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 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
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;
152 ASN1_OCTET_STRING *os=NULL;
155 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
159 * The content field in the PKCS7 ContentInfo is optional, but that really
160 * only applies to inner content (precisely, detached signatures).
162 * When reading content, missing outer content is therefore treated as an
165 * When creating content, PKCS7_content_new() must be called before
166 * calling this method, so a NULL p7->d is always an error.
168 if (p7->d.ptr == NULL) {
169 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
173 i=OBJ_obj2nid(p7->type);
174 p7->state=PKCS7_S_HEADER;
178 case NID_pkcs7_signed:
179 md_sk=p7->d.sign->md_algs;
180 os = PKCS7_get_octet_string(p7->d.sign->contents);
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)
189 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
190 PKCS7_R_CIPHER_NOT_INITIALIZED);
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)
200 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
201 PKCS7_R_CIPHER_NOT_INITIALIZED);
205 case NID_pkcs7_digest:
206 xa = p7->d.digest->md;
207 os = PKCS7_get_octet_string(p7->d.digest->contents);
210 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
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)))
218 if (xa && !PKCS7_bio_add_digest(&out, xa))
221 if (evp_cipher != NULL)
223 unsigned char key[EVP_MAX_KEY_LENGTH];
224 unsigned char iv[EVP_MAX_IV_LENGTH];
230 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
232 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
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));
240 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
242 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
244 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
246 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
250 if (xalg->parameter == NULL) {
251 xalg->parameter = ASN1_TYPE_new();
252 if (xalg->parameter == NULL)
255 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
259 /* Lets do the pub key stuff :-) */
261 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
263 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
264 if (ri->cert == NULL)
266 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
269 if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
271 jj=EVP_PKEY_size(pkey);
273 if (max < jj) max=jj;
275 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
277 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
280 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
282 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
283 if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
285 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
289 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
293 if (!M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj))
295 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
296 ERR_R_MALLOC_FAILURE);
302 OPENSSL_cleanse(key, keylen);
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);
319 bio=BIO_new(BIO_s_mem());
322 BIO_set_mem_eof_return(bio,0);
339 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
342 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
343 pcert->cert_info->issuer);
346 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
347 ri->issuer_and_serial->serial);
351 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
354 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
355 unsigned char *tmp=NULL;
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;
367 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
371 if (p7->d.ptr == NULL) {
372 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
376 i=OBJ_obj2nid(p7->type);
377 p7->state=PKCS7_S_HEADER;
381 case NID_pkcs7_signed:
382 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
383 md_sk=p7->d.sign->md_algs;
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)
393 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
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)
404 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
409 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
413 /* Detached content must be supplied via in_bio instead. */
414 if (data_body == NULL && in_bio == NULL) {
415 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
419 /* We will be checking the signature */
422 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
424 xa=sk_X509_ALGOR_value(md_sk,i);
425 if ((btmp=BIO_new(BIO_f_md())) == NULL)
427 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
431 j=OBJ_obj2nid(xa->algorithm);
432 evp_md=EVP_get_digestbynid(j);
435 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
439 BIO_set_md(btmp,evp_md);
448 if (evp_cipher != NULL)
451 unsigned char key[EVP_MAX_KEY_LENGTH];
452 unsigned char iv[EVP_MAX_IV_LENGTH];
458 unsigned char *tkey = NULL;
462 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
464 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
468 /* It was encrypted, we need to decrypt the secret key
469 * with the private key */
471 /* Find the recipientInfo which matches the passed certificate
476 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
477 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
478 if (!pkcs7_cmp_ri(ri, pcert))
483 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
484 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
489 jj=EVP_PKEY_size(pkey);
490 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
493 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
497 /* If we haven't got a certificate try each ri in turn */
501 /* Temporary storage in case EVP_PKEY_decrypt
502 * overwrites output buffer on error.
