s3-dcerpc: add server helpers for ntlmssp auth

Signed-off-by: Günther Deschner <gd@samba.org>

2 files changed, 176 insertions, 0 deletions

diff --git a/source3/rpc_server/dcesrv_ntlmssp.c b/source3/rpc_server/dcesrv_ntlmssp.c
new file mode 100644
index 0000000000..ac13607473
--- /dev/null
+++ b/source3/rpc_server/dcesrv_ntlmssp.c
@@ -0,0 +1,134 @@
+/*
+ *  NTLMSSP Acceptor
+ *  DCERPC Server functions
+ *  Copyright (C) Simo Sorce 2010.
+ *
+ *  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 "rpc_server/dcesrv_ntlmssp.h"
+#include "../libcli/auth/ntlmssp.h"
+#include "ntlmssp_wrap.h"
+
+NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
+				   bool do_sign,
+				   bool do_seal,
+				   bool is_dcerpc,
+				   DATA_BLOB *token_in,
+				   DATA_BLOB *token_out,
+				   struct auth_ntlmssp_state **ctx)
+{
+	struct auth_ntlmssp_state *a = NULL;
+	NTSTATUS status;
+
+	status = auth_ntlmssp_start(&a);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
+			  nt_errstr(status)));
+		return status;
+	}
+
+	/* Clear flags, then set them according to requested flags */
+	auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
+					NTLMSSP_NEGOTIATE_SEAL));
+
+	if (do_sign) {
+		auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN);
+	}
+	if (do_seal) {
+		/* Always implies both sign and seal for ntlmssp */
+		auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN |
+					 NTLMSSP_NEGOTIATE_SEAL);
+	}
+
+	status = auth_ntlmssp_update(a, *token_in, token_out);
+	if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+		DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
+			  nt_errstr(status)));
+		goto done;
+	}
+
+	/* Make sure data is bound to the memctx, to be freed the caller */
+	talloc_steal(mem_ctx, token_out->data);
+	/* steal ntlmssp context too */
+	*ctx = talloc_move(mem_ctx, &a);
+
+	status = NT_STATUS_OK;
+
+done:
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(a);
+	}
+
+	return status;
+}
+
+NTSTATUS ntlmssp_server_step(struct auth_ntlmssp_state *ctx,
+			     TALLOC_CTX *mem_ctx,
+			     DATA_BLOB *token_in,
+			     DATA_BLOB *token_out)
+{
+	NTSTATUS status;
+
+	/* this has to be done as root in order to verify the password */
+	become_root();
+	status = auth_ntlmssp_update(ctx, *token_in, token_out);
+	unbecome_root();
+
+	/* put the output token data on the given mem_ctx */
+	talloc_steal(mem_ctx, token_out->data);
+
+	return status;
+}
+
+NTSTATUS ntlmssp_server_check_flags(struct auth_ntlmssp_state *ctx,
+				    bool do_sign, bool do_seal)
+{
+	if (do_sign && !auth_ntlmssp_negotiated_sign(ctx)) {
+		DEBUG(1, (__location__ "Integrity was requested but client "
+			  "failed to negotiate signing.\n"));
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	if (do_seal && !auth_ntlmssp_negotiated_seal(ctx)) {
+		DEBUG(1, (__location__ "Privacy was requested but client "
+			  "failed to negotiate sealing.\n"));
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS ntlmssp_server_get_user_info(struct auth_ntlmssp_state *ctx,
+				      TALLOC_CTX *mem_ctx,
+				      struct auth_serversupplied_info **server_info)
+{
+	NTSTATUS status;
+
+	status = auth_ntlmssp_steal_server_info(mem_ctx, ctx, server_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, (__location__ ": Failed to get authenticated user "
+			  "info: %s\n", nt_errstr(status)));
+		return status;
+	}
+
+	DEBUG(5, (__location__ "OK: user: %s domain: %s workstation: %s\n",
+		  auth_ntlmssp_get_username(ctx),
+		  auth_ntlmssp_get_domain(ctx),
+		  auth_ntlmssp_get_client(ctx)));
+
+	return NT_STATUS_OK;
+}
diff --git a/source3/rpc_server/dcesrv_ntlmssp.h b/source3/rpc_server/dcesrv_ntlmssp.h
new file mode 100644
index 0000000000..ddb38f69df
--- /dev/null
+++ b/source3/rpc_server/dcesrv_ntlmssp.h
@@ -0,0 +1,42 @@
+/*
+ *  NTLMSSP Acceptor
+ *  DCERPC Server functions
+ *  Copyright (C) Simo Sorce 2010.
+ *
+ *  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/>.
+ */
+
+#ifndef _DCESRV_NTLMSSP_H_
+#define _DCESRV_NTLMSSP_H_
+
+struct auth_ntlmssp_state;
+
+NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
+				   bool do_sign,
+				   bool do_seal,
+				   bool is_dcerpc,
+				   DATA_BLOB *token_in,
+				   DATA_BLOB *token_out,
+				   struct auth_ntlmssp_state **ctx);
+NTSTATUS ntlmssp_server_step(struct auth_ntlmssp_state *ctx,
+			     TALLOC_CTX *mem_ctx,
+			     DATA_BLOB *token_in,
+			     DATA_BLOB *token_out);
+NTSTATUS ntlmssp_server_check_flags(struct auth_ntlmssp_state *ctx,
+				    bool do_sign, bool do_seal);
+NTSTATUS ntlmssp_server_get_user_info(struct auth_ntlmssp_state *ctx,
+				      TALLOC_CTX *mem_ctx,
+				      struct auth_serversupplied_info **server_info);
+
+#endif /* _DCESRV_NTLMSSP_H_ */