Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Bartlett 2001-2002
-
+
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/>.
*/
#include "includes.h"
+#include "smbd/globals.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
-static struct auth_init_function_entry *backends = NULL;
+static_decl_auth;
+
+static struct auth_init_function_entry *auth_backends = NULL;
static struct auth_init_function_entry *auth_find_backend_entry(const char *name);
NTSTATUS smb_register_auth(int version, const char *name, auth_init_function init)
{
- struct auth_init_function_entry *entry = backends;
+ struct auth_init_function_entry *entry = auth_backends;
if (version != AUTH_INTERFACE_VERSION) {
DEBUG(0,("Can't register auth_method!\n"
DEBUG(0,("There already is an auth method registered with the name %s!\n", name));
return NT_STATUS_OBJECT_NAME_COLLISION;
}
-
- entry = smb_xmalloc(sizeof(struct auth_init_function_entry));
+
+ entry = SMB_XMALLOC_P(struct auth_init_function_entry);
entry->name = smb_xstrdup(name);
entry->init = init;
- DLIST_ADD(backends, entry);
+ DLIST_ADD(auth_backends, entry);
DEBUG(5,("Successfully added auth method '%s'\n", name));
return NT_STATUS_OK;
}
static struct auth_init_function_entry *auth_find_backend_entry(const char *name)
{
- struct auth_init_function_entry *entry = backends;
+ struct auth_init_function_entry *entry = auth_backends;
while(entry) {
if (strcmp(entry->name, name)==0) return entry;
entry = entry->next;
}
-
+
return NULL;
}
Returns a const char of length 8 bytes.
****************************************************************************/
-static const uint8 *get_ntlm_challenge(struct auth_context *auth_context)
+static NTSTATUS get_ntlm_challenge(struct auth_context *auth_context,
+ uint8_t chal[8])
{
- DATA_BLOB challenge = data_blob(NULL, 0);
+ DATA_BLOB challenge = data_blob_null;
const char *challenge_set_by = NULL;
auth_methods *auth_method;
- TALLOC_CTX *mem_ctx;
if (auth_context->challenge.length) {
DEBUG(5, ("get_ntlm_challenge (auth subsystem): returning previous challenge by module %s (normal)\n",
auth_context->challenge_set_by));
- return auth_context->challenge.data;
+ memcpy(chal, auth_context->challenge.data, 8);
+ return NT_STATUS_OK;
}
+ auth_context->challenge_may_be_modified = False;
+
for (auth_method = auth_context->auth_method_list; auth_method; auth_method = auth_method->next) {
if (auth_method->get_chal == NULL) {
DEBUG(5, ("auth_get_challenge: module %s did not want to specify a challenge\n", auth_method->name));
continue;
}
- mem_ctx = talloc_init("auth_get_challenge for module %s", auth_method->name);
- if (!mem_ctx) {
- smb_panic("talloc_init() failed!");
- }
-
- challenge = auth_method->get_chal(auth_context, &auth_method->private_data, mem_ctx);
+ challenge = auth_method->get_chal(auth_context, &auth_method->private_data,
+ auth_context);
if (!challenge.length) {
DEBUG(3, ("auth_get_challenge: getting challenge from authentication method %s FAILED.\n",
auth_method->name));
} else {
- DEBUG(5, ("auth_get_challenge: sucessfully got challenge from module %s\n", auth_method->name));
+ DEBUG(5, ("auth_get_challenge: successfully got challenge from module %s\n", auth_method->name));
auth_context->challenge = challenge;
challenge_set_by = auth_method->name;
auth_context->challenge_set_method = auth_method;
}
- talloc_destroy(mem_ctx);
}
-
+
if (!challenge_set_by) {
- uchar chal[8];
-
- generate_random_buffer(chal, sizeof(chal), False);
- auth_context->challenge = data_blob_talloc(auth_context->mem_ctx,
- chal, sizeof(chal));
-
+ uchar tmp[8];
+
+ generate_random_buffer(tmp, sizeof(tmp));
+ auth_context->challenge = data_blob_talloc(auth_context,
+ tmp, sizeof(tmp));
+
challenge_set_by = "random";
+ auth_context->challenge_may_be_modified = True;
}
-
+
DEBUG(5, ("auth_context challenge created by %s\n", challenge_set_by));
DEBUG(5, ("challenge is: \n"));
dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
-
+
SMB_ASSERT(auth_context->challenge.length == 8);
auth_context->challenge_set_by=challenge_set_by;
- return auth_context->challenge.data;
+ memcpy(chal, auth_context->challenge.data, 8);
+ return NT_STATUS_OK;
}
* False otherwise.
