-/*
- 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
password database. The SMB encrypted password support is elsewhere */
#include "includes.h"
+#include "system/passwd.h"
+#include "auth.h"
-extern int DEBUGLEVEL;
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
-/* 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]="";
-
-
-/****************************************************************************
-update the enhanced security database. Only relevant for OSF1 at the moment.
-****************************************************************************/
-static void update_protected_database(char *user, BOOL result)
+#if !defined(WITH_PAM)
+static char *ths_salt;
+/* This must be writable. */
+static char *get_this_salt(void)
{
-#ifdef OSF1_ENH_SEC
- struct pr_passwd *mypasswd;
- time_t starttime;
-
- mypasswd = getprpwnam (user);
- starttime = time (NULL);
-
- if (result) {
- mypasswd->ufld.fd_slogin = starttime;
- mypasswd->ufld.fd_nlogins = 0;
-
- putprpwnam(user,mypasswd);
- } else {
- mypasswd->ufld.fd_ulogin = starttime;
- mypasswd->ufld.fd_nlogins = mypasswd->ufld.fd_nlogins + 1;
- if (mypasswd->ufld.fd_max_tries != 0 &&
- mypasswd->ufld.fd_nlogins > mypasswd->ufld.fd_max_tries) {
- mypasswd->uflg.fg_lock = 0;
- DEBUG(3,("Account %s is disabled\n", user));
- }
- putprpwnam(user ,mypasswd);
- }
-#endif
+ return ths_salt;
}
+/* We may be setting a modified version of the same
+ * string, so don't free before use. */
-#ifdef HAVE_PAM
-/*******************************************************************
-check on PAM authentication
-********************************************************************/
-
-/* We first need some helper functions */
-#include <security/pam_appl.h>
-/* Static variables used to communicate between the conversation function
- * and the server_login function
- */
-static char *PAM_username;
-static char *PAM_password;
-
-/* PAM conversation function
- * Here we assume (for now, at least) that echo on means login name, and
- * echo off means password.
- */
-static int PAM_conv (int num_msg,
- const struct pam_message **msg,
- struct pam_response **resp,
- void *appdata_ptr) {
- int replies = 0;
- struct pam_response *reply = NULL;
-
- #define COPY_STRING(s) (s) ? strdup(s) : NULL
-
- reply = malloc(sizeof(struct pam_response) * num_msg);
- if (!reply) return PAM_CONV_ERR;
-
- for (replies = 0; replies < num_msg; replies++) {
- switch (msg[replies]->msg_style) {
- case PAM_PROMPT_ECHO_ON:
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = COPY_STRING(PAM_username);
- /* PAM frees resp */
- break;
- case PAM_PROMPT_ECHO_OFF:
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = COPY_STRING(PAM_password);
- /* PAM frees resp */
- break;
- case PAM_TEXT_INFO:
- /* fall through */
- case PAM_ERROR_MSG:
- /* ignore it... */
- reply[replies].resp_retcode = PAM_SUCCESS;
- reply[replies].resp = NULL;
- break;
- default:
- /* Must be an error of some sort... */
- free (reply);
- return PAM_CONV_ERR;
- }
- }
- if (reply) *resp = reply;
- return PAM_SUCCESS;
+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 struct pam_conv PAM_conversation = {
- &PAM_conv,
- NULL
-};
-
-static BOOL pam_auth(char *user,char *password)
+static char *ths_crypted;
+static const char *get_this_crypted(void)
{
- pam_handle_t *pamh;
- int pam_error;
-
- /* Now use PAM to do authentication. For now, we won't worry about
- * session logging, only authentication. Bail out if there are any
- * errors. Since this is a limited protocol, and an even more limited
- * function within a server speaking this protocol, we can't be as
- * verbose as would otherwise make sense.
- * Query: should we be using PAM_SILENT to shut PAM up?
