Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/pkcs7/pk7_doit.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include "cryptlib.h" |
| 61 | #include <openssl/rand.h> |
| 62 | #include <openssl/objects.h> |
| 63 | #include <openssl/x509.h> |
| 64 | #include <openssl/x509v3.h> |
| 65 | #include <openssl/err.h> |
| 66 | |
| 67 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
| 68 | void *value); |
| 69 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
| 70 | |
| 71 | static int PKCS7_type_is_other(PKCS7* p7) |
| 72 | { |
| 73 | int isOther=1; |
| 74 | |
| 75 | int nid=OBJ_obj2nid(p7->type); |
| 76 | |
| 77 | switch( nid ) |
| 78 | { |
| 79 | case NID_pkcs7_data: |
| 80 | case NID_pkcs7_signed: |
| 81 | case NID_pkcs7_enveloped: |
| 82 | case NID_pkcs7_signedAndEnveloped: |
| 83 | case NID_pkcs7_digest: |
| 84 | case NID_pkcs7_encrypted: |
| 85 | isOther=0; |
| 86 | break; |
| 87 | default: |
| 88 | isOther=1; |
| 89 | } |
| 90 | |
| 91 | return isOther; |
| 92 | |
| 93 | } |
| 94 | |
| 95 | static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7) |
| 96 | { |
| 97 | if ( PKCS7_type_is_data(p7)) |
| 98 | return p7->d.data; |
| 99 | if ( PKCS7_type_is_other(p7) && p7->d.other |
| 100 | && (p7->d.other->type == V_ASN1_OCTET_STRING)) |
| 101 | return p7->d.other->value.octet_string; |
| 102 | return NULL; |
| 103 | } |
| 104 | |
| 105 | static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg) |
| 106 | { |
| 107 | BIO *btmp; |
| 108 | const EVP_MD *md; |
| 109 | if ((btmp=BIO_new(BIO_f_md())) == NULL) |
| 110 | { |
| 111 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB); |
| 112 | goto err; |
| 113 | } |
| 114 | |
| 115 | md=EVP_get_digestbyobj(alg->algorithm); |
| 116 | if (md == NULL) |
| 117 | { |
| 118 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE); |
| 119 | goto err; |
| 120 | } |
| 121 | |
| 122 | BIO_set_md(btmp,md); |
| 123 | if (*pbio == NULL) |
| 124 | *pbio=btmp; |
| 125 | else if (!BIO_push(*pbio,btmp)) |
| 126 | { |
| 127 | PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB); |
| 128 | goto err; |
| 129 | } |
| 130 | btmp=NULL; |
| 131 | |
| 132 | return 1; |
| 133 | |
| 134 | err: |
| 135 | if (btmp) |
| 136 | BIO_free(btmp); |
| 137 | return 0; |
| 138 | |
| 139 | } |
| 140 | |
| 141 | static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, |
| 142 | unsigned char *key, int keylen) |
| 143 | { |
| 144 | EVP_PKEY_CTX *pctx = NULL; |
| 145 | EVP_PKEY *pkey = NULL; |
| 146 | unsigned char *ek = NULL; |
| 147 | int ret = 0; |
| 148 | size_t eklen; |
| 149 | |
| 150 | pkey = X509_get_pubkey(ri->cert); |
| 151 | |
| 152 | if (!pkey) |
| 153 | return 0; |
| 154 | |
| 155 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
| 156 | if (!pctx) |
| 157 | return 0; |
| 158 | |
| 159 | if (EVP_PKEY_encrypt_init(pctx) <= 0) |
| 160 | goto err; |
| 161 | |
| 162 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, |
| 163 | EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) |
| 164 | { |
| 165 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR); |
| 166 | goto err; |
| 167 | } |
| 168 | |
| 169 | if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0) |
| 170 | goto err; |
| 171 | |
| 172 | ek = OPENSSL_malloc(eklen); |
| 173 | |
| 174 | if (ek == NULL) |
| 175 | { |
| 176 | PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE); |
| 177 | goto err; |
| 178 | } |
| 179 | |
| 180 | if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0) |
| 181 | goto err; |
| 182 | |
| 183 | ASN1_STRING_set0(ri->enc_key, ek, eklen); |
| 184 | ek = NULL; |
| 185 | |
| 186 | ret = 1; |
| 187 | |
| 188 | err: |
| 189 | if (pkey) |
| 190 | EVP_PKEY_free(pkey); |
| 191 | if (pctx) |
| 192 | EVP_PKEY_CTX_free(pctx); |
| 193 | if (ek) |
| 194 | OPENSSL_free(ek); |
| 195 | return ret; |
| 196 | |
| 197 | } |
| 198 | |
| 199 | |
| 200 | static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
| 201 | PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
| 202 | { |
| 203 | EVP_PKEY_CTX *pctx = NULL; |
| 204 | unsigned char *ek = NULL; |
| 205 | size_t eklen; |
| 206 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 207 | int ret = 0; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 208 | |
| 209 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
| 210 | if (!pctx) |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 211 | return 0; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 212 | |
| 213 | if (EVP_PKEY_decrypt_init(pctx) <= 0) |
| 214 | goto err; |
| 215 | |
| 216 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, |
| 217 | EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) |
| 218 | { |
| 219 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); |
| 220 | goto err; |
| 221 | } |
| 222 | |