505 tmp2 = OPENSSL_malloc(jj);
509 /* Always attempt to decrypt all cases to avoid
510 * leaking timing information about a successful
513 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
516 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
517 tret=EVP_PKEY_decrypt(tmp2,
518 M_ASN1_STRING_data(ri->enc_key),
519 M_ASN1_STRING_length(ri->enc_key),
523 memcpy(tmp, tmp2, tret);
524 OPENSSL_cleanse(tmp2, tret);
533 jj=EVP_PKEY_decrypt(tmp,
534 M_ASN1_STRING_data(ri->enc_key),
535 M_ASN1_STRING_length(ri->enc_key), pkey);
540 BIO_get_cipher_ctx(etmp,&evp_ctx);
541 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
543 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
545 /* Generate random key to counter MMA */
546 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
547 tkey = OPENSSL_malloc(tkeylen);
550 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
552 /* If we have no key use random key */
562 /* Some S/MIME clients don't use the same key
563 * and effective key length. The key length is
564 * determined by the size of the decrypted RSA key.
566 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
568 /* As MMA defence use random key instead */
569 OPENSSL_cleanse(tmp, jj);
577 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
580 OPENSSL_cleanse(tmp,jj);
584 OPENSSL_cleanse(tkey, tkeylen);
596 if (in_bio != NULL) {
600 bio=BIO_new(BIO_s_mem());
601 /* We need to set this so that when we have read all
602 * the data, the encrypt BIO, if present, will read
603 * EOF and encode the last few bytes */
604 BIO_set_mem_eof_return(bio,0);
606 if (data_body->length > 0)
607 BIO_write(bio,(char *)data_body->data,data_body->length);
609 if (data_body->length > 0)
610 bio = BIO_new_mem_buf(data_body->data,data_body->length);
612 bio=BIO_new(BIO_s_mem());
613 BIO_set_mem_eof_return(bio,0);
625 if (out != NULL) BIO_free_all(out);
626 if (btmp != NULL) BIO_free_all(btmp);
627 if (etmp != NULL) BIO_free_all(etmp);
628 if (bio != NULL) BIO_free_all(bio);
636 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
640 bio=BIO_find_type(bio,BIO_TYPE_MD);
643 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
646 BIO_get_md_ctx(bio,pmd);
649 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
652 if (EVP_MD_CTX_type(*pmd) == nid)
659 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
664 BUF_MEM *buf_mem=NULL;
666 PKCS7_SIGNER_INFO *si;
667 EVP_MD_CTX *mdc,ctx_tmp;
668 STACK_OF(X509_ATTRIBUTE) *sk;
669 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
670 ASN1_OCTET_STRING *os=NULL;
673 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
677 if (p7->d.ptr == NULL) {
678 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
682 EVP_MD_CTX_init(&ctx_tmp);
683 i=OBJ_obj2nid(p7->type);
684 p7->state=PKCS7_S_HEADER;
688 case NID_pkcs7_signedAndEnveloped:
689 /* XXXXXXXXXXXXXXXX */
690 si_sk=p7->d.signed_and_enveloped->signer_info;
691 if (!(os=M_ASN1_OCTET_STRING_new()))
693 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
696 p7->d.signed_and_enveloped->enc_data->enc_data=os;
698 case NID_pkcs7_enveloped:
699 /* XXXXXXXXXXXXXXXX */
700 if (!(os=M_ASN1_OCTET_STRING_new()))
702 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
705 p7->d.enveloped->enc_data->enc_data=os;
707 case NID_pkcs7_signed:
708 si_sk=p7->d.sign->signer_info;
709 os=PKCS7_get_octet_string(p7->d.sign->contents);
710 /* If detached data then the content is excluded */
711 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
712 M_ASN1_OCTET_STRING_free(os);
714 p7->d.sign->contents->d.data = NULL;
