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authorAndrew Bartlett <abartlet@samba.org>2004-07-12 09:07:10 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:57:32 -0500
commitb62e6f1ec13c6cad5a94a2a27dc14d3fdfdd4cfc (patch)
treef7cfeecdfeccf04a10a0c0a27f823d1ceb6a785f /source4/libcli/auth
parente053c719ab0f270dbad46dfb9e6eeae22e3b833d (diff)
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r1461: ntlm_check.c is a server-side peice of code, so it belongs in AUTH.
Andrew Bartlett (This used to be commit 67ac9600664e93aa2fe9426127313b57ddaec2cf)
Diffstat (limited to 'source4/libcli/auth')
-rw-r--r--source4/libcli/auth/ntlm_check.c447
1 files changed, 0 insertions, 447 deletions
diff --git a/source4/libcli/auth/ntlm_check.c b/source4/libcli/auth/ntlm_check.c
deleted file mode 100644
index f101b230d4..0000000000
--- a/source4/libcli/auth/ntlm_check.c
+++ /dev/null
@@ -1,447 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- Password and authentication handling
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
- Copyright (C) Gerald Carter 2003
- Copyright (C) Luke Kenneth Casson Leighton 1996-2000
-
- 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
- (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.
-*/
-
-#include "includes.h"
-
-#undef DBGC_CLASS
-#define DBGC_CLASS DBGC_AUTH
-
-/****************************************************************************
- Core of smb password checking routine.
-****************************************************************************/
-
-static BOOL smb_pwd_check_ntlmv1(const DATA_BLOB *nt_response,
- const uint8_t *part_passwd,
- const DATA_BLOB *sec_blob,
- DATA_BLOB *user_sess_key)
-{
- /* Finish the encryption of part_passwd. */
- uint8_t p24[24];
-
- if (part_passwd == NULL) {
- DEBUG(10,("No password set - DISALLOWING access\n"));
- /* No password set - always false ! */
- return False;
- }
-
- if (sec_blob->length != 8) {
- DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect challenge size (%lu)\n",
- (unsigned long)sec_blob->length));
- return False;
- }
-
- if (nt_response->length != 24) {
- DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect password length (%lu)\n",
- (unsigned long)nt_response->length));
- return False;
- }
-
- SMBOWFencrypt(part_passwd, sec_blob->data, p24);
- if (user_sess_key != NULL) {
- *user_sess_key = data_blob(NULL, 16);
- SMBsesskeygen_ntv1(part_passwd, user_sess_key->data);
- }
-
-
-#if DEBUG_PASSWORD
- DEBUG(100,("Part password (P16) was |\n"));
- dump_data(100, part_passwd, 16);
- DEBUGADD(100,("Password from client was |\n"));
- dump_data(100, nt_response->data, nt_response->length);
- DEBUGADD(100,("Given challenge was |\n"));
- dump_data(100, sec_blob->data, sec_blob->length);
- DEBUGADD(100,("Value from encryption was |\n"));
- dump_data(100, p24, 24);
-#endif
- return (memcmp(p24, nt_response->data, 24) == 0);
-}
-
-/****************************************************************************
- Core of smb password checking routine. (NTLMv2, LMv2)
- Note: The same code works with both NTLMv2 and LMv2.
-****************************************************************************/
-
-static BOOL smb_pwd_check_ntlmv2(const DATA_BLOB *ntv2_response,
- const uint8_t *part_passwd,
- const DATA_BLOB *sec_blob,
- const char *user, const char *domain,
- BOOL upper_case_domain, /* should the domain be transformed into upper case? */
- DATA_BLOB *user_sess_key)
-{
- /* Finish the encryption of part_passwd. */
- uint8_t kr[16];
- uint8_t value_from_encryption[16];
- uint8_t client_response[16];
- DATA_BLOB client_key_data;
-
- if (part_passwd == NULL) {
- DEBUG(10,("No password set - DISALLOWING access\n"));
- /* No password set - always False */
- return False;
- }
-
- if (sec_blob->length != 8) {
- DEBUG(0, ("smb_pwd_check_ntlmv2: incorrect challenge size (%lu)\n",
- (unsigned long)sec_blob->length));
- return False;
- }
-
- if (ntv2_response->length < 24) {
- /* We MUST have more than 16 bytes, or the stuff below will go
- crazy. No known implementation sends less than the 24 bytes
- for LMv2, let alone NTLMv2. */
- DEBUG(0, ("smb_pwd_check_ntlmv2: incorrect password length (%lu)\n",
- (unsigned long)ntv2_response->length));
- return False;
- }
-
- client_key_data = data_blob(ntv2_response->data+16, ntv2_response->length-16);
- /*
- todo: should we be checking this for anything? We can't for LMv2,
- but for NTLMv2 it is meant to contain the current time etc.
