcsBlockLen - 10) : 0;
|
---|
| 997 | word32 invalid = 0;
|
---|
| 998 | word32 i = 1;
|
---|
| 999 | word32 outputLen;
|
---|
| 1000 |
|
---|
| 1001 | if (output == NULL || pkcsBlockLen == 0) {
|
---|
| 1002 | return BAD_FUNC_ARG;
|
---|
| 1003 | }
|
---|
| 1004 |
|
---|
| 1005 | if (pkcsBlock[0] != 0x0) { /* skip past zero */
|
---|
| 1006 | invalid = 1;
|
---|
| 1007 | }
|
---|
| 1008 | pkcsBlock++; pkcsBlockLen--;
|
---|
| 1009 |
|
---|
| 1010 | /* Require block type padValue */
|
---|
| 1011 | invalid = (pkcsBlock[0] != padValue) || invalid;
|
---|
| 1012 |
|
---|
| 1013 | /* verify the padding until we find the separator */
|
---|
| 1014 | if (padValue == RSA_BLOCK_TYPE_1) {
|
---|
| 1015 | while (i<pkcsBlockLen && pkcsBlock[i++] == 0xFF) {/* Null body */}
|
---|
| 1016 | }
|
---|
| 1017 | else {
|
---|
| 1018 | while (i<pkcsBlockLen && pkcsBlock[i++]) {/* Null body */}
|
---|
| 1019 | }
|
---|
| 1020 |
|
---|
| 1021 | if (!(i==pkcsBlockLen || pkcsBlock[i-1]==0)) {
|
---|
| 1022 | WOLFSSL_MSG("RsaUnPad error, bad formatting");
|
---|
| 1023 | return RSA_PAD_E;
|
---|
| 1024 | }
|
---|
| 1025 |
|
---|
| 1026 | outputLen = pkcsBlockLen - i;
|
---|
| 1027 | invalid = (outputLen > maxOutputLen) || invalid;
|
---|
| 1028 |
|
---|
| 1029 | if (invalid) {
|
---|
| 1030 | WOLFSSL_MSG("RsaUnPad error, invalid formatting");
|
---|
| 1031 | return RSA_PAD_E;
|
---|
| 1032 | }
|
---|
| 1033 |
|
---|
| 1034 | *output = (byte *)(pkcsBlock + i);
|
---|
| 1035 | return outputLen;
|
---|
| 1036 | }
|
---|
| 1037 |
|
---|
| 1038 | /* helper function to direct unpadding */
|
---|
| 1039 | static int wc_RsaUnPad_ex(byte* pkcsBlock, word32 pkcsBlockLen, byte** out,
|
---|
| 1040 | byte padValue, int padType, enum wc_HashType hType,
|
---|
| 1041 | int mgf, byte* optLabel, word32 labelLen, int bits,
|
---|
| 1042 | void* heap)
|
---|
| 1043 | {
|
---|
| 1044 | int ret;
|
---|
| 1045 |
|
---|
| 1046 | switch (padType) {
|
---|
| 1047 | case WC_RSA_PKCSV15_PAD:
|
---|
| 1048 | /*WOLFSSL_MSG("wolfSSL Using RSA PKCSV15 un-padding");*/
|
---|
| 1049 | ret = RsaUnPad(pkcsBlock, pkcsBlockLen, out, padValue);
|
---|
| 1050 | break;
|
---|
| 1051 |
|
---|
| 1052 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1053 | case WC_RSA_OAEP_PAD:
|
---|
| 1054 | WOLFSSL_MSG("wolfSSL Using RSA OAEP un-padding");
|
---|
| 1055 | ret = RsaUnPad_OAEP((byte*)pkcsBlock, pkcsBlockLen, out,
|
---|
| 1056 | hType, mgf, optLabel, labelLen, heap);
|
---|
| 1057 | break;
|
---|
| 1058 | #endif
|
---|
| 1059 |
|
---|
| 1060 | #ifdef WC_RSA_PSS
|
---|
| 1061 | case WC_RSA_PSS_PAD:
|
---|
| 1062 | WOLFSSL_MSG("wolfSSL Using RSA PSS un-padding");
|
---|
| 1063 | ret = RsaUnPad_PSS((byte*)pkcsBlock, pkcsBlockLen, out, hType, mgf,
|
---|
| 1064 | bits, heap);
|
---|
| 1065 | break;
|
---|
| 1066 | #endif
|
---|
| 1067 |
|
---|
| 1068 | default:
|
---|
| 1069 | WOLFSSL_MSG("Unknown RSA UnPad Type");
|
---|
| 1070 | ret = RSA_PAD_E;
|
---|
| 1071 | }
|
---|
| 1072 |
|
---|
| 1073 | /* silence warning if not used with padding scheme */
|
---|
| 1074 | (void)hType;
|
---|
| 1075 | (void)mgf;
|
---|
| 1076 | (void)optLabel;
|
---|
| 1077 | (void)labelLen;
|
---|
| 1078 | (void)bits;
|
---|
| 1079 | (void)heap;
|
---|
| 1080 |
|
---|
| 1081 | return ret;
|
---|
| 1082 | }
|
---|
| 1083 |
|
---|
| 1084 | #if defined(WOLFSSL_XILINX_CRYPT)
|
---|
| 1085 | /*
|
---|
| 1086 | * Xilinx hardened crypto acceleration.
|
---|
| 1087 | *
|
---|
| 1088 | * Returns 0 on success and negative values on error.
|
---|
| 1089 | */
|
---|
| 1090 | static int wc_RsaFunctionXil(const byte* in, word32 inLen, byte* out,
|
---|
| 1091 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 1092 | {
|
---|
| 1093 | int ret = 0;
|
---|
| 1094 | word32 keyLen, len;
|
---|
| 1095 | (void)rng;
|
---|
| 1096 |
|
---|
| 1097 | keyLen = wc_RsaEncryptSize(key);
|
---|
| 1098 | if (keyLen > *outLen) {
|
---|
| 1099 | WOLFSSL_MSG("Output buffer is not big enough");
|
---|
| 1100 | return BAD_FUNC_ARG;
|
---|
| 1101 | }
|
---|
| 1102 |
|
---|
| 1103 | if (inLen != keyLen) {
|
---|
| 1104 | WOLFSSL_MSG("Expected that inLen equals RSA key length");
|
---|
| 1105 | return BAD_FUNC_ARG;
|
---|
| 1106 | }
|
---|
| 1107 |
|
---|
| 1108 | switch(type) {
|
---|
| 1109 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1110 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1111 | /* Currently public exponent is loaded by default.
