91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2005
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authenticate user
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*/
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#include "arch.h"
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#include "os_calls.h"
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#define _XOPEN_SOURCE
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#include <unistd.h>
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#include <string.h>
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#include <shadow.h>
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#include <pwd.h>
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/******************************************************************************/
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/* returns boolean */
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int DEFAULT_CC
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auth_userpass(char* user, char* pass)
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{
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char salt[13] = "$1$";
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char hash[35] = "";
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char* encr = 0;
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struct passwd* spw;
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struct spwd* stp;
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int saltcnt = 0;
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spw = getpwnam(user);
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if (spw == 0)
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{
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return 0;
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}
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if (strncmp(spw->pw_passwd, "x", 3) == 0)
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{
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/* the system is using shadow */
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stp = getspnam(user);
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if (stp == 0)
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{
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return 0;
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}
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strncpy(hash, stp->sp_pwdp, 34);
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}
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else
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{
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/* old system with only passwd */
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strncpy(hash, spw->pw_passwd, 34);
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}
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hash[34] = '\0';
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if (strncmp(hash, "$1$", 3) == 0)
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{
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/* gnu style crypt(); */
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saltcnt = 3;
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while ((hash[saltcnt] != '$') && (saltcnt < 11))
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{
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salt[saltcnt] = hash[saltcnt];
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saltcnt++;
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}
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salt[saltcnt] = '$';
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salt[saltcnt + 1] = '\0';
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}
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else
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{
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/* classic two char salt */
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salt[0] = hash[0];
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salt[1] = hash[1];
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salt[2] = '\0';
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}
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encr = crypt(pass,salt);
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if (strncmp(encr, hash, 34) != 0)
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{
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return 0;
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}
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return 1;
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}
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