Xuyi Wang / wolfSSL

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wolfcrypt/src/signature.c@16:048e5e270a58, 2019-11-19 (annotated)

Committer:
sPymbed
Date:
Tue Nov 19 14:32:16 2019 +0000
Revision:
16:048e5e270a58
Parent:
15:117db924cf7c 
working ssl

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 15:117db924cf7c 1 /* signature.c
wolfSSL 15:117db924cf7c 2 *
wolfSSL 15:117db924cf7c 3 * Copyright (C) 2006-2017 wolfSSL Inc.
wolfSSL 15:117db924cf7c 4 *
wolfSSL 15:117db924cf7c 5 * This file is part of wolfSSL.
wolfSSL 15:117db924cf7c 6 *
wolfSSL 15:117db924cf7c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 15:117db924cf7c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 15:117db924cf7c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 15:117db924cf7c 10 * (at your option) any later version.
wolfSSL 15:117db924cf7c 11 *
wolfSSL 15:117db924cf7c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 15:117db924cf7c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 15:117db924cf7c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 15:117db924cf7c 15 * GNU General Public License for more details.
wolfSSL 15:117db924cf7c 16 *
wolfSSL 15:117db924cf7c 17 * You should have received a copy of the GNU General Public License
wolfSSL 15:117db924cf7c 18 * along with this program; if not, write to the Free Software
wolfSSL 15:117db924cf7c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 15:117db924cf7c 20 */
wolfSSL 15:117db924cf7c 21
wolfSSL 15:117db924cf7c 22
wolfSSL 15:117db924cf7c 23 #ifdef HAVE_CONFIG_H
wolfSSL 15:117db924cf7c 24 #include <config.h>
wolfSSL 15:117db924cf7c 25 #endif
wolfSSL 15:117db924cf7c 26
wolfSSL 15:117db924cf7c 27 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 15:117db924cf7c 28 #include <wolfssl/wolfcrypt/signature.h>
wolfSSL 15:117db924cf7c 29 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 15:117db924cf7c 30 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 15:117db924cf7c 31 #ifndef NO_ASN
wolfSSL 15:117db924cf7c 32 #include <wolfssl/wolfcrypt/asn.h>
wolfSSL 15:117db924cf7c 33 #endif
wolfSSL 15:117db924cf7c 34 #ifdef HAVE_ECC
wolfSSL 15:117db924cf7c 35 #include <wolfssl/wolfcrypt/ecc.h>
wolfSSL 15:117db924cf7c 36 #endif
wolfSSL 15:117db924cf7c 37 #ifndef NO_RSA
wolfSSL 15:117db924cf7c 38 #include <wolfssl/wolfcrypt/rsa.h>
wolfSSL 15:117db924cf7c 39 #endif
wolfSSL 15:117db924cf7c 40
wolfSSL 15:117db924cf7c 41 /* If ECC and RSA are disabled then disable signature wrapper */
wolfSSL 15:117db924cf7c 42 #if (!defined(HAVE_ECC) || (defined(HAVE_ECC) && !defined(HAVE_ECC_SIGN) \
wolfSSL 15:117db924cf7c 43 && !defined(HAVE_ECC_VERIFY))) && defined(NO_RSA)
wolfSSL 15:117db924cf7c 44 #undef NO_SIG_WRAPPER
wolfSSL 15:117db924cf7c 45 #define NO_SIG_WRAPPER
wolfSSL 15:117db924cf7c 46 #endif
wolfSSL 15:117db924cf7c 47
wolfSSL 15:117db924cf7c 48 /* Signature wrapper disabled check */
