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;
154 i=OBJ_obj2nid(p7->type);
155 p7->state=PKCS7_S_HEADER;
159 case NID_pkcs7_signed:
160 md_sk=p7->d.sign->md_algs;
161 os = PKCS7_get_octet_string(p7->d.sign->contents);
163 case NID_pkcs7_signedAndEnveloped:
164 rsk=p7->d.signed_and_enveloped->recipientinfo;
165 md_sk=p7->d.signed_and_enveloped->md_algs;
166 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
167 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
168 if (evp_cipher == NULL)
170 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
171 PKCS7_R_CIPHER_NOT_INITIALIZED);
175 case NID_pkcs7_enveloped:
176 rsk=p7->d.enveloped->recipientinfo;
177 xalg=p7->d.enveloped->enc_data->algorithm;
178 evp_cipher=p7->d.enveloped->enc_data->cipher;
179 if (evp_cipher == NULL)
181 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
182 PKCS7_R_CIPHER_NOT_INITIALIZED);
186 case NID_pkcs7_digest:
187 xa = p7->d.digest->md;
188 os = PKCS7_get_octet_string(p7->d.digest->contents);
191 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
195 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
196 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
199 if (xa && !PKCS7_bio_add_digest(&out, xa))
202 if (evp_cipher != NULL)
204 unsigned char key[EVP_MAX_KEY_LENGTH];
205 unsigned char iv[EVP_MAX_IV_LENGTH];
211 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
213 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
216 BIO_get_cipher_ctx(btmp, &ctx);
217 keylen=EVP_CIPHER_key_length(evp_cipher);
218 ivlen=EVP_CIPHER_iv_length(evp_cipher);
219 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
221 if (RAND_pseudo_bytes(iv,ivlen) <= 0)
223 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
225 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
227 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
231 if (xalg->parameter == NULL) {
232 xalg->parameter = ASN1_TYPE_new();
233 if (xalg->parameter == NULL)
236 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
240 /* Lets do the pub key stuff :-) */
242 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
244 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
245 if (ri->cert == NULL)
247 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
250 if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
252 jj=EVP_PKEY_size(pkey);
254 if (max < jj) max=jj;
256 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
258 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
261 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
263 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
264 if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
266 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
270 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
274 if (!M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj))
276 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
277 ERR_R_MALLOC_FAILURE);
283 OPENSSL_cleanse(key, keylen);
294 if (PKCS7_is_detached(p7))
295 bio=BIO_new(BIO_s_null());
296 else if (os && os->length > 0)
297 bio = BIO_new_mem_buf(os->data, os->length);
300 bio=BIO_new(BIO_s_mem());
303 BIO_set_mem_eof_return(bio,0);
320 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
323 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
324 pcert->cert_info->issuer);
327 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
328 ri->issuer_and_serial->serial);
332 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
335 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
336 unsigned char *tmp=NULL;
338 ASN1_OCTET_STRING *data_body=NULL;
339 const EVP_MD *evp_md;
340 const EVP_CIPHER *evp_cipher=NULL;
341 EVP_CIPHER_CTX *evp_ctx=NULL;
342 X509_ALGOR *enc_alg=NULL;
343 STACK_OF(X509_ALGOR) *md_sk=NULL;
344 STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
345 PKCS7_RECIP_INFO *ri=NULL;
347 i=OBJ_obj2nid(p7->type);
348 p7->state=PKCS7_S_HEADER;
352 case NID_pkcs7_signed:
353 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
354 md_sk=p7->d.sign->md_algs;
356 case NID_pkcs7_signedAndEnveloped:
357 rsk=p7->d.signed_and_enveloped->recipientinfo;
358 md_sk=p7->d.signed_and_enveloped->md_algs;
359 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
360 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
361 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
362 if (evp_cipher == NULL)
364 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
368 case NID_pkcs7_enveloped:
369 rsk=p7->d.enveloped->recipientinfo;
370 enc_alg=p7->d.enveloped->enc_data->algorithm;
371 data_body=p7->d.enveloped->enc_data->enc_data;
372 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
373 if (evp_cipher == NULL)
375 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
380 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
384 /* We will be checking the signature */
387 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
389 xa=sk_X509_ALGOR_value(md_sk,i);
390 if ((btmp=BIO_new(BIO_f_md())) == NULL)
392 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
396 j=OBJ_obj2nid(xa->algorithm);
397 evp_md=EVP_get_digestbynid(j);
400 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
404 BIO_set_md(btmp,evp_md);
413 if (evp_cipher != NULL)
416 unsigned char key[EVP_MAX_KEY_LENGTH];
417 unsigned char iv[EVP_MAX_IV_LENGTH];
423 unsigned char *tkey = NULL;
427 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
429 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
433 /* It was encrypted, we need to decrypt the secret key
434 * with the private key */
436 /* Find the recipientInfo which matches the passed certificate
441 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
442 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
443 if (!pkcs7_cmp_ri(ri, pcert))
448 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
449 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
454 jj=EVP_PKEY_size(pkey);
455 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
458 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
462 /* If we haven't got a certificate try each ri in turn */
466 /* Temporary storage in case EVP_PKEY_decrypt
467 * overwrites output buffer on error.
