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 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.signed_and_enveloped->enc_data->algorithm->algorithm)));
92 if (evp_cipher == NULL)
94 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
97 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
99 case NID_pkcs7_enveloped:
100 rsk=p7->d.enveloped->recipientinfo;
101 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(p7->d.enveloped->enc_data->algorithm->algorithm)));
102 if (evp_cipher == NULL)
104 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
107 xalg=p7->d.enveloped->enc_data->algorithm;
110 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
116 for (i=0; i<sk_num(md_sk); i++)
118 xa=(X509_ALGOR *)sk_value(md_sk,i);
119 if ((btmp=BIO_new(BIO_f_md())) == NULL)
121 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
125 j=OBJ_obj2nid(xa->algorithm);
126 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
129 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
133 BIO_set_md(btmp,evp_md);
142 if (evp_cipher != NULL)
144 unsigned char key[EVP_MAX_KEY_LENGTH];
145 unsigned char iv[EVP_MAX_IV_LENGTH];
150 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
152 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
155 keylen=EVP_CIPHER_key_length(evp_cipher);
156 ivlen=EVP_CIPHER_iv_length(evp_cipher);
160 BIO_get_cipher_ctx(btmp, &ctx);
161 if (xalg->parameter == NULL)
162 xalg->parameter=ASN1_TYPE_new();
163 if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
166 RAND_bytes(key,keylen);
168 /* Lets do the pub key stuff :-) */
170 for (i=0; i<sk_num(rsk); i++)
172 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
173 if (ri->cert == NULL)
175 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
178 pkey=X509_get_pubkey(ri->cert);
179 jj=EVP_PKEY_size(pkey);
181 if (max < jj) max=jj;
183 if ((tmp=(unsigned char *)Malloc(max)) == NULL)
185 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
188 for (i=0; i<sk_num(rsk); i++)
190 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
191 pkey=X509_get_pubkey(ri->cert);
192 jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
196 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
200 ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj);
204 BIO_set_cipher(btmp,evp_cipher,key,iv,1);
213 if (bio == NULL) /* ??????????? */
216 bio=BIO_new(BIO_s_null());
219 bio=BIO_new(BIO_s_mem());
220 /* We need to set this so that when we have read all
221 * the data, the encrypt BIO, if present, will read
222 * EOF and encode the last few bytes */
223 BIO_set_mem_eof_return(bio,0);
225 if (PKCS7_type_is_signed(p7) &&
226 PKCS7_type_is_data(p7->d.sign->contents))
228 ASN1_OCTET_STRING *os;
230 os=p7->d.sign->contents->d.data;
232 BIO_write(bio,(char *)os->data,
252 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio,
256 BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
259 ASN1_OCTET_STRING *data_body=NULL;
260 const EVP_MD *evp_md;
261 const EVP_CIPHER *evp_cipher=NULL;
262 EVP_CIPHER_CTX *evp_ctx=NULL;
263 X509_ALGOR *enc_alg=NULL;
264 STACK *md_sk=NULL,*rsk=NULL;
265 X509_ALGOR *xalg=NULL;
266 PKCS7_RECIP_INFO *ri=NULL;
267 /* EVP_PKEY *pkey; */
269 X509_STORE_CTX s_ctx;
272 i=OBJ_obj2nid(p7->type);
273 p7->state=PKCS7_S_HEADER;
277 case NID_pkcs7_signed:
278 data_body=p7->d.sign->contents->d.data;
279 md_sk=p7->d.sign->md_algs;
281 case NID_pkcs7_signedAndEnveloped:
282 rsk=p7->d.signed_and_enveloped->recipientinfo;
283 md_sk=p7->d.signed_and_enveloped->md_algs;
284 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
285 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
286 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
287 if (evp_cipher == NULL)
289 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
292 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
294 case NID_pkcs7_enveloped:
295 rsk=p7->d.enveloped->recipientinfo;
296 enc_alg=p7->d.enveloped->enc_data->algorithm;
297 data_body=p7->d.enveloped->enc_data->enc_data;
298 evp_cipher=EVP_get_cipherbyname(OBJ_nid2sn(OBJ_obj2nid(enc_alg->algorithm)));
299 if (evp_cipher == NULL)
301 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
