2
Unix SMB/CIFS implementation.
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Kerberos backend for GENSEC
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
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Copyright (C) Stefan Metzmacher <metze@samba.org> 2004-2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "lib/events/events.h"
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#include "system/kerberos.h"
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#include "auth/kerberos/kerberos.h"
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#include "librpc/gen_ndr/krb5pac.h"
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#include "auth/auth.h"
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#include "lib/ldb/include/ldb.h"
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#include "auth/auth_sam.h"
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#include "librpc/rpc/dcerpc.h"
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#include "auth/credentials/credentials.h"
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#include "auth/credentials/credentials_krb5.h"
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#include "auth/gensec/gensec.h"
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#include "auth/gensec/gensec_proto.h"
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#include "param/param.h"
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#include "auth/session_proto.h"
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#include <gssapi/gssapi.h>
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#include <gssapi/gssapi_krb5.h>
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#include "auth/gensec/gensec_gssapi.h"
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static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
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static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
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static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
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OM_uint32 maj_stat, OM_uint32 min_stat,
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OM_uint32 disp_min_stat, disp_maj_stat;
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gss_buffer_desc maj_error_message;
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gss_buffer_desc min_error_message;
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char *maj_error_string, *min_error_string;
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OM_uint32 msg_ctx = 0;
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maj_error_message.value = NULL;
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min_error_message.value = NULL;
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maj_error_message.length = 0;
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min_error_message.length = 0;
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disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
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mech, &msg_ctx, &maj_error_message);
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disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
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mech, &msg_ctx, &min_error_message);
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maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
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min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
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ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
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talloc_free(maj_error_string);
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talloc_free(min_error_string);
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gss_release_buffer(&disp_min_stat, &maj_error_message);
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gss_release_buffer(&disp_min_stat, &min_error_message);
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static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
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OM_uint32 maj_stat, min_stat;
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if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
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maj_stat = gss_release_cred(&min_stat,
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&gensec_gssapi_state->delegated_cred_handle);
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if (gensec_gssapi_state->gssapi_context != GSS_C_NO_CONTEXT) {
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maj_stat = gss_delete_sec_context (&min_stat,
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&gensec_gssapi_state->gssapi_context,
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if (gensec_gssapi_state->server_name != GSS_C_NO_NAME) {
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maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->server_name);
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if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
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maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
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if (gensec_gssapi_state->lucid) {
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gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
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static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
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OM_uint32 maj_stat, min_stat;
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if (gensec_gssapi_state->lucid) {
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maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
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&gensec_gssapi_state->gssapi_context,
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(void **)&gensec_gssapi_state->lucid);
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if (maj_stat != GSS_S_COMPLETE) {
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DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
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gssapi_error_string(gensec_gssapi_state,
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gensec_gssapi_state->gss_oid)));
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return NT_STATUS_INTERNAL_ERROR;
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if (gensec_gssapi_state->lucid->version != 1) {
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DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
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gensec_gssapi_state->lucid->version));
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gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
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gensec_gssapi_state->lucid = NULL;
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return NT_STATUS_INTERNAL_ERROR;
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static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
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struct gensec_gssapi_state *gensec_gssapi_state;
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struct gsskrb5_send_to_kdc send_to_kdc;
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gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
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if (!gensec_gssapi_state) {
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return NT_STATUS_NO_MEMORY;
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gensec_gssapi_state->gss_exchange_count = 0;
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gensec_gssapi_state->max_wrap_buf_size
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= gensec_setting_int(gensec_security->settings, "gensec_gssapi", "max wrap buf size", 65536);
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gensec_gssapi_state->sasl = false;
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gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
