1 /* crypto/pkcs7/pk7_doit.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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>
67 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
69 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
71 static int PKCS7_type_is_other(PKCS7* p7)
75 int nid=OBJ_obj2nid(p7->type);
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:
95 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
97 if ( PKCS7_type_is_data(p7))
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;
105 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
109 if ((btmp=BIO_new(BIO_f_md())) == NULL)
111 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
115 md=EVP_get_digestbyobj(alg->algorithm);
118 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
125 else if (!BIO_push(*pbio,btmp))
127 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
141 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
142 unsigned char *key, int keylen)
144 EVP_PKEY_CTX *pctx = NULL;
145 EVP_PKEY *pkey = NULL;
146 unsigned char *ek = NULL;
150 pkey = X509_get_pubkey(ri->cert);
155 pctx = EVP_PKEY_CTX_new(pkey, NULL);
159 if (EVP_PKEY_encrypt_init(pctx) <= 0)
162 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
163 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0)
165 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
169 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
172 ek = OPENSSL_malloc(eklen);
176 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
180 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
183 ASN1_STRING_set0(ri->enc_key, ek, eklen);
192 EVP_PKEY_CTX_free(pctx);
200 int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
201 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
203 EVP_PKEY_CTX *pctx = NULL;
204 unsigned char *ek = NULL;
209 pctx = EVP_PKEY_CTX_new(pkey, NULL);
213 if (EVP_PKEY_decrypt_init(pctx) <= 0)
216 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
217 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0)
219 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
223 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
224 ri->enc_key->data, ri->enc_key->length) <= 0)
227 ek = OPENSSL_malloc(eklen);
231 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
235 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
236 ri->enc_key->data, ri->enc_key->length) <= 0)
238 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
249 EVP_PKEY_CTX_free(pctx);
256 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
259 BIO *out=NULL,*btmp=NULL;
260 X509_ALGOR *xa = NULL;
261 const EVP_CIPHER *evp_cipher=NULL;
262 STACK_OF(X509_ALGOR) *md_sk=NULL;
263 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
264 X509_ALGOR *xalg=NULL;
265 PKCS7_RECIP_INFO *ri=NULL;
266 ASN1_OCTET_STRING *os=NULL;
268 i=OBJ_obj2nid(p7->type);
269 p7->state=PKCS7_S_HEADER;
273 case NID_pkcs7_signed:
274 md_sk=p7->d.sign->md_algs;
275 os = PKCS7_get_octet_string(p7->d.sign->contents);
277 case NID_pkcs7_signedAndEnveloped:
278 rsk=p7->d.signed_and_enveloped->recipientinfo;
279 md_sk=p7->d.signed_and_enveloped->md_algs;
280 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
281 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
282 if (evp_cipher == NULL)
284 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
285 PKCS7_R_CIPHER_NOT_INITIALIZED);
289 case NID_pkcs7_enveloped:
290 rsk=p7->d.enveloped->recipientinfo;
291 xalg=p7->d.enveloped->enc_data->algorithm;
292 evp_cipher=p7->d.enveloped->enc_data->cipher;
293 if (evp_cipher == NULL)
295 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
296 PKCS7_R_CIPHER_NOT_INITIALIZED);
300 case NID_pkcs7_digest:
301 xa = p7->d.digest->md;
302 os = PKCS7_get_octet_string(p7->d.digest->contents);
305 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
309 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
310 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
313 if (xa && !PKCS7_bio_add_digest(&out, xa))
316 if (evp_cipher != NULL)
318 unsigned char key[EVP_MAX_KEY_LENGTH];
319 unsigned char iv[EVP_MAX_IV_LENGTH];
323 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
325 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
328 BIO_get_cipher_ctx(btmp, &ctx);
329 keylen=EVP_CIPHER_key_length(evp_cipher);
330 ivlen=EVP_CIPHER_iv_length(evp_cipher);
331 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
332 if (ivlen > 0) RAND_pseudo_bytes(iv,ivlen);
333 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
335 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
337 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
341 if (xalg->parameter == NULL)
342 xalg->parameter=ASN1_TYPE_new();
343 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
347 /* Lets do the pub key stuff :-) */
348 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
350 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
351 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
354 OPENSSL_cleanse(key, keylen);
365 if (PKCS7_is_detached(p7))
366 bio=BIO_new(BIO_s_null());
367 else if (os && os->length > 0)
368 bio = BIO_new_mem_buf(os->data, os->length);
371 bio=BIO_new(BIO_s_mem());
372 BIO_set_mem_eof_return(bio,0);
389 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
392 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
393 pcert->cert_info->issuer);
396 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
397 ri->issuer_and_serial->serial);
401 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
404 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
406 ASN1_OCTET_STRING *data_body=NULL;
407 const EVP_MD *evp_md;
408 const EVP_CIPHER *evp_cipher=NULL;
409 EVP_CIPHER_CTX *evp_ctx=NULL;
410 X509_ALGOR *enc_alg=NULL;
411 STACK_OF(X509_ALGOR) *md_sk=NULL;
412 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
413 X509_ALGOR *xalg=NULL;
414 PKCS7_RECIP_INFO *ri=NULL;
416 i=OBJ_obj2nid(p7->type);
417 p7->state=PKCS7_S_HEADER;
421 case NID_pkcs7_signed:
422 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
423 md_sk=p7->d.sign->md_algs;
425 case NID_pkcs7_signedAndEnveloped:
426 rsk=p7->d.signed_and_enveloped->recipientinfo;
427 md_sk=p7->d.signed_and_enveloped->md_algs;
428 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
429 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
430 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
431 if (evp_cipher == NULL)
433 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
436 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
438 case NID_pkcs7_enveloped:
439 rsk=p7->d.enveloped->recipientinfo;
440 enc_alg=p7->d.enveloped->enc_data->algorithm;
441 data_body=p7->d.enveloped->enc_data->enc_data;
442 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
443 if (evp_cipher == NULL)
445 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
448 xalg=p7->d.enveloped->enc_data->algorithm;
451 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
455 /* We will be checking the signature */
458 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
460 xa=sk_X509_ALGOR_value(md_sk,i);
461 if ((btmp=BIO_new(BIO_f_md())) == NULL)
463 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
467 j=OBJ_obj2nid(xa->algorithm);
468 evp_md=EVP_get_digestbynid(j);
471 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
475 BIO_set_md(btmp,evp_md);
484 if (evp_cipher != NULL)
487 unsigned char key[EVP_MAX_KEY_LENGTH];
488 unsigned char iv[EVP_MAX_IV_LENGTH];
494 unsigned char *ek = NULL;
497 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
499 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
503 /* It was encrypted, we need to decrypt the secret key
504 * with the private key */
506 /* Find the recipientInfo which matches the passed certificate
512 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
514 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
515 if (!pkcs7_cmp_ri(ri, pcert))
521 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
522 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
527 /* If we haven't got a certificate try each ri in turn */
531 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
533 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
534 if (pkcs7_decrypt_rinfo(&ek, &eklen,
542 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
543 PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
549 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) <= 0)
554 BIO_get_cipher_ctx(etmp,&evp_ctx);
555 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
557 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
560 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
561 /* Some S/MIME clients don't use the same key
562 * and effective key length. The key length is
563 * determined by the size of the decrypted RSA key.
565 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen))
567 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
568 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
572 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0)
577 OPENSSL_cleanse(ek,eklen);
589 if (PKCS7_is_detached(p7) || (in_bio != NULL))
596 bio=BIO_new(BIO_s_mem());
597 /* We need to set this so that when we have read all
598 * the data, the encrypt BIO, if present, will read
599 * EOF and encode the last few bytes */
600 BIO_set_mem_eof_return(bio,0);
602 if (data_body->length > 0)
603 BIO_write(bio,(char *)data_body->data,data_body->length);
605 if (data_body->length > 0)
606 bio = BIO_new_mem_buf(data_body->data,data_body->length);
