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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
-/** List of various built-in authentication modules */
-
-static const struct auth_init_function_entry builtin_auth_init_functions[] = {
- { "guest", auth_init_guest },
- { "rhosts", auth_init_rhosts },
- { "hostsequiv", auth_init_hostsequiv },
- { "sam", auth_init_sam },
- { "samstrict", auth_init_samstrict },
- { "samstrict_dc", auth_init_samstrict_dc },
- { "unix", auth_init_unix },
- { "smbserver", auth_init_smbserver },
- { "ntdomain", auth_init_ntdomain },
- { "trustdomain", auth_init_trustdomain },
- { "winbind", auth_init_winbind },
-#ifdef DEVELOPER
- { "name_to_ntstatus", auth_init_name_to_ntstatus },
- { "fixed_challenge", auth_init_fixed_challenge },
-#endif
- { "plugin", auth_init_plugin },
- { NULL, NULL}
-};
+static_decl_auth;
+
+static struct auth_init_function_entry *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;
+
+ if (version != AUTH_INTERFACE_VERSION) {
+ DEBUG(0,("Can't register auth_method!\n"
+ "You tried to register an auth module with AUTH_INTERFACE_VERSION %d, while this version of samba uses %d\n",
+ version,AUTH_INTERFACE_VERSION));
+ return NT_STATUS_OBJECT_TYPE_MISMATCH;
+ }
+
+ if (!name || !init) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ DEBUG(5,("Attempting to register auth backend %s\n", name));
+
+ if (auth_find_backend_entry(name)) {
+ DEBUG(0,("There already is an auth method registered with the name %s!\n", name));
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+
+ entry = SMB_XMALLOC_P(struct auth_init_function_entry);
+ entry->name = smb_xstrdup(name);
+ entry->init = init;
+
+ DLIST_ADD(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;
+
+ while(entry) {
+ if (strcmp(entry->name, name)==0) return entry;
+ entry = entry->next;
+ }
+
+ return NULL;
+}
/****************************************************************************
Try to get a challenge out of the various authentication modules.
Returns a const char of length 8 bytes.
****************************************************************************/
-static const uint8 *get_ntlm_challenge(struct auth_context *auth_context)
+static void 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;
}
+ 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->mem_ctx);
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);
+ uchar tmp[8];
+
+ generate_random_buffer(tmp, sizeof(tmp));
auth_context->challenge = data_blob_talloc(auth_context->mem_ctx,
- chal, sizeof(chal));
-
+ 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);
}
* 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, user_info->smb_name, user_info->wksta_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->domain, user_info->internal_username, user_info->wksta_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->lm_resp.length, (int)user_info->nt_resp.length));
DEBUG(100, ("lm:\n"));
dump_data(100, user_info->lm_resp.data, user_info->lm_resp.length);
DEBUG(100, ("nt:\n"));
#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->smb_name, user_info->domain))
return NT_STATUS_LOGON_FAILURE;
for (auth_method = auth_context->auth_method_list;auth_method; auth_method = auth_method->next) {
+ NTSTATUS result;
+
mem_ctx = talloc_init("%s authentication for user %s\\%s", auth_method->name,
- user_info->domain.str, user_info->smb_name.str);
+ user_info->domain, user_info->smb_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->smb_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->smb_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);
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",
+ ("check_ntlm_password: %sauthentication for user [%s] -> [%s] -> [%s] succeeded\n",
(*server_info)->guest ? "guest " : "",
- user_info->smb_name.str,
- user_info->internal_username.str,
- pdb_username));
+ user_info->smb_name,
+ user_info->internal_username,
+ 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->smb_name, user_info->internal_username,
