crypto/openssl/crypto/pkcs7/pk7_doit.c

   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 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
 142         {
 143         int i;
 144         BIO *out=NULL,*btmp=NULL;
 145         X509_ALGOR *xa = NULL;
 146         const EVP_CIPHER *evp_cipher=NULL;
 147         STACK_OF(X509_ALGOR) *md_sk=NULL;
 148         STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
 149         X509_ALGOR *xalg=NULL;
 150         PKCS7_RECIP_INFO *ri=NULL;
 151         EVP_PKEY *pkey;
 152         ASN1_OCTET_STRING *os=NULL;
 153
 154         if (p7 == NULL) {
 155                 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
 156                 return NULL;
 157         }
 158         /*
 159          * The content field in the PKCS7 ContentInfo is optional, but that really
 160          * only applies to inner content (precisely, detached signatures).
 161          *
 162          * When reading content, missing outer content is therefore treated as an
 163          * error.
 164          *
 165          * When creating content, PKCS7_content_new() must be called before
 166          * calling this method, so a NULL p7->d is always an error.
 167          */
 168         if (p7->d.ptr == NULL) {
 169                 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
 170                 return NULL;
 171         }
 172
 173         i=OBJ_obj2nid(p7->type);
 174         p7->state=PKCS7_S_HEADER;
 175
 176         switch (i)
 177                 {
 178         case NID_pkcs7_signed:
 179                 md_sk=p7->d.sign->md_algs;
 180                 os = PKCS7_get_octet_string(p7->d.sign->contents);
 181                 break;
 182         case NID_pkcs7_signedAndEnveloped:
 183                 rsk=p7->d.signed_and_enveloped->recipientinfo;
 184                 md_sk=p7->d.signed_and_enveloped->md_algs;
 185                 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
 186                 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
 187                 if (evp_cipher == NULL)
 188                         {
 189                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,
 190                                                 PKCS7_R_CIPHER_NOT_INITIALIZED);
 191                         goto err;
 192                         }
 193                 break;
 194         case NID_pkcs7_enveloped:
 195                 rsk=p7->d.enveloped->recipientinfo;
 196                 xalg=p7->d.enveloped->enc_data->algorithm;
 197                 evp_cipher=p7->d.enveloped->enc_data->cipher;
 198                 if (evp_cipher == NULL)
 199                         {
 200                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,
 201                                                 PKCS7_R_CIPHER_NOT_INITIALIZED);
 202                         goto err;
 203                         }
 204                 break;
 205         case NID_pkcs7_digest:
 206                 xa = p7->d.digest->md;
 207                 os = PKCS7_get_octet_string(p7->d.digest->contents);
 208                 break;
 209         default:
 210                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 211                 goto err;
 212                 }
 213
 214         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 215                 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
 216                         goto err;
 217
 218         if (xa && !PKCS7_bio_add_digest(&out, xa))
 219                         goto err;
 220
 221         if (evp_cipher != NULL)
 222                 {
 223                 unsigned char key[EVP_MAX_KEY_LENGTH];
 224                 unsigned char iv[EVP_MAX_IV_LENGTH];
 225                 int keylen,ivlen;
 226                 int jj,max;
 227                 unsigned char *tmp;
 228                 EVP_CIPHER_CTX *ctx;
 229
 230                 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
 231                         {
 232                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
 233                         goto err;
 234                         }
 235                 BIO_get_cipher_ctx(btmp, &ctx);
 236                 keylen=EVP_CIPHER_key_length(evp_cipher);
 237                 ivlen=EVP_CIPHER_iv_length(evp_cipher);
 238                 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
 239                 if (ivlen > 0)
 240                         if (RAND_pseudo_bytes(iv,ivlen) <= 0)
 241                                 goto err;
 242                 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
 243                         goto err;
 244                 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
 245                         goto err;
 246                 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
 247                         goto err;
 248
 249                 if (ivlen > 0) {
 250                         if (xalg->parameter == NULL) {
 251                                 xalg->parameter = ASN1_TYPE_new();
 252                                 if (xalg->parameter == NULL)
 253                                         goto err;
 254                         }
 255                         if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
 256                                goto err;
 257                 }
 258
 259                 /* Lets do the pub key stuff :-) */
 260                 max=0;
 261                 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 262                         {
 263                         ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 264                         if (ri->cert == NULL)
 265                                 {
 266                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
 267                                 goto err;
 268                                 }
 269                         if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
 270                                 goto err;
 271                         jj=EVP_PKEY_size(pkey);
 272                         EVP_PKEY_free(pkey);
 273                         if (max < jj) max=jj;
 274                         }
 275                 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
 276                         {
 277                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