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gensec_security->private_data = gensec_gssapi_state;
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gensec_gssapi_state->gssapi_context = GSS_C_NO_CONTEXT;
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gensec_gssapi_state->server_name = GSS_C_NO_NAME;
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gensec_gssapi_state->client_name = GSS_C_NO_NAME;
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gensec_gssapi_state->lucid = NULL;
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/* TODO: Fill in channel bindings */
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gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
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gensec_gssapi_state->want_flags = 0;
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if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "mutual", true)) {
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gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
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if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "delegation", true)) {
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gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
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if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "replay", true)) {
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gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
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if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "sequence", true)) {
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gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
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gensec_gssapi_state->got_flags = 0;
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gensec_gssapi_state->session_key = data_blob(NULL, 0);
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gensec_gssapi_state->pac = data_blob(NULL, 0);
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gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
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gensec_gssapi_state->sig_size = 0;
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talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
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if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
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gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
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if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
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gensec_gssapi_state->want_flags |= GSS_C_CONF_FLAG;
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if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
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gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
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gensec_gssapi_state->gss_oid = GSS_C_NULL_OID;
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send_to_kdc.func = smb_krb5_send_and_recv_func;
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send_to_kdc.ptr = gensec_security->event_ctx;
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ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
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DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
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talloc_free(gensec_gssapi_state);
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return NT_STATUS_INTERNAL_ERROR;
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if (lp_realm(gensec_security->settings->lp_ctx) && *lp_realm(gensec_security->settings->lp_ctx)) {
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char *upper_realm = strupper_talloc(gensec_gssapi_state, lp_realm(gensec_security->settings->lp_ctx));
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DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(gensec_security->settings->lp_ctx)));
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talloc_free(gensec_gssapi_state);
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return NT_STATUS_NO_MEMORY;
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ret = gsskrb5_set_default_realm(upper_realm);
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talloc_free(upper_realm);
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DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
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talloc_free(gensec_gssapi_state);
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return NT_STATUS_INTERNAL_ERROR;
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/* don't do DNS lookups of any kind, it might/will fail for a netbios name */
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ret = gsskrb5_set_dns_canonicalize(gensec_setting_bool(gensec_security->settings, "krb5", "set_dns_canonicalize", false));
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DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
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talloc_free(gensec_gssapi_state);
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return NT_STATUS_INTERNAL_ERROR;
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ret = smb_krb5_init_context(gensec_gssapi_state,
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gensec_security->event_ctx,
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gensec_security->settings->lp_ctx,
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&gensec_gssapi_state->smb_krb5_context);
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DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
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error_message(ret)));
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talloc_free(gensec_gssapi_state);
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return NT_STATUS_INTERNAL_ERROR;
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static NTSTATUS gensec_gssapi_server_start(struct gensec_security *gensec_security)
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struct gensec_gssapi_state *gensec_gssapi_state;
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struct cli_credentials *machine_account;
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struct gssapi_creds_container *gcc;
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nt_status = gensec_gssapi_start(gensec_security);
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if (!NT_STATUS_IS_OK(nt_status)) {
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gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
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machine_account = gensec_get_credentials(gensec_security);
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if (!machine_account) {
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DEBUG(3, ("No machine account credentials specified\n"));
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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ret = cli_credentials_get_server_gss_creds(machine_account,
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gensec_security->event_ctx,
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gensec_security->settings->lp_ctx, &gcc);
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DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
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error_message(ret)));
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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gensec_gssapi_state->server_cred = gcc;
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static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
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struct gensec_gssapi_state *gensec_gssapi_state;
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nt_status = gensec_gssapi_server_start(gensec_security);
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if (NT_STATUS_IS_OK(nt_status)) {