| 223 | if (EVP_PKEY_decrypt(pctx, NULL, &eklen, |
| 224 | ri->enc_key->data, ri->enc_key->length) <= 0) |
| 225 | goto err; |
| 226 | |
| 227 | ek = OPENSSL_malloc(eklen); |
| 228 | |
| 229 | if (ek == NULL) |
| 230 | { |
| 231 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); |
| 232 | goto err; |
| 233 | } |
| 234 | |
| 235 | if (EVP_PKEY_decrypt(pctx, ek, &eklen, |
| 236 | ri->enc_key->data, ri->enc_key->length) <= 0) |
| 237 | { |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 238 | PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); |
| 239 | goto err; |
| 240 | } |
| 241 | |
| 242 | ret = 1; |
| 243 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 244 | *pek = ek; |
| 245 | *peklen = eklen; |
| 246 | |
| 247 | err: |
| 248 | if (pctx) |
| 249 | EVP_PKEY_CTX_free(pctx); |
| 250 | if (!ret && ek) |
| 251 | OPENSSL_free(ek); |
| 252 | |
| 253 | return ret; |
| 254 | } |
| 255 | |
| 256 | BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
| 257 | { |
| 258 | int i; |
| 259 | BIO *out=NULL,*btmp=NULL; |
| 260 | X509_ALGOR *xa = NULL; |
| 261 | const EVP_CIPHER *evp_cipher=NULL; |
| 262 | STACK_OF(X509_ALGOR) *md_sk=NULL; |
| 263 | STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL; |
| 264 | X509_ALGOR *xalg=NULL; |
| 265 | PKCS7_RECIP_INFO *ri=NULL; |
| 266 | ASN1_OCTET_STRING *os=NULL; |
| 267 | |
| 268 | i=OBJ_obj2nid(p7->type); |
| 269 | p7->state=PKCS7_S_HEADER; |
| 270 | |
| 271 | switch (i) |
| 272 | { |
| 273 | case NID_pkcs7_signed: |
| 274 | md_sk=p7->d.sign->md_algs; |
| 275 | os = PKCS7_get_octet_string(p7->d.sign->contents); |
| 276 | break; |
| 277 | case NID_pkcs7_signedAndEnveloped: |
| 278 | rsk=p7->d.signed_and_enveloped->recipientinfo; |
| 279 | md_sk=p7->d.signed_and_enveloped->md_algs; |
| 280 | xalg=p7->d.signed_and_enveloped->enc_data->algorithm; |
| 281 | evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher; |
| 282 | if (evp_cipher == NULL) |
| 283 | { |
| 284 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, |
| 285 | PKCS7_R_CIPHER_NOT_INITIALIZED); |
| 286 | goto err; |
| 287 | } |
| 288 | break; |
| 289 | case NID_pkcs7_enveloped: |
| 290 | rsk=p7->d.enveloped->recipientinfo; |
| 291 | xalg=p7->d.enveloped->enc_data->algorithm; |
| 292 | evp_cipher=p7->d.enveloped->enc_data->cipher; |
| 293 | if (evp_cipher == NULL) |
| 294 | { |
| 295 | PKCS7err(PKCS7_F_PKCS7_DATAINIT, |
| 296 | PKCS7_R_CIPHER_NOT_INITIALIZED); |
| 297 | goto err; |
| 298 | } |
| 299 | break; |
| 300 | case NID_pkcs7_digest: |
| 301 | xa = p7->d.digest->md; |
| 302 | os = PKCS7_get_octet_string(p7->d.digest->contents); |
| 303 | break; |
| 304 | case NID_pkcs7_data: |
| 305 | break; |
| 306 | default: |
| 307 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
| 308 | goto err; |
| 309 | } |
| 310 | |
| 311 | for (i=0; i<sk_X509_ALGOR_num(md_sk); i++) |
| 312 | if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) |
| 313 | goto err; |
| 314 | |
| 315 | if (xa && !PKCS7_bio_add_digest(&out, xa)) |
| 316 | goto err; |
| 317 | |
| 318 | if (evp_cipher != NULL) |
| 319 | { |
| 320 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
| 321 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
| 322 | int keylen,ivlen; |
| 323 | EVP_CIPHER_CTX *ctx; |
| 324 | |
| 325 | if ((btmp=BIO_new(BIO_f_cipher())) == NULL) |
| 326 | { |
| 327 | PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB); |
| 328 | goto err; |
| 329 | } |
| 330 | BIO_get_cipher_ctx(btmp, &ctx); |
| 331 | keylen=EVP_CIPHER_key_length(evp_cipher); |
| 332 | ivlen=EVP_CIPHER_iv_length(evp_cipher); |
| 333 | xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); |
| 334 | if (ivlen > 0) |
| 335 | if (RAND_pseudo_bytes(iv,ivlen) <= 0) |
| 336 | goto err; |
| 337 | if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0) |
| 338 | goto err; |
| 339 | if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) |
| 340 | goto err; |
| 341 | if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) |
| 342 | goto err; |
| 343 | |
| 344 | if (ivlen > 0) { |
| 345 | if (xalg->parameter == NULL) { |
| 346 | xalg->parameter = ASN1_TYPE_new(); |
| 347 | if (xalg->parameter == NULL) |
| 348 | goto err; |
| 349 | } |
| 350 | if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) |
| 351 | goto err; |
| 352 | } |
| 353 | |
| 354 | /* Lets do the pub key stuff :-) */ |
| 355 | for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) |
| 356 | { |
| 357 | ri=sk_PKCS7_RECIP_INFO_value(rsk,i); |
| 358 | if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) |
| 359 | goto err; |
| 360 | } |
| 361 | OPENSSL_cleanse(key, keylen); |
| 362 | |
| 363 | if (out == NULL) |
| 364 | out=btmp; |
| 365 | else |
| 366 | BIO_push(out,btmp); |
| 367 | btmp=NULL; |
| 368 | } |
| 369 | |
| 370 | if (bio == NULL) |
