More S/MIME tidy. Place some common attribute operations in utility
[openssl.git] / crypto / pkcs7 / pk7_attr.c
1 /* pk7_attr.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3  * project 2001.
4  */
5 /* ====================================================================
6  * Copyright (c) 2001-2004 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer. 
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in
17  *    the documentation and/or other materials provided with the
18  *    distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  *    software must display the following acknowledgment:
22  *    "This product includes software developed by the OpenSSL Project
23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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32  *    permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *    acknowledgment:
36  *    "This product includes software developed by the OpenSSL Project
37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * (eay@cryptsoft.com).  This product includes software written by Tim
55  * Hudson (tjh@cryptsoft.com).
56  *
57  */
58
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <openssl/bio.h>
62 #include <openssl/asn1.h>
63 #include <openssl/pem.h>
64 #include <openssl/pkcs7.h>
65 #include <openssl/x509.h>
66 #include <openssl/err.h>
67
68 int PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si, STACK_OF(X509_ALGOR) *cap)
69 {
70         ASN1_STRING *seq;
71         unsigned char *p, *pp;
72         int len;
73         len=i2d_ASN1_SET_OF_X509_ALGOR(cap,NULL,i2d_X509_ALGOR,
74                                        V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL,
75                                        IS_SEQUENCE);
76         if(!(pp=(unsigned char *)OPENSSL_malloc(len))) {
77                 PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);
78                 return 0;
79         }
80         p=pp;
81         i2d_ASN1_SET_OF_X509_ALGOR(cap,&p,i2d_X509_ALGOR, V_ASN1_SEQUENCE,
82                                    V_ASN1_UNIVERSAL, IS_SEQUENCE);
83         if(!(seq = ASN1_STRING_new())) {
84                 PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);
85                 return 0;
86         }
87         if(!ASN1_STRING_set (seq, pp, len)) {
88                 PKCS7err(PKCS7_F_PKCS7_ADD_ATTRIB_SMIMECAP,ERR_R_MALLOC_FAILURE);
89                 return 0;
90         }
91         OPENSSL_free (pp);
92         return PKCS7_add_signed_attribute(si, NID_SMIMECapabilities,
93                                                         V_ASN1_SEQUENCE, seq);
94 }
95
96 STACK_OF(X509_ALGOR) *PKCS7_get_smimecap(PKCS7_SIGNER_INFO *si)
97         {
98         ASN1_TYPE *cap;
99         const unsigned char *p;
100
101         cap = PKCS7_get_signed_attribute(si, NID_SMIMECapabilities);
102         if (!cap || (cap->type != V_ASN1_SEQUENCE))
103                 return NULL;
104         p = cap->value.sequence->data;
105         return d2i_ASN1_SET_OF_X509_ALGOR(NULL, &p,
106                                           cap->value.sequence->length,
107                                           d2i_X509_ALGOR, X509_ALGOR_free,
108                                           V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
109         }
110
111 /* Basic smime-capabilities OID and optional integer arg */
112 int PKCS7_simple_smimecap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
113 {
114         X509_ALGOR *alg;
115
116         if(!(alg = X509_ALGOR_new())) {
117                 PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
118                 return 0;
119         }
120         ASN1_OBJECT_free(alg->algorithm);
121         alg->algorithm = OBJ_nid2obj (nid);
122         if (arg > 0) {
123                 ASN1_INTEGER *nbit;
124                 if(!(alg->parameter = ASN1_TYPE_new())) {
125                         PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
126                         return 0;
127                 }
128                 if(!(nbit = ASN1_INTEGER_new())) {
129                         PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
130                         return 0;
131                 }
132                 if(!ASN1_INTEGER_set (nbit, arg)) {
133                         PKCS7err(PKCS7_F_PKCS7_SIMPLE_SMIMECAP,ERR_R_MALLOC_FAILURE);
134                         return 0;
135                 }
136                 alg->parameter->value.integer = nbit;
137                 alg->parameter->type = V_ASN1_INTEGER;
138         }
139         sk_X509_ALGOR_push (sk, alg);
140         return 1;
141 }
142
143 int PKCS7_add_attrib_content_type(PKCS7_SIGNER_INFO *si, ASN1_OBJECT *coid)
144         {
145         if (PKCS7_get_signed_attribute(si, NID_pkcs9_contentType))
146                 return 0;
147         if (!coid)
148                 coid = OBJ_nid2obj(NID_pkcs7_data);
149         return PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
150                                 V_ASN1_OBJECT, coid);
151         }
152
153 int PKCS7_add0_attrib_signing_time(PKCS7_SIGNER_INFO *si, ASN1_TIME *t)
154         {
155         if (!t && !(t=X509_gmtime_adj(NULL,0)))
156                 {
157                 PKCS7err(PKCS7_F_PKCS7_ADD0_ATTRIB_SIGNING_TIME,
158                                 ERR_R_MALLOC_FAILURE);
159                 return 0;
160                 }
161         return PKCS7_add_signed_attribute(si, NID_pkcs9_signingTime,
162                                                 V_ASN1_UTCTIME, t);
163         }
164
165 int PKCS7_add1_attrib_digest(PKCS7_SIGNER_INFO *si,
166                                 const unsigned char *md, int mdlen)
167         {
168         ASN1_OCTET_STRING *os;
169         os = ASN1_OCTET_STRING_new();
170         if (!os)
171                 return 0;
172         if (!ASN1_STRING_set(os, md, mdlen)
173                 || PKCS7_add_signed_attribute(si, NID_pkcs9_messageDigest,
174                                                 V_ASN1_OCTET_STRING, os))
175                 {
176                 ASN1_OCTET_STRING_free(os);
177                 return 0;
178                 }
179         return 1;
180         }