304 xalg=p7->d.enveloped->enc_data->algorithm;
307 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
311 /* We will be checking the signature */
314 for (i=0; i<sk_num(md_sk); i++)
316 xa=(X509_ALGOR *)sk_value(md_sk,i);
317 if ((btmp=BIO_new(BIO_f_md())) == NULL)
319 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
323 j=OBJ_obj2nid(xa->algorithm);
324 evp_md=EVP_get_digestbyname(OBJ_nid2sn(j));
327 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_UNKNOWN_DIGEST_TYPE);
331 BIO_set_md(btmp,evp_md);
340 if (evp_cipher != NULL)
343 unsigned char key[EVP_MAX_KEY_LENGTH];
344 unsigned char iv[EVP_MAX_IV_LENGTH];
352 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
354 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_BIO_LIB);
358 /* It was encrypted, we need to decrypt the secret key
359 * with the private key */
361 /* We need to find a private key for one of the people in the
362 * recipentinfo list */
366 /* FIXME: this assumes that the passed private key
367 * corresponds to the first RecipientInfo. This in
368 * general is not true
371 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
373 X509_STORE_CTX_init(&s_ctx,xs,NULL,NULL);
374 for (i=0; i<sk_num(rsk); i++)
376 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,i);
377 uf (X509_STORE_get_by_issuer_serial(&s_ctx,
379 ri->issuer_and_serial->issuer,
380 ri->issuer_and_serial->serial,
385 if (ri == NULL) return(NULL);
393 jj=EVP_PKEY_size(pkey);
397 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_MALLOC_FAILURE);
401 jj=EVP_PKEY_decrypt((unsigned char *)tmp,
402 ASN1_STRING_data(ri->enc_key),
403 ASN1_STRING_length(ri->enc_key),
407 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,ERR_R_EVP_LIB);
412 BIO_get_cipher_ctx(etmp,&evp_ctx);
413 EVP_CipherInit(evp_ctx,evp_cipher,NULL,NULL,0);
414 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
417 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx))
419 PKCS7err(PKCS7_F_PKCS7_SIGNENVELOPEDECRYPT,PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
422 EVP_CipherInit(evp_ctx,NULL,(unsigned char *)tmp,NULL,0);
434 if (p7->detached || (in_bio != NULL))
440 bio=BIO_new(BIO_s_mem());
441 /* We need to set this so that when we have read all
442 * the data, the encrypt BIO, if present, will read
443 * EOF and encode the last few bytes */
444 BIO_set_mem_eof_return(bio,0);
446 if (data_body->length > 0)
447 BIO_write(bio,(char *)data_body->data,data_body->length);
455 if (out != NULL) BIO_free_all(out);
456 if (btmp != NULL) BIO_free_all(btmp);
457 if (etmp != NULL) BIO_free_all(etmp);
458 if (bio != NULL) BIO_free_all(bio);
466 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
471 BUF_MEM *buf_mem=NULL;
473 PKCS7_SIGNER_INFO *si;
474 EVP_MD_CTX *mdc,ctx_tmp;
475 STACK *sk,*si_sk=NULL;
476 unsigned char *p,*pp=NULL;
478 ASN1_OCTET_STRING *os=NULL;
480 i=OBJ_obj2nid(p7->type);
481 p7->state=PKCS7_S_HEADER;
485 case NID_pkcs7_signedAndEnveloped:
486 /* XXXXXXXXXXXXXXXX */
487 si_sk=p7->d.signed_and_enveloped->signer_info;
488 os=ASN1_OCTET_STRING_new();
489 p7->d.signed_and_enveloped->enc_data->enc_data=os;
491 case NID_pkcs7_enveloped:
492 /* XXXXXXXXXXXXXXXX */
493 os=ASN1_OCTET_STRING_new();
494 p7->d.enveloped->enc_data->enc_data=os;
496 case NID_pkcs7_signed:
497 si_sk=p7->d.sign->signer_info;
498 os=p7->d.sign->contents->d.data;
499 /* If detached data then the content is excluded */
501 ASN1_OCTET_STRING_free(os);
502 p7->d.sign->contents->d.data = NULL;
509 if ((buf=BUF_MEM_new()) == NULL)
511 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
514 for (i=0; i<sk_num(si_sk); i++)
516 si=(PKCS7_SIGNER_INFO *)
518 if (si->pkey == NULL) continue;
520 j=OBJ_obj2nid(si->digest_alg->algorithm);
525 if ((btmp=BIO_find_type(btmp,BIO_TYPE_MD))
528 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
531 BIO_get_md_ctx(btmp,&mdc);
534 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_INTERNAL_ERROR);
537 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == j)
543 /* We now have the EVP_MD_CTX, lets do the
545 memcpy(&ctx_tmp,mdc,sizeof(ctx_tmp));
546 if (!BUF_MEM_grow(buf,EVP_PKEY_size(si->pkey)))