|
---|
| 1112 | * In SDK 2017.1 RSA exponent values are expected to be of 4 bytes
|
---|
| 1113 | * leading to private key operations with Xsecure_RsaDecrypt not being
|
---|
| 1114 | * supported */
|
---|
| 1115 | ret = RSA_WRONG_TYPE_E;
|
---|
| 1116 | break;
|
---|
| 1117 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1118 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1119 | if (XSecure_RsaDecrypt(&(key->xRsa), in, out) != XST_SUCCESS) {
|
---|
| 1120 | ret = BAD_STATE_E;
|
---|
| 1121 | }
|
---|
| 1122 | break;
|
---|
| 1123 | default:
|
---|
| 1124 | ret = RSA_WRONG_TYPE_E;
|
---|
| 1125 | }
|
---|
| 1126 |
|
---|
| 1127 | *outLen = keyLen;
|
---|
| 1128 |
|
---|
| 1129 | return ret;
|
---|
| 1130 | }
|
---|
| 1131 | #endif /* WOLFSSL_XILINX_CRYPT */
|
---|
| 1132 |
|
---|
| 1133 | static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
|
---|
| 1134 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 1135 | {
|
---|
| 1136 | mp_int tmp;
|
---|
| 1137 | #ifdef WC_RSA_BLINDING
|
---|
| 1138 | mp_int rnd, rndi;
|
---|
| 1139 | #endif
|
---|
| 1140 | int ret = 0;
|
---|
| 1141 | word32 keyLen, len;
|
---|
| 1142 |
|
---|
| 1143 | #ifdef WOLFSSL_HAVE_SP_RSA
|
---|
| 1144 | #ifndef WOLFSSL_SP_NO_2048
|
---|
| 1145 | if (mp_count_bits(&key->n) == 2048) {
|
---|
| 1146 | switch(type) {
|
---|
| 1147 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1148 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1149 | #ifdef WC_RSA_BLINDING
|
---|
| 1150 | if (rng == NULL)
|
---|
| 1151 | return MISSING_RNG_E;
|
---|
| 1152 | #endif
|
---|
| 1153 | return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 1154 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
| 1155 | out, outLen);
|
---|
| 1156 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1157 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1158 | return sp_RsaPublic_2048(in, inLen, &key->e, &key->n, out, outLen);
|
---|
| 1159 | }
|
---|
| 1160 | }
|
---|
| 1161 | #endif
|
---|
| 1162 | #ifndef WOLFSSL_SP_NO_3072
|
---|
| 1163 | if (mp_count_bits(&key->n) == 3072) {
|
---|
| 1164 | switch(type) {
|
---|
| 1165 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1166 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1167 | #ifdef WC_RSA_BLINDING
|
---|
| 1168 | if (rng == NULL)
|
---|
| 1169 | return MISSING_RNG_E;
|
---|
| 1170 | #endif
|
---|
| 1171 | return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
|
---|
| 1172 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
| 1173 | out, outLen);
|
---|
| 1174 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1175 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1176 | return sp_RsaPublic_3072(in, inLen, &key->e, &key->n, out, outLen);
|
---|
| 1177 | }
|
---|
| 1178 | }
|
---|
| 1179 | #endif
|
---|
| 1180 | #endif /* WOLFSSL_HAVE_SP_RSA */
|
---|
| 1181 |
|
---|
| 1182 | (void)rng;
|
---|
| 1183 |
|
---|
| 1184 | if (mp_init(&tmp) != MP_OKAY)
|
---|
| 1185 | return MP_INIT_E;
|
---|
| 1186 |
|
---|
| 1187 | #ifdef WC_RSA_BLINDING
|
---|
| 1188 | if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) {
|
---|
| 1189 | if (mp_init_multi(&rnd, &rndi, NULL, NULL, NULL, NULL) != MP_OKAY) {
|
---|
| 1190 | mp_clear(&tmp);
|
---|
| 1191 | return MP_INIT_E;
|
---|
| 1192 | }
|
---|
| 1193 | }
|
---|
| 1194 | #endif
|
---|
| 1195 |
|
---|
| 1196 | if (mp_read_unsigned_bin(&tmp, (byte*)in, inLen) != MP_OKAY)
|
---|
| 1197 | ERROR_OUT(MP_READ_E);
|
---|
| 1198 |
|
---|
| 1199 | switch(type) {
|
---|
| 1200 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1201 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1202 | {
|
---|
| 1203 | #ifdef WC_RSA_BLINDING
|
---|
| 1204 | /* blind */
|
---|
| 1205 | ret = mp_rand(&rnd, get_digit_count(&key->n), rng);
|
---|
| 1206 | if (ret != MP_OKAY)
|
---|
| 1207 | goto done;
|
---|
| 1208 |
|
---|
| 1209 | /* rndi = 1/rnd mod n */
|
---|
| 1210 | if (mp_invmod(&rnd, &key->n, &rndi) != MP_OKAY)
|
---|
| 1211 | ERROR_OUT(MP_INVMOD_E);
|
---|
| 1212 |
|
---|
| 1213 | /* rnd = rnd^e */
|
---|
| 1214 | if (mp_exptmod(&rnd, &key->e, &key->n, &rnd) != MP_OKAY)
|
---|
| 1215 | ERROR_OUT(MP_EXPTMOD_E);
|
---|
| 1216 |
|
---|
| 1217 | /* tmp = tmp*rnd mod n */
|
---|
| 1218 | if (mp_mulmod(&tmp, &rnd, &key->n, &tmp) != MP_OKAY)
|
---|
| 1219 | ERROR_OUT(MP_MULMOD_E);
|
---|
| 1220 | #endif /* WC_RSA_BLINGING */
|
---|
| 1221 |
|
---|
| 1222 | #ifdef RSA_LOW_MEM /* half as much memory but twice as slow */
|
---|
| 1223 | if (mp_exptmod(&tmp, &key->d, &key->n, &tmp) != MP_OKAY)
|
---|
| 1224 | ERROR_OUT(MP_EXPTMOD_E);
|
---|
| 1225 | #else
|
---|
| 1226 | /* Return 0 when cond is false and n when cond is true. */
|
---|
| 1227 | #define COND_N(cond, n) ((0 - (cond)) & (n))
|
---|
| 1228 | /* If ret has an error value return it otherwise if r is OK then return
|
---|
| 1229 | * 0 otherwise return e.