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gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
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gensec_gssapi_state->sasl = true;
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static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
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struct gensec_gssapi_state *gensec_gssapi_state;
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struct cli_credentials *creds = gensec_get_credentials(gensec_security);
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gss_buffer_desc name_token;
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OM_uint32 maj_stat, min_stat;
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const char *hostname = gensec_get_target_hostname(gensec_security);
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const char *principal;
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struct gssapi_creds_container *gcc;
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DEBUG(1, ("Could not determine hostname for target computer, cannot use kerberos\n"));
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return NT_STATUS_INVALID_PARAMETER;
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if (is_ipaddress(hostname)) {
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DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
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return NT_STATUS_INVALID_PARAMETER;
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if (strcmp(hostname, "localhost") == 0) {
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DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
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return NT_STATUS_INVALID_PARAMETER;
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nt_status = gensec_gssapi_start(gensec_security);
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if (!NT_STATUS_IS_OK(nt_status)) {
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gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
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gensec_gssapi_state->gss_oid = gss_mech_krb5;
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principal = gensec_get_target_principal(gensec_security);
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if (principal && lp_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
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name_type = GSS_C_NULL_OID;
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principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
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gensec_get_target_service(gensec_security),
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name_type = GSS_C_NT_HOSTBASED_SERVICE;
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name_token.value = discard_const_p(uint8_t, principal);
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name_token.length = strlen(principal);
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maj_stat = gss_import_name (&min_stat,
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&gensec_gssapi_state->server_name);
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DEBUG(2, ("GSS Import name of %s failed: %s\n",
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(char *)name_token.value,
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gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
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return NT_STATUS_INVALID_PARAMETER;
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ret = cli_credentials_get_client_gss_creds(creds,
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gensec_security->event_ctx,
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gensec_security->settings->lp_ctx, &gcc);
369
case KRB5KDC_ERR_PREAUTH_FAILED:
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return NT_STATUS_LOGON_FAILURE;
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case KRB5_KDC_UNREACH:
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DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
373
return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
375
DEBUG(1, ("Aquiring initiator credentials failed\n"));
376
return NT_STATUS_UNSUCCESSFUL;
379
gensec_gssapi_state->client_cred = gcc;
380
if (!talloc_reference(gensec_gssapi_state, gcc)) {
381
return NT_STATUS_NO_MEMORY;
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static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
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struct gensec_gssapi_state *gensec_gssapi_state;
391
nt_status = gensec_gssapi_client_start(gensec_security);
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if (NT_STATUS_IS_OK(nt_status)) {
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gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
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gensec_gssapi_state->sasl = true;
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* Check if the packet is one for this mechansim
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* @param gensec_security GENSEC state
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* @param in The request, as a DATA_BLOB
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* @return Error, INVALID_PARAMETER if it's not a packet for us
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* or NT_STATUS_OK if the packet is ok.
410
static NTSTATUS gensec_gssapi_magic(struct gensec_security *gensec_security,
413
if (gensec_gssapi_check_oid(in, GENSEC_OID_KERBEROS5)) {
416
return NT_STATUS_INVALID_PARAMETER;
422
* Next state function for the GSSAPI GENSEC mechanism
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* @param gensec_gssapi_state GSSAPI State
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* @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
426
* @param in The request, as a DATA_BLOB
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* @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
428
* @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
429
* or NT_STATUS_OK if the user is authenticated.
432
static NTSTATUS gensec_gssapi_update(struct gensec_security *gensec_security,
433
TALLOC_CTX *out_mem_ctx,
434
const DATA_BLOB in, DATA_BLOB *out)
436
struct gensec_gssapi_state *gensec_gssapi_state
437
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
438
NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
439
OM_uint32 maj_stat, min_stat;
441
gss_buffer_desc input_token, output_token;
442
gss_OID gss_oid_p = NULL;
443
input_token.length = in.length;
444
input_token.value = in.data;
446
switch (gensec_gssapi_state->sasl_state) {
449
switch (gensec_security->gensec_role) {
452
maj_stat = gss_init_sec_context(&min_stat,
453
gensec_gssapi_state->client_cred->creds,
454
&gensec_gssapi_state->gssapi_context,
455
gensec_gssapi_state->server_name,
456
gensec_gssapi_state->gss_oid,
457
gensec_gssapi_state->want_flags,
459
gensec_gssapi_state->input_chan_bindings,
463
&gensec_gssapi_state->got_flags, /* ret flags */
466
gensec_gssapi_state->gss_oid = gss_oid_p;
472
maj_stat = gss_accept_sec_context(&min_stat,
473
&gensec_gssapi_state->gssapi_context,
474
gensec_gssapi_state->server_cred->creds,
476
gensec_gssapi_state->input_chan_bindings,
477
&gensec_gssapi_state->client_name,
480
&gensec_gssapi_state->got_flags,
482
&gensec_gssapi_state->delegated_cred_handle);
484
gensec_gssapi_state->gss_oid = gss_oid_p;
489
return NT_STATUS_INVALID_PARAMETER;
493
gensec_gssapi_state->gss_exchange_count++;
495
if (maj_stat == GSS_S_COMPLETE) {
496
*out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
497
gss_release_buffer(&min_stat2, &output_token);
499
if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
500
DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
502
DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
505
/* We may have been invoked as SASL, so there
506
* is more work to do */
507
if (gensec_gssapi_state->sasl) {
508
/* Due to a very subtle interaction
509
* with SASL and the LDAP libs, we
510
* must ensure the data pointer is
511
* != NULL, but the length is 0.
