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>
66 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
68 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
70 static int PKCS7_type_is_other(PKCS7* p7)
74 int nid=OBJ_obj2nid(p7->type);
79 case NID_pkcs7_signed:
80 case NID_pkcs7_enveloped:
81 case NID_pkcs7_signedAndEnveloped:
82 case NID_pkcs7_digest:
83 case NID_pkcs7_encrypted:
94 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
96 if ( PKCS7_type_is_data(p7))
98 if ( PKCS7_type_is_other(p7) && p7->d.other
99 && (p7->d.other->type == V_ASN1_OCTET_STRING))
100 return p7->d.other->value.octet_string;
104 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
108 if ((btmp=BIO_new(BIO_f_md())) == NULL)
110 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
114 md=EVP_get_digestbyobj(alg->algorithm);
117 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
124 else if (!BIO_push(*pbio,btmp))
126 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
140 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
143 BIO *out=NULL,*btmp=NULL;
144 X509_ALGOR *xa = NULL;
145 const EVP_CIPHER *evp_cipher=NULL;
146 STACK_OF(X509_ALGOR) *md_sk=NULL;
147 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
148 X509_ALGOR *xalg=NULL;
149 PKCS7_RECIP_INFO *ri=NULL;
151 ASN1_OCTET_STRING *os=NULL;
153 i=OBJ_obj2nid(p7->type);
154 p7->state=PKCS7_S_HEADER;
158 case NID_pkcs7_signed:
159 md_sk=p7->d.sign->md_algs;
160 os = PKCS7_get_octet_string(p7->d.sign->contents);
162 case NID_pkcs7_signedAndEnveloped:
163 rsk=p7->d.signed_and_enveloped->recipientinfo;
164 md_sk=p7->d.signed_and_enveloped->md_algs;
165 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
166 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
167 if (evp_cipher == NULL)
169 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
170 PKCS7_R_CIPHER_NOT_INITIALIZED);
174 case NID_pkcs7_enveloped:
175 rsk=p7->d.enveloped->recipientinfo;
176 xalg=p7->d.enveloped->enc_data->algorithm;
177 evp_cipher=p7->d.enveloped->enc_data->cipher;
178 if (evp_cipher == NULL)
180 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
181 PKCS7_R_CIPHER_NOT_INITIALIZED);
185 case NID_pkcs7_digest:
186 xa = p7->d.digest->md;
187 os = PKCS7_get_octet_string(p7->d.digest->contents);
190 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
194 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
195 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
198 if (xa && !PKCS7_bio_add_digest(&out, xa))
201 if (evp_cipher != NULL)
203 unsigned char key[EVP_MAX_KEY_LENGTH];
204 unsigned char iv[EVP_MAX_IV_LENGTH];
210 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
212 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
215 BIO_get_cipher_ctx(btmp, &ctx);
216 keylen=EVP_CIPHER_key_length(evp_cipher);
217 ivlen=EVP_CIPHER_iv_length(evp_cipher);
218 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
219 if (ivlen > 0) RAND_pseudo_bytes(iv,ivlen);
220 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
222 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
224 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
228 if (xalg->parameter == NULL)
229 xalg->parameter=ASN1_TYPE_new();
230 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
234 /* Lets do the pub key stuff :-) */
236 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
238 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
239 if (ri->cert == NULL)
241 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
244 pkey=X509_get_pubkey(ri->cert);
245 jj=EVP_PKEY_size(pkey);
247 if (max < jj) max=jj;
249 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
251 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
254 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
256 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
257 pkey=X509_get_pubkey(ri->cert);
258 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
262 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
266 M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
269 OPENSSL_cleanse(key, keylen);
280 if (PKCS7_is_detached(p7))
281 bio=BIO_new(BIO_s_null());
282 else if (os && os->length > 0)
283 bio = BIO_new_mem_buf(os->data, os->length);
286 bio=BIO_new(BIO_s_mem());
287 BIO_set_mem_eof_return(bio,0);
305 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
