lib/libcrypto/asn1/x_attrib.c

   1 /* $OpenBSD: x_attrib.c,v 1.13 2015/02/14 14:56:45 jsing Exp $ */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   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.
   8  *
   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).
  15  *
  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.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  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)"
  40  *
  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
  51  * SUCH DAMAGE.
  52  *
  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.]
  57  */
  58
  59 #include <stdio.h>
  60
  61 #include <openssl/asn1t.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/x509.h>
  64
  65 /* X509_ATTRIBUTE: this has the following form:
  66  *
  67  * typedef struct x509_attributes_st
  68  *      {
  69  *      ASN1_OBJECT *object;
  70  *      int single;
  71  *      union   {
  72  *              char            *ptr;
  73  *              STACK_OF(ASN1_TYPE) *set;
  74  *              ASN1_TYPE       *single;
  75  *              } value;
  76  *      } X509_ATTRIBUTE;
  77  *
  78  * this needs some extra thought because the CHOICE type is
  79  * merged with the main structure and because the value can
  80  * be anything at all we *must* try the SET OF first because
  81  * the ASN1_ANY type will swallow anything including the whole
  82  * SET OF structure.
  83  */
  84
  85 static const ASN1_TEMPLATE X509_ATTRIBUTE_SET_ch_tt[] = {
  86         {
  87                 .flags = ASN1_TFLG_SET_OF,
  88                 .tag = 0,
  89                 .offset = offsetof(X509_ATTRIBUTE, value.set),
  90                 .field_name = "value.set",
  91                 .item = &ASN1_ANY_it,
  92         },
  93         {
  94                 .flags = 0,
  95                 .tag = 0,
  96                 .offset = offsetof(X509_ATTRIBUTE, value.single),
  97                 .field_name = "value.single",
  98                 .item = &ASN1_ANY_it,
  99         },
 100 };
 101
 102 const ASN1_ITEM X509_ATTRIBUTE_SET_it = {
 103         .itype = ASN1_ITYPE_CHOICE,
 104         .utype = offsetof(X509_ATTRIBUTE, single),
 105         .templates = X509_ATTRIBUTE_SET_ch_tt,
 106         .tcount = sizeof(X509_ATTRIBUTE_SET_ch_tt) / sizeof(ASN1_TEMPLATE),
 107         .funcs = NULL,
 108         .size = sizeof(X509_ATTRIBUTE),
 109         .sname = "X509_ATTRIBUTE",
 110 };
 111
 112 static const ASN1_TEMPLATE X509_ATTRIBUTE_seq_tt[] = {
 113         {
 114                 .flags = 0,
 115                 .tag = 0,
 116                 .offset = offsetof(X509_ATTRIBUTE, object),
 117                 .field_name = "object",
 118                 .item = &ASN1_OBJECT_it,
 119         },
 120         /* CHOICE type merged with parent */
 121         {
 122                 .flags = 0 | ASN1_TFLG_COMBINE,
 123                 .tag = 0,
 124                 .offset = 0,
 125                 .field_name = NULL,
 126                 .item = &X509_ATTRIBUTE_SET_it,
 127         },
 128 };
 129
 130 const ASN1_ITEM X509_ATTRIBUTE_it = {
 131         .itype = ASN1_ITYPE_SEQUENCE,
 132         .utype = V_ASN1_SEQUENCE,
 133         .templates = X509_ATTRIBUTE_seq_tt,
 134         .tcount = sizeof(X509_ATTRIBUTE_seq_tt) / sizeof(ASN1_TEMPLATE),
 135         .funcs = NULL,
 136         .size = sizeof(X509_ATTRIBUTE),
 137         .sname = "X509_ATTRIBUTE",
 138 };
 139
 140
 141 X509_ATTRIBUTE *
 142 d2i_X509_ATTRIBUTE(X509_ATTRIBUTE **a, const unsigned char **in, long len)
 143 {
 144         return (X509_ATTRIBUTE *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
 145             &X509_ATTRIBUTE_it);
 146 }
 147
 148 int
 149 i2d_X509_ATTRIBUTE(X509_ATTRIBUTE *a, unsigned char **out)
 150 {
 151         return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_ATTRIBUTE_it);
 152 }
 153
 154 X509_ATTRIBUTE *
 155 X509_ATTRIBUTE_new(void)
 156 {
 157         return (X509_ATTRIBUTE *)ASN1_item_new(&X509_ATTRIBUTE_it);
 158 }
 159
 160 void
 161 X509_ATTRIBUTE_free(X509_ATTRIBUTE *a)
 162 {
 163         ASN1_item_free((ASN1_VALUE *)a, &X509_ATTRIBUTE_it);
 164 }
 165
 166 X509_ATTRIBUTE *
 167 X509_ATTRIBUTE_dup(X509_ATTRIBUTE *x)
 168 {
 169         return ASN1_item_dup(&X509_ATTRIBUTE_it, x);
 170 }
 171
 172 X509_ATTRIBUTE *
 173 X509_ATTRIBUTE_create(int nid, int atrtype, void *value)
 174 {
 175         X509_ATTRIBUTE *ret = NULL;
 176         ASN1_TYPE *val = NULL;
 177
 178         if ((ret = X509_ATTRIBUTE_new()) == NULL)
 179                 return (NULL);
 180         ret->object = OBJ_nid2obj(nid);
 181         ret->single = 0;
 182         if ((ret->value.set = sk_ASN1_TYPE_new_null()) == NULL)
 183                 goto err;
 184         if ((val = ASN1_TYPE_new()) == NULL)
 185                 goto err;
 186         if (!sk_ASN1_TYPE_push(ret->value.set, val))
 187                 goto err;
 188
 189         ASN1_TYPE_set(val, atrtype, value);
 190         return (ret);
 191
 192 err:
 193         if (ret != NULL)
 194                 X509_ATTRIBUTE_free(ret);
 195         if (val != NULL)
 196                 ASN1_TYPE_free(val);
 197         return (NULL);
 198 }