wolfSSL 15:117db924cf7c 49 #ifndef NO_SIG_WRAPPER
wolfSSL 15:117db924cf7c 50
wolfSSL 15:117db924cf7c 51 #if !defined(NO_RSA) && !defined(NO_ASN)
wolfSSL 15:117db924cf7c 52 static int wc_SignatureDerEncode(enum wc_HashType hash_type, byte** hash_data,
wolfSSL 15:117db924cf7c 53 word32* hash_len)
wolfSSL 15:117db924cf7c 54 {
wolfSSL 15:117db924cf7c 55 int ret = wc_HashGetOID(hash_type);
wolfSSL 15:117db924cf7c 56 if (ret > 0) {
wolfSSL 15:117db924cf7c 57 int oid = ret;
wolfSSL 15:117db924cf7c 58
wolfSSL 15:117db924cf7c 59 /* Allocate buffer for hash and max DER encoded */
wolfSSL 15:117db924cf7c 60 word32 digest_len = *hash_len + MAX_DER_DIGEST_SZ;
wolfSSL 15:117db924cf7c 61 byte *digest_buf = (byte*)XMALLOC(digest_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 62 if (digest_buf) {
wolfSSL 15:117db924cf7c 63 ret = wc_EncodeSignature(digest_buf, *hash_data, *hash_len, oid);
wolfSSL 15:117db924cf7c 64 if (ret > 0) {
wolfSSL 15:117db924cf7c 65 digest_len = ret;
wolfSSL 15:117db924cf7c 66 ret = 0;
wolfSSL 15:117db924cf7c 67
wolfSSL 15:117db924cf7c 68 /* Replace hash with digest (DER encoding + hash) */
wolfSSL 15:117db924cf7c 69 XFREE(*hash_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 70 *hash_data = digest_buf;
wolfSSL 15:117db924cf7c 71 *hash_len = digest_len;
wolfSSL 15:117db924cf7c 72 }
wolfSSL 15:117db924cf7c 73 else {
wolfSSL 15:117db924cf7c 74 XFREE(digest_buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 75 }
wolfSSL 15:117db924cf7c 76 }
wolfSSL 15:117db924cf7c 77 else {
wolfSSL 15:117db924cf7c 78 ret = MEMORY_E;
wolfSSL 15:117db924cf7c 79 }
wolfSSL 15:117db924cf7c 80 }
wolfSSL 15:117db924cf7c 81 return ret;
wolfSSL 15:117db924cf7c 82 }
wolfSSL 15:117db924cf7c 83 #endif /* !NO_RSA && !NO_ASN */
wolfSSL 15:117db924cf7c 84
wolfSSL 15:117db924cf7c 85 int wc_SignatureGetSize(enum wc_SignatureType sig_type,
wolfSSL 15:117db924cf7c 86 const void* key, word32 key_len)
wolfSSL 15:117db924cf7c 87 {
wolfSSL 15:117db924cf7c 88 int sig_len = BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 89
wolfSSL 15:117db924cf7c 90 /* Suppress possible unused args if all signature types are disabled */
wolfSSL 15:117db924cf7c 91 (void)key;
wolfSSL 15:117db924cf7c 92 (void)key_len;
wolfSSL 15:117db924cf7c 93
wolfSSL 15:117db924cf7c 94 switch(sig_type) {
wolfSSL 15:117db924cf7c 95 case WC_SIGNATURE_TYPE_ECC:
wolfSSL 15:117db924cf7c 96 #ifdef HAVE_ECC
wolfSSL 15:117db924cf7c 97 /* Sanity check that void* key is at least ecc_key in size */
wolfSSL 15:117db924cf7c 98 if (key_len >= sizeof(ecc_key)) {
wolfSSL 15:117db924cf7c 99 sig_len = wc_ecc_sig_size((ecc_key*)key);
wolfSSL 15:117db924cf7c 100 }
wolfSSL 15:117db924cf7c 101 else {
wolfSSL 15:117db924cf7c 102 WOLFSSL_MSG("wc_SignatureGetSize: Invalid ECC key size");
wolfSSL 15:117db924cf7c 103 }
wolfSSL 15:117db924cf7c 104 #else
wolfSSL 15:117db924cf7c 105 sig_len = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 106 #endif
