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 "rand.h"
  62 #include "objects.h"
  63 #include "x509.h"
  64
  65 static int add_attribute(STACK **sk, int nid, int atrtype, char *value);
  66 static ASN1_TYPE *get_attribute(STACK *sk, int nid);
  67
  68 #if 1
  69 BIO *PKCS7_dataInit(p7,bio)
  70 PKCS7 *p7;
  71 BIO *bio;
  72         {
  73         int i,j;
  74         BIO *out=NULL,*btmp=NULL;
  75         X509_ALGOR *xa;
  76         EVP_MD *evp_md;
  77         EVP_CIPHER *evp_cipher=NULL;
  78         STACK *md_sk=NULL,*rsk=NULL;
  79         X509_ALGOR *xalg=NULL;
  80         PKCS7_RECIP_INFO *ri=NULL;
  81         EVP_PKEY *pkey;
  82
  83         i=OBJ_obj2nid(p7->type);
  84         p7->state=PKCS7_S_HEADER;
  85
  86         switch (i)
  87                 {
  88         case NID_pkcs7_signed:
  89                 md_sk=p7->d.sign->md_algs;
  90                 break;
  91         case NID_pkcs7_signedAndEnveloped:
  92                 rsk=p7->d.signed_and_enveloped->recipientinfo;
  93                 md_sk=p7->d.signed_and_enveloped->md_algs;
  94                 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.signed_and_enveloped->enc_data->algorithm->algorithm)));
  95                 if (evp_cipher == NULL)
  96                         {
  97                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
  98                         goto err;
  99                         }
 100                 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
 101                 break;
 102         case NID_pkcs7_enveloped:
 103                 rsk=p7->d.enveloped->recipientinfo;
 104                 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.enveloped->enc_data->algorithm->algorithm)));
 105                 if (evp_cipher == NULL)
 106                         {
 107                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 108                         goto err;
 109                         }
 110                 xalg=p7->d.enveloped->enc_data->algorithm;
 111                 break;
 112         default:
 113                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 114                 goto err;
 115                 }
 116
 117         if (md_sk != NULL)
 118                 {
 119                 for (i=0; i<sk_num(md_sk); i++)
 120                         {
 121                         xa=(X509_ALGOR *)sk_value(md_sk,i);
 122                         if ((btmp=BIO_new(BIO_f_md())) == NULL)
 123                                 {
 124                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
 125                                 goto err;
 126                                 }
 127
 128                         j=OBJ_obj2nid(xa->algorithm);
 129                         evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
 130                         if (evp_md == NULL)
 131                                 {
 132                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
 133                                 goto err;
 134                                 }
 135
 136                         BIO_set_md(btmp,evp_md);
 137                         if (out == NULL)
 138                                 out=btmp;
 139                         else
 140                                 BIO_push(out,btmp);
 141                         btmp=NULL;
 142                         }
 143                 }
 144
 145         if (evp_cipher != NULL)
 146                 {
 147                 unsigned char key[EVP_MAX_KEY_LENGTH];
 148                 unsigned char iv[EVP_MAX_IV_LENGTH];
 149                 int keylen,ivlen;
 150                 int jj,max;
 151                 unsigned char *tmp;
 152
 153                 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
 154                         {
 155                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
 156                         goto err;
 157                         }
 158                 keylen=EVP_CIPHER_key_length(evp_cipher);
 159                 ivlen=EVP_CIPHER_iv_length(evp_cipher);
 160
 161                 if (ivlen > 0)
 162                         {
 163                         ASN1_OCTET_STRING *os;
 164
 165                         RAND_bytes(iv,ivlen);
 166                         os=ASN1_OCTET_STRING_new();
 167                         ASN1_OCTET_STRING_set(os,iv,ivlen);
 168 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX this needs to change */
 169                         if (xalg->parameter == NULL)
 170                                 xalg->parameter=ASN1_TYPE_new();
 171                         ASN1_TYPE_set(xalg->parameter,V_ASN1_OCTET_STRING,
 172                                 (char *)os);
 173                         }
 174                 RAND_bytes(key,keylen);
 175
 176                 /* Lets do the pub key stuff :-) */
 177                 max=0;
 178                 for (i=0; i<sk_num(rsk); i++)
 179                         {
 180                         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
