--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ Kerberos backend for GENSEC
+
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "system/kerberos.h"
+#include "system/time.h"
+#include "libcli/auth/kerberos.h"
+#include "auth/auth.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+struct gensec_gssapi_state {
+ gss_ctx_id_t gssapi_context;
+ struct gss_channel_bindings_struct *input_chan_bindings;
+ gss_name_t server_name;
+ gss_name_t client_name;
+ int want_flags, got_flags;
+};
+static int gensec_gssapi_destory(void *ptr)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state = ptr;
+ OM_uint32 maj_stat, min_stat;
+
+ if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
+ maj_stat = gss_delete_sec_context (&min_stat,
+ &gensec_gssapi_state->gssapi_context,
+ GSS_C_NO_BUFFER);
+ }
+
+ if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
+ maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
+ }
+ if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
+ maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
+ }
+ return 0;
+}
+
+static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state;
+
+ gensec_gssapi_state = talloc_p(gensec_security, struct gensec_gssapi_state);
+ if (!gensec_gssapi_state) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ gensec_security->private_data = gensec_gssapi_state;
+
+ gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
+ gensec_gssapi_state->server_name = GSS_C_NO_NAME;
+ gensec_gssapi_state->client_name = GSS_C_NO_NAME;
+
+ talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destory);
+
+ /* TODO: Fill in channel bindings */
+ gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
+
+ gensec_gssapi_state->want_flags = 0;
+ gensec_gssapi_state->got_flags = 0;
+
+ if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
+ /* GSSAPI won't give us the session keys */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+ gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+ gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
+ }
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
+{
+ NTSTATUS nt_status;
+ struct gensec_gssapi_state *gensec_gssapi_state;
+
+ nt_status = gensec_gssapi_start(gensec_security);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
+ gensec_gssapi_state = gensec_security->private_data;
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state;
+ NTSTATUS nt_status;
+ gss_buffer_desc name_token;
+ OM_uint32 maj_stat, min_stat;
+
+ nt_status = gensec_gssapi_start(gensec_security);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return nt_status;
+ }
+
+ gensec_gssapi_state = gensec_security->private_data;
+
+ name_token.value = talloc_asprintf(gensec_gssapi_state, "%s@%s", gensec_get_target_service(gensec_security),
+ gensec_get_target_hostname(gensec_security));
+ DEBUG(0, ("name: %s\n", (char *)name_token.value));
+ name_token.length = strlen(name_token.value);
+
+ maj_stat = gss_import_name (&min_stat,
+ &name_token,
+ GSS_C_NT_HOSTBASED_SERVICE,
+ &gensec_gssapi_state->server_name);
+
+
+ if (maj_stat) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+ return NT_STATUS_OK;
+}
+
+
+
+/**
+ * Next state function for the GSSAPI GENSEC mechanism
+ *
+ * @param gensec_gssapi_state GSSAPI State
+ * @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_gssapi_update(struct gensec_security *gensec_security,
+ TALLOC_CTX *out_mem_ctx,
+ const DATA_BLOB in, DATA_BLOB *out)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+ OM_uint32 maj_stat, min_stat;
+ OM_uint32 min_stat2;
+ gss_buffer_desc input_token, output_token;
+
+ input_token.length = in.length;
+ input_token.value = in.data;
+
+ switch (gensec_security->gensec_role) {
+ case GENSEC_CLIENT:
+ {
+ maj_stat = gss_init_sec_context(&min_stat,
+ GSS_C_NO_CREDENTIAL,
+ &gensec_gssapi_state->gssapi_context,
+ gensec_gssapi_state->server_name,
+ GSS_C_NO_OID,
+ gensec_gssapi_state->want_flags,
+ 0,
+ gensec_gssapi_state->input_chan_bindings,
+ &input_token,
+ NULL,
+ &output_token,
+ &gensec_gssapi_state->got_flags, /* ret flags */
+ NULL);
+ break;
+ }
+ case GENSEC_SERVER:
+ {
+ maj_stat = gss_accept_sec_context(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ GSS_C_NO_CREDENTIAL,
+ &input_token,
+ gensec_gssapi_state->input_chan_bindings,
+ &gensec_gssapi_state->client_name,
+ NULL /* mech oid */,
+ &output_token,
+ &gensec_gssapi_state->got_flags,
+ NULL,
+ NULL);
+ break;
+ }
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+
+ }
+
+ *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat2, &output_token);
+
+ if (maj_stat == GSS_S_COMPLETE) {
+ return NT_STATUS_OK;
+ } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else {
+ gss_buffer_desc msg1, msg2;
+ OM_uint32 msg_ctx = 0;
+
+ msg1.value = NULL;
+ msg2.value = NULL;
+ gss_display_status(&min_stat2, maj_stat, GSS_C_GSS_CODE,
+ GSS_C_NULL_OID, &msg_ctx, &msg1);
