Password and authentication handling
Copyright (C) Andrew Tridgell 1992-2000
Copyright (C) Luke Kenneth Casson Leighton 1996-2000
- Copyright (C) Andrew Bartlett 2001
+ Copyright (C) Andrew Bartlett 2001-2003
+ Copyright (C) Gerald Carter 2003
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
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
-/****************************************************************************
-core of smb password checking routine.
-****************************************************************************/
-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;
- }
-
- 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, 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, nt_response.data, nt_response.length);
- DEBUG(100,("Given challenge was |"));
- dump_data(100, sec_blob.data, sec_blob.length);
- DEBUG(100,("Value from encryption was |"));
- 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 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 value_from_encryption[16];
- uchar 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 (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, 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, 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, sec_blob.data, sec_blob.length);
- DEBUG(100,("Value from encryption was |"));
- dump_data(100, value_from_encryption, 16);
-#endif
- 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.
****************************************************************************/
+
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])
+ DATA_BLOB *user_sess_key,
+ DATA_BLOB *lm_sess_key)
{
uint16 acct_ctrl;
- const uint8 *nt_pw, *lm_pw;
- uint32 auth_flags;
+ const uint8 *lm_pw, *nt_pw;
+ const char *username = pdb_get_username(sampass);
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", 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", pdb_get_username(sampass)));
- return(NT_STATUS_LOGON_FAILURE);
- }
- }
-
- 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 (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 with domain [%s]\n", user_info->client_domain.str));
- 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;
- }
-
- DEBUG(4,("sam_password_ok: Checking NTLMv2 password without a domain\n"));
- if (smb_pwd_check_ntlmv2( user_info->nt_resp,
- nt_pw, auth_context->challenge,
- user_info->smb_name.str,
- "",
- user_sess_key))
- {
+ if (acct_ctrl & ACB_PWNOTREQ) {
+ if (lp_null_passwords()) {
+ DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
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,("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(3,("sam_password_ok: NT MD4 password check failed for user %s\n",pdb_get_username(sampass)));
- return NT_STATUS_WRONG_PASSWORD;
- }
- } 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 */
- }
+ DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
+ return NT_STATUS_LOGON_FAILURE;
+ }
}
-
- 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;
- }
- }
- 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 with domain %s\n", user_info->client_domain.str));
- 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;
- }
-
- DEBUG(4,("sam_password_ok: Checking LMv2 password without a domain\n"));
- if (smb_pwd_check_ntlmv2( user_info->lm_resp,
- nt_pw, auth_context->challenge,
- user_info->smb_name.str,
- "",
- user_sess_key))
- {
- return NT_STATUS_OK;
- }
+ lm_pw = pdb_get_lanman_passwd(sampass);
+ nt_pw = pdb_get_nt_passwd(sampass);
- /* 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;
- }
- 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, 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;
+ return ntlm_password_check(mem_ctx, &auth_context->challenge,
+ &user_info->lm_resp, &user_info->nt_resp,
+ &user_info->lm_interactive_pwd, &user_info->nt_interactive_pwd,
+ username,
+ user_info->smb_name.str,
+ user_info->client_domain.str,
+ lm_pw, nt_pw, user_sess_key, lm_sess_key);
}
+
/****************************************************************************
Do a specific test for a SAM_ACCOUNT being vaild for this connection
(ie not disabled, expired and the like).
