#include "includes.h"
#include "source3/include/auth.h"
+#include "source3/include/messages.h"
#include "source4/auth/auth.h"
#include "auth/auth_sam_reply.h"
#include "param/param.h"
#include "source4/lib/events/events.h"
#include "source4/lib/messaging/messaging.h"
#include "auth/gensec/gensec.h"
-#include "source4/auth/credentials/credentials.h"
+#include "auth/credentials/credentials.h"
+#include "lib/global_contexts.h"
+#include "lib/util/idtree.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
-static NTSTATUS check_samba4_security(const struct auth_context *auth_context,
- void *my_private_data,
+static NTSTATUS make_auth4_context_s4(const struct auth_context *auth_context,
TALLOC_CTX *mem_ctx,
- const struct auth_usersupplied_info *user_info,
- struct auth_serversupplied_info **server_info)
+ struct auth4_context **auth4_context);
+
+static struct idr_context *task_id_tree;
+
+static int free_task_id(struct server_id *server_id)
+{
+ idr_remove(task_id_tree, server_id->task_id);
+ return 0;
+}
+
+/* Return a server_id with a unique task_id element. Free the
+ * returned pointer to de-allocate the task_id via a talloc destructor
+ * (ie, use talloc_free()) */
+static struct server_id *new_server_id_task(TALLOC_CTX *mem_ctx)
+{
+ struct messaging_context *msg_ctx;
+ struct server_id *server_id;
+ int task_id;
+ if (!task_id_tree) {
+ task_id_tree = idr_init(NULL);
+ if (!task_id_tree) {
+ return NULL;
+ }
+ }
+
+ msg_ctx = global_messaging_context();
+ if (msg_ctx == NULL) {
+ return NULL;
+ }
+
+ server_id = talloc(mem_ctx, struct server_id);
+
+ if (!server_id) {
+ return NULL;
+ }
+ *server_id = messaging_server_id(msg_ctx);
+
+ /* 0 is the default server_id, so we need to start with 1 */
+ task_id = idr_get_new_above(task_id_tree, server_id, 1, INT32_MAX);
+
+ if (task_id == -1) {
+ talloc_free(server_id);
+ return NULL;
+ }
+
+ talloc_set_destructor(server_id, free_task_id);
+ server_id->task_id = task_id;
+ return server_id;
+}
+
+/*
+ * This module is not an ordinary authentication module. It is really
+ * a way to redirect the whole authentication and authorization stack
+ * to use the source4 auth code, not a way to just handle NTLM
+ * authentication.
+ *
+ * See the comments above each function for how that hook changes the
+ * behaviour.
+ */
+
+/*
+ * This hook is currently used by winbindd only, as all other NTLM
+ * logins go via the hooks provided by make_auth4_context_s4() below.
+ *
+ * This is only left in case we find a way that it might become useful
+ * in future. Importantly, this routine returns the information
+ * needed for a NETLOGON SamLogon, not what is needed to establish a
+ * session.
+ *
+ * We expect we may use this hook in the source3/ winbind when this
+ * services the AD DC. It is tested via pdbtest.
+ */
+
+static NTSTATUS check_samba4_security(
+ const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const struct auth_usersupplied_info *user_info,
+ struct auth_serversupplied_info **pserver_info)
{
TALLOC_CTX *frame = talloc_stackframe();
struct netr_SamInfo3 *info3 = NULL;
NTSTATUS nt_status;
struct auth_user_info_dc *user_info_dc;
struct auth4_context *auth4_context;
- struct loadparm_context *lp_ctx;
+ uint8_t authoritative = 1;
+ struct auth_serversupplied_info *server_info = NULL;
- lp_ctx = loadparm_init_s3(frame, loadparm_s3_context());
- if (lp_ctx == NULL) {
- DEBUG(10, ("loadparm_init_s3 failed\n"));
- talloc_free(frame);
- return NT_STATUS_INVALID_SERVER_STATE;
+ nt_status = make_auth4_context_s4(auth_context, mem_ctx, &auth4_context);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ TALLOC_FREE(frame);
+ goto done;
}
-
- /* We create a private tevent context here to avoid nested loops in
- * the s3 one, as that may not be expected */
- nt_status = auth_context_create(mem_ctx,
- s4_event_context_init(frame), NULL,
- lp_ctx,
- &auth4_context);
- NT_STATUS_NOT_OK_RETURN(nt_status);
nt_status = auth_context_set_challenge(auth4_context, auth_context->challenge.data, "auth_samba4");
- NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ TALLOC_FREE(auth4_context);
+ TALLOC_FREE(frame);
+ return nt_status;
+ }
+
+ nt_status = auth_check_password(auth4_context, auth4_context, user_info,
+ &user_info_dc, &authoritative);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) &&
+ authoritative == 0)
+ {
+ nt_status = NT_STATUS_NOT_IMPLEMENTED;
+ }
+ TALLOC_FREE(auth4_context);
+ TALLOC_FREE(frame);
+ return nt_status;
+ }
- nt_status = auth_check_password(auth4_context, auth4_context, user_info, &user_info_dc);
- NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
-
nt_status = auth_convert_user_info_dc_saminfo3(mem_ctx,
user_info_dc,
+ AUTH_INCLUDE_RESOURCE_GROUPS,
&info3);
if (NT_STATUS_IS_OK(nt_status)) {
/* We need the strings from the server_info to be valid as long as the info3 is around */
goto done;
}
- nt_status = make_server_info_info3(mem_ctx, user_info->client.account_name,
- user_info->mapped.domain_name, server_info,
- info3);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(10, ("make_server_info_info3 failed: %s\n",
- nt_errstr(nt_status)));
- TALLOC_FREE(frame);
- return nt_status;
+ if (user_info->flags & USER_INFO_INFO3_AND_NO_AUTHZ) {
+ server_info = make_server_info(mem_ctx);
+ if (server_info == NULL) {
+ nt_status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ server_info->info3 = talloc_move(server_info, &info3);
+ } else {
+ nt_status = make_server_info_info3(
+ mem_ctx,
+ user_info->client.account_name,
+ user_info->mapped.domain_name,
+ &server_info,
+ info3);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(10, ("make_server_info_info3 failed: %s\n",
+ nt_errstr(nt_status)));
+ goto done;
+ }
}
+ *pserver_info = server_info;
nt_status = NT_STATUS_OK;
done:
return nt_status;
}
-/* Hook to allow GENSEC to handle blob-based authentication
- * mechanisms, without directly linking the mechansim code */
-static NTSTATUS prepare_gensec(TALLOC_CTX *mem_ctx,
+/*
+ * Hook to allow the source4 set of GENSEC modules to handle
+ * blob-based authentication mechanisms, without directly linking the
+ * mechanism code.
+ *
+ * This may eventually go away, when the GSSAPI acceptors are merged,
+ * when we will just rely on the make_auth4_context_s4 hook instead.
+ *
+ * Even for NTLMSSP, which has a common module, significant parts of
+ * the behaviour are overridden here, because it uses the source4 NTLM
+ * stack and the source4 mapping between the PAC/SamLogon response and
+ * the local token.
+ *
+ * It is important to override all this to ensure that the exact same
+ * token is generated and used in the SMB and LDAP servers, for NTLM
+ * and for Kerberos.
+ */
+static NTSTATUS prepare_gensec(const struct auth_context *auth_context,
+ TALLOC_CTX *mem_ctx,
struct gensec_security **gensec_context)
{
NTSTATUS status;
TALLOC_CTX *frame = talloc_stackframe();
struct gensec_security *gensec_ctx;
struct imessaging_context *msg_ctx;
- struct server_id *server_id;
struct cli_credentials *server_credentials;
+ struct server_id *server_id;
- lp_ctx = loadparm_init_s3(frame, loadparm_s3_context());
+ lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
if (lp_ctx == NULL) {
DEBUG(1, ("loadparm_init_s3 failed\n"));
TALLOC_FREE(frame);
return NT_STATUS_INVALID_SERVER_STATE;
}
- event_ctx = s4_event_context_init(mem_ctx);
+ event_ctx = s4_event_context_init(frame);
if (event_ctx == NULL) {
DEBUG(1, ("s4_event_context_init failed\n"));
TALLOC_FREE(frame);
return NT_STATUS_INVALID_SERVER_STATE;
}
- msg_ctx = imessaging_client_init(frame,
- lpcfg_imessaging_path(frame, lp_ctx),
- event_ctx);
+ server_id = new_server_id_task(frame);
+ if (server_id == NULL) {
+ DEBUG(1, ("new_server_id_task failed\n"));
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+
+ msg_ctx = imessaging_init_discard_incoming(frame,
+ lp_ctx,
+ *server_id,
+ event_ctx);
if (msg_ctx == NULL) {
- DEBUG(1, ("imessaging_init failed\n"));
+ DEBUG(1, ("imessaging_init_discard_incoming failed\n"));
TALLOC_FREE(frame);
return NT_STATUS_INVALID_SERVER_STATE;
}
+ talloc_reparent(frame, msg_ctx, server_id);
+
server_credentials
- = cli_credentials_init(frame);
+ = cli_credentials_init_server(frame, lp_ctx);
if (!server_credentials) {
DEBUG(1, ("Failed to init server credentials"));
TALLOC_FREE(frame);
return NT_STATUS_INVALID_SERVER_STATE;
}
- cli_credentials_set_conf(server_credentials, lp_ctx);
- status = cli_credentials_set_machine_account(server_credentials, lp_ctx);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
- talloc_free(server_credentials);
- server_credentials = NULL;
- }
-
status = samba_server_gensec_start(mem_ctx,
event_ctx, msg_ctx,
lp_ctx, server_credentials, "cifs",
return status;
}
+/*
+ * Hook to allow handling of NTLM authentication for AD operation
+ * without directly linking the s4 auth stack
+ *
+ * This ensures we use the source4 authentication stack, as well as
+ * the authorization stack to create the user's token. This ensures
+ * consistency between NTLM logins and NTLMSSP logins, as NTLMSSP is
+ * handled by the hook above.
