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| 1 /* crypto/rsa/rsa_ameth.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project 2006. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include "cryptlib.h" | |
| 61 #include <openssl/asn1t.h> | |
| 62 #include <openssl/x509.h> | |
| 63 #include <openssl/rsa.h> | |
| 64 #include <openssl/bn.h> | |
| 65 #ifndef OPENSSL_NO_CMS | |
| 66 #include <openssl/cms.h> | |
| 67 #endif | |
| 68 #include "asn1_locl.h" | |
| 69 | |
| 70 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) | |
| 71 { | |
| 72 unsigned char *penc = NULL; | |
| 73 int penclen; | |
| 74 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); | |
| 75 if (penclen <= 0) | |
| 76 return 0; | |
| 77 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), | |
| 78 V_ASN1_NULL, NULL, penc, penclen)) | |
| 79 return 1; | |
| 80 | |
| 81 OPENSSL_free(penc); | |
| 82 return 0; | |
| 83 } | |
| 84 | |
| 85 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
| 86 { | |
| 87 const unsigned char *p; | |
| 88 int pklen; | |
| 89 RSA *rsa = NULL; | |
| 90 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) | |
| 91 return 0; | |
| 92 if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) | |
| 93 { | |
| 94 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); | |
| 95 return 0; | |
| 96 } | |
| 97 EVP_PKEY_assign_RSA (pkey, rsa); | |
| 98 return 1; | |
| 99 } | |
| 100 | |
| 101 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
| 102 { | |
| 103 if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0 | |
| 104 || BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0) | |
| 105 return 0; | |
| 106 return 1; | |
| 107 } | |
| 108 | |
| 109 static int old_rsa_priv_decode(EVP_PKEY *pkey, | |
| 110 const unsigned char **pder, int derlen) | |
| 111 { | |
| 112 RSA *rsa; | |
| 113 if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen))) | |
| 114 { | |
| 115 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); | |
| 116 return 0; | |
| 117 } | |
| 118 EVP_PKEY_assign_RSA(pkey, rsa); | |
| 119 return 1; | |
| 120 } | |
| 121 | |
| 122 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
| 123 { | |
| 124 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder); | |
| 125 } | |
| 126 | |
| 127 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
| 128 { | |
| 129 unsigned char *rk = NULL; | |
| 130 int rklen; | |
| 131 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); | |
| 132 | |
| 133 if (rklen <= 0) | |
| 134 { | |
| 135 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE); | |
| 136 return 0; | |
| 137 } | |
| 138 | |
| 139 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0, | |
| 140 V_ASN1_NULL, NULL, rk, rklen)) | |
| 141 { | |
| 142 RSAerr(RSA_F_RSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE); | |
| 143 return 0; | |
| 144 } | |
| 145 | |
| 146 return 1; | |
| 147 } | |
| 148 | |
| 149 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) | |
| 150 { | |
| 151 const unsigned char *p; | |
| 152 int pklen; | |
| 153 if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) | |
| 154 return 0; | |
| 155 return old_rsa_priv_decode(pkey, &p, pklen); | |
| 156 } | |
| 157 | |
| 158 static int int_rsa_size(const EVP_PKEY *pkey) | |