- */
- #define PAM_BAIL if (pam_error != PAM_SUCCESS) { \
- pam_end(pamh, 0); return False; \
- }
- PAM_password = password;
- PAM_username = user;
- pam_error = pam_start("samba", user, &PAM_conversation, &pamh);
- PAM_BAIL;
-/* Setting PAM_SILENT stops generation of error messages to syslog
- * to enable debugging on Red Hat Linux set:
- * /etc/pam.d/samba:
- * auth required /lib/security/pam_pwdb.so nullok shadow audit
- * _OR_ change PAM_SILENT to 0 to force detailed reporting (logging)
- */
- pam_error = pam_authenticate(pamh, PAM_SILENT);
- PAM_BAIL;
- /* It is not clear to me that account management is the right thing
- * to do, but it is not clear that it isn't, either. This can be
- * removed if no account management should be done. Alternately,
- * put a pam_allow.so entry in /etc/pam.conf for account handling. */
- pam_error = pam_acct_mgmt(pamh, PAM_SILENT);
- PAM_BAIL;
- pam_end(pamh, PAM_SUCCESS);
- /* If this point is reached, the user has been authenticated. */
- return(True);
+ if (!ths_crypted) {
+ return "";
+ }
+ return ths_crypted;
}
-#endif
-
-#ifdef WITH_AFS
-/*******************************************************************
-check on AFS authentication
-********************************************************************/
-static BOOL afs_auth(char *user,char *password)
+static const char *set_this_crypted(const char *newcrypted)
{
- 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);
- }
- return(False);
+ char *orig_crypted = ths_crypted;
+ ths_crypted = SMB_STRDUP(newcrypted);
+ SAFE_FREE(orig_crypted);
+ return ths_crypted;
}
#endif
-#ifdef WITH_DFS
-/*****************************************************************
- 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 :
- - 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)
+/****************************************************************************
+core of password checking routine
+****************************************************************************/
+static NTSTATUS password_check(const char *user, const char *password, const void *private_data)
{
- 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];
-
- 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!
- */
+#ifdef WITH_PAM
+ const char *rhost = (const char *)private_data;
+ return smb_pam_passcheck(user, rhost, password);
+#else
- if (strcmp((char *)crypt(password,this_salt),this_crypted)) {
- return(False);
- }
-#endif
+ bool ret;
- 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(¤t_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));
- }
+#ifdef ULTRIX_AUTH
+ ret = (strcmp((char *)crypt16(password, get_this_salt()), get_this_crypted()) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
}
- 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);
- }
+#endif /* ULTRIX_AUTH */
- 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);
- }
+#if defined(HAVE_BIGCRYPT) && defined(HAVE_CRYPT) && defined(USE_BOTH_CRYPT_CALLS)
/*
- * NB. I'd like to change these to call something like become_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.
+ * Some systems have bigcrypt in the C library but might not
+ * actually use it for the password hashes (HPUX 10.20) is
+ * a noteable example. So we try bigcrypt first, followed
+ * by crypt.
*/
-
- if (setregid(-1, pw->pw_gid) != 0) {
- DEBUG(0,("Can't set egid to %d (%s)\n",
- pw->pw_gid, strerror(errno)));
- return False;
- }
- if (setreuid(-1, pw->pw_uid) != 0) {
- setgid(0);
- DEBUG(0,("Can't set euid to %d (%s)\n",
- pw->pw_uid, strerror(errno)));
- return False;
- }
-
- 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);
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- 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);
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- DEBUG(0,("DCE can't get pwent. %s\n", dce_errstr));
-
- return(False);
- }
-
- 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);
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- DEBUG(0,("DCE Identity Validation failed for principal %s: %s\n",
- user,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);
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- DEBUG(0,("DCE certify identity failed: %s\n", dce_errstr));
-
- return(False);
- }
-
- 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);
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- 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));
-
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- return(False);
- }
-
- DEBUG(0,("DCE login succeeded for principal %s on pid %d\n",
- user, 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));
-
- sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
- if (err != error_status_ok) {
- dce_error_inq_text(err, dce_errstr, &err2);
- /* Go back to root, JRA. */
- setuid(0);
- setgid(0);
- DEBUG(0,("DCE can't get expiration. %s\n", dce_errstr));
-
- return(False);
- }
-
- setuid(0);
- setgid(0);
-
- DEBUG(0,("DCE context expires: %s",asctime(localtime(&expire_time))));
-
- dcelogin_atmost_once = 1;
- return (True);
-}
-