+ gss_display_status(&min_stat2, min_stat, GSS_C_MECH_CODE,
+ GSS_C_NULL_OID, &msg_ctx, &msg2);
+ DEBUG(1, ("gensec_gssapi_update: %s : %s\n", (char *)msg1.value, (char *)msg2.value));
+ gss_release_buffer(&min_stat2, &msg1);
+ gss_release_buffer(&min_stat2, &msg2);
+
+ return nt_status;
+ }
+
+}
+
+static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *in,
+ DATA_BLOB *out)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ OM_uint32 maj_stat, min_stat;
+ gss_buffer_desc input_token, output_token;
+ int conf_state;
+ input_token.length = in->length;
+ input_token.value = in->data;
+
+ maj_stat = gss_wrap(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
+ GSS_C_QOP_DEFAULT,
+ &input_token,
+ &conf_state,
+ &output_token);
+ if (GSS_ERROR(maj_stat)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
+
+ gss_release_buffer(&min_stat, &output_token);
+
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
+ && !conf_state) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *in,
+ DATA_BLOB *out)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ OM_uint32 maj_stat, min_stat;
+ gss_buffer_desc input_token, output_token;
+ int conf_state;
+ gss_qop_t qop_state;
+ input_token.length = in->length;
+ input_token.value = in->data;
+
+ maj_stat = gss_unwrap(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ &input_token,
+ &output_token,
+ &conf_state,
+ &qop_state);
+ if (GSS_ERROR(maj_stat)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ *out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
+
+ gss_release_buffer(&min_stat, &output_token);
+
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
+ && !conf_state) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ return NT_STATUS_OK;
+}
+
+static BOOL gensec_gssapi_have_feature(struct gensec_security *gensec_security,
+ uint32 feature)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ if (feature & GENSEC_FEATURE_SIGN) {
+ return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
+ }
+ if (feature & GENSEC_FEATURE_SEAL) {
+ return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
+ }
+ return False;
+}
+
+static const struct gensec_security_ops gensec_gssapi_security_ops = {
+ .name = "gssapi",
+ .oid = GENSEC_OID_KERBEROS5,
+ .client_start = gensec_gssapi_client_start,
+ .server_start = gensec_gssapi_server_start,
+ .update = gensec_gssapi_update,
+ .wrap = gensec_gssapi_wrap,
+ .unwrap = gensec_gssapi_unwrap,
+ .have_feature = gensec_gssapi_have_feature
+
+};
+
+NTSTATUS gensec_gssapi_init(void)
+{
+ NTSTATUS ret;
+
+ ret = gensec_register(&gensec_gssapi_security_ops);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(0,("Failed to register '%s' gensec backend!\n",
+ gensec_gssapi_security_ops.name));
+ return ret;
+ }
+
+ return ret;
+}
enum spnego_message_type expected_packet;
enum spnego_state_position state_position;
struct gensec_security *sub_sec_security;
+ BOOL no_response_expected;
};
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
spnego_state->state_position = SPNEGO_CLIENT_START;
spnego_state->sub_sec_security = NULL;
+ spnego_state->no_response_expected = False;
gensec_security->private_data = spnego_state;
return NT_STATUS_OK;
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
spnego_state->state_position = SPNEGO_SERVER_START;
spnego_state->sub_sec_security = NULL;
+ spnego_state->no_response_expected = False;
gensec_security->private_data = spnego_state;
return NT_STATUS_OK;
}
nt_status = gensec_update(spnego_state->sub_sec_security,
out_mem_ctx, in, &unwrapped_out);
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ if (NT_STATUS_IS_OK(nt_status) || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
struct spnego_data spnego_out;
spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
spnego_out.negTokenInit.mechTypes = mechTypes;
/* set next state */
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
spnego_state->state_position = SPNEGO_CLIENT_TARG;
- return nt_status;
+
+ if (NT_STATUS_IS_OK(nt_status)) {
+ spnego_state->no_response_expected = True;
+ }
+
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
talloc_free(spnego_state->sub_sec_security);
spnego_state->sub_sec_security = NULL;
/* set next state */
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
spnego_state->state_position = SPNEGO_CLIENT_TARG;
+
+ if (NT_STATUS_IS_OK(nt_status)) {
+ spnego_state->no_response_expected = True;
+ }
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
return NT_STATUS_ACCESS_DENIED;
}
- nt_status = gensec_update(spnego_state->sub_sec_security,
- out_mem_ctx,
- spnego.negTokenTarg.responseToken,
- &unwrapped_out);
+ if (spnego_state->no_response_expected) {
+ nt_status = NT_STATUS_OK;
+ } else {
+ nt_status = gensec_update(spnego_state->sub_sec_security,
+ out_mem_ctx,
+ spnego.negTokenTarg.responseToken,
+ &unwrapped_out);
+ }
if (NT_STATUS_IS_OK(nt_status)
git.samba.org / jra / samba / .git / commitdiff