wolfSSL 15:117db924cf7c 107 break;
wolfSSL 15:117db924cf7c 108
wolfSSL 15:117db924cf7c 109 case WC_SIGNATURE_TYPE_RSA_W_ENC:
wolfSSL 15:117db924cf7c 110 case WC_SIGNATURE_TYPE_RSA:
wolfSSL 15:117db924cf7c 111 #ifndef NO_RSA
wolfSSL 15:117db924cf7c 112 /* Sanity check that void* key is at least RsaKey in size */
wolfSSL 15:117db924cf7c 113 if (key_len >= sizeof(RsaKey)) {
wolfSSL 15:117db924cf7c 114 sig_len = wc_RsaEncryptSize((RsaKey*)key);
wolfSSL 15:117db924cf7c 115 }
wolfSSL 15:117db924cf7c 116 else {
wolfSSL 15:117db924cf7c 117 WOLFSSL_MSG("wc_SignatureGetSize: Invalid RsaKey key size");
wolfSSL 15:117db924cf7c 118 }
wolfSSL 15:117db924cf7c 119 #else
wolfSSL 15:117db924cf7c 120 sig_len = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 121 #endif
wolfSSL 15:117db924cf7c 122 break;
wolfSSL 15:117db924cf7c 123
wolfSSL 15:117db924cf7c 124 case WC_SIGNATURE_TYPE_NONE:
wolfSSL 15:117db924cf7c 125 default:
wolfSSL 15:117db924cf7c 126 sig_len = BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 127 break;
wolfSSL 15:117db924cf7c 128 }
wolfSSL 15:117db924cf7c 129 return sig_len;
wolfSSL 15:117db924cf7c 130 }
wolfSSL 15:117db924cf7c 131
wolfSSL 15:117db924cf7c 132 int wc_SignatureVerifyHash(
wolfSSL 15:117db924cf7c 133 enum wc_HashType hash_type, enum wc_SignatureType sig_type,
wolfSSL 15:117db924cf7c 134 const byte* hash_data, word32 hash_len,
wolfSSL 15:117db924cf7c 135 const byte* sig, word32 sig_len,
wolfSSL 15:117db924cf7c 136 const void* key, word32 key_len)
wolfSSL 15:117db924cf7c 137 {
wolfSSL 15:117db924cf7c 138 int ret;
wolfSSL 15:117db924cf7c 139
wolfSSL 15:117db924cf7c 140 /* Check arguments */
wolfSSL 15:117db924cf7c 141 if (hash_data == NULL || hash_len <= 0 ||
wolfSSL 15:117db924cf7c 142 sig == NULL || sig_len <= 0 ||
wolfSSL 15:117db924cf7c 143 key == NULL || key_len <= 0) {
wolfSSL 15:117db924cf7c 144 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 145 }
wolfSSL 15:117db924cf7c 146
wolfSSL 15:117db924cf7c 147 /* Validate signature len (1 to max is okay) */
wolfSSL 15:117db924cf7c 148 if ((int)sig_len > wc_SignatureGetSize(sig_type, key, key_len)) {
wolfSSL 15:117db924cf7c 149 WOLFSSL_MSG("wc_SignatureVerify: Invalid sig type/len");
wolfSSL 15:117db924cf7c 150 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 151 }
wolfSSL 15:117db924cf7c 152
wolfSSL 15:117db924cf7c 153 /* Validate hash size */
wolfSSL 15:117db924cf7c 154 ret = wc_HashGetDigestSize(hash_type);
wolfSSL 15:117db924cf7c 155 if (ret < 0) {
wolfSSL 15:117db924cf7c 156 WOLFSSL_MSG("wc_SignatureVerify: Invalid hash type/len");
wolfSSL 15:117db924cf7c 157 return ret;
wolfSSL 15:117db924cf7c 158 }
wolfSSL 15:117db924cf7c 159 ret = 0;
wolfSSL 15:117db924cf7c 160
wolfSSL 15:117db924cf7c 161 /* Verify signature using hash */
wolfSSL 15:117db924cf7c 162 switch (sig_type) {
wolfSSL 15:117db924cf7c 163 case WC_SIGNATURE_TYPE_ECC:
wolfSSL 15:117db924cf7c 164 {