 278                         goto err;
 279                         }
 280                 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 281                         {
 282                         ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 283                         if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
 284                                 goto err;
 285                         jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
 286                         EVP_PKEY_free(pkey);
 287                         if (jj <= 0)
 288                                 {
 289                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
 290                                 OPENSSL_free(tmp);
 291                                 goto err;
 292                                 }
 293                         if (!M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj))
 294                                 {
 295                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
 296                                         ERR_R_MALLOC_FAILURE);
 297                                 OPENSSL_free(tmp);
 298                                 goto err;
 299                                 }
 300                         }
 301                 OPENSSL_free(tmp);
 302                 OPENSSL_cleanse(key, keylen);
 303
 304                 if (out == NULL)
 305                         out=btmp;
 306                 else
 307                         BIO_push(out,btmp);
 308                 btmp=NULL;
 309                 }
 310
 311         if (bio == NULL)
 312                 {
 313                 if (PKCS7_is_detached(p7))
 314                         bio=BIO_new(BIO_s_null());
 315                 else if (os && os->length > 0)
 316                         bio = BIO_new_mem_buf(os->data, os->length);
 317                 if(bio == NULL)
 318                         {
 319                         bio=BIO_new(BIO_s_mem());
 320                         if (bio == NULL)
 321                                 goto err;
 322                         BIO_set_mem_eof_return(bio,0);
 323                         }
 324                 }
 325         BIO_push(out,bio);
 326         bio=NULL;
 327         if (0)
 328                 {
 329 err:
 330                 if (out != NULL)
 331                         BIO_free_all(out);
 332                 if (btmp != NULL)
 333                         BIO_free_all(btmp);
 334                 out=NULL;
 335                 }
 336         return(out);
 337         }
 338
 339 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
 340         {
 341         int ret;
 342         ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
 343                                 pcert->cert_info->issuer);
 344         if (ret)
 345                 return ret;
 346         return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
 347                                         ri->issuer_and_serial->serial);
 348         }
 349
 350 /* int */
 351 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
 352         {
 353         int i,j;
 354         BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
 355         unsigned char *tmp=NULL;
 356         X509_ALGOR *xa;
 357         ASN1_OCTET_STRING *data_body=NULL;
 358         const EVP_MD *evp_md;
 359         const EVP_CIPHER *evp_cipher=NULL;
 360         EVP_CIPHER_CTX *evp_ctx=NULL;
 361         X509_ALGOR *enc_alg=NULL;
 362         STACK_OF(X509_ALGOR) *md_sk=NULL;
 363         STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
 364         PKCS7_RECIP_INFO *ri=NULL;
 365
 366         if (p7 == NULL) {
 367                 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
 368                 return NULL;
 369         }
 370
 371         if (p7->d.ptr == NULL) {
 372                 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
 373                 return NULL;
 374         }
 375
 376         i=OBJ_obj2nid(p7->type);
 377         p7->state=PKCS7_S_HEADER;
 378
 379         switch (i)
 380                 {
 381         case NID_pkcs7_signed:
 382                 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
 383                 md_sk=p7->d.sign->md_algs;
 384                 break;
 385         case NID_pkcs7_signedAndEnveloped:
 386                 rsk=p7->d.signed_and_enveloped->recipientinfo;
 387                 md_sk=p7->d.signed_and_enveloped->md_algs;
 388                 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
 389                 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
 390                 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
 391                 if (evp_cipher == NULL)
 392                         {
 393                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 394                         goto err;
 395                         }
 396                 break;
 397         case NID_pkcs7_enveloped:
 398                 rsk=p7->d.enveloped->recipientinfo;
 399                 enc_alg=p7->d.enveloped->enc_data->algorithm;
 400                 data_body=p7->d.enveloped->enc_data->enc_data;
 401                 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
 402                 if (evp_cipher == NULL)
 403                         {
 404                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 405                         goto err;
 406                         }
 407                 break;
 408         default:
 409                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 410                 goto err;
 411                 }
 412
 413     /* Detached content must be supplied via in_bio instead. */
 414     if (data_body == NULL && in_bio == NULL) {
 415         PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
 416         goto err;
 417     }
 418
 419         /* We will be checking the signature */
 420         if (md_sk != NULL)
 421                 {
 422                 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 423                         {
 424                         xa=sk_X509_ALGOR_value(md_sk,i);
 425                         if ((btmp=BIO_new(BIO_f_md())) == NULL)
 426                                 {
 427                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
