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 static 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);
307 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
311 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
312 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
315 if (xa && !PKCS7_bio_add_digest(&out, xa))
318 if (evp_cipher != NULL)
320 unsigned char key[EVP_MAX_KEY_LENGTH];
321 unsigned char iv[EVP_MAX_IV_LENGTH];
325 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
327 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
330 BIO_get_cipher_ctx(btmp, &ctx);
331 keylen=EVP_CIPHER_key_length(evp_cipher);
332 ivlen=EVP_CIPHER_iv_length(evp_cipher);
333 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
335 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
337 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
339 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
341 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
345 if (xalg->parameter == NULL) {
346 xalg->parameter = ASN1_TYPE_new();
347 if (xalg->parameter == NULL)
350 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
354 /* Lets do the pub key stuff :-) */
355 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
357 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
358 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
361 OPENSSL_cleanse(key, keylen);
372 if (PKCS7_is_detached(p7))
373 bio=BIO_new(BIO_s_null());
374 else if (os && os->length > 0)
375 bio = BIO_new_mem_buf(os->data, os->length);
378 bio=BIO_new(BIO_s_mem());
381 BIO_set_mem_eof_return(bio,0);
401 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
404 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
405 pcert->cert_info->issuer);
408 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
409 ri->issuer_and_serial->serial);
413 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
416 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
418 ASN1_OCTET_STRING *data_body=NULL;
419 const EVP_MD *evp_md;
420 const EVP_CIPHER *evp_cipher=NULL;
421 EVP_CIPHER_CTX *evp_ctx=NULL;
422 X509_ALGOR *enc_alg=NULL;
423 STACK_OF(X509_ALGOR) *md_sk=NULL;
424 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
425 PKCS7_RECIP_INFO *ri=NULL;
427 i=OBJ_obj2nid(p7->type);
428 p7->state=PKCS7_S_HEADER;
432 case NID_pkcs7_signed:
433 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
434 md_sk=p7->d.sign->md_algs;
436 case NID_pkcs7_signedAndEnveloped:
437 rsk=p7->d.signed_and_enveloped->recipientinfo;
438 md_sk=p7->d.signed_and_enveloped->md_algs;
439 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
440 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
441 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
442 if (evp_cipher == NULL)
444 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
448 case NID_pkcs7_enveloped:
449 rsk=p7->d.enveloped->recipientinfo;
450 enc_alg=p7->d.enveloped->enc_data->algorithm;
451 data_body=p7->d.enveloped->enc_data->enc_data;
452 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
453 if (evp_cipher == NULL)
455 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
460 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
464 /* We will be checking the signature */
467 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
469 xa=sk_X509_ALGOR_value(md_sk,i);
470 if ((btmp=BIO_new(BIO_f_md())) == NULL)
472 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
476 j=OBJ_obj2nid(xa->algorithm);
477 evp_md=EVP_get_digestbynid(j);
480 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
484 BIO_set_md(btmp,evp_md);
493 if (evp_cipher != NULL)
496 unsigned char key[EVP_MAX_KEY_LENGTH];
497 unsigned char iv[EVP_MAX_IV_LENGTH];
503 unsigned char *ek = NULL;
506 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
508 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
512 /* It was encrypted, we need to decrypt the secret key
513 * with the private key */
515 /* Find the recipientInfo which matches the passed certificate
521 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
523 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
524 if (!pkcs7_cmp_ri(ri, pcert))
530 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
531 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
536 /* If we haven't got a certificate try each ri in turn */
540 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
542 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
543 if (pkcs7_decrypt_rinfo(&ek, &eklen,
551 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
552 PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
558 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) <= 0)
563 BIO_get_cipher_ctx(etmp,&evp_ctx);
564 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
566 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
569 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
570 /* Some S/MIME clients don't use the same key
571 * and effective key length. The key length is
572 * determined by the size of the decrypted RSA key.
