159 lines
4.0 KiB
C
159 lines
4.0 KiB
C
/*
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* Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Kungliga Tekniska
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* Högskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* Almost all programs use these routines (implicitly) so it's a good
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* place to put the version string. */
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#include "version.h"
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#include "krb_locl.h"
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RCSID("$Id: rw.c,v 1.10 1999/06/29 21:18:08 bg Exp $");
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int
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krb_get_int(void *f, u_int32_t *to, int size, int lsb)
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{
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int i;
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unsigned char *from = (unsigned char *)f;
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*to = 0;
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if(lsb){
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for(i = size-1; i >= 0; i--)
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*to = (*to << 8) | from[i];
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}else{
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for(i = 0; i < size; i++)
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*to = (*to << 8) | from[i];
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}
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return size;
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}
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int
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krb_put_int(u_int32_t from, void *to, size_t rem, int size)
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{
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int i;
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unsigned char *p = (unsigned char *)to;
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if (rem < size)
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return -1;
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for(i = size - 1; i >= 0; i--){
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p[i] = from & 0xff;
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from >>= 8;
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}
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return size;
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}
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/* addresses are always sent in network byte order */
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int
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krb_get_address(void *from, u_int32_t *to)
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{
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unsigned char *p = (unsigned char*)from;
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*to = htonl((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
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return 4;
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}
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int
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krb_put_address(u_int32_t addr, void *to, size_t rem)
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{
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return krb_put_int(ntohl(addr), to, rem, 4);
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}
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int
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krb_put_string(const char *from, void *to, size_t rem)
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{
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size_t len = strlen(from) + 1;
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if (rem < len)
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return -1;
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memcpy(to, from, len);
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return len;
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}
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int
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krb_get_string(void *from, char *to, size_t to_size)
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{
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strcpy_truncate (to, (char *)from, to_size);
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return strlen((char *)from) + 1;
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}
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int
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krb_get_nir(void *from, char *name, char *instance, char *realm)
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{
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char *p = (char *)from;
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p += krb_get_string(p, name, ANAME_SZ);
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p += krb_get_string(p, instance, INST_SZ);
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if(realm)
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p += krb_get_string(p, realm, REALM_SZ);
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return p - (char *)from;
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}
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int
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krb_put_nir(const char *name,
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const char *instance,
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const char *realm,
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void *to,
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size_t rem)
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{
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char *p = (char *)to;
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int tmp;
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tmp = krb_put_string(name, p, rem);
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if (tmp < 0)
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return tmp;
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p += tmp;
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rem -= tmp;
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tmp = krb_put_string(instance, p, rem);
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if (tmp < 0)
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return tmp;
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p += tmp;
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rem -= tmp;
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if (realm) {
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tmp = krb_put_string(realm, p, rem);
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if (tmp < 0)
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return tmp;
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p += tmp;
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rem -= tmp;
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}
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return p - (char *)to;
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}
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