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>
65 static int add_attribute(STACK **sk, int nid, int atrtype, void *value);
66 static ASN1_TYPE *get_attribute(STACK *sk, int nid);
69 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
72 BIO *out=NULL,*btmp=NULL;
75 const EVP_CIPHER *evp_cipher=NULL;
76 STACK *md_sk=NULL,*rsk=NULL;
77 X509_ALGOR *xalg=NULL;
78 PKCS7_RECIP_INFO *ri=NULL;
81 i=OBJ_obj2nid(p7->type);
82 p7->state=PKCS7_S_HEADER;
86 case NID_pkcs7_signed:
87 md_sk=p7->d.sign->md_algs;
89 case NID_pkcs7_signedAndEnveloped:
90 rsk=p7->d.signed_and_enveloped->recipientinfo;
91 md_sk=p7->d.signed_and_enveloped->md_algs;
92 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.signed_and_enveloped->enc_data->algorithm->algorithm)));
93 if (evp_cipher == NULL)
95 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
98 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
100 case NID_pkcs7_enveloped:
101 rsk=p7->d.enveloped->recipientinfo;
102 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.enveloped->enc_data->algorithm->algorithm)));
103 if (evp_cipher == NULL)
105 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
108 xalg=p7->d.enveloped->enc_data->algorithm;
111 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
117 for (i=0; i<sk_num(md_sk); i++)
119 xa=(X509_ALGOR *)sk_value(md_sk,i);
120 if ((btmp=BIO_new(BIO_f_md())) == NULL)
122 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
126 j=OBJ_obj2nid(xa->algorithm);
127 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
130 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
134 BIO_set_md(btmp,evp_md);
143 if (evp_cipher != NULL)
145 unsigned char key[EVP_MAX_KEY_LENGTH];
146 unsigned char iv[EVP_MAX_IV_LENGTH];
151 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
153 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
156 keylen=EVP_CIPHER_key_length(evp_cipher);
157 ivlen=EVP_CIPHER_iv_length(evp_cipher);
161 BIO_get_cipher_ctx(btmp, &ctx);
162 if (xalg->parameter == NULL)
163 xalg->parameter=ASN1_TYPE_new();
164 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
167 RAND_bytes(key,keylen);
169 /* Lets do the pub key stuff :-) */
171 for (i=0; i<sk_num(rsk); i++)
173 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
174 if (ri->cert == NULL)
176 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
179 pkey=X509_get_pubkey(ri->cert);
180 jj=EVP_PKEY_size(pkey);
182 if (max < jj) max=jj;
184 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
186 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
189 for (i=0; i<sk_num(rsk); i++)
191 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
192 pkey=X509_get_pubkey(ri->cert);
193 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
197 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
201 ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
205 BIO_set_cipher(btmp,evp_cipher,key,iv,1);
214 if (bio == NULL) /* ??????????? */
217 bio=BIO_new(BIO_s_null());
220 bio=BIO_new(BIO_s_mem());
221 /* We need to set this so that when we have read all
222 * the data, the encrypt BIO, if present, will read
223 * EOF and encode the last few bytes */
224 BIO_set_mem_eof_return(bio,0);
226 if (PKCS7_type_is_signed(p7) &&
227 PKCS7_type_is_data(p7->d.sign->contents))
229 ASN1_OCTET_STRING *os;
231 os=p7->d.sign->contents->d.data;
233 BIO_write(bio,(char *)os->data,
253 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio,
257 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
260 ASN1_OCTET_STRING *data_body=NULL;
261 const EVP_MD *evp_md;
262 const EVP_CIPHER *evp_cipher=NULL;
263 EVP_CIPHER_CTX *evp_ctx=NULL;
264 X509_ALGOR *enc_alg=NULL;
265 STACK *md_sk=NULL,*rsk=NULL;
266 X509_ALGOR *xalg=NULL;
267 PKCS7_RECIP_INFO *ri=NULL;
268 /* EVP_PKEY *pkey; */
270 X509_STORE_CTX s_ctx;
273 i=OBJ_obj2nid(p7->type);
274 p7->state=PKCS7_S_HEADER;
278 case NID_pkcs7_signed:
279 data_body=p7->d.sign->contents->d.data;
280 md_sk=p7->d.sign->md_algs;
282 case NID_pkcs7_signedAndEnveloped:
283 rsk=p7->d.signed_and_enveloped->recipientinfo;
284 md_sk=p7->d.signed_and_enveloped->md_algs;
285 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
286 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
287 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
288 if (evp_cipher == NULL)
290 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
293 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
295 case NID_pkcs7_enveloped:
296 rsk=p7->d.enveloped->recipientinfo;
297 enc_alg=p7->d.enveloped->enc_data->algorithm;
298 data_body=p7->d.enveloped->enc_data->enc_data;
299 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
300 if (evp_cipher == NULL)
302 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
305 xalg=p7->d.enveloped->enc_data->algorithm;
308 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
312 /* We will be checking the signature */
315 for (i=0; i<sk_num(md_sk); i++)
317 xa=(X509_ALGOR *)sk_value(md_sk,i);
318 if ((btmp=BIO_new(BIO_f_md())) == NULL)
320 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
324 j=OBJ_obj2nid(xa->algorithm);
325 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
328 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
332 BIO_set_md(btmp,evp_md);
341 if (evp_cipher != NULL)
344 unsigned char key[EVP_MAX_KEY_LENGTH];
345 unsigned char iv[EVP_MAX_IV_LENGTH];
353 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
