/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Tridgell 1992-2000
Copyright (C) Luke Kenneth Casson Leighton 1996-2000
#include "includes.h"
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
/****************************************************************************
core of smb password checking routine.
****************************************************************************/
-static BOOL smb_pwd_check_ntlmv1(const uchar *password,
- const uchar *part_passwd,
- const uchar *c8,
- char user_sess_key[16])
+static BOOL smb_pwd_check_ntlmv1(DATA_BLOB nt_response,
+ const uchar *part_passwd,
+ DATA_BLOB sec_blob,
+ uint8 user_sess_key[16])
{
- /* Finish the encryption of part_passwd. */
- uchar p24[24];
-
- if (part_passwd == NULL) {
- DEBUG(10,("No password set - DISALLOWING access\n"));
- /* No password set - always false ! */
- return False;
- }
+ /* Finish the encryption of part_passwd. */
+ uchar 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 (%d)\n", sec_blob.length));
+ return False;
+ }
+
+ if (nt_response.length != 24) {
+ DEBUG(0, ("smb_pwd_check_ntlmv1: incorrect password length (%d)\n", nt_response.length));
+ return False;
+ }
- SMBOWFencrypt(part_passwd, c8, p24);
+ SMBOWFencrypt(part_passwd, sec_blob.data, p24);
if (user_sess_key != NULL)
{
SMBsesskeygen_ntv1(part_passwd, NULL, user_sess_key);
}
-
-
-
+
+
+
#if DEBUG_PASSWORD
DEBUG(100,("Part password (P16) was |"));
dump_data(100, part_passwd, 16);
DEBUG(100,("Password from client was |"));
- dump_data(100, password, 24);
+ dump_data(100, nt_response.data, nt_response.length);
DEBUG(100,("Given challenge was |"));
- dump_data(100, c8, 8);
+ dump_data(100, sec_blob.data, sec_blob.length);
DEBUG(100,("Value from encryption was |"));
dump_data(100, p24, 24);
#endif
- return (memcmp(p24, password, 24) == 0);
+ return (memcmp(p24, nt_response.data, 24) == 0);
}
+
/****************************************************************************
-core of smb password checking routine.
+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 uchar *password, size_t pwd_len,
- const uchar *part_passwd,
- const uchar *c8,
- const char *user, const char *domain,
- char user_sess_key[16])
+static BOOL smb_pwd_check_ntlmv2(const DATA_BLOB ntv2_response,
+ const uchar *part_passwd,
+ const DATA_BLOB sec_blob,
+ const char *user, const char *domain,
+ uint8 user_sess_key[16])
{
/* Finish the encryption of part_passwd. */
uchar kr[16];
- uchar resp[16];
+ uchar value_from_encryption[16];
+ uchar client_response[16];
+ DATA_BLOB client_key_data;
if (part_passwd == NULL)
{
return False;
}
- ntv2_owf_gen(part_passwd, user, domain, kr);
- SMBOWFencrypt_ntv2(kr, c8, 8, password+16, pwd_len-16, (char *)resp);
+ if (ntv2_response.length < 16) {
+ /* We MUST have more than 16 bytes, or the stuff below will go
+ crazy... */
+ DEBUG(0, ("smb_pwd_check_ntlmv2: incorrect password length (%d)\n",
+ 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, kr)) {
+ return False;
+ }
+
+ SMBOWFencrypt_ntv2(kr, sec_blob, client_key_data, value_from_encryption);
if (user_sess_key != NULL)
{
- SMBsesskeygen_ntv2(kr, resp, user_sess_key);
+ SMBsesskeygen_ntv2(kr, value_from_encryption, user_sess_key);
}
#if DEBUG_PASSWORD
DEBUG(100,("Part password (P16) was |"));
dump_data(100, part_passwd, 16);
DEBUG(100,("Password from client was |"));
- dump_data(100, password, pwd_len);
+ dump_data(100, ntv2_response.data, ntv2_response.length);
+ DEBUG(100,("Variable data from client was |"));
+ dump_data(100, client_key_data.data, client_key_data.length);
DEBUG(100,("Given challenge was |"));
- dump_data(100, c8, 8);
+ dump_data(100, sec_blob.data, sec_blob.length);
DEBUG(100,("Value from encryption was |"));
- dump_data(100, resp, 16);
+ dump_data(100, value_from_encryption, 16);
#endif
-
- return (memcmp(resp, password, 16) == 0);
+ data_blob_clear_free(&client_key_data);
+ return (memcmp(value_from_encryption, client_response, 16) == 0);
}
Do a specific test for an smb password being correct, given a smb_password and
the lanman and NT responses.