|
---|
| 1230 | */
|
---|
| 1231 | #define RET_ERR(ret, r, e) \
|
---|
| 1232 | ((ret) | (COND_N((ret) == 0, COND_N((r) != MP_OKAY, (e)))))
|
---|
| 1233 |
|
---|
| 1234 | { /* tmpa/b scope */
|
---|
| 1235 | mp_int tmpa, tmpb;
|
---|
| 1236 | int r;
|
---|
| 1237 |
|
---|
| 1238 | if (mp_init(&tmpa) != MP_OKAY)
|
---|
| 1239 | ERROR_OUT(MP_INIT_E);
|
---|
| 1240 |
|
---|
| 1241 | if (mp_init(&tmpb) != MP_OKAY) {
|
---|
| 1242 | mp_clear(&tmpa);
|
---|
| 1243 | ERROR_OUT(MP_INIT_E);
|
---|
| 1244 | }
|
---|
| 1245 |
|
---|
| 1246 | /* tmpa = tmp^dP mod p */
|
---|
| 1247 | r = mp_exptmod(&tmp, &key->dP, &key->p, &tmpa);
|
---|
| 1248 | ret = RET_ERR(ret, r, MP_EXPTMOD_E);
|
---|
| 1249 |
|
---|
| 1250 | /* tmpb = tmp^dQ mod q */
|
---|
| 1251 | r = mp_exptmod(&tmp, &key->dQ, &key->q, &tmpb);
|
---|
| 1252 | ret = RET_ERR(ret, r, MP_EXPTMOD_E);
|
---|
| 1253 |
|
---|
| 1254 | /* tmp = (tmpa - tmpb) * qInv (mod p) */
|
---|
| 1255 | r = mp_sub(&tmpa, &tmpb, &tmp);
|
---|
| 1256 | ret = RET_ERR(ret, r, MP_SUB_E);
|
---|
| 1257 |
|
---|
| 1258 | r = mp_mulmod(&tmp, &key->u, &key->p, &tmp);
|
---|
| 1259 | ret = RET_ERR(ret, r, MP_MULMOD_E);
|
---|
| 1260 |
|
---|
| 1261 | /* tmp = tmpb + q * tmp */
|
---|
| 1262 | r = mp_mul(&tmp, &key->q, &tmp);
|
---|
| 1263 | ret = RET_ERR(ret, r, MP_MUL_E);
|
---|
| 1264 |
|
---|
| 1265 | r = mp_add(&tmp, &tmpb, &tmp);
|
---|
| 1266 | ret = RET_ERR(ret, r, MP_ADD_E);
|
---|
| 1267 |
|
---|
| 1268 | mp_clear(&tmpa);
|
---|
| 1269 | mp_clear(&tmpb);
|
---|
| 1270 |
|
---|
| 1271 | if (ret != 0) {
|
---|
| 1272 | goto done;
|
---|
| 1273 | }
|
---|
| 1274 | #undef RET_ERR
|
---|
| 1275 | #undef COND_N
|
---|
| 1276 | } /* tmpa/b scope */
|
---|
| 1277 | #endif /* RSA_LOW_MEM */
|
---|
| 1278 |
|
---|
| 1279 | #ifdef WC_RSA_BLINDING
|
---|
| 1280 | /* unblind */
|
---|
| 1281 | if (mp_mulmod(&tmp, &rndi, &key->n, &tmp) != MP_OKAY)
|
---|
| 1282 | ERROR_OUT(MP_MULMOD_E);
|
---|
| 1283 | #endif /* WC_RSA_BLINDING */
|
---|
| 1284 |
|
---|
| 1285 | break;
|
---|
| 1286 | }
|
---|
| 1287 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1288 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1289 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
| 1290 | ret = wc_RsaFunctionXil(in, inLen, out, outLen, type, key, rng);
|
---|
| 1291 | goto done;
|
---|
| 1292 | #else
|
---|
| 1293 | if (mp_exptmod(&tmp, &key->e, &key->n, &tmp) != MP_OKAY)
|
---|
| 1294 | ERROR_OUT(MP_EXPTMOD_E);
|
---|
| 1295 | break;
|
---|
| 1296 | #endif
|
---|
| 1297 | default:
|
---|
| 1298 | ERROR_OUT(RSA_WRONG_TYPE_E);
|
---|
| 1299 | }
|
---|
| 1300 |
|
---|
| 1301 | keyLen = wc_RsaEncryptSize(key);
|
---|
| 1302 | if (keyLen > *outLen) {
|
---|
| 1303 | ERROR_OUT(RSA_BUFFER_E);
|
---|
| 1304 | }
|
---|
| 1305 |
|
---|
| 1306 | len = mp_unsigned_bin_size(&tmp);
|
---|
| 1307 |
|
---|
| 1308 | /* pad front w/ zeros to match key length */
|
---|
| 1309 | while (len < keyLen) {
|
---|
| 1310 | *out++ = 0x00;
|
---|
| 1311 | len++;
|
---|
| 1312 | }
|
---|
| 1313 |
|
---|
| 1314 | *outLen = keyLen;
|
---|
| 1315 |
|
---|
| 1316 | /* convert */
|
---|
| 1317 | if (mp_to_unsigned_bin(&tmp, out) != MP_OKAY)
|
---|
| 1318 | ERROR_OUT(MP_TO_E);
|
---|
| 1319 |
|
---|
| 1320 | done:
|
---|
| 1321 | mp_clear(&tmp);
|
---|
| 1322 | #ifdef WC_RSA_BLINDING
|
---|
| 1323 | if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) {
|
---|
| 1324 | mp_clear(&rndi);
|
---|
| 1325 | mp_clear(&rnd);
|
---|
| 1326 | }
|
---|
| 1327 | #endif
|
---|
| 1328 | return ret;
|
---|
| 1329 | }
|
---|
| 1330 |
|
---|
| 1331 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
| 1332 | static int wc_RsaFunctionAsync(const byte* in, word32 inLen, byte* out,
|
---|
| 1333 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 1334 | {
|
---|
| 1335 | int ret = 0;
|
---|
| 1336 |
|
---|
| 1337 | (void)rng;
|
---|
| 1338 |
|
---|
| 1339 | #ifdef WOLFSSL_ASYNC_CRYPT_TEST
|
---|
| 1340 | if (wc_AsyncTestInit(&key->asyncDev, ASYNC_TEST_RSA_FUNC)) {
|
---|
| 1341 | WC_ASYNC_TEST* testDev = &key->asyncDev.test;
|
---|
| 1342 | testDev->rsaFunc.in = in;
|
---|
| 1343 | testDev->rsaFunc.inSz = inLen;
|
---|
| 1344 | testDev->rsaFunc.out = out;
|
---|
| 1345 | testDev->rsaFunc.outSz = outLen;
|
---|
| 1346 | testDev->rsaFunc.type = type;
|
---|
| 1347 | testDev->rsaFunc.key = key;
|
---|
| 1348 | testDev->rsaFunc.rng = rng;
|
---|
| 1349 | return WC_PENDING_E;
|
---|
| 1350 | }
|
---|
| 1351 | #endif /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
| 1352 |
|
---|
| 1353 | switch(type) {
|
---|
| 1354 | case RSA_PRIVATE_DECRYPT:
|
---|
| 1355 | case RSA_PRIVATE_ENCRYPT:
|
---|
| 1356 | #ifdef HAVE_CAVIUM
|
---|
| 1357 | ret = NitroxRsaExptMod(in, inLen,
|
---|
| 1358 | key->d.raw.buf, key->d.raw.len,
|
---|
| 1359 | key->n.raw.buf, key->n.raw.len,
|
---|
| 1360 | out, outLen, key);
|
---|
| 1361 | #elif defined(HAVE_INTEL_QA)
|
---|
| 1362 | #ifdef RSA_LOW_MEM
|
---|
| 1363 | ret = IntelQaRsaPrivate(&key->asyncDev, in, inLen,
|
---|
| 1364 | &key->d.raw, &key->n.raw,
|
---|
| 1365 | out, outLen);
|
---|
| 1366 | #else
|
---|
| 1367 | ret = IntelQaRsaCrtPrivate(&key->asyncDev, in, inLen,
|
---|
| 1368 | &key->p.raw, &key->q.raw,
|
---|
| 1369 | &key->dP.raw, &key->dQ.raw,
|
---|
| 1370 | &key->u.raw,
|
---|
| 1371 | out, outLen);
|
---|
| 1372 | #endif
