crypto/dist/ipsec-tools/src/racoon/str2val.c

   1 /*      $NetBSD$        */
   2
   3 /*      $KAME: str2val.c,v 1.11 2001/08/16 14:37:29 itojun Exp $        */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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 "config.h"
  35
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38 #include <ctype.h>
  39
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42
  43 #include "str2val.h"
  44 #include "gcmalloc.h"
  45
  46 /*
  47  * exchange a value to a hex string.
  48  * must free buffer allocated later.
  49  */
  50 caddr_t
  51 val2str(buf, mlen)
  52         const char *buf;
  53         size_t mlen;
  54 {
  55         caddr_t new;
  56         size_t len = (mlen * 2) + mlen / 8 + 10;
  57         size_t i, j;
  58
  59         if ((new = racoon_malloc(len)) == 0) return(0);
  60
  61         for (i = 0, j = 0; i < mlen; i++) {
  62                 snprintf(&new[j], len - j, "%02x", (u_char)buf[i]);
  63                 j += 2;
  64                 if (i % 8 == 7) {
  65                         new[j++] = ' ';
  66                         new[j] = '\0';
  67                 }
  68         }
  69         new[j] = '\0';
  70
  71         return(new);
  72 }
  73
  74 /*
  75  * exchange a string based "base" to a value.
  76  */
  77 char *
  78 str2val(str, base, len)
  79         const char *str;
  80         int base;
  81         size_t *len;
  82 {
  83         int f;
  84         size_t i;
  85         char *dst;
  86         char *rp;
  87         const char *p;
  88         char b[3];
  89
  90         i = 0;
  91         for (p = str; *p != '\0'; p++) {
  92                 if (isxdigit((int)*p))
  93                         i++;
  94                 else if (isspace((int)*p))
  95                         ;
  96                 else
  97                         return NULL;
  98         }
  99         if (i == 0 || (i % 2) != 0)
 100                 return NULL;
 101         i /= 2;
 102
 103         if ((dst = racoon_malloc(i)) == NULL)
 104                 return NULL;
 105
 106         i = 0;
 107         f = 0;
 108         for (rp = dst, p = str; *p != '\0'; p++) {
 109                 if (isxdigit((int)*p)) {
 110                         if (!f) {
 111                                 b[0] = *p;
 112                                 f = 1;
 113                         } else {
 114                                 b[1] = *p;
 115                                 b[2] = '\0';
 116                                 *rp++ = (char)strtol(b, NULL, base);
 117                                 i++;
 118                                 f = 0;
 119                         }
 120                 }
 121         }
 122
 123         *len = i;
 124
 125         return(dst);
 126 }