wolf SSL / wolfSSL

wolfSSL SSL/TLS library, support up to TLS1.3

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wolfcrypt/src/signature.c@3:6f956bdb3073, 2016-04-28 (annotated)

Committer:
wolfSSL
Date:
Thu Apr 28 00:56:55 2016 +0000
Revision:
3:6f956bdb3073
wolfSSL 3.9.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 3:6f956bdb3073 1 /* signature.c
wolfSSL 3:6f956bdb3073 2 *
wolfSSL 3:6f956bdb3073 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 3:6f956bdb3073 4 *
wolfSSL 3:6f956bdb3073 5 * This file is part of wolfSSL.
wolfSSL 3:6f956bdb3073 6 *
wolfSSL 3:6f956bdb3073 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 3:6f956bdb3073 8 * it under the terms of the GNU General Public License as published by
wolfSSL 3:6f956bdb3073 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 3:6f956bdb3073 10 * (at your option) any later version.
wolfSSL 3:6f956bdb3073 11 *
wolfSSL 3:6f956bdb3073 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 3:6f956bdb3073 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 3:6f956bdb3073 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 3:6f956bdb3073 15 * GNU General Public License for more details.
wolfSSL 3:6f956bdb3073 16 *
wolfSSL 3:6f956bdb3073 17 * You should have received a copy of the GNU General Public License
wolfSSL 3:6f956bdb3073 18 * along with this program; if not, write to the Free Software
wolfSSL 3:6f956bdb3073 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 3:6f956bdb3073 20 */
wolfSSL 3:6f956bdb3073 21
wolfSSL 3:6f956bdb3073 22
wolfSSL 3:6f956bdb3073 23 #ifdef HAVE_CONFIG_H
wolfSSL 3:6f956bdb3073 24 #include <config.h>
wolfSSL 3:6f956bdb3073 25 #endif
wolfSSL 3:6f956bdb3073 26
wolfSSL 3:6f956bdb3073 27 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 3:6f956bdb3073 28 #include <wolfssl/wolfcrypt/signature.h>
wolfSSL 3:6f956bdb3073 29 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 3:6f956bdb3073 30 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 3:6f956bdb3073 31 #ifndef NO_ASN
wolfSSL 3:6f956bdb3073 32 #include <wolfssl/wolfcrypt/asn.h>
wolfSSL 3:6f956bdb3073 33 #endif
wolfSSL 3:6f956bdb3073 34 #ifdef HAVE_ECC
wolfSSL 3:6f956bdb3073 35 #include <wolfssl/wolfcrypt/ecc.h>
wolfSSL 3:6f956bdb3073 36 #endif
wolfSSL 3:6f956bdb3073 37 #ifndef NO_RSA
wolfSSL 3:6f956bdb3073 38 #include <wolfssl/wolfcrypt/rsa.h>
wolfSSL 3:6f956bdb3073 39 #endif
wolfSSL 3:6f956bdb3073 40
wolfSSL 3:6f956bdb3073 41 /* If ECC and RSA are disabled then disable signature wrapper */
wolfSSL 3:6f956bdb3073 42 #if (!defined(HAVE_ECC) || (defined(HAVE_ECC) && !defined(HAVE_ECC_SIGN) \
wolfSSL 3:6f956bdb3073 43 && !defined(HAVE_ECC_VERIFY))) && defined(NO_RSA)
wolfSSL 3:6f956bdb3073 44 #undef NO_SIG_WRAPPER
wolfSSL 3:6f956bdb3073 45 #define NO_SIG_WRAPPER
wolfSSL 3:6f956bdb3073 46 #endif
wolfSSL 3:6f956bdb3073 47
wolfSSL 3:6f956bdb3073 48 /* Signature wrapper disabled check */
wolfSSL 3:6f956bdb3073 49 #ifndef NO_SIG_WRAPPER
