auth: Remove support for plaintext auth on systems that use getprpwnam()
[nivanova/samba-autobuild/.git] / source3 / auth / pass_check.c
index 47c9664a74cd55569fa024b4f3783de75f12d048..a5e03202b88b7d5db2aadef42a5158915827e3c3 100644 (file)
-/* 
+/*
    Unix SMB/CIFS implementation.
    Password checking
    Copyright (C) Andrew Tridgell 1992-1998
-   
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
-   
+
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
-   
+
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 /* this module is for checking a username/password against a system
    password database. The SMB encrypted password support is elsewhere */
 
 #include "includes.h"
+#include "system/passwd.h"
+#include "auth.h"
 
-/* these are kept here to keep the string_combinations function simple */
-static fstring this_user;
-#if !defined(WITH_PAM) 
-static fstring this_salt;
-static fstring this_crypted;
-#endif
-
-#ifdef WITH_AFS
-
-#include <afs/stds.h>
-#include <afs/kautils.h>
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
 
-/*******************************************************************
-check on AFS authentication
-********************************************************************/
-static BOOL afs_auth(char *user, char *password)
+#if !defined(WITH_PAM)
+static char *ths_salt;
+/* This must be writable. */
+static char *get_this_salt(void)
 {
-       long password_expires = 0;
-       char *reason;
-
-       /* For versions of AFS prior to 3.3, this routine has few arguments, */
-       /* but since I can't find the old documentation... :-)               */
-       setpag();
-       if (ka_UserAuthenticateGeneral
-           (KA_USERAUTH_VERSION + KA_USERAUTH_DOSETPAG, user, (char *)0,       /* instance */
-            (char *)0,         /* cell */
-            password, 0,       /* lifetime, default */
-            &password_expires, /*days 'til it expires */
-            0,                 /* spare 2 */
-            &reason) == 0)
-       {
-               return (True);
-       }
-       DEBUG(1,
-             ("AFS authentication for \"%s\" failed (%s)\n", user, reason));
-       return (False);
+       return ths_salt;
 }
-#endif
-
-
-#ifdef WITH_DFS
-
-#include <dce/dce_error.h>
-#include <dce/sec_login.h>
 
-/*****************************************************************
- This new version of the DFS_AUTH code was donated by Karsten Muuss
- <muuss@or.uni-bonn.de>. It fixes the following problems with the
- old code :
+/* We may be setting a modified version of the same
+ * string, so don't free before use. */
 
