s3: separate out cli schannel functions that depend on cli_netlogon.

Guenther

1 files changed, 228 insertions, 0 deletions

diff --git a/source3/rpc_client/cli_pipe_schannel.c b/source3/rpc_client/cli_pipe_schannel.c
new file mode 100644
index 0000000000..7bc8d80ec9
--- /dev/null
+++ b/source3/rpc_client/cli_pipe_schannel.c
@@ -0,0 +1,228 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  RPC Pipe client / server routines
+ *  Largely rewritten by Jeremy Allison		    2005.
+ *
+ *  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 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "includes.h"
+#include "../librpc/gen_ndr/ndr_schannel.h"
+#include "../librpc/gen_ndr/ndr_netlogon.h"
+#include "../libcli/auth/schannel.h"
+#include "rpc_client/cli_netlogon.h"
+#include "librpc/gen_ndr/ndr_dcerpc.h"
+#include "librpc/rpc/dcerpc.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_RPC_CLI
+
+
+/****************************************************************************
+  Get a the schannel session key out of an already opened netlogon pipe.
+ ****************************************************************************/
+static NTSTATUS get_schannel_session_key_common(struct rpc_pipe_client *netlogon_pipe,
+						struct cli_state *cli,
+						const char *domain,
+						uint32 *pneg_flags)
+{
+	enum netr_SchannelType sec_chan_type = 0;
+	unsigned char machine_pwd[16];
+	const char *machine_account;
+	NTSTATUS status;
+
+	/* Get the machine account credentials from secrets.tdb. */
+	if (!get_trust_pw_hash(domain, machine_pwd, &machine_account,
+			       &sec_chan_type))
+	{
+		DEBUG(0, ("get_schannel_session_key: could not fetch "
+			"trust account password for domain '%s'\n",
+			domain));
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	}
+
+	status = rpccli_netlogon_setup_creds(netlogon_pipe,
+					cli->desthost, /* server name */
+					domain,	       /* domain */
+					global_myname(), /* client name */
+					machine_account, /* machine account name */
+					machine_pwd,
+					sec_chan_type,
+					pneg_flags);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(3, ("get_schannel_session_key_common: "
+			  "rpccli_netlogon_setup_creds failed with result %s "
+			  "to server %s, domain %s, machine account %s.\n",
+			  nt_errstr(status), cli->desthost, domain,
+			  machine_account ));
+		return status;
+	}
+
+	if (((*pneg_flags) & NETLOGON_NEG_SCHANNEL) == 0) {
+		DEBUG(3, ("get_schannel_session_key: Server %s did not offer schannel\n",
+			cli->desthost));
+		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+	}
+
+	return NT_STATUS_OK;;
+}
+
+/****************************************************************************
+ Open a named pipe to an SMB server and bind using schannel (bind type 68).
+ Fetch the session key ourselves using a temporary netlogon pipe. This
+ version uses an ntlmssp auth bound netlogon pipe to get the key.
+ ****************************************************************************/
+
+static NTSTATUS get_schannel_session_key_auth_ntlmssp(struct cli_state *cli,
+						      const char *domain,
+						      const char *username,
+						      const char *password,
+						      uint32 *pneg_flags,
+						      struct rpc_pipe_client **presult)
+{
+	struct rpc_pipe_client *netlogon_pipe = NULL;
+	NTSTATUS status;
+
+	status = cli_rpc_pipe_open_spnego_ntlmssp(
+		cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
+		DCERPC_AUTH_LEVEL_PRIVACY,
+		domain, username, password, &netlogon_pipe);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
+						 pneg_flags);
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(netlogon_pipe);
+		return status;
+	}
+
+	*presult = netlogon_pipe;
+	return NT_STATUS_OK;
+}
+
+/****************************************************************************
+ Open a named pipe to an SMB server and bind using schannel (bind type 68).
+ Fetch the session key ourselves using a temporary netlogon pipe. This version
+ uses an ntlmssp bind to get the session key.
+ ****************************************************************************/
+
+NTSTATUS cli_rpc_pipe_open_ntlmssp_auth_schannel(struct cli_state *cli,
+						 const struct ndr_syntax_id *interface,
+						 enum dcerpc_transport_t transport,
+						 enum dcerpc_AuthLevel auth_level,
+						 const char *domain,
+						 const char *username,
+						 const char *password,
+						 struct rpc_pipe_client **presult)
+{
+	uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+	struct rpc_pipe_client *netlogon_pipe = NULL;
+	struct rpc_pipe_client *result = NULL;
+	NTSTATUS status;
+
+	status = get_schannel_session_key_auth_ntlmssp(
+		cli, domain, username, password, &neg_flags, &netlogon_pipe);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("cli_rpc_pipe_open_ntlmssp_auth_schannel: failed to get schannel session "
+			"key from server %s for domain %s.\n",
+			cli->desthost, domain ));
+		return status;
+	}
+
+	status = cli_rpc_pipe_open_schannel_with_key(
+		cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
+		&result);
+
+	/* Now we've bound using the session key we can close the netlog pipe. */
+	TALLOC_FREE(netlogon_pipe);
+
+	if (NT_STATUS_IS_OK(status)) {
+		*presult = result;
+	}
+	return status;
+}
+
+/****************************************************************************
+ Open a named pipe to an SMB server and bind using schannel (bind type 68).
+ Fetch the session key ourselves using a temporary netlogon pipe.
+ ****************************************************************************/
+
+NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
+				    const struct ndr_syntax_id *interface,
+				    enum dcerpc_transport_t transport,
+				    enum dcerpc_AuthLevel auth_level,
+				    const char *domain,
+				    struct rpc_pipe_client **presult)
+{
+	uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+	struct rpc_pipe_client *netlogon_pipe = NULL;
+	struct rpc_pipe_client *result = NULL;
+	NTSTATUS status;
+
+	status = get_schannel_session_key(cli, domain, &neg_flags,
+					  &netlogon_pipe);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("cli_rpc_pipe_open_schannel: failed to get schannel session "
+			"key from server %s for domain %s.\n",
+			cli->desthost, domain ));
+		return status;
+	}
+
+	status = cli_rpc_pipe_open_schannel_with_key(
+		cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
+		&result);
+
+	/* Now we've bound using the session key we can close the netlog pipe. */
+	TALLOC_FREE(netlogon_pipe);
+
+	if (NT_STATUS_IS_OK(status)) {
+		*presult = result;
+	}
+
+	return status;
+}
+
+/****************************************************************************
+ Open a netlogon pipe and get the schannel session key.
+ Now exposed to external callers.
+ ****************************************************************************/
+
+
+NTSTATUS get_schannel_session_key(struct cli_state *cli,
+				  const char *domain,
+				  uint32 *pneg_flags,
+				  struct rpc_pipe_client **presult)
+{
+	struct rpc_pipe_client *netlogon_pipe = NULL;
+	NTSTATUS status;
+
+	status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
+					  &netlogon_pipe);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
+						 pneg_flags);
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(netlogon_pipe);
+		return status;
+	}
+
+	*presult = netlogon_pipe;
+	return NT_STATUS_OK;
+}