| 159 { | |
| 160 return RSA_size(pkey->pkey.rsa); | |
| 161 } | |
| 162 | |
| 163 static int rsa_bits(const EVP_PKEY *pkey) | |
| 164 { | |
| 165 return BN_num_bits(pkey->pkey.rsa->n); | |
| 166 } | |
| 167 | |
| 168 static void int_rsa_free(EVP_PKEY *pkey) | |
| 169 { | |
| 170 RSA_free(pkey->pkey.rsa); | |
| 171 } | |
| 172 | |
| 173 | |
| 174 static void update_buflen(const BIGNUM *b, size_t *pbuflen) | |
| 175 { | |
| 176 size_t i; | |
| 177 if (!b) | |
| 178 return; | |
| 179 if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
| 180 *pbuflen = i; | |
| 181 } | |
| 182 | |
| 183 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv) | |
| 184 { | |
| 185 char *str; | |
| 186 const char *s; | |
| 187 unsigned char *m=NULL; | |
| 188 int ret=0, mod_len = 0; | |
| 189 size_t buf_len=0; | |
| 190 | |
| 191 update_buflen(x->n, &buf_len); | |
| 192 update_buflen(x->e, &buf_len); | |
| 193 | |
| 194 if (priv) | |
| 195 { | |
| 196 update_buflen(x->d, &buf_len); | |
| 197 update_buflen(x->p, &buf_len); | |
| 198 update_buflen(x->q, &buf_len); | |
| 199 update_buflen(x->dmp1, &buf_len); | |
| 200 update_buflen(x->dmq1, &buf_len); | |
| 201 update_buflen(x->iqmp, &buf_len); | |
| 202 } | |
| 203 | |
| 204 m=(unsigned char *)OPENSSL_malloc(buf_len+10); | |
| 205 if (m == NULL) | |
| 206 { | |
| 207 RSAerr(RSA_F_DO_RSA_PRINT,ERR_R_MALLOC_FAILURE); | |
| 208 goto err; | |
| 209 } | |
| 210 | |
| 211 if (x->n != NULL) | |
| 212 mod_len = BN_num_bits(x->n); | |
| 213 | |
| 214 if(!BIO_indent(bp,off,128)) | |
| 215 goto err; | |
| 216 | |
| 217 if (priv && x->d) | |
| 218 { | |
| 219 if (BIO_printf(bp,"Private-Key: (%d bit)\n", mod_len) | |
| 220 <= 0) goto err; | |
| 221 str = "modulus:"; | |
| 222 s = "publicExponent:"; | |
| 223 } | |
| 224 else | |
| 225 { | |
| 226 if (BIO_printf(bp,"Public-Key: (%d bit)\n", mod_len) | |
| 227 <= 0) goto err; | |
| 228 str = "Modulus:"; | |
| 229 s= "Exponent:"; | |
| 230 } | |
| 231 if (!ASN1_bn_print(bp,str,x->n,m,off)) goto err; | |
| 232 if (!ASN1_bn_print(bp,s,x->e,m,off)) | |
| 233 goto err; | |
| 234 if (priv) | |
| 235 { | |
| 236 if (!ASN1_bn_print(bp,"privateExponent:",x->d,m,off)) | |
| 237 goto err; | |
| 238 if (!ASN1_bn_print(bp,"prime1:",x->p,m,off)) | |
| 239 goto err; | |
| 240 if (!ASN1_bn_print(bp,"prime2:",x->q,m,off)) | |
| 241 goto err; | |
| 242 if (!ASN1_bn_print(bp,"exponent1:",x->dmp1,m,off)) | |
| 243 goto err; | |
| 244 if (!ASN1_bn_print(bp,"exponent2:",x->dmq1,m,off)) | |
| 245 goto err; | |
| 246 if (!ASN1_bn_print(bp,"coefficient:",x->iqmp,m,off)) | |
| 247 goto err; | |
| 248 } | |
| 249 ret=1; | |
| 250 err: | |
| 251 if (m != NULL) OPENSSL_free(m); | |
| 252 return(ret); | |
| 253 } | |
| 254 | |
| 255 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
| 256 ASN1_PCTX *ctx) | |
| 257 { | |
| 258 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0); | |
| 259 } | |
| 260 | |
| 261 | |
| 262 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
| 263 ASN1_PCTX *ctx) | |
| 264 { | |
| 265 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); | |
| 266 } | |
| 267 | |
| 268 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, | |
| 269 X509_ALGOR **pmaskHash) | |
| 270 { | |