wolfSSL 3:6f956bdb3073 50
wolfSSL 3:6f956bdb3073 51 #if !defined(NO_RSA) && !defined(NO_ASN)
wolfSSL 3:6f956bdb3073 52 static int wc_SignatureDerEncode(enum wc_HashType hash_type, byte** hash_data,
wolfSSL 3:6f956bdb3073 53 word32* hash_len)
wolfSSL 3:6f956bdb3073 54 {
wolfSSL 3:6f956bdb3073 55 int ret = wc_HashGetOID(hash_type);
wolfSSL 3:6f956bdb3073 56 if (ret > 0) {
wolfSSL 3:6f956bdb3073 57 int oid = ret;
wolfSSL 3:6f956bdb3073 58
wolfSSL 3:6f956bdb3073 59 /* Allocate buffer for hash and max DER encoded */
wolfSSL 3:6f956bdb3073 60 word32 digest_len = *hash_len + MAX_DER_DIGEST_SZ;
wolfSSL 3:6f956bdb3073 61 byte *digest_buf = (byte*)XMALLOC(digest_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 62 if (digest_buf) {
wolfSSL 3:6f956bdb3073 63 ret = wc_EncodeSignature(digest_buf, *hash_data, *hash_len, oid);
wolfSSL 3:6f956bdb3073 64 if (ret > 0) {
wolfSSL 3:6f956bdb3073 65 digest_len = ret;
wolfSSL 3:6f956bdb3073 66
wolfSSL 3:6f956bdb3073 67 /* Replace hash with digest (DER encoding + hash) */
wolfSSL 3:6f956bdb3073 68 XFREE(*hash_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 69 *hash_data = digest_buf;
wolfSSL 3:6f956bdb3073 70 *hash_len = digest_len;
wolfSSL 3:6f956bdb3073 71 }
wolfSSL 3:6f956bdb3073 72 else {
wolfSSL 3:6f956bdb3073 73 XFREE(digest_buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 74 }
wolfSSL 3:6f956bdb3073 75 }
wolfSSL 3:6f956bdb3073 76 else {
wolfSSL 3:6f956bdb3073 77 ret = MEMORY_E;
wolfSSL 3:6f956bdb3073 78 }
wolfSSL 3:6f956bdb3073 79 }
wolfSSL 3:6f956bdb3073 80 return ret;
wolfSSL 3:6f956bdb3073 81 }
wolfSSL 3:6f956bdb3073 82 #endif /* !NO_RSA && !NO_ASN */
wolfSSL 3:6f956bdb3073 83
wolfSSL 3:6f956bdb3073 84 int wc_SignatureGetSize(enum wc_SignatureType sig_type,
wolfSSL 3:6f956bdb3073 85 const void* key, word32 key_len)
wolfSSL 3:6f956bdb3073 86 {
wolfSSL 3:6f956bdb3073 87 int sig_len = BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 88
wolfSSL 3:6f956bdb3073 89 /* Suppress possible unused args if all signature types are disabled */
wolfSSL 3:6f956bdb3073 90 (void)key;
wolfSSL 3:6f956bdb3073 91 (void)key_len;
wolfSSL 3:6f956bdb3073 92
wolfSSL 3:6f956bdb3073 93 switch(sig_type) {
wolfSSL 3:6f956bdb3073 94 case WC_SIGNATURE_TYPE_ECC:
wolfSSL 3:6f956bdb3073 95 #ifdef HAVE_ECC
wolfSSL 3:6f956bdb3073 96 /* Santity check that void* key is at least ecc_key in size */
wolfSSL 3:6f956bdb3073 97 if (key_len >= sizeof(ecc_key)) {
wolfSSL 3:6f956bdb3073 98 sig_len = wc_ecc_sig_size((ecc_key*)key);
wolfSSL 3:6f956bdb3073 99 }
wolfSSL 3:6f956bdb3073 100 else {
wolfSSL 3:6f956bdb3073 101 WOLFSSL_MSG("wc_SignatureGetSize: Invalid ECC key size");
wolfSSL 3:6f956bdb3073 102 }
wolfSSL 3:6f956bdb3073 103 #else
wolfSSL 3:6f956bdb3073 104 sig_len = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 105 #endif
wolfSSL 3:6f956bdb3073 106 break;
wolfSSL 3:6f956bdb3073 107
wolfSSL 3:6f956bdb3073 108 case WC_SIGNATURE_TYPE_RSA_W_ENC:
wolfSSL 3:6f956bdb3073 109 case WC_SIGNATURE_TYPE_RSA:
wolfSSL 3:6f956bdb3073 110 #ifndef NO_RSA
wolfSSL 3:6f956bdb3073 111 /* Santity check that void* key is at least RsaKey in size */
wolfSSL 3:6f956bdb3073 112 if (key_len >= sizeof(RsaKey)) {
wolfSSL 3:6f956bdb3073 113 sig_len = wc_RsaEncryptSize((RsaKey*)key);
wolfSSL 3:6f956bdb3073 114 }
wolfSSL 3:6f956bdb3073 115 else {
wolfSSL 3:6f956bdb3073 116 WOLFSSL_MSG("wc_SignatureGetSize: Invalid RsaKey key size");
wolfSSL 3:6f956bdb3073 117 }
wolfSSL 3:6f956bdb3073 118 #else
wolfSSL 3:6f956bdb3073 119 sig_len = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 120 #endif
wolfSSL 3:6f956bdb3073 121 break;
wolfSSL 3:6f956bdb3073 122
wolfSSL 3:6f956bdb3073 123 case WC_SIGNATURE_TYPE_NONE:
wolfSSL 3:6f956bdb3073 124 default:
wolfSSL 3:6f956bdb3073 125 sig_len = BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 126 break;
wolfSSL 3:6f956bdb3073 127 }
wolfSSL 3:6f956bdb3073 128 return sig_len;
wolfSSL 3:6f956bdb3073 129 }
wolfSSL 3:6f956bdb3073 130
wolfSSL 3:6f956bdb3073 131 int wc_SignatureVerify(
wolfSSL 3:6f956bdb3073 132 enum wc_HashType hash_type, enum wc_SignatureType sig_type,
wolfSSL 3:6f956bdb3073 133 const byte* data, word32 data_len,
wolfSSL 3:6f956bdb3073 134 const byte* sig, word32 sig_len,
wolfSSL 3:6f956bdb3073 135 const void* key, word32 key_len)
wolfSSL 3:6f956bdb3073 136 {
wolfSSL 3:6f956bdb3073 137 int ret;
wolfSSL 3:6f956bdb3073 138 word32 hash_len;
wolfSSL 3:6f956bdb3073 139 byte *hash_data = NULL;
wolfSSL 3:6f956bdb3073 140
wolfSSL 3:6f956bdb3073 141 /* Check arguments */
wolfSSL 3:6f956bdb3073 142 if (data == NULL || data_len <= 0 || sig == NULL || sig_len <= 0 ||
wolfSSL 3:6f956bdb3073 143 key == NULL || key_len <= 0) {
wolfSSL 3:6f956bdb3073 144 return BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 145 }
wolfSSL 3:6f956bdb3073 146
wolfSSL 3:6f956bdb3073 147 /* Validate signature len (1 to max is okay) */
wolfSSL 3:6f956bdb3073 148 if ((int)sig_len > wc_SignatureGetSize(sig_type, key, key_len)) {
wolfSSL 3:6f956bdb3073 149 WOLFSSL_MSG("wc_SignatureVerify: Invalid sig type/len");
wolfSSL 3:6f956bdb3073 150 return BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 151 }
wolfSSL 3:6f956bdb3073 152
wolfSSL 3:6f956bdb3073 153 /* Validate hash size */
wolfSSL 3:6f956bdb3073 154 ret = wc_HashGetDigestSize(hash_type);
wolfSSL 3:6f956bdb3073 155 if (ret < 0) {
wolfSSL 3:6f956bdb3073 156 WOLFSSL_MSG("wc_SignatureVerify: Invalid hash type/len");
wolfSSL 3:6f956bdb3073 157 return ret;
wolfSSL 3:6f956bdb3073 158 }
wolfSSL 3:6f956bdb3073 159 hash_len = ret;
wolfSSL 3:6f956bdb3073 160
wolfSSL 3:6f956bdb3073 161 /* Allocate temporary buffer for hash data */
wolfSSL 3:6f956bdb3073 162 hash_data = (byte*)XMALLOC(hash_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 163 if (hash_data == NULL) {
wolfSSL 3:6f956bdb3073 164 return MEMORY_E;
wolfSSL 3:6f956bdb3073 165 }
wolfSSL 3:6f956bdb3073 166
wolfSSL 3:6f956bdb3073 167 /* Perform hash of data */