| 371 | { |
| 372 | if (PKCS7_is_detached(p7)) |
| 373 | bio=BIO_new(BIO_s_null()); |
| 374 | else if (os && os->length > 0) |
| 375 | bio = BIO_new_mem_buf(os->data, os->length); |
| 376 | if(bio == NULL) |
| 377 | { |
| 378 | bio=BIO_new(BIO_s_mem()); |
| 379 | if (bio == NULL) |
| 380 | goto err; |
| 381 | BIO_set_mem_eof_return(bio,0); |
| 382 | } |
| 383 | } |
| 384 | if (out) |
| 385 | BIO_push(out,bio); |
| 386 | else |
| 387 | out = bio; |
| 388 | bio=NULL; |
| 389 | if (0) |
| 390 | { |
| 391 | err: |
| 392 | if (out != NULL) |
| 393 | BIO_free_all(out); |
| 394 | if (btmp != NULL) |
| 395 | BIO_free_all(btmp); |
| 396 | out=NULL; |
| 397 | } |
| 398 | return(out); |
| 399 | } |
| 400 | |
| 401 | static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
| 402 | { |
| 403 | int ret; |
| 404 | ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, |
| 405 | pcert->cert_info->issuer); |
| 406 | if (ret) |
| 407 | return ret; |
| 408 | return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, |
| 409 | ri->issuer_and_serial->serial); |
| 410 | } |
| 411 | |
| 412 | /* int */ |
| 413 | BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
| 414 | { |
| 415 | int i,j; |
| 416 | BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL; |
| 417 | X509_ALGOR *xa; |
| 418 | ASN1_OCTET_STRING *data_body=NULL; |
| 419 | const EVP_MD *evp_md; |
| 420 | const EVP_CIPHER *evp_cipher=NULL; |
| 421 | EVP_CIPHER_CTX *evp_ctx=NULL; |
| 422 | X509_ALGOR *enc_alg=NULL; |
| 423 | STACK_OF(X509_ALGOR) *md_sk=NULL; |
| 424 | STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL; |
| 425 | PKCS7_RECIP_INFO *ri=NULL; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 426 | |
| 427 | i=OBJ_obj2nid(p7->type); |
| 428 | p7->state=PKCS7_S_HEADER; |
| 429 | |
| 430 | switch (i) |
| 431 | { |
| 432 | case NID_pkcs7_signed: |
| 433 | data_body=PKCS7_get_octet_string(p7->d.sign->contents); |
| 434 | md_sk=p7->d.sign->md_algs; |
| 435 | break; |
| 436 | case NID_pkcs7_signedAndEnveloped: |
| 437 | rsk=p7->d.signed_and_enveloped->recipientinfo; |
| 438 | md_sk=p7->d.signed_and_enveloped->md_algs; |
| 439 | data_body=p7->d.signed_and_enveloped->enc_data->enc_data; |
| 440 | enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm; |
| 441 | evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm); |
| 442 | if (evp_cipher == NULL) |
| 443 | { |
| 444 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
| 445 | goto err; |
| 446 | } |
| 447 | break; |
| 448 | case NID_pkcs7_enveloped: |
| 449 | rsk=p7->d.enveloped->recipientinfo; |
| 450 | enc_alg=p7->d.enveloped->enc_data->algorithm; |
| 451 | data_body=p7->d.enveloped->enc_data->enc_data; |
| 452 | evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm); |
| 453 | if (evp_cipher == NULL) |
| 454 | { |
| 455 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
| 456 | goto err; |
| 457 | } |
| 458 | break; |
| 459 | default: |
| 460 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
| 461 | goto err; |
| 462 | } |
| 463 | |
| 464 | /* We will be checking the signature */ |
| 465 | if (md_sk != NULL) |
| 466 | { |
| 467 | for (i=0; i<sk_X509_ALGOR_num(md_sk); i++) |
| 468 | { |
| 469 | xa=sk_X509_ALGOR_value(md_sk,i); |
| 470 | if ((btmp=BIO_new(BIO_f_md())) == NULL) |
| 471 | { |
| 472 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB); |
| 473 | goto err; |
| 474 | } |
| 475 | |
| 476 | j=OBJ_obj2nid(xa->algorithm); |
| 477 | evp_md=EVP_get_digestbynid(j); |
| 478 | if (evp_md == NULL) |
| 479 | { |
| 480 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE); |
| 481 | goto err; |
| 482 | } |
| 483 | |
| 484 | BIO_set_md(btmp,evp_md); |
| 485 | if (out == NULL) |
| 486 | out=btmp; |
| 487 | else |
| 488 | BIO_push(out,btmp); |
| 489 | btmp=NULL; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | if (evp_cipher != NULL) |
| 494 | { |
| 495 | #if 0 |
| 496 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
| 497 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
| 498 | unsigned char *p; |
| 499 | int keylen,ivlen; |
| 500 | int max; |
| 501 | X509_OBJECT ret; |
| 502 | #endif |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 503 | unsigned char *ek = NULL; |
| 504 | int eklen; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 505 | |
| 506 | if ((etmp=BIO_new(BIO_f_cipher())) == NULL) |
| 507 | { |
| 508 | PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB); |
| 509 | goto err; |
| 510 | } |
| 511 | |
| 512 | /* It was encrypted, we need to decrypt the secret key |
| 513 | * with the private key */ |
| 514 | |
| 515 | /* Find the recipientInfo which matches the passed certificate |
| 516 | * (if any) |
| 517 | */ |
| 518 | |
| 519 | if (pcert) |
| 520 | { |
| 521 | for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) |
