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/*
* Copyright (c) 1997, 1998, 1999, 2000, 2001, 2002, 2003
* Inferno Nettverk A/S, Norway. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. The above copyright notice, this list of conditions and the following
* disclaimer must appear in all copies of the software, derivative works
* or modified versions, and any portions thereof, aswell as in all
* supporting documentation.
* 2. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Inferno Nettverk A/S, Norway.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Inferno Nettverk A/S requests users of this software to return to
*
* Software Distribution Coordinator or sdc@inet.no
* Inferno Nettverk A/S
* Oslo Research Park
* Gaustadallen 21
* NO-0349 Oslo
* Norway
*
* any improvements or extensions that they make and grant Inferno Nettverk A/S
* the rights to redistribute these changes.
*
*/
#include "common.h"
static const char rcsid[] =
"$Id: method_uname.c,v 1.36 2003/07/01 13:21:30 michaels Exp $";
int
clientmethod_uname(s, host, version)
int s;
const struct sockshost_t *host;
int version;
{
const char *function = "clientmethod_uname()";
static struct authmethod_uname_t uname; /* cached userinfo. */
static struct sockshost_t unamehost; /* host cache was gotten for. */
static int unameisok; /* cached data is ok? */
unsigned char *offset, *name, *password;
unsigned char request[ 1 /* version. */
+ 1 /* username length. */
+ MAXNAMELEN /* username. */
+ 1 /* password length. */
+ MAXPWLEN /* password. */
];
unsigned char response[ 1 /* version. */
+ 1 /* status. */
];
if (memcmp(&unamehost, host, sizeof(unamehost)) != 0)
unameisok = 0; /* not same host as cache was gotten for. */
switch (version) {
case SOCKS_V5:
break;
default:
SERRX(version);
}
/* fill in request. */
offset = request;
*offset++ = (unsigned char)SOCKS_UNAMEVERSION;
if (!unameisok) {
if ((name = (unsigned char *)socks_getusername(host, (char *)offset + 1,
MAXNAMELEN)) == NULL) {
swarn("%s: could not determine username of client", function);
return -1;
}
SASSERTX(strlen((char *)name) < sizeof(uname.name));
strcpy((char *)uname.name, (char *)name);
}
else {
name = uname.name;
strcpy((char *)offset + 1, (char *)name);
}
/* first byte gives length. */
*offset = (unsigned char)strlen((char *)name);
OCTETIFY(*offset);
offset += *offset + 1;
if (!unameisok) {
if ((password = (unsigned char *)socks_getpassword(host, (char *)name,
(char *)offset + 1, MAXPWLEN)) == NULL) {
swarn("%s: could not determine password of client", function);
return -1;
}
SASSERTX(strlen((char *)password) < sizeof(uname.password));
strcpy((char *)uname.password, (char *)password);
}
else {
password = uname.password;
strcpy((char *)offset + 1, (char *)password);
}
/* first byte gives length. */
*offset = (unsigned char)strlen((char *)password);
OCTETIFY(*offset);
offset += *offset + 1;
if (writen(s, request, (size_t)(offset - request), NULL)
!= offset - request) {
swarn("%s: writen()", function);
return -1;
}
if (readn(s, response, sizeof(response), NULL) != sizeof(response)) {
swarn("%s: readn()", function);
return -1;
}
if (request[UNAME_VERSION] != response[UNAME_VERSION]) {
swarnx("%s: sent v%d, got v%d",
function, request[UNAME_VERSION], response[UNAME_VERSION]);
return -1;
}
if (response[UNAME_STATUS] == 0) { /* server accepted. */
unamehost = *host;
unameisok = 1;
}
return response[UNAME_STATUS];
}
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