****************************************************************************/
-NTSTATUS sam_password_ok(SAM_ACCOUNT *sampass, const auth_usersupplied_info *user_info, char user_sess_key[16])
+static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
+ TALLOC_CTX *mem_ctx,
+ SAM_ACCOUNT *sampass,
+ const auth_usersupplied_info *user_info,
+ uint8 user_sess_key[16])
{
+ uint16 acct_ctrl;
const uint8 *nt_pw, *lm_pw;
- uint16 acct_ctrl = pdb_get_acct_ctrl(sampass);
-
- if (!user_info || !sampass)
- return NT_STATUS_LOGON_FAILURE;
+ uint32 auth_flags;
+ acct_ctrl = pdb_get_acct_ctrl(sampass);
if (acct_ctrl & ACB_PWNOTREQ)
{
if (lp_null_passwords())
{
- DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", sampass->username));
+ DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", pdb_get_username(sampass)));
return(NT_STATUS_OK);
}
else
{
- DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", sampass->username));
+ DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", pdb_get_username(sampass)));
return(NT_STATUS_LOGON_FAILURE);
}
}
- nt_pw = pdb_get_nt_passwd(sampass);
- lm_pw = pdb_get_lanman_passwd(sampass);
+ auth_flags = user_info->auth_flags;
+
+ if (IS_SAM_DEFAULT(sampass, PDB_NTPASSWD)) {
+ DEBUG(3,("sam_password_ok: NO NT password stored for user %s.\n",
+ pdb_get_username(sampass)));
+ /* No return, we want to check the LM hash below in this case */
+ auth_flags &= (~(AUTH_FLAG_NTLMv2_RESP | AUTH_FLAG_NTLM_RESP));
+ }
- if (nt_pw != NULL && user_info->nt_resp.len > 0) {
- if ((user_info->nt_resp.len > 24 )) {
+ if (auth_flags & AUTH_FLAG_NTLMv2_RESP) {
+ nt_pw = pdb_get_nt_passwd(sampass);
+ /* We have the NT MD4 hash challenge available - see if we can
+ use it (ie. does it exist in the smbpasswd file).
+ */
+ DEBUG(4,("sam_password_ok: Checking NTLMv2 password\n"));
+ if (smb_pwd_check_ntlmv2( user_info->nt_resp,
+ nt_pw, auth_context->challenge,
+ user_info->smb_name.str,
+ user_info->client_domain.str,
+ user_sess_key))
+ {
+ return NT_STATUS_OK;
+ } else {
+ DEBUG(3,("sam_password_ok: NTLMv2 password check failed\n"));
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+ } else if (auth_flags & AUTH_FLAG_NTLM_RESP) {
+ if (lp_ntlm_auth()) {
+ nt_pw = pdb_get_nt_passwd(sampass);
/* We have the NT MD4 hash challenge available - see if we can
use it (ie. does it exist in the smbpasswd file).