| 522 | { |
| 523 | ri=sk_PKCS7_RECIP_INFO_value(rsk,i); |
| 524 | if (!pkcs7_cmp_ri(ri, pcert)) |
| 525 | break; |
| 526 | ri=NULL; |
| 527 | } |
| 528 | if (ri == NULL) |
| 529 | { |
| 530 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
| 531 | PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); |
| 532 | goto err; |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | /* If we haven't got a certificate try each ri in turn */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 537 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 538 | if (pcert == NULL) |
| 539 | { |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 540 | for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) |
| 541 | { |
| 542 | ri=sk_PKCS7_RECIP_INFO_value(rsk,i); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 543 | if (pkcs7_decrypt_rinfo(&ek, &eklen, |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 544 | ri, pkey) > 0) |
| 545 | break; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 546 | ERR_clear_error(); |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 547 | ri = NULL; |
| 548 | } |
| 549 | if (ri == NULL) |
| 550 | { |
| 551 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
| 552 | PKCS7_R_NO_RECIPIENT_MATCHES_KEY); |
| 553 | goto err; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 554 | } |
| 555 | } |
| 556 | else |
| 557 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 558 | if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) <= 0) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 559 | goto err; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | evp_ctx=NULL; |
| 563 | BIO_get_cipher_ctx(etmp,&evp_ctx); |
| 564 | if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0) |
| 565 | goto err; |
| 566 | if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0) |
| 567 | goto err; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 568 | |
| 569 | if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { |
| 570 | /* Some S/MIME clients don't use the same key |
| 571 | * and effective key length. The key length is |
| 572 | * determined by the size of the decrypted RSA key. |
| 573 | */ |
| 574 | if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) |
| 575 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 576 | PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
| 577 | PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH); |
| 578 | goto err; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 579 | } |
| 580 | } |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 581 | if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0) |
| 582 | goto err; |
| 583 | |
| 584 | if (ek) |
| 585 | { |
| 586 | OPENSSL_cleanse(ek,eklen); |
| 587 | OPENSSL_free(ek); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 588 | } |
| 589 | |
| 590 | if (out == NULL) |
| 591 | out=etmp; |
| 592 | else |
| 593 | BIO_push(out,etmp); |
| 594 | etmp=NULL; |
| 595 | } |
| 596 | |
| 597 | #if 1 |
| 598 | if (PKCS7_is_detached(p7) || (in_bio != NULL)) |
| 599 | { |
| 600 | bio=in_bio; |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | #if 0 |
| 605 | bio=BIO_new(BIO_s_mem()); |
| 606 | /* We need to set this so that when we have read all |
| 607 | * the data, the encrypt BIO, if present, will read |
| 608 | * EOF and encode the last few bytes */ |
| 609 | BIO_set_mem_eof_return(bio,0); |
| 610 | |
| 611 | if (data_body->length > 0) |
| 612 | BIO_write(bio,(char *)data_body->data,data_body->length); |
| 613 | #else |
| 614 | if (data_body->length > 0) |
| 615 | bio = BIO_new_mem_buf(data_body->data,data_body->length); |
| 616 | else { |
| 617 | bio=BIO_new(BIO_s_mem()); |
| 618 | BIO_set_mem_eof_return(bio,0); |
| 619 | } |
| 620 | if (bio == NULL) |
| 621 | goto err; |
| 622 | #endif |
| 623 | } |
| 624 | BIO_push(out,bio); |
| 625 | bio=NULL; |
| 626 | #endif |
| 627 | if (0) |
| 628 | { |
| 629 | err: |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 630 | if (out != NULL) BIO_free_all(out); |
| 631 | if (btmp != NULL) BIO_free_all(btmp); |
| 632 | if (etmp != NULL) BIO_free_all(etmp); |
| 633 | if (bio != NULL) BIO_free_all(bio); |
| 634 | out=NULL; |
| 635 | } |
| 636 | return(out); |
| 637 | } |
| 638 | |
| 639 | static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
| 640 | { |
| 641 | for (;;) |
| 642 | { |
| 643 | bio=BIO_find_type(bio,BIO_TYPE_MD); |
| 644 | if (bio == NULL) |
| 645 | { |
| 646 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
| 647 | return NULL; |
| 648 | } |
| 649 | BIO_get_md_ctx(bio,pmd); |
| 650 | if (*pmd == NULL) |
| 651 | { |
| 652 | PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR); |
| 653 | return NULL; |
| 654 | } |
| 655 | if (EVP_MD_CTX_type(*pmd) == nid) |
| 656 | return bio; |
