ipsec-tools/racoon/str2val.c

   1 /*      $KAME: str2val.c,v 1.11 2001/08/16 14:37:29 itojun Exp $        */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include "config.h"
  33
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <ctype.h>
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40
  41 #include "str2val.h"
  42 #include "gcmalloc.h"
  43
  44 /*
  45  * exchange a value to a hex string.
  46  * must free buffer allocated later.
  47  */
  48 caddr_t
  49 val2str(buf, mlen)
  50         const char *buf;
  51         size_t mlen;
  52 {
  53         caddr_t new;
  54         size_t len = (mlen * 2) + mlen / 8 + 10;
  55         size_t i, j;
  56
  57         if ((new = racoon_malloc(len)) == 0) return(0);
  58
  59         for (i = 0, j = 0; i < mlen; i++) {
  60                 snprintf(&new[j], len - j, "%02x", (u_char)buf[i]);
  61                 j += 2;
  62                 if (i % 8 == 7) {
  63                         new[j++] = ' ';
  64                         new[j] = '\0';
  65                 }
  66         }
  67         new[j] = '\0';
  68
  69         return(new);
  70 }
  71
  72 /*
  73  * exchange a string based "base" to a value.
  74  */
  75 char *
  76 str2val(str, base, len)
  77         const char *str;
  78         int base;
  79         size_t *len;
  80 {
  81         int f;
  82         size_t i;
  83         char *dst;
  84         char *rp;
  85         const char *p;
  86         char b[3];
  87
  88         i = 0;
  89         for (p = str; *p != '\0'; p++) {
  90                 if (isxdigit((int)*p))
  91                         i++;
  92                 else if (isspace((int)*p))
  93                         ;
  94                 else
  95                         return NULL;
  96         }
  97         if (i == 0 || (i % 2) != 0)
  98                 return NULL;
  99         i /= 2;
 100
 101         if ((dst = racoon_malloc(i)) == NULL)
 102                 return NULL;
 103
 104         i = 0;
 105         f = 0;
 106         for (rp = dst, p = str; *p != '\0'; p++) {
 107                 if (isxdigit((int)*p)) {
 108                         if (!f) {
 109                                 b[0] = *p;
 110                                 f = 1;
 111                         } else {
 112                                 b[1] = *p;
 113                                 b[2] = '\0';
 114                                 *rp++ = (char)strtol(b, NULL, base);
 115                                 i++;
 116                                 f = 0;
 117                         }
 118                 }
 119         }
 120
 121         *len = i;
 122
 123         return(dst);
 124 }