*/
- DEBUG(4,("smb_password_ok: Checking NTLMv2 password\n"));
- if (smb_pwd_check_ntlmv2( user_info->nt_resp.buffer,
- user_info->nt_resp.len,
- nt_pw,
- user_info->chal, user_info->smb_username.str,
- user_info->requested_domain.str,
- user_sess_key))
+ DEBUG(4,("sam_password_ok: Checking NT MD4 password\n"));
+ if (smb_pwd_check_ntlmv1(user_info->nt_resp,
+ nt_pw, auth_context->challenge,
+ user_sess_key))
{
return NT_STATUS_OK;
} else {
- DEBUG(4,("smb_password_ok: NTLMv2 password check failed\n"));
- return NT_STATUS_WRONG_PASSWORD;
+ DEBUG(3,("sam_password_ok: NT MD4 password check failed for user %s\n",pdb_get_username(sampass)));
+ return NT_STATUS_WRONG_PASSWORD;
}
-
- } else if (lp_ntlm_auth() && (user_info->nt_resp.len == 24)) {
- /* We have the NT MD4 hash challenge available - see if we can
- use it (ie. does it exist in the smbpasswd file).
- */
- DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
- if (smb_pwd_check_ntlmv1(user_info->nt_resp.buffer,
- nt_pw, user_info->chal,
+ } else {
+ DEBUG(2,("sam_password_ok: NTLMv1 passwords NOT PERMITTED for user %s\n",pdb_get_username(sampass)));
+ /* no return, becouse we might pick up LMv2 in the LM feild */
+ }
+ }
+
+ if (auth_flags & AUTH_FLAG_LM_RESP) {
+ if (user_info->lm_resp.length != 24) {
+ DEBUG(2,("sam_password_ok: invalid LanMan password length (%d) for user %s\n",
+ user_info->nt_resp.length, pdb_get_username(sampass)));
+ }
+
+ if (!lp_lanman_auth()) {
+ DEBUG(3,("sam_password_ok: Lanman passwords NOT PERMITTED for user %s\n",pdb_get_username(sampass)));
+ } else if (IS_SAM_DEFAULT(sampass, PDB_LMPASSWD)) {
+ DEBUG(3,("sam_password_ok: NO LanMan password set for user %s (and no NT password supplied)\n",pdb_get_username(sampass)));
+ } else {
+ lm_pw = pdb_get_lanman_passwd(sampass);
+
+ DEBUG(4,("sam_password_ok: Checking LM password\n"));
+ if (smb_pwd_check_ntlmv1(user_info->lm_resp,
+ lm_pw, auth_context->challenge,
user_sess_key))
{
return NT_STATUS_OK;
- } else {
- DEBUG(4,("smb_password_ok: NT MD4 password check failed\n"));
- return NT_STATUS_WRONG_PASSWORD;
}
- } else {
- return NT_STATUS_LOGON_FAILURE;
}
- }
- if (lm_pw != NULL && user_info->lm_resp.len == 24) {
- if (lp_lanman_auth()) {
- DEBUG(4,("smb_password_ok: Checking LM password\n"));
- if (smb_pwd_check_ntlmv1(user_info->lm_resp.buffer,
- lm_pw, user_info->chal,
+ if (IS_SAM_DEFAULT(sampass, PDB_NTPASSWD)) {
+ DEBUG(4,("sam_password_ok: LM password check failed for user, no NT password %s\n",pdb_get_username(sampass)));
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+ nt_pw = pdb_get_nt_passwd(sampass);
+
+ /* This is for 'LMv2' authentication. almost NTLMv2 but limited to 24 bytes.
