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)
239 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
247 OPENSSL_cleanse(*pek, *peklen);
256 EVP_PKEY_CTX_free(pctx);
263 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
266 BIO *out=NULL,*btmp=NULL;
267 X509_ALGOR *xa = NULL;
268 const EVP_CIPHER *evp_cipher=NULL;
269 STACK_OF(X509_ALGOR) *md_sk=NULL;
270 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
271 X509_ALGOR *xalg=NULL;
272 PKCS7_RECIP_INFO *ri=NULL;
273 ASN1_OCTET_STRING *os=NULL;
275 i=OBJ_obj2nid(p7->type);
276 p7->state=PKCS7_S_HEADER;
280 case NID_pkcs7_signed:
281 md_sk=p7->d.sign->md_algs;
282 os = PKCS7_get_octet_string(p7->d.sign->contents);
284 case NID_pkcs7_signedAndEnveloped:
285 rsk=p7->d.signed_and_enveloped->recipientinfo;
286 md_sk=p7->d.signed_and_enveloped->md_algs;
287 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
288 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
289 if (evp_cipher == NULL)
291 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
292 PKCS7_R_CIPHER_NOT_INITIALIZED);
296 case NID_pkcs7_enveloped:
297 rsk=p7->d.enveloped->recipientinfo;
298 xalg=p7->d.enveloped->enc_data->algorithm;
299 evp_cipher=p7->d.enveloped->enc_data->cipher;
300 if (evp_cipher == NULL)
302 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
303 PKCS7_R_CIPHER_NOT_INITIALIZED);
307 case NID_pkcs7_digest:
308 xa = p7->d.digest->md;
309 os = PKCS7_get_octet_string(p7->d.digest->contents);
314 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
318 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
319 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
322 if (xa && !PKCS7_bio_add_digest(&out, xa))
325 if (evp_cipher != NULL)
327 unsigned char key[EVP_MAX_KEY_LENGTH];
328 unsigned char iv[EVP_MAX_IV_LENGTH];
332 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
334 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
337 BIO_get_cipher_ctx(btmp, &ctx);
338 keylen=EVP_CIPHER_key_length(evp_cipher);
339 ivlen=EVP_CIPHER_iv_length(evp_cipher);
340 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
342 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
344 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
346 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
348 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
352 if (xalg->parameter == NULL) {
353 xalg->parameter = ASN1_TYPE_new();
354 if (xalg->parameter == NULL)
357 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
361 /* Lets do the pub key stuff :-) */
362 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
364 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
365 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
368 OPENSSL_cleanse(key, keylen);
379 if (PKCS7_is_detached(p7))
380 bio=BIO_new(BIO_s_null());
381 else if (os && os->length > 0)
382 bio = BIO_new_mem_buf(os->data, os->length);
385 bio=BIO_new(BIO_s_mem());
388 BIO_set_mem_eof_return(bio,0);
408 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
411 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
412 pcert->cert_info->issuer);
415 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
416 ri->issuer_and_serial->serial);
420 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
423 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
425 ASN1_OCTET_STRING *data_body=NULL;
426 const EVP_MD *evp_md;
427 const EVP_CIPHER *evp_cipher=NULL;
428 EVP_CIPHER_CTX *evp_ctx=NULL;
429 X509_ALGOR *enc_alg=NULL;
430 STACK_OF(X509_ALGOR) *md_sk=NULL;
431 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
432 PKCS7_RECIP_INFO *ri=NULL;
434 i=OBJ_obj2nid(p7->type);
435 p7->state=PKCS7_S_HEADER;
439 case NID_pkcs7_signed:
440 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
441 md_sk=p7->d.sign->md_algs;
443 case NID_pkcs7_signedAndEnveloped:
444 rsk=p7->d.signed_and_enveloped->recipientinfo;
445 md_sk=p7->d.signed_and_enveloped->md_algs;
446 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
447 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
448 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
449 if (evp_cipher == NULL)
451 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
455 case NID_pkcs7_enveloped:
456 rsk=p7->d.enveloped->recipientinfo;
457 enc_alg=p7->d.enveloped->enc_data->algorithm;
458 data_body=p7->d.enveloped->enc_data->enc_data;
459 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
460 if (evp_cipher == NULL)
462 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
467 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
471 /* We will be checking the signature */
474 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
476 xa=sk_X509_ALGOR_value(md_sk,i);
477 if ((btmp=BIO_new(BIO_f_md())) == NULL)
479 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
483 j=OBJ_obj2nid(xa->algorithm);
