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;
276 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
280 * The content field in the PKCS7 ContentInfo is optional, but that really
281 * only applies to inner content (precisely, detached signatures).
283 * When reading content, missing outer content is therefore treated as an
286 * When creating content, PKCS7_content_new() must be called before
287 * calling this method, so a NULL p7->d is always an error.
289 if (p7->d.ptr == NULL) {
290 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
294 i=OBJ_obj2nid(p7->type);
295 p7->state=PKCS7_S_HEADER;
299 case NID_pkcs7_signed:
300 md_sk=p7->d.sign->md_algs;
301 os = PKCS7_get_octet_string(p7->d.sign->contents);
303 case NID_pkcs7_signedAndEnveloped:
304 rsk=p7->d.signed_and_enveloped->recipientinfo;
305 md_sk=p7->d.signed_and_enveloped->md_algs;
306 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
307 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
308 if (evp_cipher == NULL)
310 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
311 PKCS7_R_CIPHER_NOT_INITIALIZED);
315 case NID_pkcs7_enveloped:
316 rsk=p7->d.enveloped->recipientinfo;
317 xalg=p7->d.enveloped->enc_data->algorithm;
318 evp_cipher=p7->d.enveloped->enc_data->cipher;
319 if (evp_cipher == NULL)
321 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
322 PKCS7_R_CIPHER_NOT_INITIALIZED);
326 case NID_pkcs7_digest:
327 xa = p7->d.digest->md;
328 os = PKCS7_get_octet_string(p7->d.digest->contents);
333 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
337 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
338 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
341 if (xa && !PKCS7_bio_add_digest(&out, xa))
344 if (evp_cipher != NULL)
346 unsigned char key[EVP_MAX_KEY_LENGTH];
347 unsigned char iv[EVP_MAX_IV_LENGTH];
351 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
353 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
356 BIO_get_cipher_ctx(btmp, &ctx);
357 keylen=EVP_CIPHER_key_length(evp_cipher);
358 ivlen=EVP_CIPHER_iv_length(evp_cipher);
359 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
361 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
363 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
365 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
367 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
371 if (xalg->parameter == NULL) {
372 xalg->parameter = ASN1_TYPE_new();
373 if (xalg->parameter == NULL)
376 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
380 /* Lets do the pub key stuff :-) */
381 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
383 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
384 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
387 OPENSSL_cleanse(key, keylen);
398 if (PKCS7_is_detached(p7))
399 bio=BIO_new(BIO_s_null());
400 else if (os && os->length > 0)
401 bio = BIO_new_mem_buf(os->data, os->length);
404 bio=BIO_new(BIO_s_mem());
407 BIO_set_mem_eof_return(bio,0);
427 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
430 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
431 pcert->cert_info->issuer);
434 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
435 ri->issuer_and_serial->serial);
439 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
442 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
444 ASN1_OCTET_STRING *data_body=NULL;
445 const EVP_MD *evp_md;
446 const EVP_CIPHER *evp_cipher=NULL;
447 EVP_CIPHER_CTX *evp_ctx=NULL;
448 X509_ALGOR *enc_alg=NULL;
449 STACK_OF(X509_ALGOR) *md_sk=NULL;
450 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
451 PKCS7_RECIP_INFO *ri=NULL;
452 unsigned char *ek = NULL, *tkey = NULL;
453 int eklen = 0, tkeylen = 0;
456 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
460 if (p7->d.ptr == NULL) {
461 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
465 i=OBJ_obj2nid(p7->type);
466 p7->state=PKCS7_S_HEADER;
470 case NID_pkcs7_signed:
471 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
472 if (!PKCS7_is_detached(p7) && data_body == NULL)
474 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_INVALID_SIGNED_DATA_TYPE);
477 md_sk=p7->d.sign->md_algs;
479 case NID_pkcs7_signedAndEnveloped:
480 rsk=p7->d.signed_and_enveloped->recipientinfo;
481 md_sk=p7->d.signed_and_enveloped->md_algs;
482 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
483 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
484 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
485 if (evp_cipher == NULL)
487 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
491 case NID_pkcs7_enveloped:
492 rsk=p7->d.enveloped->recipientinfo;
493 enc_alg=p7->d.enveloped->enc_data->algorithm;
494 data_body=p7->d.enveloped->enc_data->enc_data;
495 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
496 if (evp_cipher == NULL)
498 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
503 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
507 /* Detached content must be supplied via in_bio instead. */
508 if (data_body == NULL && in_bio == NULL) {