574 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen))
576 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
577 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
581 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0)
586 OPENSSL_cleanse(ek,eklen);
598 if (PKCS7_is_detached(p7) || (in_bio != NULL))
605 bio=BIO_new(BIO_s_mem());
606 /* We need to set this so that when we have read all
607 * the data, the encrypt BIO, if present, will read
608 * EOF and encode the last few bytes */
609 BIO_set_mem_eof_return(bio,0);
611 if (data_body->length > 0)
612 BIO_write(bio,(char *)data_body->data,data_body->length);
614 if (data_body->length > 0)
615 bio = BIO_new_mem_buf(data_body->data,data_body->length);
617 bio=BIO_new(BIO_s_mem());
618 BIO_set_mem_eof_return(bio,0);
630 if (out != NULL) BIO_free_all(out);
631 if (btmp != NULL) BIO_free_all(btmp);
632 if (etmp != NULL) BIO_free_all(etmp);
633 if (bio != NULL) BIO_free_all(bio);
639 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
643 bio=BIO_find_type(bio,BIO_TYPE_MD);
646 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
649 BIO_get_md_ctx(bio,pmd);
652 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
655 if (EVP_MD_CTX_type(*pmd) == nid)
662 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
664 unsigned char md_data[EVP_MAX_MD_SIZE];
667 /* Add signing time if not already present */
668 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime))
670 if (!PKCS7_add0_attrib_signing_time(si, NULL))
672 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB,
673 ERR_R_MALLOC_FAILURE);
679 if (!EVP_DigestFinal_ex(mctx, md_data,&md_len))
681 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
684 if (!PKCS7_add1_attrib_digest(si, md_data, md_len))
686 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
690 /* Now sign the attributes */
691 if (!PKCS7_SIGNER_INFO_sign(si))
698 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
703 PKCS7_SIGNER_INFO *si;
704 EVP_MD_CTX *mdc,ctx_tmp;
705 STACK_OF(X509_ATTRIBUTE) *sk;
706 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
707 ASN1_OCTET_STRING *os=NULL;
709 EVP_MD_CTX_init(&ctx_tmp);
710 i=OBJ_obj2nid(p7->type);
711 p7->state=PKCS7_S_HEADER;
718 case NID_pkcs7_signedAndEnveloped:
719 /* XXXXXXXXXXXXXXXX */
720 si_sk=p7->d.signed_and_enveloped->signer_info;
721 os = p7->d.signed_and_enveloped->enc_data->enc_data;
724 os=M_ASN1_OCTET_STRING_new();
727 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
730 p7->d.signed_and_enveloped->enc_data->enc_data=os;
733 case NID_pkcs7_enveloped:
734 /* XXXXXXXXXXXXXXXX */
735 os = p7->d.enveloped->enc_data->enc_data;
738 os=M_ASN1_OCTET_STRING_new();
741 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
744 p7->d.enveloped->enc_data->enc_data=os;
747 case NID_pkcs7_signed:
748 si_sk=p7->d.sign->signer_info;
749 os=PKCS7_get_octet_string(p7->d.sign->contents);
750 /* If detached data then the content is excluded */
751 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
752 M_ASN1_OCTET_STRING_free(os);
753 p7->d.sign->contents->d.data = NULL;
757 case NID_pkcs7_digest:
758 os=PKCS7_get_octet_string(p7->d.digest->contents);
759 /* If detached data then the content is excluded */
760 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
762 M_ASN1_OCTET_STRING_free(os);
763 p7->d.digest->contents->d.data = NULL;
768 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
774 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
776 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
777 if (si->pkey == NULL)
780 j = OBJ_obj2nid(si->digest_alg->algorithm);
784 btmp = PKCS7_find_digest(&mdc, btmp, j);
789 /* We now have the EVP_MD_CTX, lets do the
791 if (!EVP_MD_CTX_copy_ex(&ctx_tmp,mdc))
796 /* If there are attributes, we add the digest
797 * attribute and only sign the attributes */
798 if (sk_X509_ATTRIBUTE_num(sk) > 0)
800 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
805 unsigned char *abuf = NULL;
806 unsigned int abuflen;
807 abuflen = EVP_PKEY_size(si->pkey);
808 abuf = OPENSSL_malloc(abuflen);
812 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
815 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
819 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
823 else if (i == NID_pkcs7_digest)
825 unsigned char md_data[EVP_MAX_MD_SIZE];
827 if (!PKCS7_find_digest(&mdc, bio,
828 OBJ_obj2nid(p7->d.digest->md->algorithm)))
830 if (!EVP_DigestFinal_ex(mdc,md_data,&md_len))
832 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
835 if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF))
839 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
842 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
845 contlen = BIO_get_mem_data(btmp, &cont);
846 /* Mark the BIO read only then we can use its copy of the data
847 * instead of making an extra copy.