-  - Server credentials may expire
-  - Client credential cache files have wrong owner
-  - purge_context() function is called with invalid argument
-
- This new code was modified to ensure that on exit the uid/gid is
- still root, and the original directory is restored. JRA.
-******************************************************************/
-
-sec_login_handle_t my_dce_sec_context;
-int dcelogin_atmost_once = 0;
-
-/*******************************************************************
-check on a DCE/DFS authentication
-********************************************************************/
-static BOOL dfs_auth(char *user, char *password)
+static const char *set_this_salt(const char *newsalt)
 {
-       error_status_t err;
-       int err2;
-       int prterr;
-       signed32 expire_time, current_time;
-       boolean32 password_reset;
-       struct passwd *pw;
-       sec_passwd_rec_t passwd_rec;
-       sec_login_auth_src_t auth_src = sec_login_auth_src_network;
-       unsigned char dce_errstr[dce_c_error_string_len];
-       gid_t egid;
-
-       if (dcelogin_atmost_once)
-               return (False);
-
-#ifdef HAVE_CRYPT
-       /*
-        * We only go for a DCE login context if the given password
-        * matches that stored in the local password file.. 
-        * Assumes local passwd file is kept in sync w/ DCE RGY!
-        */
-
-       if (strcmp((char *)crypt(password, this_salt), this_crypted))
-       {
-               return (False);
-       }
-#endif
-
-       sec_login_get_current_context(&my_dce_sec_context, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get current context. %s\n", dce_errstr));
-
-               return (False);
-       }
-
-       sec_login_certify_identity(my_dce_sec_context, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get current context. %s\n", dce_errstr));
-
-               return (False);
-       }
-
-       sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get expiration. %s\n", dce_errstr));
-
-               return (False);
-       }
-
-       time(&current_time);
-
-       if (expire_time < (current_time + 60))
-       {
-               struct passwd *pw;
-               sec_passwd_rec_t *key;
-
-               sec_login_get_pwent(my_dce_sec_context,
-                                   (sec_login_passwd_t *) & pw, &err);
-               if (err != error_status_ok)
-               {
-                       dce_error_inq_text(err, dce_errstr, &err2);
-                       DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
-
-                       return (False);
-               }
-
-               sec_login_refresh_identity(my_dce_sec_context, &err);
-               if (err != error_status_ok)
-               {
-                       dce_error_inq_text(err, dce_errstr, &err2);
-                       DEBUG(0, ("DCE can't refresh identity. %s\n",
-                                 dce_errstr));
-
-                       return (False);
-               }
-
-               sec_key_mgmt_get_key(rpc_c_authn_dce_secret, NULL,
-                                    (unsigned char *)pw->pw_name,
-                                    sec_c_key_version_none,
-                                    (void **)&key, &err);
-               if (err != error_status_ok)
-               {
-                       dce_error_inq_text(err, dce_errstr, &err2);
-                       DEBUG(0, ("DCE can't get key for %s. %s\n",
-                                 pw->pw_name, dce_errstr));
-
-                       return (False);
-               }
-
-               sec_login_valid_and_cert_ident(my_dce_sec_context, key,
-                                              &password_reset, &auth_src,
-                                              &err);
-               if (err != error_status_ok)
-               {
-                       dce_error_inq_text(err, dce_errstr, &err2);
-                       DEBUG(0,
-                             ("DCE can't validate and certify identity for %s. %s\n",
-                              pw->pw_name, dce_errstr));
-               }
-
-               sec_key_mgmt_free_key(key, &err);
-               if (err != error_status_ok)
-               {
-                       dce_error_inq_text(err, dce_errstr, &err2);
-                       DEBUG(0, ("DCE can't free key.\n", dce_errstr));
-               }
-       }
-
-       if (sec_login_setup_identity((unsigned char *)user,
-                                    sec_login_no_flags,
-                                    &my_dce_sec_context, &err) == 0)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE Setup Identity for %s failed: %s\n",
-                         user, dce_errstr));
-               return (False);
-       }
-
-       sec_login_get_pwent(my_dce_sec_context,
-                           (sec_login_passwd_t *) & pw, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
-
-               return (False);
-       }
-
-       sec_login_purge_context(&my_dce_sec_context, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't purge context. %s\n", dce_errstr));
-
-               return (False);
-       }
-
-       /*
-        * NB. I'd like to change these to call something like change_to_user()
-        * instead but currently we don't have a connection
-        * context to become the correct user. This is already
-        * fairly platform specific code however, so I think
-        * this should be ok. I have added code to go
-        * back to being root on error though. JRA.
-        */
-
-       egid = getegid();
-
-       set_effective_gid(pw->pw_gid);
-       set_effective_uid(pw->pw_uid);
-
-       if (sec_login_setup_identity((unsigned char *)user,
-                                    sec_login_no_flags,
-                                    &my_dce_sec_context, &err) == 0)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE Setup Identity for %s failed: %s\n",
-                         user, dce_errstr));
-               goto err;
-       }
-
-       sec_login_get_pwent(my_dce_sec_context,
-                           (sec_login_passwd_t *) & pw, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
-               goto err;
-       }
-
-       passwd_rec.version_number = sec_passwd_c_version_none;
-       passwd_rec.pepper = NULL;
-       passwd_rec.key.key_type = sec_passwd_plain;
-       passwd_rec.key.tagged_union.plain = (idl_char *) password;
-
-       sec_login_validate_identity(my_dce_sec_context,
-                                   &passwd_rec, &password_reset,
-                                   &auth_src, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0,
-                     ("DCE Identity Validation failed for principal %s: %s\n",
-                      user, dce_errstr));
-               goto err;
-       }
-
-       sec_login_certify_identity(my_dce_sec_context, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE certify identity failed: %s\n", dce_errstr));
-               goto err;
-       }
-
-       if (auth_src != sec_login_auth_src_network)
-       {
-               DEBUG(0, ("DCE context has no network credentials.\n"));
-       }
-
-       sec_login_set_context(my_dce_sec_context, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0,
-                     ("DCE login failed for principal %s, cant set context: %s\n",
-                      user, dce_errstr));
-
-               sec_login_purge_context(&my_dce_sec_context, &err);
-               goto err;
-       }
-
-       sec_login_get_pwent(my_dce_sec_context,
-                           (sec_login_passwd_t *) & pw, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
-               goto err;
-       }
-
-       DEBUG(0, ("DCE login succeeded for principal %s on pid %d\n",
-                 user, sys_getpid()));
-
-       DEBUG(3, ("DCE principal: %s\n"
-                 "          uid: %d\n"
-                 "          gid: %d\n",
-                 pw->pw_name, pw->pw_uid, pw->pw_gid));
-       DEBUG(3, ("         info: %s\n"
-                 "          dir: %s\n"
-                 "        shell: %s\n",
-                 pw->pw_gecos, pw->pw_dir, pw->pw_shell));
+       char *orig_salt = ths_salt;
+       ths_salt = SMB_STRDUP(newsalt);
+       SAFE_FREE(orig_salt);
+       return ths_salt;
+}
 