| 271 const unsigned char *p; | |
| 272 int plen; | |
| 273 RSA_PSS_PARAMS *pss; | |
| 274 | |
| 275 *pmaskHash = NULL; | |
| 276 | |
| 277 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE) | |
| 278 return NULL; | |
| 279 p = alg->parameter->value.sequence->data; | |
| 280 plen = alg->parameter->value.sequence->length; | |
| 281 pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen); | |
| 282 | |
| 283 if (!pss) | |
| 284 return NULL; | |
| 285 | |
| 286 if (pss->maskGenAlgorithm) | |
| 287 { | |
| 288 ASN1_TYPE *param = pss->maskGenAlgorithm->parameter; | |
| 289 if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1 | |
| 290 && param->type == V_ASN1_SEQUENCE) | |
| 291 { | |
| 292 p = param->value.sequence->data; | |
| 293 plen = param->value.sequence->length; | |
| 294 *pmaskHash = d2i_X509_ALGOR(NULL, &p, plen); | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 return pss; | |
| 299 } | |
| 300 | |
| 301 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, | |
| 302 X509_ALGOR *maskHash, int indent) | |
| 303 { | |
| 304 int rv = 0; | |
| 305 if (!pss) | |
| 306 { | |
| 307 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) | |
| 308 return 0; | |
| 309 return 1; | |
| 310 } | |
| 311 if (BIO_puts(bp, "\n") <= 0) | |
| 312 goto err; | |
| 313 if (!BIO_indent(bp, indent, 128)) | |
| 314 goto err; | |
| 315 if (BIO_puts(bp, "Hash Algorithm: ") <= 0) | |
| 316 goto err; | |
| 317 | |
| 318 if (pss->hashAlgorithm) | |
| 319 { | |
| 320 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) | |
| 321 goto err; | |
| 322 } | |
| 323 else if (BIO_puts(bp, "sha1 (default)") <= 0) | |
| 324 goto err; | |
| 325 | |
| 326 if (BIO_puts(bp, "\n") <= 0) | |
| 327 goto err; | |
| 328 | |
| 329 if (!BIO_indent(bp, indent, 128)) | |
| 330 goto err; | |
| 331 | |
| 332 if (BIO_puts(bp, "Mask Algorithm: ") <= 0) | |
| 333 goto err; | |
| 334 if (pss->maskGenAlgorithm) | |
| 335 { | |
| 336 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0) | |
| 337 goto err; | |
| 338 if (BIO_puts(bp, " with ") <= 0) | |
| 339 goto err; | |
| 340 if (maskHash) | |
| 341 { | |
| 342 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) | |
| 343 goto err; | |
| 344 } | |
| 345 else if (BIO_puts(bp, "INVALID") <= 0) | |
| 346 goto err; | |
| 347 } | |
| 348 else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) | |
| 349 goto err; | |
| 350 BIO_puts(bp, "\n"); | |
| 351 | |
| 352 if (!BIO_indent(bp, indent, 128)) | |
| 353 goto err; | |
| 354 if (BIO_puts(bp, "Salt Length: ") <= 0) | |
| 355 goto err; | |
| 356 if (pss->saltLength) | |
| 357 { | |
| 358 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) | |
| 359 goto err; | |
| 360 } | |
| 361 else if (BIO_puts(bp, "20 (default)") <= 0) | |
| 362 goto err; | |
| 363 BIO_puts(bp, "\n"); | |
| 364 | |
| 365 if (!BIO_indent(bp, indent, 128)) | |
| 366 goto err; | |
| 367 if (BIO_puts(bp, "Trailer Field: ") <= 0) | |
| 368 goto err; | |
| 369 if (pss->trailerField) | |
| 370 { | |
| 371 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) | |
| 372 goto err; | |
| 373 } | |
| 374 else if (BIO_puts(bp, "0xbc (default)") <= 0) | |
| 375 goto err; | |
| 376 BIO_puts(bp, "\n"); | |
| 377 | |
| 378 rv = 1; | |