- */
-
- memcpy(client_response, ntv2_response->data, sizeof(client_response));
-
- if (!ntv2_owf_gen(part_passwd, user, domain, upper_case_domain, kr)) {
- return False;
- }
-
- SMBOWFencrypt_ntv2(kr, sec_blob, &client_key_data, value_from_encryption);
- if (user_sess_key != NULL) {
- *user_sess_key = data_blob(NULL, 16);
- SMBsesskeygen_ntv2(kr, value_from_encryption, user_sess_key->data);
- }
-
-#if DEBUG_PASSWORD
- DEBUG(100,("Part password (P16) was |\n"));
- dump_data(100, part_passwd, 16);
- DEBUGADD(100,("Password from client was |\n"));
- dump_data(100, ntv2_response->data, ntv2_response->length);
- DEBUGADD(100,("Variable data from client was |\n"));
- dump_data(100, client_key_data.data, client_key_data.length);
- DEBUGADD(100,("Given challenge was |\n"));
- dump_data(100, sec_blob->data, sec_blob->length);
- DEBUGADD(100,("Value from encryption was |\n"));
- dump_data(100, value_from_encryption, 16);
-#endif
- data_blob_clear_free(&client_key_data);
- return (memcmp(value_from_encryption, client_response, 16) == 0);
-}
-
-/**
- * Check a challenge-response password against the value of the NT or
- * LM password hash.
- *
- * @param mem_ctx talloc context
- * @param challenge 8-byte challenge. If all zero, forces plaintext comparison
- * @param nt_response 'unicode' NT response to the challenge, or unicode password
- * @param lm_response ASCII or LANMAN response to the challenge, or password in DOS code page
- * @param username internal Samba username, for log messages
- * @param client_username username the client used
- * @param client_domain domain name the client used (may be mapped)
- * @param nt_pw MD4 unicode password from our passdb or similar
- * @param lm_pw LANMAN ASCII password from our passdb or similar
- * @param user_sess_key User session key
- * @param lm_sess_key LM session key (first 8 bytes of the LM hash)
- */
-
-NTSTATUS ntlm_password_check(TALLOC_CTX *mem_ctx,
- const DATA_BLOB *challenge,
- const DATA_BLOB *lm_response,
- const DATA_BLOB *nt_response,
- const DATA_BLOB *lm_interactive_password,
- const DATA_BLOB *nt_interactive_password,
- const char *username,
- const char *client_username,
- const char *client_domain,
- const uint8_t *lm_pw, const uint8_t *nt_pw,
- DATA_BLOB *user_sess_key,
- DATA_BLOB *lm_sess_key)
-{
- static const uint8_t zeros[8];
- if (nt_pw == NULL) {
- DEBUG(3,("ntlm_password_check: NO NT password stored for user %s.\n",
- username));
- }
-
- if (nt_interactive_password && nt_interactive_password->length && nt_pw) {
- if (nt_interactive_password->length != 16) {
- DEBUG(3,("ntlm_password_check: Interactive logon: Invalid NT password length (%d) supplied for user %s\n", (int)nt_interactive_password->length,
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- if (memcmp(nt_interactive_password->data, nt_pw, 16) == 0) {
- if (user_sess_key) {
- *user_sess_key = data_blob(NULL, 16);
- SMBsesskeygen_ntv1(nt_pw, user_sess_key->data);
- }
- return NT_STATUS_OK;
- } else {
- DEBUG(3,("ntlm_password_check: Interactive logon: NT password check failed for user %s\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- } else if (lm_interactive_password && lm_interactive_password->length && lm_pw) {
- if (lm_interactive_password->length != 16) {
- DEBUG(3,("ntlm_password_check: Interactive logon: Invalid LANMAN password length (%d) supplied for user %s\n", (int)lm_interactive_password->length,