-       sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0, ("DCE can't get expiration. %s\n", dce_errstr));
-               goto err;
+static char *ths_crypted;
+static const char *get_this_crypted(void)
+{
+       if (!ths_crypted) {
+               return "";
        }
-
-       set_effective_uid(0);
-       set_effective_gid(0);
-
-       DEBUG(0,
-             ("DCE context expires: %s", asctime(localtime(&expire_time))));
-
-       dcelogin_atmost_once = 1;
-       return (True);
-
-      err:
-
-       /* Go back to root, JRA. */
-       set_effective_uid(0);
-       set_effective_gid(egid);
-       return (False);
+       return ths_crypted;
 }
 
-void dfs_unlogin(void)
+static const char *set_this_crypted(const char *newcrypted)
 {
-       error_status_t err;
-       int err2;
-       unsigned char dce_errstr[dce_c_error_string_len];
-
-       sec_login_purge_context(&my_dce_sec_context, &err);
-       if (err != error_status_ok)
-       {
-               dce_error_inq_text(err, dce_errstr, &err2);
-               DEBUG(0,
-                     ("DCE purge login context failed for server instance %d: %s\n",
-                      sys_getpid(), dce_errstr));
-       }
+       char *orig_crypted = ths_crypted;
+       ths_crypted = SMB_STRDUP(newcrypted);
+       SAFE_FREE(orig_crypted);
+       return ths_crypted;
 }
 #endif
 
+
+
+
 #ifdef LINUX_BIGCRYPT
 /****************************************************************************
 an enhanced crypt for Linux to handle password longer than 8 characters
@@ -394,149 +92,44 @@ static int linux_bigcrypt(char *password, char *salt1, char *crypted)
 }
 #endif
 