355 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
359 /* It was encrypted, we need to decrypt the secret key
360 * with the private key */
362 /* We need to find a private key for one of the people in the
363 * recipentinfo list */
367 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
369 X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
370 for (i=0; i<sk_num(rsk); i++)
372 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
373 uf (X509_STORE_get_by_issuer_serial(&s_ctx,
375 ri->issuer_and_serial->issuer,
376 ri->issuer_and_serial->serial,
381 if (ri == NULL) return(NULL);
389 jj=EVP_PKEY_size(pkey);
393 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
397 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
398 ASN1_STRING_data(ri->enc_key),
399 ASN1_STRING_length(ri->enc_key),
403 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
408 BIO_get_cipher_ctx(etmp,&evp_ctx);
409 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
410 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
413 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
415 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
418 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
430 if (p7->detached || (in_bio != NULL))
436 bio=BIO_new(BIO_s_mem());
437 /* We need to set this so that when we have read all
438 * the data, the encrypt BIO, if present, will read
439 * EOF and encode the last few bytes */
440 BIO_set_mem_eof_return(bio,0);
442 if (data_body->length > 0)
443 BIO_write(bio,(char *)data_body->data,data_body->length);
451 if (out != NULL) BIO_free_all(out);
452 if (btmp != NULL) BIO_free_all(btmp);
453 if (etmp != NULL) BIO_free_all(etmp);
454 if (bio != NULL) BIO_free_all(bio);
463 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
468 BUF_MEM *buf_mem=NULL;
470 PKCS7_SIGNER_INFO *si;
471 EVP_MD_CTX *mdc,ctx_tmp;
472 STACK *sk,*si_sk=NULL;
473 unsigned char *p,*pp=NULL;
475 ASN1_OCTET_STRING *os=NULL;
477 i=OBJ_obj2nid(p7->type);
478 p7->state=PKCS7_S_HEADER;
482 case NID_pkcs7_signedAndEnveloped:
483 /* XXXXXXXXXXXXXXXX */
484 si_sk=p7->d.signed_and_enveloped->signer_info;
485 os=ASN1_OCTET_STRING_new();
486 p7->d.signed_and_enveloped->enc_data->enc_data=os;
488 case NID_pkcs7_enveloped:
489 /* XXXXXXXXXXXXXXXX */
490 os=ASN1_OCTET_STRING_new();
491 p7->d.enveloped->enc_data->enc_data=os;
493 case NID_pkcs7_signed:
494 si_sk=p7->d.sign->signer_info;
495 os=p7->d.sign->contents->d.data;
496 /* If detached data then the content is excluded */
498 ASN1_OCTET_STRING_free(os);
499 p7->d.sign->contents->d.data = NULL;
506 if ((buf=BUF_MEM_new()) == NULL)
508 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
511 for (i=0; i<sk_num(si_sk); i++)
513 si=(PKCS7_SIGNER_INFO *)
515 if (si->pkey == NULL) continue;
517 j=OBJ_obj2nid(si->digest_alg->algorithm);
522 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
525 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
528 BIO_get_md_ctx(btmp,&mdc);
531 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
534 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
540 /* We now have the EVP_MD_CTX, lets do the
542 memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
543 if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
545 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
551 /* If there are attributes, we add the digest
552 * attribute and only sign the attributes */
553 if ((sk != NULL) && (sk_num(sk) != 0))
555 unsigned char md_data[EVP_MAX_MD_SIZE];
557 ASN1_OCTET_STRING *digest;
558 ASN1_UTCTIME *sign_time;
559 const EVP_MD *md_tmp;
561 /* Add signing time */
562 sign_time=X509_gmtime_adj(NULL,0);
563 PKCS7_add_signed_attribute(si,
564 NID_pkcs9_signingTime,
565 V_ASN1_UTCTIME,sign_time);
568 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
569 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
570 digest=ASN1_OCTET_STRING_new();
571 ASN1_OCTET_STRING_set(digest,md_data,md_len);
572 PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest,
573 V_ASN1_OCTET_STRING,digest);
575 /* Now sign the mess */
576 EVP_SignInit(&ctx_tmp,md_tmp);
577 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
578 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
579 pp=(unsigned char *)Malloc(x);
581 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
582 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
583 EVP_SignUpdate(&ctx_tmp,pp,x);
588 if (si->pkey->type == EVP_PKEY_DSA)
589 ctx_tmp.digest=EVP_dss1();
591 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
592 (unsigned int *)&buf->length,si->pkey))
594 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
597 if (!ASN1_STRING_set(si->enc_digest,
598 (unsigned char *)buf->data,buf->length))
600 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
608 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
611 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
614 BIO_get_mem_ptr(btmp,&buf_mem);
615 ASN1_OCTET_STRING_set(os,
616 (unsigned char *)buf_mem->data,buf_mem->length);
618 if (pp != NULL) Free(pp);
623 if (buf != NULL) BUF_MEM_free(buf);
627 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
628 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
630 /* PKCS7_SIGNED *s; */
631 ASN1_OCTET_STRING *os;
632 EVP_MD_CTX mdc_tmp,*mdc;
633 unsigned char *pp,*p;
634 PKCS7_ISSUER_AND_SERIAL *ias;
638 STACK_OF(X509) *cert;