718 case NID_pkcs7_digest:
719 os=PKCS7_get_octet_string(p7->d.digest->contents);
720 /* If detached data then the content is excluded */
721 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
723 M_ASN1_OCTET_STRING_free(os);
725 p7->d.digest->contents->d.data = NULL;
733 if ((buf=BUF_MEM_new()) == NULL)
735 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
738 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
740 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
741 if (si->pkey == NULL) continue;
743 j=OBJ_obj2nid(si->digest_alg->algorithm);
747 btmp = PKCS7_find_digest(&mdc, btmp, j);
752 /* We now have the EVP_MD_CTX, lets do the
754 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
755 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
757 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
763 /* If there are attributes, we add the digest
764 * attribute and only sign the attributes */
765 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
767 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
768 unsigned int md_len, alen;
769 ASN1_OCTET_STRING *digest;
770 ASN1_UTCTIME *sign_time;
771 const EVP_MD *md_tmp;
773 /* Add signing time if not already present */
774 if (!PKCS7_get_signed_attribute(si,
775 NID_pkcs9_signingTime))
777 if (!(sign_time=X509_gmtime_adj(NULL,0)))
779 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
780 ERR_R_MALLOC_FAILURE);
783 if (!PKCS7_add_signed_attribute(si,
784 NID_pkcs9_signingTime,
785 V_ASN1_UTCTIME,sign_time))
787 M_ASN1_UTCTIME_free(sign_time);
793 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
794 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
795 if (!(digest=M_ASN1_OCTET_STRING_new()))
797 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
798 ERR_R_MALLOC_FAILURE);
801 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
804 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
805 ERR_R_MALLOC_FAILURE);
806 M_ASN1_OCTET_STRING_free(digest);
809 if (!PKCS7_add_signed_attribute(si,
810 NID_pkcs9_messageDigest,
811 V_ASN1_OCTET_STRING,digest))
813 M_ASN1_OCTET_STRING_free(digest);
817 /* Now sign the attributes */
818 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
819 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
820 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
822 EVP_SignUpdate(&ctx_tmp,abuf,alen);
826 #ifndef OPENSSL_NO_DSA
827 if (si->pkey->type == EVP_PKEY_DSA)
828 ctx_tmp.digest=EVP_dss1();
830 #ifndef OPENSSL_NO_ECDSA
831 if (si->pkey->type == EVP_PKEY_EC)
832 ctx_tmp.digest=EVP_ecdsa();
835 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
836 (unsigned int *)&buf->length,si->pkey))
838 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
841 if (!ASN1_STRING_set(si->enc_digest,
842 (unsigned char *)buf->data,buf->length))
844 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
849 else if (i == NID_pkcs7_digest)
851 unsigned char md_data[EVP_MAX_MD_SIZE];
853 if (!PKCS7_find_digest(&mdc, bio,
854 OBJ_obj2nid(p7->d.digest->md->algorithm)))
856 EVP_DigestFinal_ex(mdc,md_data,&md_len);
857 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
860 if (!PKCS7_is_detached(p7)) {
862 * NOTE(emilia): I think we only reach os == NULL here because detached
863 * digested data support is broken.
867 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
870 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
873 BIO_get_mem_ptr(btmp,&buf_mem);
874 /* Mark the BIO read only then we can use its copy of the data
875 * instead of making an extra copy.