484 evp_md=EVP_get_digestbynid(j);
487 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
491 BIO_set_md(btmp,evp_md);
500 if (evp_cipher != NULL)
503 unsigned char key[EVP_MAX_KEY_LENGTH];
504 unsigned char iv[EVP_MAX_IV_LENGTH];
510 unsigned char *ek = NULL, *tkey = NULL;
513 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
515 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
519 /* It was encrypted, we need to decrypt the secret key
520 * with the private key */
522 /* Find the recipientInfo which matches the passed certificate
528 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
530 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
531 if (!pkcs7_cmp_ri(ri, pcert))
537 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
538 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
543 /* If we haven't got a certificate try each ri in turn */
546 /* Always attempt to decrypt all rinfo even
547 * after sucess as a defence against MMA timing
550 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
552 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
554 if (pkcs7_decrypt_rinfo(&ek, &eklen,
562 /* Only exit on fatal errors, not decrypt failure */
563 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
569 BIO_get_cipher_ctx(etmp,&evp_ctx);
570 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
572 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
574 /* Generate random key as MMA defence */
575 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
576 tkey = OPENSSL_malloc(tkeylen);
579 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
588 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
589 /* Some S/MIME clients don't use the same key
590 * and effective key length. The key length is
591 * determined by the size of the decrypted RSA key.
593 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen))
595 /* Use random key as MMA defence */
596 OPENSSL_cleanse(ek, eklen);
603 /* Clear errors so we don't leak information useful in MMA */
605 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0)
610 OPENSSL_cleanse(ek,eklen);
615 OPENSSL_cleanse(tkey,tkeylen);
627 if (PKCS7_is_detached(p7) || (in_bio != NULL))
634 bio=BIO_new(BIO_s_mem());
635 /* We need to set this so that when we have read all
636 * the data, the encrypt BIO, if present, will read
637 * EOF and encode the last few bytes */
638 BIO_set_mem_eof_return(bio,0);
640 if (data_body->length > 0)
641 BIO_write(bio,(char *)data_body->data,data_body->length);
643 if (data_body->length > 0)
644 bio = BIO_new_mem_buf(data_body->data,data_body->length);
646 bio=BIO_new(BIO_s_mem());
647 BIO_set_mem_eof_return(bio,0);
659 if (out != NULL) BIO_free_all(out);
660 if (btmp != NULL) BIO_free_all(btmp);
661 if (etmp != NULL) BIO_free_all(etmp);
662 if (bio != NULL) BIO_free_all(bio);
668 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
672 bio=BIO_find_type(bio,BIO_TYPE_MD);
675 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
678 BIO_get_md_ctx(bio,pmd);
681 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
684 if (EVP_MD_CTX_type(*pmd) == nid)
691 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
693 unsigned char md_data[EVP_MAX_MD_SIZE];
696 /* Add signing time if not already present */
697 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime))
699 if (!PKCS7_add0_attrib_signing_time(si, NULL))
701 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB,
702 ERR_R_MALLOC_FAILURE);
708 if (!EVP_DigestFinal_ex(mctx, md_data,&md_len))
710 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
713 if (!PKCS7_add1_attrib_digest(si, md_data, md_len))
715 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
719 /* Now sign the attributes */
720 if (!PKCS7_SIGNER_INFO_sign(si))
727 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
732 PKCS7_SIGNER_INFO *si;
733 EVP_MD_CTX *mdc,ctx_tmp;
734 STACK_OF(X509_ATTRIBUTE) *sk;
735 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
736 ASN1_OCTET_STRING *os=NULL;
738 EVP_MD_CTX_init(&ctx_tmp);
739 i=OBJ_obj2nid(p7->type);
740 p7->state=PKCS7_S_HEADER;
747 case NID_pkcs7_signedAndEnveloped:
748 /* XXXXXXXXXXXXXXXX */
749 si_sk=p7->d.signed_and_enveloped->signer_info;
750 os = p7->d.signed_and_enveloped->enc_data->enc_data;
753 os=M_ASN1_OCTET_STRING_new();
756 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
759 p7->d.signed_and_enveloped->enc_data->enc_data=os;
762 case NID_pkcs7_enveloped:
763 /* XXXXXXXXXXXXXXXX */
764 os = p7->d.enveloped->enc_data->enc_data;
767 os=M_ASN1_OCTET_STRING_new();
770 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
773 p7->d.enveloped->enc_data->enc_data=os;
776 case NID_pkcs7_signed:
777 si_sk=p7->d.sign->signer_info;
778 os=PKCS7_get_octet_string(p7->d.sign->contents);
779 /* If detached data then the content is excluded */