wolfSSL 3:6f956bdb3073 168 ret = wc_Hash(hash_type, data, data_len, hash_data, hash_len);
wolfSSL 3:6f956bdb3073 169 if(ret == 0) {
wolfSSL 3:6f956bdb3073 170 /* Verify signature using hash as data */
wolfSSL 3:6f956bdb3073 171 switch(sig_type) {
wolfSSL 3:6f956bdb3073 172 case WC_SIGNATURE_TYPE_ECC:
wolfSSL 3:6f956bdb3073 173 {
wolfSSL 3:6f956bdb3073 174 #if defined(HAVE_ECC) && defined(HAVE_ECC_VERIFY)
wolfSSL 3:6f956bdb3073 175 int is_valid_sig = 0;
wolfSSL 3:6f956bdb3073 176
wolfSSL 3:6f956bdb3073 177 /* Perform verification of signature using provided ECC key */
wolfSSL 3:6f956bdb3073 178 ret = wc_ecc_verify_hash(sig, sig_len, hash_data, hash_len, &is_valid_sig, (ecc_key*)key);
wolfSSL 3:6f956bdb3073 179 if (ret != 0 || is_valid_sig != 1) {
wolfSSL 3:6f956bdb3073 180 ret = SIG_VERIFY_E;
wolfSSL 3:6f956bdb3073 181 }
wolfSSL 3:6f956bdb3073 182 #else
wolfSSL 3:6f956bdb3073 183 ret = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 184 #endif
wolfSSL 3:6f956bdb3073 185 break;
wolfSSL 3:6f956bdb3073 186 }
wolfSSL 3:6f956bdb3073 187
wolfSSL 3:6f956bdb3073 188 case WC_SIGNATURE_TYPE_RSA_W_ENC:
wolfSSL 3:6f956bdb3073 189 #if defined(NO_RSA) || defined(NO_ASN)
wolfSSL 3:6f956bdb3073 190 ret = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 191 break;
wolfSSL 3:6f956bdb3073 192 #else
wolfSSL 3:6f956bdb3073 193 ret = wc_SignatureDerEncode(hash_type, &hash_data, &hash_len);
wolfSSL 3:6f956bdb3073 194 /* Check for error */
wolfSSL 3:6f956bdb3073 195 if (ret < 0) {
wolfSSL 3:6f956bdb3073 196 break;
wolfSSL 3:6f956bdb3073 197 }
wolfSSL 3:6f956bdb3073 198 /* Otherwise fall-through and perform normal RSA verify against updated
wolfSSL 3:6f956bdb3073 199 * DER encoding + hash */
wolfSSL 3:6f956bdb3073 200 #endif
wolfSSL 3:6f956bdb3073 201
wolfSSL 3:6f956bdb3073 202 case WC_SIGNATURE_TYPE_RSA:
wolfSSL 3:6f956bdb3073 203 {
wolfSSL 3:6f956bdb3073 204 #ifndef NO_RSA
wolfSSL 3:6f956bdb3073 205 word32 plain_len = hash_len;
wolfSSL 3:6f956bdb3073 206 byte *plain_data;
wolfSSL 3:6f956bdb3073 207
wolfSSL 3:6f956bdb3073 208 /* Make sure the plain text output is at least key size */
wolfSSL 3:6f956bdb3073 209 if (plain_len < sig_len) {
wolfSSL 3:6f956bdb3073 210 plain_len = sig_len;
wolfSSL 3:6f956bdb3073 211 }
wolfSSL 3:6f956bdb3073 212 plain_data = (byte*)XMALLOC(hash_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 213 if (plain_data) {
wolfSSL 3:6f956bdb3073 214 /* Perform verification of signature using provided RSA key */
wolfSSL 3:6f956bdb3073 215 ret = wc_RsaSSL_Verify(sig, sig_len, plain_data, plain_len,
wolfSSL 3:6f956bdb3073 216 (RsaKey*)key);
wolfSSL 3:6f956bdb3073 217 if (ret >= 0) {
wolfSSL 3:6f956bdb3073 218 if ((word32)ret == hash_len &&
wolfSSL 3:6f956bdb3073 219 XMEMCMP(plain_data, hash_data, hash_len) == 0) {
wolfSSL 3:6f956bdb3073 220 ret = 0; /* Success */
wolfSSL 3:6f956bdb3073 221 }
wolfSSL 3:6f956bdb3073 222 else {
wolfSSL 3:6f956bdb3073 223 WOLFSSL_MSG("RSA Signature Verify difference!");