-#ifdef OSF1_ENH_SEC
-/****************************************************************************
-an enhanced crypt for OSF1
-****************************************************************************/
-static char *osf1_bigcrypt(char *password, char *salt1)
-{
-       static char result[AUTH_MAX_PASSWD_LENGTH] = "";
-       char *p1;
-       char *p2 = password;
-       char salt[3];
-       int i;
-       int parts = strlen(password) / AUTH_CLEARTEXT_SEG_CHARS;
-       if (strlen(password) % AUTH_CLEARTEXT_SEG_CHARS)
-               parts++;
-
-       StrnCpy(salt, salt1, 2);
-       StrnCpy(result, salt1, 2);
-       result[2] = '\0';
-
-       for (i = 0; i < parts; i++) {
-               p1 = crypt(p2, salt);
-               strncat(result, p1 + 2,
-                       AUTH_MAX_PASSWD_LENGTH - strlen(p1 + 2) - 1);
-               StrnCpy(salt, &result[2 + i * AUTH_CIPHERTEXT_SEG_CHARS], 2);
-               p2 += AUTH_CLEARTEXT_SEG_CHARS;
-       }
-
-       return (result);
-}
-#endif
-
-
-/****************************************************************************
-apply a function to upper/lower case combinations
-of a string and return true if one of them returns true.
-try all combinations with N uppercase letters.
-offset is the first char to try and change (start with 0)
-it assumes the string starts lowercased
-****************************************************************************/
-static NTSTATUS string_combinations2(char *s, int offset, NTSTATUS (*fn) (char *),
-                                int N)
-{
-       int len = strlen(s);
-       int i;
-       NTSTATUS nt_status;
-
-#ifdef PASSWORD_LENGTH
-       len = MIN(len, PASSWORD_LENGTH);
-#endif
-
-       if (N <= 0 || offset >= len)
-               return (fn(s));
-
-       for (i = offset; i < (len - (N - 1)); i++) {
-               char c = s[i];
-               if (!islower(c))
-                       continue;
-               s[i] = toupper(c);
-               if (!NT_STATUS_EQUAL(nt_status = string_combinations2(s, i + 1, fn, N - 1),NT_STATUS_WRONG_PASSWORD)) {
-                       return (nt_status);
-               }
-               s[i] = c;
-       }
-       return (NT_STATUS_WRONG_PASSWORD);
-}
-
-/****************************************************************************
-apply a function to upper/lower case combinations
-of a string and return true if one of them returns true.
-try all combinations with up to N uppercase letters.
-offset is the first char to try and change (start with 0)
-it assumes the string starts lowercased
-****************************************************************************/
-static NTSTATUS string_combinations(char *s, NTSTATUS (*fn) (char *), int N)
-{
-       int n;
-       NTSTATUS nt_status;
-       for (n = 1; n <= N; n++)
-               if (!NT_STATUS_EQUAL(nt_status = string_combinations2(s, 0, fn, n), NT_STATUS_WRONG_PASSWORD))
-                       return nt_status;
-       return NT_STATUS_WRONG_PASSWORD;
-}
 
 
 /****************************************************************************
 core of password checking routine
 ****************************************************************************/
-static NTSTATUS password_check(char *password)
+static NTSTATUS password_check(const char *user, const char *password, const void *private_data)
 {
 #ifdef WITH_PAM
-       return smb_pam_passcheck(this_user, password);
+       const char *rhost = (const char *)private_data;
+       return smb_pam_passcheck(user, rhost, password);
 #else
 
-       BOOL ret;
+       bool ret;
+
+
 
-#ifdef WITH_AFS
-       if (afs_auth(this_user, password))
-               return NT_STATUS_OK;
-#endif /* WITH_AFS */
 