 181                         if (ri->cert == NULL)
 182                                 {
 183                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
 184                                 goto err;
 185                                 }
 186                         pkey=X509_get_pubkey(ri->cert);
 187                         jj=EVP_PKEY_size(pkey);
 188                         if (max < jj) max=jj;
 189                         }
 190                 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
 191                         {
 192                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
 193                         goto err;
 194                         }
 195                 for (i=0; i<sk_num(rsk); i++)
 196                         {
 197                         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
 198                         pkey=X509_get_pubkey(ri->cert);
 199                         jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
 200                         if (jj <= 0)
 201                                 {
 202                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
 203                                 Free(tmp);
 204                                 goto err;
 205                                 }
 206                         ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
 207                         }
 208                 Free(tmp);
 209
 210                 BIO_set_cipher(btmp,evp_cipher,key,iv,1);
 211
 212                 if (out == NULL)
 213                         out=btmp;
 214                 else
 215                         BIO_push(out,btmp);
 216                 btmp=NULL;
 217                 }
 218
 219         if (bio == NULL) /* ??????????? */
 220                 {
 221                 if (p7->detached)
 222                         bio=BIO_new(BIO_s_null());
 223                 else
 224                         {
 225                         bio=BIO_new(BIO_s_mem());
 226                         /* We need to set this so that when we have read all
 227                          * the data, the encrypt BIO, if present, will read
 228                          * EOF and encode the last few bytes */
 229                         BIO_set_mem_eof_return(bio,0);
 230
 231                         if (PKCS7_type_is_signed(p7) &&
 232                                 PKCS7_type_is_data(p7->d.sign->contents))
 233                                 {
 234                                 ASN1_OCTET_STRING *os;
 235
 236                                 os=p7->d.sign->contents->d.data;
 237                                 if (os->length > 0)
 238                                         BIO_write(bio,(char *)os->data,
 239                                                 os->length);
 240                                 }
 241                         }
 242                 }
 243         BIO_push(out,bio);
 244         bio=NULL;
 245         if (0)
 246                 {
 247 err:
 248                 if (out != NULL)
 249                         BIO_free_all(out);
 250                 if (btmp != NULL)
 251                         BIO_free_all(btmp);
 252                 out=NULL;
 253                 }
 254         return(out);
 255         }
 256
 257 /* int */
 258 BIO *PKCS7_dataDecode(p7,pkey,in_bio,xs)
 259 PKCS7 *p7;
 260 EVP_PKEY *pkey;
 261 BIO *in_bio;
 262 X509_STORE *xs;
 263         {
 264         int i,j;
 265         BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
 266         char *tmp=NULL;
 267         X509_ALGOR *xa;
 268         ASN1_OCTET_STRING *data_body=NULL;
 269         EVP_MD *evp_md;
 270         EVP_CIPHER *evp_cipher=NULL;
 271         EVP_CIPHER_CTX *evp_ctx=NULL;
 272         X509_ALGOR *enc_alg=NULL;
 273         STACK *md_sk=NULL,*rsk=NULL;
 274         X509_ALGOR *xalg=NULL;
 275         PKCS7_RECIP_INFO *ri=NULL;
 276 /*      EVP_PKEY *pkey; */
 277 #if 0
 278         X509_STORE_CTX s_ctx;
 279 #endif
 280
 281         i=OBJ_obj2nid(p7->type);
 282         p7->state=PKCS7_S_HEADER;
 283
 284         switch (i)
 285                 {
 286         case NID_pkcs7_signed:
 287                 data_body=p7->d.sign->contents->d.data;
 288                 md_sk=p7->d.sign->md_algs;
 289                 break;
 290         case NID_pkcs7_signedAndEnveloped:
 291                 rsk=p7->d.signed_and_enveloped->recipientinfo;
 292                 md_sk=p7->d.signed_and_enveloped->md_algs;
 293                 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
 294                 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
 295                 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
 296                 if (evp_cipher == NULL)
 297                         {
 298                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 299                         goto err;
 300                         }
 301                 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
 302                 break;
 303         case NID_pkcs7_enveloped:
 304                 rsk=p7->d.enveloped->recipientinfo;
 305                 enc_alg=p7->d.enveloped->enc_data->algorithm;
 306                 data_body=p7->d.enveloped->enc_data->enc_data;
 307                 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
 308                 if (evp_cipher == NULL)
 309                         {
 310                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 311                         goto err;
 312                         }
 313                 xalg=p7->d.enveloped->enc_data->algorithm;
 314                 break;
 315         default:
 316                 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 317                 goto err;
 318                 }
 319
 320         /* We will be checking the signature */
 321         if (md_sk != NULL)
 322                 {
 323                 for (i=0; i<sk_num(md_sk); i++)
 324                         {
 325                         xa=(X509_ALGOR *)sk_value(md_sk,i);
 326                         if ((btmp=BIO_new(BIO_f_md())) == NULL)
 327                                 {
 328                                 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
 329                                 goto err;
 330                                 }
 331
 332                         j=OBJ_obj2nid(xa->algorithm);
 333                         evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
 334                         if (evp_md == NULL)
 335                                 {
 336                                 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
 337                                 goto err;
 338                                 }
 339
 340                         BIO_set_md(btmp,evp_md);
 341                         if (out == NULL)
 342                                 out=btmp;
 343                         else
 344                                 BIO_push(out,btmp);
 345                         btmp=NULL;
 346                         }
 347                 }
 348
 349         if (evp_cipher != NULL)
 350                 {
 351 #if 0
 352                 unsigned char key[EVP_MAX_KEY_LENGTH];
 353                 unsigned char iv[EVP_MAX_IV_LENGTH];
 354                 unsigned char *p;
 355                 int keylen,ivlen;
 356                 int max;
 357                 X509_OBJECT ret;
 358 #endif
 359                 int jj;
 360
 361                 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
 362                         {
 363                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
 364                         goto err;
 365                         }
 366
 367                 /* It was encrypted, we need to decrypt the secret key
 368                  * with the private key */
 369
 370                 /* We need to find a private key for one of the people in the
 371                  * recipentinfo list */
 372                 if (rsk == NULL)
 373                         return(NULL);
 374
 375                 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
 376 #if 0
 377                 X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
 378                 for (i=0; i<sk_num(rsk); i++)
 379                         {
 380                         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
 381                         uf (X509_STORE_get_by_issuer_serial(&s_ctx,
 382                                 X509_LU_PKEY,
 383                                 ri->issuer_and_serial->issuer,
 384                                 ri->issuer_and_serial->serial,
 385                                 &ret))
 386                                 break;
 387                         ri=NULL;
 388                         }
 389                 if (ri == NULL) return(NULL);
 390                 pkey=ret.data.pkey;
 391 #endif
 392                 if (pkey == NULL)
 393                         {
 394                         return(NULL);
 395                         }
 396
 397                 jj=EVP_PKEY_size(pkey);
 398                 tmp=Malloc(jj+10);
 399                 if (tmp == NULL)
 400                         {
 401                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
 402                         goto err;
 403                         }
 404
 405                 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
 406                         ASN1_STRING_data(ri->enc_key),
 407                         ASN1_STRING_length(ri->enc_key),
 408                         pkey);
 409                 if (jj <= 0)
 410                         {
 411                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
 412                         goto err;
 413                         }
 414
 415                 evp_ctx=NULL;
 416                 BIO_get_cipher_ctx(etmp,&evp_ctx);
 417                 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
 418                 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
 419                         return(NULL);
 420
 421                 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
 422                         {
 423                         PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
 424                         goto err;
 425                         }
 426                 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
 427
 428                 memset(tmp,0,jj);
 429
 430                 if (out == NULL)
 431                         out=etmp;
 432                 else
 433                         BIO_push(out,etmp);
 434                 etmp=NULL;
 435                 }
 436
 437 #if 1
 438         if (p7->detached || (in_bio != NULL))
 439                 {
 440                 bio=in_bio;
 441                 }
 442         else
 443                 {
 444                 bio=BIO_new(BIO_s_mem());
 445                 /* We need to set this so that when we have read all
 446                  * the data, the encrypt BIO, if present, will read
 447                  * EOF and encode the last few bytes */
 448                 BIO_set_mem_eof_return(bio,0);
 449
 450                 if (data_body->length > 0)
 451                         BIO_write(bio,(char *)data_body->data,data_body->length);
 452                 }
 453         BIO_push(out,bio);
 454         bio=NULL;
 455 #endif
 456         if (0)
 457                 {
 458 err:
 459                 if (out != NULL) BIO_free_all(out);
 460                 if (btmp != NULL) BIO_free_all(btmp);
 461                 if (etmp != NULL) BIO_free_all(etmp);
 462                 if (bio != NULL) BIO_free_all(bio);
 463                 out=NULL;
 464                 }
 465         if (tmp != NULL)
 466                 Free(tmp);
 467         return(out);
 468         }
 469 #endif
 470
 471 int PKCS7_dataFinal(p7,bio)
 472 PKCS7 *p7;
 473 BIO *bio;
 474         {
 475         int ret=0;
 476         int i,j;
 477         BIO *btmp;
 478         BUF_MEM *buf_mem=NULL;
 479         BUF_MEM *buf=NULL;
 480         PKCS7_SIGNER_INFO *si;
 481         EVP_MD_CTX *mdc,ctx_tmp;
 482         STACK *sk,*si_sk=NULL;
 483         unsigned char *p,*pp=NULL;
 484         int x;
 485         ASN1_OCTET_STRING *os=NULL;
 486
 487         i=OBJ_obj2nid(p7->type);
 488         p7->state=PKCS7_S_HEADER;
 489
 490         switch (i)
 491                 {
 492         case NID_pkcs7_signedAndEnveloped:
 493                 /* XXXXXXXXXXXXXXXX */
 494                 si_sk=p7->d.signed_and_enveloped->signer_info;
 495                 os=ASN1_OCTET_STRING_new();
 496                 p7->d.signed_and_enveloped->enc_data->enc_data=os;
 497                 break;
 498         case NID_pkcs7_enveloped:
 499                 /* XXXXXXXXXXXXXXXX */
 500                 os=ASN1_OCTET_STRING_new();
 501                 p7->d.enveloped->enc_data->enc_data=os;
 502                 break;
 503         case NID_pkcs7_signed:
 504                 si_sk=p7->d.sign->signer_info;
 505                 os=p7->d.sign->contents->d.data;
 506                 break;
 507                 }
 508
 509         if (si_sk != NULL)
 510                 {
 511                 if ((buf=BUF_MEM_new()) == NULL)
 512                         {
 513                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
 514                         goto err;
 515                         }
 516                 for (i=0; i<sk_num(si_sk); i++)
 517                         {
 518                         si=(PKCS7_SIGNER_INFO *)
 519                                 sk_value(si_sk,i);
 520                         if (si->pkey == NULL) continue;
 521
 522                         j=OBJ_obj2nid(si->digest_alg->algorithm);
 523
 524                         btmp=bio;
 525                         for (;;)
 526                                 {
 527                                 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
 528                                         == NULL)
 529                                         {
 530                                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 531                                         goto err;
 532                                         }
 533                                 BIO_get_md_ctx(btmp,&mdc);
 534                                 if (mdc == NULL)
 535                                         {
 536                                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
 537                                         goto err;
 538                                         }
 539                                 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
 540                                         break;
 541                                 else
 542                                         btmp=btmp->next_bio;
 543                                 }
 544
 545                         /* We now have the EVP_MD_CTX, lets do the
 546                          * signing. */
 547                         memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
 548                         if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
 549                                 {
 550                                 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
 551                                 goto err;
 552                                 }
 553
 554                         sk=si->auth_attr;
 555
 556                         /* If there are attributes, we add the digest
 557                          * attribute and only sign the attributes */
 558                         if ((sk != NULL) && (sk_num(sk) != 0))
 559                                 {
 560                                 unsigned char md_data[EVP_MAX_MD_SIZE];
 561                                 unsigned int md_len;
 562                                 ASN1_OCTET_STRING *digest;
 563                                 ASN1_UTCTIME *sign_time;
 564                                 EVP_MD *md_tmp;
 565
 566                                 /* Add signing time */
 567                                 sign_time=X509_gmtime_adj(NULL,0);
 568                                 PKCS7_add_signed_attribute(si,
 569                                         NID_pkcs9_signingTime,
 570                                         V_ASN1_UTCTIME,(char *)sign_time);
 571
 572                                 /* Add digest */
 573                                 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
 574                                 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
 575                                 digest=ASN1_OCTET_STRING_new();
 576                                 ASN1_OCTET_STRING_set(digest,md_data,md_len);
 577                                 PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest,
 578                                         V_ASN1_OCTET_STRING,(char *)digest);
 579
 580                                 /* Now sign the mess */
 581                                 EVP_SignInit(&ctx_tmp,md_tmp);
 582                                 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
 583                                         V_ASN1_SET,V_ASN1_UNIVERSAL);
 584                                 pp=(unsigned char *)Malloc(x);
 585                                 p=pp;
 586                                 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
 587                                         V_ASN1_SET,V_ASN1_UNIVERSAL);
 588                                 EVP_SignUpdate(&ctx_tmp,pp,x);
 589                                 Free(pp);
 590                                 pp=NULL;
 591                                 }
 592
 593                         if (si->pkey->type == EVP_PKEY_DSA)
 594                                 ctx_tmp.digest=EVP_dss1();
 595
 596                         if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
 597                                 (unsigned int *)&buf->length,si->pkey))
 598                                 {
 599                                 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
 600                                 goto err;
 601                                 }
 602                         if (!ASN1_STRING_set(si->enc_digest,
 603                                 (unsigned char *)buf->data,buf->length))
 604                                 {
 605                                 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
 606                                 goto err;
 607                                 }
 608                         }
 609                 }
 610
 611         if (p7->detached)
 612                 ASN1_OCTET_STRING_set(os,(unsigned char *)"",0);
 613         else
 614                 {
 615                 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
 616                 if (btmp == NULL)
 617                         {
 618                         PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
 619                         goto err;
 620                         }
 621                 BIO_get_mem_ptr(btmp,&buf_mem);
 622                 ASN1_OCTET_STRING_set(os,
 623                         (unsigned char *)buf_mem->data,buf_mem->length);
 624                 }
 625         if (pp != NULL) Free(pp);
 626         pp=NULL;
 627
 628         ret=1;
 629 err:
 630         if (buf != NULL) BUF_MEM_free(buf);
 631         return(ret);
 632         }
 633
 634 int PKCS7_dataVerify(cert_store,ctx,bio,p7,si)
 635 X509_STORE *cert_store;
 636 X509_STORE_CTX *ctx;
 637 BIO *bio;
 638 PKCS7 *p7;
 639 PKCS7_SIGNER_INFO *si;
 640         {
 641 /*      PKCS7_SIGNED *s; */
 642         ASN1_OCTET_STRING *os;
 643         EVP_MD_CTX mdc_tmp,*mdc;
 644         unsigned char *pp,*p;
 645         PKCS7_ISSUER_AND_SERIAL *ias;
 646         int ret=0,i;
 647         int md_type;
 648         STACK *sk,*cert;
 649         BIO *btmp;
 650         X509 *x509;
 651
 652         if (PKCS7_type_is_signed(p7))
 653                 {
 654                 cert=p7->d.sign->cert;
 655                 }
 656         else if (PKCS7_type_is_signedAndEnveloped(p7))
 657                 {
 658                 cert=p7->d.signed_and_enveloped->cert;
 659                 }
