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);
68 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
71 BIO *out=NULL,*btmp=NULL;
74 const EVP_CIPHER *evp_cipher=NULL;
75 STACK *md_sk=NULL,*rsk=NULL;
76 X509_ALGOR *xalg=NULL;
77 PKCS7_RECIP_INFO *ri=NULL;
80 i=OBJ_obj2nid(p7->type);
81 p7->state=PKCS7_S_HEADER;
85 case NID_pkcs7_signed:
86 md_sk=p7->d.sign->md_algs;
88 case NID_pkcs7_signedAndEnveloped:
89 rsk=p7->d.signed_and_enveloped->recipientinfo;
90 md_sk=p7->d.signed_and_enveloped->md_algs;
91 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
92 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
93 if (evp_cipher == NULL)
95 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
96 PKCS7_R_CIPHER_NOT_INITIALIZED);
100 case NID_pkcs7_enveloped:
101 rsk=p7->d.enveloped->recipientinfo;
102 xalg=p7->d.enveloped->enc_data->algorithm;
103 evp_cipher=p7->d.enveloped->enc_data->cipher;
104 if (evp_cipher == NULL)
106 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
107 PKCS7_R_CIPHER_NOT_INITIALIZED);
112 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
118 for (i=0; i<sk_num(md_sk); i++)
120 xa=(X509_ALGOR *)sk_value(md_sk,i);
121 if ((btmp=BIO_new(BIO_f_md())) == NULL)
123 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
127 j=OBJ_obj2nid(xa->algorithm);
128 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
131 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
135 BIO_set_md(btmp,evp_md);
144 if (evp_cipher != NULL)
146 unsigned char key[EVP_MAX_KEY_LENGTH];
147 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 BIO_get_cipher_ctx(btmp, &ctx);
159 keylen=EVP_CIPHER_key_length(evp_cipher);
160 ivlen=EVP_CIPHER_iv_length(evp_cipher);
161 RAND_bytes(key,keylen);
162 EVP_CipherInit(ctx, evp_cipher, key, iv, 1);
163 memset(key, 0, keylen);
164 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
167 RAND_bytes(iv,ivlen);
168 if (xalg->parameter == NULL)
169 xalg->parameter=ASN1_TYPE_new();
170 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
174 /* Lets do the pub key stuff :-) */
176 for (i=0; i<sk_num(rsk); i++)
178 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
179 if (ri->cert == NULL)
181 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
184 pkey=X509_get_pubkey(ri->cert);
185 jj=EVP_PKEY_size(pkey);
187 if (max < jj) max=jj;
189 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
191 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
194 for (i=0; i<sk_num(rsk); i++)
196 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
197 pkey=X509_get_pubkey(ri->cert);
198 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
202 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
206 ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
217 if (bio == NULL) /* ??????????? */
220 bio=BIO_new(BIO_s_null());
223 bio=BIO_new(BIO_s_mem());
224 /* We need to set this so that when we have read all
225 * the data, the encrypt BIO, if present, will read
226 * EOF and encode the last few bytes */
227 BIO_set_mem_eof_return(bio,0);
229 if (PKCS7_type_is_signed(p7) &&
230 PKCS7_type_is_data(p7->d.sign->contents))
232 ASN1_OCTET_STRING *os;
234 os=p7->d.sign->contents->d.data;
236 BIO_write(bio,(char *)os->data,
256 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
259 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
262 ASN1_OCTET_STRING *data_body=NULL;
263 const EVP_MD *evp_md;
264 const EVP_CIPHER *evp_cipher=NULL;
265 EVP_CIPHER_CTX *evp_ctx=NULL;
266 X509_ALGOR *enc_alg=NULL;
267 STACK *md_sk=NULL,*rsk=NULL;
268 X509_ALGOR *xalg=NULL;
269 PKCS7_RECIP_INFO *ri=NULL;
270 /* EVP_PKEY *pkey; */
272 X509_STORE_CTX s_ctx;
275 i=OBJ_obj2nid(p7->type);
276 p7->state=PKCS7_S_HEADER;
280 case NID_pkcs7_signed:
281 data_body=p7->d.sign->contents->d.data;
282 md_sk=p7->d.sign->md_algs;
284 case NID_pkcs7_signedAndEnveloped:
285 rsk=p7->d.signed_and_enveloped->recipientinfo;
286 md_sk=p7->d.signed_and_enveloped->md_algs;
287 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
288 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
289 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
290 if (evp_cipher == NULL)
292 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
295 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
297 case NID_pkcs7_enveloped:
298 rsk=p7->d.enveloped->recipientinfo;
299 enc_alg=p7->d.enveloped->enc_data->algorithm;
300 data_body=p7->d.enveloped->enc_data->enc_data;
301 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
302 if (evp_cipher == NULL)
304 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
307 xalg=p7->d.enveloped->enc_data->algorithm;
310 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
314 /* We will be checking the signature */
317 for (i=0; i<sk_num(md_sk); i++)
319 xa=(X509_ALGOR *)sk_value(md_sk,i);
320 if ((btmp=BIO_new(BIO_f_md())) == NULL)
322 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
326 j=OBJ_obj2nid(xa->algorithm);
327 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
330 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
334 BIO_set_md(btmp,evp_md);
343 if (evp_cipher != NULL)
346 unsigned char key[EVP_MAX_KEY_LENGTH];
347 unsigned char iv[EVP_MAX_IV_LENGTH];
355 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