|
---|
| 1373 | #else /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
| 1374 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
| 1375 | #endif
|
---|
| 1376 | break;
|
---|
| 1377 |
|
---|
| 1378 | case RSA_PUBLIC_ENCRYPT:
|
---|
| 1379 | case RSA_PUBLIC_DECRYPT:
|
---|
| 1380 | #ifdef HAVE_CAVIUM
|
---|
| 1381 | ret = NitroxRsaExptMod(in, inLen,
|
---|
| 1382 | key->e.raw.buf, key->e.raw.len,
|
---|
| 1383 | key->n.raw.buf, key->n.raw.len,
|
---|
| 1384 | out, outLen, key);
|
---|
| 1385 | #elif defined(HAVE_INTEL_QA)
|
---|
| 1386 | ret = IntelQaRsaPublic(&key->asyncDev, in, inLen,
|
---|
| 1387 | &key->e.raw, &key->n.raw,
|
---|
| 1388 | out, outLen);
|
---|
| 1389 | #else /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
| 1390 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
| 1391 | #endif
|
---|
| 1392 | break;
|
---|
| 1393 |
|
---|
| 1394 | default:
|
---|
| 1395 | ret = RSA_WRONG_TYPE_E;
|
---|
| 1396 | }
|
---|
| 1397 |
|
---|
| 1398 | return ret;
|
---|
| 1399 | }
|
---|
| 1400 | #endif /* WOLFSSL_ASYNC_CRYPT && WC_ASYNC_ENABLE_RSA */
|
---|
| 1401 |
|
---|
| 1402 | int wc_RsaFunction(const byte* in, word32 inLen, byte* out,
|
---|
| 1403 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
| 1404 | {
|
---|
| 1405 | int ret;
|
---|
| 1406 |
|
---|
| 1407 | if (key == NULL || in == NULL || inLen == 0 || out == NULL ||
|
---|
| 1408 | outLen == NULL || *outLen == 0 || type == RSA_TYPE_UNKNOWN) {
|
---|
| 1409 | return BAD_FUNC_ARG;
|
---|
| 1410 | }
|
---|
| 1411 |
|
---|
| 1412 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
| 1413 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
| 1414 | key->n.raw.len > 0) {
|
---|
| 1415 | ret = wc_RsaFunctionAsync(in, inLen, out, outLen, type, key, rng);
|
---|
| 1416 | }
|
---|
| 1417 | else
|
---|
| 1418 | #endif
|
---|
| 1419 | {
|
---|
| 1420 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
| 1421 | }
|
---|
| 1422 |
|
---|
| 1423 | /* handle error */
|
---|
| 1424 | if (ret < 0 && ret != WC_PENDING_E) {
|
---|
| 1425 | if (ret == MP_EXPTMOD_E) {
|
---|
| 1426 | /* This can happen due to incorrectly set FP_MAX_BITS or missing XREALLOC */
|
---|
| 1427 | WOLFSSL_MSG("RSA_FUNCTION MP_EXPTMOD_E: memory/config problem");
|
---|
| 1428 | }
|
---|
| 1429 |
|
---|
| 1430 | key->state = RSA_STATE_NONE;
|
---|
| 1431 | wc_RsaCleanup(key);
|
---|
| 1432 | }
|
---|
| 1433 |
|
---|
| 1434 | return ret;
|
---|
| 1435 | }
|
---|
| 1436 |
|
---|
| 1437 |
|
---|
| 1438 | /* Internal Wrappers */
|
---|
| 1439 | /* Gives the option of choosing padding type
|
---|
| 1440 | in : input to be encrypted
|
---|
| 1441 | inLen: length of input buffer
|
---|
| 1442 | out: encrypted output
|
---|
| 1443 | outLen: length of encrypted output buffer
|
---|
| 1444 | key : wolfSSL initialized RSA key struct
|
---|
| 1445 | rng : wolfSSL initialized random number struct
|
---|
| 1446 | rsa_type : type of RSA: RSA_PUBLIC_ENCRYPT, RSA_PUBLIC_DECRYPT,
|
---|
| 1447 | RSA_PRIVATE_ENCRYPT or RSA_PRIVATE_DECRYPT
|
---|
| 1448 | pad_value: RSA_BLOCK_TYPE_1 or RSA_BLOCK_TYPE_2
|
---|
| 1449 | pad_type : type of padding: WC_RSA_PKCSV15_PAD, WC_RSA_OAEP_PAD or
|
---|
| 1450 | WC_RSA_PSS_PAD
|
---|
| 1451 | hash : type of hash algorithm to use found in wolfssl/wolfcrypt/hash.h
|
---|
| 1452 | mgf : type of mask generation function to use
|
---|
| 1453 | label : optional label
|
---|
| 1454 | labelSz : size of optional label buffer */
|
---|
| 1455 | static int RsaPublicEncryptEx(const byte* in, word32 inLen, byte* out,
|
---|
| 1456 | word32 outLen, RsaKey* key, int rsa_type,
|
---|
| 1457 | byte pad_value, int pad_type,
|
---|
| 1458 | enum wc_HashType hash, int mgf,
|
---|
| 1459 | byte* label, word32 labelSz, WC_RNG* rng)
|
---|
| 1460 | {
|
---|
| 1461 | int ret, sz;
|
---|
| 1462 |
|
---|
| 1463 | if (in == NULL || inLen == 0 || out == NULL || key == NULL) {
|
---|
| 1464 | return BAD_FUNC_ARG;
|
---|
| 1465 | }
|
---|
| 1466 |
|
---|
| 1467 | sz = wc_RsaEncryptSize(key);
|
---|
| 1468 | if (sz > (int)outLen) {
|
---|
| 1469 | return RSA_BUFFER_E;
|
---|
| 1470 | }
|
---|
| 1471 |
|
---|
| 1472 | if (sz < RSA_MIN_PAD_SZ) {
|
---|
| 1473 | return WC_KEY_SIZE_E;
|
---|
| 1474 | }
|
---|
| 1475 |
|
---|
| 1476 | if (inLen > (word32)(sz - RSA_MIN_PAD_SZ)) {
|
---|
| 1477 | return RSA_BUFFER_E;
|
---|
| 1478 | }
|
---|
| 1479 |
|
---|
| 1480 | switch (key->state) {
|
---|
| 1481 | case RSA_STATE_NONE:
|
---|
| 1482 | case RSA_STATE_ENCRYPT_PAD:
|
---|
| 1483 | key->state = RSA_STATE_ENCRYPT_PAD;
|
---|
| 1484 |
|
---|
| 1485 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 1486 | defined(HAVE_CAVIUM)
|
---|
| 1487 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA && key->n.raw.buf) {
|
---|
| 1488 | /* Async operations that include padding */
|
---|
| 1489 | if (rsa_type == RSA_PUBLIC_ENCRYPT &&
|
---|
| 1490 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
| 1491 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
| 1492 | key->dataLen = key->n.raw.len;
|
---|
| 1493 | return NitroxRsaPublicEncrypt(in, inLen, out, outLen, key);
|
---|
| 1494 | }
|
---|
| 1495 | else if (rsa_type == RSA_PRIVATE_ENCRYPT &&
|
---|
| 1496 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
| 1497 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
| 1498 | key->dataLen = key->n.raw.len;