 660         else
 661                 {
 662                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
 663                 goto err;
 664                 }
 665         /* XXXXXXXXXXXXXXXXXXXXXXX */
 666         ias=si->issuer_and_serial;
 667
 668         x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
 669
 670         /* were we able to find the cert in passed to us */
 671         if (x509 == NULL)
 672                 {
 673                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
 674                 goto err;
 675                 }
 676
 677         /* Lets verify */
 678         X509_STORE_CTX_init(ctx,cert_store,x509,cert);
 679         i=X509_verify_cert(ctx);
 680         if (i <= 0)
 681                 {
 682                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 683                 goto err;
 684                 }
 685         X509_STORE_CTX_cleanup(ctx);
 686
 687         /* So we like 'x509', lets check the signature. */
 688         md_type=OBJ_obj2nid(si->digest_alg->algorithm);
 689
 690         btmp=bio;
 691         for (;;)
 692                 {
 693                 if ((btmp == NULL) ||
 694                         ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
 695                         {
 696                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 697                         goto err;
 698                         }
 699                 BIO_get_md_ctx(btmp,&mdc);
 700                 if (mdc == NULL)
 701                         {
 702                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
 703                         goto err;
 704                         }
 705                 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
 706                         break;
 707                 btmp=btmp->next_bio;
 708                 }
 709
 710         /* mdc is the digest ctx that we want, unless there are attributes,
 711          * in which case the digest is the signed attributes */
 712         memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
 713
 714         sk=si->auth_attr;
 715         if ((sk != NULL) && (sk_num(sk) != 0))
 716                 {
 717                 unsigned char md_dat[EVP_MAX_MD_SIZE];
 718                 int md_len;
 719                 ASN1_OCTET_STRING *message_digest;
 720
 721                 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
 722                 message_digest=PKCS7_digest_from_attributes(sk);
 723                 if (!message_digest)
 724                         {
 725                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 726                         goto err;
 727                         }
 728                 if ((message_digest->length != md_len) ||
 729                         (memcmp(message_digest->data,md_dat,md_len)))
 730                         {
 731 #if 0
 732 {
 733 int ii;
 734 for (ii=0; ii<message_digest->length; ii++)
 735         printf("%02X",message_digest->data[ii]); printf(" sent\n");
 736 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
 737 }
 738 #endif
 739                         PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
 740                         ret= -1;
 741                         goto err;
 742                         }
 743
 744                 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
 745                 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
 746                         V_ASN1_SET,V_ASN1_UNIVERSAL);
 747                 pp=(unsigned char *)Malloc(i);
 748                 p=pp;
 749                 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
 750                         V_ASN1_SET,V_ASN1_UNIVERSAL);
 751                 EVP_VerifyUpdate(&mdc_tmp,pp,i);
 752                 Free(pp);
 753                 }
 754
 755         os=si->enc_digest;
 756         if (X509_get_pubkey(x509)->type == EVP_PKEY_DSA)
 757                 mdc_tmp.digest=EVP_dss1();
 758
 759         i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length,
 760                 X509_get_pubkey(x509));
 761         if (i <= 0)
 762                 {
 763                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
 764                 ret= -1;
 765                 goto err;
 766                 }
 767         else
 768                 ret=1;
 769 err:
 770         return(ret);
 771         }
 772
 773 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(p7,idx)
 774 PKCS7 *p7;
 775 int idx;
 776         {
 777         STACK *rsk;
 778         PKCS7_RECIP_INFO *ri;
 779         int i;
 780
 781         i=OBJ_obj2nid(p7->type);
 782         if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
 783         rsk=p7->d.signed_and_enveloped->recipientinfo;
 784         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
 785         if (sk_num(rsk) <= idx) return(NULL);
 786         ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
 787         return(ri->issuer_and_serial);
 788         }
 789
 790 ASN1_TYPE *PKCS7_get_signed_attribute(si,nid)
