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         /* We will be checking the signature */
 414         if (md_sk != NULL)
 415                 {
 416                 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 417                         {
 418                         xa=sk_X509_ALGOR_value(md_sk,i);
 419                         if ((btmp=BIO_new(BIO_f_md())) == NULL)
 420                                 {
 421                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
 422                                 goto err;
 423                                 }
 424
 425                         j=OBJ_obj2nid(xa->algorithm);
 426                         evp_md=EVP_get_digestbynid(j);
 427                         if (evp_md == NULL)
 428                                 {
 429                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
 430                                 goto err;
 431                                 }
 432
 433                         BIO_set_md(btmp,evp_md);
 434                         if (out == NULL)
 435                                 out=btmp;
 436                         else
 437                                 BIO_push(out,btmp);
 438                         btmp=NULL;
 439                         }
 440                 }
 441
 442         if (evp_cipher != NULL)
 443                 {
 444 #if 0
 445                 unsigned char key[EVP_MAX_KEY_LENGTH];
 446                 unsigned char iv[EVP_MAX_IV_LENGTH];
 447                 unsigned char *p;
 448                 int keylen,ivlen;
 449                 int max;
 450                 X509_OBJECT ret;
 451 #endif
 452                 unsigned char *tkey = NULL;
 453                 int tkeylen;
 454                 int jj;
 455
 456                 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
 457                         {
 458                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
 459                         goto err;
 460                         }
 461
 462                 /* It was encrypted, we need to decrypt the secret key
 463                  * with the private key */
 464
 465                 /* Find the recipientInfo which matches the passed certificate
 466                  * (if any)
 467                  */
 468
 469                 if (pcert) {
 470                         for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
 471                                 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 472                                 if (!pkcs7_cmp_ri(ri, pcert))
 473                                         break;
 474                                 ri=NULL;
 475                         }
 476                         if (ri == NULL) {
 477                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
 478                                       PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
 479                                 goto err;
 480                         }
 481                 }
 482
 483                 jj=EVP_PKEY_size(pkey);
 484                 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
 485                 if (tmp == NULL)
 486                         {
 487                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
 488                         goto err;
 489                         }
 490
 491                 /* If we haven't got a certificate try each ri in turn */
 492
 493                 if (pcert == NULL)
 494                         {
 495                         /* Temporary storage in case EVP_PKEY_decrypt
 496                          * overwrites output buffer on error.
 497                          */
 498                         unsigned char *tmp2;
 499                         tmp2 = OPENSSL_malloc(jj);
 500                         if (!tmp2)
 501                                 goto err;
 502                         jj = -1;
 503                         /* Always attempt to decrypt all cases to avoid
 504                          * leaking timing information about a successful
 505                          * decrypt.
 506                          */
 507                         for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 508                                 {
 509                                 int tret;
 510                                 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 511                                 tret=EVP_PKEY_decrypt(tmp2,
 512                                         M_ASN1_STRING_data(ri->enc_key),
 513                                         M_ASN1_STRING_length(ri->enc_key),
 514                                                 pkey);
 515                                 if (tret > 0)
 516                                         {
 517                                         memcpy(tmp, tmp2, tret);
 518                                         OPENSSL_cleanse(tmp2, tret);
 519                                         jj = tret;
 520                                         }
 521                                 ERR_clear_error();
 522                                 }
 523                         OPENSSL_free(tmp2);
 524                         }
 525                 else
 526                         {
 527                         jj=EVP_PKEY_decrypt(tmp,
 528                                 M_ASN1_STRING_data(ri->enc_key),
 529                                 M_ASN1_STRING_length(ri->enc_key), pkey);
 530                         ERR_clear_error();
 531                         }
 532
 533                 evp_ctx=NULL;
 534                 BIO_get_cipher_ctx(etmp,&evp_ctx);
 535                 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
 536                         goto err;
 537                 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
 538                         goto err;
 539                 /* Generate random key to counter MMA */
 540                 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
 541                 tkey = OPENSSL_malloc(tkeylen);
 542                 if (!tkey)
 543                         goto err;
 544                 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
 545                         goto err;
 546                 /* If we have no key use random key */
 547                 if (jj <= 0)
 548                         {
 549                         OPENSSL_free(tmp);
 550                         jj = tkeylen;
 551                         tmp = tkey;
 552                         tkey = NULL;
 553                         }
 554
 555                 if (jj != tkeylen) {
 556                         /* Some S/MIME clients don't use the same key
 557                          * and effective key length. The key length is
 558                          * determined by the size of the decrypted RSA key.
