-/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+/*
+ 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
#include "includes.h"
-extern int DEBUGLEVEL;
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/* what is the longest significant password available on your system?
+ Knowing this speeds up password searches a lot */
+#ifndef PASSWORD_LENGTH
+#define PASSWORD_LENGTH 8
+#endif
/* these are kept here to keep the string_combinations function simple */
-static char this_user[100] = "";
-static char this_salt[100] = "";
-static char this_crypted[100] = "";
+static char *ths_user;
+
+static const char *get_this_user(void)
+{
+ if (!ths_user) {
+ return "";
+ }
+ return ths_user;
+}
+
+#if defined(WITH_PAM) || defined(OSF1_ENH_SEC)
+static const char *set_this_user(const char *newuser)
+{
+ char *orig_user = ths_user;
+ ths_user = SMB_STRDUP(newuser);
+ SAFE_FREE(orig_user);
+ return ths_user;
+}
+#endif
+
+#if !defined(WITH_PAM)
+static char *ths_salt;
+/* This must be writable. */
+static char *get_this_salt(void)
+{
+ return ths_salt;
+}
+
+/* We may be setting a modified version of the same
+ * string, so don't free before use. */
+
+static const char *set_this_salt(const char *newsalt)
+{
+ char *orig_salt = ths_salt;
+ ths_salt = SMB_STRDUP(newsalt);
+ SAFE_FREE(orig_salt);
+ return ths_salt;
+}
+
+static char *ths_crypted;
+static const char *get_this_crypted(void)
+{
+ if (!ths_crypted) {
+ return "";
+ }
+ return ths_crypted;
+}
+
+static const char *set_this_crypted(const char *newcrypted)
+{
+ char *orig_crypted = ths_crypted;
+ ths_crypted = SMB_STRDUP(newcrypted);
+ SAFE_FREE(orig_crypted);
+ return ths_crypted;
+}
+#endif
#ifdef WITH_AFS
/*******************************************************************
check on AFS authentication
********************************************************************/
-static BOOL afs_auth(char *user, char *password)
+static bool afs_auth(char *user, char *password)
{
long password_expires = 0;
char *reason;
/*******************************************************************
check on a DCE/DFS authentication
********************************************************************/
-static BOOL dfs_auth(char *user, char *password)
+static bool dfs_auth(char *user, char *password)
{
+ struct tm *t;
error_status_t err;
int err2;
int prterr;
* Assumes local passwd file is kept in sync w/ DCE RGY!
*/
- if (strcmp((char *)crypt(password, this_salt), this_crypted))
+ if (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()))
{
return (False);
}
}
/*
- * NB. I'd like to change these to call something like become_user()
+ * 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
set_effective_uid(0);
set_effective_gid(0);
- DEBUG(0,
- ("DCE context expires: %s", asctime(localtime(&expire_time))));
+ t = localtime(&expire_time);
+ if (t) {
+ const char *asct = asctime(t);
+ if (asct) {
+ DEBUG(0,("DCE context expires: %s", asct));
+ }
+ }
dcelogin_atmost_once = 1;
return (True);
}
#endif
-#ifdef KRB5_AUTH
-
-#include <krb5.h>
-
-/*******************************************************************
-check on Kerberos authentication
-********************************************************************/
-static BOOL krb5_auth(char *user, char *password)
-{
- krb5_data tgtname = {
- 0,
- KRB5_TGS_NAME_SIZE,
- KRB5_TGS_NAME
- };
- krb5_context kcontext;
- krb5_principal kprinc;
- krb5_principal server;
- krb5_creds kcreds;
- int options = 0;
- krb5_address **addrs = (krb5_address **) 0;
- krb5_preauthtype *preauth = NULL;
- krb5_keytab keytab = NULL;
- krb5_timestamp now;
- krb5_ccache ccache = NULL;
- int retval;
- char *name;
-
- if (retval = krb5_init_context(&kcontext))
- {
- return (False);
- }
-
- if (retval = krb5_timeofday(kcontext, &now))
- {
- return (False);
- }
-
- if (retval = krb5_cc_default(kcontext, &ccache))
- {
- return (False);
- }
-
- if (retval = krb5_parse_name(kcontext, user, &kprinc))
- {
- return (False);
- }
-
- ZERO_STRUCT(kcreds);
-
- kcreds.client = kprinc;
-
- if ((retval = krb5_build_principal_ext(kcontext, &server,
- krb5_princ_realm(kcontext,
- kprinc)->
- length,
- krb5_princ_realm(kcontext,
- kprinc)->data,
- tgtname.length, tgtname.data,
- krb5_princ_realm(kcontext,
- kprinc)->
- length,
- krb5_princ_realm(kcontext,
- kprinc)->data,
- 0)))
- {
- return (False);
- }
-
- kcreds.server = server;
-
- retval = krb5_get_in_tkt_with_password(kcontext,
- options,
- addrs,
- NULL,