470 tmp2 = OPENSSL_malloc(jj);
474 /* Always attempt to decrypt all cases to avoid
475 * leaking timing information about a successful
478 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
481 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
482 tret=EVP_PKEY_decrypt(tmp2,
483 M_ASN1_STRING_data(ri->enc_key),
484 M_ASN1_STRING_length(ri->enc_key),
488 memcpy(tmp, tmp2, tret);
489 OPENSSL_cleanse(tmp2, tret);
498 jj=EVP_PKEY_decrypt(tmp,
499 M_ASN1_STRING_data(ri->enc_key),
500 M_ASN1_STRING_length(ri->enc_key), pkey);
505 BIO_get_cipher_ctx(etmp,&evp_ctx);
506 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
508 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
510 /* Generate random key to counter MMA */
511 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
512 tkey = OPENSSL_malloc(tkeylen);
515 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
517 /* If we have no key use random key */
527 /* Some S/MIME clients don't use the same key
528 * and effective key length. The key length is
529 * determined by the size of the decrypted RSA key.
531 if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
533 /* As MMA defence use random key instead */
534 OPENSSL_cleanse(tmp, jj);
542 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
545 OPENSSL_cleanse(tmp,jj);
549 OPENSSL_cleanse(tkey, tkeylen);
561 if (PKCS7_is_detached(p7) || (in_bio != NULL))
568 bio=BIO_new(BIO_s_mem());
569 /* We need to set this so that when we have read all
570 * the data, the encrypt BIO, if present, will read
571 * EOF and encode the last few bytes */
572 BIO_set_mem_eof_return(bio,0);
574 if (data_body->length > 0)
575 BIO_write(bio,(char *)data_body->data,data_body->length);
577 if (data_body->length > 0)
578 bio = BIO_new_mem_buf(data_body->data,data_body->length);
580 bio=BIO_new(BIO_s_mem());
581 BIO_set_mem_eof_return(bio,0);
593 if (out != NULL) BIO_free_all(out);
594 if (btmp != NULL) BIO_free_all(btmp);
595 if (etmp != NULL) BIO_free_all(etmp);
596 if (bio != NULL) BIO_free_all(bio);
604 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
608 bio=BIO_find_type(bio,BIO_TYPE_MD);
611 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
614 BIO_get_md_ctx(bio,pmd);
617 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
620 if (EVP_MD_CTX_type(*pmd) == nid)
627 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
632 BUF_MEM *buf_mem=NULL;
634 PKCS7_SIGNER_INFO *si;
635 EVP_MD_CTX *mdc,ctx_tmp;
636 STACK_OF(X509_ATTRIBUTE) *sk;
637 STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
638 ASN1_OCTET_STRING *os=NULL;
640 EVP_MD_CTX_init(&ctx_tmp);
641 i=OBJ_obj2nid(p7->type);
642 p7->state=PKCS7_S_HEADER;
646 case NID_pkcs7_signedAndEnveloped:
647 /* XXXXXXXXXXXXXXXX */
648 si_sk=p7->d.signed_and_enveloped->signer_info;
649 if (!(os=M_ASN1_OCTET_STRING_new()))
651 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
654 p7->d.signed_and_enveloped->enc_data->enc_data=os;
656 case NID_pkcs7_enveloped:
657 /* XXXXXXXXXXXXXXXX */
658 if (!(os=M_ASN1_OCTET_STRING_new()))
660 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
663 p7->d.enveloped->enc_data->enc_data=os;
665 case NID_pkcs7_signed:
666 si_sk=p7->d.sign->signer_info;
667 os=PKCS7_get_octet_string(p7->d.sign->contents);
668 /* If detached data then the content is excluded */
669 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
670 M_ASN1_OCTET_STRING_free(os);
671 p7->d.sign->contents->d.data = NULL;