| 379 | |
| 380 err: | |
| 381 return rv; | |
| 382 | |
| 383 } | |
| 384 | |
| 385 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, | |
| 386 const ASN1_STRING *sig, | |
| 387 int indent, ASN1_PCTX *pctx) | |
| 388 { | |
| 389 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) | |
| 390 { | |
| 391 int rv; | |
| 392 RSA_PSS_PARAMS *pss; | |
| 393 X509_ALGOR *maskHash; | |
| 394 pss = rsa_pss_decode(sigalg, &maskHash); | |
| 395 rv = rsa_pss_param_print(bp, pss, maskHash, indent); | |
| 396 if (pss) | |
| 397 RSA_PSS_PARAMS_free(pss); | |
| 398 if (maskHash) | |
| 399 X509_ALGOR_free(maskHash); | |
| 400 if (!rv) | |
| 401 return 0; | |
| 402 } | |
| 403 else if (!sig && BIO_puts(bp, "\n") <= 0) | |
| 404 return 0; | |
| 405 if (sig) | |
| 406 return X509_signature_dump(bp, sig, indent); | |
| 407 return 1; | |
| 408 } | |
| 409 | |
| 410 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
| 411 { | |
| 412 X509_ALGOR *alg = NULL; | |
| 413 switch (op) | |
| 414 { | |
| 415 | |
| 416 case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
| 417 if (arg1 == 0) | |
| 418 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg); | |
| 419 break; | |
| 420 | |
| 421 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: | |
| 422 if (arg1 == 0) | |
| 423 PKCS7_RECIP_INFO_get0_alg(arg2, &alg); | |
| 424 break; | |
| 425 #ifndef OPENSSL_NO_CMS | |
| 426 case ASN1_PKEY_CTRL_CMS_SIGN: | |
| 427 if (arg1 == 0) | |
| 428 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg); | |
| 429 break; | |
| 430 | |
| 431 case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
| 432 if (arg1 == 0) | |
| 433 CMS_RecipientInfo_ktri_get0_algs(arg2, NULL, NULL, &alg)
; | |
| 434 break; | |
| 435 #endif | |
| 436 | |
| 437 case ASN1_PKEY_CTRL_DEFAULT_MD_NID: | |
| 438 *(int *)arg2 = NID_sha1; | |
| 439 return 1; | |
| 440 | |
| 441 default: | |
| 442 return -2; | |
| 443 | |
| 444 } | |
| 445 | |
| 446 if (alg) | |
| 447 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), | |
| 448 V_ASN1_NULL, 0); | |
| 449 | |
| 450 return 1; | |
| 451 | |
| 452 } | |
| 453 | |
| 454 /* Customised RSA item verification routine. This is called | |
| 455 * when a signature is encountered requiring special handling. We | |
| 456 * currently only handle PSS. | |
| 457 */ | |
| 458 | |
| 459 | |
| 460 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, | |
| 461 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig, | |
| 462 EVP_PKEY *pkey) | |
| 463 { | |
| 464 int rv = -1; | |
| 465 int saltlen; | |
| 466 const EVP_MD *mgf1md = NULL, *md = NULL; | |
| 467 RSA_PSS_PARAMS *pss; | |
| 468 X509_ALGOR *maskHash; | |
| 469 EVP_PKEY_CTX *pkctx; | |
| 470 /* Sanity check: make sure it is PSS */ | |
| 471 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) | |
| 472 { | |
| 473 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); | |
| 474 return -1; | |
| 475 } | |
| 476 /* Decode PSS parameters */ | |
| 477 pss = rsa_pss_decode(sigalg, &maskHash); | |
| 478 | |
| 479 if (pss == NULL) | |
| 480 { | |
| 481 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_PSS_PARAMETERS); | |
| 482 goto err; | |
| 483 } | |
| 484 /* Check mask and lookup mask hash algorithm */ | |