 559                          */
 560                         if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
 561                                 {
 562                                 /* As MMA defence use random key instead */
 563                                 OPENSSL_cleanse(tmp, jj);
 564                                 OPENSSL_free(tmp);
 565                                 jj = tkeylen;
 566                                 tmp = tkey;
 567                                 tkey = NULL;
 568                                 }
 569                 }
 570                 ERR_clear_error();
 571                 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
 572                         goto err;
 573
 574                 OPENSSL_cleanse(tmp,jj);
 575
 576                 if (tkey)
 577                         {
 578                         OPENSSL_cleanse(tkey, tkeylen);
 579                         OPENSSL_free(tkey);
 580                         }
 581
 582                 if (out == NULL)
 583                         out=etmp;
 584                 else
 585                         BIO_push(out,etmp);
 586                 etmp=NULL;
 587                 }
 588
 589 #if 1
 590         if (PKCS7_is_detached(p7) || (in_bio != NULL))
 591                 {
 592                 bio=in_bio;
 593                 }
 594         else
 595                 {
 596 #if 0
 597                 bio=BIO_new(BIO_s_mem());
 598                 /* We need to set this so that when we have read all
 599                  * the data, the encrypt BIO, if present, will read
 600                  * EOF and encode the last few bytes */
 601                 BIO_set_mem_eof_return(bio,0);
 602
 603                 if (data_body->length > 0)
 604                         BIO_write(bio,(char *)data_body->data,data_body->length);
 605 #else
 606                 if (data_body->length > 0)
 607                       bio = BIO_new_mem_buf(data_body->data,data_body->length);
 608                 else {
 609                         bio=BIO_new(BIO_s_mem());
 610                         BIO_set_mem_eof_return(bio,0);
 611                 }
 612                 if (bio == NULL)
 613                         goto err;
 614 #endif
 615                 }
 616         BIO_push(out,bio);
 617         bio=NULL;
 618 #endif
 619         if (0)
 620                 {
 621 err:
 622                 if (out != NULL) BIO_free_all(out);
 623                 if (btmp != NULL) BIO_free_all(btmp);
 624                 if (etmp != NULL) BIO_free_all(etmp);
 625                 if (bio != NULL) BIO_free_all(bio);
 626                 out=NULL;
 627                 }
 628         if (tmp != NULL)
 629                 OPENSSL_free(tmp);
 630         return(out);
 631         }
 632
 633 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
 634         {
 635         for (;;)
 636                 {
 637                 bio=BIO_find_type(bio,BIO_TYPE_MD);
 638                 if (bio == NULL)
 639                         {
 640                         PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 641                         return NULL;
 642                         }
 643                 BIO_get_md_ctx(bio,pmd);
 644                 if (*pmd == NULL)
 645                         {
 646                         PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
 647                         return NULL;
 648                         }
 649                 if (EVP_MD_CTX_type(*pmd) == nid)
 650                         return bio;
 651                 bio=BIO_next(bio);
 652                 }
 653         return NULL;
 654         }
 655
 656 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
 657         {
 658         int ret=0;
 659         int i,j;
 660         BIO *btmp;
 661         BUF_MEM *buf_mem=NULL;
 662         BUF_MEM *buf=NULL;
 663         PKCS7_SIGNER_INFO *si;
 664         EVP_MD_CTX *mdc,ctx_tmp;
 665         STACK_OF(X509_ATTRIBUTE) *sk;
 666         STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
 667         ASN1_OCTET_STRING *os=NULL;
 668
 669         if (p7 == NULL) {
 670                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
 671                 return 0;
 672         }
 673
 674         if (p7->d.ptr == NULL) {
 675                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
 676                 return 0;
 677         }
 678
 679         EVP_MD_CTX_init(&ctx_tmp);
 680         i=OBJ_obj2nid(p7->type);
 681         p7->state=PKCS7_S_HEADER;
 682
 683         switch (i)
 684                 {
 685         case NID_pkcs7_signedAndEnveloped:
 686                 /* XXXXXXXXXXXXXXXX */
 687                 si_sk=p7->d.signed_and_enveloped->signer_info;
 688                 if (!(os=M_ASN1_OCTET_STRING_new()))
 689                         {
 690                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
 691                         goto err;
 692                         }
 693                 p7->d.signed_and_enveloped->enc_data->enc_data=os;
 694                 break;
 695         case NID_pkcs7_enveloped:
 696                 /* XXXXXXXXXXXXXXXX */
 697                 if (!(os=M_ASN1_OCTET_STRING_new()))
 698                         {
 699                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
 700                         goto err;
 701                         }
 702                 p7->d.enveloped->enc_data->enc_data=os;
 703                 break;
 704         case NID_pkcs7_signed:
 705                 si_sk=p7->d.sign->signer_info;
 706                 os=PKCS7_get_octet_string(p7->d.sign->contents);