wolfSSL 15:117db924cf7c 165 #if defined(HAVE_ECC) && defined(HAVE_ECC_VERIFY)
wolfSSL 15:117db924cf7c 166 int is_valid_sig = 0;
wolfSSL 15:117db924cf7c 167
wolfSSL 15:117db924cf7c 168 /* Perform verification of signature using provided ECC key */
wolfSSL 15:117db924cf7c 169 do {
wolfSSL 15:117db924cf7c 170 #ifdef WOLFSSL_ASYNC_CRYPT
wolfSSL 15:117db924cf7c 171 ret = wc_AsyncWait(ret, &((ecc_key*)key)->asyncDev,
wolfSSL 15:117db924cf7c 172 WC_ASYNC_FLAG_CALL_AGAIN);
wolfSSL 15:117db924cf7c 173 #endif
wolfSSL 15:117db924cf7c 174 if (ret >= 0)
wolfSSL 15:117db924cf7c 175 ret = wc_ecc_verify_hash(sig, sig_len, hash_data, hash_len,
wolfSSL 15:117db924cf7c 176 &is_valid_sig, (ecc_key*)key);
wolfSSL 15:117db924cf7c 177 } while (ret == WC_PENDING_E);
wolfSSL 15:117db924cf7c 178 if (ret != 0 || is_valid_sig != 1) {
wolfSSL 15:117db924cf7c 179 ret = SIG_VERIFY_E;
wolfSSL 15:117db924cf7c 180 }
wolfSSL 15:117db924cf7c 181 #else
wolfSSL 15:117db924cf7c 182 ret = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 183 #endif
wolfSSL 15:117db924cf7c 184 break;
wolfSSL 15:117db924cf7c 185 }
wolfSSL 15:117db924cf7c 186
wolfSSL 15:117db924cf7c 187 case WC_SIGNATURE_TYPE_RSA_W_ENC:
wolfSSL 15:117db924cf7c 188 case WC_SIGNATURE_TYPE_RSA:
wolfSSL 15:117db924cf7c 189 {
wolfSSL 15:117db924cf7c 190 #ifndef NO_RSA
wolfSSL 15:117db924cf7c 191 word32 plain_len = hash_len;
wolfSSL 15:117db924cf7c 192 byte *plain_data;
wolfSSL 15:117db924cf7c 193
wolfSSL 15:117db924cf7c 194 /* Make sure the plain text output is at least key size */
wolfSSL 15:117db924cf7c 195 if (plain_len < sig_len) {
wolfSSL 15:117db924cf7c 196 plain_len = sig_len;
wolfSSL 15:117db924cf7c 197 }
wolfSSL 15:117db924cf7c 198 plain_data = (byte*)XMALLOC(plain_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 199 if (plain_data) {
wolfSSL 15:117db924cf7c 200 /* Perform verification of signature using provided RSA key */
wolfSSL 15:117db924cf7c 201 do {
wolfSSL 15:117db924cf7c 202 #ifdef WOLFSSL_ASYNC_CRYPT
wolfSSL 15:117db924cf7c 203 ret = wc_AsyncWait(ret, &((RsaKey*)key)->asyncDev,
wolfSSL 15:117db924cf7c 204 WC_ASYNC_FLAG_CALL_AGAIN);
wolfSSL 15:117db924cf7c 205 #endif
wolfSSL 15:117db924cf7c 206 if (ret >= 0)
wolfSSL 15:117db924cf7c 207 ret = wc_RsaSSL_Verify(sig, sig_len, plain_data,
wolfSSL 15:117db924cf7c 208 plain_len, (RsaKey*)key);
wolfSSL 15:117db924cf7c 209 } while (ret == WC_PENDING_E);
wolfSSL 15:117db924cf7c 210 if (ret >= 0) {
wolfSSL 15:117db924cf7c 211 if ((word32)ret == hash_len &&
wolfSSL 15:117db924cf7c 212 XMEMCMP(plain_data, hash_data, hash_len) == 0) {
wolfSSL 15:117db924cf7c 213 ret = 0; /* Success */
wolfSSL 15:117db924cf7c 214 }
wolfSSL 15:117db924cf7c 215 else {
wolfSSL 15:117db924cf7c 216 WOLFSSL_MSG("RSA Signature Verify difference!");
wolfSSL 15:117db924cf7c 217 ret = SIG_VERIFY_E;
wolfSSL 15:117db924cf7c 218 }
wolfSSL 15:117db924cf7c 219 }