-#ifdef WITH_DFS
-       if (dfs_auth(this_user, password))
-               return NT_STATUS_OK;
-#endif /* WITH_DFS */
-
-#ifdef OSF1_ENH_SEC
-       
-       ret = (strcmp(osf1_bigcrypt(password, this_salt),
-                     this_crypted) == 0);
-       if (!ret) {
-               DEBUG(2,
-                     ("OSF1_ENH_SEC failed. Trying normal crypt.\n"));
-               ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
-       }
-       if (ret) {
-               return NT_STATUS_OK;
-       } else {
-               return NT_STATUS_WRONG_PASSWORD;
-       }
-       
-#endif /* OSF1_ENH_SEC */
-       
 #ifdef ULTRIX_AUTH
-       ret = (strcmp((char *)crypt16(password, this_salt), this_crypted) == 0);
+       ret = (strcmp((char *)crypt16(password, get_this_salt()), get_this_crypted()) == 0);
        if (ret) {
                return NT_STATUS_OK;
         } else {
                return NT_STATUS_WRONG_PASSWORD;
        }
-       
+
 #endif /* ULTRIX_AUTH */
-       
+
 #ifdef LINUX_BIGCRYPT
-       ret = (linux_bigcrypt(password, this_salt, this_crypted));
+       ret = (linux_bigcrypt(password, get_this_salt(), get_this_crypted()));
         if (ret) {
                return NT_STATUS_OK;
        } else {
                return NT_STATUS_WRONG_PASSWORD;
        }
 #endif /* LINUX_BIGCRYPT */
-       
+
 #if defined(HAVE_BIGCRYPT) && defined(HAVE_CRYPT) && defined(USE_BOTH_CRYPT_CALLS)
-       
+
        /*
         * Some systems have bigcrypt in the C library but might not
         * actually use it for the password hashes (HPUX 10.20) is
@@ -544,31 +137,31 @@ static NTSTATUS password_check(char *password)
         * by crypt.
         */
 
-       if (strcmp(bigcrypt(password, this_salt), this_crypted) == 0)
+       if (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0)
                return NT_STATUS_OK;
        else
-               ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
+               ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
        if (ret) {
                return NT_STATUS_OK;
        } else {
                return NT_STATUS_WRONG_PASSWORD;
        }
 #else /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
-       
+
 #ifdef HAVE_BIGCRYPT
-       ret = (strcmp(bigcrypt(password, this_salt), this_crypted) == 0);
+       ret = (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0);
         if (ret) {
                return NT_STATUS_OK;
        } else {
                return NT_STATUS_WRONG_PASSWORD;
        }
 #endif /* HAVE_BIGCRYPT */
-       
+
 #ifndef HAVE_CRYPT
        DEBUG(1, ("Warning - no crypt available\n"));
        return NT_STATUS_LOGON_FAILURE;
 #else /* HAVE_CRYPT */
-       ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
+       ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
         if (ret) {
                return NT_STATUS_OK;
        } else {
@@ -576,7 +169,7 @@ static NTSTATUS password_check(char *password)
        }
 #endif /* HAVE_CRYPT */
 #endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
-#endif /* WITH_PAM || KRB4_AUTH || KRB5_AUTH */
+#endif /* WITH_PAM */
 }
 
 
@@ -588,25 +181,24 @@ match is found and is used to update the encrypted password file
 return NT_STATUS_OK on correct match, appropriate error otherwise
 ****************************************************************************/
 
-NTSTATUS pass_check(const struct passwd *input_pass, char *user, char *password, 
-                   int pwlen, BOOL (*fn) (char *, char *), BOOL run_cracker)
+NTSTATUS pass_check(const struct passwd *pass,
+                   const char *user,
+                   const char *rhost,
+                   const char *password,
+                   bool run_cracker)
 {
-       struct passwd *pass;
-       pstring pass2;
-       int level = lp_passwordlevel();
+       char *pass2 = NULL;
 
        NTSTATUS nt_status;
-       if (password)
-               password[pwlen] = 0;
 
-#if DEBUG_PASSWORD
+#ifdef DEBUG_PASSWORD
        DEBUG(100, ("checking user=[%s] pass=[%s]\n", user, password));
 #endif
 
        if (!password)
                return NT_STATUS_LOGON_FAILURE;
 
-       if (((!*password) || (!pwlen)) && !lp_null_passwords())
+       if ((!*password) && !lp_null_passwords())
                return NT_STATUS_LOGON_FAILURE;
 