 428                                 goto err;
 429                                 }
 430
 431                         j=OBJ_obj2nid(xa->algorithm);
 432                         evp_md=EVP_get_digestbynid(j);
 433                         if (evp_md == NULL)
 434                                 {
 435                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
 436                                 goto err;
 437                                 }
 438
 439                         BIO_set_md(btmp,evp_md);
 440                         if (out == NULL)
 441                                 out=btmp;
 442                         else
 443                                 BIO_push(out,btmp);
 444                         btmp=NULL;
 445                         }
 446                 }
 447
 448         if (evp_cipher != NULL)
 449                 {
 450 #if 0
 451                 unsigned char key[EVP_MAX_KEY_LENGTH];
 452                 unsigned char iv[EVP_MAX_IV_LENGTH];
 453                 unsigned char *p;
 454                 int keylen,ivlen;
 455                 int max;
 456                 X509_OBJECT ret;
 457 #endif
 458                 unsigned char *tkey = NULL;
 459                 int tkeylen;
 460                 int jj;
 461
 462                 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
 463                         {
 464                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
 465                         goto err;
 466                         }
 467
 468                 /* It was encrypted, we need to decrypt the secret key
 469                  * with the private key */
 470
 471                 /* Find the recipientInfo which matches the passed certificate
 472                  * (if any)
 473                  */
 474
 475                 if (pcert) {
 476                         for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
 477                                 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 478                                 if (!pkcs7_cmp_ri(ri, pcert))
 479                                         break;
 480                                 ri=NULL;
 481                         }
 482                         if (ri == NULL) {
 483                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
 484                                       PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
 485                                 goto err;
 486                         }
 487                 }
 488
 489                 jj=EVP_PKEY_size(pkey);
 490                 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
 491                 if (tmp == NULL)
 492                         {
 493                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
 494                         goto err;
 495                         }
 496
 497                 /* If we haven't got a certificate try each ri in turn */
 498
 499                 if (pcert == NULL)
 500                         {
 501                         /* Temporary storage in case EVP_PKEY_decrypt
 502                          * overwrites output buffer on error.
 503                          */
 504                         unsigned char *tmp2;
 505                         tmp2 = OPENSSL_malloc(jj);
 506                         if (!tmp2)
 507                                 goto err;
 508                         jj = -1;
 509                         /* Always attempt to decrypt all cases to avoid
 510                          * leaking timing information about a successful
 511                          * decrypt.
 512                          */
 513                         for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 514                                 {
 515                                 int tret;
 516                                 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 517                                 tret=EVP_PKEY_decrypt(tmp2,
 518                                         M_ASN1_STRING_data(ri->enc_key),
 519                                         M_ASN1_STRING_length(ri->enc_key),
 520                                                 pkey);
 521                                 if (tret > 0)
 522                                         {
 523                                         memcpy(tmp, tmp2, tret);
 524                                         OPENSSL_cleanse(tmp2, tret);
 525                                         jj = tret;
 526                                         }
 527                                 ERR_clear_error();
 528                                 }
 529                         OPENSSL_free(tmp2);
 530                         }
 531                 else
 532                         {
 533                         jj=EVP_PKEY_decrypt(tmp,
 534                                 M_ASN1_STRING_data(ri->enc_key),
 535                                 M_ASN1_STRING_length(ri->enc_key), pkey);
 536                         ERR_clear_error();
 537                         }
 538
 539                 evp_ctx=NULL;
 540                 BIO_get_cipher_ctx(etmp,&evp_ctx);
 541                 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
 542                         goto err;
 543                 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
 544                         goto err;
 545                 /* Generate random key to counter MMA */
 546                 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
 547                 tkey = OPENSSL_malloc(tkeylen);
 548                 if (!tkey)
 549                         goto err;
 550                 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
 551                         goto err;
 552                 /* If we have no key use random key */
 553                 if (jj <= 0)
 554                         {
 555                         OPENSSL_free(tmp);
 556                         jj = tkeylen;
 557                         tmp = tkey;
 558                         tkey = NULL;
 559                         }
 560
 561                 if (jj != tkeylen) {
 562                         /* Some S/MIME clients don't use the same key
 563                          * and effective key length. The key length is
 564                          * determined by the size of the decrypted RSA key.
 565                          */
 566                         if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
 567                                 {
 568                                 /* As MMA defence use random key instead */
 569                                 OPENSSL_cleanse(tmp, jj);
 570                                 OPENSSL_free(tmp);
 571                                 jj = tkeylen;
 572                                 tmp = tkey;
 573                                 tkey = NULL;
 574                                 }
 575                 }
 576                 ERR_clear_error();
 577                 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
 578                         goto err;
 579
 580                 OPENSSL_cleanse(tmp,jj);
 581
 582                 if (tkey)
 583                         {
 584                         OPENSSL_cleanse(tkey, tkeylen);
 585                         OPENSSL_free(tkey);
 586                         }
 587
 588                 if (out == NULL)
 589                         out=etmp;
 590                 else
 591                         BIO_push(out,etmp);
 592                 etmp=NULL;
 593                 }
 594
 595 #if 1
 596         if (in_bio != NULL) {
 597                 bio = in_bio;
 598         } else {
 599 #if 0
 600                 bio=BIO_new(BIO_s_mem());
 601                 /* We need to set this so that when we have read all
 602                  * the data, the encrypt BIO, if present, will read
 603                  * EOF and encode the last few bytes */
 604                 BIO_set_mem_eof_return(bio,0);
 605
 606                 if (data_body->length > 0)
 607                         BIO_write(bio,(char *)data_body->data,data_body->length);
 608 #else
 609                 if (data_body->length > 0)
 610                       bio = BIO_new_mem_buf(data_body->data,data_body->length);
 611                 else {
 612                         bio=BIO_new(BIO_s_mem());
 613                         BIO_set_mem_eof_return(bio,0);
 614                 }
 615                 if (bio == NULL)
 616                         goto err;
 617 #endif
 618                 }
 619         BIO_push(out,bio);
 620         bio=NULL;
 621 #endif
 622         if (0)
 623                 {
 624 err:
 625                 if (out != NULL) BIO_free_all(out);
 626                 if (btmp != NULL) BIO_free_all(btmp);
 627                 if (etmp != NULL) BIO_free_all(etmp);
 628                 if (bio != NULL) BIO_free_all(bio);
 629                 out=NULL;
 630                 }
 631         if (tmp != NULL)
 632                 OPENSSL_free(tmp);
 633         return(out);
 634         }
 635
 636 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
 637         {
 638         for (;;)
 639                 {
 640                 bio=BIO_find_type(bio,BIO_TYPE_MD);
 641                 if (bio == NULL)
 642                         {
 643                         PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 644                         return NULL;
 645                         }
 646                 BIO_get_md_ctx(bio,pmd);
 647                 if (*pmd == NULL)
 648                         {
 649                         PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
 650                         return NULL;
 651                         }
 652                 if (EVP_MD_CTX_type(*pmd) == nid)
 653                         return bio;
 654                 bio=BIO_next(bio);
 655                 }
 656         return NULL;
 657         }
 658
 659 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
 660         {
 661         int ret=0;
 662         int i,j;
 663         BIO *btmp;
 664         BUF_MEM *buf_mem=NULL;
 665         BUF_MEM *buf=NULL;
 666         PKCS7_SIGNER_INFO *si;
 667         EVP_MD_CTX *mdc,ctx_tmp;
 668         STACK_OF(X509_ATTRIBUTE) *sk;
 669         STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
 670         ASN1_OCTET_STRING *os=NULL;
 671
 672         if (p7 == NULL) {
 673                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
 674                 return 0;
 675         }
 676
 677         if (p7->d.ptr == NULL) {
 678                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
 679                 return 0;
 680         }
 681
 682         EVP_MD_CTX_init(&ctx_tmp);
 683         i=OBJ_obj2nid(p7->type);
 684         p7->state=PKCS7_S_HEADER;
 685
 686         switch (i)
 687                 {
 688         case NID_pkcs7_signedAndEnveloped:
 689                 /* XXXXXXXXXXXXXXXX */
 690                 si_sk=p7->d.signed_and_enveloped->signer_info;
 691                 if (!(os=M_ASN1_OCTET_STRING_new()))
 692                         {