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- if (!lp_lanman_auth()) {
- DEBUG(3,("ntlm_password_check: Interactive logon: only LANMAN password supplied for user %s, and LM passwords are disabled!\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- if (memcmp(lm_interactive_password->data, lm_pw, 16) == 0) {
- return NT_STATUS_OK;
- } else {
- DEBUG(3,("ntlm_password_check: Interactive logon: LANMAN password check failed for user %s\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
- }
-
- /* Check for cleartext netlogon. Used by Exchange 5.5. */
- if (challenge->length == sizeof(zeros) &&
- (memcmp(challenge->data, zeros, challenge->length) == 0 )) {
-
- DEBUG(4,("ntlm_password_check: checking plaintext passwords for user %s\n",
- username));
- if (nt_pw && nt_response->length) {
- uint8_t pwhash[16];
- mdfour(pwhash, nt_response->data, nt_response->length);
- if (memcmp(pwhash, nt_pw, sizeof(pwhash)) == 0) {
- return NT_STATUS_OK;
- } else {
- DEBUG(3,("ntlm_password_check: NT (Unicode) plaintext password check failed for user %s\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- } else if (!lp_lanman_auth()) {
- DEBUG(3,("ntlm_password_check: (plaintext password check) LANMAN passwords NOT PERMITTED for user %s\n",
- username));
-
- } else if (lm_pw && lm_response->length) {
- uint8_t dospwd[14];
- uint8_t p16[16];
- ZERO_STRUCT(dospwd);
-
- memcpy(dospwd, lm_response->data, MIN(lm_response->length, sizeof(dospwd)));
- /* Only the fisrt 14 chars are considered, password need not be null terminated. */
-
- /* we *might* need to upper-case the string here */
- E_P16((const uint8_t *)dospwd, p16);
-
- if (memcmp(p16, lm_pw, sizeof(p16)) == 0) {
- return NT_STATUS_OK;
- } else {
- DEBUG(3,("ntlm_password_check: LANMAN (ASCII) plaintext password check failed for user %s\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
- } else {
- DEBUG(3, ("Plaintext authentication for user %s attempted, but neither NT nor LM passwords available\n", username));
- return NT_STATUS_WRONG_PASSWORD;
- }
- }
-
- if (nt_response->length != 0 && nt_response->length < 24) {
- DEBUG(2,("ntlm_password_check: invalid NT password length (%lu) for user %s\n",
- (unsigned long)nt_response->length, username));
- }
-
- if (nt_response->length >= 24 && nt_pw) {
- if (nt_response->length > 24) {
- /* We have the NT MD4 hash challenge available - see if we can
- use it
- */
- DEBUG(4,("ntlm_password_check: Checking NTLMv2 password with domain [%s]\n", client_domain));
- if (smb_pwd_check_ntlmv2( nt_response,
- nt_pw, challenge,
- client_username,
- client_domain,
- False,
- user_sess_key)) {
- return NT_STATUS_OK;
- }
-
- DEBUG(4,("ntlm_password_check: Checking NTLMv2 password with uppercased version of domain [%s]\n", client_domain));
- if (smb_pwd_check_ntlmv2( nt_response,
- nt_pw, challenge,
- client_username,
- client_domain,
- True,
- user_sess_key)) {
- return NT_STATUS_OK;
- }
-
- DEBUG(4,("ntlm_password_check: Checking NTLMv2 password without a domain\n"));
- if (smb_pwd_check_ntlmv2( nt_response,
- nt_pw, challenge,
- client_username,
- "",
- False,
- user_sess_key)) {
- return NT_STATUS_OK;
- } else {
- DEBUG(3,("ntlm_password_check: NTLMv2 password check failed\n"));
- return NT_STATUS_WRONG_PASSWORD;
- }
- }
-
- if (lp_ntlm_auth()) {
- /* We have the NT MD4 hash challenge available - see if we can
- use it (ie. does it exist in the smbpasswd file).
