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.]
65 static int add_attribute(STACK **sk, int nid, int atrtype, char *value);
66 static ASN1_TYPE *get_attribute(STACK *sk, int nid);
69 BIO *PKCS7_dataInit(p7,bio)
74 BIO *out=NULL,*btmp=NULL;
77 EVP_CIPHER *evp_cipher=NULL;
78 STACK *md_sk=NULL,*rsk=NULL;
79 X509_ALGOR *xalg=NULL;
80 PKCS7_RECIP_INFO *ri=NULL;
83 i=OBJ_obj2nid(p7->type);
84 p7->state=PKCS7_S_HEADER;
88 case NID_pkcs7_signed:
89 md_sk=p7->d.sign->md_algs;
91 case NID_pkcs7_signedAndEnveloped:
92 rsk=p7->d.signed_and_enveloped->recipientinfo;
93 md_sk=p7->d.signed_and_enveloped->md_algs;
94 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.signed_and_enveloped->enc_data->algorithm->algorithm)));
95 if (evp_cipher == NULL)
97 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
100 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
102 case NID_pkcs7_enveloped:
103 rsk=p7->d.enveloped->recipientinfo;
104 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.enveloped->enc_data->algorithm->algorithm)));
105 if (evp_cipher == NULL)
107 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
110 xalg=p7->d.enveloped->enc_data->algorithm;
113 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
119 for (i=0; i<sk_num(md_sk); i++)
121 xa=(X509_ALGOR *)sk_value(md_sk,i);
122 if ((btmp=BIO_new(BIO_f_md())) == NULL)
124 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
128 j=OBJ_obj2nid(xa->algorithm);
129 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
132 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
136 BIO_set_md(btmp,evp_md);
145 if (evp_cipher != NULL)
147 unsigned char key[EVP_MAX_KEY_LENGTH];
148 unsigned char iv[EVP_MAX_IV_LENGTH];
153 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
155 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
158 keylen=EVP_CIPHER_key_length(evp_cipher);
159 ivlen=EVP_CIPHER_iv_length(evp_cipher);
163 ASN1_OCTET_STRING *os;
165 RAND_bytes(iv,ivlen);
166 os=ASN1_OCTET_STRING_new();
167 ASN1_OCTET_STRING_set(os,iv,ivlen);
168 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX this needs to change */
169 if (xalg->parameter == NULL)
170 xalg->parameter=ASN1_TYPE_new();
171 ASN1_TYPE_set(xalg->parameter,V_ASN1_OCTET_STRING,
174 RAND_bytes(key,keylen);
176 /* Lets do the pub key stuff :-) */
178 for (i=0; i<sk_num(rsk); i++)
180 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
181 if (ri->cert == NULL)
183 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
186 pkey=X509_get_pubkey(ri->cert);
187 jj=EVP_PKEY_size(pkey);
189 if (max < jj) max=jj;
191 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
193 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
196 for (i=0; i<sk_num(rsk); i++)
198 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
199 pkey=X509_get_pubkey(ri->cert);
200 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
204 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
208 ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
212 BIO_set_cipher(btmp,evp_cipher,key,iv,1);
221 if (bio == NULL) /* ??????????? */
224 bio=BIO_new(BIO_s_null());
227 bio=BIO_new(BIO_s_mem());
228 /* We need to set this so that when we have read all
229 * the data, the encrypt BIO, if present, will read
230 * EOF and encode the last few bytes */
231 BIO_set_mem_eof_return(bio,0);
233 if (PKCS7_type_is_signed(p7) &&
234 PKCS7_type_is_data(p7->d.sign->contents))
236 ASN1_OCTET_STRING *os;
238 os=p7->d.sign->contents->d.data;
240 BIO_write(bio,(char *)os->data,
260 BIO *PKCS7_dataDecode(p7,pkey,in_bio,xs)
267 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
270 ASN1_OCTET_STRING *data_body=NULL;
272 EVP_CIPHER *evp_cipher=NULL;
273 EVP_CIPHER_CTX *evp_ctx=NULL;
274 X509_ALGOR *enc_alg=NULL;
275 STACK *md_sk=NULL,*rsk=NULL;
276 X509_ALGOR *xalg=NULL;
277 PKCS7_RECIP_INFO *ri=NULL;
278 /* EVP_PKEY *pkey; */
280 X509_STORE_CTX s_ctx;
283 i=OBJ_obj2nid(p7->type);
284 p7->state=PKCS7_S_HEADER;
288 case NID_pkcs7_signed:
289 data_body=p7->d.sign->contents->d.data;
290 md_sk=p7->d.sign->md_algs;
292 case NID_pkcs7_signedAndEnveloped:
293 rsk=p7->d.signed_and_enveloped->recipientinfo;
294 md_sk=p7->d.signed_and_enveloped->md_algs;
295 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