 707                 /* If detached data then the content is excluded */
 708                 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
 709                         M_ASN1_OCTET_STRING_free(os);
 710                         os = NULL;
 711                         p7->d.sign->contents->d.data = NULL;
 712                 }
 713                 break;
 714
 715         case NID_pkcs7_digest:
 716                 os=PKCS7_get_octet_string(p7->d.digest->contents);
 717                 /* If detached data then the content is excluded */
 718                 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
 719                         {
 720                         M_ASN1_OCTET_STRING_free(os);
 721                         os = NULL;
 722                         p7->d.digest->contents->d.data = NULL;
 723                         }
 724                 break;
 725
 726                 }
 727
 728         if (si_sk != NULL)
 729                 {
 730                 if ((buf=BUF_MEM_new()) == NULL)
 731                         {
 732                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
 733                         goto err;
 734                         }
 735                 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
 736                         {
 737                         si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
 738                         if (si->pkey == NULL) continue;
 739
 740                         j=OBJ_obj2nid(si->digest_alg->algorithm);
 741
 742                         btmp=bio;
 743
 744                         btmp = PKCS7_find_digest(&mdc, btmp, j);
 745
 746                         if (btmp == NULL)
 747                                 goto err;
 748
 749                         /* We now have the EVP_MD_CTX, lets do the
 750                          * signing. */
 751                         EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
 752                         if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
 753                                 {
 754                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
 755                                 goto err;
 756                                 }
 757
 758                         sk=si->auth_attr;
 759
 760                         /* If there are attributes, we add the digest
 761                          * attribute and only sign the attributes */
 762                         if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
 763                                 {
 764                                 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
 765                                 unsigned int md_len, alen;
 766                                 ASN1_OCTET_STRING *digest;
 767                                 ASN1_UTCTIME *sign_time;
 768                                 const EVP_MD *md_tmp;
 769
 770                                 /* Add signing time if not already present */
 771                                 if (!PKCS7_get_signed_attribute(si,
 772                                                         NID_pkcs9_signingTime))
 773                                         {
 774                                         if (!(sign_time=X509_gmtime_adj(NULL,0)))
 775                                                 {
 776                                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 777                                                         ERR_R_MALLOC_FAILURE);
 778                                                 goto err;
 779                                                 }
 780                                         if (!PKCS7_add_signed_attribute(si,
 781                                                 NID_pkcs9_signingTime,
 782                                                 V_ASN1_UTCTIME,sign_time))
 783                                                 {
 784                                                 M_ASN1_UTCTIME_free(sign_time);
 785                                                 goto err;
 786                                                 }
 787                                         }
 788
 789                                 /* Add digest */
 790                                 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
 791                                 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
 792                                 if (!(digest=M_ASN1_OCTET_STRING_new()))
 793                                         {
 794                                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 795                                                 ERR_R_MALLOC_FAILURE);
 796                                         goto err;
 797                                         }
 798                                 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
 799                                                                 md_len))
 800                                         {
 801                                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 802                                                 ERR_R_MALLOC_FAILURE);
 803                                         M_ASN1_OCTET_STRING_free(digest);
 804                                         goto err;
 805                                         }
 806                                 if (!PKCS7_add_signed_attribute(si,
 807                                         NID_pkcs9_messageDigest,
 808                                         V_ASN1_OCTET_STRING,digest))
 809                                         {
 810                                         M_ASN1_OCTET_STRING_free(digest);