**/
-static BOOL check_domain_match(const char *user, const char *domain)
+static bool check_domain_match(const char *user, const char *domain)
{
/*
* If we aren't serving to trusted domains, we must make sure that
* function auth_get_challenge().
*
* @param server_info If successful, contains information about the authentication,
- * including a SAM_ACCOUNT struct describing the user.
+ * including a struct samu struct describing the user.
*
* @return An NTSTATUS with NT_STATUS_OK or an appropriate error.
*
const struct auth_usersupplied_info *user_info,
struct auth_serversupplied_info **server_info)
{
-
- NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
- const char *pdb_username;
+ /* if all the modules say 'not for me' this is reasonable */
+ NTSTATUS nt_status = NT_STATUS_NO_SUCH_USER;
+ const char *unix_username;
auth_methods *auth_method;
TALLOC_CTX *mem_ctx;
return NT_STATUS_LOGON_FAILURE;
DEBUG(3, ("check_ntlm_password: Checking password for unmapped user [%s]\\[%s]@[%s] with the new password interface\n",
- user_info->client_domain.str, user_info->smb_name.str, user_info->wksta_name.str));
+ user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name));
DEBUG(3, ("check_ntlm_password: mapped user is: [%s]\\[%s]@[%s]\n",
- user_info->domain.str, user_info->internal_username.str, user_info->wksta_name.str));
+ user_info->mapped.domain_name, user_info->mapped.account_name, user_info->workstation_name));
if (auth_context->challenge.length != 8) {
DEBUG(0, ("check_ntlm_password: Invalid challenge stored for this auth context - cannot continue\n"));
#ifdef DEBUG_PASSWORD
DEBUG(100, ("user_info has passwords of length %d and %d\n",
- user_info->lm_resp.length, user_info->nt_resp.length));
+ (int)user_info->password.response.lanman.length, (int)user_info->password.response.nt.length));
DEBUG(100, ("lm:\n"));
- dump_data(100, user_info->lm_resp.data, user_info->lm_resp.length);
+ dump_data(100, user_info->password.response.lanman.data, user_info->password.response.lanman.length);
DEBUG(100, ("nt:\n"));
- dump_data(100, user_info->nt_resp.data, user_info->nt_resp.length);
+ dump_data(100, user_info->password.response.nt.data, user_info->password.response.nt.length);
#endif
/* This needs to be sorted: If it doesn't match, what should we do? */
- if (!check_domain_match(user_info->smb_name.str, user_info->domain.str))
+ if (!check_domain_match(user_info->client.account_name, user_info->mapped.domain_name))
return NT_STATUS_LOGON_FAILURE;
for (auth_method = auth_context->auth_method_list;auth_method; auth_method = auth_method->next) {
- mem_ctx = talloc_init("%s authentication for user %s\\%s", auth_method->name,
- user_info->domain.str, user_info->smb_name.str);
+ NTSTATUS result;
+
+ mem_ctx = talloc_init("%s authentication for user %s\\%s", auth_method->name,
+ user_info->mapped.domain_name, user_info->client.account_name);
+
+ result = auth_method->auth(auth_context, auth_method->private_data, mem_ctx, user_info, server_info);
+
+ /* check if the module did anything */
+ if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_NOT_IMPLEMENTED) ) {
+ DEBUG(10,("check_ntlm_password: %s had nothing to say\n", auth_method->name));
+ talloc_destroy(mem_ctx);
+ continue;
+ }
+
+ nt_status = result;
- nt_status = auth_method->auth(auth_context, auth_method->private_data, mem_ctx, user_info, server_info);
if (NT_STATUS_IS_OK(nt_status)) {
- DEBUG(3, ("check_ntlm_password: %s authentication for user [%s] suceeded\n",
- auth_method->name, user_info->smb_name.str));
+ DEBUG(3, ("check_ntlm_password: %s authentication for user [%s] succeeded\n",
+ auth_method->name, user_info->client.account_name));
} else {
DEBUG(5, ("check_ntlm_password: %s authentication for user [%s] FAILED with error %s\n",
- auth_method->name, user_info->smb_name.str, nt_errstr(nt_status)));
+ auth_method->name, user_info->client.account_name, nt_errstr(nt_status)));
}
talloc_destroy(mem_ctx);
- if (NT_STATUS_IS_OK(nt_status))
- break;
+ if ( NT_STATUS_IS_OK(nt_status))
+ {
+ break;
+ }
}
- /* This is one of the few places the *relies* (rather than just sets defaults
- on the value of lp_security(). This needs to change. A new paramater
- perhaps? */
- if (lp_security() >= SEC_SERVER)
- smb_user_control(user_info, *server_info, nt_status);
+ /* successful authentication */
if (NT_STATUS_IS_OK(nt_status)) {
- pdb_username = pdb_get_username((*server_info)->sam_account);
+ unix_username = (*server_info)->unix_name;
if (!(*server_info)->guest) {
/* We might not be root if we are an RPC call */
become_root();
- nt_status = smb_pam_accountcheck(pdb_username);
+ nt_status = smb_pam_accountcheck(
+ unix_username,
+ smbd_server_conn->client_id.name);
unbecome_root();
-
+
if (NT_STATUS_IS_OK(nt_status)) {
- DEBUG(5, ("check_ntlm_password: PAM Account for user [%s] suceeded\n",
- pdb_username));
+ DEBUG(5, ("check_ntlm_password: PAM Account for user [%s] succeeded\n",
+ unix_username));
} else {
DEBUG(3, ("check_ntlm_password: PAM Account for user [%s] FAILED with error %s\n",
- pdb_username, nt_errstr(nt_status)));
+ unix_username, nt_errstr(nt_status)));
}
}
-
+
if (NT_STATUS_IS_OK(nt_status)) {
DEBUG((*server_info)->guest ? 5 : 2,
- ("check_ntlm_password: %sauthentication for user [%s] -> [%s] -> [%s] suceeded\n",
- (*server_info)->guest ? "guest " : "",
- user_info->smb_name.str,
- user_info->internal_username.str,
- pdb_username));
+ ("check_ntlm_password: %sauthentication for user [%s] -> [%s] -> [%s] succeeded\n",
+ (*server_info)->guest ? "guest " : "",
+ user_info->client.account_name,
+ user_info->mapped.account_name,
+ unix_username));
}
- }
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(2, ("check_ntlm_password: Authentication for user [%s] -> [%s] FAILED with error %s\n",
- user_info->smb_name.str, user_info->internal_username.str,
- nt_errstr(nt_status)));
- ZERO_STRUCTP(server_info);
+ return nt_status;
}
+
+ /* failed authentication; check for guest lapping */
+
+ DEBUG(2, ("check_ntlm_password: Authentication for user [%s] -> [%s] FAILED with error %s\n",
+ user_info->client.account_name, user_info->mapped.account_name,
+ nt_errstr(nt_status)));
+ ZERO_STRUCTP(server_info);
+
return nt_status;
}
Clear out a auth_context, and destroy the attached TALLOC_CTX
***************************************************************************/
-static void free_auth_context(struct auth_context **auth_context)
+static int auth_context_destructor(void *ptr)
{
- if (*auth_context != NULL)
- talloc_destroy((*auth_context)->mem_ctx);
- *auth_context = NULL;
+ struct auth_context *ctx = talloc_get_type(ptr, struct auth_context);
+ struct auth_methods *am;
+
+
+ /* Free private data of context's authentication methods */
+ for (am = ctx->auth_method_list; am; am = am->next) {
+ TALLOC_FREE(am->private_data);
+ }
+
+ return 0;
}
/***************************************************************************