****************************************************************************/
+
static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
SAM_ACCOUNT *sampass,
const auth_usersupplied_info *user_info)
/* Quit if the account was disabled. */
if (acct_ctrl & ACB_DISABLED) {
- DEBUG(1,("Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
+ DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
return NT_STATUS_ACCOUNT_DISABLED;
}
+ /* Quit if the account was locked out. */
+ if (acct_ctrl & ACB_AUTOLOCK) {
+ DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
+ return NT_STATUS_ACCOUNT_LOCKED_OUT;
+ }
+
/* Test account expire time */
kickoff_time = pdb_get_kickoff_time(sampass);
if (kickoff_time != 0 && time(NULL) > kickoff_time) {
- 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));
+ DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
+ DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
return NT_STATUS_ACCOUNT_EXPIRED;
}
/* 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)));
+ DEBUG(1,("sam_account_ok: 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", timestring(mem_ctx, must_change_time), (long)must_change_time));
+ DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
+ DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", timestring(mem_ctx, must_change_time), (long)must_change_time));
return NT_STATUS_PASSWORD_EXPIRED;
}
}
/* Test workstation. Workstation list is comma separated. */
workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
-
- if (!workstation_list) return NT_STATUS_NO_MEMORY;
+ if (!workstation_list)
+ return NT_STATUS_NO_MEMORY;
if (*workstation_list) {
BOOL invalid_ws = True;
fstring tok;
while (next_token(&s, tok, ",", sizeof(tok))) {
- DEBUG(10,("checking for workstation match %s and %s (len=%d)\n",
+ DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
tok, user_info->wksta_name.str, user_info->wksta_name.len));
if(strequal(tok, user_info->wksta_name.str)) {
invalid_ws = False;
return NT_STATUS_OK;
}
-
/****************************************************************************
check if a username/password is OK assuming the password is a 24 byte
SMB hash supplied in the user_info structure
SAM_ACCOUNT *sampass=NULL;
BOOL ret;
NTSTATUS nt_status;
- uint8 user_sess_key[16];
- const uint8* lm_hash;
+ DATA_BLOB user_sess_key = data_blob(NULL, 0);
+ DATA_BLOB lm_sess_key = data_blob(NULL, 0);
if (!user_info || !auth_context) {
return NT_STATUS_UNSUCCESSFUL;
}
- /* Can't use the talloc version here, becouse the returned struct gets
+ /* Can't use the talloc version here, because the returned struct gets
kept on the server_info */
if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
return nt_status;
ret = pdb_getsampwnam(sampass, user_info->internal_username.str);
unbecome_root();
- if (ret == False)
- {
- DEBUG(3,("Couldn't find user '%s' in passdb file.\n", user_info->internal_username.str));
+ if (ret == False) {
+ DEBUG(3,("check_sam_security: 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_account_ok(mem_ctx, sampass, user_info);
+ /* Quit if the account was locked out. */
+ if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
+ DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
+ return NT_STATUS_ACCOUNT_LOCKED_OUT;
+ }
+
+ nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
+ user_info, &user_sess_key, &lm_sess_key);
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);
+ nt_status = sam_account_ok(mem_ctx, sampass, user_info);
if (!NT_STATUS_IS_OK(nt_status)) {
pdb_free_sam(&sampass);
return nt_status;
}
- 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));
+ (*server_info)->user_session_key = user_sess_key;
+ (*server_info)->lm_session_key = lm_sess_key;
return nt_status;
}
/* module initialisation */
-static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+static NTSTATUS auth_init_sam_ignoredomain(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";
+ (*auth_method)->name = "sam_ignoredomain";
return NT_STATUS_OK;
}
}
/* module initialisation */
-static NTSTATUS auth_init_samstrict(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+static 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_samstrict_security;
- (*auth_method)->name = "samstrict";
- return NT_STATUS_OK;
-}
-
-/****************************************************************************
-Check SAM security (above) but with a few extra checks if we're a DC.
-****************************************************************************/
-
-static NTSTATUS check_samstrict_dc_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, empty
- or our domain if we are a logon server.*/
-
-
- if ((strcasecmp(lp_workgroup(), user_info->domain.str) != 0) &&
- (!is_myname(user_info->domain.str))) {
- DEBUG(7,("The requested user domain is not the local server name or our domain. [%s]\\[%s]\n",
- user_info->domain.str,user_info->internal_username.str));
- return NT_STATUS_NO_SUCH_USER;
- }
-
- return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
-}
-
-/* module initialisation */
-static NTSTATUS auth_init_samstrict_dc(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_dc_security;
- (*auth_method)->name = "samstrict_dc";
+ (*auth_method)->name = "sam";
return NT_STATUS_OK;
}
return ret;
}
- ops.name = "samstrict";
- ops.init = auth_init_samstrict;
- ret = register_backend("auth", &ops);
- if (!NT_STATUS_IS_OK(ret)) {
- DEBUG(0,("Failed to register '%s' auth backend!\n",
- ops.name));
- return ret;
- }
-
- ops.name = "samstrict_dc";
- ops.init = auth_init_samstrict_dc;
+ ops.name = "sam_ignoredomain";
+ ops.init = auth_init_sam_ignoredomain;
ret = register_backend("auth", &ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register '%s' auth backend!\n",
git.samba.org / jelmer / samba4-debian.git / blobdiff