509 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
513 /* We will be checking the signature */
516 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
518 xa=sk_X509_ALGOR_value(md_sk,i);
519 if ((btmp=BIO_new(BIO_f_md())) == NULL)
521 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
525 j=OBJ_obj2nid(xa->algorithm);
526 evp_md=EVP_get_digestbynid(j);
529 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
533 BIO_set_md(btmp,evp_md);
542 if (evp_cipher != NULL)
545 unsigned char key[EVP_MAX_KEY_LENGTH];
546 unsigned char iv[EVP_MAX_IV_LENGTH];
553 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
555 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
559 /* It was encrypted, we need to decrypt the secret key
560 * with the private key */
562 /* Find the recipientInfo which matches the passed certificate
568 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
570 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
571 if (!pkcs7_cmp_ri(ri, pcert))
577 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
578 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
583 /* If we haven't got a certificate try each ri in turn */
586 /* Always attempt to decrypt all rinfo even
587 * after sucess as a defence against MMA timing
590 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
592 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
594 if (pkcs7_decrypt_rinfo(&ek, &eklen,
602 /* Only exit on fatal errors, not decrypt failure */
603 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
609 BIO_get_cipher_ctx(etmp,&evp_ctx);
610 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
612 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
614 /* Generate random key as MMA defence */
615 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
616 tkey = OPENSSL_malloc(tkeylen);
619 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
628 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
629 /* Some S/MIME clients don't use the same key
630 * and effective key length. The key length is
631 * determined by the size of the decrypted RSA key.
633 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen))
635 /* Use random key as MMA defence */
636 OPENSSL_cleanse(ek, eklen);
643 /* Clear errors so we don't leak information useful in MMA */
645 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,ek,NULL,0) <= 0)
650 OPENSSL_cleanse(ek,eklen);
656 OPENSSL_cleanse(tkey,tkeylen);
676 bio=BIO_new(BIO_s_mem());
677 /* We need to set this so that when we have read all
678 * the data, the encrypt BIO, if present, will read
679 * EOF and encode the last few bytes */
680 BIO_set_mem_eof_return(bio,0);
682 if (data_body->length > 0)
683 BIO_write(bio,(char *)data_body->data,data_body->length);
685 if (data_body->length > 0)
686 bio = BIO_new_mem_buf(data_body->data,data_body->length);
688 bio=BIO_new(BIO_s_mem());
689 BIO_set_mem_eof_return(bio,0);
703 OPENSSL_cleanse(ek,eklen);
708 OPENSSL_cleanse(tkey,tkeylen);
711 if (out != NULL) BIO_free_all(out);
712 if (btmp != NULL) BIO_free_all(btmp);
713 if (etmp != NULL) BIO_free_all(etmp);
714 if (bio != NULL) BIO_free_all(bio);
720 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
724 bio=BIO_find_type(bio,BIO_TYPE_MD);
727 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
730 BIO_get_md_ctx(bio,pmd);
733 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
736 if (EVP_MD_CTX_type(*pmd) == nid)
743 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
745 unsigned char md_data[EVP_MAX_MD_SIZE];
748 /* Add signing time if not already present */
749 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime))
751 if (!PKCS7_add0_attrib_signing_time(si, NULL))
753 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB,
754 ERR_R_MALLOC_FAILURE);
760 if (!EVP_DigestFinal_ex(mctx, md_data,&md_len))
762 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
765 if (!PKCS7_add1_attrib_digest(si, md_data, md_len))
767 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
771 /* Now sign the attributes */
772 if (!PKCS7_SIGNER_INFO_sign(si))
779 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
784 PKCS7_SIGNER_INFO *si;
785 EVP_MD_CTX *mdc,ctx_tmp;
786 STACK_OF(X509_ATTRIBUTE) *sk;
787 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
788 ASN1_OCTET_STRING *os=NULL;
791 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
795 if (p7->d.ptr == NULL) {
796 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
800 EVP_MD_CTX_init(&ctx_tmp);
801 i=OBJ_obj2nid(p7->type);
802 p7->state=PKCS7_S_HEADER;
809 case NID_pkcs7_signedAndEnveloped:
810 /* XXXXXXXXXXXXXXXX */
811 si_sk=p7->d.signed_and_enveloped->signer_info;
812 os = p7->d.signed_and_enveloped->enc_data->enc_data;
815 os=M_ASN1_OCTET_STRING_new();
818 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
821 p7->d.signed_and_enveloped->enc_data->enc_data=os;
824 case NID_pkcs7_enveloped:
825 /* XXXXXXXXXXXXXXXX */
826 os = p7->d.enveloped->enc_data->enc_data;
829 os=M_ASN1_OCTET_STRING_new();
832 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
835 p7->d.enveloped->enc_data->enc_data=os;