| 657 | bio=BIO_next(bio); |
| 658 | } |
| 659 | return NULL; |
| 660 | } |
| 661 | |
| 662 | static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
| 663 | { |
| 664 | unsigned char md_data[EVP_MAX_MD_SIZE]; |
| 665 | unsigned int md_len; |
| 666 | |
| 667 | /* Add signing time if not already present */ |
| 668 | if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) |
| 669 | { |
| 670 | if (!PKCS7_add0_attrib_signing_time(si, NULL)) |
| 671 | { |
| 672 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, |
| 673 | ERR_R_MALLOC_FAILURE); |
| 674 | return 0; |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | /* Add digest */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 679 | EVP_DigestFinal_ex(mctx, md_data,&md_len); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 680 | if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) |
| 681 | { |
| 682 | PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | /* Now sign the attributes */ |
| 687 | if (!PKCS7_SIGNER_INFO_sign(si)) |
| 688 | return 0; |
| 689 | |
| 690 | return 1; |
| 691 | } |
| 692 | |
| 693 | |
| 694 | int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
| 695 | { |
| 696 | int ret=0; |
| 697 | int i,j; |
| 698 | BIO *btmp; |
| 699 | PKCS7_SIGNER_INFO *si; |
| 700 | EVP_MD_CTX *mdc,ctx_tmp; |
| 701 | STACK_OF(X509_ATTRIBUTE) *sk; |
| 702 | STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL; |
| 703 | ASN1_OCTET_STRING *os=NULL; |
| 704 | |
| 705 | EVP_MD_CTX_init(&ctx_tmp); |
| 706 | i=OBJ_obj2nid(p7->type); |
| 707 | p7->state=PKCS7_S_HEADER; |
| 708 | |
| 709 | switch (i) |
| 710 | { |
| 711 | case NID_pkcs7_data: |
| 712 | os = p7->d.data; |
| 713 | break; |
| 714 | case NID_pkcs7_signedAndEnveloped: |
| 715 | /* XXXXXXXXXXXXXXXX */ |
| 716 | si_sk=p7->d.signed_and_enveloped->signer_info; |
| 717 | os = p7->d.signed_and_enveloped->enc_data->enc_data; |
| 718 | if (!os) |
| 719 | { |
| 720 | os=M_ASN1_OCTET_STRING_new(); |
| 721 | if (!os) |
| 722 | { |
| 723 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE); |
| 724 | goto err; |
| 725 | } |
| 726 | p7->d.signed_and_enveloped->enc_data->enc_data=os; |
| 727 | } |
| 728 | break; |
| 729 | case NID_pkcs7_enveloped: |
| 730 | /* XXXXXXXXXXXXXXXX */ |
| 731 | os = p7->d.enveloped->enc_data->enc_data; |
| 732 | if (!os) |
| 733 | { |
| 734 | os=M_ASN1_OCTET_STRING_new(); |
| 735 | if (!os) |
| 736 | { |
| 737 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE); |
| 738 | goto err; |
| 739 | } |
| 740 | p7->d.enveloped->enc_data->enc_data=os; |
| 741 | } |
| 742 | break; |
| 743 | case NID_pkcs7_signed: |
| 744 | si_sk=p7->d.sign->signer_info; |
| 745 | os=PKCS7_get_octet_string(p7->d.sign->contents); |
| 746 | /* If detached data then the content is excluded */ |
| 747 | if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { |
| 748 | M_ASN1_OCTET_STRING_free(os); |
| 749 | p7->d.sign->contents->d.data = NULL; |
| 750 | } |
| 751 | break; |
| 752 | |
| 753 | case NID_pkcs7_digest: |
| 754 | os=PKCS7_get_octet_string(p7->d.digest->contents); |
| 755 | /* If detached data then the content is excluded */ |
| 756 | if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) |
| 757 | { |
| 758 | M_ASN1_OCTET_STRING_free(os); |
| 759 | p7->d.digest->contents->d.data = NULL; |
| 760 | } |
| 761 | break; |
| 762 | |
| 763 | default: |
| 764 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
| 765 | goto err; |
| 766 | } |
| 767 | |
| 768 | if (si_sk != NULL) |
| 769 | { |
| 770 | for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++) |
| 771 | { |
| 772 | si=sk_PKCS7_SIGNER_INFO_value(si_sk,i); |
| 773 | if (si->pkey == NULL) |
| 774 | continue; |
| 775 | |
| 776 | j = OBJ_obj2nid(si->digest_alg->algorithm); |
| 777 | |
| 778 | btmp=bio; |
| 779 | |
| 780 | btmp = PKCS7_find_digest(&mdc, btmp, j); |
| 781 | |
| 782 | if (btmp == NULL) |
| 783 | goto err; |
| 784 | |
| 785 | /* We now have the EVP_MD_CTX, lets do the |
| 786 | * signing. */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 787 | EVP_MD_CTX_copy_ex(&ctx_tmp,mdc); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 788 | |
| 789 | sk=si->auth_attr; |
| 790 | |
| 791 | /* If there are attributes, we add the digest |
| 792 | * attribute and only sign the attributes */ |
| 793 | if (sk_X509_ATTRIBUTE_num(sk) > 0) |
| 794 | { |
| 795 | if (!do_pkcs7_signed_attrib(si, &ctx_tmp)) |
| 796 | goto err; |
| 797 | } |
| 798 | else |
| 799 | { |
| 800 | unsigned char *abuf = NULL; |
| 801 | unsigned int abuflen; |
| 802 | abuflen = EVP_PKEY_size(si->pkey); |
| 803 | abuf = OPENSSL_malloc(abuflen); |
| 804 | if (!abuf) |
| 805 | goto err; |
| 806 | |
| 807 | if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, |
| 808 | si->pkey)) |
| 809 | { |