| 485 if (pss->maskGenAlgorithm) | |
| 486 { | |
| 487 if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) != NID_mgf1) | |
| 488 { | |
| 489 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_ALG
ORITHM); | |
| 490 goto err; | |
| 491 } | |
| 492 if (!maskHash) | |
| 493 { | |
| 494 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_PAR
AMETER); | |
| 495 goto err; | |
| 496 } | |
| 497 mgf1md = EVP_get_digestbyobj(maskHash->algorithm); | |
| 498 if (mgf1md == NULL) | |
| 499 { | |
| 500 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_MASK_DIGEST)
; | |
| 501 goto err; | |
| 502 } | |
| 503 } | |
| 504 else | |
| 505 mgf1md = EVP_sha1(); | |
| 506 | |
| 507 if (pss->hashAlgorithm) | |
| 508 { | |
| 509 md = EVP_get_digestbyobj(pss->hashAlgorithm->algorithm); | |
| 510 if (md == NULL) | |
| 511 { | |
| 512 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_PSS_DIGEST); | |
| 513 goto err; | |
| 514 } | |
| 515 } | |
| 516 else | |
| 517 md = EVP_sha1(); | |
| 518 | |
| 519 if (pss->saltLength) | |
| 520 { | |
| 521 saltlen = ASN1_INTEGER_get(pss->saltLength); | |
| 522 | |
| 523 /* Could perform more salt length sanity checks but the main | |
| 524 * RSA routines will trap other invalid values anyway. | |
| 525 */ | |
| 526 if (saltlen < 0) | |
| 527 { | |
| 528 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_SALT_LENGTH)
; | |
| 529 goto err; | |
| 530 } | |
| 531 } | |
| 532 else | |
| 533 saltlen = 20; | |
| 534 | |
| 535 /* low-level routines support only trailer field 0xbc (value 1) | |
| 536 * and PKCS#1 says we should reject any other value anyway. | |
| 537 */ | |
| 538 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) | |
| 539 { | |
| 540 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_TRAILER); | |
| 541 goto err; | |
| 542 } | |
| 543 | |
| 544 /* We have all parameters now set up context */ | |
| 545 | |
| 546 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) | |
| 547 goto err; | |
| 548 | |
| 549 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0) | |
| 550 goto err; | |
| 551 | |
| 552 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0) | |
| 553 goto err; | |
| 554 | |
| 555 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) | |
| 556 goto err; | |
| 557 /* Carry on */ | |
| 558 rv = 2; | |
| 559 | |
| 560 err: | |
| 561 RSA_PSS_PARAMS_free(pss); | |
| 562 if (maskHash) | |
| 563 X509_ALGOR_free(maskHash); | |
| 564 return rv; | |
| 565 } | |
| 566 | |
| 567 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, | |
| 568 X509_ALGOR *alg1, X509_ALGOR *alg2, | |
| 569 ASN1_BIT_STRING *sig) | |
| 570 { | |
| 571 int pad_mode; | |
| 572 EVP_PKEY_CTX *pkctx = ctx->pctx; | |
| 573 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) | |
| 574 return 0; | |
| 575 if (pad_mode == RSA_PKCS1_PADDING) | |
| 576 return 2; | |
| 577 if (pad_mode == RSA_PKCS1_PSS_PADDING) | |
| 578 { | |
| 579 const EVP_MD *sigmd, *mgf1md; | |
| 580 RSA_PSS_PARAMS *pss = NULL; | |
| 581 X509_ALGOR *mgf1alg = NULL; | |
| 582 ASN1_STRING *os1 = NULL, *os2 = NULL; | |
| 583 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); | |
| 584 int saltlen, rv = 0; | |
| 585 sigmd = EVP_MD_CTX_md(ctx); | |
| 586 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) | |