838 case NID_pkcs7_signed:
839 si_sk=p7->d.sign->signer_info;
840 os=PKCS7_get_octet_string(p7->d.sign->contents);
841 /* If detached data then the content is excluded */
842 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
843 M_ASN1_OCTET_STRING_free(os);
845 p7->d.sign->contents->d.data = NULL;
849 case NID_pkcs7_digest:
850 os=PKCS7_get_octet_string(p7->d.digest->contents);
851 /* If detached data then the content is excluded */
852 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
854 M_ASN1_OCTET_STRING_free(os);
856 p7->d.digest->contents->d.data = NULL;
861 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
867 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
869 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
870 if (si->pkey == NULL)
873 j = OBJ_obj2nid(si->digest_alg->algorithm);
877 btmp = PKCS7_find_digest(&mdc, btmp, j);
882 /* We now have the EVP_MD_CTX, lets do the
884 if (!EVP_MD_CTX_copy_ex(&ctx_tmp,mdc))
889 /* If there are attributes, we add the digest
890 * attribute and only sign the attributes */
891 if (sk_X509_ATTRIBUTE_num(sk) > 0)
893 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
898 unsigned char *abuf = NULL;
899 unsigned int abuflen;
900 abuflen = EVP_PKEY_size(si->pkey);
901 abuf = OPENSSL_malloc(abuflen);
905 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen,
908 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
912 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
916 else if (i == NID_pkcs7_digest) {
917 unsigned char md_data[EVP_MAX_MD_SIZE];
919 if (!PKCS7_find_digest(&mdc, bio,
920 OBJ_obj2nid(p7->d.digest->md->algorithm)))
922 if (!EVP_DigestFinal_ex(mdc,md_data,&md_len))
924 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
927 if (!PKCS7_is_detached(p7)) {
929 * NOTE(emilia): I think we only reach os == NULL here because detached
930 * digested data support is broken.
934 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
937 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
939 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
942 contlen = BIO_get_mem_data(btmp, &cont);
944 * Mark the BIO read only then we can use its copy of the data
945 * instead of making an extra copy.
947 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
948 BIO_set_mem_eof_return(btmp, 0);
949 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
954 EVP_MD_CTX_cleanup(&ctx_tmp);
958 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
962 unsigned char *abuf = NULL;
965 const EVP_MD *md = NULL;
967 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
971 EVP_MD_CTX_init(&mctx);
972 if (EVP_DigestSignInit(&mctx, &pctx, md,NULL, si->pkey) <= 0)
975 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
976 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0)
978 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
982 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr,&abuf,
983 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
986 if (EVP_DigestSignUpdate(&mctx,abuf,alen) <= 0)
990 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
992 abuf = OPENSSL_malloc(siglen);
995 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
998 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
999 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0)
1001 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
1005 EVP_MD_CTX_cleanup(&mctx);
1007 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
1014 EVP_MD_CTX_cleanup(&mctx);
1019 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
1020 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
1022 PKCS7_ISSUER_AND_SERIAL *ias;
1024 STACK_OF(X509) *cert;
1028 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
1032 if (p7->d.ptr == NULL) {
1033 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
1037 if (PKCS7_type_is_signed(p7))
1039 cert=p7->d.sign->cert;
1041 else if (PKCS7_type_is_signedAndEnveloped(p7))
1043 cert=p7->d.signed_and_enveloped->cert;
1047 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
1050 /* XXXXXXXXXXXXXXXXXXXXXXX */
1051 ias=si->issuer_and_serial;
1053 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
1055 /* were we able to find the cert in passed to us */
1058 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
1063 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
1065 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
1068 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
1069 i=X509_verify_cert(ctx);
1072 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
1073 X509_STORE_CTX_cleanup(ctx);
1076 X509_STORE_CTX_cleanup(ctx);
1078 return PKCS7_signatureVerify(bio, p7, si, x509);
1083 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
1086 ASN1_OCTET_STRING *os;
1087 EVP_MD_CTX mdc_tmp,*mdc;
1090 STACK_OF(X509_ATTRIBUTE) *sk;
1094 EVP_MD_CTX_init(&mdc_tmp);
1096 if (!PKCS7_type_is_signed(p7) &&
1097 !PKCS7_type_is_signedAndEnveloped(p7)) {
1098 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1099 PKCS7_R_WRONG_PKCS7_TYPE);
1103 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
1108 if ((btmp == NULL) ||