513
* This ensures we send a 'zero
514
* length' (rather than NULL) response
518
out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
521
gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
522
return NT_STATUS_MORE_PROCESSING_REQUIRED;
524
gensec_gssapi_state->sasl_state = STAGE_DONE;
526
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
527
DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
528
} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
529
DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
531
DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
536
} else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
537
*out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
538
gss_release_buffer(&min_stat2, &output_token);
540
return NT_STATUS_MORE_PROCESSING_REQUIRED;
541
} else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
543
case KRB5_KDC_UNREACH:
544
DEBUG(3, ("Cannot reach a KDC we require: %s\n",
545
gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
546
return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
547
case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
548
DEBUG(3, ("Server is not registered with our KDC: %s\n",
549
gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
550
return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
551
case KRB5KRB_AP_ERR_MSG_TYPE:
552
/* garbage input, possibly from the auto-mech detection */
553
return NT_STATUS_INVALID_PARAMETER;
555
DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
556
gensec_gssapi_state->gss_exchange_count,
557
gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
561
DEBUG(1, ("GSS Update(%d) failed: %s\n",
562
gensec_gssapi_state->gss_exchange_count,
563
gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
569
/* These last two stages are only done if we were invoked as SASL */
570
case STAGE_SASL_SSF_NEG:
572
switch (gensec_security->gensec_role) {
575
uint8_t maxlength_proposed[4];
576
uint8_t maxlength_accepted[4];
577
uint8_t security_supported;
580
input_token.length = in.length;
581
input_token.value = in.data;
583
/* As a client, we have just send a
584
* zero-length blob to the server (after the
585
* normal GSSAPI exchange), and it has replied
586
* with it's SASL negotiation */
588
maj_stat = gss_unwrap(&min_stat,
589
gensec_gssapi_state->gssapi_context,
594
if (GSS_ERROR(maj_stat)) {
595
DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
596
gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
597
return NT_STATUS_ACCESS_DENIED;
600
if (output_token.length < 4) {
601
return NT_STATUS_INVALID_PARAMETER;
604
memcpy(maxlength_proposed, output_token.value, 4);
605
gss_release_buffer(&min_stat, &output_token);
607
/* first byte is the proposed security */
608
security_supported = maxlength_proposed[0];
609
maxlength_proposed[0] = '\0';
611
/* Rest is the proposed max wrap length */
612
gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
613
gensec_gssapi_state->max_wrap_buf_size);
614
gensec_gssapi_state->sasl_protection = 0;
615
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
616
if (security_supported & NEG_SEAL) {
617
gensec_gssapi_state->sasl_protection |= NEG_SEAL;
619
} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
620
if (security_supported & NEG_SIGN) {
621
gensec_gssapi_state->sasl_protection |= NEG_SIGN;
623
} else if (security_supported & NEG_NONE) {
624
gensec_gssapi_state->sasl_protection |= NEG_NONE;
626
DEBUG(1, ("Remote server does not support unprotected connections"));
627
return NT_STATUS_ACCESS_DENIED;
630
/* Send back the negotiated max length */
632
RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
634
maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
636
input_token.value = maxlength_accepted;
637
input_token.length = sizeof(maxlength_accepted);
639
maj_stat = gss_wrap(&min_stat,
640
gensec_gssapi_state->gssapi_context,
646
if (GSS_ERROR(maj_stat)) {
647
DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
648
gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
649
return NT_STATUS_ACCESS_DENIED;
652
*out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
653
gss_release_buffer(&min_stat, &output_token);
655
/* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
656
gensec_gssapi_state->sasl_state = STAGE_DONE;
658
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
659
DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
660
} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
661
DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
663
DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
670
uint8_t maxlength_proposed[4];
671
uint8_t security_supported = 0x0;
674
/* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
675
if (in.length != 0) {
676
DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
679
/* Give the client some idea what we will support */
681
RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
682
/* first byte is the proposed security */
683
maxlength_proposed[0] = '\0';
685
gensec_gssapi_state->sasl_protection = 0;
686
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
687
security_supported |= NEG_SEAL;
689
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
690
security_supported |= NEG_SIGN;
692
if (security_supported == 0) {
693
/* If we don't support anything, this must be 0 */
694
RSIVAL(maxlength_proposed, 0, 0x0);
697
/* TODO: We may not wish to support this */
698
security_supported |= NEG_NONE;
699
maxlength_proposed[0] = security_supported;
701
input_token.value = maxlength_proposed;
702
input_token.length = sizeof(maxlength_proposed);
704
maj_stat = gss_wrap(&min_stat,
705
gensec_gssapi_state->gssapi_context,
711
if (GSS_ERROR(maj_stat)) {
712
DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
713
gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
714
return NT_STATUS_ACCESS_DENIED;
717
*out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
718
gss_release_buffer(&min_stat, &output_token);
720
gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
721
return NT_STATUS_MORE_PROCESSING_REQUIRED;
724
return NT_STATUS_INVALID_PARAMETER;
728
/* This is s server-only stage */
729
case STAGE_SASL_SSF_ACCEPT:
731
uint8_t maxlength_accepted[4];
732
uint8_t security_accepted;
735
input_token.length = in.length;
736
input_token.value = in.data;
738
maj_stat = gss_unwrap(&min_stat,
739
gensec_gssapi_state->gssapi_context,
744
if (GSS_ERROR(maj_stat)) {
745
DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
746
gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
747
return NT_STATUS_ACCESS_DENIED;
750
if (output_token.length < 4) {
751
return NT_STATUS_INVALID_PARAMETER;
754
memcpy(maxlength_accepted, output_token.value, 4);
755
gss_release_buffer(&min_stat, &output_token);
757
/* first byte is the proposed security */
758
security_accepted = maxlength_accepted[0];
759
maxlength_accepted[0] = '\0';
761
/* Rest is the proposed max wrap length */
762
gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
763
gensec_gssapi_state->max_wrap_buf_size);
765
gensec_gssapi_state->sasl_protection = 0;
766
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
767
if (security_accepted & NEG_SEAL) {
768
gensec_gssapi_state->sasl_protection |= NEG_SEAL;
770
} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
771
if (security_accepted & NEG_SIGN) {
772
gensec_gssapi_state->sasl_protection |= NEG_SIGN;
774
} else if (security_accepted & NEG_NONE) {
775
gensec_gssapi_state->sasl_protection |= NEG_NONE;
777
DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
778
return NT_STATUS_ACCESS_DENIED;
781
/* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
782
gensec_gssapi_state->sasl_state = STAGE_DONE;
783
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
784
DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
785
} else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
786
DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
788
DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
791
*out = data_blob(NULL, 0);
795
return NT_STATUS_INVALID_PARAMETER;
799
static NTSTATUS gensec_gssapi_wrap(struct gensec_security *gensec_security,
804
struct gensec_gssapi_state *gensec_gssapi_state
805
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
806
OM_uint32 maj_stat, min_stat;
807
gss_buffer_desc input_token, output_token;
809
input_token.length = in->length;
810
input_token.value = in->data;
812
maj_stat = gss_wrap(&min_stat,
813
gensec_gssapi_state->gssapi_context,
814
gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
819
if (GSS_ERROR(maj_stat)) {
820
DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
821
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
822
return NT_STATUS_ACCESS_DENIED;
825
*out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
826
gss_release_buffer(&min_stat, &output_token);
828
if (gensec_gssapi_state->sasl) {
829
size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
830
if (max_wrapped_size < out->length) {
831
DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
832
(unsigned)in->length,