- */
- DEBUG(4,("ntlm_password_check: Checking NT MD4 password\n"));
- if (smb_pwd_check_ntlmv1(nt_response,
- nt_pw, challenge,
- user_sess_key)) {
- /* The LM session key for this response is not very secure,
- so use it only if we otherwise allow LM authentication */
-
- if (lp_lanman_auth() && lm_pw) {
- *lm_sess_key = data_blob(lm_pw, 8);
- }
- return NT_STATUS_OK;
- } else {
- DEBUG(3,("ntlm_password_check: NT MD4 password check failed for user %s\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
- } else {
- DEBUG(2,("ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user %s\n",
- username));
- /* no return, becouse we might pick up LMv2 in the LM field */
- }
- }
-
- if (lm_response->length == 0) {
- DEBUG(3,("ntlm_password_check: NEITHER LanMan nor NT password supplied for user %s\n",
- username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- if (lm_response->length < 24) {
- DEBUG(2,("ntlm_password_check: invalid LanMan password length (%lu) for user %s\n",
- (unsigned long)nt_response->length, username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- if (!lp_lanman_auth()) {
- DEBUG(3,("ntlm_password_check: Lanman passwords NOT PERMITTED for user %s\n",
- username));
- } else if (!lm_pw) {
- DEBUG(3,("ntlm_password_check: NO LanMan password set for user %s (and no NT password supplied)\n",
- username));
- } else {
- DEBUG(4,("ntlm_password_check: Checking LM password\n"));
- if (smb_pwd_check_ntlmv1(lm_response,
- lm_pw, challenge,
- NULL)) {
- /* The session key for this response is still very odd.
- It not very secure, so use it only if we otherwise
- allow LM authentication */
-
- if (lp_lanman_auth() && lm_pw) {
- uint8_t first_8_lm_hash[16];
- memcpy(first_8_lm_hash, lm_pw, 8);
- memset(first_8_lm_hash + 8, '\0', 8);
- *user_sess_key = data_blob(first_8_lm_hash, 16);
- *lm_sess_key = data_blob(lm_pw, 8);
- }
- return NT_STATUS_OK;
- }
- }
-
- if (!nt_pw) {
- DEBUG(4,("ntlm_password_check: LM password check failed for user, no NT password %s\n",username));
- return NT_STATUS_WRONG_PASSWORD;
- }
-
- /* This is for 'LMv2' authentication. almost NTLMv2 but limited to 24 bytes.
- - related to Win9X, legacy NAS pass-though authentication
- */
- DEBUG(4,("ntlm_password_check: Checking LMv2 password with domain %s\n", client_domain));
- if (smb_pwd_check_ntlmv2( lm_response,
- nt_pw, challenge,
- client_username,
- client_domain,
- False,
- NULL)) {
- return NT_STATUS_OK;
- }
-
- DEBUG(4,("ntlm_password_check: Checking LMv2 password with upper-cased version of domain %s\n", client_domain));
- if (smb_pwd_check_ntlmv2( lm_response,
- nt_pw, challenge,
- client_username,
- client_domain,
- True,
- NULL)) {
- return NT_STATUS_OK;
- }
-
- DEBUG(4,("ntlm_password_check: Checking LMv2 password without a domain\n"));
- if (smb_pwd_check_ntlmv2( lm_response,
- nt_pw, challenge,
- client_username,
- "",
- False,
- NULL)) {
- return NT_STATUS_OK;
- }
-
- /* Apparently NT accepts NT responses in the LM field
- - I think this is related to Win9X pass-though authentication
- */
- DEBUG(4,("ntlm_password_check: Checking NT MD4 password in LM field\n"));
- if (lp_ntlm_auth()) {
- if (smb_pwd_check_ntlmv1(lm_response,
- nt_pw, challenge,
- NULL)) {
- /* The session key for this response is still very odd.
- It not very secure, so use it only if we otherwise
- allow LM authentication */
-
- if (lp_lanman_auth() && lm_pw) {
- uint8_t first_8_lm_hash[16];
- memcpy(first_8_lm_hash, lm_pw, 8);
- memset(first_8_lm_hash + 8, '\0', 8);
- *user_sess_key = data_blob(first_8_lm_hash, 16);
- *lm_sess_key = data_blob(lm_pw, 8);
- }
- return NT_STATUS_OK;
- }
- DEBUG(3,("ntlm_password_check: LM password, NT MD4 password in LM field and LMv2 failed for user %s\n",username));
- } else {
- DEBUG(3,("ntlm_password_check: LM password and LMv2 failed for user %s, and NT MD4 password in LM field not permitted\n",username));
- }
- return NT_STATUS_WRONG_PASSWORD;
-}
-