 811                                         goto err;
 812                                         }
 813
 814                                 /* Now sign the attributes */
 815                                 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
 816                                 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
 817                                                         ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
 818                                 if(!abuf) goto err;
 819                                 EVP_SignUpdate(&ctx_tmp,abuf,alen);
 820                                 OPENSSL_free(abuf);
 821                                 }
 822
 823 #ifndef OPENSSL_NO_DSA
 824                         if (si->pkey->type == EVP_PKEY_DSA)
 825                                 ctx_tmp.digest=EVP_dss1();
 826 #endif
 827 #ifndef OPENSSL_NO_ECDSA
 828                         if (si->pkey->type == EVP_PKEY_EC)
 829                                 ctx_tmp.digest=EVP_ecdsa();
 830 #endif
 831
 832                         if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
 833                                 (unsigned int *)&buf->length,si->pkey))
 834                                 {
 835                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
 836                                 goto err;
 837                                 }
 838                         if (!ASN1_STRING_set(si->enc_digest,
 839                                 (unsigned char *)buf->data,buf->length))
 840                                 {
 841                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
 842                                 goto err;
 843                                 }
 844                         }
 845                 }
 846         else if (i == NID_pkcs7_digest)
 847                 {
 848                 unsigned char md_data[EVP_MAX_MD_SIZE];
 849                 unsigned int md_len;
 850                 if (!PKCS7_find_digest(&mdc, bio,
 851                                 OBJ_obj2nid(p7->d.digest->md->algorithm)))
 852                         goto err;
 853                 EVP_DigestFinal_ex(mdc,md_data,&md_len);
 854                 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
 855                 }
 856
 857         if (!PKCS7_is_detached(p7)) {
 858                 /*
 859                  * NOTE(emilia): I think we only reach os == NULL here because detached
 860                  * digested data support is broken.
 861                  */
 862                 if (os == NULL)
 863                         goto err;
 864                 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
 865                 if (btmp == NULL)
 866                         {
 867                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
 868                         goto err;
 869                         }
 870                 BIO_get_mem_ptr(btmp,&buf_mem);
 871                 /* Mark the BIO read only then we can use its copy of the data
 872                  * instead of making an extra copy.
 873                  */
 874                 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
 875                 BIO_set_mem_eof_return(btmp, 0);
 876                 os->data = (unsigned char *)buf_mem->data;
 877                 os->length = buf_mem->length;
 878 #if 0
 879                 M_ASN1_OCTET_STRING_set(os,
 880                         (unsigned char *)buf_mem->data,buf_mem->length);
 881 #endif
 882                 }
 883         ret=1;
 884 err:
 885         EVP_MD_CTX_cleanup(&ctx_tmp);
 886         if (buf != NULL) BUF_MEM_free(buf);
 887         return(ret);
 888         }
 889
 890 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
 891              PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 892         {
 893         PKCS7_ISSUER_AND_SERIAL *ias;
 894         int ret=0,i;
 895         STACK_OF(X509) *cert;
 896         X509 *x509;
 897
 898         if (p7 == NULL) {
 899                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
 900                 return 0;
 901         }
 902
 903         if (p7->d.ptr == NULL) {
 904                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
 905                 return 0;
 906         }
 907
 908         if (PKCS7_type_is_signed(p7))
 909                 {
 910                 cert=p7->d.sign->cert;
 911                 }
 912         else if (PKCS7_type_is_signedAndEnveloped(p7))
 913                 {
 914                 cert=p7->d.signed_and_enveloped->cert;
 915                 }
 916         else
 917                 {
 918                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
 919                 goto err;
 920                 }
 921         /* XXXXXXXXXXXXXXXXXXXXXXX */
 922         ias=si->issuer_and_serial;
 923
 924         x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
 925
 926         /* were we able to find the cert in passed to us */
 927         if (x509 == NULL)
 928                 {
 929                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
 930                 goto err;
 931                 }
 932
 933         /* Lets verify */
 934         if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
 935                 {
 936                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 937                 goto err;
 938                 }
 939         X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
 940         i=X509_verify_cert(ctx);
 941         if (i <= 0)
 942                 {
 943                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 944                 X509_STORE_CTX_cleanup(ctx);