wolfSSL 15:117db924cf7c 220 XFREE(plain_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 221 }
wolfSSL 15:117db924cf7c 222 else {
wolfSSL 15:117db924cf7c 223 ret = MEMORY_E;
wolfSSL 15:117db924cf7c 224 }
wolfSSL 15:117db924cf7c 225 #else
wolfSSL 15:117db924cf7c 226 ret = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 227 #endif
wolfSSL 15:117db924cf7c 228 break;
wolfSSL 15:117db924cf7c 229 }
wolfSSL 15:117db924cf7c 230
wolfSSL 15:117db924cf7c 231 case WC_SIGNATURE_TYPE_NONE:
wolfSSL 15:117db924cf7c 232 default:
wolfSSL 15:117db924cf7c 233 ret = BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 234 break;
wolfSSL 15:117db924cf7c 235 }
wolfSSL 15:117db924cf7c 236
wolfSSL 15:117db924cf7c 237 return ret;
wolfSSL 15:117db924cf7c 238 }
wolfSSL 15:117db924cf7c 239
wolfSSL 15:117db924cf7c 240 int wc_SignatureVerify(
wolfSSL 15:117db924cf7c 241 enum wc_HashType hash_type, enum wc_SignatureType sig_type,
wolfSSL 15:117db924cf7c 242 const byte* data, word32 data_len,
wolfSSL 15:117db924cf7c 243 const byte* sig, word32 sig_len,
wolfSSL 15:117db924cf7c 244 const void* key, word32 key_len)
wolfSSL 15:117db924cf7c 245 {
wolfSSL 15:117db924cf7c 246 int ret;
wolfSSL 15:117db924cf7c 247 word32 hash_len;
wolfSSL 15:117db924cf7c 248 byte *hash_data = NULL;
wolfSSL 15:117db924cf7c 249
wolfSSL 15:117db924cf7c 250 /* Check arguments */
wolfSSL 15:117db924cf7c 251 if (data == NULL || data_len <= 0 ||
wolfSSL 15:117db924cf7c 252 sig == NULL || sig_len <= 0 ||
wolfSSL 15:117db924cf7c 253 key == NULL || key_len <= 0) {
wolfSSL 15:117db924cf7c 254 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 255 }
wolfSSL 15:117db924cf7c 256
wolfSSL 15:117db924cf7c 257 /* Validate signature len (1 to max is okay) */
wolfSSL 15:117db924cf7c 258 if ((int)sig_len > wc_SignatureGetSize(sig_type, key, key_len)) {
wolfSSL 15:117db924cf7c 259 WOLFSSL_MSG("wc_SignatureVerify: Invalid sig type/len");
wolfSSL 15:117db924cf7c 260 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 261 }
wolfSSL 15:117db924cf7c 262
wolfSSL 15:117db924cf7c 263 /* Validate hash size */
wolfSSL 15:117db924cf7c 264 ret = wc_HashGetDigestSize(hash_type);
wolfSSL 15:117db924cf7c 265 if (ret < 0) {
wolfSSL 15:117db924cf7c 266 WOLFSSL_MSG("wc_SignatureVerify: Invalid hash type/len");
wolfSSL 15:117db924cf7c 267 return ret;
wolfSSL 15:117db924cf7c 268 }
wolfSSL 15:117db924cf7c 269 hash_len = ret;
wolfSSL 15:117db924cf7c 270
wolfSSL 15:117db924cf7c 271 /* Allocate temporary buffer for hash data */
wolfSSL 15:117db924cf7c 272 hash_data = (byte*)XMALLOC(hash_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 273 if (hash_data == NULL) {
wolfSSL 15:117db924cf7c 274 return MEMORY_E;
wolfSSL 15:117db924cf7c 275 }
wolfSSL 15:117db924cf7c 276
wolfSSL 15:117db924cf7c 277 /* Perform hash of data */
wolfSSL 15:117db924cf7c 278 ret = wc_Hash(hash_type, data, data_len, hash_data, hash_len);
wolfSSL 15:117db924cf7c 279 if (ret == 0) {