wolfSSL 3:6f956bdb3073 224 ret = SIG_VERIFY_E;
wolfSSL 3:6f956bdb3073 225 }
wolfSSL 3:6f956bdb3073 226 }
wolfSSL 3:6f956bdb3073 227 XFREE(plain_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 228 }
wolfSSL 3:6f956bdb3073 229 else {
wolfSSL 3:6f956bdb3073 230 ret = MEMORY_E;
wolfSSL 3:6f956bdb3073 231 }
wolfSSL 3:6f956bdb3073 232 #else
wolfSSL 3:6f956bdb3073 233 ret = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 234 #endif
wolfSSL 3:6f956bdb3073 235 break;
wolfSSL 3:6f956bdb3073 236 }
wolfSSL 3:6f956bdb3073 237
wolfSSL 3:6f956bdb3073 238 case WC_SIGNATURE_TYPE_NONE:
wolfSSL 3:6f956bdb3073 239 default:
wolfSSL 3:6f956bdb3073 240 ret = BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 241 break;
wolfSSL 3:6f956bdb3073 242 }
wolfSSL 3:6f956bdb3073 243 }
wolfSSL 3:6f956bdb3073 244
wolfSSL 3:6f956bdb3073 245 if (hash_data) {
wolfSSL 3:6f956bdb3073 246 XFREE(hash_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 247 }
wolfSSL 3:6f956bdb3073 248
wolfSSL 3:6f956bdb3073 249 return ret;
wolfSSL 3:6f956bdb3073 250 }
wolfSSL 3:6f956bdb3073 251
wolfSSL 3:6f956bdb3073 252 int wc_SignatureGenerate(
wolfSSL 3:6f956bdb3073 253 enum wc_HashType hash_type, enum wc_SignatureType sig_type,
wolfSSL 3:6f956bdb3073 254 const byte* data, word32 data_len,
wolfSSL 3:6f956bdb3073 255 byte* sig, word32 *sig_len,
wolfSSL 3:6f956bdb3073 256 const void* key, word32 key_len, WC_RNG* rng)
wolfSSL 3:6f956bdb3073 257 {
wolfSSL 3:6f956bdb3073 258 int ret;
wolfSSL 3:6f956bdb3073 259 word32 hash_len;
wolfSSL 3:6f956bdb3073 260 byte *hash_data = NULL;
wolfSSL 3:6f956bdb3073 261
wolfSSL 3:6f956bdb3073 262 /* Suppress possible unused arg if all signature types are disabled */
wolfSSL 3:6f956bdb3073 263 (void)rng;
wolfSSL 3:6f956bdb3073 264
wolfSSL 3:6f956bdb3073 265 /* Check arguments */
wolfSSL 3:6f956bdb3073 266 if (data == NULL || data_len <= 0 || sig == NULL || sig_len == NULL ||
wolfSSL 3:6f956bdb3073 267 *sig_len <= 0 || key == NULL || key_len <= 0) {
wolfSSL 3:6f956bdb3073 268 return BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 269 }
wolfSSL 3:6f956bdb3073 270
wolfSSL 3:6f956bdb3073 271 /* Validate signature len (needs to be at least max) */
wolfSSL 3:6f956bdb3073 272 if ((int)*sig_len < wc_SignatureGetSize(sig_type, key, key_len)) {
wolfSSL 3:6f956bdb3073 273 WOLFSSL_MSG("wc_SignatureGenerate: Invalid sig type/len");
wolfSSL 3:6f956bdb3073 274 return BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 275 }
wolfSSL 3:6f956bdb3073 276
wolfSSL 3:6f956bdb3073 277 /* Validate hash size */
wolfSSL 3:6f956bdb3073 278 ret = wc_HashGetDigestSize(hash_type);
wolfSSL 3:6f956bdb3073 279 if (ret < 0) {
wolfSSL 3:6f956bdb3073 280 WOLFSSL_MSG("wc_SignatureGenerate: Invalid hash type/len");
wolfSSL 3:6f956bdb3073 281 return ret;
wolfSSL 3:6f956bdb3073 282 }
wolfSSL 3:6f956bdb3073 283 hash_len = ret;
wolfSSL 3:6f956bdb3073 284
wolfSSL 3:6f956bdb3073 285 /* Allocate temporary buffer for hash data */
