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-rw-r--r--auth/ntlmssp/ntlmssp.c211
1 files changed, 211 insertions, 0 deletions
diff --git a/auth/ntlmssp/ntlmssp.c b/auth/ntlmssp/ntlmssp.c
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+++ b/auth/ntlmssp/ntlmssp.c
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+/*
+ 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;
+}