 945                 goto err;
 946                 }
 947         X509_STORE_CTX_cleanup(ctx);
 948
 949         return PKCS7_signatureVerify(bio, p7, si, x509);
 950         err:
 951         return ret;
 952         }
 953
 954 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
 955                                                                 X509 *x509)
 956         {
 957         ASN1_OCTET_STRING *os;
 958         EVP_MD_CTX mdc_tmp,*mdc;
 959         int ret=0,i;
 960         int md_type;
 961         STACK_OF(X509_ATTRIBUTE) *sk;
 962         BIO *btmp;
 963         EVP_PKEY *pkey;
 964
 965         EVP_MD_CTX_init(&mdc_tmp);
 966
 967         if (!PKCS7_type_is_signed(p7) &&
 968                                 !PKCS7_type_is_signedAndEnveloped(p7)) {
 969                 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 970                                                 PKCS7_R_WRONG_PKCS7_TYPE);
 971                 goto err;
 972         }
 973
 974         md_type=OBJ_obj2nid(si->digest_alg->algorithm);
 975
 976         btmp=bio;
 977         for (;;)
 978                 {
 979                 if ((btmp == NULL) ||
 980                         ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
 981                         {
 982                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 983                                         PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 984                         goto err;
 985                         }
 986                 BIO_get_md_ctx(btmp,&mdc);
 987                 if (mdc == NULL)
 988                         {
 989                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 990                                                         ERR_R_INTERNAL_ERROR);
 991                         goto err;
 992                         }
 993                 if (EVP_MD_CTX_type(mdc) == md_type)
 994                         break;
 995                 /* Workaround for some broken clients that put the signature
 996                  * OID instead of the digest OID in digest_alg->algorithm
 997                  */
 998                 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
 999                         break;
1000                 btmp=BIO_next(btmp);
1001                 }
1002
1003         /* mdc is the digest ctx that we want, unless there are attributes,
1004          * in which case the digest is the signed attributes */
1005         EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
1006
1007         sk=si->auth_attr;
1008         if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1009                 {
1010                 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1011                 unsigned int md_len, alen;
1012                 ASN1_OCTET_STRING *message_digest;
1013
1014                 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
1015                 message_digest=PKCS7_digest_from_attributes(sk);
1016                 if (!message_digest)
1017                         {
1018                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1019                                         PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1020                         goto err;
1021                         }
1022                 if ((message_digest->length != (int)md_len) ||
1023                         (memcmp(message_digest->data,md_dat,md_len)))
1024                         {
1025 #if 0
1026 {
1027 int ii;
1028 for (ii=0; ii<message_digest->length; ii++)
1029         printf("%02X",message_digest->data[ii]); printf(" sent\n");
1030 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1031 }
1032 #endif
1033                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1034                                                         PKCS7_R_DIGEST_FAILURE);
1035                         ret= -1;
1036                         goto err;
1037                         }
1038
1039                 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
1040
1041                 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1042                                                 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1043                 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
1044
1045                 OPENSSL_free(abuf);
1046                 }
1047
1048         os=si->enc_digest;
1049         pkey = X509_get_pubkey(x509);
1050         if (!pkey)
1051                 {
1052                 ret = -1;
1053                 goto err;
1054                 }
1055 #ifndef OPENSSL_NO_DSA
1056         if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
1057 #endif
1058 #ifndef OPENSSL_NO_ECDSA
1059         if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
1060 #endif
1061
1062         i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1063         EVP_PKEY_free(pkey);
1064         if (i <= 0)
1065                 {
1066                 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1067                                                 PKCS7_R_SIGNATURE_FAILURE);
1068                 ret= -1;
1069                 goto err;
1070                 }
1071         else
1072                 ret=1;
1073 err:
1074         EVP_MD_CTX_cleanup(&mdc_tmp);
1075         return(ret);
1076         }
1077
1078 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1079         {
1080         STACK_OF(PKCS7_RECIP_INFO) *rsk;
1081         PKCS7_RECIP_INFO *ri;
1082         int i;
1083
1084         i=OBJ_obj2nid(p7->type);
1085         if (i != NID_pkcs7_signedAndEnveloped)
1086                 return NULL;