- preauth,
- password, 0, &kcreds, 0);
-
- if (retval)
- {
- return (False);
- }
-
- return (True);
-}
-#endif /* KRB5_AUTH */
-
-#ifdef KRB4_AUTH
-#include <krb.h>
-
-/*******************************************************************
-check on Kerberos authentication
-********************************************************************/
-static BOOL krb4_auth(char *user, char *password)
-{
- char realm[REALM_SZ];
- char tkfile[MAXPATHLEN];
-
- if (krb_get_lrealm(realm, 1) != KSUCCESS)
- {
- (void)safe_strcpy(realm, KRB_REALM, sizeof(realm) - 1);
- }
-
- (void)slprintf(tkfile, sizeof(tkfile) - 1, "/tmp/samba_tkt_%d",
- (int)sys_getpid());
-
- krb_set_tkt_string(tkfile);
- if (krb_verify_user(user, "", realm, password, 0, "rmcd") == KSUCCESS)
- {
- unlink(tkfile);
- return 1;
- }
- unlink(tkfile);
- return 0;
-}
-#endif /* KRB4_AUTH */
-
#ifdef LINUX_BIGCRYPT
/****************************************************************************
an enhanced crypt for Linux to handle password longer than 8 characters
offset is the first char to try and change (start with 0)
it assumes the string starts lowercased
****************************************************************************/
-static BOOL string_combinations2(char *s, int offset, BOOL (*fn) (char *),
- int N)
+static NTSTATUS string_combinations2(char *s, int offset,
+ NTSTATUS (*fn)(const char *s,
+ void *private_data),
+ int N, void *private_data)
{
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));
+ return (fn(s, private_data));
for (i = offset; i < (len - (N - 1)); i++) {
char c = s[i];
- if (!islower(c))
+ if (!islower_ascii(c))
continue;
- s[i] = toupper(c);
- if (string_combinations2(s, i + 1, fn, N - 1))
- return (True);
+ s[i] = toupper_ascii(c);
+ nt_status = string_combinations2(s, i + 1, fn, N - 1,
+ private_data);
+ if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD)) {
+ return nt_status;
+ }
s[i] = c;
}
- return (False);
+ return (NT_STATUS_WRONG_PASSWORD);
}
/****************************************************************************
offset is the first char to try and change (start with 0)
it assumes the string starts lowercased
****************************************************************************/
-static BOOL string_combinations(char *s, BOOL (*fn) (char *), int N)
+static NTSTATUS string_combinations(char *s,
+ NTSTATUS (*fn)(const char *s,
+ void *private_data),
+ int N, void *private_data)
{
int n;
- for (n = 1; n <= N; n++)
- if (string_combinations2(s, 0, fn, n))
- return (True);
- return (False);
+ NTSTATUS nt_status;
+ for (n = 1; n <= N; n++) {
+ nt_status = string_combinations2(s, 0, fn, n, private_data);
+ if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD)) {
+ return nt_status;
+ }
+ }
+ return NT_STATUS_WRONG_PASSWORD;
}
/****************************************************************************
core of password checking routine
****************************************************************************/
-static BOOL password_check(char *password)
+static NTSTATUS password_check(const char *password, void *private_data)
{
-
#ifdef WITH_PAM
- return (smb_pam_passcheck(this_user, password) == NT_STATUS_OK);
-#endif /* WITH_PAM */
+ const char *rhost = (const char *)private_data;
+ return smb_pam_passcheck(get_this_user(), rhost, password);
+#else
+
+ bool ret;
#ifdef WITH_AFS
- if (afs_auth(this_user, password))
- return (True);
+ if (afs_auth(get_this_user(), password))
+ return NT_STATUS_OK;
#endif /* WITH_AFS */
#ifdef WITH_DFS
- if (dfs_auth(this_user, password))
- return (True);
+ if (dfs_auth(get_this_user(), password))
+ return NT_STATUS_OK;
#endif /* WITH_DFS */
-#ifdef KRB5_AUTH
- if (krb5_auth(this_user, password))
- return (True);
-#endif /* KRB5_AUTH */
-
-#ifdef KRB4_AUTH
- if (krb4_auth(this_user, password))
- return (True);
-#endif /* KRB4_AUTH */
-
#ifdef OSF1_ENH_SEC
- {
- BOOL 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);
- }
- return ret;
+
+ ret = (strcmp(osf1_bigcrypt(password, get_this_salt()),
+ get_this_crypted()) == 0);
+ if (!ret) {
+ DEBUG(2,
+ ("OSF1_ENH_SEC failed. Trying normal crypt.\n"));
+ ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
+ }
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
}
+
#endif /* OSF1_ENH_SEC */
#ifdef ULTRIX_AUTH
- return (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
- return (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)
* by crypt.