wolfSSL 3:6f956bdb3073 286 hash_data = (byte*)XMALLOC(hash_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 287 if (hash_data == NULL) {
wolfSSL 3:6f956bdb3073 288 return MEMORY_E;
wolfSSL 3:6f956bdb3073 289 }
wolfSSL 3:6f956bdb3073 290
wolfSSL 3:6f956bdb3073 291 /* Perform hash of data */
wolfSSL 3:6f956bdb3073 292 ret = wc_Hash(hash_type, data, data_len, hash_data, hash_len);
wolfSSL 3:6f956bdb3073 293 if (ret == 0) {
wolfSSL 3:6f956bdb3073 294 /* Create signature using hash as data */
wolfSSL 3:6f956bdb3073 295 switch(sig_type) {
wolfSSL 3:6f956bdb3073 296 case WC_SIGNATURE_TYPE_ECC:
wolfSSL 3:6f956bdb3073 297 #if defined(HAVE_ECC) && defined(HAVE_ECC_SIGN)
wolfSSL 3:6f956bdb3073 298 /* Create signature using provided ECC key */
wolfSSL 3:6f956bdb3073 299 ret = wc_ecc_sign_hash(hash_data, hash_len, sig, sig_len, rng, (ecc_key*)key);
wolfSSL 3:6f956bdb3073 300 #else
wolfSSL 3:6f956bdb3073 301 ret = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 302 #endif
wolfSSL 3:6f956bdb3073 303 break;
wolfSSL 3:6f956bdb3073 304
wolfSSL 3:6f956bdb3073 305 case WC_SIGNATURE_TYPE_RSA_W_ENC:
wolfSSL 3:6f956bdb3073 306 #if defined(NO_RSA) || defined(NO_ASN)
wolfSSL 3:6f956bdb3073 307 ret = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 308 break;
wolfSSL 3:6f956bdb3073 309 #else
wolfSSL 3:6f956bdb3073 310 ret = wc_SignatureDerEncode(hash_type, &hash_data, &hash_len);
wolfSSL 3:6f956bdb3073 311 /* Check for error */
wolfSSL 3:6f956bdb3073 312 if (ret < 0) {
wolfSSL 3:6f956bdb3073 313 break;
wolfSSL 3:6f956bdb3073 314 }
wolfSSL 3:6f956bdb3073 315 /* Otherwise fall-through and perform normal RSA sign against updated
wolfSSL 3:6f956bdb3073 316 * DER encoding + hash */
wolfSSL 3:6f956bdb3073 317 #endif
wolfSSL 3:6f956bdb3073 318
wolfSSL 3:6f956bdb3073 319 case WC_SIGNATURE_TYPE_RSA:
wolfSSL 3:6f956bdb3073 320 #ifndef NO_RSA
wolfSSL 3:6f956bdb3073 321 /* Create signature using provided RSA key */
wolfSSL 3:6f956bdb3073 322 ret = wc_RsaSSL_Sign(hash_data, hash_len, sig, *sig_len, (RsaKey*)key, rng);
wolfSSL 3:6f956bdb3073 323 if (ret >= 0) {
wolfSSL 3:6f956bdb3073 324 *sig_len = ret;
wolfSSL 3:6f956bdb3073 325 ret = 0; /* Success */
wolfSSL 3:6f956bdb3073 326 }
wolfSSL 3:6f956bdb3073 327 #else
wolfSSL 3:6f956bdb3073 328 ret = SIG_TYPE_E;
wolfSSL 3:6f956bdb3073 329 #endif
wolfSSL 3:6f956bdb3073 330 break;
wolfSSL 3:6f956bdb3073 331
wolfSSL 3:6f956bdb3073 332 case WC_SIGNATURE_TYPE_NONE:
wolfSSL 3:6f956bdb3073 333 default:
wolfSSL 3:6f956bdb3073 334 ret = BAD_FUNC_ARG;
wolfSSL 3:6f956bdb3073 335 break;
wolfSSL 3:6f956bdb3073 336 }
wolfSSL 3:6f956bdb3073 337 }
wolfSSL 3:6f956bdb3073 338
wolfSSL 3:6f956bdb3073 339 if (hash_data) {
wolfSSL 3:6f956bdb3073 340 XFREE(hash_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 3:6f956bdb3073 341 }
wolfSSL 3:6f956bdb3073 342
wolfSSL 3:6f956bdb3073 343 return ret;
wolfSSL 3:6f956bdb3073 344 }
wolfSSL 3:6f956bdb3073 345
wolfSSL 3:6f956bdb3073 346 #endif /* NO_SIG_WRAPPER */
wolfSSL 3:6f956bdb3073 347