548 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_BIO_LIB);
554 /* If there are attributes, we add the digest
555 * attribute and only sign the attributes */
556 if ((sk != NULL) && (sk_num(sk) != 0))
558 unsigned char md_data[EVP_MAX_MD_SIZE];
560 ASN1_OCTET_STRING *digest;
561 ASN1_UTCTIME *sign_time;
562 const EVP_MD *md_tmp;
564 /* Add signing time */
565 sign_time=X509_gmtime_adj(NULL,0);
566 PKCS7_add_signed_attribute(si,
567 NID_pkcs9_signingTime,
568 V_ASN1_UTCTIME,sign_time);
571 md_tmp=EVP_MD_CTX_type(&ctx_tmp);
572 EVP_DigestFinal(&ctx_tmp,md_data,&md_len);
573 digest=ASN1_OCTET_STRING_new();
574 ASN1_OCTET_STRING_set(digest,md_data,md_len);
575 PKCS7_add_signed_attribute(si,
576 NID_pkcs9_messageDigest,
577 V_ASN1_OCTET_STRING,digest);
579 /* Now sign the mess */
580 EVP_SignInit(&ctx_tmp,md_tmp);
581 x=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
582 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
583 pp=(unsigned char *)Malloc(x);
585 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
586 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SET);
587 EVP_SignUpdate(&ctx_tmp,pp,x);
592 if (si->pkey->type == EVP_PKEY_DSA)
593 ctx_tmp.digest=EVP_dss1();
595 if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
596 (unsigned int *)&buf->length,si->pkey))
598 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_EVP_LIB);
601 if (!ASN1_STRING_set(si->enc_digest,
602 (unsigned char *)buf->data,buf->length))
604 PKCS7err(PKCS7_F_PKCS7_DATASIGN,ERR_R_ASN1_LIB);
612 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
615 PKCS7err(PKCS7_F_PKCS7_DATASIGN,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
618 BIO_get_mem_ptr(btmp,&buf_mem);
619 ASN1_OCTET_STRING_set(os,
620 (unsigned char *)buf_mem->data,buf_mem->length);
622 if (pp != NULL) Free(pp);
627 if (buf != NULL) BUF_MEM_free(buf);
631 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
632 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
634 /* PKCS7_SIGNED *s; */
635 ASN1_OCTET_STRING *os;
636 EVP_MD_CTX mdc_tmp,*mdc;
637 unsigned char *pp,*p;
638 PKCS7_ISSUER_AND_SERIAL *ias;
642 STACK_OF(X509) *cert;
647 if (PKCS7_type_is_signed(p7))
649 cert=p7->d.sign->cert;
651 else if (PKCS7_type_is_signedAndEnveloped(p7))
653 cert=p7->d.signed_and_enveloped->cert;
657 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
660 /* XXXXXXXXXXXXXXXXXXXXXXX */
661 ias=si->issuer_and_serial;
663 x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
665 /* were we able to find the cert in passed to us */
668 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
673 X509_STORE_CTX_init(ctx,cert_store,x509,cert);
674 i=X509_verify_cert(ctx);
677 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
680 X509_STORE_CTX_cleanup(ctx);
682 /* So we like 'x509', lets check the signature. */
683 md_type=OBJ_obj2nid(si->digest_alg->algorithm);
688 if ((btmp == NULL) ||
689 ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
691 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
694 BIO_get_md_ctx(btmp,&mdc);
697 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_INTERNAL_ERROR);
700 if (EVP_MD_type(EVP_MD_CTX_type(mdc)) == md_type)
705 /* mdc is the digest ctx that we want, unless there are attributes,
706 * in which case the digest is the signed attributes */
707 memcpy(&mdc_tmp,mdc,sizeof(mdc_tmp));
710 if ((sk != NULL) && (sk_num(sk) != 0))
712 unsigned char md_dat[EVP_MAX_MD_SIZE];
714 ASN1_OCTET_STRING *message_digest;
716 EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);
717 message_digest=PKCS7_digest_from_attributes(sk);
720 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
723 if ((message_digest->length != (int)md_len) ||
724 (memcmp(message_digest->data,md_dat,md_len)))
729 for (ii=0; ii<message_digest->length; ii++)
730 printf("%02X",message_digest->data[ii]); printf(" sent\n");
731 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
734 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_DIGEST_FAILURE);
739 EVP_VerifyInit(&mdc_tmp,EVP_get_digestbynid(md_type));
740 /* Note: when forming the encoding of the attributes we
741 * shouldn't reorder them or this will break the signature.