308 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
309 unsigned char *tmp=NULL;
311 ASN1_OCTET_STRING *data_body=NULL;
312 const EVP_MD *evp_md;
313 const EVP_CIPHER *evp_cipher=NULL;
314 EVP_CIPHER_CTX *evp_ctx=NULL;
315 X509_ALGOR *enc_alg=NULL;
316 STACK_OF(X509_ALGOR) *md_sk=NULL;
317 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
318 X509_ALGOR *xalg=NULL;
319 PKCS7_RECIP_INFO *ri=NULL;
321 i=OBJ_obj2nid(p7->type);
322 p7->state=PKCS7_S_HEADER;
326 case NID_pkcs7_signed:
327 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
328 md_sk=p7->d.sign->md_algs;
330 case NID_pkcs7_signedAndEnveloped:
331 rsk=p7->d.signed_and_enveloped->recipientinfo;
332 md_sk=p7->d.signed_and_enveloped->md_algs;
333 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
334 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
335 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
336 if (evp_cipher == NULL)
338 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
341 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
343 case NID_pkcs7_enveloped:
344 rsk=p7->d.enveloped->recipientinfo;
345 enc_alg=p7->d.enveloped->enc_data->algorithm;
346 data_body=p7->d.enveloped->enc_data->enc_data;
347 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
348 if (evp_cipher == NULL)
350 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
353 xalg=p7->d.enveloped->enc_data->algorithm;
356 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
360 /* We will be checking the signature */
363 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
365 xa=sk_X509_ALGOR_value(md_sk,i);
366 if ((btmp=BIO_new(BIO_f_md())) == NULL)
368 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
372 j=OBJ_obj2nid(xa->algorithm);
373 evp_md=EVP_get_digestbynid(j);
376 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
380 BIO_set_md(btmp,evp_md);
389 if (evp_cipher != NULL)
392 unsigned char key[EVP_MAX_KEY_LENGTH];
393 unsigned char iv[EVP_MAX_IV_LENGTH];
401 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
403 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
407 /* It was encrypted, we need to decrypt the secret key
408 * with the private key */
410 /* Find the recipientInfo which matches the passed certificate
414 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
415 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
416 if(!X509_NAME_cmp(ri->issuer_and_serial->issuer,
417 pcert->cert_info->issuer) &&
418 !M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
419 ri->issuer_and_serial->serial)) break;
423 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
424 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
428 jj=EVP_PKEY_size(pkey);
429 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
432 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
436 jj=EVP_PKEY_decrypt(tmp, M_ASN1_STRING_data(ri->enc_key),
437 M_ASN1_STRING_length(ri->enc_key), pkey);
440 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_EVP_LIB);
445 BIO_get_cipher_ctx(etmp,&evp_ctx);
446 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
448 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
451 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
452 /* Some S/MIME clients don't use the same key
453 * and effective key length. The key length is
454 * determined by the size of the decrypted RSA key.
456 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
458 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
459 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
463 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
466 OPENSSL_cleanse(tmp,jj);
476 if (PKCS7_is_detached(p7) || (in_bio != NULL))
483 bio=BIO_new(BIO_s_mem());
484 /* We need to set this so that when we have read all
485 * the data, the encrypt BIO, if present, will read
486 * EOF and encode the last few bytes */
487 BIO_set_mem_eof_return(bio,0);
489 if (data_body->length > 0)
490 BIO_write(bio,(char *)data_body->data,data_body->length);
492 if (data_body->length > 0)
493 bio = BIO_new_mem_buf(data_body->data,data_body->length);
495 bio=BIO_new(BIO_s_mem());
496 BIO_set_mem_eof_return(bio,0);
506 if (out != NULL) BIO_free_all(out);
507 if (btmp != NULL) BIO_free_all(btmp);
508 if (etmp != NULL) BIO_free_all(etmp);
509 if (bio != NULL) BIO_free_all(bio);