643 if (PKCS7_type_is_signed(p7))
645 cert=p7->d.sign->cert;
647 else if (PKCS7_type_is_signedAndEnveloped(p7))
649 cert=p7->d.signed_and_enveloped->cert;
653 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
656 /* XXXXXXXXXXXXXXXXXXXXXXX */
657 ias=si->issuer_and_serial;
659 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
661 /* were we able to find the cert in passed to us */
664 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
669 X509_STORE_CTX_init(ctx,cert_store,x509,cert);
670 i=X509_verify_cert(ctx);
673 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
676 X509_STORE_CTX_cleanup(ctx);
678 /* So we like 'x509', lets check the signature. */
679 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
684 if ((btmp == NULL) ||
685 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
687 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
690 BIO_get_md_ctx(btmp,&mdc);
693 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
696 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
701 /* mdc is the digest ctx that we want, unless there are attributes,
702 * in which case the digest is the signed attributes */
703 memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
706 if ((sk != NULL) && (sk_num(sk) != 0))
708 unsigned char md_dat[EVP_MAX_MD_SIZE];
710 ASN1_OCTET_STRING *message_digest;
712 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
713 message_digest=PKCS7_digest_from_attributes(sk);
716 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
719 if ((message_digest->length != (int)md_len) ||
720 (memcmp(message_digest->data,md_dat,md_len)))
725 for (ii=0; ii<message_digest->length; ii++)
726 printf("%02X",message_digest->data[ii]); printf(" sent\n");
727 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
730 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
735 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
736 /* Note: when forming the encoding of the attributes we
737 * shouldn't reorder them or this will break the signature.
738 * This is done by using the IS_SEQUENCE flag.
740 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
741 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
742 pp=(unsigned char *)Malloc(i);
744 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
745 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
746 EVP_VerifyUpdate(&mdc_tmp,pp,i);
752 pkey = X509_get_pubkey(x509);
753 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
755 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
759 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
769 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
772 PKCS7_RECIP_INFO *ri;
775 i=OBJ_obj2nid(p7->type);
776 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
777 rsk=p7->d.signed_and_enveloped->recipientinfo;
778 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
779 if (sk_num(rsk) <= idx) return(NULL);
780 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
781 return(ri->issuer_and_serial);
784 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
786 return(get_attribute(si->auth_attr,nid));
789 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
791 return(get_attribute(si->unauth_attr,nid));
794 static ASN1_TYPE *get_attribute(STACK *sk, int nid)
801 if (o == NULL) return(NULL);
802 for (i=0; i<sk_num(sk); i++)
804 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
805 if (OBJ_cmp(xa->object,o) == 0)
807 if (xa->set && sk_ASN1_TYPE_num(xa->value.set))
808 return(sk_ASN1_TYPE_value(xa->value.set,0));
816 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK *sk)
818 X509_ATTRIBUTE *attr;
821 if (!sk || !sk_num(sk)) return NULL;
822 /* Search the attributes for a digest */
823 for (i = 0; i < sk_num(sk); i++)
825 attr = (X509_ATTRIBUTE *) sk_value(sk, i);
826 if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest)
828 if (!attr->set) return NULL;
830 || !sk_ASN1_TYPE_num(attr->value.set) )
832 astype = sk_ASN1_TYPE_value(attr->value.set, 0);
833 return astype->value.octet_string;
839 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk)
843 if (p7si->auth_attr != NULL)
844 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
845 p7si->auth_attr=sk_dup(sk);
846 for (i=0; i<sk_num(sk); i++)
848 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
849 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
855 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk)
859 if (p7si->unauth_attr != NULL)
860 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
861 p7si->unauth_attr=sk_dup(sk);
862 for (i=0; i<sk_num(sk); i++)
864 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
865 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
871 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
874 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
877 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
880 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
883 static int add_attribute(STACK **sk, int nid, int atrtype, void *value)
885 X509_ATTRIBUTE *attr=NULL;
891 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
892 sk_push(*sk,(char *)attr);
898 for (i=0; i<sk_num(*sk); i++)
900 attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
901 if (OBJ_obj2nid(attr->object) == nid)
903 X509_ATTRIBUTE_free(attr);
904 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
905 sk_value(*sk,i)=(char *)attr;