1109 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
1111 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1112 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1115 BIO_get_md_ctx(btmp,&mdc);
1118 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1119 ERR_R_INTERNAL_ERROR);
1122 if (EVP_MD_CTX_type(mdc) == md_type)
1124 /* Workaround for some broken clients that put the signature
1125 * OID instead of the digest OID in digest_alg->algorithm
1127 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1129 btmp=BIO_next(btmp);
1132 /* mdc is the digest ctx that we want, unless there are attributes,
1133 * in which case the digest is the signed attributes */
1134 if (!EVP_MD_CTX_copy_ex(&mdc_tmp,mdc))
1138 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
1140 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1141 unsigned int md_len;
1143 ASN1_OCTET_STRING *message_digest;
1145 if (!EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len))
1147 message_digest=PKCS7_digest_from_attributes(sk);
1148 if (!message_digest)
1150 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1151 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1154 if ((message_digest->length != (int)md_len) ||
1155 (memcmp(message_digest->data,md_dat,md_len)))
1160 for (ii=0; ii<message_digest->length; ii++)
1161 printf("%02X",message_digest->data[ii]); printf(" sent\n");
1162 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
1165 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1166 PKCS7_R_DIGEST_FAILURE);
1171 if (!EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL))
1174 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1175 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1178 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,ERR_R_ASN1_LIB);
1182 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1189 pkey = X509_get_pubkey(x509);
1196 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1197 EVP_PKEY_free(pkey);
1200 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1201 PKCS7_R_SIGNATURE_FAILURE);
1208 EVP_MD_CTX_cleanup(&mdc_tmp);
1212 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1214 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1215 PKCS7_RECIP_INFO *ri;
1218 i=OBJ_obj2nid(p7->type);
1219 if (i != NID_pkcs7_signedAndEnveloped)
1221 if (p7->d.signed_and_enveloped == NULL)
1223 rsk=p7->d.signed_and_enveloped->recipientinfo;
1226 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1227 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1228 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1229 return(ri->issuer_and_serial);
1232 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1234 return(get_attribute(si->auth_attr,nid));
1237 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1239 return(get_attribute(si->unauth_attr,nid));
1242 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1249 if (!o || !sk) return(NULL);
1250 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1252 xa=sk_X509_ATTRIBUTE_value(sk,i);
1253 if (OBJ_cmp(xa->object,o) == 0)
1255 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1256 return(sk_ASN1_TYPE_value(xa->value.set,0));
1264 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1267 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1268 return astype->value.octet_string;
1271 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1272 STACK_OF(X509_ATTRIBUTE) *sk)
1276 if (p7si->auth_attr != NULL)
1277 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1278 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1279 if (p7si->auth_attr == NULL)
1281 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1283 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1284 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1291 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1295 if (p7si->unauth_attr != NULL)
1296 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1297 X509_ATTRIBUTE_free);
1298 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1299 if (p7si->unauth_attr == NULL)
1301 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1303 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1304 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1311 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1314 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1317 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1320 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1323 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1326 X509_ATTRIBUTE *attr=NULL;
1330 *sk = sk_X509_ATTRIBUTE_new_null();
1334 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1336 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1338 X509_ATTRIBUTE_free(attr);
1346 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1348 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1349 if (OBJ_obj2nid(attr->object) == nid)
1351 X509_ATTRIBUTE_free(attr);
1352 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1355 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1357 X509_ATTRIBUTE_free(attr);