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154 lines
4.2 KiB
C
154 lines
4.2 KiB
C
/*
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* Copyright (c) 2005 The SCO Group. All rights reserved.
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* Copyright (c) 2005 Tim Rice. 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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* 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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* 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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#if defined(HAVE_LIBIAF) && !defined(HAVE_SECUREWARE)
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#include <sys/types.h>
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#ifdef HAVE_CRYPT_H
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# include <crypt.h>
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#endif
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "xmalloc.h"
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#include "packet.h"
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#include "auth-options.h"
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#include "log.h"
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#include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */
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#include "servconf.h"
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#include "hostfile.h"
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#include "auth.h"
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#include "ssh.h"
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#include "ssh_api.h"
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int nischeck(char *);
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int
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sys_auth_passwd(struct ssh *ssh, const char *password)
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{
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Authctxt *authctxt = ssh->authctxt;
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struct passwd *pw = authctxt->pw;
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char *salt;
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int result;
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/* Just use the supplied fake password if authctxt is invalid */
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char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
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if (pw_password == NULL)
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return 0;
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/* Check for users with no password. */
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if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
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return (1);
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/* Encrypt the candidate password using the proper salt. */
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salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
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/*
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* Authentication is accepted if the encrypted passwords
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* are identical.
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*/
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#ifdef UNIXWARE_LONG_PASSWORDS
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if (!nischeck(pw->pw_name)) {
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result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
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|| (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
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}
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else
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#endif /* UNIXWARE_LONG_PASSWORDS */
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result = (strcmp(xcrypt(password, salt), pw_password) == 0);
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#ifdef USE_LIBIAF
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if (authctxt->valid)
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free(pw_password);
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#endif
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return(result);
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}
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#ifdef UNIXWARE_LONG_PASSWORDS
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int
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nischeck(char *namep)
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{
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char password_file[] = "/etc/passwd";
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FILE *fd;
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struct passwd *ent = NULL;
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if ((fd = fopen (password_file, "r")) == NULL) {
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/*
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* If the passwd file has disappeared we are in a bad state.
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* However, returning 0 will send us back through the
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* authentication scheme that has checked the ia database for
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* passwords earlier.
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*/
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return(0);
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}
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/*
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* fgetpwent() only reads from password file, so we know for certain
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* that the user is local.
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*/
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while (ent = fgetpwent(fd)) {
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if (strcmp (ent->pw_name, namep) == 0) {
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/* Local user */
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fclose (fd);
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return(0);
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}
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}
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fclose (fd);
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return (1);
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}
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#endif /* UNIXWARE_LONG_PASSWORDS */
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/*
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NOTE: ia_get_logpwd() allocates memory for arg 2
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functions that call shadow_pw() will need to free
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*/
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#ifdef USE_LIBIAF
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char *
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get_iaf_password(struct passwd *pw)
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{
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char *pw_password = NULL;
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uinfo_t uinfo;
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if (!ia_openinfo(pw->pw_name,&uinfo)) {
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ia_get_logpwd(uinfo, &pw_password);
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if (pw_password == NULL)
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fatal("ia_get_logpwd: Unable to get the shadow passwd");
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ia_closeinfo(uinfo);
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return pw_password;
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}
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else
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fatal("ia_openinfo: Unable to open the shadow passwd file");
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}
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#endif /* USE_LIBIAF */
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#endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */
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