crypto/dist/heimdal/lib/asn1/extra.c

   1 /*
   2  * Copyright (c) 2003 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "der_locl.h"
  35 #include "heim_asn1.h"
  36
  37 __RCSID("$Heimdal: extra.c 16672 2006-01-31 09:44:54Z lha $"
  38         "$NetBSD$");
  39
  40 int
  41 encode_heim_any(unsigned char *p, size_t len,
  42                 const heim_any *data, size_t *size)
  43 {
  44     if (data->length > len)
  45         return ASN1_OVERFLOW;
  46     p -= data->length;
  47     len -= data->length;
  48     memcpy (p+1, data->data, data->length);
  49     *size = data->length;
  50     return 0;
  51 }
  52
  53 int
  54 decode_heim_any(const unsigned char *p, size_t len,
  55                 heim_any *data, size_t *size)
  56 {
  57     size_t len_len, length, l;
  58     Der_class thisclass;
  59     Der_type thistype;
  60     unsigned int thistag;
  61     int e;
  62
  63     memset(data, 0, sizeof(*data));
  64
  65     e = der_get_tag (p, len, &thisclass, &thistype, &thistag, &l);
  66     if (e) return e;
  67     if (l > len)
  68         return ASN1_OVERFLOW;
  69     e = der_get_length(p + l, len - l, &length, &len_len);
  70     if (e) return e;
  71     if (length + len_len + l > len)
  72         return ASN1_OVERFLOW;
  73
  74     data->data = malloc(length + len_len + l);
  75     if (data->data == NULL)
  76         return ENOMEM;
  77     data->length = length + len_len + l;
  78     memcpy(data->data, p, length + len_len + l);
  79
  80     if (size)
  81         *size = length + len_len + l;
  82
  83     return 0;
  84 }
  85
  86 void
  87 free_heim_any(heim_any *data)
  88 {
  89     free(data->data);
  90     data->data = NULL;
  91 }
  92
  93 size_t
  94 length_heim_any(const heim_any *data)
  95 {
  96     return data->length;
  97 }
  98
  99 int
 100 copy_heim_any(const heim_any *from, heim_any *to)
 101 {
 102     to->data = malloc(from->length);
 103     if (to->data == NULL && from->length != 0)
 104         return ENOMEM;
 105     memcpy(to->data, from->data, from->length);
 106     to->length = from->length;
 107     return 0;
 108 }
 109
 110 int
 111 encode_heim_any_set(unsigned char *p, size_t len,
 112                     const heim_any_set *data, size_t *size)
 113 {
 114     return encode_heim_any(p, len, data, size);
 115 }
 116
 117
 118 int
 119 decode_heim_any_set(const unsigned char *p, size_t len,
 120                 heim_any_set *data, size_t *size)
 121 {
 122     memset(data, 0, sizeof(*data));
 123     data->data = malloc(len);
 124     if (data->data == NULL && len != 0)
 125         return ENOMEM;
 126     data->length = len;
 127     memcpy(data->data, p, len);
 128     if (size) *size = len;
 129     return 0;
 130 }
 131
 132 void
 133 free_heim_any_set(heim_any_set *data)
 134 {
 135     free_heim_any(data);
 136 }
 137
 138 size_t
 139 length_heim_any_set(const heim_any *data)
 140 {
 141     return length_heim_any(data);
 142 }
 143
 144 int
 145 copy_heim_any_set(const heim_any_set *from, heim_any_set *to)
 146 {
 147     return copy_heim_any(from, to);
 148 }
 149
 150 int
 151 heim_any_cmp(const heim_any_set *p, const heim_any_set *q)
 152 {
 153     if (p->length != q->length)
 154         return p->length - q->length;
 155     return memcmp(p->data, q->data, p->length);
 156 }