296 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
297 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
298 if (evp_cipher == NULL)
300 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
303 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
305 case NID_pkcs7_enveloped:
306 rsk=p7->d.enveloped->recipientinfo;
307 enc_alg=p7->d.enveloped->enc_data->algorithm;
308 data_body=p7->d.enveloped->enc_data->enc_data;
309 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
310 if (evp_cipher == NULL)
312 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
315 xalg=p7->d.enveloped->enc_data->algorithm;
318 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
322 /* We will be checking the signature */
325 for (i=0; i<sk_num(md_sk); i++)
327 xa=(X509_ALGOR *)sk_value(md_sk,i);
328 if ((btmp=BIO_new(BIO_f_md())) == NULL)
330 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
334 j=OBJ_obj2nid(xa->algorithm);
335 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
338 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
342 BIO_set_md(btmp,evp_md);
351 if (evp_cipher != NULL)
354 unsigned char key[EVP_MAX_KEY_LENGTH];
355 unsigned char iv[EVP_MAX_IV_LENGTH];
363 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
365 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
369 /* It was encrypted, we need to decrypt the secret key
370 * with the private key */
372 /* We need to find a private key for one of the people in the
373 * recipentinfo list */
377 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
379 X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
380 for (i=0; i<sk_num(rsk); i++)
382 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
383 uf (X509_STORE_get_by_issuer_serial(&s_ctx,
385 ri->issuer_and_serial->issuer,
386 ri->issuer_and_serial->serial,
391 if (ri == NULL) return(NULL);
399 jj=EVP_PKEY_size(pkey);
403 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
407 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
408 ASN1_STRING_data(ri->enc_key),
409 ASN1_STRING_length(ri->enc_key),
413 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
418 BIO_get_cipher_ctx(etmp,&evp_ctx);
419 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
420 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
423 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
425 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
428 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
440 if (p7->detached || (in_bio != NULL))
446 bio=BIO_new(BIO_s_mem());
447 /* We need to set this so that when we have read all
448 * the data, the encrypt BIO, if present, will read
449 * EOF and encode the last few bytes */
450 BIO_set_mem_eof_return(bio,0);
452 if (data_body->length > 0)
453 BIO_write(bio,(char *)data_body->data,data_body->length);
461 if (out != NULL) BIO_free_all(out);
462 if (btmp != NULL) BIO_free_all(btmp);
463 if (etmp != NULL) BIO_free_all(etmp);
464 if (bio != NULL) BIO_free_all(bio);
473 int PKCS7_dataFinal(p7,bio)
480 BUF_MEM *buf_mem=NULL;
482 PKCS7_SIGNER_INFO *si;
483 EVP_MD_CTX *mdc,ctx_tmp;
484 STACK *sk,*si_sk=NULL;
485 unsigned char *p,*pp=NULL;
487 ASN1_OCTET_STRING *os=NULL;
489 i=OBJ_obj2nid(p7->type);
490 p7->state=PKCS7_S_HEADER;
494 case NID_pkcs7_signedAndEnveloped:
495 /* XXXXXXXXXXXXXXXX */
496 si_sk=p7->d.signed_and_enveloped->signer_info;
497 os=ASN1_OCTET_STRING_new();
498 p7->d.signed_and_enveloped->enc_data->enc_data=os;
500 case NID_pkcs7_enveloped:
501 /* XXXXXXXXXXXXXXXX */
502 os=ASN1_OCTET_STRING_new();
503 p7->d.enveloped->enc_data->enc_data=os;
505 case NID_pkcs7_signed:
506 si_sk=p7->d.sign->signer_info;
507 os=p7->d.sign->contents->d.data;
508 /* If detached data then the content is excluded */
510 ASN1_OCTET_STRING_free(os);
511 p7->d.sign->contents->d.data = NULL;
518 if ((buf=BUF_MEM_new()) == NULL)
520 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
523 for (i=0; i<sk_num(si_sk); i++)
525 si=(PKCS7_SIGNER_INFO *)
527 if (si->pkey == NULL) continue;
529 j=OBJ_obj2nid(si->digest_alg->algorithm);
534 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
537 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
540 BIO_get_md_ctx(btmp,&mdc);
543 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
546 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