742 * This is done by using the IS_SEQUENCE flag.
744 i=i2d_ASN1_SET(sk,NULL,i2d_X509_ATTRIBUTE,
745 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
746 pp=(unsigned char *)Malloc(i);
748 i2d_ASN1_SET(sk,&p,i2d_X509_ATTRIBUTE,
749 V_ASN1_SET,V_ASN1_UNIVERSAL, IS_SEQUENCE);
750 EVP_VerifyUpdate(&mdc_tmp,pp,i);
756 pkey = X509_get_pubkey(x509);
757 if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
759 i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
763 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_SIGNATURE_FAILURE);
773 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
776 PKCS7_RECIP_INFO *ri;
779 i=OBJ_obj2nid(p7->type);
780 if (i != NID_pkcs7_signedAndEnveloped) return(NULL);
781 rsk=p7->d.signed_and_enveloped->recipientinfo;
782 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,0);
783 if (sk_num(rsk) <= idx) return(NULL);
784 ri=(PKCS7_RECIP_INFO *)sk_value(rsk,idx);
785 return(ri->issuer_and_serial);
788 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
790 return(get_attribute(si->auth_attr,nid));
793 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
795 return(get_attribute(si->unauth_attr,nid));
798 static ASN1_TYPE *get_attribute(STACK *sk, int nid)
805 if (!o || !sk) return(NULL);
806 for (i=0; i<sk_num(sk); i++)
808 xa=(X509_ATTRIBUTE *)sk_value(sk,i);
809 if (OBJ_cmp(xa->object,o) == 0)
811 if (xa->set && sk_ASN1_TYPE_num(xa->value.set))
812 return(sk_ASN1_TYPE_value(xa->value.set,0));
820 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK *sk)
823 if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
824 return astype->value.octet_string;
827 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk)
831 if (p7si->auth_attr != NULL)
832 sk_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
833 p7si->auth_attr=sk_dup(sk);
834 for (i=0; i<sk_num(sk); i++)
836 if ((sk_value(p7si->auth_attr,i)=(char *)X509_ATTRIBUTE_dup(
837 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
843 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK *sk)
847 if (p7si->unauth_attr != NULL)
848 sk_pop_free(p7si->unauth_attr,X509_ATTRIBUTE_free);
849 p7si->unauth_attr=sk_dup(sk);
850 for (i=0; i<sk_num(sk); i++)
852 if ((sk_value(p7si->unauth_attr,i)=(char *)X509_ATTRIBUTE_dup(
853 (X509_ATTRIBUTE *)sk_value(sk,i))) == NULL)
859 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
862 return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
865 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
868 return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
871 static int add_attribute(STACK **sk, int nid, int atrtype, void *value)
873 X509_ATTRIBUTE *attr=NULL;
879 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
880 sk_push(*sk,(char *)attr);
886 for (i=0; i<sk_num(*sk); i++)
888 attr=(X509_ATTRIBUTE *)sk_value(*sk,i);
889 if (OBJ_obj2nid(attr->object) == nid)
891 X509_ATTRIBUTE_free(attr);
892 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
893 sk_value(*sk,i)=(char *)attr;