Make a auth_info struct
***************************************************************************/
-static NTSTATUS make_auth_context(struct auth_context **auth_context)
+static NTSTATUS make_auth_context(TALLOC_CTX *mem_ctx,
+ struct auth_context **auth_context)
{
- TALLOC_CTX *mem_ctx;
+ struct auth_context *ctx;
- mem_ctx = talloc_init("authentication context");
-
- *auth_context = talloc(mem_ctx, sizeof(**auth_context));
- if (!*auth_context) {
+ ctx = talloc_zero(mem_ctx, struct auth_context);
+ if (!ctx) {
DEBUG(0,("make_auth_context: talloc failed!\n"));
- talloc_destroy(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
- ZERO_STRUCTP(*auth_context);
- (*auth_context)->mem_ctx = mem_ctx;
- (*auth_context)->check_ntlm_password = check_ntlm_password;
- (*auth_context)->get_ntlm_challenge = get_ntlm_challenge;
- (*auth_context)->free = free_auth_context;
-
+ ctx->check_ntlm_password = check_ntlm_password;
+ ctx->get_ntlm_challenge = get_ntlm_challenge;
+
+ talloc_set_destructor((TALLOC_CTX *)ctx, auth_context_destructor);
+
+ *auth_context = ctx;
return NT_STATUS_OK;
}
-BOOL load_auth_module(struct auth_context *auth_context,
+bool load_auth_module(struct auth_context *auth_context,
const char *module, auth_methods **ret)
{
- static BOOL initialised_static_modules = False;
+ static bool initialised_static_modules = False;
struct auth_init_function_entry *entry;
char *module_name = smb_xstrdup(module);
char *module_params = NULL;
char *p;
- BOOL good = False;
+ bool good = False;
/* Initialise static modules if not done so yet */
if(!initialised_static_modules) {
static_init_auth;
initialised_static_modules = True;
}
-
+
DEBUG(5,("load_auth_module: Attempting to find an auth method to match %s\n",
module));
-
+
p = strchr(module_name, ':');
if (p) {
*p = 0;
module_params = p+1;
- trim_string(module_params, " ", " ");
+ trim_char(module_params, ' ', ' ');
}
-
- trim_string(module_name, " ", " ");
-
+
+ trim_char(module_name, ' ', ' ');
+
entry = auth_find_backend_entry(module_name);
-
+
if (entry == NULL) {
if (NT_STATUS_IS_OK(smb_probe_module("auth", module_name))) {
entry = auth_find_backend_entry(module_name);
Make a auth_info struct for the auth subsystem
***************************************************************************/
-static NTSTATUS make_auth_context_text_list(struct auth_context **auth_context, char **text_list)
+static NTSTATUS make_auth_context_text_list(TALLOC_CTX *mem_ctx,
+ struct auth_context **auth_context,
+ char **text_list)
{
auth_methods *list = NULL;
auth_methods *t = NULL;
- auth_methods *tmp;
NTSTATUS nt_status;
if (!text_list) {
DEBUG(2,("make_auth_context_text_list: No auth method list!?\n"));
return NT_STATUS_UNSUCCESSFUL;
}
-
- if (!NT_STATUS_IS_OK(nt_status = make_auth_context(auth_context)))
+
+ nt_status = make_auth_context(mem_ctx, auth_context);
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
+ }
for (;*text_list; text_list++) {
if (load_auth_module(*auth_context, *text_list, &t)) {
- DLIST_ADD_END(list, t, tmp);
+ DLIST_ADD_END(list, t, auth_methods *);
}
}
-
+
(*auth_context)->auth_method_list = list;
-
+
return nt_status;
}
Make a auth_context struct for the auth subsystem
***************************************************************************/
-NTSTATUS make_auth_context_subsystem(struct auth_context **auth_context)
+NTSTATUS make_auth_context_subsystem(TALLOC_CTX *mem_ctx,