-void dfs_unlogin(void)
-{
- 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",
- getpid(), dce_errstr));
- }
-}
-#endif
-
-#ifdef KRB5_AUTH
-/*******************************************************************
-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);
- }
-
- memset((char *)&kcreds, 0, sizeof(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
-/*******************************************************************
-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",
- getpid());
-
- krb_set_tkt_string(tkfile);
- if (krb_verify_user(user, "", realm,
- password, 0,
- "rmcd") == KSUCCESS) {
- unlink(tkfile);
- return 1;
+ if (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0)
+ return NT_STATUS_OK;
+ else
+ ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
}
- unlink(tkfile);
- return 0;
-}
-#endif /* KRB4_AUTH */
+#else /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
-#ifdef LINUX_BIGCRYPT
-/****************************************************************************
-an enhanced crypt for Linux to handle password longer than 8 characters
-****************************************************************************/
-static int linux_bigcrypt(char *password,char *salt1, char *crypted)
-{
-#define LINUX_PASSWORD_SEG_CHARS 8
- char salt[3];
- int i;
-
- StrnCpy(salt,salt1,2);
- crypted +=2;
-
- for ( i=strlen(password); i > 0; i -= LINUX_PASSWORD_SEG_CHARS) {
- char * p = crypt(password,salt) + 2;
- if (strncmp(p, crypted, LINUX_PASSWORD_SEG_CHARS) != 0)
- return(0);
- password += LINUX_PASSWORD_SEG_CHARS;
- crypted += strlen(p);
+#ifdef HAVE_BIGCRYPT
+ ret = (strcmp(bigcrypt(password, get_this_salt()), get_this_crypted()) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
}
-
- return(1);
-}
-#endif
+#endif /* HAVE_BIGCRYPT */
-#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);
-
- 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;
+#ifndef HAVE_CRYPT
+ DEBUG(1, ("Warning - no crypt available\n"));
+ return NT_STATUS_LOGON_FAILURE;
+#else /* HAVE_CRYPT */
+ ret = (strcmp((char *)crypt(password, get_this_salt()), get_this_crypted()) == 0);
+ if (ret) {
+ return NT_STATUS_OK;
+ } else {
+ return NT_STATUS_WRONG_PASSWORD;
}
-
- return(result);
+#endif /* HAVE_CRYPT */
+#endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
+#endif /* WITH_PAM */
}
-#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 BOOL string_combinations2(char *s,int offset,BOOL (*fn)(char *),int N)
-{
- int len = strlen(s);
- int i;
-#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 (string_combinations2(s,i+1,fn,N-1))
- return(True);
- s[i] = c;
- }
- return(False);
-}
/****************************************************************************
-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
+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 NT_STATUS_OK on correct match, appropriate error otherwise
****************************************************************************/
-static BOOL string_combinations(char *s,BOOL (*fn)(char *),int N)
-{
- int n;
- for (n=1;n<=N;n++)
- if (string_combinations2(s,0,fn,n)) return(True);
- return(False);
-}
-
-/****************************************************************************
-core of password checking routine
-****************************************************************************/
-static BOOL password_check(char *password)
+NTSTATUS pass_check(const struct passwd *pass,
+ const char *user,
+ const char *rhost,
+ const char *password,
+ bool run_cracker)
{
+ char *pass2 = NULL;
-#ifdef HAVE_PAM
- /* This falls through if the password check fails
- - if HAVE_CRYPT is not defined this causes an error msg
- saying Warning - no crypt available
- - if HAVE_CRYPT is defined this is a potential security hole
- as it may authenticate via the crypt call when PAM
- settings say it should fail.
- if (pam_auth(user,password)) return(True);
- Hence we make a direct return to avoid a second chance!!!
- */
- return (pam_auth(this_user,password));
-#endif
-
-#ifdef WITH_AFS
- if (afs_auth(this_user,password)) return(True);
-#endif
-
-#ifdef WITH_DFS
- if (dfs_auth(this_user,password)) return(True);
-#endif
+ NTSTATUS nt_status;
-#ifdef KRB5_AUTH
- if (krb5_auth(this_user,password)) return(True);
+#ifdef DEBUG_PASSWORD
+ DEBUG(100, ("checking user=[%s] pass=[%s]\n", user, password));
#endif
-#ifdef KRB4_AUTH
- if (krb4_auth(this_user,password)) return(True);
-#endif
-
-#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;
- }
-#endif
+ if (!password)
+ return NT_STATUS_LOGON_FAILURE;
-#ifdef ULTRIX_AUTH
- return (strcmp((char *)crypt16(password, this_salt ),this_crypted) == 0);
-#endif
+ if ((!*password) && !lp_null_passwords())
+ return NT_STATUS_LOGON_FAILURE;
-#ifdef LINUX_BIGCRYPT
- return(linux_bigcrypt(password,this_salt,this_crypted));
-#endif
+#if defined(WITH_PAM)
-#ifdef HAVE_BIGCRYPT
- return(strcmp(bigcrypt(password,this_salt),this_crypted) == 0);
-#endif
+ /*
+ * If we're using PAM we want to short-circuit all the
+ * checks below and dive straight into the PAM code.
