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

   1 /*
   2  * Copyright (c) 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 <hex.h>
  36
  37 __RCSID("$Heimdal: der_format.c 20861 2007-06-03 20:18:29Z lha $"
  38         "$NetBSD$");
  39
  40 int
  41 der_parse_hex_heim_integer (const char *p, heim_integer *data)
  42 {
  43     ssize_t len;
  44
  45     data->length = 0;
  46     data->negative = 0;
  47     data->data = NULL;
  48
  49     if (*p == '-') {
  50         p++;
  51         data->negative = 1;
  52     }
  53
  54     len = strlen(p);
  55     if (len <= 0) {
  56         data->data = NULL;
  57         data->length = 0;
  58         return EINVAL;
  59     }
  60
  61     data->length = (len / 2) + 1;
  62     data->data = malloc(data->length);
  63     if (data->data == NULL) {
  64         data->length = 0;
  65         return ENOMEM;
  66     }
  67
  68     len = hex_decode(p, data->data, data->length);
  69     if (len < 0) {
  70         free(data->data);
  71         data->data = NULL;
  72         data->length = 0;
  73         return EINVAL;
  74     }
  75
  76     {
  77         unsigned char *q = data->data;
  78         while(len > 0 && *q == 0) {
  79             q++;
  80             len--;
  81         }
  82         data->length = len;
  83         memmove(data->data, q, len);
  84     }
  85     return 0;
  86 }
  87
  88 int
  89 der_print_hex_heim_integer (const heim_integer *data, char **p)
  90 {
  91     ssize_t len;
  92     char *q;
  93
  94     len = hex_encode(data->data, data->length, p);
  95     if (len < 0)
  96         return ENOMEM;
  97
  98     if (data->negative) {
  99         len = asprintf(&q, "-%s", *p);
 100         free(*p);
 101         if (len < 0)
 102             return ENOMEM;
 103         *p = q;
 104     }
 105     return 0;
 106 }
 107
 108 int
 109 der_print_heim_oid (const heim_oid *oid, char delim, char **str)
 110 {
 111     struct rk_strpool *p = NULL;
 112     int i;
 113
 114     if (oid->length == 0)
 115         return EINVAL;
 116
 117     for (i = 0; i < oid->length ; i++) {
 118         p = rk_strpoolprintf(p, "%d", oid->components[i]);
 119         if (p && i < oid->length - 1)
 120             p = rk_strpoolprintf(p, "%c", delim);
 121         if (p == NULL) {
 122             *str = NULL;
 123             return ENOMEM;
 124         }
 125     }
 126
 127     *str = rk_strpoolcollect(p);
 128     if (*str == NULL)
 129         return ENOMEM;
 130     return 0;
 131 }
 132
 133 int
 134 der_parse_heim_oid (const char *str, const char *sep, heim_oid *data)
 135 {
 136     char *s, *w, *brkt, *endptr;
 137     unsigned int *c;
 138     long l;
 139
 140     data->length = 0;
 141     data->components = NULL;
 142
 143     if (sep == NULL)
 144         sep = ".";
 145
 146     s = strdup(str);
 147
 148     for (w = strtok_r(s, sep, &brkt);
 149          w != NULL;
 150          w = strtok_r(NULL, sep, &brkt)) {
 151
 152         c = realloc(data->components,
 153                     (data->length + 1) * sizeof(data->components[0]));
 154         if (c == NULL) {
 155             der_free_oid(data);
 156             free(s);
 157             return ENOMEM;
 158         }
 159         data->components = c;
 160
 161         l = strtol(w, &endptr, 10);
 162         if (*endptr != '\0' || l < 0 || l > INT_MAX) {
 163             der_free_oid(data);
 164             free(s);
 165             return EINVAL;
 166         }
 167         data->components[data->length++] = l;
 168     }
 169     free(s);
 170     return 0;
 171 }