849 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
850 BIO_set_mem_eof_return(btmp, 0);
851 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
855 EVP_MD_CTX_cleanup(&ctx_tmp);
859 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
863 unsigned char *abuf = NULL;
866 const EVP_MD *md = NULL;
868 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
872 EVP_MD_CTX_init(&mctx);
873 if (EVP_DigestSignInit(&mctx, &pctx, md,NULL, si->pkey) <= 0)
876 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
877 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0)
879 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
883 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr,&abuf,
884 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
887 if (EVP_DigestSignUpdate(&mctx,abuf,alen) <= 0)
890 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
892 abuf = OPENSSL_malloc(siglen);
895 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
898 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
899 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0)
901 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
905 EVP_MD_CTX_cleanup(&mctx);
907 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
914 EVP_MD_CTX_cleanup(&mctx);
919 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
920 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
922 PKCS7_ISSUER_AND_SERIAL *ias;
924 STACK_OF(X509) *cert;
927 if (PKCS7_type_is_signed(p7))
929 cert=p7->d.sign->cert;
931 else if (PKCS7_type_is_signedAndEnveloped(p7))
933 cert=p7->d.signed_and_enveloped->cert;
937 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
940 /* XXXXXXXXXXXXXXXXXXXXXXX */
941 ias=si->issuer_and_serial;
943 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
945 /* were we able to find the cert in passed to us */
948 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
953 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
955 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
958 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
959 i=X509_verify_cert(ctx);
962 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
963 X509_STORE_CTX_cleanup(ctx);
966 X509_STORE_CTX_cleanup(ctx);
968 return PKCS7_signatureVerify(bio, p7, si, x509);
973 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
976 ASN1_OCTET_STRING *os;
977 EVP_MD_CTX mdc_tmp,*mdc;
980 STACK_OF(X509_ATTRIBUTE) *sk;
984 EVP_MD_CTX_init(&mdc_tmp);
986 if (!PKCS7_type_is_signed(p7) &&
987 !PKCS7_type_is_signedAndEnveloped(p7)) {
988 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
989 PKCS7_R_WRONG_PKCS7_TYPE);
993 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
998 if ((btmp == NULL) ||
999 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
1001 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1002 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1005 BIO_get_md_ctx(btmp,&mdc);
1008 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1009 ERR_R_INTERNAL_ERROR);
1012 if (EVP_MD_CTX_type(mdc) == md_type)
1014 /* Workaround for some broken clients that put the signature
1015 * OID instead of the digest OID in digest_alg->algorithm
1017 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1019 btmp=BIO_next(btmp);
1022 /* mdc is the digest ctx that we want, unless there are attributes,
1023 * in which case the digest is the signed attributes */
1024 if (!EVP_MD_CTX_copy_ex(&mdc_tmp,mdc))
1028 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1030 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1031 unsigned int md_len;
1033 ASN1_OCTET_STRING *message_digest;
1035 if (!EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len))
1037 message_digest=PKCS7_digest_from_attributes(sk);
1038 if (!message_digest)
1040 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1041 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1044 if ((message_digest->length != (int)md_len) ||
1045 (memcmp(message_digest->data,md_dat,md_len)))
1050 for (ii=0; ii<message_digest->length; ii++)
1051 printf("%02X",message_digest->data[ii]); printf(" sent\n");
1052 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1055 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1056 PKCS7_R_DIGEST_FAILURE);
1061 if (!EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL))
1064 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1065 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1068 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,ERR_R_ASN1_LIB);
1072 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1079 pkey = X509_get_pubkey(x509);
1086 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1087 EVP_PKEY_free(pkey);
1090 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1091 PKCS7_R_SIGNATURE_FAILURE);
1098 EVP_MD_CTX_cleanup(&mdc_tmp);
1102 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1104 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1105 PKCS7_RECIP_INFO *ri;
1108 i=OBJ_obj2nid(p7->type);
1109 if (i != NID_pkcs7_signedAndEnveloped)
1111 if (p7->d.signed_and_enveloped == NULL)
1113 rsk=p7->d.signed_and_enveloped->recipientinfo;
1116 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1117 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1118 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1119 return(ri->issuer_and_serial);
1122 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1124 return(get_attribute(si->auth_attr,nid));
1127 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1129 return(get_attribute(si->unauth_attr,nid));
1132 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1139 if (!o || !sk) return(NULL);
1140 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1142 xa=sk_X509_ATTRIBUTE_value(sk,i);
1143 if (OBJ_cmp(xa->object,o) == 0)
1145 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1146 return(sk_ASN1_TYPE_value(xa->value.set,0));
1154 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1157 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1158 return astype->value.octet_string;
1161 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1162 STACK_OF(X509_ATTRIBUTE) *sk)
1166 if (p7si->auth_attr != NULL)
1167 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1168 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1169 if (p7si->auth_attr == NULL)
1171 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1173 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1174 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1181 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1185 if (p7si->unauth_attr != NULL)
1186 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1187 X509_ATTRIBUTE_free);
1188 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1189 if (p7si->unauth_attr == NULL)
1191 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1193 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1194 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1201 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1204 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1207 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1210 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1213 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1216 X509_ATTRIBUTE *attr=NULL;
1220 *sk = sk_X509_ATTRIBUTE_new_null();
1224 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1226 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1228 X509_ATTRIBUTE_free(attr);
1236 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1238 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1239 if (OBJ_obj2nid(attr->object) == nid)
1241 X509_ATTRIBUTE_free(attr);
1242 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1245 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1247 X509_ATTRIBUTE_free(attr);