 693                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
 694                         goto err;
 695                         }
 696                 p7->d.signed_and_enveloped->enc_data->enc_data=os;
 697                 break;
 698         case NID_pkcs7_enveloped:
 699                 /* XXXXXXXXXXXXXXXX */
 700                 if (!(os=M_ASN1_OCTET_STRING_new()))
 701                         {
 702                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
 703                         goto err;
 704                         }
 705                 p7->d.enveloped->enc_data->enc_data=os;
 706                 break;
 707         case NID_pkcs7_signed:
 708                 si_sk=p7->d.sign->signer_info;
 709                 os=PKCS7_get_octet_string(p7->d.sign->contents);
 710                 /* If detached data then the content is excluded */
 711                 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
 712                         M_ASN1_OCTET_STRING_free(os);
 713                         os = NULL;
 714                         p7->d.sign->contents->d.data = NULL;
 715                 }
 716                 break;
 717
 718         case NID_pkcs7_digest:
 719                 os=PKCS7_get_octet_string(p7->d.digest->contents);
 720                 /* If detached data then the content is excluded */
 721                 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
 722                         {
 723                         M_ASN1_OCTET_STRING_free(os);
 724                         os = NULL;
 725                         p7->d.digest->contents->d.data = NULL;
 726                         }
 727                 break;
 728
 729                 }
 730
 731         if (si_sk != NULL)
 732                 {
 733                 if ((buf=BUF_MEM_new()) == NULL)
 734                         {
 735                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
 736                         goto err;
 737                         }
 738                 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
 739                         {
 740                         si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
 741                         if (si->pkey == NULL) continue;
 742
 743                         j=OBJ_obj2nid(si->digest_alg->algorithm);
 744
 745                         btmp=bio;
 746
 747                         btmp = PKCS7_find_digest(&mdc, btmp, j);
 748
 749                         if (btmp == NULL)
 750                                 goto err;
 751
 752                         /* We now have the EVP_MD_CTX, lets do the
 753                          * signing. */
 754                         EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
 755                         if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
 756                                 {
 757                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
 758                                 goto err;
 759                                 }
 760
 761                         sk=si->auth_attr;
 762
 763                         /* If there are attributes, we add the digest
 764                          * attribute and only sign the attributes */
 765                         if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
 766                                 {
 767                                 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
 768                                 unsigned int md_len, alen;
 769                                 ASN1_OCTET_STRING *digest;
 770                                 ASN1_UTCTIME *sign_time;
 771                                 const EVP_MD *md_tmp;
 772
 773                                 /* Add signing time if not already present */
 774                                 if (!PKCS7_get_signed_attribute(si,
 775                                                         NID_pkcs9_signingTime))
 776                                         {
 777                                         if (!(sign_time=X509_gmtime_adj(NULL,0)))
 778                                                 {
 779                                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 780                                                         ERR_R_MALLOC_FAILURE);
 781                                                 goto err;
 782                                                 }
 783                                         if (!PKCS7_add_signed_attribute(si,
 784                                                 NID_pkcs9_signingTime,
 785                                                 V_ASN1_UTCTIME,sign_time))
 786                                                 {
 787                                                 M_ASN1_UTCTIME_free(sign_time);
