auth: Move the rest of the source4 gensec_ntlmssp code to the top level

The ntlmssp_server code will be in common shortly, and aside from a
symbol name or two, moving the client code causes no harm and makes
less mess.  We will also get the client code in common very soon.

Andrew Bartlett

Signed-off-by: Stefan Metzmacher <metze@samba.org>

1 files changed, 211 insertions, 0 deletions

diff --git a/auth/ntlmssp/ntlmssp.c b/auth/ntlmssp/ntlmssp.c
new file mode 100644
index 00000000000..720a815449f
--- /dev/null
+++ b/auth/ntlmssp/ntlmssp.c
@@ -0,0 +1,211 @@
+/*
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   handle NLTMSSP, client server side parsing
+
+   Copyright (C) Andrew Tridgell      2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+   Copyright (C) Stefan Metzmacher 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/>.
+*/
+
+struct auth_session_info;
+
+#include "includes.h"
+#include "auth/ntlmssp/ntlmssp.h"
+#include "auth/ntlmssp/ntlmssp_private.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "librpc/gen_ndr/ndr_dcerpc.h"
+#include "auth/gensec/gensec.h"
+
+/**
+ * Callbacks for NTLMSSP - for both client and server operating modes
+ *
+ */
+
+static const struct ntlmssp_callbacks {
+	enum ntlmssp_role role;
+	enum ntlmssp_message_type command;
+	NTSTATUS (*sync_fn)(struct gensec_security *gensec_security,
+			    TALLOC_CTX *out_mem_ctx,
+			    DATA_BLOB in, DATA_BLOB *out);
+} ntlmssp_callbacks[] = {
+	{
+		.role		= NTLMSSP_CLIENT,
+		.command	= NTLMSSP_INITIAL,
+		.sync_fn	= ntlmssp_client_initial,
+	},{
+		.role		= NTLMSSP_SERVER,
+		.command	= NTLMSSP_NEGOTIATE,
+		.sync_fn	= gensec_ntlmssp_server_negotiate,
+	},{
+		.role		= NTLMSSP_CLIENT,
+		.command	= NTLMSSP_CHALLENGE,
+		.sync_fn	= ntlmssp_client_challenge,
+	},{
+		.role		= NTLMSSP_SERVER,
+		.command	= NTLMSSP_AUTH,
+		.sync_fn	= gensec_ntlmssp_server_auth,
+	}
+};
+
+
+static NTSTATUS gensec_ntlmssp_update_find(struct ntlmssp_state *ntlmssp_state,
+					   const DATA_BLOB input, uint32_t *idx)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(ntlmssp_state->callback_private,
+				      struct gensec_ntlmssp_context);
+	struct gensec_security *gensec_security = gensec_ntlmssp->gensec_security;
+	uint32_t ntlmssp_command;
+	uint32_t i;
+
+	if (ntlmssp_state->expected_state == NTLMSSP_DONE) {
+		/* We are strict here because other modules, which we
+		 * don't fully control (such as GSSAPI) are also
+		 * strict, but are tested less often */
+
+		DEBUG(1, ("Called NTLMSSP after state machine was 'done'\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (!input.length) {
+		switch (ntlmssp_state->role) {
+		case NTLMSSP_CLIENT:
+			ntlmssp_command = NTLMSSP_INITIAL;
+			break;
+		case NTLMSSP_SERVER:
+			if (gensec_security->want_features & GENSEC_FEATURE_DATAGRAM_MODE) {
+				/* 'datagram' mode - no neg packet */
+				ntlmssp_command = NTLMSSP_NEGOTIATE;
+			} else {
+				/* This is normal in SPNEGO mech negotiation fallback */
+				DEBUG(2, ("Failed to parse NTLMSSP packet: zero length\n"));
+				return NT_STATUS_INVALID_PARAMETER;
+			}
+			break;
+		}
+	} else {
+		if (!msrpc_parse(ntlmssp_state,
+				 &input, "Cd",
+				 "NTLMSSP",
+				 &ntlmssp_command)) {
+			DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
+			dump_data(2, input.data, input.length);
+			return NT_STATUS_INVALID_PARAMETER;
+		}
+	}
+
+	if (ntlmssp_command != ntlmssp_state->expected_state) {
+		DEBUG(2, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	for (i=0; i < ARRAY_SIZE(ntlmssp_callbacks); i++) {
+		if (ntlmssp_callbacks[i].role == ntlmssp_state->role &&
+		    ntlmssp_callbacks[i].command == ntlmssp_command) {
+			*idx = i;
+			return NT_STATUS_OK;
+		}
+	}
+
+	DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
+		  ntlmssp_state->role, ntlmssp_command));
+
+	return NT_STATUS_INVALID_PARAMETER;
+}
+
+/**
+ * Next state function for the wrapped NTLMSSP state machine
+ *
+ * @param gensec_security GENSEC state, initialised to NTLMSSP
+ * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
+ * @param in The request, as a DATA_BLOB
+ * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
+ * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
+ *                or NT_STATUS_OK if the user is authenticated.
+ */
+
+static NTSTATUS gensec_ntlmssp_update(struct gensec_security *gensec_security,
+				      TALLOC_CTX *out_mem_ctx,
+				      struct tevent_context *ev,
+				      const DATA_BLOB input, DATA_BLOB *out)
+{
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+	struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
+	NTSTATUS status;
+	uint32_t i;
+
+	*out = data_blob(NULL, 0);
+
+	if (!out_mem_ctx) {
+		/* if the caller doesn't want to manage/own the memory,
+		   we can put it on our context */
+		out_mem_ctx = ntlmssp_state;
+	}
+
+	status = gensec_ntlmssp_update_find(ntlmssp_state, input, &i);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	status = ntlmssp_callbacks[i].sync_fn(gensec_security, out_mem_ctx, input, out);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	return NT_STATUS_OK;
+}
+
+static const char *gensec_ntlmssp_oids[] = {
+	GENSEC_OID_NTLMSSP,
+	NULL
+};
+
+static const struct gensec_security_ops gensec_ntlmssp_security_ops = {
+	.name		= "ntlmssp",
+	.sasl_name	= GENSEC_SASL_NAME_NTLMSSP, /* "NTLM" */
+	.auth_type	= DCERPC_AUTH_TYPE_NTLMSSP,
+	.oid            = gensec_ntlmssp_oids,
+	.client_start   = gensec_ntlmssp_client_start,
+	.server_start   = gensec_ntlmssp_server_start,
+	.magic 	        = gensec_ntlmssp_magic,
+	.update 	= gensec_ntlmssp_update,
+	.sig_size	= gensec_ntlmssp_sig_size,
+	.sign_packet	= gensec_ntlmssp_sign_packet,
+	.check_packet	= gensec_ntlmssp_check_packet,
+	.seal_packet	= gensec_ntlmssp_seal_packet,
+	.unseal_packet	= gensec_ntlmssp_unseal_packet,
+	.wrap           = gensec_ntlmssp_wrap,
+	.unwrap         = gensec_ntlmssp_unwrap,
+	.session_key	= gensec_ntlmssp_session_key,
+	.session_info   = gensec_ntlmssp_session_info,
+	.have_feature   = gensec_ntlmssp_have_feature,
+	.enabled        = true,
+	.priority       = GENSEC_NTLMSSP
+};
+
+
+_PUBLIC_ NTSTATUS gensec_ntlmssp_init(void)
+{
+	NTSTATUS ret;
+
+	ret = gensec_register(&gensec_ntlmssp_security_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register '%s' gensec backend!\n",
+			gensec_ntlmssp_security_ops.name));
+		return ret;
+	}
+
+	return ret;
+}