357 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
361 /* It was encrypted, we need to decrypt the secret key
362 * with the private key */
364 /* Find the recipientInfo which matches the passed certificate
368 for (i=0; i<sk_num(rsk); i++) {
369 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
370 if(!X509_NAME_cmp(ri->issuer_and_serial->issuer,
371 pcert->cert_info->issuer) &&
372 !ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
373 ri->issuer_and_serial->serial)) break;
377 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
378 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
382 jj=EVP_PKEY_size(pkey);
386 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
390 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
391 ASN1_STRING_data(ri->enc_key),
392 ASN1_STRING_length(ri->enc_key),
396 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_EVP_LIB);
401 BIO_get_cipher_ctx(etmp,&evp_ctx);
402 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
403 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
406 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
408 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
409 PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
412 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
424 if (p7->detached || (in_bio != NULL))
430 bio=BIO_new(BIO_s_mem());
431 /* We need to set this so that when we have read all
432 * the data, the encrypt BIO, if present, will read
433 * EOF and encode the last few bytes */
434 BIO_set_mem_eof_return(bio,0);
436 if (data_body->length > 0)
437 BIO_write(bio,(char *)data_body->data,data_body->length);
445 if (out != NULL) BIO_free_all(out);
446 if (btmp != NULL) BIO_free_all(btmp);
447 if (etmp != NULL) BIO_free_all(etmp);
448 if (bio != NULL) BIO_free_all(bio);
456 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
461 BUF_MEM *buf_mem=NULL;
463 PKCS7_SIGNER_INFO *si;
464 EVP_MD_CTX *mdc,ctx_tmp;
465 STACK *sk,*si_sk=NULL;
466 unsigned char *p,*pp=NULL;
468 ASN1_OCTET_STRING *os=NULL;
470 i=OBJ_obj2nid(p7->type);
471 p7->state=PKCS7_S_HEADER;
475 case NID_pkcs7_signedAndEnveloped:
476 /* XXXXXXXXXXXXXXXX */
477 si_sk=p7->d.signed_and_enveloped->signer_info;
478 os=ASN1_OCTET_STRING_new();
479 p7->d.signed_and_enveloped->enc_data->enc_data=os;
481 case NID_pkcs7_enveloped:
482 /* XXXXXXXXXXXXXXXX */
483 os=ASN1_OCTET_STRING_new();
484 p7->d.enveloped->enc_data->enc_data=os;
486 case NID_pkcs7_signed:
487 si_sk=p7->d.sign->signer_info;
488 os=p7->d.sign->contents->d.data;
489 /* If detached data then the content is excluded */
491 ASN1_OCTET_STRING_free(os);
492 p7->d.sign->contents->d.data = NULL;
499 if ((buf=BUF_MEM_new()) == NULL)
501 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
504 for (i=0; i<sk_num(si_sk); i++)
506 si=(PKCS7_SIGNER_INFO *)
508 if (si->pkey == NULL) continue;
510 j=OBJ_obj2nid(si->digest_alg->algorithm);
515 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
518 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
521 BIO_get_md_ctx(btmp,&mdc);
524 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
527 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
533 /* We now have the EVP_MD_CTX, lets do the
535 memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
536 if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
538 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
544 /* If there are attributes, we add the digest
545 * attribute and only sign the attributes */
546 if ((sk != NULL) && (sk_num(sk) != 0))
548 unsigned char md_data[EVP_MAX_MD_SIZE];
550 ASN1_OCTET_STRING *digest;
551 ASN1_UTCTIME *sign_time;
552 const EVP_MD *md_tmp;
554 /* Add signing time */
555 sign_time=X509_gmtime_adj(NULL,0);
556 PKCS7_add_signed_attribute(si,
557 NID_pkcs9_signingTime,
558 V_ASN1_UTCTIME,sign_time);
561 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
562 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
563 digest=ASN1_OCTET_STRING_new();
564 ASN1_OCTET_STRING_set(digest,md_data,md_len);
565 PKCS7_add_signed_attribute(si,
566 NID_pkcs9_messageDigest,
567 V_ASN1_OCTET_STRING,digest);
569 /* Now sign the mess */
570 EVP_SignInit(&ctx_tmp,md_tmp);
571 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
572 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
573 pp=(unsigned char *)Malloc(x);
575 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
576 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
577 EVP_SignUpdate(&ctx_tmp,pp,x);
582 if (si->pkey->type == EVP_PKEY_DSA)
583 ctx_tmp.digest=EVP_dss1();
585 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
586 (unsigned int *)&buf->length,si->pkey))
588 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
591 if (!ASN1_STRING_set(si->enc_digest,
592 (unsigned char *)buf->data,buf->length))
594 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
602 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
605 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
608 BIO_get_mem_ptr(btmp,&buf_mem);
609 ASN1_OCTET_STRING_set(os,
610 (unsigned char *)buf_mem->data,buf_mem->length);
612 if (pp != NULL) Free(pp);
617 if (buf != NULL) BUF_MEM_free(buf);
621 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