|
---|
| 1499 | return NitroxRsaSSL_Sign(in, inLen, out, outLen, key);
|
---|
| 1500 | }
|
---|
| 1501 | }
|
---|
| 1502 | #endif
|
---|
| 1503 |
|
---|
| 1504 | ret = wc_RsaPad_ex(in, inLen, out, sz, pad_value, rng, pad_type, hash,
|
---|
| 1505 | mgf, label, labelSz, mp_count_bits(&key->n),
|
---|
| 1506 | key->heap);
|
---|
| 1507 | if (ret < 0) {
|
---|
| 1508 | break;
|
---|
| 1509 | }
|
---|
| 1510 |
|
---|
| 1511 | key->state = RSA_STATE_ENCRYPT_EXPTMOD;
|
---|
| 1512 |
|
---|
| 1513 | FALL_THROUGH;
|
---|
| 1514 |
|
---|
| 1515 | case RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
| 1516 |
|
---|
| 1517 | key->dataLen = outLen;
|
---|
| 1518 | ret = wc_RsaFunction(out, sz, out, &key->dataLen, rsa_type, key, rng);
|
---|
| 1519 |
|
---|
| 1520 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
| 1521 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
| 1522 | }
|
---|
| 1523 | if (ret < 0) {
|
---|
| 1524 | break;
|
---|
| 1525 | }
|
---|
| 1526 |
|
---|
| 1527 | FALL_THROUGH;
|
---|
| 1528 |
|
---|
| 1529 | case RSA_STATE_ENCRYPT_RES:
|
---|
| 1530 | ret = key->dataLen;
|
---|
| 1531 | break;
|
---|
| 1532 |
|
---|
| 1533 | default:
|
---|
| 1534 | ret = BAD_STATE_E;
|
---|
| 1535 | break;
|
---|
| 1536 | }
|
---|
| 1537 |
|
---|
| 1538 | /* if async pending then return and skip done cleanup below */
|
---|
| 1539 | if (ret == WC_PENDING_E) {
|
---|
| 1540 | return ret;
|
---|
| 1541 | }
|
---|
| 1542 |
|
---|
| 1543 | key->state = RSA_STATE_NONE;
|
---|
| 1544 | wc_RsaCleanup(key);
|
---|
| 1545 |
|
---|
| 1546 | return ret;
|
---|
| 1547 | }
|
---|
| 1548 |
|
---|
| 1549 | /* Gives the option of choosing padding type
|
---|
| 1550 | in : input to be decrypted
|
---|
| 1551 | inLen: length of input buffer
|
---|
| 1552 | out: decrypted message
|
---|
| 1553 | outLen: length of decrypted message in bytes
|
---|
| 1554 | outPtr: optional inline output pointer (if provided doing inline)
|
---|
| 1555 | key : wolfSSL initialized RSA key struct
|
---|
| 1556 | rsa_type : type of RSA: RSA_PUBLIC_ENCRYPT, RSA_PUBLIC_DECRYPT,
|
---|
| 1557 | RSA_PRIVATE_ENCRYPT or RSA_PRIVATE_DECRYPT
|
---|
| 1558 | pad_value: RSA_BLOCK_TYPE_1 or RSA_BLOCK_TYPE_2
|
---|
| 1559 | pad_type : type of padding: WC_RSA_PKCSV15_PAD, WC_RSA_OAEP_PAD
|
---|
| 1560 | WC_RSA_PSS_PAD
|
---|
| 1561 | hash : type of hash algorithm to use found in wolfssl/wolfcrypt/hash.h
|
---|
| 1562 | mgf : type of mask generation function to use
|
---|
| 1563 | label : optional label
|
---|
| 1564 | labelSz : size of optional label buffer */
|
---|
| 1565 | static int RsaPrivateDecryptEx(byte* in, word32 inLen, byte* out,
|
---|
| 1566 | word32 outLen, byte** outPtr, RsaKey* key,
|
---|
| 1567 | int rsa_type, byte pad_value, int pad_type,
|
---|
| 1568 | enum wc_HashType hash, int mgf,
|
---|
| 1569 | byte* label, word32 labelSz, WC_RNG* rng)
|
---|
| 1570 | {
|
---|
| 1571 | int ret = RSA_WRONG_TYPE_E;
|
---|
| 1572 |
|
---|
| 1573 | if (in == NULL || inLen == 0 || out == NULL || key == NULL) {
|
---|
| 1574 | return BAD_FUNC_ARG;
|
---|
| 1575 | }
|
---|
| 1576 |
|
---|
| 1577 | switch (key->state) {
|
---|
| 1578 | case RSA_STATE_NONE:
|
---|
| 1579 | case RSA_STATE_DECRYPT_EXPTMOD:
|
---|
| 1580 | key->state = RSA_STATE_DECRYPT_EXPTMOD;
|
---|
| 1581 | key->dataLen = inLen;
|
---|
| 1582 |
|
---|
| 1583 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 1584 | defined(HAVE_CAVIUM)
|
---|
| 1585 | /* Async operations that include padding */
|
---|
| 1586 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA) {
|
---|
| 1587 | if (rsa_type == RSA_PRIVATE_DECRYPT &&
|
---|
| 1588 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
| 1589 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
| 1590 | key->data = NULL;
|
---|
| 1591 | if (outPtr)
|
---|
| 1592 | *outPtr = in;
|
---|
| 1593 | return NitroxRsaPrivateDecrypt(in, inLen, out, &key->dataLen, key);
|
---|
| 1594 | }
|
---|
| 1595 | else if (rsa_type == RSA_PUBLIC_DECRYPT &&
|
---|
| 1596 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
| 1597 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
| 1598 | key->data = NULL;
|
---|
| 1599 | return NitroxRsaSSL_Verify(in, inLen, out, &key->dataLen, key);
|
---|
| 1600 | }
|
---|
| 1601 | }
|
---|
| 1602 | #endif
|
---|
| 1603 |
|
---|
| 1604 | /* verify the tmp ptr is NULL, otherwise indicates bad state */
|
---|
| 1605 | if (key->data != NULL) {
|
---|
| 1606 | ret = BAD_STATE_E;
|
---|
| 1607 | break;
|
---|
| 1608 | }
|
---|
| 1609 |
|
---|
| 1610 | /* if not doing this inline then allocate a buffer for it */
|
---|
| 1611 | if (outPtr == NULL) {
|
---|
| 1612 | key->data = (byte*)XMALLOC(inLen, key->heap, DYNAMIC_TYPE_WOLF_BIGINT);
|
---|
| 1613 | key->dataIsAlloc = 1;
|
---|
| 1614 | if (key->data == NULL) {
|
---|
| 1615 | ret = MEMORY_E;
|
---|
| 1616 | break;
|
---|
| 1617 | }
|
---|
| 1618 | XMEMCPY(key->data, in, inLen);
|
---|
| 1619 | }
|
---|
| 1620 | else {
|
---|
| 1621 | key->data = out;
|
---|
| 1622 | }
|
---|
| 1623 | ret = wc_RsaFunction(key->data, inLen, key->data, &key->dataLen, rsa_type,
|
---|
| 1624 | key, rng);
|
---|
| 1625 |
|
---|
| 1626 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
| 1627 | key->state = RSA_STATE_DECRYPT_UNPAD;
|
---|
| 1628 | }
|
---|
| 1629 | if (ret < 0) {
|