 788                                                 goto err;
 789                                                 }
 790                                         }
 791
 792                                 /* Add digest */
 793                                 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
 794                                 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
 795                                 if (!(digest=M_ASN1_OCTET_STRING_new()))
 796                                         {
 797                                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 798                                                 ERR_R_MALLOC_FAILURE);
 799                                         goto err;
 800                                         }
 801                                 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
 802                                                                 md_len))
 803                                         {
 804                                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 805                                                 ERR_R_MALLOC_FAILURE);
 806                                         M_ASN1_OCTET_STRING_free(digest);
 807                                         goto err;
 808                                         }
 809                                 if (!PKCS7_add_signed_attribute(si,
 810                                         NID_pkcs9_messageDigest,
 811                                         V_ASN1_OCTET_STRING,digest))
 812                                         {
 813                                         M_ASN1_OCTET_STRING_free(digest);
 814                                         goto err;
 815                                         }
 816
 817                                 /* Now sign the attributes */
 818                                 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
 819                                 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
 820                                                         ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
 821                                 if(!abuf) goto err;
 822                                 EVP_SignUpdate(&ctx_tmp,abuf,alen);
 823                                 OPENSSL_free(abuf);
 824                                 }
 825
 826 #ifndef OPENSSL_NO_DSA
 827                         if (si->pkey->type == EVP_PKEY_DSA)
 828                                 ctx_tmp.digest=EVP_dss1();
 829 #endif
 830 #ifndef OPENSSL_NO_ECDSA
 831                         if (si->pkey->type == EVP_PKEY_EC)
 832                                 ctx_tmp.digest=EVP_ecdsa();
 833 #endif
 834
 835                         if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
 836                                 (unsigned int *)&buf->length,si->pkey))
 837                                 {
 838                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
 839                                 goto err;
 840                                 }
 841                         if (!ASN1_STRING_set(si->enc_digest,
 842                                 (unsigned char *)buf->data,buf->length))
 843                                 {
 844                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
 845                                 goto err;
 846                                 }
 847                         }
 848                 }
 849         else if (i == NID_pkcs7_digest)
 850                 {
 851                 unsigned char md_data[EVP_MAX_MD_SIZE];
 852                 unsigned int md_len;
 853                 if (!PKCS7_find_digest(&mdc, bio,
 854                                 OBJ_obj2nid(p7->d.digest->md->algorithm)))
 855                         goto err;
 856                 EVP_DigestFinal_ex(mdc,md_data,&md_len);
 857                 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
 858                 }
 859
 860         if (!PKCS7_is_detached(p7)) {
 861                 /*
 862                  * NOTE(emilia): I think we only reach os == NULL here because detached
 863                  * digested data support is broken.
 864                  */
 865                 if (os == NULL)
 866                         goto err;
 867                 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
 868                 if (btmp == NULL)
 869                         {
 870                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
 871                         goto err;
 872                         }
 873                 BIO_get_mem_ptr(btmp,&buf_mem);
 874                 /* Mark the BIO read only then we can use its copy of the data
 875                  * instead of making an extra copy.
 876                  */
 877                 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
 878                 BIO_set_mem_eof_return(btmp, 0);
 879                 os->data = (unsigned char *)buf_mem->data;
 880                 os->length = buf_mem->length;
 881 #if 0
 882                 M_ASN1_OCTET_STRING_set(os,
 883                         (unsigned char *)buf_mem->data,buf_mem->length);
 884 #endif
 885                 }
 886         ret=1;
 887 err:
 888         EVP_MD_CTX_cleanup(&ctx_tmp);
 889         if (buf != NULL) BUF_MEM_free(buf);
 890         return(ret);
 891         }
 892
 893 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
 894              PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 895         {
 896         PKCS7_ISSUER_AND_SERIAL *ias;
 897         int ret=0,i;
 898         STACK_OF(X509) *cert;
 899         X509 *x509;
 900
 901         if (p7 == NULL) {
 902                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
 903                 return 0;
 904         }
 905
 906         if (p7->d.ptr == NULL) {
 907                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
 908                 return 0;
 909         }
 910
 911         if (PKCS7_type_is_signed(p7))
 912                 {
 913                 cert=p7->d.sign->cert;
 914                 }
 915         else if (PKCS7_type_is_signedAndEnveloped(p7))
 916                 {
 917                 cert=p7->d.signed_and_enveloped->cert;
 918                 }
 919         else
 920                 {
 921                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
 922                 goto err;
 923                 }
 924         /* XXXXXXXXXXXXXXXXXXXXXXX */
 925         ias=si->issuer_and_serial;
 926
 927         x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
 928
 929         /* were we able to find the cert in passed to us */
 930         if (x509 == NULL)
 931                 {
 932                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
 933                 goto err;
 934                 }
 935
 936         /* Lets verify */
 937         if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
 938                 {
 939                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 940                 goto err;
 941                 }
 942         X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
 943         i=X509_verify_cert(ctx);
 944         if (i <= 0)
 945                 {
 946                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 947                 X509_STORE_CTX_cleanup(ctx);
 948                 goto err;
 949                 }
 950         X509_STORE_CTX_cleanup(ctx);
 951
 952         return PKCS7_signatureVerify(bio, p7, si, x509);
 953         err:
 954         return ret;
 955         }
 956
 957 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
 958                                                                 X509 *x509)
 959         {
 960         ASN1_OCTET_STRING *os;
 961         EVP_MD_CTX mdc_tmp,*mdc;
 962         int ret=0,i;
 963         int md_type;
 964         STACK_OF(X509_ATTRIBUTE) *sk;
 965         BIO *btmp;
 966         EVP_PKEY *pkey;
 967
 968         EVP_MD_CTX_init(&mdc_tmp);
 969
 970         if (!PKCS7_type_is_signed(p7) &&
 971                                 !PKCS7_type_is_signedAndEnveloped(p7)) {
 972                 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 973                                                 PKCS7_R_WRONG_PKCS7_TYPE);
 974                 goto err;
 975         }
 976
 977         md_type=OBJ_obj2nid(si->digest_alg->algorithm);
 978
 979         btmp=bio;
 980         for (;;)
 981                 {
 982                 if ((btmp == NULL) ||
 983                         ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
 984                         {
 985                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 986                                         PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 987                         goto err;
 988                         }
 989                 BIO_get_md_ctx(btmp,&mdc);
 990                 if (mdc == NULL)
 991                         {
 992                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 993                                                         ERR_R_INTERNAL_ERROR);
 994                         goto err;
 995                         }
 996                 if (EVP_MD_CTX_type(mdc) == md_type)
 997                         break;
 998                 /* Workaround for some broken clients that put the signature
 999                  * OID instead of the digest OID in digest_alg->algorithm
1000                  */
1001                 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1002                         break;
1003                 btmp=BIO_next(btmp);
1004                 }
1005
1006         /* mdc is the digest ctx that we want, unless there are attributes,
1007          * in which case the digest is the signed attributes */
1008         EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
1009
1010         sk=si->auth_attr;
1011         if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1012                 {
1013                 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1014                 unsigned int md_len, alen;
1015                 ASN1_OCTET_STRING *message_digest;
1016
1017                 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
1018                 message_digest=PKCS7_digest_from_attributes(sk);
1019                 if (!message_digest)
1020                         {
1021                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1022                                         PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1023                         goto err;
1024                         }
1025                 if ((message_digest->length != (int)md_len) ||
1026                         (memcmp(message_digest->data,md_dat,md_len)))
1027                         {
1028 #if 0
1029 {
1030 int ii;
1031 for (ii=0; ii<message_digest->length; ii++)
1032         printf("%02X",message_digest->data[ii]); printf(" sent\n");
1033 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1034 }
1035 #endif
1036                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1037                                                         PKCS7_R_DIGEST_FAILURE);
1038                         ret= -1;
1039                         goto err;
1040                         }
1041
1042                 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
1043
1044                 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1045                                                 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1046                 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
1047
1048                 OPENSSL_free(abuf);
