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-rw-r--r--auth/gensec/external.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/auth/gensec/external.c b/auth/gensec/external.c
new file mode 100644
index 0000000..300ce6b
--- /dev/null
+++ b/auth/gensec/external.c
@@ -0,0 +1,127 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ SASL/EXTERNAL authentication.
+
+ Copyright (C) Howard Chu <hyc@symas.com> 2013
+
+ 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 <tevent.h>
+#include "lib/util/tevent_ntstatus.h"
+#include "auth/credentials/credentials.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "auth/gensec/gensec_proto.h"
+#include "auth/gensec/gensec_toplevel_proto.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/* SASL/EXTERNAL is essentially a no-op; it is only usable when the transport
+ * layer is already mutually authenticated.
+ */
+
+NTSTATUS gensec_external_init(TALLOC_CTX *ctx);
+
+static NTSTATUS gensec_external_start(struct gensec_security *gensec_security)
+{
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN)
+ return NT_STATUS_INVALID_PARAMETER;
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL)
+ return NT_STATUS_INVALID_PARAMETER;
+
+ return NT_STATUS_OK;
+}
+
+struct gensec_external_update_state {
+ DATA_BLOB out;
+};
+
+static struct tevent_req *gensec_external_update_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct gensec_security *gensec_security,
+ const DATA_BLOB in)
+{
+ struct tevent_req *req;
+ struct gensec_external_update_state *state = NULL;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct gensec_external_update_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->out = data_blob_talloc(state, "", 0);
+ if (tevent_req_nomem(state->out.data, req)) {
+ return tevent_req_post(req, ev);
+ }
+
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+}
+
+static NTSTATUS gensec_external_update_recv(struct tevent_req *req,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
+{
+ struct gensec_external_update_state *state =
+ tevent_req_data(req,
+ struct gensec_external_update_state);
+ NTSTATUS status;
+
+ *out = data_blob_null;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
+ return status;
+ }
+
+ *out = state->out;
+ tevent_req_received(req);
+ return NT_STATUS_OK;
+}
+
+/* We have no features */
+static bool gensec_external_have_feature(struct gensec_security *gensec_security,
+ uint32_t feature)
+{
+ return false;
+}
+
+static const struct gensec_security_ops gensec_external_ops = {
+ .name = "sasl-EXTERNAL",
+ .sasl_name = "EXTERNAL",
+ .client_start = gensec_external_start,
+ .update_send = gensec_external_update_send,
+ .update_recv = gensec_external_update_recv,
+ .have_feature = gensec_external_have_feature,
+ .enabled = true,
+ .priority = GENSEC_EXTERNAL
+};
+
+
+NTSTATUS gensec_external_init(TALLOC_CTX *ctx)
+{
+ NTSTATUS ret;
+
+ ret = gensec_register(ctx, &gensec_external_ops);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(0,("Failed to register '%s' gensec backend!\n",
+ gensec_external_ops.name));
+ }
+ return ret;
+}