877 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
878 BIO_set_mem_eof_return(btmp, 0);
879 os->data = (unsigned char *)buf_mem->data;
880 os->length = buf_mem->length;
882 M_ASN1_OCTET_STRING_set(os,
883 (unsigned char *)buf_mem->data,buf_mem->length);
888 EVP_MD_CTX_cleanup(&ctx_tmp);
889 if (buf != NULL) BUF_MEM_free(buf);
893 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
894 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
896 PKCS7_ISSUER_AND_SERIAL *ias;
898 STACK_OF(X509) *cert;
902 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
906 if (p7->d.ptr == NULL) {
907 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
911 if (PKCS7_type_is_signed(p7))
913 cert=p7->d.sign->cert;
915 else if (PKCS7_type_is_signedAndEnveloped(p7))
917 cert=p7->d.signed_and_enveloped->cert;
921 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
924 /* XXXXXXXXXXXXXXXXXXXXXXX */
925 ias=si->issuer_and_serial;
927 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
929 /* were we able to find the cert in passed to us */
932 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
937 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
939 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
942 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
943 i=X509_verify_cert(ctx);
946 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
947 X509_STORE_CTX_cleanup(ctx);
950 X509_STORE_CTX_cleanup(ctx);
952 return PKCS7_signatureVerify(bio, p7, si, x509);
957 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
960 ASN1_OCTET_STRING *os;
961 EVP_MD_CTX mdc_tmp,*mdc;
964 STACK_OF(X509_ATTRIBUTE) *sk;
968 EVP_MD_CTX_init(&mdc_tmp);
970 if (!PKCS7_type_is_signed(p7) &&
971 !PKCS7_type_is_signedAndEnveloped(p7)) {
972 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
973 PKCS7_R_WRONG_PKCS7_TYPE);
977 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
982 if ((btmp == NULL) ||
983 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
985 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
986 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
989 BIO_get_md_ctx(btmp,&mdc);
992 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
993 ERR_R_INTERNAL_ERROR);
996 if (EVP_MD_CTX_type(mdc) == md_type)
998 /* Workaround for some broken clients that put the signature
999 * OID instead of the digest OID in digest_alg->algorithm
1001 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1003 btmp=BIO_next(btmp);
1006 /* mdc is the digest ctx that we want, unless there are attributes,
1007 * in which case the digest is the signed attributes */
1008 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
1011 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1013 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1014 unsigned int md_len, alen;
1015 ASN1_OCTET_STRING *message_digest;
1017 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
1018 message_digest=PKCS7_digest_from_attributes(sk);
1019 if (!message_digest)
1021 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1022 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1025 if ((message_digest->length != (int)md_len) ||
1026 (memcmp(message_digest->data,md_dat,md_len)))
1031 for (ii=0; ii<message_digest->length; ii++)
1032 printf("%02X",message_digest->data[ii]); printf(" sent\n");
1033 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1036 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1037 PKCS7_R_DIGEST_FAILURE);
1042 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
1044 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1045 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1046 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
1052 pkey = X509_get_pubkey(x509);
1058 #ifndef OPENSSL_NO_DSA
1059 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
1061 #ifndef OPENSSL_NO_ECDSA
1062 if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
1065 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1066 EVP_PKEY_free(pkey);
1069 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1070 PKCS7_R_SIGNATURE_FAILURE);
1077 EVP_MD_CTX_cleanup(&mdc_tmp);
1081 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1083 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1084 PKCS7_RECIP_INFO *ri;
1087 i=OBJ_obj2nid(p7->type);
1088 if (i != NID_pkcs7_signedAndEnveloped)
1090 if (p7->d.signed_and_enveloped == NULL)
1092 rsk=p7->d.signed_and_enveloped->recipientinfo;
1095 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1096 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1097 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1098 return(ri->issuer_and_serial);
1101 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1103 return(get_attribute(si->auth_attr,nid));
1106 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1108 return(get_attribute(si->unauth_attr,nid));
1111 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1118 if (!o || !sk) return(NULL);
1119 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1121 xa=sk_X509_ATTRIBUTE_value(sk,i);
1122 if (OBJ_cmp(xa->object,o) == 0)
1124 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1125 return(sk_ASN1_TYPE_value(xa->value.set,0));
1133 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1136 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1137 return astype->value.octet_string;
1140 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1141 STACK_OF(X509_ATTRIBUTE) *sk)
1145 if (p7si->auth_attr != NULL)
1146 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1147 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1148 if (p7si->auth_attr == NULL)
1150 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1152 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1153 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1160 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1164 if (p7si->unauth_attr != NULL)
1165 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1166 X509_ATTRIBUTE_free);
1167 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1168 if (p7si->unauth_attr == NULL)
1170 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1172 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1173 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1180 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1183 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1186 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1189 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1192 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1195 X509_ATTRIBUTE *attr=NULL;
1199 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1202 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1204 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1206 X509_ATTRIBUTE_free(attr);
1214 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1216 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1217 if (OBJ_obj2nid(attr->object) == nid)
1219 X509_ATTRIBUTE_free(attr);
1220 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1223 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1225 X509_ATTRIBUTE_free(attr);