552 /* We now have the EVP_MD_CTX, lets do the
554 memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
555 if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
557 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
563 /* If there are attributes, we add the digest
564 * attribute and only sign the attributes */
565 if ((sk != NULL) && (sk_num(sk) != 0))
567 unsigned char md_data[EVP_MAX_MD_SIZE];
569 ASN1_OCTET_STRING *digest;
570 ASN1_UTCTIME *sign_time;
573 /* Add signing time */
574 sign_time=X509_gmtime_adj(NULL,0);
575 PKCS7_add_signed_attribute(si,
576 NID_pkcs9_signingTime,
577 V_ASN1_UTCTIME,(char *)sign_time);
580 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
581 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
582 digest=ASN1_OCTET_STRING_new();
583 ASN1_OCTET_STRING_set(digest,md_data,md_len);
584 PKCS7_add_signed_attribute(si,NID_pkcs9_messageDigest,
585 V_ASN1_OCTET_STRING,(char *)digest);
587 /* Now sign the mess */
588 EVP_SignInit(&ctx_tmp,md_tmp);
589 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
590 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
591 pp=(unsigned char *)Malloc(x);
593 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
594 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
595 EVP_SignUpdate(&ctx_tmp,pp,x);
600 if (si->pkey->type == EVP_PKEY_DSA)
601 ctx_tmp.digest=EVP_dss1();
603 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
604 (unsigned int *)&buf->length,si->pkey))
606 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
609 if (!ASN1_STRING_set(si->enc_digest,
610 (unsigned char *)buf->data,buf->length))
612 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
620 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
623 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
626 BIO_get_mem_ptr(btmp,&buf_mem);
627 ASN1_OCTET_STRING_set(os,
628 (unsigned char *)buf_mem->data,buf_mem->length);
630 if (pp != NULL) Free(pp);
635 if (buf != NULL) BUF_MEM_free(buf);
639 int PKCS7_dataVerify(cert_store,ctx,bio,p7,si)
640 X509_STORE *cert_store;
644 PKCS7_SIGNER_INFO *si;
646 /* PKCS7_SIGNED *s; */
647 ASN1_OCTET_STRING *os;
648 EVP_MD_CTX mdc_tmp,*mdc;
649 unsigned char *pp,*p;
650 PKCS7_ISSUER_AND_SERIAL *ias;
658 if (PKCS7_type_is_signed(p7))
660 cert=p7->d.sign->cert;
662 else if (PKCS7_type_is_signedAndEnveloped(p7))
664 cert=p7->d.signed_and_enveloped->cert;
668 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
671 /* XXXXXXXXXXXXXXXXXXXXXXX */
672 ias=si->issuer_and_serial;
674 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
676 /* were we able to find the cert in passed to us */
679 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
684 X509_STORE_CTX_init(ctx,cert_store,x509,cert);
685 i=X509_verify_cert(ctx);
688 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
691 X509_STORE_CTX_cleanup(ctx);
693 /* So we like 'x509', lets check the signature. */
694 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
699 if ((btmp == NULL) ||
700 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
702 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
705 BIO_get_md_ctx(btmp,&mdc);
708 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
711 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
716 /* mdc is the digest ctx that we want, unless there are attributes,
717 * in which case the digest is the signed attributes */
718 memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
721 if ((sk != NULL) && (sk_num(sk) != 0))
723 unsigned char md_dat[EVP_MAX_MD_SIZE];
725 ASN1_OCTET_STRING *message_digest;
727 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
728 message_digest=PKCS7_digest_from_attributes(sk);
731 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
734 if ((message_digest->length != md_len) ||
735 (memcmp(message_digest->data,md_dat,md_len)))
740 for (ii=0; ii<message_digest->length; ii++)
741 printf("%02X",message_digest->data[ii]); printf(" sent\n");
742 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
745 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
750 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
751 /* Note: when forming the encoding of the attributes we
752 * shouldn't reorder them or this will break the signature.