+ - related to Win9X, legacy NAS pass-though authentication
+ */
+ DEBUG(4,("sam_password_ok: Checking LMv2 password\n"));
+ if (smb_pwd_check_ntlmv2( user_info->lm_resp,
+ nt_pw, auth_context->challenge,
+ user_info->smb_name.str,
+ user_info->client_domain.str,
+ user_sess_key))
+ {
+ 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,("sam_password_ok: Checking NT MD4 password in LM field\n"));
+ if (lp_ntlm_auth())
+ {
+ if (smb_pwd_check_ntlmv1(user_info->lm_resp,
+ nt_pw, auth_context->challenge,
user_sess_key))
{
return NT_STATUS_OK;
- } else {
- DEBUG(4,("smb_password_ok: LM password check failed\n"));
- return NT_STATUS_WRONG_PASSWORD;
- }
+ }
+ DEBUG(3,("sam_password_ok: LM password, NT MD4 password in LM field and LMv2 failed for user %s\n",pdb_get_username(sampass)));
+ return NT_STATUS_WRONG_PASSWORD;
+ } else {
+ DEBUG(3,("sam_password_ok: LM password and LMv2 failed for user %s, and NT MD4 password in LM field not permitted\n",pdb_get_username(sampass)));
+ return NT_STATUS_WRONG_PASSWORD;
}
+
}
-
- /* Should not be reached */
- return NT_STATUS_LOGON_FAILURE;
+
+ /* Should not be reached, but if they send nothing... */
+ DEBUG(3,("sam_password_ok: NEITHER LanMan nor NT password supplied for user %s\n",pdb_get_username(sampass)));
+ return NT_STATUS_WRONG_PASSWORD;
}
/****************************************************************************
Do a specific test for a SAM_ACCOUNT being vaild for this connection
(ie not disabled, expired and the like).
****************************************************************************/
-NTSTATUS sam_account_ok(SAM_ACCOUNT *sampass, const auth_usersupplied_info *user_info)
+static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
+ SAM_ACCOUNT *sampass,
+ const auth_usersupplied_info *user_info)
{
uint16 acct_ctrl = pdb_get_acct_ctrl(sampass);
char *workstation_list;
time_t kickoff_time;
- if (!user_info || !sampass)
- return NT_STATUS_LOGON_FAILURE;
-
- DEBUG(4,("smb_password_ok: Checking SMB password for user %s\n",sampass->username));
+ DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
/* Quit if the account was disabled. */
if (acct_ctrl & ACB_DISABLED) {
- DEBUG(1,("Account for user '%s' was disabled.\n", sampass->username));
+ DEBUG(1,("Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
return NT_STATUS_ACCOUNT_DISABLED;
}
kickoff_time = pdb_get_kickoff_time(sampass);
if (kickoff_time != 0 && time(NULL) > kickoff_time) {
- DEBUG(1,("Account for user '%s' has expried.\n", sampass->username));
+ DEBUG(1,("Account for user '%s' has expried.\n", pdb_get_username(sampass)));
DEBUG(3,("Account expired at '%ld' unix time.\n", (long)kickoff_time));
return NT_STATUS_ACCOUNT_EXPIRED;
}
+ if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP)) {
+ time_t must_change_time = pdb_get_pass_must_change_time(sampass);
+ time_t last_set_time = pdb_get_pass_last_set_time(sampass);
+
+ /* check for immediate expiry "must change at next logon" */
+ if (must_change_time == 0 && last_set_time != 0) {
+ DEBUG(1,("Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
+ return NT_STATUS_PASSWORD_MUST_CHANGE;
+ }
+
+ /* check for expired password */
+ if (must_change_time < time(NULL) && must_change_time != 0) {
+ DEBUG(1,("Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
+ DEBUG(1,("Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
+ return NT_STATUS_PASSWORD_EXPIRED;
+ }
+ }
+
/* Test workstation. Workstation list is comma separated. */
- workstation_list = strdup(pdb_get_workstations(sampass));
+ workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
if (!workstation_list) return NT_STATUS_NO_MEMORY;
if (*workstation_list) {
BOOL invalid_ws = True;
- char *s = workstation_list;
+ const char *s = workstation_list;
fstring tok;
}
}
- SAFE_FREE(workstation_list);
if (invalid_ws)
return NT_STATUS_INVALID_WORKSTATION;
- } else {
- SAFE_FREE(workstation_list);
- }
-
- if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP)) {
- time_t must_change_time = pdb_get_pass_must_change_time(sampass);
- time_t last_set_time = pdb_get_pass_last_set_time(sampass);
-
- /* check for immediate expiry "must change at next logon" */
- if (must_change_time == 0 && last_set_time != 0) {
- DEBUG(1,("Account for user '%s' password must change!.\n", sampass->username));
- return NT_STATUS_PASSWORD_MUST_CHANGE;
- }
-
- /* check for expired password */
- if (must_change_time < time(NULL) && must_change_time != 0) {
- DEBUG(1,("Account for user '%s' password expired!.\n", sampass->username));
- DEBUG(1,("Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
- return NT_STATUS_PASSWORD_EXPIRED;
- }
}
if (acct_ctrl & ACB_DOMTRUST) {
- DEBUG(2,("session_trust_account: Domain trust account %s denied by server\n", sampass->username));
+ DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
}
if (acct_ctrl & ACB_SVRTRUST) {
- DEBUG(2,("session_trust_account: Server trust account %s denied by server\n", sampass->username));
+ DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
}
if (acct_ctrl & ACB_WSTRUST) {
- DEBUG(4,("session_trust_account: Wksta trust account %s denied by server\n", sampass->username));
+ DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
}
return an NT_STATUS constant.