wolfSSL 15:117db924cf7c 280 /* Handle RSA with DER encoding */
wolfSSL 15:117db924cf7c 281 if (sig_type == WC_SIGNATURE_TYPE_RSA_W_ENC) {
wolfSSL 15:117db924cf7c 282 #if defined(NO_RSA) || defined(NO_ASN)
wolfSSL 15:117db924cf7c 283 ret = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 284 #else
wolfSSL 15:117db924cf7c 285 ret = wc_SignatureDerEncode(hash_type, &hash_data, &hash_len);
wolfSSL 15:117db924cf7c 286 #endif
wolfSSL 15:117db924cf7c 287 }
wolfSSL 15:117db924cf7c 288
wolfSSL 15:117db924cf7c 289 if (ret == 0) {
wolfSSL 15:117db924cf7c 290 /* Verify signature using hash */
wolfSSL 15:117db924cf7c 291 ret = wc_SignatureVerifyHash(hash_type, sig_type,
wolfSSL 15:117db924cf7c 292 hash_data, hash_len, sig, sig_len, key, key_len);
wolfSSL 15:117db924cf7c 293 }
wolfSSL 15:117db924cf7c 294 }
wolfSSL 15:117db924cf7c 295
wolfSSL 15:117db924cf7c 296 if (hash_data) {
wolfSSL 15:117db924cf7c 297 XFREE(hash_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 298 }
wolfSSL 15:117db924cf7c 299
wolfSSL 15:117db924cf7c 300 return ret;
wolfSSL 15:117db924cf7c 301 }
wolfSSL 15:117db924cf7c 302
wolfSSL 15:117db924cf7c 303
wolfSSL 15:117db924cf7c 304 int wc_SignatureGenerateHash(
wolfSSL 15:117db924cf7c 305 enum wc_HashType hash_type, enum wc_SignatureType sig_type,
wolfSSL 15:117db924cf7c 306 const byte* hash_data, word32 hash_len,
wolfSSL 15:117db924cf7c 307 byte* sig, word32 *sig_len,
wolfSSL 15:117db924cf7c 308 const void* key, word32 key_len, WC_RNG* rng)
wolfSSL 15:117db924cf7c 309 {
wolfSSL 15:117db924cf7c 310 int ret;
wolfSSL 15:117db924cf7c 311
wolfSSL 15:117db924cf7c 312 /* Suppress possible unused arg if all signature types are disabled */
wolfSSL 15:117db924cf7c 313 (void)rng;
wolfSSL 15:117db924cf7c 314
wolfSSL 15:117db924cf7c 315 /* Check arguments */
wolfSSL 15:117db924cf7c 316 if (hash_data == NULL || hash_len <= 0 ||
wolfSSL 15:117db924cf7c 317 sig == NULL || sig_len == NULL || *sig_len <= 0 ||
wolfSSL 15:117db924cf7c 318 key == NULL || key_len <= 0) {
wolfSSL 15:117db924cf7c 319 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 320 }
wolfSSL 15:117db924cf7c 321
wolfSSL 15:117db924cf7c 322 /* Validate signature len (needs to be at least max) */
wolfSSL 15:117db924cf7c 323 if ((int)*sig_len < wc_SignatureGetSize(sig_type, key, key_len)) {
wolfSSL 15:117db924cf7c 324 WOLFSSL_MSG("wc_SignatureGenerate: Invalid sig type/len");
wolfSSL 15:117db924cf7c 325 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 326 }
wolfSSL 15:117db924cf7c 327
wolfSSL 15:117db924cf7c 328 /* Validate hash size */
wolfSSL 15:117db924cf7c 329 ret = wc_HashGetDigestSize(hash_type);
wolfSSL 15:117db924cf7c 330 if (ret < 0) {
wolfSSL 15:117db924cf7c 331 WOLFSSL_MSG("wc_SignatureGenerate: Invalid hash type/len");
wolfSSL 15:117db924cf7c 332 return ret;
wolfSSL 15:117db924cf7c 333 }
wolfSSL 15:117db924cf7c 334 ret = 0;
wolfSSL 15:117db924cf7c 335