517 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
521 bio=BIO_find_type(bio,BIO_TYPE_MD);
524 PKCS7err(PKCS7_F_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
527 BIO_get_md_ctx(bio,pmd);
530 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_INTERNAL_ERROR);
533 if (EVP_MD_CTX_type(*pmd) == nid)
540 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
545 BUF_MEM *buf_mem=NULL;
547 PKCS7_SIGNER_INFO *si;
548 EVP_MD_CTX *mdc,ctx_tmp;
549 STACK_OF(X509_ATTRIBUTE) *sk;
550 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
551 ASN1_OCTET_STRING *os=NULL;
553 EVP_MD_CTX_init(&ctx_tmp);
554 i=OBJ_obj2nid(p7->type);
555 p7->state=PKCS7_S_HEADER;
559 case NID_pkcs7_signedAndEnveloped:
560 /* XXXXXXXXXXXXXXXX */
561 si_sk=p7->d.signed_and_enveloped->signer_info;
562 os=M_ASN1_OCTET_STRING_new();
563 p7->d.signed_and_enveloped->enc_data->enc_data=os;
565 case NID_pkcs7_enveloped:
566 /* XXXXXXXXXXXXXXXX */
567 os=M_ASN1_OCTET_STRING_new();
568 p7->d.enveloped->enc_data->enc_data=os;
570 case NID_pkcs7_signed:
571 si_sk=p7->d.sign->signer_info;
572 os=PKCS7_get_octet_string(p7->d.sign->contents);
573 /* If detached data then the content is excluded */
574 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
575 M_ASN1_OCTET_STRING_free(os);
576 p7->d.sign->contents->d.data = NULL;
580 case NID_pkcs7_digest:
581 os=PKCS7_get_octet_string(p7->d.digest->contents);
582 /* If detached data then the content is excluded */
583 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
585 M_ASN1_OCTET_STRING_free(os);
586 p7->d.digest->contents->d.data = NULL;
594 if ((buf=BUF_MEM_new()) == NULL)
596 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
599 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
601 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
602 if (si->pkey == NULL) continue;
604 j=OBJ_obj2nid(si->digest_alg->algorithm);
608 btmp = PKCS7_find_digest(&mdc, btmp, j);
613 /* We now have the EVP_MD_CTX, lets do the
615 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
616 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
618 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
624 /* If there are attributes, we add the digest
625 * attribute and only sign the attributes */
626 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
628 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
629 unsigned int md_len, alen;
630 ASN1_OCTET_STRING *digest;
631 ASN1_UTCTIME *sign_time;
632 const EVP_MD *md_tmp;
634 /* Add signing time if not already present */
635 if (!PKCS7_get_signed_attribute(si,
636 NID_pkcs9_signingTime))
638 sign_time=X509_gmtime_adj(NULL,0);
639 PKCS7_add_signed_attribute(si,
640 NID_pkcs9_signingTime,
641 V_ASN1_UTCTIME,sign_time);
645 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
646 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
647 digest=M_ASN1_OCTET_STRING_new();
648 M_ASN1_OCTET_STRING_set(digest,md_data,md_len);
649 PKCS7_add_signed_attribute(si,
650 NID_pkcs9_messageDigest,
651 V_ASN1_OCTET_STRING,digest);
653 /* Now sign the attributes */
654 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
655 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
656 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
658 EVP_SignUpdate(&ctx_tmp,abuf,alen);
662 #ifndef OPENSSL_NO_DSA
663 if (si->pkey->type == EVP_PKEY_DSA)
664 ctx_tmp.digest=EVP_dss1();
666 #ifndef OPENSSL_NO_ECDSA
667 if (si->pkey->type == EVP_PKEY_EC)
668 ctx_tmp.digest=EVP_ecdsa();
671 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
672 (unsigned int *)&buf->length,si->pkey))
674 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
677 if (!ASN1_STRING_set(si->enc_digest,
678 (unsigned char *)buf->data,buf->length))
680 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
685 else if (i == NID_pkcs7_digest)
687 unsigned char md_data[EVP_MAX_MD_SIZE];
689 if (!PKCS7_find_digest(&mdc, bio,
690 OBJ_obj2nid(p7->d.digest->md->algorithm)))
692 EVP_DigestFinal_ex(mdc,md_data,&md_len);
693 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
696 if (!PKCS7_is_detached(p7))
698 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
701 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
704 BIO_get_mem_ptr(btmp,&buf_mem);
705 /* Mark the BIO read only then we can use its copy of the data
706 * instead of making an extra copy.