+ struct auth_context **auth_context)
{
char **auth_method_list = NULL;
NTSTATUS nt_status;
- if (lp_auth_methods() && !str_list_copy(&auth_method_list, lp_auth_methods())) {
+ if (lp_auth_methods()
+ && !(auth_method_list = str_list_copy(talloc_tos(),
+ lp_auth_methods()))) {
return NT_STATUS_NO_MEMORY;
}
{
case SEC_DOMAIN:
DEBUG(5,("Making default auth method list for security=domain\n"));
- auth_method_list = str_list_make("guest sam winbind:ntdomain", NULL);
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest sam winbind:ntdomain",
+ NULL);
break;
case SEC_SERVER:
DEBUG(5,("Making default auth method list for security=server\n"));
- auth_method_list = str_list_make("guest sam smbserver", NULL);
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest sam smbserver",
+ NULL);
break;
case SEC_USER:
if (lp_encrypted_passwords()) {
- DEBUG(5,("Making default auth method list for security=user, encrypt passwords = yes\n"));
- auth_method_list = str_list_make("guest sam", NULL);
+ if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
+ DEBUG(5,("Making default auth method list for DC, security=user, encrypt passwords = yes\n"));
+ auth_method_list = str_list_make_v3(
+ talloc_tos(),
+ "guest sam winbind:trustdomain",
+ NULL);
+ } else {
+ DEBUG(5,("Making default auth method list for standalone security=user, encrypt passwords = yes\n"));
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest sam",
+ NULL);
+ }
} else {
DEBUG(5,("Making default auth method list for security=user, encrypt passwords = no\n"));
- auth_method_list = str_list_make("guest unix", NULL);
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest unix", NULL);
}
break;
case SEC_SHARE:
if (lp_encrypted_passwords()) {
DEBUG(5,("Making default auth method list for security=share, encrypt passwords = yes\n"));
- auth_method_list = str_list_make("guest sam", NULL);
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest sam", NULL);
} else {
DEBUG(5,("Making default auth method list for security=share, encrypt passwords = no\n"));
- auth_method_list = str_list_make("guest unix", NULL);
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest unix", NULL);
}
break;
case SEC_ADS:
DEBUG(5,("Making default auth method list for security=ADS\n"));
- auth_method_list = str_list_make("guest sam winbind:ntdomain", NULL);
+ auth_method_list = str_list_make_v3(
+ talloc_tos(), "guest sam winbind:ntdomain",
+ NULL);
break;
default:
DEBUG(5,("Unknown auth method!\n"));
} else {
DEBUG(5,("Using specified auth order\n"));
}
-
- if (!NT_STATUS_IS_OK(nt_status = make_auth_context_text_list(auth_context, auth_method_list))) {
- str_list_free(&auth_method_list);
- return nt_status;
- }
-
- str_list_free(&auth_method_list);
+
+ nt_status = make_auth_context_text_list(mem_ctx, auth_context,
+ auth_method_list);
+
+ TALLOC_FREE(auth_method_list);
return nt_status;
}
NTSTATUS make_auth_context_fixed(struct auth_context **auth_context, uchar chal[8])
{
NTSTATUS nt_status;
- if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(auth_context))) {
+ nt_status = make_auth_context_subsystem(talloc_autofree_context(),
+ auth_context);
+ if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
-
- (*auth_context)->challenge = data_blob(chal, 8);
+
+ (*auth_context)->challenge = data_blob_talloc(*auth_context, chal, 8);
(*auth_context)->challenge_set_by = "fixed";
return nt_status;
}
git.samba.org / mat / samba.git / blobdiff