 791 PKCS7_SIGNER_INFO *si;
 792 int nid;
 793         {
 794         return(get_attribute(si->auth_attr,nid));
 795         }
 796
 797 ASN1_TYPE *PKCS7_get_attribute(si,nid)
 798 PKCS7_SIGNER_INFO *si;
 799 int nid;
 800         {
 801         return(get_attribute(si->unauth_attr,nid));
 802         }
 803
 804 static ASN1_TYPE *get_attribute(sk,nid)
 805 STACK *sk;
 806 int nid;
 807         {
 808         int i;
 809         X509_ATTRIBUTE *xa;
 810         ASN1_OBJECT *o;
 811
 812         o=OBJ_nid2obj(nid);
 813         if (o == NULL) return(NULL);
 814         for (i=0; i<sk_num(sk); i++)
 815                 {
 816                 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
 817                 if (OBJ_cmp(xa->object,o) == 0)
 818                         {
 819                         if (xa->set && sk_num(xa->value.set))
 820                                 return((ASN1_TYPE *)sk_value(xa->value.set,0));
 821                         else
 822                                 return(NULL);
 823                         }
 824                 }
 825         return(NULL);
 826         }
 827
 828 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(sk)
 829 STACK *sk;
 830         {
 831         X509_ATTRIBUTE *attr;
 832         ASN1_TYPE *astype;
 833         int i;
 834         if (!sk || !sk_num(sk)) return NULL;
 835         /* Search the attributes for a digest */
 836         for (i = 0; i < sk_num(sk); i++)
 837                 {
 838                 attr = (X509_ATTRIBUTE *) sk_value(sk, i);
 839                 if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest)
 840                         {
 841                         if (!attr->set) return NULL;
 842                         if (!attr->value.set ||
 843                                  !sk_num (attr->value.set) ) return NULL;
 844                         astype = (ASN1_TYPE *) sk_value(attr->value.set, 0);
 845                         return astype->value.octet_string;
 846                         }
 847                 }
 848         return NULL;
 849         }
 850
 851 int PKCS7_set_signed_attributes(p7si,sk)
 852 PKCS7_SIGNER_INFO *p7si;
 853 STACK *sk;
 854         {
 855         int i;
 856
 857         if (p7si->auth_attr != NULL)
 858                 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
 859         p7si->auth_attr=sk_dup(sk);
 860         for (i=0; i<sk_num(sk); i++)
 861                 {
 862                 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
 863                         (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
 864                         return(0);
 865                 }
 866         return(1);
 867         }
 868
 869 int PKCS7_set_attributes(p7si,sk)
 870 PKCS7_SIGNER_INFO *p7si;
 871 STACK *sk;
 872         {
 873         int i;
 874
 875         if (p7si->unauth_attr != NULL)
 876                 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
 877         p7si->unauth_attr=sk_dup(sk);
 878         for (i=0; i<sk_num(sk); i++)
 879                 {
 880                 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
 881                         (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
 882                         return(0);
 883                 }
 884         return(1);
 885         }
 886
 887 int PKCS7_add_signed_attribute(p7si,nid,atrtype,value)
 888 PKCS7_SIGNER_INFO *p7si;
 889 int nid;
 890 int atrtype;
 891 char *value;
 892         {
 893         return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
 894         }
 895
 896 int PKCS7_add_attribute(p7si,nid,atrtype,value)
 897 PKCS7_SIGNER_INFO *p7si;
 898 int nid;
 899 int atrtype;
 900 char *value;
 901         {
 902         return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
 903         }
 904
 905 static int add_attribute(sk, nid, atrtype, value)
 906 STACK **sk;
 907 int nid;
 908 int atrtype;
 909 char *value;
 910         {
 911         X509_ATTRIBUTE *attr=NULL;
 912         ASN1_TYPE *val=NULL;
 913
 914         if (*sk == NULL)
 915                 {
 916                 *sk = sk_new(NULL);
 917 new_attrib:
 918                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
 919                 sk_push(*sk,(char *)attr);
 920                 }
 921         else
 922                 {
 923                 int i;
 924
 925                 for (i=0; i<sk_num(*sk); i++)
 926                         {
 927                         attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
 928                         if (OBJ_obj2nid(attr->object) == nid)
 929                                 {
 930                                 X509_ATTRIBUTE_free(attr);
 931                                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
 932                                 sk_value(*sk,i)=(char *)attr;
 933                                 goto end;
 934                                 }
 935                         }
 936                 goto new_attrib;
 937                 }
 938 end:
 939         return(1);
 940         }
 941