+ */
-#ifndef HAVE_CRYPT
- DEBUG(1,("Warning - no crypt available\n"));
- return(False);
-#else
- return(strcmp((char *)crypt(password,this_salt),this_crypted) == 0);
-#endif
-}
+ 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\n", user));
-/****************************************************************************
-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
-****************************************************************************/
-BOOL pass_check(char *user,char *password, int pwlen, struct passwd *pwd,
- BOOL (*fn)(char *, char *))
-{
- pstring pass2;
- int level = lp_passwordlevel();
- struct passwd *pass;
-
- if (password) password[pwlen] = 0;
-
-#if DEBUG_PASSWORD
- DEBUG(100,("checking user=[%s] pass=[%s]\n",user,password));
-#endif
-
- if (!password) {
- return(False);
+ if (!pass) {
+ DEBUG(3, ("Couldn't find user %s\n", user));
+ return NT_STATUS_NO_SUCH_USER;
}
- if (((!*password) || (!pwlen)) && !lp_null_passwords()) {
- return(False);
- }
- if (pwd && !user) {
- pass = (struct passwd *) pwd;
- user = pass->pw_name;
- } else {
- pass = Get_Pwnam(user,True);
+ /* 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;
}
-
-
- DEBUG(4,("Checking password for user %s (l=%d)\n",user,pwlen));
-
- if (!pass) {
- DEBUG(3,("Couldn't find user %s\n",user));
- return(False);
+ if (set_this_salt(pass->pw_passwd) == NULL) {
+ return NT_STATUS_NO_MEMORY;
}
#ifdef HAVE_GETSPNAM
spass = getspnam(pass->pw_name);
if (spass && spass->sp_pwdp) {
- pass->pw_passwd = 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)
UnixWare 2.x, tested on version
2.1. (tangent@cyberport.com) */
uinfo_t uinfo;
- if (ia_openinfo(pass->pw_name, &uinfo) != -1) {
+ if (ia_openinfo(pass->pw_name, &uinfo) != -1)
ia_get_logpwd(uinfo, &(pass->pw_passwd));
- }
}
#endif
-#ifdef HAVE_GETPRPWNAM
- {
- struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
- if (pr_pw && pr_pw->ufld.fd_encrypt)
- pass->pw_passwd = pr_pw->ufld.fd_encrypt;
- }
-#endif
-#ifdef OSF1_ENH_SEC
+#ifdef HAVE_GETPWANAM
{
- 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,("No entry for user %s in protected database !\n",
- user));
- return(False);
+ 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
+
#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_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;
-
- fstrcpy(this_crypted,pass->pw_passwd);
-
- if (!*this_crypted) {
+ {
+ 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
+
+ if (!get_this_crypted() || !*get_this_crypted()) {
if (!lp_null_passwords()) {
- DEBUG(2,("Disallowing %s with null password\n",
- this_user));
- return(False);
+ DEBUG(2, ("Disallowing %s with null password\n",
+ user));
+ return NT_STATUS_LOGON_FAILURE;
}
if (!*password) {
- DEBUG(3,("Allowing access to %s with null password\n",
- this_user));
- return(True);
+ DEBUG(3,
+ ("Allowing access to %s with null password\n",
+ user));
+ return NT_STATUS_OK;
}
}
+#endif /* defined(WITH_PAM) */
+
/* try it as it came to us */
- if (password_check(password)) {
- update_protected_database(user,True);
- if (fn) fn(user,password);
- return(True);
+ nt_status = password_check(user, password, (const 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);
-
- /* try all lowercase */
- strlower(password);
- if (password_check(password)) {
- update_protected_database(user,True);
- if (fn) fn(user,password);
- return(True);
- }
-
- /* give up? */
- if (level < 1) {
- update_protected_database(user,False);
-
- /* restore it */
- fstrcpy(password,pass2);
-
- return(False);
+ pass2 = talloc_strdup(talloc_tos(), password);
+ if (!pass2) {
+ return NT_STATUS_NO_MEMORY;
}
- /* last chance - all combinations of up to level chars upper! */
- strlower(password);
-
- if (string_combinations(password,password_check,level)) {
- update_protected_database(user,True);
- if (fn) fn(user,password);
- return(True);
+ /* try all lowercase if it's currently all uppercase */
+ 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);
+ }
}
- update_protected_database(user,False);
-
- /* restore it */
- fstrcpy(password,pass2);
-
- return(False);
+ return NT_STATUS_WRONG_PASSWORD;
}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff