/*
Unix SMB/CIFS implementation.
- dcerpc authentication operations
+ Generic Authentication Interface
Copyright (C) Andrew Tridgell 2003
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
+ Copyright (C) Stefan Metzmacher 2004
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,
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 "libcli/composite/composite.h"
+#include "auth/gensec/gensec.h"
+#include "librpc/rpc/dcerpc.h"
/*
- do a simple ntlm style authentication on a dcerpc pipe
+ return the rpc syntax and transfer syntax given the pipe uuid and version
*/
-NTSTATUS dcerpc_bind_auth_ntlm(struct dcerpc_pipe *p,
- const char *uuid, unsigned version,
- const char *domain,
- const char *username,
- const char *password)
+static NTSTATUS dcerpc_init_syntaxes(const struct dcerpc_interface_table *table,
+ struct dcerpc_syntax_id *syntax,
+ struct dcerpc_syntax_id *transfer_syntax)
{
- NTSTATUS status;
- struct ntlmssp_state *state;
- TALLOC_CTX *mem_ctx;
- DATA_BLOB credentials;
+ syntax->uuid = table->syntax_id.uuid;
+ syntax->if_version = table->syntax_id.if_version;
- mem_ctx = talloc_init("dcerpc_bind_auth_ntlm");
- if (!mem_ctx) {
- return NT_STATUS_NO_MEMORY;
- }
+ *transfer_syntax = ndr_transfer_syntax;
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ Send request to do a non-authenticated dcerpc bind
+*/
+struct composite_context *dcerpc_bind_auth_none_send(TALLOC_CTX *mem_ctx,
+ struct dcerpc_pipe *p,
+ const struct dcerpc_interface_table *table)
+{
+ struct dcerpc_syntax_id syntax;
+ struct dcerpc_syntax_id transfer_syntax;
+
+ struct composite_context *c;
+
+ c = composite_create(mem_ctx, p->conn->event_ctx);
+ if (c == NULL) return NULL;
- status = ntlmssp_client_start(&state);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+ c->status = dcerpc_init_syntaxes(table,
+ &syntax, &transfer_syntax);
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(2,("Invalid uuid string in "
+ "dcerpc_bind_auth_none_send\n"));
+ composite_error(c, c->status);
+ return c;
}
- status = ntlmssp_set_domain(state, domain);
- if (!NT_STATUS_IS_OK(status)) {
- goto done;
+ /* c was only allocated as a container for a possible error */
+ talloc_free(c);
+
+ return dcerpc_bind_send(p, mem_ctx, &syntax, &transfer_syntax);
+}
+
+
+/*
+ Receive result of a non-authenticated dcerpc bind
+*/
+NTSTATUS dcerpc_bind_auth_none_recv(struct composite_context *ctx)
+{
+ return dcerpc_bind_recv(ctx);
+}
+
+
+/*
+ Perform sync non-authenticated dcerpc bind
+*/
+NTSTATUS dcerpc_bind_auth_none(struct dcerpc_pipe *p,
+ const struct dcerpc_interface_table *table)
+{
+ struct composite_context *ctx;
+
+ ctx = dcerpc_bind_auth_none_send(p, p, table);
+ return dcerpc_bind_auth_none_recv(ctx);
+}
+
+
+struct bind_auth_state {
+ struct dcerpc_pipe *pipe;
+ DATA_BLOB credentials;
+ BOOL more_processing; /* Is there anything more to do after the
+ * first bind itself received? */
+};
+
+static void bind_auth_recv_alter(struct composite_context *creq);
+
+static void bind_auth_next_step(struct composite_context *c)
+{
+ struct bind_auth_state *state;
+ struct dcerpc_security *sec;
+ struct composite_context *creq;
+ BOOL more_processing = False;
+
+ state = talloc_get_type(c->private_data, struct bind_auth_state);
+ sec = &state->pipe->conn->security_state;
+
+ /* The status value here, from GENSEC is vital to the security
+ * of the system. Even if the other end accepts, if GENSEC
+ * claims 'MORE_PROCESSING_REQUIRED' then you must keep
+ * feeding it blobs, or else the remote host/attacker might
+ * avoid mutal authentication requirements.
+ *
+ * Likewise, you must not feed GENSEC too much (after the OK),
+ * it doesn't like that either
+ */
+
+ c->status = gensec_update(sec->generic_state, state,
+ sec->auth_info->credentials,
+ &state->credentials);
+
+ if (NT_STATUS_EQUAL(c->status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ more_processing = True;
+ c->status = NT_STATUS_OK;
}
-
- status = ntlmssp_set_username(state, username);
- if (!NT_STATUS_IS_OK(status)) {
- goto done;
+
+ if (!composite_is_ok(c)) return;
+
+ if (state->credentials.length == 0) {
+ composite_done(c);
+ return;
}
- status = ntlmssp_set_password(state, password);
- if (!NT_STATUS_IS_OK(status)) {
- goto done;
+ sec->auth_info->credentials = state->credentials;
+
+ if (!more_processing) {
+ /* NO reply expected, so just send it */
+ c->status = dcerpc_auth3(state->pipe->conn, state);
+ if (!composite_is_ok(c)) return;
+
+ composite_done(c);
+ return;
}
- p->auth_info = talloc(p->mem_ctx, sizeof(*p->auth_info));
- if (!p->auth_info) {
- status = NT_STATUS_NO_MEMORY;
- goto done;
+ /* We are demanding a reply, so use a request that will get us one */
+
+ creq = dcerpc_alter_context_send(state->pipe, state,
+ &state->pipe->syntax,
+ &state->pipe->transfer_syntax);
+ if (composite_nomem(creq, c)) return;
+
+ composite_continue(c, creq, bind_auth_recv_alter, c);
+}
+
+
+static void bind_auth_recv_alter(struct composite_context *creq)
+{
+ struct composite_context *c = talloc_get_type(creq->async.private_data,
+ struct composite_context);
+
+ c->status = dcerpc_alter_context_recv(creq);
+ if (!composite_is_ok(c)) return;
+
+ bind_auth_next_step(c);
+}
+
+
+static void bind_auth_recv_bindreply(struct composite_context *creq)
+{
+ struct composite_context *c = talloc_get_type(creq->async.private_data,
+ struct composite_context);
+ struct bind_auth_state *state = talloc_get_type(c->private_data,
+ struct bind_auth_state);
+
+ c->status = dcerpc_bind_recv(creq);
+ if (!composite_is_ok(c)) return;
+
+ if (!state->more_processing) {
+ /* The first gensec_update has not requested a second run, so
+ * we're done here. */
+ composite_done(c);
+ return;
}
- p->auth_info->auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
- p->auth_info->auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
- p->auth_info->auth_pad_length = 0;
- p->auth_info->auth_reserved = 0;
- p->auth_info->auth_context_id = random();
- p->auth_info->credentials = data_blob(NULL, 0);
- p->ntlmssp_state = NULL;
-
- status = ntlmssp_update(state,
- p->auth_info->credentials,
- &credentials);
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- goto done;
+ bind_auth_next_step(c);
+}
+
+
+/**
+ Bind to a DCE/RPC pipe, send async request
+ @param mem_ctx TALLOC_CTX for the allocation of the composite_context
+ @param p The dcerpc_pipe to bind (must already be connected)
+ @param table The interface table to use (the DCE/RPC bind both selects and interface and authenticates)
+ @param credentials The credentials of the account to connect with
+ @param auth_type Select the authentication scheme to use
+ @param auth_level Chooses between unprotected (connect), signed or sealed
+ @param service The service (used by Kerberos to select the service principal to contact)
+ @retval A composite context describing the partial state of the bind
+*/
+
+struct composite_context *dcerpc_bind_auth_send(TALLOC_CTX *mem_ctx,
+ struct dcerpc_pipe *p,
+ const struct dcerpc_interface_table *table,
+ struct cli_credentials *credentials,
+ uint8_t auth_type, uint8_t auth_level,
+ const char *service)
+{
+ struct composite_context *c, *creq;
+ struct bind_auth_state *state;
+ struct dcerpc_security *sec;
+
+ struct dcerpc_syntax_id syntax, transfer_syntax;
+
+ /* composite context allocation and setup */
+ c = composite_create(mem_ctx, p->conn->event_ctx);
+ if (c == NULL) return NULL;
+
+ state = talloc(c, struct bind_auth_state);
+ if (composite_nomem(state, c)) return c;
+ c->private_data = state;
+
+ state->pipe = p;
+
+ c->status = dcerpc_init_syntaxes(table,
+ &syntax,
+ &transfer_syntax);
+ if (!composite_is_ok(c)) return c;
+
+ sec = &p->conn->security_state;
+
+ c->status = gensec_client_start(p, &sec->generic_state,
+ p->conn->event_ctx);
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(1, ("Failed to start GENSEC client mode: %s\n",
+ nt_errstr(c->status)));
+ composite_error(c, c->status);
+ return c;
}
- p->auth_info->credentials = data_blob_talloc(mem_ctx,
- credentials.data,
- credentials.length);
- data_blob_free(&credentials);
+ c->status = gensec_set_credentials(sec->generic_state, credentials);
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(1, ("Failed to set GENSEC client credentails: %s\n",
+ nt_errstr(c->status)));
+ composite_error(c, c->status);
+ return c;
+ }
- status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
- if (!NT_STATUS_IS_OK(status)) {
- goto done;
+ c->status = gensec_set_target_hostname(sec->generic_state,
+ p->conn->transport.target_hostname(p->conn));
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(1, ("Failed to set GENSEC target hostname: %s\n",
+ nt_errstr(c->status)));
+ composite_error(c, c->status);
+ return c;
}
+ if (service != NULL) {
+ c->status = gensec_set_target_service(sec->generic_state,
+ service);
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(1, ("Failed to set GENSEC target service: %s\n",
+ nt_errstr(c->status)));
+ composite_error(c, c->status);
+ return c;
+ }
+ }
- status = ntlmssp_update(state,
- p->auth_info->credentials,
- &credentials);
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- goto done;
+ c->status = gensec_start_mech_by_authtype(sec->generic_state,
+ auth_type, auth_level);
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(1, ("Failed to start GENSEC client mechanism %s: %s\n",
+ gensec_get_name_by_authtype(auth_type),
+ nt_errstr(c->status)));
+ composite_error(c, c->status);
+ return c;
}
- p->auth_info->credentials = data_blob_talloc(mem_ctx,
- credentials.data,
- credentials.length);
- data_blob_free(&credentials);
+ sec->auth_info = talloc(p, struct dcerpc_auth);
+ if (composite_nomem(sec->auth_info, c)) return c;
+
+ sec->auth_info->auth_type = auth_type;
+ sec->auth_info->auth_level = auth_level,
+ sec->auth_info->auth_pad_length = 0;
+ sec->auth_info->auth_reserved = 0;
+ sec->auth_info->auth_context_id = random();
+ sec->auth_info->credentials = data_blob(NULL, 0);
- status = dcerpc_auth3(p, mem_ctx);
+ /* The status value here, from GENSEC is vital to the security
+ * of the system. Even if the other end accepts, if GENSEC
+ * claims 'MORE_PROCESSING_REQUIRED' then you must keep
+ * feeding it blobs, or else the remote host/attacker might
+ * avoid mutal authentication requirements.
+ *
+ * Likewise, you must not feed GENSEC too much (after the OK),
+ * it doesn't like that either
+ */
- if (!NT_STATUS_IS_OK(status)) {
- goto done;
+ c->status = gensec_update(sec->generic_state, state,
+ sec->auth_info->credentials,
+ &state->credentials);
+ if (!NT_STATUS_IS_OK(c->status) &&
+ !NT_STATUS_EQUAL(c->status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ composite_error(c, c->status);
+ return c;
}
- p->ntlmssp_state = state;
+ state->more_processing = NT_STATUS_EQUAL(c->status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED);
- /* setup for signing */
- status = ntlmssp_sign_init(state);
+ if (state->credentials.length == 0) {
+ composite_done(c);
+ return c;
+ }
-done:
- talloc_destroy(mem_ctx);
+ sec->auth_info->credentials = state->credentials;
- if (!NT_STATUS_IS_OK(status)) {
- p->ntlmssp_state = NULL;
- }
+ /* The first request always is a dcerpc_bind. The subsequent ones
+ * depend on gensec results */
+ creq = dcerpc_bind_send(p, state, &syntax, &transfer_syntax);
+ if (composite_nomem(creq, c)) return c;
- return status;
+ composite_continue(c, creq, bind_auth_recv_bindreply, c);
+ return c;
}
-/*
- do a non-athenticated dcerpc bind
+/**
+ Bind to a DCE/RPC pipe, receive result
+ @param creq A composite context describing state of async call
+ @retval NTSTATUS code
*/
-NTSTATUS dcerpc_bind_auth_none(struct dcerpc_pipe *p,
- const char *uuid, unsigned version)
+
+NTSTATUS dcerpc_bind_auth_recv(struct composite_context *creq)
{
- TALLOC_CTX *mem_ctx;
- NTSTATUS status;
+ NTSTATUS result = composite_wait(creq);
+ struct bind_auth_state *state = talloc_get_type(creq->private_data,
+ struct bind_auth_state);
- mem_ctx = talloc_init("dcerpc_bind_auth_ntlm");
- if (!mem_ctx) {
- return NT_STATUS_NO_MEMORY;
+ if (NT_STATUS_IS_OK(result)) {
+ /*
+ after a successful authenticated bind the session
+ key reverts to the generic session key
+ */
+ state->pipe->conn->security_state.session_key = dcerpc_generic_session_key;
}
+
+ talloc_free(creq);
+ return result;
+}
- status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
- talloc_destroy(mem_ctx);
- return status;
+/**
+ Perform a GENSEC authenticated bind to a DCE/RPC pipe, sync
+ @param p The dcerpc_pipe to bind (must already be connected)
+ @param table The interface table to use (the DCE/RPC bind both selects and interface and authenticates)
+ @param credentials The credentials of the account to connect with
+ @param auth_type Select the authentication scheme to use
+ @param auth_level Chooses between unprotected (connect), signed or sealed
+ @param service The service (used by Kerberos to select the service principal to contact)
+ @retval NTSTATUS status code
+*/
+
+NTSTATUS dcerpc_bind_auth(struct dcerpc_pipe *p,
+ const struct dcerpc_interface_table *table,
+ struct cli_credentials *credentials,
+ uint8_t auth_type, uint8_t auth_level,
+ const char *service)
+{
+ struct composite_context *creq;
+ creq = dcerpc_bind_auth_send(p, p, table, credentials,
+ auth_type, auth_level, service);
+ return dcerpc_bind_auth_recv(creq);
}
git.samba.org / amitay / samba.git / blobdiff