622 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
624 /* PKCS7_SIGNED *s; */
625 ASN1_OCTET_STRING *os;
626 EVP_MD_CTX mdc_tmp,*mdc;
627 unsigned char *pp,*p;
628 PKCS7_ISSUER_AND_SERIAL *ias;
632 STACK_OF(X509) *cert;
637 if (PKCS7_type_is_signed(p7))
639 cert=p7->d.sign->cert;
641 else if (PKCS7_type_is_signedAndEnveloped(p7))
643 cert=p7->d.signed_and_enveloped->cert;
647 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
650 /* XXXXXXXXXXXXXXXXXXXXXXX */
651 ias=si->issuer_and_serial;
653 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
655 /* were we able to find the cert in passed to us */
658 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
663 X509_STORE_CTX_init(ctx,cert_store,x509,cert);
664 i=X509_verify_cert(ctx);
667 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
670 X509_STORE_CTX_cleanup(ctx);
672 /* So we like 'x509', lets check the signature. */
673 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
678 if ((btmp == NULL) ||
679 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
681 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
684 BIO_get_md_ctx(btmp,&mdc);
687 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
690 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
695 /* mdc is the digest ctx that we want, unless there are attributes,
696 * in which case the digest is the signed attributes */
697 memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
700 if ((sk != NULL) && (sk_num(sk) != 0))
702 unsigned char md_dat[EVP_MAX_MD_SIZE];
704 ASN1_OCTET_STRING *message_digest;
706 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
707 message_digest=PKCS7_digest_from_attributes(sk);
710 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
713 if ((message_digest->length != (int)md_len) ||
714 (memcmp(message_digest->data,md_dat,md_len)))
719 for (ii=0; ii<message_digest->length; ii++)
720 printf("%02X",message_digest->data[ii]); printf(" sent\n");
721 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
724 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
729 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
730 /* Note: when forming the encoding of the attributes we
731 * shouldn't reorder them or this will break the signature.
732 * This is done by using the IS_SEQUENCE flag.
734 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
735 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
736 pp=(unsigned char *)Malloc(i);
738 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
739 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
740 EVP_VerifyUpdate(&mdc_tmp,pp,i);
746 pkey = X509_get_pubkey(x509);
747 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
749 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
753 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
763 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
766 PKCS7_RECIP_INFO *ri;
769 i=OBJ_obj2nid(p7->type);
770 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
771 rsk=p7->d.signed_and_enveloped->recipientinfo;
772 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
773 if (sk_num(rsk) <= idx) return(NULL);
774 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
775 return(ri->issuer_and_serial);
778 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
780 return(get_attribute(si->auth_attr,nid));
783 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
785 return(get_attribute(si->unauth_attr,nid));
788 static ASN1_TYPE *get_attribute(STACK *sk, int nid)
795 if (!o || !sk) return(NULL);
796 for (i=0; i<sk_num(sk); i++)
798 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
799 if (OBJ_cmp(xa->object,o) == 0)
801 if (xa->set && sk_ASN1_TYPE_num(xa->value.set))
802 return(sk_ASN1_TYPE_value(xa->value.set,0));
810 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK *sk)
813 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
814 return astype->value.octet_string;
817 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk)
821 if (p7si->auth_attr != NULL)
822 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
823 p7si->auth_attr=sk_dup(sk);
824 for (i=0; i<sk_num(sk); i++)
826 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
827 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
833 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk)
837 if (p7si->unauth_attr != NULL)
838 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
839 p7si->unauth_attr=sk_dup(sk);
840 for (i=0; i<sk_num(sk); i++)
842 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
843 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
849 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
852 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
855 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
858 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
861 static int add_attribute(STACK **sk, int nid, int atrtype, void *value)
863 X509_ATTRIBUTE *attr=NULL;
869 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
870 sk_push(*sk,(char *)attr);
876 for (i=0; i<sk_num(*sk); i++)
878 attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
879 if (OBJ_obj2nid(attr->object) == nid)
881 X509_ATTRIBUTE_free(attr);
882 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
883 sk_value(*sk,i)=(char *)attr;