608 bio=BIO_new(BIO_s_mem());
609 BIO_set_mem_eof_return(bio,0);
619 if (out != NULL) BIO_free_all(out);
620 if (btmp != NULL) BIO_free_all(btmp);
621 if (etmp != NULL) BIO_free_all(etmp);
622 if (bio != NULL) BIO_free_all(bio);
628 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
632 bio=BIO_find_type(bio,BIO_TYPE_MD);
635 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
638 BIO_get_md_ctx(bio,pmd);
641 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
644 if (EVP_MD_CTX_type(*pmd) == nid)
651 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
656 BUF_MEM *buf_mem=NULL;
658 PKCS7_SIGNER_INFO *si;
659 EVP_MD_CTX *mdc,ctx_tmp;
660 STACK_OF(X509_ATTRIBUTE) *sk;
661 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
662 ASN1_OCTET_STRING *os=NULL;
664 EVP_MD_CTX_init(&ctx_tmp);
665 i=OBJ_obj2nid(p7->type);
666 p7->state=PKCS7_S_HEADER;
670 case NID_pkcs7_signedAndEnveloped:
671 /* XXXXXXXXXXXXXXXX */
672 si_sk=p7->d.signed_and_enveloped->signer_info;
673 if (!(os=M_ASN1_OCTET_STRING_new()))
675 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
678 p7->d.signed_and_enveloped->enc_data->enc_data=os;
680 case NID_pkcs7_enveloped:
681 /* XXXXXXXXXXXXXXXX */
682 if (!(os=M_ASN1_OCTET_STRING_new()))
684 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
687 p7->d.enveloped->enc_data->enc_data=os;
689 case NID_pkcs7_signed:
690 si_sk=p7->d.sign->signer_info;
691 os=PKCS7_get_octet_string(p7->d.sign->contents);
692 /* If detached data then the content is excluded */
693 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
694 M_ASN1_OCTET_STRING_free(os);
695 p7->d.sign->contents->d.data = NULL;
699 case NID_pkcs7_digest:
700 os=PKCS7_get_octet_string(p7->d.digest->contents);
701 /* If detached data then the content is excluded */
702 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
704 M_ASN1_OCTET_STRING_free(os);
705 p7->d.digest->contents->d.data = NULL;
713 if ((buf=BUF_MEM_new()) == NULL)
715 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
718 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
720 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
721 if (si->pkey == NULL) continue;
723 j=OBJ_obj2nid(si->digest_alg->algorithm);
727 btmp = PKCS7_find_digest(&mdc, btmp, j);
732 /* We now have the EVP_MD_CTX, lets do the
734 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
735 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
737 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
743 /* If there are attributes, we add the digest
744 * attribute and only sign the attributes */
745 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
747 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
748 unsigned int md_len, alen;
749 ASN1_OCTET_STRING *digest;
750 ASN1_UTCTIME *sign_time;
751 const EVP_MD *md_tmp;
753 /* Add signing time if not already present */
754 if (!PKCS7_get_signed_attribute(si,
755 NID_pkcs9_signingTime))
757 if (!(sign_time=X509_gmtime_adj(NULL,0)))
759 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
760 ERR_R_MALLOC_FAILURE);
763 PKCS7_add_signed_attribute(si,
764 NID_pkcs9_signingTime,
765 V_ASN1_UTCTIME,sign_time);
769 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
770 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
771 if (!(digest=M_ASN1_OCTET_STRING_new()))
773 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
774 ERR_R_MALLOC_FAILURE);
777 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
780 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
781 ERR_R_MALLOC_FAILURE);
784 PKCS7_add_signed_attribute(si,
785 NID_pkcs9_messageDigest,
786 V_ASN1_OCTET_STRING,digest);
788 /* Now sign the attributes */
789 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
790 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
791 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
793 EVP_SignUpdate(&ctx_tmp,abuf,alen);
797 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
798 (unsigned int *)&buf->length,si->pkey))
800 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
803 if (!ASN1_STRING_set(si->enc_digest,
804 (unsigned char *)buf->data,buf->length))
806 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
811 else if (i == NID_pkcs7_digest)
813 unsigned char md_data[EVP_MAX_MD_SIZE];
815 if (!PKCS7_find_digest(&mdc, bio,
816 OBJ_obj2nid(p7->d.digest->md->algorithm)))
818 EVP_DigestFinal_ex(mdc,md_data,&md_len);
819 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
822 if (!PKCS7_is_detached(p7))
824 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
827 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
830 BIO_get_mem_ptr(btmp,&buf_mem);
831 /* Mark the BIO read only then we can use its copy of the data
832 * instead of making an extra copy.