*/
- if (strcmp(bigcrypt(password, this_salt), this_crypted) == 0)
- return True;
+ if (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0)
+ return NT_STATUS_OK;
else
- return (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
- return (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 (False);
+ return NT_STATUS_LOGON_FAILURE;
#else /* HAVE_CRYPT */
- return (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;
+ }
#endif /* HAVE_CRYPT */
#endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
+#endif /* WITH_PAM */
}
/****************************************************************************
-check if a username/password is OK
+CHECK if a username/password is OK
the function pointer fn() points to a function to call when a successful
match is found and is used to update the encrypted password file
-return True on correct match, False otherwise
+return NT_STATUS_OK on correct match, appropriate error otherwise
****************************************************************************/
-BOOL pass_check(char *user, char *password, int pwlen,
- BOOL (*fn) (char *, char *))
+NTSTATUS pass_check(const struct passwd *pass,
+ const char *user,
+ const char *rhost,
+ const char *password,
+ bool run_cracker)
{
- pstring pass2;
+ char *pass2 = NULL;
int level = lp_passwordlevel();
- struct passwd *pass = NULL;
- if (password)
- password[pwlen] = 0;
+ NTSTATUS nt_status;
-#if DEBUG_PASSWORD
+#ifdef DEBUG_PASSWORD
DEBUG(100, ("checking user=[%s] pass=[%s]\n", user, password));
#endif
if (!password)
- return (False);
+ return NT_STATUS_LOGON_FAILURE;
- if (((!*password) || (!pwlen)) && !lp_null_passwords())
- return (False);
+ if ((!*password) && !lp_null_passwords())
+ return NT_STATUS_LOGON_FAILURE;
- pass = Get_Pwnam(user, True);
-
-#ifdef WITH_PAM
+#if defined(WITH_PAM)
/*
* If we're using PAM we want to short-circuit all the
* checks below and dive straight into the PAM code.
*/
- fstrcpy(this_user, user);
+ if (set_this_user(user) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
- 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 (!pass) {
DEBUG(3, ("Couldn't find user %s\n", user));
- return (False);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+
+ /* 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
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)
{
#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);
+ if (pr_pw && pr_pw->ufld.fd_encrypt) {
+ if (set_this_crypted(pr_pw->ufld.fd_encrypt) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+ }
+#endif
+
+#ifdef HAVE_GETPWANAM
+ {
+ struct passwd_adjunct *pwret;
+ pwret = getpwanam(s);
+ if (pwret && pwret->pwa_passwd) {
+ if (set_this_crypted(pwret->pwa_passwd) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
}
#endif
user));
mypasswd = getprpwnam(user);
if (mypasswd) {
- fstrcpy(pass->pw_name, mypasswd->ufld.fd_name);
- fstrcpy(pass->pw_passwd, mypasswd->ufld.fd_encrypt);
+ if (set_this_user(mypasswd->ufld.fd_name) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ if (set_this_crypted(mypasswd->ufld.fd_encrypt) == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
} else {
DEBUG(5,
("OSF1_ENH_SEC: No entry for user %s in protected database !\n",
{
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_user, pass->pw_name);
- 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
- 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));
- return (False);
+ get_this_user()));
+ return NT_STATUS_LOGON_FAILURE;
}
if (!*password) {
DEBUG(3,
("Allowing access to %s with null password\n",
- this_user));
- return (True);
+ get_this_user()));
+ return NT_STATUS_OK;
}
}
-#endif /* WITH_PAM */
+#endif /* defined(WITH_PAM) */
/* try it as it came to us */
- if (password_check(password)) {
- if (fn)
- fn(user, password);
- return (True);
+ nt_status = password_check(password, (void *)rhost);
+ if NT_STATUS_IS_OK(nt_status) {
+ 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). */
+ return (nt_status);
+ }
+
+ if (!run_cracker) {
+ return (nt_status);
}
/* if the password was given to us with mixed case then we don't
- need to proceed as we know it hasn't been case modified by the
- client */
+ * need to proceed as we know it hasn't been case modified by the
+ * client */
if (strhasupper(password) && strhaslower(password)) {
- return (False);
+ 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 (password_check(password)) {
- if (fn)
- fn(user, password);
- return (True);
+ if (strhasupper(pass2)) {
+ strlower_m(pass2);
+ nt_status = password_check(pass2, (void *)rhost);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ return (nt_status);
}
}
/* give up? */
if (level < 1) {
- /* restore it */
- fstrcpy(password, pass2);
- return (False);
+ return NT_STATUS_WRONG_PASSWORD;
}
/* last chance - all combinations of up to level chars upper! */
- strlower(password);
+ strlower_m(pass2);
- if (string_combinations(password, password_check, level)) {
- if (fn)
- fn(user, password);
- return (True);
+ nt_status = string_combinations(pass2, password_check, level,
+ (void *)rhost);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
}
- /* restore it */
- fstrcpy(password, pass2);
-
- return (False);
+ return NT_STATUS_WRONG_PASSWORD;
}
git.samba.org / samba.git / blobdiff