****************************************************************************/
-NTSTATUS check_smbpasswd_security(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+static NTSTATUS check_sam_security(const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const auth_usersupplied_info *user_info,
+ auth_serversupplied_info **server_info)
{
SAM_ACCOUNT *sampass=NULL;
BOOL ret;
NTSTATUS nt_status;
+ uint8 user_sess_key[16];
+ const uint8* lm_hash;
+
+ if (!user_info || !auth_context) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
- pdb_init_sam(&sampass);
+ /* Can't use the talloc version here, becouse the returned struct gets
+ kept on the server_info */
+ if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
+ return nt_status;
+ }
/* get the account information */
become_root();
- ret = pdb_getsampwnam(sampass, user_info->unix_username.str);
+ ret = pdb_getsampwnam(sampass, user_info->internal_username.str);
unbecome_root();
if (ret == False)
{
- DEBUG(1,("Couldn't find user '%s' in passdb file.\n", user_info->unix_username.str));
+ DEBUG(3,("Couldn't find user '%s' in passdb file.\n", user_info->internal_username.str));
pdb_free_sam(&sampass);
return NT_STATUS_NO_SUCH_USER;
}
- nt_status = sam_password_ok(sampass, user_info, (char *)(server_info->session_key));
+ nt_status = sam_account_ok(mem_ctx, sampass, user_info);
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ pdb_free_sam(&sampass);
+ return nt_status;
+ }
+
+ nt_status = sam_password_ok(auth_context, mem_ctx, sampass, user_info, user_sess_key);
- if NT_STATUS_IS_OK(nt_status) {
- nt_status = sam_account_ok(sampass, user_info);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ pdb_free_sam(&sampass);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = make_server_info_sam(server_info, sampass))) {
+ DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
+ return nt_status;
}
- pdb_free_sam(&sampass);
+ lm_hash = pdb_get_lanman_passwd((*server_info)->sam_account);
+ if (lm_hash) {
+ memcpy((*server_info)->first_8_lm_hash, lm_hash, 8);
+ }
+
+ memcpy((*server_info)->session_key, user_sess_key, sizeof(user_sess_key));
+
return nt_status;
}
+
+/* module initialisation */
+NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+{
+ if (!make_auth_methods(auth_context, auth_method)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ (*auth_method)->auth = check_sam_security;
+ (*auth_method)->name = "sam";
+ return NT_STATUS_OK;
+}
+
+
+/****************************************************************************
+Check SAM security (above) but with a few extra checks.
+****************************************************************************/
+
+static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const auth_usersupplied_info *user_info,
+ auth_serversupplied_info **server_info)
+{
+
+ if (!user_info || !auth_context) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ /* If we are a domain member, we must not
+ attempt to check the password locally,
+ unless it is one of our aliases. */
+
+ if (!is_myname(user_info->domain.str)) {
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
+}
+
+/* module initialisation */
+NTSTATUS auth_init_samstrict(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+{
+ if (!make_auth_methods(auth_context, auth_method)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ (*auth_method)->auth = check_samstrict_security;
+ (*auth_method)->name = "samstrict";
+ return NT_STATUS_OK;
+}
+
+
git.samba.org / kai / samba.git / blobdiff