780 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
781 M_ASN1_OCTET_STRING_free(os);
782 p7->d.sign->contents->d.data = NULL;
786 case NID_pkcs7_digest:
787 os=PKCS7_get_octet_string(p7->d.digest->contents);
788 /* If detached data then the content is excluded */
789 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
791 M_ASN1_OCTET_STRING_free(os);
792 p7->d.digest->contents->d.data = NULL;
797 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
803 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
805 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
806 if (si->pkey == NULL)
809 j = OBJ_obj2nid(si->digest_alg->algorithm);
813 btmp = PKCS7_find_digest(&mdc, btmp, j);
818 /* We now have the EVP_MD_CTX, lets do the
820 if (!EVP_MD_CTX_copy_ex(&ctx_tmp,mdc))
825 /* If there are attributes, we add the digest
826 * attribute and only sign the attributes */
827 if (sk_X509_ATTRIBUTE_num(sk) > 0)
829 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
834 unsigned char *abuf = NULL;
835 unsigned int abuflen;
836 abuflen = EVP_PKEY_size(si->pkey);
837 abuf = OPENSSL_malloc(abuflen);
841 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
844 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
848 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
852 else if (i == NID_pkcs7_digest)
854 unsigned char md_data[EVP_MAX_MD_SIZE];
856 if (!PKCS7_find_digest(&mdc, bio,
857 OBJ_obj2nid(p7->d.digest->md->algorithm)))
859 if (!EVP_DigestFinal_ex(mdc,md_data,&md_len))
861 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
864 if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF))
868 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
871 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
874 contlen = BIO_get_mem_data(btmp, &cont);
875 /* Mark the BIO read only then we can use its copy of the data
876 * instead of making an extra copy.
878 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
879 BIO_set_mem_eof_return(btmp, 0);
880 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
884 EVP_MD_CTX_cleanup(&ctx_tmp);
888 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
892 unsigned char *abuf = NULL;
895 const EVP_MD *md = NULL;
897 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
901 EVP_MD_CTX_init(&mctx);
902 if (EVP_DigestSignInit(&mctx, &pctx, md,NULL, si->pkey) <= 0)
905 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
906 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0)
908 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
912 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr,&abuf,
913 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
916 if (EVP_DigestSignUpdate(&mctx,abuf,alen) <= 0)
919 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
921 abuf = OPENSSL_malloc(siglen);
924 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
927 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
928 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0)
930 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
934 EVP_MD_CTX_cleanup(&mctx);
936 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
943 EVP_MD_CTX_cleanup(&mctx);
948 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
949 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
951 PKCS7_ISSUER_AND_SERIAL *ias;
953 STACK_OF(X509) *cert;
956 if (PKCS7_type_is_signed(p7))
958 cert=p7->d.sign->cert;
960 else if (PKCS7_type_is_signedAndEnveloped(p7))
962 cert=p7->d.signed_and_enveloped->cert;
966 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
969 /* XXXXXXXXXXXXXXXXXXXXXXX */
970 ias=si->issuer_and_serial;
972 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
974 /* were we able to find the cert in passed to us */
977 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
982 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
984 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
987 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
988 i=X509_verify_cert(ctx);
991 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
992 X509_STORE_CTX_cleanup(ctx);
995 X509_STORE_CTX_cleanup(ctx);
997 return PKCS7_signatureVerify(bio, p7, si, x509);
1002 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
1005 ASN1_OCTET_STRING *os;
1006 EVP_MD_CTX mdc_tmp,*mdc;
1009 STACK_OF(X509_ATTRIBUTE) *sk;
1013 EVP_MD_CTX_init(&mdc_tmp);
1015 if (!PKCS7_type_is_signed(p7) &&
1016 !PKCS7_type_is_signedAndEnveloped(p7)) {
1017 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1018 PKCS7_R_WRONG_PKCS7_TYPE);
1022 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
1027 if ((btmp == NULL) ||
1028 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
1030 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1031 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1034 BIO_get_md_ctx(btmp,&mdc);