834 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
835 BIO_set_mem_eof_return(btmp, 0);
836 os->data = (unsigned char *)buf_mem->data;
837 os->length = buf_mem->length;
839 M_ASN1_OCTET_STRING_set(os,
840 (unsigned char *)buf_mem->data,buf_mem->length);
845 EVP_MD_CTX_cleanup(&ctx_tmp);
846 if (buf != NULL) BUF_MEM_free(buf);
850 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
851 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
853 PKCS7_ISSUER_AND_SERIAL *ias;
855 STACK_OF(X509) *cert;
858 if (PKCS7_type_is_signed(p7))
860 cert=p7->d.sign->cert;
862 else if (PKCS7_type_is_signedAndEnveloped(p7))
864 cert=p7->d.signed_and_enveloped->cert;
868 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
871 /* XXXXXXXXXXXXXXXXXXXXXXX */
872 ias=si->issuer_and_serial;
874 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
876 /* were we able to find the cert in passed to us */
879 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
884 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
886 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
889 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
890 i=X509_verify_cert(ctx);
893 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
894 X509_STORE_CTX_cleanup(ctx);
897 X509_STORE_CTX_cleanup(ctx);
899 return PKCS7_signatureVerify(bio, p7, si, x509);
904 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
907 ASN1_OCTET_STRING *os;
908 EVP_MD_CTX mdc_tmp,*mdc;
911 STACK_OF(X509_ATTRIBUTE) *sk;
915 EVP_MD_CTX_init(&mdc_tmp);
917 if (!PKCS7_type_is_signed(p7) &&
918 !PKCS7_type_is_signedAndEnveloped(p7)) {
919 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
920 PKCS7_R_WRONG_PKCS7_TYPE);
924 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
929 if ((btmp == NULL) ||
930 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
932 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
933 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
936 BIO_get_md_ctx(btmp,&mdc);
939 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
940 ERR_R_INTERNAL_ERROR);
943 if (EVP_MD_CTX_type(mdc) == md_type)
945 /* Workaround for some broken clients that put the signature
946 * OID instead of the digest OID in digest_alg->algorithm
948 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
953 /* mdc is the digest ctx that we want, unless there are attributes,
954 * in which case the digest is the signed attributes */
955 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
958 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
960 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
961 unsigned int md_len, alen;
962 ASN1_OCTET_STRING *message_digest;
964 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
965 message_digest=PKCS7_digest_from_attributes(sk);
968 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
969 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
972 if ((message_digest->length != (int)md_len) ||
973 (memcmp(message_digest->data,md_dat,md_len)))
978 for (ii=0; ii<message_digest->length; ii++)
979 printf("%02X",message_digest->data[ii]); printf(" sent\n");
980 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
983 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
984 PKCS7_R_DIGEST_FAILURE);
989 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
991 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
992 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
993 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
999 pkey = X509_get_pubkey(x509);
1006 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1007 EVP_PKEY_free(pkey);
1010 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1011 PKCS7_R_SIGNATURE_FAILURE);
1018 EVP_MD_CTX_cleanup(&mdc_tmp);
1022 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1024 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1025 PKCS7_RECIP_INFO *ri;
1028 i=OBJ_obj2nid(p7->type);
1029 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
1030 rsk=p7->d.signed_and_enveloped->recipientinfo;
1031 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1032 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1033 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1034 return(ri->issuer_and_serial);
1037 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1039 return(get_attribute(si->auth_attr,nid));
1042 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1044 return(get_attribute(si->unauth_attr,nid));
1047 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1054 if (!o || !sk) return(NULL);
1055 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1057 xa=sk_X509_ATTRIBUTE_value(sk,i);
1058 if (OBJ_cmp(xa->object,o) == 0)
1060 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1061 return(sk_ASN1_TYPE_value(xa->value.set,0));
1069 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1072 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1073 return astype->value.octet_string;
1076 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1077 STACK_OF(X509_ATTRIBUTE) *sk)
1081 if (p7si->auth_attr != NULL)
1082 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1083 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1084 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1086 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1087 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1094 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1098 if (p7si->unauth_attr != NULL)
1099 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1100 X509_ATTRIBUTE_free);
1101 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1102 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1104 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1105 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1112 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1115 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1118 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1121 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1124 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1127 X509_ATTRIBUTE *attr=NULL;
1131 *sk = sk_X509_ATTRIBUTE_new_null();
1133 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1134 sk_X509_ATTRIBUTE_push(*sk,attr);
1140 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1142 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1143 if (OBJ_obj2nid(attr->object) == nid)
1145 X509_ATTRIBUTE_free(attr);
1146 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1147 sk_X509_ATTRIBUTE_set(*sk,i,attr);