| 587 goto err; | |
| 588 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) | |
| 589 goto err; | |
| 590 if (saltlen == -1) | |
| 591 saltlen = EVP_MD_size(sigmd); | |
| 592 else if (saltlen == -2) | |
| 593 { | |
| 594 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; | |
| 595 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) | |
| 596 saltlen--; | |
| 597 } | |
| 598 pss = RSA_PSS_PARAMS_new(); | |
| 599 if (!pss) | |
| 600 goto err; | |
| 601 if (saltlen != 20) | |
| 602 { | |
| 603 pss->saltLength = ASN1_INTEGER_new(); | |
| 604 if (!pss->saltLength) | |
| 605 goto err; | |
| 606 if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) | |
| 607 goto err; | |
| 608 } | |
| 609 if (EVP_MD_type(sigmd) != NID_sha1) | |
| 610 { | |
| 611 pss->hashAlgorithm = X509_ALGOR_new(); | |
| 612 if (!pss->hashAlgorithm) | |
| 613 goto err; | |
| 614 X509_ALGOR_set_md(pss->hashAlgorithm, sigmd); | |
| 615 } | |
| 616 if (EVP_MD_type(mgf1md) != NID_sha1) | |
| 617 { | |
| 618 ASN1_STRING *stmp = NULL; | |
| 619 /* need to embed algorithm ID inside another */ | |
| 620 mgf1alg = X509_ALGOR_new(); | |
| 621 X509_ALGOR_set_md(mgf1alg, mgf1md); | |
| 622 if (!ASN1_item_pack(mgf1alg, ASN1_ITEM_rptr(X509_ALGOR), | |
| 623 &stmp)) | |
| 624 goto err; | |
| 625 pss->maskGenAlgorithm = X509_ALGOR_new(); | |
| 626 if (!pss->maskGenAlgorithm) | |
| 627 goto err; | |
| 628 X509_ALGOR_set0(pss->maskGenAlgorithm, | |
| 629 OBJ_nid2obj(NID_mgf1), | |
| 630 V_ASN1_SEQUENCE, stmp); | |
| 631 } | |
| 632 /* Finally create string with pss parameter encoding. */ | |
| 633 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os1)) | |
| 634 goto err; | |
| 635 if (alg2) | |
| 636 { | |
| 637 os2 = ASN1_STRING_dup(os1); | |
| 638 if (!os2) | |
| 639 goto err; | |
| 640 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), | |
| 641 V_ASN1_SEQUENCE, os2); | |
| 642 } | |
| 643 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), | |
| 644 V_ASN1_SEQUENCE, os1); | |
| 645 os1 = os2 = NULL; | |
| 646 rv = 3; | |
| 647 err: | |
| 648 if (mgf1alg) | |
| 649 X509_ALGOR_free(mgf1alg); | |
| 650 if (pss) | |
| 651 RSA_PSS_PARAMS_free(pss); | |
| 652 if (os1) | |
| 653 ASN1_STRING_free(os1); | |
| 654 return rv; | |
| 655 | |
| 656 } | |
| 657 return 2; | |
| 658 } | |
| 659 | |
| 660 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = | |
| 661 { | |
| 662 { | |
| 663 EVP_PKEY_RSA, | |
| 664 EVP_PKEY_RSA, | |
| 665 ASN1_PKEY_SIGPARAM_NULL, | |
| 666 | |
| 667 "RSA", | |
| 668 "OpenSSL RSA method", | |
| 669 | |
| 670 rsa_pub_decode, | |
| 671 rsa_pub_encode, | |
| 672 rsa_pub_cmp, | |
| 673 rsa_pub_print, | |
| 674 | |
| 675 rsa_priv_decode, | |
| 676 rsa_priv_encode, | |
| 677 rsa_priv_print, | |
| 678 | |
| 679 int_rsa_size, | |
| 680 rsa_bits, | |
| 681 | |
| 682 0,0,0,0,0,0, | |
| 683 | |
| 684 rsa_sig_print, | |
| 685 int_rsa_free, | |
| 686 rsa_pkey_ctrl, | |
| 687 old_rsa_priv_decode, | |
| 688 old_rsa_priv_encode, | |
| 689 rsa_item_verify, | |
| 690 rsa_item_sign | |
| 691 }, | |
| 692 | |
| 693 { | |
| 694 EVP_PKEY_RSA2, | |
| 695 EVP_PKEY_RSA, | |
| 696 ASN1_PKEY_ALIAS | |
| 697 } | |
| 698 }; | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master