708 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
709 BIO_set_mem_eof_return(btmp, 0);
710 os->data = (unsigned char *)buf_mem->data;
711 os->length = buf_mem->length;
713 M_ASN1_OCTET_STRING_set(os,
714 (unsigned char *)buf_mem->data,buf_mem->length);
719 EVP_MD_CTX_cleanup(&ctx_tmp);
720 if (buf != NULL) BUF_MEM_free(buf);
724 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
725 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
727 PKCS7_ISSUER_AND_SERIAL *ias;
729 STACK_OF(X509) *cert;
732 if (PKCS7_type_is_signed(p7))
734 cert=p7->d.sign->cert;
736 else if (PKCS7_type_is_signedAndEnveloped(p7))
738 cert=p7->d.signed_and_enveloped->cert;
742 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
745 /* XXXXXXXXXXXXXXXXXXXXXXX */
746 ias=si->issuer_and_serial;
748 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
750 /* were we able to find the cert in passed to us */
753 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
758 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
760 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
763 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
764 i=X509_verify_cert(ctx);
767 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
768 X509_STORE_CTX_cleanup(ctx);
771 X509_STORE_CTX_cleanup(ctx);
773 return PKCS7_signatureVerify(bio, p7, si, x509);
778 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
781 ASN1_OCTET_STRING *os;
782 EVP_MD_CTX mdc_tmp,*mdc;
785 STACK_OF(X509_ATTRIBUTE) *sk;
789 EVP_MD_CTX_init(&mdc_tmp);
791 if (!PKCS7_type_is_signed(p7) &&
792 !PKCS7_type_is_signedAndEnveloped(p7)) {
793 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
794 PKCS7_R_WRONG_PKCS7_TYPE);
798 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
803 if ((btmp == NULL) ||
804 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
806 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
807 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
810 BIO_get_md_ctx(btmp,&mdc);
813 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
814 ERR_R_INTERNAL_ERROR);
817 if (EVP_MD_CTX_type(mdc) == md_type)
819 /* Workaround for some broken clients that put the signature
820 * OID instead of the digest OID in digest_alg->algorithm
822 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
827 /* mdc is the digest ctx that we want, unless there are attributes,
828 * in which case the digest is the signed attributes */
829 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
832 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
834 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
835 unsigned int md_len, alen;
836 ASN1_OCTET_STRING *message_digest;
838 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
839 message_digest=PKCS7_digest_from_attributes(sk);
842 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
843 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
846 if ((message_digest->length != (int)md_len) ||
847 (memcmp(message_digest->data,md_dat,md_len)))
852 for (ii=0; ii<message_digest->length; ii++)
853 printf("%02X",message_digest->data[ii]); printf(" sent\n");
854 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
857 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
858 PKCS7_R_DIGEST_FAILURE);
863 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
865 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
866 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
867 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
873 pkey = X509_get_pubkey(x509);
879 #ifndef OPENSSL_NO_DSA
880 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
882 #ifndef OPENSSL_NO_ECDSA
883 if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
886 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
890 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
891 PKCS7_R_SIGNATURE_FAILURE);
898 EVP_MD_CTX_cleanup(&mdc_tmp);
902 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
904 STACK_OF(PKCS7_RECIP_INFO) *rsk;
905 PKCS7_RECIP_INFO *ri;
908 i=OBJ_obj2nid(p7->type);
909 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
910 rsk=p7->d.signed_and_enveloped->recipientinfo;
911 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
912 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
913 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
914 return(ri->issuer_and_serial);
917 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
919 return(get_attribute(si->auth_attr,nid));
922 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
924 return(get_attribute(si->unauth_attr,nid));
927 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
934 if (!o || !sk) return(NULL);
935 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
937 xa=sk_X509_ATTRIBUTE_value(sk,i);
938 if (OBJ_cmp(xa->object,o) == 0)
940 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
941 return(sk_ASN1_TYPE_value(xa->value.set,0));
949 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
952 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
953 return astype->value.octet_string;
956 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
957 STACK_OF(X509_ATTRIBUTE) *sk)
961 if (p7si->auth_attr != NULL)
962 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
963 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
964 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
966 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
967 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
974 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
978 if (p7si->unauth_attr != NULL)
979 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
980 X509_ATTRIBUTE_free);
981 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
982 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
984 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
985 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
992 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
995 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
998 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1001 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1004 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1007 X509_ATTRIBUTE *attr=NULL;
1011 *sk = sk_X509_ATTRIBUTE_new_null();
1013 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1014 sk_X509_ATTRIBUTE_push(*sk,attr);
1020 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1022 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1023 if (OBJ_obj2nid(attr->object) == nid)
1025 X509_ATTRIBUTE_free(attr);
1026 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1027 sk_X509_ATTRIBUTE_set(*sk,i,attr);