| 810 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL, |
| 811 | ERR_R_EVP_LIB); |
| 812 | goto err; |
| 813 | } |
| 814 | ASN1_STRING_set0(si->enc_digest, abuf, abuflen); |
| 815 | } |
| 816 | } |
| 817 | } |
| 818 | else if (i == NID_pkcs7_digest) |
| 819 | { |
| 820 | unsigned char md_data[EVP_MAX_MD_SIZE]; |
| 821 | unsigned int md_len; |
| 822 | if (!PKCS7_find_digest(&mdc, bio, |
| 823 | OBJ_obj2nid(p7->d.digest->md->algorithm))) |
| 824 | goto err; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 825 | EVP_DigestFinal_ex(mdc,md_data,&md_len); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 826 | M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); |
| 827 | } |
| 828 | |
| 829 | if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF)) |
| 830 | { |
| 831 | char *cont; |
| 832 | long contlen; |
| 833 | btmp=BIO_find_type(bio,BIO_TYPE_MEM); |
| 834 | if (btmp == NULL) |
| 835 | { |
| 836 | PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO); |
| 837 | goto err; |
| 838 | } |
| 839 | contlen = BIO_get_mem_data(btmp, &cont); |
| 840 | /* Mark the BIO read only then we can use its copy of the data |
| 841 | * instead of making an extra copy. |
| 842 | */ |
| 843 | BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); |
| 844 | BIO_set_mem_eof_return(btmp, 0); |
| 845 | ASN1_STRING_set0(os, (unsigned char *)cont, contlen); |
| 846 | } |
| 847 | ret=1; |
| 848 | err: |
| 849 | EVP_MD_CTX_cleanup(&ctx_tmp); |
| 850 | return(ret); |
| 851 | } |
| 852 | |
| 853 | int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
| 854 | { |
| 855 | EVP_MD_CTX mctx; |
| 856 | EVP_PKEY_CTX *pctx; |
| 857 | unsigned char *abuf = NULL; |
| 858 | int alen; |
| 859 | size_t siglen; |
| 860 | const EVP_MD *md = NULL; |
| 861 | |
| 862 | md = EVP_get_digestbyobj(si->digest_alg->algorithm); |
| 863 | if (md == NULL) |
| 864 | return 0; |
| 865 | |
| 866 | EVP_MD_CTX_init(&mctx); |
| 867 | if (EVP_DigestSignInit(&mctx, &pctx, md,NULL, si->pkey) <= 0) |
| 868 | goto err; |
| 869 | |
| 870 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, |
| 871 | EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) |
| 872 | { |
| 873 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); |
| 874 | goto err; |
| 875 | } |
| 876 | |
| 877 | alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr,&abuf, |
| 878 | ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); |
| 879 | if(!abuf) |
| 880 | goto err; |
| 881 | if (EVP_DigestSignUpdate(&mctx,abuf,alen) <= 0) |
| 882 | goto err; |
| 883 | OPENSSL_free(abuf); |
| 884 | if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0) |
| 885 | goto err; |
| 886 | abuf = OPENSSL_malloc(siglen); |
| 887 | if(!abuf) |
| 888 | goto err; |
| 889 | if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0) |
| 890 | goto err; |
| 891 | |
| 892 | if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, |
| 893 | EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) |
| 894 | { |
| 895 | PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); |
| 896 | goto err; |
| 897 | } |
| 898 | |
| 899 | EVP_MD_CTX_cleanup(&mctx); |
| 900 | |
| 901 | ASN1_STRING_set0(si->enc_digest, abuf, siglen); |
| 902 | |
| 903 | return 1; |
| 904 | |
| 905 | err: |
| 906 | if (abuf) |
| 907 | OPENSSL_free(abuf); |
| 908 | EVP_MD_CTX_cleanup(&mctx); |
| 909 | return 0; |
| 910 | |
| 911 | } |
| 912 | |
| 913 | int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
| 914 | PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
| 915 | { |
| 916 | PKCS7_ISSUER_AND_SERIAL *ias; |
| 917 | int ret=0,i; |
| 918 | STACK_OF(X509) *cert; |
| 919 | X509 *x509; |
| 920 | |
| 921 | if (PKCS7_type_is_signed(p7)) |
| 922 | { |
| 923 | cert=p7->d.sign->cert; |
| 924 | } |
| 925 | else if (PKCS7_type_is_signedAndEnveloped(p7)) |
| 926 | { |
| 927 | cert=p7->d.signed_and_enveloped->cert; |
| 928 | } |
| 929 | else |
| 930 | { |
| 931 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE); |
| 932 | goto err; |
| 933 | } |
| 934 | /* XXXXXXXXXXXXXXXXXXXXXXX */ |
| 935 | ias=si->issuer_and_serial; |
| 936 | |
| 937 | x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial); |
| 938 | |
| 939 | /* were we able to find the cert in passed to us */ |
| 940 | if (x509 == NULL) |
| 941 | { |
| 942 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); |
| 943 | goto err; |
| 944 | } |
| 945 | |
| 946 | /* Lets verify */ |
| 947 | if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert)) |
| 948 | { |
| 949 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB); |
| 950 | goto err; |
| 951 | } |
| 952 | X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); |
| 953 | i=X509_verify_cert(ctx); |
| 954 | if (i <= 0) |
| 955 | { |
| 956 | PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB); |