---|
| 1630 | break;
|
---|
| 1631 | }
|
---|
| 1632 |
|
---|
| 1633 | FALL_THROUGH;
|
---|
| 1634 |
|
---|
| 1635 | case RSA_STATE_DECRYPT_UNPAD:
|
---|
| 1636 | {
|
---|
| 1637 | byte* pad = NULL;
|
---|
| 1638 | ret = wc_RsaUnPad_ex(key->data, key->dataLen, &pad, pad_value, pad_type,
|
---|
| 1639 | hash, mgf, label, labelSz, mp_count_bits(&key->n),
|
---|
| 1640 | key->heap);
|
---|
| 1641 | if (ret > 0 && ret <= (int)outLen && pad != NULL) {
|
---|
| 1642 | /* only copy output if not inline */
|
---|
| 1643 | if (outPtr == NULL) {
|
---|
| 1644 | XMEMCPY(out, pad, ret);
|
---|
| 1645 | }
|
---|
| 1646 | else {
|
---|
| 1647 | *outPtr = pad;
|
---|
| 1648 | }
|
---|
| 1649 | }
|
---|
| 1650 | else if (ret >= 0) {
|
---|
| 1651 | ret = RSA_BUFFER_E;
|
---|
| 1652 | }
|
---|
| 1653 | if (ret < 0) {
|
---|
| 1654 | break;
|
---|
| 1655 | }
|
---|
| 1656 |
|
---|
| 1657 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
| 1658 |
|
---|
| 1659 | FALL_THROUGH;
|
---|
| 1660 | }
|
---|
| 1661 | case RSA_STATE_DECRYPT_RES:
|
---|
| 1662 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
| 1663 | defined(HAVE_CAVIUM)
|
---|
| 1664 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA) {
|
---|
| 1665 | /* return event ret */
|
---|
| 1666 | ret = key->asyncDev.event.ret;
|
---|
| 1667 | if (ret == 0) {
|
---|
| 1668 | /* convert result */
|
---|
| 1669 | byte* dataLen = (byte*)&key->dataLen;
|
---|
| 1670 | ret = (dataLen[0] << 8) | (dataLen[1]);
|
---|
| 1671 | }
|
---|
| 1672 | }
|
---|
| 1673 | #endif
|
---|
| 1674 | break;
|
---|
| 1675 |
|
---|
| 1676 | default:
|
---|
| 1677 | ret = BAD_STATE_E;
|
---|
| 1678 | break;
|
---|
| 1679 | }
|
---|
| 1680 |
|
---|
| 1681 | /* if async pending then return and skip done cleanup below */
|
---|
| 1682 | if (ret == WC_PENDING_E) {
|
---|
| 1683 | return ret;
|
---|
| 1684 | }
|
---|
| 1685 |
|
---|
| 1686 | key->state = RSA_STATE_NONE;
|
---|
| 1687 | wc_RsaCleanup(key);
|
---|
| 1688 |
|
---|
| 1689 | return ret;
|
---|
| 1690 | }
|
---|
| 1691 |
|
---|
| 1692 |
|
---|
| 1693 | /* Public RSA Functions */
|
---|
| 1694 | int wc_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 1695 | RsaKey* key, WC_RNG* rng)
|
---|
| 1696 | {
|
---|
| 1697 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
| 1698 | RSA_PUBLIC_ENCRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
| 1699 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, rng);
|
---|
| 1700 | }
|
---|
| 1701 |
|
---|
| 1702 |
|
---|
| 1703 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1704 | int wc_RsaPublicEncrypt_ex(const byte* in, word32 inLen, byte* out,
|
---|
| 1705 | word32 outLen, RsaKey* key, WC_RNG* rng, int type,
|
---|
| 1706 | enum wc_HashType hash, int mgf, byte* label,
|
---|
| 1707 | word32 labelSz)
|
---|
| 1708 | {
|
---|
| 1709 | return RsaPublicEncryptEx(in, inLen, out, outLen, key, RSA_PUBLIC_ENCRYPT,
|
---|
| 1710 | RSA_BLOCK_TYPE_2, type, hash, mgf, label, labelSz, rng);
|
---|
| 1711 | }
|
---|
| 1712 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 1713 |
|
---|
| 1714 |
|
---|
| 1715 | int wc_RsaPrivateDecryptInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
| 1716 | {
|
---|
| 1717 | WC_RNG* rng = NULL;
|
---|
| 1718 | #ifdef WC_RSA_BLINDING
|
---|
| 1719 | rng = key->rng;
|
---|
| 1720 | #endif
|
---|
| 1721 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 1722 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
| 1723 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, rng);
|
---|
| 1724 | }
|
---|
| 1725 |
|
---|
| 1726 |
|
---|
| 1727 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1728 | int wc_RsaPrivateDecryptInline_ex(byte* in, word32 inLen, byte** out,
|
---|
| 1729 | RsaKey* key, int type, enum wc_HashType hash,
|
---|
| 1730 | int mgf, byte* label, word32 labelSz)
|
---|
| 1731 | {
|
---|
| 1732 | WC_RNG* rng = NULL;
|
---|
| 1733 | #ifdef WC_RSA_BLINDING
|
---|
| 1734 | rng = key->rng;
|
---|
| 1735 | #endif
|
---|
| 1736 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 1737 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, type, hash,
|
---|
| 1738 | mgf, label, labelSz, rng);
|
---|
| 1739 | }
|
---|
| 1740 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 1741 |
|
---|
| 1742 |
|
---|
| 1743 | int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out,
|
---|
| 1744 | word32 outLen, RsaKey* key)
|
---|
| 1745 | {
|
---|
| 1746 | WC_RNG* rng = NULL;
|
---|
| 1747 | #ifdef WC_RSA_BLINDING
|
---|
| 1748 | rng = key->rng;
|
---|
| 1749 | #endif
|
---|
| 1750 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
| 1751 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
| 1752 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, rng);
|
---|
| 1753 | }
|
---|
| 1754 |
|
---|
| 1755 | #ifndef WC_NO_RSA_OAEP
|
---|
| 1756 | int wc_RsaPrivateDecrypt_ex(const byte* in, word32 inLen, byte* out,
|
---|
| 1757 | word32 outLen, RsaKey* key, int type,
|
---|
| 1758 | enum wc_HashType hash, int mgf, byte* label,
|
---|
| 1759 | word32 labelSz)
|
---|
| 1760 | {
|
---|
| 1761 | WC_RNG* rng = NULL;
|
---|
| 1762 | #ifdef WC_RSA_BLINDING
|
---|
| 1763 | rng = key->rng;
|
---|
| 1764 | #endif
|
---|
| 1765 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
| 1766 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, type, hash, mgf, label,