 #if defined(WITH_PAM) 
@@ -616,20 +208,27 @@ NTSTATUS pass_check(const struct passwd *input_pass, char *user, char *password,
         * checks below and dive straight into the PAM code.
         */
 
-       fstrcpy(this_user, user);
-
-       DEBUG(4, ("pass_check: Checking (PAM) password for user %s (l=%d)\n", user, pwlen));
+       DEBUG(4, ("pass_check: Checking (PAM) password for user %s\n", user));
 
 #else /* Not using PAM */
 
-       DEBUG(4, ("pass_check: Checking password for user %s (l=%d)\n", user, pwlen));
+       DEBUG(4, ("pass_check: Checking password for user %s\n", user));
 
-       if (!input_pass) {
+       if (!pass) {
                DEBUG(3, ("Couldn't find user %s\n", user));
                return NT_STATUS_NO_SUCH_USER;
        }
 
-       pass = make_modifyable_passwd(input_pass);
+
+       /* Copy into global for the convenience of looping code */
+       /* Also the place to keep the 'password' no matter what
+          crazy struct it started in... */
+       if (set_this_crypted(pass->pw_passwd) == NULL) {
+               return NT_STATUS_NO_MEMORY;
+       }
+       if (set_this_salt(pass->pw_passwd) == NULL) {
+               return NT_STATUS_NO_MEMORY;
+       }
 
 #ifdef HAVE_GETSPNAM
        {
@@ -641,8 +240,14 @@ NTSTATUS pass_check(const struct passwd *input_pass, char *user, char *password,
                   perhaps for IPC password changing requests */
 
                spass = getspnam(pass->pw_name);
-               if (spass && spass->sp_pwdp)
-                       pstrcpy(pass->pw_passwd, spass->sp_pwdp);
+               if (spass && spass->sp_pwdp) {
+                       if (set_this_crypted(spass->sp_pwdp) == NULL) {
+                               return NT_STATUS_NO_MEMORY;
+                       }
+                       if (set_this_salt(spass->sp_pwdp) == NULL) {
+                               return NT_STATUS_NO_MEMORY;
+                       }
+               }
        }
 #elif defined(IA_UINFO)
        {
@@ -656,88 +261,67 @@ NTSTATUS pass_check(const struct passwd *input_pass, char *user, char *password,
        }
 #endif
 
-#ifdef HAVE_GETPRPWNAM
-       {
-               struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
-               if (pr_pw && pr_pw->ufld.fd_encrypt)
-                       pstrcpy(pass->pw_passwd, pr_pw->ufld.fd_encrypt);
-       }
-#endif
 
 #ifdef HAVE_GETPWANAM
        {
                struct passwd_adjunct *pwret;
                pwret = getpwanam(s);
-               if (pwret && pwret->pwa_passwd)
-                       pstrcpy(pass->pw_passwd,pwret->pwa_passwd);
-       }
-#endif
-
-#ifdef OSF1_ENH_SEC
-       {
-               struct pr_passwd *mypasswd;
-               DEBUG(5, ("Checking password for user %s in OSF1_ENH_SEC\n",
-                         user));
-               mypasswd = getprpwnam(user);
-               if (mypasswd) {
-                       fstrcpy(pass->pw_name, mypasswd->ufld.fd_name);
-                       fstrcpy(pass->pw_passwd, mypasswd->ufld.fd_encrypt);
-               } else {
-                       DEBUG(5,
-                             ("OSF1_ENH_SEC: No entry for user %s in protected database !\n",
-                              user));
+               if (pwret && pwret->pwa_passwd) {
+                       if (set_this_crypted(pwret->pwa_passwd) == NULL) {
+                               return NT_STATUS_NO_MEMORY;
+                       }
                }
        }
 #endif
 