| 957 | X509_STORE_CTX_cleanup(ctx); |
| 958 | goto err; |
| 959 | } |
| 960 | X509_STORE_CTX_cleanup(ctx); |
| 961 | |
| 962 | return PKCS7_signatureVerify(bio, p7, si, x509); |
| 963 | err: |
| 964 | return ret; |
| 965 | } |
| 966 | |
| 967 | int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, |
| 968 | X509 *x509) |
| 969 | { |
| 970 | ASN1_OCTET_STRING *os; |
| 971 | EVP_MD_CTX mdc_tmp,*mdc; |
| 972 | int ret=0,i; |
| 973 | int md_type; |
| 974 | STACK_OF(X509_ATTRIBUTE) *sk; |
| 975 | BIO *btmp; |
| 976 | EVP_PKEY *pkey; |
| 977 | |
| 978 | EVP_MD_CTX_init(&mdc_tmp); |
| 979 | |
| 980 | if (!PKCS7_type_is_signed(p7) && |
| 981 | !PKCS7_type_is_signedAndEnveloped(p7)) { |
| 982 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
| 983 | PKCS7_R_WRONG_PKCS7_TYPE); |
| 984 | goto err; |
| 985 | } |
| 986 | |
| 987 | md_type=OBJ_obj2nid(si->digest_alg->algorithm); |
| 988 | |
| 989 | btmp=bio; |
| 990 | for (;;) |
| 991 | { |
| 992 | if ((btmp == NULL) || |
| 993 | ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL)) |
| 994 | { |
| 995 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
| 996 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
| 997 | goto err; |
| 998 | } |
| 999 | BIO_get_md_ctx(btmp,&mdc); |
| 1000 | if (mdc == NULL) |
| 1001 | { |
| 1002 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
| 1003 | ERR_R_INTERNAL_ERROR); |
| 1004 | goto err; |
| 1005 | } |
| 1006 | if (EVP_MD_CTX_type(mdc) == md_type) |
| 1007 | break; |
| 1008 | /* Workaround for some broken clients that put the signature |
| 1009 | * OID instead of the digest OID in digest_alg->algorithm |
| 1010 | */ |
| 1011 | if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) |
| 1012 | break; |
| 1013 | btmp=BIO_next(btmp); |
| 1014 | } |
| 1015 | |
| 1016 | /* mdc is the digest ctx that we want, unless there are attributes, |
| 1017 | * in which case the digest is the signed attributes */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 1018 | EVP_MD_CTX_copy_ex(&mdc_tmp,mdc); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1019 | |
| 1020 | sk=si->auth_attr; |
| 1021 | if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) |
| 1022 | { |
| 1023 | unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; |
| 1024 | unsigned int md_len; |
| 1025 | int alen; |
| 1026 | ASN1_OCTET_STRING *message_digest; |
| 1027 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 1028 | EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1029 | message_digest=PKCS7_digest_from_attributes(sk); |
| 1030 | if (!message_digest) |
| 1031 | { |
| 1032 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
| 1033 | PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
| 1034 | goto err; |
| 1035 | } |
| 1036 | if ((message_digest->length != (int)md_len) || |
| 1037 | (memcmp(message_digest->data,md_dat,md_len))) |
| 1038 | { |
| 1039 | #if 0 |
| 1040 | { |
| 1041 | int ii; |
| 1042 | for (ii=0; ii<message_digest->length; ii++) |
| 1043 | printf("%02X",message_digest->data[ii]); printf(" sent\n"); |
| 1044 | for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n"); |
| 1045 | } |
| 1046 | #endif |
| 1047 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
| 1048 | PKCS7_R_DIGEST_FAILURE); |
| 1049 | ret= -1; |
| 1050 | goto err; |
| 1051 | } |
| 1052 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 1053 | EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1054 | |
| 1055 | alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, |
| 1056 | ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); |
| 1057 | if (alen <= 0) |
| 1058 | { |
| 1059 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,ERR_R_ASN1_LIB); |
| 1060 | ret = -1; |
| 1061 | goto err; |
| 1062 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 1063 | EVP_VerifyUpdate(&mdc_tmp, abuf, alen); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1064 | |
| 1065 | OPENSSL_free(abuf); |
| 1066 | } |
| 1067 | |
| 1068 | os=si->enc_digest; |
| 1069 | pkey = X509_get_pubkey(x509); |
| 1070 | if (!pkey) |
| 1071 | { |
| 1072 | ret = -1; |
| 1073 | goto err; |
| 1074 | } |
| 1075 | |
| 1076 | i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey); |
| 1077 | EVP_PKEY_free(pkey); |
| 1078 | if (i <= 0) |
| 1079 | { |
| 1080 | PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
| 1081 | PKCS7_R_SIGNATURE_FAILURE); |
| 1082 | ret= -1; |
| 1083 | goto err; |
| 1084 | } |
| 1085 | else |
| 1086 | ret=1; |
| 1087 | err: |
| 1088 | EVP_MD_CTX_cleanup(&mdc_tmp); |
| 1089 | return(ret); |
| 1090 | } |
| 1091 | |
| 1092 | PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
| 1093 | { |
| 1094 | STACK_OF(PKCS7_RECIP_INFO) *rsk; |
| 1095 | PKCS7_RECIP_INFO *ri; |
| 1096 | int i; |
| 1097 | |
| 1098 | i=OBJ_obj2nid(p7->type); |