1037 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1038 ERR_R_INTERNAL_ERROR);
1041 if (EVP_MD_CTX_type(mdc) == md_type)
1043 /* Workaround for some broken clients that put the signature
1044 * OID instead of the digest OID in digest_alg->algorithm
1046 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1048 btmp=BIO_next(btmp);
1051 /* mdc is the digest ctx that we want, unless there are attributes,
1052 * in which case the digest is the signed attributes */
1053 if (!EVP_MD_CTX_copy_ex(&mdc_tmp,mdc))
1057 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1059 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1060 unsigned int md_len;
1062 ASN1_OCTET_STRING *message_digest;
1064 if (!EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len))
1066 message_digest=PKCS7_digest_from_attributes(sk);
1067 if (!message_digest)
1069 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1070 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1073 if ((message_digest->length != (int)md_len) ||
1074 (memcmp(message_digest->data,md_dat,md_len)))
1079 for (ii=0; ii<message_digest->length; ii++)
1080 printf("%02X",message_digest->data[ii]); printf(" sent\n");
1081 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1084 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1085 PKCS7_R_DIGEST_FAILURE);
1090 if (!EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL))
1093 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1094 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1097 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,ERR_R_ASN1_LIB);
1101 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1108 pkey = X509_get_pubkey(x509);
1115 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1116 EVP_PKEY_free(pkey);
1119 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1120 PKCS7_R_SIGNATURE_FAILURE);
1127 EVP_MD_CTX_cleanup(&mdc_tmp);
1131 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1133 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1134 PKCS7_RECIP_INFO *ri;
1137 i=OBJ_obj2nid(p7->type);
1138 if (i != NID_pkcs7_signedAndEnveloped)
1140 if (p7->d.signed_and_enveloped == NULL)
1142 rsk=p7->d.signed_and_enveloped->recipientinfo;
1145 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1146 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1147 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1148 return(ri->issuer_and_serial);
1151 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1153 return(get_attribute(si->auth_attr,nid));
1156 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1158 return(get_attribute(si->unauth_attr,nid));
1161 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1168 if (!o || !sk) return(NULL);
1169 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1171 xa=sk_X509_ATTRIBUTE_value(sk,i);
1172 if (OBJ_cmp(xa->object,o) == 0)
1174 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1175 return(sk_ASN1_TYPE_value(xa->value.set,0));
1183 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1186 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1187 return astype->value.octet_string;
1190 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1191 STACK_OF(X509_ATTRIBUTE) *sk)
1195 if (p7si->auth_attr != NULL)
1196 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1197 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1198 if (p7si->auth_attr == NULL)
1200 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1202 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1203 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1210 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1214 if (p7si->unauth_attr != NULL)
1215 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1216 X509_ATTRIBUTE_free);
1217 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1218 if (p7si->unauth_attr == NULL)
1220 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1222 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1223 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1230 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1233 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1236 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1239 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1242 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1245 X509_ATTRIBUTE *attr=NULL;
1249 *sk = sk_X509_ATTRIBUTE_new_null();
1253 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1255 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1257 X509_ATTRIBUTE_free(attr);
1265 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1267 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1268 if (OBJ_obj2nid(attr->object) == nid)
1270 X509_ATTRIBUTE_free(attr);
1271 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1274 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1276 X509_ATTRIBUTE_free(attr);