+ */
+static NTSTATUS make_auth4_context_s4(const struct auth_context *auth_context,
+ TALLOC_CTX *mem_ctx,
+ struct auth4_context **auth4_context)
+{
+ NTSTATUS status;
+ struct loadparm_context *lp_ctx;
+ struct tevent_context *event_ctx;
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct imessaging_context *msg_ctx;
+ struct server_id *server_id;
+
+ lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
+ if (lp_ctx == NULL) {
+ DEBUG(1, ("loadparm_init_s3 failed\n"));
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+ event_ctx = s4_event_context_init(frame);
+ if (event_ctx == NULL) {
+ DEBUG(1, ("s4_event_context_init failed\n"));
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+
+ server_id = new_server_id_task(frame);
+ if (server_id == NULL) {
+ DEBUG(1, ("new_server_id_task failed\n"));
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+
+ msg_ctx = imessaging_init_discard_incoming(frame,
+ lp_ctx,
+ *server_id,
+ event_ctx);
+ if (msg_ctx == NULL) {
+ DEBUG(1, ("imessaging_init_discard_incoming failed\n"));
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+ talloc_reparent(frame, msg_ctx, server_id);
+
+ /* Allow forcing a specific auth4 module */
+ if (!auth_context->forced_samba4_methods) {
+ status = auth_context_create(mem_ctx,
+ event_ctx,
+ msg_ctx,
+ lp_ctx,
+ auth4_context);
+ } else {
+ const char * const *forced_auth_methods = (const char * const *)str_list_make(mem_ctx, auth_context->forced_samba4_methods, NULL);
+ status = auth_context_create_methods(mem_ctx, forced_auth_methods, event_ctx, msg_ctx, lp_ctx, NULL, auth4_context);
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to start auth server code: %s\n", nt_errstr(status)));
+ TALLOC_FREE(frame);
+ return status;
+ }
+
+ talloc_reparent(frame, *auth4_context, msg_ctx);
+ talloc_reparent(frame, *auth4_context, event_ctx);
+ talloc_reparent(frame, *auth4_context, lp_ctx);
+
+ TALLOC_FREE(frame);
+ return status;
+}
+
/* module initialisation */
static NTSTATUS auth_init_samba4(struct auth_context *auth_context,
- const char *param,
- auth_methods **auth_method)
+ const char *param,
+ struct auth_methods **auth_method)
{
struct auth_methods *result;
result->name = "samba4";
result->auth = check_samba4_security;
result->prepare_gensec = prepare_gensec;
- result->gensec_start_mech_by_oid = gensec_start_mech_by_oid;
- result->gensec_start_mech_by_authtype = gensec_start_mech_by_authtype;
+ result->make_auth4_context = make_auth4_context_s4;
+
+ if (param && *param) {
+ auth_context->forced_samba4_methods = talloc_strdup(result, param);
+ if (!auth_context->forced_samba4_methods) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
*auth_method = result;
return NT_STATUS_OK;
}
-NTSTATUS auth_samba4_init(void)
+NTSTATUS auth_samba4_init(TALLOC_CTX *mem_ctx);
+NTSTATUS auth_samba4_init(TALLOC_CTX *mem_ctx)
{
smb_register_auth(AUTH_INTERFACE_VERSION, "samba4",
auth_init_samba4);
git.samba.org / samba.git / blobdiff