| 1099 | if (i != NID_pkcs7_signedAndEnveloped) |
| 1100 | return NULL; |
| 1101 | if (p7->d.signed_and_enveloped == NULL) |
| 1102 | return NULL; |
| 1103 | rsk=p7->d.signed_and_enveloped->recipientinfo; |
| 1104 | if (rsk == NULL) |
| 1105 | return NULL; |
| 1106 | ri=sk_PKCS7_RECIP_INFO_value(rsk,0); |
| 1107 | if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL); |
| 1108 | ri=sk_PKCS7_RECIP_INFO_value(rsk,idx); |
| 1109 | return(ri->issuer_and_serial); |
| 1110 | } |
| 1111 | |
| 1112 | ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
| 1113 | { |
| 1114 | return(get_attribute(si->auth_attr,nid)); |
| 1115 | } |
| 1116 | |
| 1117 | ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
| 1118 | { |
| 1119 | return(get_attribute(si->unauth_attr,nid)); |
| 1120 | } |
| 1121 | |
| 1122 | static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
| 1123 | { |
| 1124 | int i; |
| 1125 | X509_ATTRIBUTE *xa; |
| 1126 | ASN1_OBJECT *o; |
| 1127 | |
| 1128 | o=OBJ_nid2obj(nid); |
| 1129 | if (!o || !sk) return(NULL); |
| 1130 | for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++) |
| 1131 | { |
| 1132 | xa=sk_X509_ATTRIBUTE_value(sk,i); |
| 1133 | if (OBJ_cmp(xa->object,o) == 0) |
| 1134 | { |
| 1135 | if (!xa->single && sk_ASN1_TYPE_num(xa->value.set)) |
| 1136 | return(sk_ASN1_TYPE_value(xa->value.set,0)); |
| 1137 | else |
| 1138 | return(NULL); |
| 1139 | } |
| 1140 | } |
| 1141 | return(NULL); |
| 1142 | } |
| 1143 | |
| 1144 | ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
| 1145 | { |
| 1146 | ASN1_TYPE *astype; |
| 1147 | if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL; |
| 1148 | return astype->value.octet_string; |
| 1149 | } |
| 1150 | |
| 1151 | int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
| 1152 | STACK_OF(X509_ATTRIBUTE) *sk) |
| 1153 | { |
| 1154 | int i; |
| 1155 | |
| 1156 | if (p7si->auth_attr != NULL) |
| 1157 | sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free); |
| 1158 | p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk); |
| 1159 | if (p7si->auth_attr == NULL) |
| 1160 | return 0; |
| 1161 | for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++) |
| 1162 | { |
| 1163 | if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i, |
| 1164 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i)))) |
| 1165 | == NULL) |
| 1166 | return(0); |
| 1167 | } |
| 1168 | return(1); |
| 1169 | } |
| 1170 | |
| 1171 | int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk) |
| 1172 | { |
| 1173 | int i; |
| 1174 | |
| 1175 | if (p7si->unauth_attr != NULL) |
| 1176 | sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, |
| 1177 | X509_ATTRIBUTE_free); |
| 1178 | p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk); |
| 1179 | if (p7si->unauth_attr == NULL) |
| 1180 | return 0; |
| 1181 | for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++) |
| 1182 | { |
| 1183 | if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i, |
| 1184 | X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i)))) |
| 1185 | == NULL) |
| 1186 | return(0); |
| 1187 | } |
| 1188 | return(1); |
| 1189 | } |
| 1190 | |
| 1191 | int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
| 1192 | void *value) |
| 1193 | { |
| 1194 | return(add_attribute(&(p7si->auth_attr),nid,atrtype,value)); |
| 1195 | } |
| 1196 | |
| 1197 | int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
| 1198 | void *value) |
| 1199 | { |
| 1200 | return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value)); |
| 1201 | } |
| 1202 | |
| 1203 | static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
| 1204 | void *value) |
| 1205 | { |
| 1206 | X509_ATTRIBUTE *attr=NULL; |
| 1207 | |
| 1208 | if (*sk == NULL) |
| 1209 | { |
| 1210 | *sk = sk_X509_ATTRIBUTE_new_null(); |
| 1211 | if (*sk == NULL) |
| 1212 | return 0; |
| 1213 | new_attrib: |
| 1214 | if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value))) |
| 1215 | return 0; |
| 1216 | if (!sk_X509_ATTRIBUTE_push(*sk,attr)) |
| 1217 | { |
| 1218 | X509_ATTRIBUTE_free(attr); |
| 1219 | return 0; |
| 1220 | } |
| 1221 | } |
| 1222 | else |
| 1223 | { |
| 1224 | int i; |
| 1225 | |
| 1226 | for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++) |
| 1227 | { |
| 1228 | attr=sk_X509_ATTRIBUTE_value(*sk,i); |
| 1229 | if (OBJ_obj2nid(attr->object) == nid) |
| 1230 | { |
| 1231 | X509_ATTRIBUTE_free(attr); |
| 1232 | attr=X509_ATTRIBUTE_create(nid,atrtype,value); |
| 1233 | if (attr == NULL) |
| 1234 | return 0; |
| 1235 | if (!sk_X509_ATTRIBUTE_set(*sk,i,attr)) |
| 1236 | { |
| 1237 | X509_ATTRIBUTE_free(attr); |
| 1238 | return 0; |
| 1239 | } |
| 1240 | goto end; |
| 1241 | } |
| 1242 | } |
| 1243 | goto new_attrib; |
| 1244 | } |
| 1245 | end: |
| 1246 | return(1); |
| 1247 | } |
| 1248 | |