1087         if (p7->d.signed_and_enveloped == NULL)
1088                 return NULL;
1089         rsk=p7->d.signed_and_enveloped->recipientinfo;
1090         if (rsk == NULL)
1091                 return NULL;
1092         ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1093         if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1094         ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1095         return(ri->issuer_and_serial);
1096         }
1097
1098 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1099         {
1100         return(get_attribute(si->auth_attr,nid));
1101         }
1102
1103 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1104         {
1105         return(get_attribute(si->unauth_attr,nid));
1106         }
1107
1108 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1109         {
1110         int i;
1111         X509_ATTRIBUTE *xa;
1112         ASN1_OBJECT *o;
1113
1114         o=OBJ_nid2obj(nid);
1115         if (!o || !sk) return(NULL);
1116         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1117                 {
1118                 xa=sk_X509_ATTRIBUTE_value(sk,i);
1119                 if (OBJ_cmp(xa->object,o) == 0)
1120                         {
1121                         if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1122                                 return(sk_ASN1_TYPE_value(xa->value.set,0));
1123                         else
1124                                 return(NULL);
1125                         }
1126                 }
1127         return(NULL);
1128         }
1129
1130 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1131 {
1132         ASN1_TYPE *astype;
1133         if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1134         return astype->value.octet_string;
1135 }
1136
1137 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1138                                 STACK_OF(X509_ATTRIBUTE) *sk)
1139         {
1140         int i;
1141
1142         if (p7si->auth_attr != NULL)
1143                 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1144         p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1145         if (p7si->auth_attr == NULL)
1146                 return 0;
1147         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1148                 {
1149                 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1150                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1151                     == NULL)
1152                         return(0);
1153                 }
1154         return(1);
1155         }
1156
1157 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1158         {
1159         int i;
1160
1161         if (p7si->unauth_attr != NULL)
1162                 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1163                                            X509_ATTRIBUTE_free);
1164         p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1165         if (p7si->unauth_attr == NULL)
1166                 return 0;
1167         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1168                 {
1169                 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1170                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1171                     == NULL)
1172                         return(0);
1173                 }
1174         return(1);
1175         }
1176
1177 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1178              void *value)
1179         {
1180         return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1181         }
1182
1183 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1184              void *value)
1185         {
1186         return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1187         }
1188
1189 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1190                          void *value)
1191         {
1192         X509_ATTRIBUTE *attr=NULL;
1193
1194         if (*sk == NULL)
1195                 {
1196                 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1197                         return 0;
1198 new_attrib:
1199                 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1200                         return 0;
1201                 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1202                         {
1203                         X509_ATTRIBUTE_free(attr);
1204                         return 0;
1205                         }
1206                 }
1207         else
1208                 {
1209                 int i;
1210
1211                 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1212                         {
1213                         attr=sk_X509_ATTRIBUTE_value(*sk,i);
1214                         if (OBJ_obj2nid(attr->object) == nid)
1215                                 {
1216                                 X509_ATTRIBUTE_free(attr);
1217                                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1218                                 if (attr == NULL)
1219                                         return 0;
1220                                 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1221                                         {
1222                                         X509_ATTRIBUTE_free(attr);
1223                                         return 0;
1224                                         }
1225                                 goto end;
1226                                 }
1227                         }
1228                 goto new_attrib;
1229                 }
1230 end:
1231         return(1);
1232         }
1233