wolfSSL 15:117db924cf7c 336 /* Create signature using hash as data */
wolfSSL 15:117db924cf7c 337 switch (sig_type) {
wolfSSL 15:117db924cf7c 338 case WC_SIGNATURE_TYPE_ECC:
wolfSSL 15:117db924cf7c 339 #if defined(HAVE_ECC) && defined(HAVE_ECC_SIGN)
wolfSSL 15:117db924cf7c 340 /* Create signature using provided ECC key */
wolfSSL 15:117db924cf7c 341 do {
wolfSSL 15:117db924cf7c 342 #ifdef WOLFSSL_ASYNC_CRYPT
wolfSSL 15:117db924cf7c 343 ret = wc_AsyncWait(ret, &((ecc_key*)key)->asyncDev,
wolfSSL 15:117db924cf7c 344 WC_ASYNC_FLAG_CALL_AGAIN);
wolfSSL 15:117db924cf7c 345 #endif
wolfSSL 15:117db924cf7c 346 if (ret >= 0)
wolfSSL 15:117db924cf7c 347 ret = wc_ecc_sign_hash(hash_data, hash_len, sig, sig_len,
wolfSSL 15:117db924cf7c 348 rng, (ecc_key*)key);
wolfSSL 15:117db924cf7c 349 } while (ret == WC_PENDING_E);
wolfSSL 15:117db924cf7c 350 #else
wolfSSL 15:117db924cf7c 351 ret = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 352 #endif
wolfSSL 15:117db924cf7c 353 break;
wolfSSL 15:117db924cf7c 354
wolfSSL 15:117db924cf7c 355 case WC_SIGNATURE_TYPE_RSA_W_ENC:
wolfSSL 15:117db924cf7c 356 case WC_SIGNATURE_TYPE_RSA:
wolfSSL 15:117db924cf7c 357 #ifndef NO_RSA
wolfSSL 15:117db924cf7c 358 /* Create signature using provided RSA key */
wolfSSL 15:117db924cf7c 359 do {
wolfSSL 15:117db924cf7c 360 #ifdef WOLFSSL_ASYNC_CRYPT
wolfSSL 15:117db924cf7c 361 ret = wc_AsyncWait(ret, &((RsaKey*)key)->asyncDev,
wolfSSL 15:117db924cf7c 362 WC_ASYNC_FLAG_CALL_AGAIN);
wolfSSL 15:117db924cf7c 363 #endif
wolfSSL 15:117db924cf7c 364 if (ret >= 0)
wolfSSL 15:117db924cf7c 365 ret = wc_RsaSSL_Sign(hash_data, hash_len, sig, *sig_len,
wolfSSL 15:117db924cf7c 366 (RsaKey*)key, rng);
wolfSSL 15:117db924cf7c 367 } while (ret == WC_PENDING_E);
wolfSSL 15:117db924cf7c 368 if (ret >= 0) {
wolfSSL 15:117db924cf7c 369 *sig_len = ret;
wolfSSL 15:117db924cf7c 370 ret = 0; /* Success */
wolfSSL 15:117db924cf7c 371 }
wolfSSL 15:117db924cf7c 372 #else
wolfSSL 15:117db924cf7c 373 ret = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 374 #endif
wolfSSL 15:117db924cf7c 375 break;
wolfSSL 15:117db924cf7c 376
wolfSSL 15:117db924cf7c 377 case WC_SIGNATURE_TYPE_NONE:
wolfSSL 15:117db924cf7c 378 default:
wolfSSL 15:117db924cf7c 379 ret = BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 380 break;
wolfSSL 15:117db924cf7c 381 }
wolfSSL 15:117db924cf7c 382
wolfSSL 15:117db924cf7c 383 return ret;
wolfSSL 15:117db924cf7c 384 }
wolfSSL 15:117db924cf7c 385
wolfSSL 15:117db924cf7c 386 int wc_SignatureGenerate(
wolfSSL 15:117db924cf7c 387 enum wc_HashType hash_type, enum wc_SignatureType sig_type,
wolfSSL 15:117db924cf7c 388 const byte* data, word32 data_len,
wolfSSL 15:117db924cf7c 389 byte* sig, word32 *sig_len,
wolfSSL 15:117db924cf7c 390 const void* key, word32 key_len, WC_RNG* rng)
wolfSSL 15:117db924cf7c 391 {
wolfSSL 15:117db924cf7c 392 int ret;
wolfSSL 15:117db924cf7c 393 word32 hash_len;
wolfSSL 15:117db924cf7c 394 byte *hash_data = NULL;