675 case NID_pkcs7_digest:
676 os=PKCS7_get_octet_string(p7->d.digest->contents);
677 /* If detached data then the content is excluded */
678 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
680 M_ASN1_OCTET_STRING_free(os);
681 p7->d.digest->contents->d.data = NULL;
689 if ((buf=BUF_MEM_new()) == NULL)
691 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
694 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
696 si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
697 if (si->pkey == NULL) continue;
699 j=OBJ_obj2nid(si->digest_alg->algorithm);
703 btmp = PKCS7_find_digest(&mdc, btmp, j);
708 /* We now have the EVP_MD_CTX, lets do the
710 EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
711 if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
713 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
719 /* If there are attributes, we add the digest
720 * attribute and only sign the attributes */
721 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
723 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
724 unsigned int md_len, alen;
725 ASN1_OCTET_STRING *digest;
726 ASN1_UTCTIME *sign_time;
727 const EVP_MD *md_tmp;
729 /* Add signing time if not already present */
730 if (!PKCS7_get_signed_attribute(si,
731 NID_pkcs9_signingTime))
733 if (!(sign_time=X509_gmtime_adj(NULL,0)))
735 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
736 ERR_R_MALLOC_FAILURE);
739 if (!PKCS7_add_signed_attribute(si,
740 NID_pkcs9_signingTime,
741 V_ASN1_UTCTIME,sign_time))
743 M_ASN1_UTCTIME_free(sign_time);
749 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
750 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
751 if (!(digest=M_ASN1_OCTET_STRING_new()))
753 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
754 ERR_R_MALLOC_FAILURE);
757 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
760 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
761 ERR_R_MALLOC_FAILURE);
762 M_ASN1_OCTET_STRING_free(digest);
765 if (!PKCS7_add_signed_attribute(si,
766 NID_pkcs9_messageDigest,
767 V_ASN1_OCTET_STRING,digest))
769 M_ASN1_OCTET_STRING_free(digest);
773 /* Now sign the attributes */
774 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
775 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
776 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
778 EVP_SignUpdate(&ctx_tmp,abuf,alen);
782 #ifndef OPENSSL_NO_DSA
783 if (si->pkey->type == EVP_PKEY_DSA)
784 ctx_tmp.digest=EVP_dss1();
786 #ifndef OPENSSL_NO_ECDSA
787 if (si->pkey->type == EVP_PKEY_EC)
788 ctx_tmp.digest=EVP_ecdsa();
791 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
792 (unsigned int *)&buf->length,si->pkey))
794 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
797 if (!ASN1_STRING_set(si->enc_digest,
798 (unsigned char *)buf->data,buf->length))
800 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
805 else if (i == NID_pkcs7_digest)
807 unsigned char md_data[EVP_MAX_MD_SIZE];
809 if (!PKCS7_find_digest(&mdc, bio,
810 OBJ_obj2nid(p7->d.digest->md->algorithm)))
812 EVP_DigestFinal_ex(mdc,md_data,&md_len);
813 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
816 if (!PKCS7_is_detached(p7))
818 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
821 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
824 BIO_get_mem_ptr(btmp,&buf_mem);
825 /* Mark the BIO read only then we can use its copy of the data
826 * instead of making an extra copy.
