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 == ASN1_INDEFINITE) {
  71         if (len < len_len + l)
  72             return ASN1_OVERFLOW;
  73         length = len - (len_len + l);
  74     } else {
  75         if (len < length + len_len + l)
  76             return ASN1_OVERFLOW;
  77     }
  78
  79     data->data = malloc(length + len_len + l);
  80     if (data->data == NULL)
  81         return ENOMEM;
  82     data->length = length + len_len + l;
  83     memcpy(data->data, p, length + len_len + l);
  84
  85     if (size)
  86         *size = length + len_len + l;
  87
  88     return 0;
  89 }
  90
  91 void
  92 free_heim_any(heim_any *data)
  93 {
  94     free(data->data);
  95     data->data = NULL;
  96 }
  97
  98 size_t
  99 length_heim_any(const heim_any *data)
 100 {
 101     return data->length;
 102 }
 103
 104 int
 105 copy_heim_any(const heim_any *from, heim_any *to)
 106 {
 107     to->data = malloc(from->length);
 108     if (to->data == NULL && from->length != 0)
 109         return ENOMEM;
 110     memcpy(to->data, from->data, from->length);
 111     to->length = from->length;
 112     return 0;
 113 }
 114
 115 int
 116 encode_heim_any_set(unsigned char *p, size_t len,
 117                     const heim_any_set *data, size_t *size)
 118 {
 119     return encode_heim_any(p, len, data, size);
 120 }
 121
 122
 123 int
 124 decode_heim_any_set(const unsigned char *p, size_t len,
 125                 heim_any_set *data, size_t *size)
 126 {
 127     memset(data, 0, sizeof(*data));
 128     data->data = malloc(len);
 129     if (data->data == NULL && len != 0)
 130         return ENOMEM;
 131     data->length = len;
 132     memcpy(data->data, p, len);
 133     if (size) *size = len;
 134     return 0;
 135 }
 136
 137 void
 138 free_heim_any_set(heim_any_set *data)
 139 {
 140     free_heim_any(data);
 141 }
 142
 143 size_t
 144 length_heim_any_set(const heim_any *data)
 145 {
 146     return length_heim_any(data);
 147 }
 148
 149 int
 150 copy_heim_any_set(const heim_any_set *from, heim_any_set *to)
 151 {
 152     return copy_heim_any(from, to);
 153 }
 154
 155 int
 156 heim_any_cmp(const heim_any_set *p, const heim_any_set *q)
 157 {
 158     if (p->length != q->length)
 159         return p->length - q->length;
 160     return memcmp(p->data, q->data, p->length);
 161 }