rxkad/rw.c

   1 /*
   2  * Copyright (c) 1995 - 2000 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 /* Almost all programs use these routines (implicitly) so it's a good
  35  * place to put the version string. */
  36
  37 #include "rxkad_locl.h"
  38
  39 RCSID("$Id$");
  40
  41 #ifndef HAVE_KRB4
  42 #include "krb4.h"
  43
  44 int
  45 krb4_get_int(void *f, u_int32_t *to, int size, int lsb)
  46 {
  47     int i;
  48     unsigned char *from = (unsigned char *)f;
  49
  50     *to = 0;
  51     if(lsb){
  52         for(i = size-1; i >= 0; i--)
  53             *to = (*to << 8) | from[i];
  54     }else{
  55         for(i = 0; i < size; i++)
  56             *to = (*to << 8) | from[i];
  57     }
  58     return size;
  59 }
  60
  61 int
  62 krb4_put_int(u_int32_t from, void *to, size_t rem, int size)
  63 {
  64     int i;
  65     unsigned char *p = (unsigned char *)to;
  66
  67     if (rem < size)
  68         return -1;
  69
  70     for(i = size - 1; i >= 0; i--){
  71         p[i] = from & 0xff;
  72         from >>= 8;
  73     }
  74     return size;
  75 }
  76
  77
  78 /* addresses are always sent in network byte order */
  79
  80 int
  81 krb4_get_address(void *from, u_int32_t *to)
  82 {
  83     unsigned char *p = (unsigned char*)from;
  84     *to = htonl((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
  85     return 4;
  86 }
  87
  88 int
  89 krb4_put_address(u_int32_t addr, void *to, size_t rem)
  90 {
  91     return krb4_put_int(ntohl(addr), to, rem, 4);
  92 }
  93
  94 int
  95 krb4_put_string(const char *from, void *to, size_t rem)
  96 {
  97     size_t len = strlen(from) + 1;
  98
  99     if (rem < len)
 100         return -1;
 101     memcpy(to, from, len);
 102     return len;
 103 }
 104
 105 int
 106 krb4_get_string(void *from, char *to, size_t to_size)
 107 {
 108     strlcpy (to, (char *)from, to_size);
 109     return strlen((char *)from) + 1;
 110 }
 111
 112 int
 113 krb4_get_nir(void *from,
 114             char *name, size_t name_len,
 115             char *instance, size_t instance_len,
 116             char *realm, size_t realm_len)
 117 {
 118     char *p = (char *)from;
 119
 120     p += krb4_get_string(p, name, name_len);
 121     p += krb4_get_string(p, instance, instance_len);
 122     if(realm)
 123         p += krb4_get_string(p, realm, realm_len);
 124     return p - (char *)from;
 125 }
 126
 127 int
 128 krb4_put_nir(const char *name,
 129             const char *instance,
 130             const char *realm,
 131             void *to,
 132             size_t rem)
 133 {
 134     char *p = (char *)to;
 135     int tmp;
 136
 137     tmp = krb4_put_string(name, p, rem);
 138     if (tmp < 0)
 139         return tmp;
 140     p += tmp;
 141     rem -= tmp;
 142
 143     tmp = krb4_put_string(instance, p, rem);
 144     if (tmp < 0)
 145         return tmp;
 146     p += tmp;
 147     rem -= tmp;
 148
 149     if (realm) {
 150         tmp = krb4_put_string(realm, p, rem);
 151         if (tmp < 0)
 152             return tmp;
 153         p += tmp;
 154         rem -= tmp;
 155     }
 156     return p - (char *)to;
 157 }
 158
 159 #endif