wolfSSL 15:117db924cf7c 395
wolfSSL 15:117db924cf7c 396 /* Check arguments */
wolfSSL 15:117db924cf7c 397 if (data == NULL || data_len <= 0 ||
wolfSSL 15:117db924cf7c 398 sig == NULL || sig_len == NULL || *sig_len <= 0 ||
wolfSSL 15:117db924cf7c 399 key == NULL || key_len <= 0) {
wolfSSL 15:117db924cf7c 400 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 401 }
wolfSSL 15:117db924cf7c 402
wolfSSL 15:117db924cf7c 403 /* Validate signature len (needs to be at least max) */
wolfSSL 15:117db924cf7c 404 if ((int)*sig_len < wc_SignatureGetSize(sig_type, key, key_len)) {
wolfSSL 15:117db924cf7c 405 WOLFSSL_MSG("wc_SignatureGenerate: Invalid sig type/len");
wolfSSL 15:117db924cf7c 406 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 407 }
wolfSSL 15:117db924cf7c 408
wolfSSL 15:117db924cf7c 409 /* Validate hash size */
wolfSSL 15:117db924cf7c 410 ret = wc_HashGetDigestSize(hash_type);
wolfSSL 15:117db924cf7c 411 if (ret < 0) {
wolfSSL 15:117db924cf7c 412 WOLFSSL_MSG("wc_SignatureGenerate: Invalid hash type/len");
wolfSSL 15:117db924cf7c 413 return ret;
wolfSSL 15:117db924cf7c 414 }
wolfSSL 15:117db924cf7c 415 hash_len = ret;
wolfSSL 15:117db924cf7c 416
wolfSSL 15:117db924cf7c 417 /* Allocate temporary buffer for hash data */
wolfSSL 15:117db924cf7c 418 hash_data = (byte*)XMALLOC(hash_len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 419 if (hash_data == NULL) {
wolfSSL 15:117db924cf7c 420 return MEMORY_E;
wolfSSL 15:117db924cf7c 421 }
wolfSSL 15:117db924cf7c 422
wolfSSL 15:117db924cf7c 423 /* Perform hash of data */
wolfSSL 15:117db924cf7c 424 ret = wc_Hash(hash_type, data, data_len, hash_data, hash_len);
wolfSSL 15:117db924cf7c 425 if (ret == 0) {
wolfSSL 15:117db924cf7c 426 /* Handle RSA with DER encoding */
wolfSSL 15:117db924cf7c 427 if (sig_type == WC_SIGNATURE_TYPE_RSA_W_ENC) {
wolfSSL 15:117db924cf7c 428 #if defined(NO_RSA) || defined(NO_ASN)
wolfSSL 15:117db924cf7c 429 ret = SIG_TYPE_E;
wolfSSL 15:117db924cf7c 430 #else
wolfSSL 15:117db924cf7c 431 ret = wc_SignatureDerEncode(hash_type, &hash_data, &hash_len);
wolfSSL 15:117db924cf7c 432 #endif
wolfSSL 15:117db924cf7c 433 }
wolfSSL 15:117db924cf7c 434
wolfSSL 15:117db924cf7c 435 if (ret == 0) {
wolfSSL 15:117db924cf7c 436 /* Generate signature using hash */
wolfSSL 15:117db924cf7c 437 ret = wc_SignatureGenerateHash(hash_type, sig_type,
wolfSSL 15:117db924cf7c 438 hash_data, hash_len, sig, sig_len, key, key_len, rng);
wolfSSL 15:117db924cf7c 439 }
wolfSSL 15:117db924cf7c 440 }
wolfSSL 15:117db924cf7c 441
wolfSSL 15:117db924cf7c 442 if (hash_data) {
wolfSSL 15:117db924cf7c 443 XFREE(hash_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 15:117db924cf7c 444 }
wolfSSL 15:117db924cf7c 445
wolfSSL 15:117db924cf7c 446 return ret;
wolfSSL 15:117db924cf7c 447 }
wolfSSL 15:117db924cf7c 448
wolfSSL 15:117db924cf7c 449 #endif /* NO_SIG_WRAPPER */
wolfSSL 15:117db924cf7c 450