828 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
829 BIO_set_mem_eof_return(btmp, 0);
830 os->data = (unsigned char *)buf_mem->data;
831 os->length = buf_mem->length;
833 M_ASN1_OCTET_STRING_set(os,
834 (unsigned char *)buf_mem->data,buf_mem->length);
839 EVP_MD_CTX_cleanup(&ctx_tmp);
840 if (buf != NULL) BUF_MEM_free(buf);
844 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
845 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
847 PKCS7_ISSUER_AND_SERIAL *ias;
849 STACK_OF(X509) *cert;
852 if (PKCS7_type_is_signed(p7))
854 cert=p7->d.sign->cert;
856 else if (PKCS7_type_is_signedAndEnveloped(p7))
858 cert=p7->d.signed_and_enveloped->cert;
862 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
865 /* XXXXXXXXXXXXXXXXXXXXXXX */
866 ias=si->issuer_and_serial;
868 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
870 /* were we able to find the cert in passed to us */
873 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
878 if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
880 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
883 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
884 i=X509_verify_cert(ctx);
887 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
888 X509_STORE_CTX_cleanup(ctx);
891 X509_STORE_CTX_cleanup(ctx);
893 return PKCS7_signatureVerify(bio, p7, si, x509);
898 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
901 ASN1_OCTET_STRING *os;
902 EVP_MD_CTX mdc_tmp,*mdc;
905 STACK_OF(X509_ATTRIBUTE) *sk;
909 EVP_MD_CTX_init(&mdc_tmp);
911 if (!PKCS7_type_is_signed(p7) &&
912 !PKCS7_type_is_signedAndEnveloped(p7)) {
913 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
914 PKCS7_R_WRONG_PKCS7_TYPE);
918 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
923 if ((btmp == NULL) ||
924 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
926 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
927 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
930 BIO_get_md_ctx(btmp,&mdc);
933 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
934 ERR_R_INTERNAL_ERROR);
937 if (EVP_MD_CTX_type(mdc) == md_type)
939 /* Workaround for some broken clients that put the signature
940 * OID instead of the digest OID in digest_alg->algorithm
942 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
947 /* mdc is the digest ctx that we want, unless there are attributes,
948 * in which case the digest is the signed attributes */
949 EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
952 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
954 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
955 unsigned int md_len, alen;
956 ASN1_OCTET_STRING *message_digest;
958 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
959 message_digest=PKCS7_digest_from_attributes(sk);
962 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
963 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
966 if ((message_digest->length != (int)md_len) ||
967 (memcmp(message_digest->data,md_dat,md_len)))
972 for (ii=0; ii<message_digest->length; ii++)
973 printf("%02X",message_digest->data[ii]); printf(" sent\n");
974 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
977 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
978 PKCS7_R_DIGEST_FAILURE);
983 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
985 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
986 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
987 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
993 pkey = X509_get_pubkey(x509);
999 #ifndef OPENSSL_NO_DSA
1000 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
1002 #ifndef OPENSSL_NO_ECDSA
1003 if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
1006 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
1007 EVP_PKEY_free(pkey);
1010 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1011 PKCS7_R_SIGNATURE_FAILURE);
1018 EVP_MD_CTX_cleanup(&mdc_tmp);
1022 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1024 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1025 PKCS7_RECIP_INFO *ri;
1028 i=OBJ_obj2nid(p7->type);
1029 if (i != NID_pkcs7_signedAndEnveloped)
1031 if (p7->d.signed_and_enveloped == NULL)
1033 rsk=p7->d.signed_and_enveloped->recipientinfo;
1036 ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1037 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1038 ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1039 return(ri->issuer_and_serial);
1042 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1044 return(get_attribute(si->auth_attr,nid));
1047 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1049 return(get_attribute(si->unauth_attr,nid));
1052 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1059 if (!o || !sk) return(NULL);
1060 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1062 xa=sk_X509_ATTRIBUTE_value(sk,i);
1063 if (OBJ_cmp(xa->object,o) == 0)
1065 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1066 return(sk_ASN1_TYPE_value(xa->value.set,0));
1074 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1077 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1078 return astype->value.octet_string;
1081 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1082 STACK_OF(X509_ATTRIBUTE) *sk)
1086 if (p7si->auth_attr != NULL)
1087 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1088 p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1089 if (p7si->auth_attr == NULL)
1091 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1093 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1094 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1101 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1105 if (p7si->unauth_attr != NULL)
1106 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1107 X509_ATTRIBUTE_free);
1108 p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1109 if (p7si->unauth_attr == NULL)
1111 for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1113 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1114 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1121 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1124 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1127 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1130 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1133 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1136 X509_ATTRIBUTE *attr=NULL;
1140 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1143 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1145 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1147 X509_ATTRIBUTE_free(attr);
1155 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1157 attr=sk_X509_ATTRIBUTE_value(*sk,i);
1158 if (OBJ_obj2nid(attr->object) == nid)
1160 X509_ATTRIBUTE_free(attr);
1161 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1164 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1166 X509_ATTRIBUTE_free(attr);