|
---|
| 1767 | labelSz, rng);
|
---|
| 1768 | }
|
---|
| 1769 | #endif /* WC_NO_RSA_OAEP */
|
---|
| 1770 |
|
---|
| 1771 |
|
---|
| 1772 | int wc_RsaSSL_VerifyInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
| 1773 | {
|
---|
| 1774 | WC_RNG* rng = NULL;
|
---|
| 1775 | #ifdef WC_RSA_BLINDING
|
---|
| 1776 | rng = key->rng;
|
---|
| 1777 | #endif
|
---|
| 1778 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 1779 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
| 1780 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, rng);
|
---|
| 1781 | }
|
---|
| 1782 |
|
---|
| 1783 | int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 1784 | RsaKey* key)
|
---|
| 1785 | {
|
---|
| 1786 | WC_RNG* rng;
|
---|
| 1787 |
|
---|
| 1788 | if (key == NULL) {
|
---|
| 1789 | return BAD_FUNC_ARG;
|
---|
| 1790 | }
|
---|
| 1791 |
|
---|
| 1792 | rng = NULL;
|
---|
| 1793 | #ifdef WC_RSA_BLINDING
|
---|
| 1794 | rng = key->rng;
|
---|
| 1795 | #endif
|
---|
| 1796 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
| 1797 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
| 1798 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, rng);
|
---|
| 1799 | }
|
---|
| 1800 |
|
---|
| 1801 | #ifdef WC_RSA_PSS
|
---|
| 1802 | int wc_RsaPSS_VerifyInline(byte* in, word32 inLen, byte** out,
|
---|
| 1803 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
| 1804 | {
|
---|
| 1805 | WC_RNG* rng = NULL;
|
---|
| 1806 | #ifdef WC_RSA_BLINDING
|
---|
| 1807 | rng = key->rng;
|
---|
| 1808 | #endif
|
---|
| 1809 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
| 1810 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
| 1811 | hash, mgf, NULL, 0, rng);
|
---|
| 1812 | }
|
---|
| 1813 |
|
---|
| 1814 | /* Sig = 8 * 0x00 | Space for Message Hash | Salt | Exp Hash
|
---|
| 1815 | * Exp Hash = HASH(8 * 0x00 | Message Hash | Salt)
|
---|
| 1816 | */
|
---|
| 1817 | int wc_RsaPSS_CheckPadding(const byte* in, word32 inSz, byte* sig,
|
---|
| 1818 | word32 sigSz, enum wc_HashType hashType)
|
---|
| 1819 | {
|
---|
| 1820 | int ret;
|
---|
| 1821 |
|
---|
| 1822 | if (in == NULL || sig == NULL ||
|
---|
| 1823 | inSz != (word32)wc_HashGetDigestSize(hashType) ||
|
---|
| 1824 | sigSz != RSA_PSS_PAD_SZ + inSz * 3)
|
---|
| 1825 | ret = BAD_FUNC_ARG;
|
---|
| 1826 | else {
|
---|
| 1827 | XMEMCPY(sig + RSA_PSS_PAD_SZ, in, inSz);
|
---|
| 1828 | ret = wc_Hash(hashType, sig, RSA_PSS_PAD_SZ + inSz * 2, sig, inSz);
|
---|
| 1829 | if (ret != 0)
|
---|
| 1830 | return ret;
|
---|
| 1831 | if (XMEMCMP(sig, sig + RSA_PSS_PAD_SZ + inSz * 2, inSz) != 0) {
|
---|
| 1832 | WOLFSSL_MSG("RsaPSS_CheckPadding: Padding Error");
|
---|
| 1833 | ret = BAD_PADDING_E;
|
---|
| 1834 | }
|
---|
| 1835 | else
|
---|
| 1836 | ret = 0;
|
---|
| 1837 | }
|
---|
| 1838 |
|
---|
| 1839 | return ret;
|
---|
| 1840 | }
|
---|
| 1841 | #endif
|
---|
| 1842 |
|
---|
| 1843 | int wc_RsaSSL_Sign(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 1844 | RsaKey* key, WC_RNG* rng)
|
---|
| 1845 | {
|
---|
| 1846 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
| 1847 | RSA_PRIVATE_ENCRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
| 1848 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, rng);
|
---|
| 1849 | }
|
---|
| 1850 |
|
---|
| 1851 | #ifdef WC_RSA_PSS
|
---|
| 1852 | int wc_RsaPSS_Sign(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
| 1853 | enum wc_HashType hash, int mgf, RsaKey* key, WC_RNG* rng)
|
---|
| 1854 | {
|
---|
| 1855 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
| 1856 | RSA_PRIVATE_ENCRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
| 1857 | hash, mgf, NULL, 0, rng);
|
---|
| 1858 | }
|
---|
| 1859 | #endif
|
---|
| 1860 |
|
---|
| 1861 | int wc_RsaEncryptSize(RsaKey* key)
|
---|
| 1862 | {
|
---|
| 1863 | if (key == NULL) {
|
---|
| 1864 | return BAD_FUNC_ARG;
|
---|
| 1865 | }
|
---|
| 1866 | return mp_unsigned_bin_size(&key->n);
|
---|
| 1867 | }
|
---|
| 1868 |
|
---|
| 1869 |
|
---|
| 1870 | /* flatten RsaKey structure into individual elements (e, n) */
|
---|
| 1871 | int wc_RsaFlattenPublicKey(RsaKey* key, byte* e, word32* eSz, byte* n,
|
---|
| 1872 | word32* nSz)
|
---|
| 1873 | {
|
---|
| 1874 | int sz, ret;
|
---|
| 1875 |
|
---|
| 1876 | if (key == NULL || e == NULL || eSz == NULL || n == NULL || nSz == NULL) {
|
---|
| 1877 | return BAD_FUNC_ARG;
|
---|
| 1878 | }
|
---|
| 1879 |
|
---|
| 1880 | sz = mp_unsigned_bin_size(&key->e);
|
---|
| 1881 | if ((word32)sz > *eSz)
|
---|
| 1882 | return RSA_BUFFER_E;
|
---|
| 1883 | ret = mp_to_unsigned_bin(&key->e, e);
|
---|
| 1884 | if (ret != MP_OKAY)
|
---|
| 1885 | return ret;
|
---|
| 1886 | *eSz = (word32)sz;
|
---|
| 1887 |
|
---|
| 1888 | sz = wc_RsaEncryptSize(key);
|
---|
| 1889 | if ((word32)sz > *nSz)
|
---|
| 1890 | return RSA_BUFFER_E;
|
---|
| 1891 | ret = mp_to_unsigned_bin(&key->n, n);
|
---|
| 1892 | if (ret != MP_OKAY)
|
---|
| 1893 | return ret;
|
---|
| 1894 | *nSz = (word32)sz;
|
---|
| 1895 |
|
---|
| 1896 | return 0;
|
---|
| 1897 | }
|
---|
| 1898 |
|
---|
| 1899 | #ifdef WOLFSSL_KEY_GEN
|
---|
| 1900 | /* Make an RSA key for size bits, with e specified, 65537 is a good e */
|
---|
| 1901 | int wc_MakeRsaKey(RsaKey* key, int size, long e, WC_RNG* rng)
|
---|
| 1902 | {
|
---|
| 1903 | mp_int p, q, tmp1, tmp2, tmp3;