753 * This is done by using the IS_SEQUENCE flag.
755 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
756 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
757 pp=(unsigned char *)Malloc(i);
759 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
760 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
761 EVP_VerifyUpdate(&mdc_tmp,pp,i);
767 pkey = X509_get_pubkey(x509);
768 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
770 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
774 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
784 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(p7,idx)
789 PKCS7_RECIP_INFO *ri;
792 i=OBJ_obj2nid(p7->type);
793 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
794 rsk=p7->d.signed_and_enveloped->recipientinfo;
795 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
796 if (sk_num(rsk) <= idx) return(NULL);
797 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
798 return(ri->issuer_and_serial);
801 ASN1_TYPE *PKCS7_get_signed_attribute(si,nid)
802 PKCS7_SIGNER_INFO *si;
805 return(get_attribute(si->auth_attr,nid));
808 ASN1_TYPE *PKCS7_get_attribute(si,nid)
809 PKCS7_SIGNER_INFO *si;
812 return(get_attribute(si->unauth_attr,nid));
815 static ASN1_TYPE *get_attribute(sk,nid)
824 if (o == NULL) return(NULL);
825 for (i=0; i<sk_num(sk); i++)
827 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
828 if (OBJ_cmp(xa->object,o) == 0)
830 if (xa->set && sk_num(xa->value.set))
831 return((ASN1_TYPE *)sk_value(xa->value.set,0));
839 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(sk)
842 X509_ATTRIBUTE *attr;
845 if (!sk || !sk_num(sk)) return NULL;
846 /* Search the attributes for a digest */
847 for (i = 0; i < sk_num(sk); i++)
849 attr = (X509_ATTRIBUTE *) sk_value(sk, i);
850 if (OBJ_obj2nid(attr->object) == NID_pkcs9_messageDigest)
852 if (!attr->set) return NULL;
853 if (!attr->value.set ||
854 !sk_num (attr->value.set) ) return NULL;
855 astype = (ASN1_TYPE *) sk_value(attr->value.set, 0);
856 return astype->value.octet_string;
862 int PKCS7_set_signed_attributes(p7si,sk)
863 PKCS7_SIGNER_INFO *p7si;
868 if (p7si->auth_attr != NULL)
869 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
870 p7si->auth_attr=sk_dup(sk);
871 for (i=0; i<sk_num(sk); i++)
873 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
874 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
880 int PKCS7_set_attributes(p7si,sk)
881 PKCS7_SIGNER_INFO *p7si;
886 if (p7si->unauth_attr != NULL)
887 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
888 p7si->unauth_attr=sk_dup(sk);
889 for (i=0; i<sk_num(sk); i++)
891 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
892 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
898 int PKCS7_add_signed_attribute(p7si,nid,atrtype,value)
899 PKCS7_SIGNER_INFO *p7si;
904 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
907 int PKCS7_add_attribute(p7si,nid,atrtype,value)
908 PKCS7_SIGNER_INFO *p7si;
913 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
916 static int add_attribute(sk, nid, atrtype, value)
922 X509_ATTRIBUTE *attr=NULL;
928 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
929 sk_push(*sk,(char *)attr);
935 for (i=0; i<sk_num(*sk); i++)
937 attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
938 if (OBJ_obj2nid(attr->object) == nid)
940 X509_ATTRIBUTE_free(attr);
941 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
942 sk_value(*sk,i)=(char *)attr;