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("$Id$");
  38
  39 int
  40 encode_heim_any(unsigned char *p, size_t len,
  41                 const heim_any *data, size_t *size)
  42 {
  43     if (data->length > len)
  44         return ASN1_OVERFLOW;
  45     p -= data->length;
  46     len -= data->length;
  47     memcpy (p+1, data->data, data->length);
  48     *size = data->length;
  49     return 0;
  50 }
  51
  52 int
  53 decode_heim_any(const unsigned char *p, size_t len,
  54                 heim_any *data, size_t *size)
  55 {
  56     size_t len_len, length, l;
  57     Der_class thisclass;
  58     Der_type thistype;
  59     unsigned int thistag;
  60     int e;
  61
  62     memset(data, 0, sizeof(*data));
  63
  64     e = der_get_tag (p, len, &thisclass, &thistype, &thistag, &l);
  65     if (e) return e;
  66     if (l > len)
  67         return ASN1_OVERFLOW;
  68     e = der_get_length(p + l, len - l, &length, &len_len);
  69     if (e) return e;
  70     if (length + len_len + l > len)
  71         return ASN1_OVERFLOW;
  72
  73     data->data = malloc(length + len_len + l);
  74     if (data->data == NULL)
  75         return ENOMEM;
  76     data->length = length + len_len + l;
  77     memcpy(data->data, p, length + len_len + l);
  78
  79     if (size)
  80         *size = length + len_len + l;
  81
  82     return 0;
  83 }
  84
  85 void
  86 free_heim_any(heim_any *data)
  87 {
  88     free(data->data);
  89     data->data = NULL;
  90 }
  91
  92 size_t
  93 length_heim_any(const heim_any *data)
  94 {
  95     return data->length;
  96 }
  97
  98 int
  99 copy_heim_any(const heim_any *from, heim_any *to)
 100 {
 101     to->data = malloc(from->length);
 102     if (to->data == NULL && from->length != 0)
 103         return ENOMEM;
 104     memcpy(to->data, from->data, from->length);
 105     to->length = from->length;
 106     return 0;
 107 }
 108
 109 int
 110 encode_heim_any_set(unsigned char *p, size_t len,
 111                     const heim_any_set *data, size_t *size)
 112 {
 113     return encode_heim_any(p, len, data, size);
 114 }
 115
 116
 117 int
 118 decode_heim_any_set(const unsigned char *p, size_t len,
 119                 heim_any_set *data, size_t *size)
 120 {
 121     memset(data, 0, sizeof(*data));
 122     data->data = malloc(len);
 123     if (data->data == NULL && len != 0)
 124         return ENOMEM;
 125     data->length = len;
 126     memcpy(data->data, p, len);
 127     if (size) *size = len;
 128     return 0;
 129 }
 130
 131 void
 132 free_heim_any_set(heim_any_set *data)
 133 {
 134     free_heim_any(data);
 135 }
 136
 137 size_t
 138 length_heim_any_set(const heim_any *data)
 139 {
 140     return length_heim_any(data);
 141 }
 142
 143 int
 144 copy_heim_any_set(const heim_any_set *from, heim_any_set *to)
 145 {
 146     return copy_heim_any(from, to);
 147 }
 148
 149 int
 150 heim_any_cmp(const heim_any_set *p, const heim_any_set *q)
 151 {
 152     if (p->length != q->length)
 153         return p->length - q->length;
 154     return memcmp(p->data, q->data, p->length);
 155 }