+ nt_errstr(nt_status)));
+ ZERO_STRUCTP(server_info);
+
return nt_status;
}
static void free_auth_context(struct auth_context **auth_context)
{
- if (*auth_context != NULL)
+ auth_methods *auth_method;
+
+ if (*auth_context) {
+ /* Free private data of context's authentication methods */
+ for (auth_method = (*auth_context)->auth_method_list; auth_method; auth_method = auth_method->next) {
+ TALLOC_FREE(auth_method->private_data);
+ }
+
talloc_destroy((*auth_context)->mem_ctx);
- *auth_context = NULL;
+ *auth_context = NULL;
+ }
}
/***************************************************************************
TALLOC_CTX *mem_ctx;
mem_ctx = talloc_init("authentication context");
-
- *auth_context = talloc(mem_ctx, sizeof(**auth_context));
+
+ *auth_context = TALLOC_P(mem_ctx, struct auth_context);
if (!*auth_context) {
DEBUG(0,("make_auth_context: talloc failed!\n"));
talloc_destroy(mem_ctx);
(*auth_context)->check_ntlm_password = check_ntlm_password;
(*auth_context)->get_ntlm_challenge = get_ntlm_challenge;
(*auth_context)->free = free_auth_context;
-
+
return NT_STATUS_OK;
}
+bool load_auth_module(struct auth_context *auth_context,
+ const char *module, auth_methods **ret)
+{
+ 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;
+
+ /* 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_char(module_params, ' ', ' ');
+ }
+
+ 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);
+ }
+ }
+
+ if (entry != NULL) {
+ if (!NT_STATUS_IS_OK(entry->init(auth_context, module_params, ret))) {
+ DEBUG(0,("load_auth_module: auth method %s did not correctly init\n",
+ module_name));
+ } else {
+ DEBUG(5,("load_auth_module: auth method %s has a valid init\n",
+ module_name));
+ good = True;
+ }
+ } else {
+ DEBUG(0,("load_auth_module: can't find auth method %s!\n", module_name));
+ }
+
+ SAFE_FREE(module_name);
+ return good;
+}
+
/***************************************************************************
Make a auth_info struct for the auth subsystem
***************************************************************************/
{
auth_methods *list = NULL;
auth_methods *t = NULL;
- auth_methods *tmp;
- int i;
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)))
return nt_status;
-
- for (;*text_list; text_list++) {
- DEBUG(5,("make_auth_context_text_list: Attempting to find an auth method to match %s\n",
- *text_list));
- for (i = 0; builtin_auth_init_functions[i].name; i++) {
- char *module_name = smb_xstrdup(*text_list);
- char *module_params = NULL;
- char *p;
-
- p = strchr(module_name, ':');
- if (p) {
- *p = 0;
- module_params = p+1;
- trim_string(module_params, " ", " ");
- }
- trim_string(module_name, " ", " ");
-
- if (strequal(builtin_auth_init_functions[i].name, module_name)) {
- DEBUG(5,("make_auth_context_text_list: Found auth method %s (at pos %d)\n", *text_list, i));
- if (NT_STATUS_IS_OK(builtin_auth_init_functions[i].init(*auth_context, module_params, &t))) {
- DEBUG(5,("make_auth_context_text_list: auth method %s has a valid init\n",
- *text_list));
- DLIST_ADD_END(list, t, tmp);
- } else {
- DEBUG(0,("make_auth_context_text_list: auth method %s did not correctly init\n",
- *text_list));
- }
- break;
- }
- SAFE_FREE(module_name);
+ for (;*text_list; text_list++) {
+ if (load_auth_module(*auth_context, *text_list, &t)) {
+ DLIST_ADD_END(list, t, auth_methods *);
}
}
-
+
(*auth_context)->auth_method_list = list;
-
+
return nt_status;
}
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 ads 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(auth_context,
+ auth_method_list);
+
+ TALLOC_FREE(auth_method_list);
return nt_status;
}
if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(auth_context))) {
return nt_status;
}
-
- (*auth_context)->challenge = data_blob(chal, 8);
+
+ (*auth_context)->challenge = data_blob_talloc((*auth_context)->mem_ctx, chal, 8);
(*auth_context)->challenge_set_by = "fixed";
return nt_status;
}
git.samba.org / ira / wip.git / blobdiff