+
 #ifdef ULTRIX_AUTH
        {
                AUTHORIZATION *ap = getauthuid(pass->pw_uid);
                if (ap) {
-                       fstrcpy(pass->pw_passwd, ap->a_password);
+                       if (set_this_crypted(ap->a_password) == NULL) {
+                               endauthent();
+                               return NT_STATUS_NO_MEMORY;
+                       }
                        endauthent();
                }
        }
 #endif
 
-       /* extract relevant info */
-       fstrcpy(this_salt, pass->pw_passwd);
-
 #if defined(HAVE_TRUNCATED_SALT)
        /* crypt on some platforms (HPUX in particular)
           won't work with more than 2 salt characters. */
-       this_salt[2] = 0;
+       {
+               char *trunc_salt = get_this_salt();
+               if (!trunc_salt || strlen(trunc_salt) < 2) {
+                       return NT_STATUS_LOGON_FAILURE;
+               }
+               trunc_salt[2] = 0;
+               if (set_this_salt(trunc_salt) == NULL) {
+                       return NT_STATUS_NO_MEMORY;
+               }
+       }
 #endif
 
-       /* Copy into global for the convenience of looping code */
-       fstrcpy(this_crypted, pass->pw_passwd);
-
-       if (!*this_crypted) {
+       if (!get_this_crypted() || !*get_this_crypted()) {
                if (!lp_null_passwords()) {
                        DEBUG(2, ("Disallowing %s with null password\n",
-                                 this_user));
-                       passwd_free(&pass);
+                                 user));
                        return NT_STATUS_LOGON_FAILURE;
                }
                if (!*password) {
                        DEBUG(3,
                              ("Allowing access to %s with null password\n",
-                              this_user));
-                       passwd_free(&pass);
+                              user));
                        return NT_STATUS_OK;
                }
        }
 
-       passwd_free(&pass);
-
 #endif /* defined(WITH_PAM) */
 
        /* try it as it came to us */
-       nt_status = password_check(password);
+       nt_status = password_check(user, password, (const void *)rhost);
         if NT_STATUS_IS_OK(nt_status) {
-                if (fn) {
-                        fn(user, password);
-               }
                return (nt_status);
        } else if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD)) {
                 /* No point continuing if its not the password thats to blame (ie PAM disabled). */
@@ -752,42 +336,25 @@ NTSTATUS pass_check(const struct passwd *input_pass, char *user, char *password,
         * need to proceed as we know it hasn't been case modified by the
         * client */
        if (strhasupper(password) && strhaslower(password)) {
-               passwd_free(&pass);
                return nt_status;
        }
 
        /* make a copy of it */
-       StrnCpy(pass2, password, sizeof(pstring) - 1);
+       pass2 = talloc_strdup(talloc_tos(), password);
+       if (!pass2) {
+               return NT_STATUS_NO_MEMORY;
+       }
 
        /* try all lowercase if it's currently all uppercase */
-       if (strhasupper(password)) {
-               strlower(password);
-               if NT_STATUS_IS_OK(nt_status = password_check(password)) {
-                       if (fn)
-                               fn(user, password);
+       if (strhasupper(pass2)) {
+               if (!strlower_m(pass2)) {
+                       return NT_STATUS_INVALID_PARAMETER;
+               }
+               nt_status = password_check(user, pass2, (const void *)rhost);
+               if (NT_STATUS_IS_OK(nt_status)) {
                        return (nt_status);
                }
        }
 
-       /* give up? */
-       if (level < 1) {
-               /* restore it */
-               fstrcpy(password, pass2);
-               return NT_STATUS_WRONG_PASSWORD;
-       }
-
-       /* last chance - all combinations of up to level chars upper! */
-       strlower(password);
-
-        if NT_STATUS_IS_OK(nt_status = string_combinations(password, password_check, level)) {
-                if (fn)
-                       fn(user, password);
-               return nt_status;
-       }
-        
-       /* restore it */
-       fstrcpy(password, pass2);
-
        return NT_STATUS_WRONG_PASSWORD;
 }