1049                 }
1050
1051         os=si->enc_digest;
1052         pkey = X509_get_pubkey(x509);
1053         if (!pkey)
1054                 {
1055                 ret = -1;
1056                 goto err;
1057                 }
1058 #ifndef OPENSSL_NO_DSA
1059         if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
1060 #endif
1061 #ifndef OPENSSL_NO_ECDSA
1062         if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
1063 #endif
1064
1065         i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1066         EVP_PKEY_free(pkey);
1067         if (i <= 0)
1068                 {
1069                 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1070                                                 PKCS7_R_SIGNATURE_FAILURE);
1071                 ret= -1;
1072                 goto err;
1073                 }
1074         else
1075                 ret=1;
1076 err:
1077         EVP_MD_CTX_cleanup(&mdc_tmp);
1078         return(ret);
1079         }
1080
1081 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1082         {
1083         STACK_OF(PKCS7_RECIP_INFO) *rsk;
1084         PKCS7_RECIP_INFO *ri;
1085         int i;
1086
1087         i=OBJ_obj2nid(p7->type);
1088         if (i != NID_pkcs7_signedAndEnveloped)
1089                 return NULL;
1090         if (p7->d.signed_and_enveloped == NULL)
1091                 return NULL;
1092         rsk=p7->d.signed_and_enveloped->recipientinfo;
1093         if (rsk == NULL)
1094                 return NULL;
1095         ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1096         if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1097         ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1098         return(ri->issuer_and_serial);
1099         }
1100
1101 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1102         {
1103         return(get_attribute(si->auth_attr,nid));
1104         }
1105
1106 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1107         {
1108         return(get_attribute(si->unauth_attr,nid));
1109         }
1110
1111 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1112         {
1113         int i;
1114         X509_ATTRIBUTE *xa;
1115         ASN1_OBJECT *o;
1116
1117         o=OBJ_nid2obj(nid);
1118         if (!o || !sk) return(NULL);
1119         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1120                 {
1121                 xa=sk_X509_ATTRIBUTE_value(sk,i);
1122                 if (OBJ_cmp(xa->object,o) == 0)
1123                         {
1124                         if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1125                                 return(sk_ASN1_TYPE_value(xa->value.set,0));
1126                         else
1127                                 return(NULL);
1128                         }
1129                 }
1130         return(NULL);
1131         }
1132
1133 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1134 {
1135         ASN1_TYPE *astype;
1136         if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1137         return astype->value.octet_string;
1138 }
1139
1140 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1141                                 STACK_OF(X509_ATTRIBUTE) *sk)
1142         {
1143         int i;
1144
1145         if (p7si->auth_attr != NULL)
1146                 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1147         p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1148         if (p7si->auth_attr == NULL)
1149                 return 0;
1150         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1151                 {
1152                 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1153                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1154                     == NULL)
1155                         return(0);
1156                 }
1157         return(1);
1158         }
1159
1160 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1161         {
1162         int i;
1163
1164         if (p7si->unauth_attr != NULL)
1165                 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1166                                            X509_ATTRIBUTE_free);
1167         p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1168         if (p7si->unauth_attr == NULL)
1169                 return 0;
1170         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1171                 {
1172                 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1173                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1174                     == NULL)
1175                         return(0);
1176                 }
1177         return(1);
1178         }
1179
1180 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1181              void *value)
1182         {
1183         return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1184         }
1185
1186 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1187              void *value)
1188         {
1189         return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1190         }
1191
1192 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1193                          void *value)
1194         {
1195         X509_ATTRIBUTE *attr=NULL;
1196
1197         if (*sk == NULL)
1198                 {
1199                 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1200                         return 0;
1201 new_attrib:
1202                 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1203                         return 0;
1204                 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1205                         {
1206                         X509_ATTRIBUTE_free(attr);
1207                         return 0;
1208                         }
1209                 }
1210         else
1211                 {
1212                 int i;
1213
1214                 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1215                         {
1216                         attr=sk_X509_ATTRIBUTE_value(*sk,i);
1217                         if (OBJ_obj2nid(attr->object) == nid)
1218                                 {
1219                                 X509_ATTRIBUTE_free(attr);
1220                                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1221                                 if (attr == NULL)
1222                                         return 0;
1223                                 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1224                                         {
1225                                         X509_ATTRIBUTE_free(attr);
1226                                         return 0;
1227                                         }
1228                                 goto end;
1229                                 }
1230                         }
1231                 goto new_attrib;
1232                 }
1233 end:
1234         return(1);
1235         }
1236