|
---|
| 1904 | int err;
|
---|
| 1905 |
|
---|
| 1906 | if (key == NULL || rng == NULL)
|
---|
| 1907 | return BAD_FUNC_ARG;
|
---|
| 1908 |
|
---|
| 1909 | if (size < RSA_MIN_SIZE || size > RSA_MAX_SIZE)
|
---|
| 1910 | return BAD_FUNC_ARG;
|
---|
| 1911 |
|
---|
| 1912 | if (e < 3 || (e & 1) == 0)
|
---|
| 1913 | return BAD_FUNC_ARG;
|
---|
| 1914 |
|
---|
| 1915 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
| 1916 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA) {
|
---|
| 1917 | #ifdef HAVE_CAVIUM
|
---|
| 1918 | /* TODO: Not implemented */
|
---|
| 1919 | #elif defined(HAVE_INTEL_QA)
|
---|
| 1920 | /* TODO: Not implemented */
|
---|
| 1921 | #else
|
---|
| 1922 | if (wc_AsyncTestInit(&key->asyncDev, ASYNC_TEST_RSA_MAKE)) {
|
---|
| 1923 | WC_ASYNC_TEST* testDev = &key->asyncDev.test;
|
---|
| 1924 | testDev->rsaMake.rng = rng;
|
---|
| 1925 | testDev->rsaMake.key = key;
|
---|
| 1926 | testDev->rsaMake.size = size;
|
---|
| 1927 | testDev->rsaMake.e = e;
|
---|
| 1928 | return WC_PENDING_E;
|
---|
| 1929 | }
|
---|
| 1930 | #endif
|
---|
| 1931 | }
|
---|
| 1932 | #endif
|
---|
| 1933 |
|
---|
| 1934 | if ((err = mp_init_multi(&p, &q, &tmp1, &tmp2, &tmp3, NULL)) != MP_OKAY)
|
---|
| 1935 | return err;
|
---|
| 1936 |
|
---|
| 1937 | err = mp_set_int(&tmp3, e);
|
---|
| 1938 |
|
---|
| 1939 | /* make p */
|
---|
| 1940 | if (err == MP_OKAY) {
|
---|
| 1941 | do {
|
---|
| 1942 | err = mp_rand_prime(&p, size/16, rng, key->heap); /* size in bytes/2 */
|
---|
| 1943 |
|
---|
| 1944 | if (err == MP_OKAY)
|
---|
| 1945 | err = mp_sub_d(&p, 1, &tmp1); /* tmp1 = p-1 */
|
---|
| 1946 |
|
---|
| 1947 | if (err == MP_OKAY)
|
---|
| 1948 | err = mp_gcd(&tmp1, &tmp3, &tmp2); /* tmp2 = gcd(p-1, e) */
|
---|
| 1949 | } while (err == MP_OKAY && mp_cmp_d(&tmp2, 1) != 0); /* e divides p-1 */
|
---|
| 1950 | }
|
---|
| 1951 |
|
---|
| 1952 | /* make q */
|
---|
| 1953 | if (err == MP_OKAY) {
|
---|
| 1954 | do {
|
---|
| 1955 | err = mp_rand_prime(&q, size/16, rng, key->heap); /* size in bytes/2 */
|
---|
| 1956 |
|
---|
| 1957 | if (err == MP_OKAY)
|
---|
| 1958 | err = mp_sub_d(&q, 1, &tmp1); /* tmp1 = q-1 */
|
---|
| 1959 |
|
---|
| 1960 | if (err == MP_OKAY)
|
---|
| 1961 | err = mp_gcd(&tmp1, &tmp3, &tmp2); /* tmp2 = gcd(q-1, e) */
|
---|
| 1962 | } while (err == MP_OKAY && mp_cmp_d(&tmp2, 1) != 0); /* e divides q-1 */
|
---|
| 1963 | }
|
---|
| 1964 |
|
---|
| 1965 | if (err == MP_OKAY)
|
---|
| 1966 | err = mp_init_multi(&key->n, &key->e, &key->d, &key->p, &key->q, NULL);
|
---|
| 1967 |
|
---|
| 1968 | if (err == MP_OKAY)
|
---|
| 1969 | err = mp_init_multi(&key->dP, &key->dQ, &key->u, NULL, NULL, NULL);
|
---|
| 1970 |
|
---|
| 1971 | if (err == MP_OKAY)
|
---|
| 1972 | err = mp_sub_d(&p, 1, &tmp2); /* tmp2 = p-1 */
|
---|
| 1973 |
|
---|
| 1974 | if (err == MP_OKAY)
|
---|
| 1975 | err = mp_lcm(&tmp1, &tmp2, &tmp1); /* tmp1 = lcm(p-1, q-1),last loop */
|
---|
| 1976 |
|
---|
| 1977 | /* make key */
|
---|
| 1978 | if (err == MP_OKAY)
|
---|
| 1979 | err = mp_set_int(&key->e, (mp_digit)e); /* key->e = e */
|
---|
| 1980 |
|
---|
| 1981 | if (err == MP_OKAY) /* key->d = 1/e mod lcm(p-1, q-1) */
|
---|
| 1982 | err = mp_invmod(&key->e, &tmp1, &key->d);
|
---|
| 1983 |
|
---|
| 1984 | if (err == MP_OKAY)
|
---|
| 1985 | err = mp_mul(&p, &q, &key->n); /* key->n = pq */
|
---|
| 1986 |
|
---|
| 1987 | if (err == MP_OKAY)
|
---|
| 1988 | err = mp_sub_d(&p, 1, &tmp1);
|
---|
| 1989 |
|
---|
| 1990 | if (err == MP_OKAY)
|
---|
| 1991 | err = mp_sub_d(&q, 1, &tmp2);
|
---|
| 1992 |
|
---|
| 1993 | if (err == MP_OKAY)
|
---|
| 1994 | err = mp_mod(&key->d, &tmp1, &key->dP);
|
---|
| 1995 |
|
---|
| 1996 | if (err == MP_OKAY)
|
---|
| 1997 | err = mp_mod(&key->d, &tmp2, &key->dQ);
|
---|
| 1998 |
|
---|
| 1999 | if (err == MP_OKAY)
|
---|
| 2000 | err = mp_invmod(&q, &p, &key->u);
|
---|
| 2001 |
|
---|
| 2002 | if (err == MP_OKAY)
|
---|
| 2003 | err = mp_copy(&p, &key->p);
|
---|
| 2004 |
|
---|
| 2005 | if (err == MP_OKAY)
|
---|
| 2006 | err = mp_copy(&q, &key->q);
|
---|
| 2007 |
|
---|
| 2008 | if (err == MP_OKAY)
|
---|
| 2009 | key->type = RSA_PRIVATE;
|
---|
| 2010 |
|
---|
| 2011 | mp_clear(&tmp3);
|
---|
| 2012 | mp_clear(&tmp2);
|
---|
| 2013 | mp_clear(&tmp1);
|
---|
| 2014 | mp_clear(&q);
|
---|
| 2015 | mp_clear(&p);
|
---|
| 2016 |
|
---|
| 2017 | if (err != MP_OKAY) {
|
---|
| 2018 | wc_FreeRsaKey(key);
|
---|
| 2019 | return err;
|
---|
| 2020 | }
|
---|
| 2021 |
|
---|
| 2022 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
| 2023 | if (wc_InitRsaHw(key) != 0) {
|
---|
| 2024 | return BAD_STATE_E;
|
---|
| 2025 | }
|
---|
| 2026 | #endif
|
---|
| 2027 |
|
---|
| 2028 | return 0;
|
---|
| 2029 | }
|
---|
| 2030 | #endif /* WOLFSSL_KEY_GEN */
|
---|
| 2031 |
|
---|
| 2032 |
|
---|
| 2033 | #ifdef WC_RSA_BLINDING
|
---|
| 2034 |
|
---|
| 2035 | int wc_RsaSetRNG(RsaKey* key, WC_RNG* rng)
|
---|
| 2036 | {
|
---|
| 2037 | if (key == NULL)
|
---|
| 2038 | return BAD_FUNC_ARG;
|
---|
| 2039 |
|
---|
| 2040 | key->rng = rng;
|
---|
| 2041 |
|
---|
| 2042 | return 0;
|
---|
| 2043 | }
|
---|
| 2044 |
|
---|
| 2045 | #endif /* WC_RSA_BLINDING */
|
---|
| 2046 |
|
---|
| 2047 |
|
---|
| 2048 | #undef ERROR_OUT
|
---|
| 2049 |
|
---|
| 2050 | #endif /* HAVE_FIPS */
|
---|
| 2051 | #endif /* NO_RSA */
|
---|