833
(unsigned)out->length,
834
(unsigned int)max_wrapped_size));
835
return NT_STATUS_INVALID_PARAMETER;
839
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
841
return NT_STATUS_ACCESS_DENIED;
846
static NTSTATUS gensec_gssapi_unwrap(struct gensec_security *gensec_security,
851
struct gensec_gssapi_state *gensec_gssapi_state
852
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
853
OM_uint32 maj_stat, min_stat;
854
gss_buffer_desc input_token, output_token;
857
input_token.length = in->length;
858
input_token.value = in->data;
860
if (gensec_gssapi_state->sasl) {
861
size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
862
if (max_wrapped_size < in->length) {
863
DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
864
return NT_STATUS_INVALID_PARAMETER;
868
maj_stat = gss_unwrap(&min_stat,
869
gensec_gssapi_state->gssapi_context,
874
if (GSS_ERROR(maj_stat)) {
875
DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
876
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
877
return NT_STATUS_ACCESS_DENIED;
880
*out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);
881
gss_release_buffer(&min_stat, &output_token);
883
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
885
return NT_STATUS_ACCESS_DENIED;
890
/* Find out the maximum input size negotiated on this connection */
892
static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
894
struct gensec_gssapi_state *gensec_gssapi_state
895
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
896
OM_uint32 maj_stat, min_stat;
897
OM_uint32 max_input_size;
899
maj_stat = gss_wrap_size_limit(&min_stat,
900
gensec_gssapi_state->gssapi_context,
901
gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
903
gensec_gssapi_state->max_wrap_buf_size,
905
if (GSS_ERROR(maj_stat)) {
906
TALLOC_CTX *mem_ctx = talloc_new(NULL);
907
DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
908
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
909
talloc_free(mem_ctx);
913
return max_input_size;
916
/* Find out the maximum output size negotiated on this connection */
917
static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
919
struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
920
return gensec_gssapi_state->max_wrap_buf_size;
923
static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
925
uint8_t *data, size_t length,
926
const uint8_t *whole_pdu, size_t pdu_length,
929
struct gensec_gssapi_state *gensec_gssapi_state
930
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
931
OM_uint32 maj_stat, min_stat;
932
gss_buffer_desc input_token, output_token;
936
input_token.length = length;
937
input_token.value = data;
939
maj_stat = gss_wrap(&min_stat,
940
gensec_gssapi_state->gssapi_context,
941
gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
946
if (GSS_ERROR(maj_stat)) {
947
DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
948
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
949
return NT_STATUS_ACCESS_DENIED;
952
if (output_token.length < input_token.length) {
953
DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
954
(long)output_token.length, (long)length));
955
return NT_STATUS_INTERNAL_ERROR;
957
sig_length = output_token.length - input_token.length;
959
memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
960
*sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
962
dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
963
dump_data_pw("gensec_gssapi_seal_packet: clear\n", data, length);
964
dump_data_pw("gensec_gssapi_seal_packet: sealed\n", ((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);
966
gss_release_buffer(&min_stat, &output_token);
968
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
970
return NT_STATUS_ACCESS_DENIED;
975
static NTSTATUS gensec_gssapi_unseal_packet(struct gensec_security *gensec_security,
977
uint8_t *data, size_t length,
978
const uint8_t *whole_pdu, size_t pdu_length,
979
const DATA_BLOB *sig)
981
struct gensec_gssapi_state *gensec_gssapi_state
982
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
983
OM_uint32 maj_stat, min_stat;
984
gss_buffer_desc input_token, output_token;
989
dump_data_pw("gensec_gssapi_unseal_packet: sig\n", sig->data, sig->length);
991
in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
993
memcpy(in.data, sig->data, sig->length);
994
memcpy(in.data + sig->length, data, length);
996
input_token.length = in.length;
997
input_token.value = in.data;
999
maj_stat = gss_unwrap(&min_stat,
1000
gensec_gssapi_state->gssapi_context,
1005
if (GSS_ERROR(maj_stat)) {
1006
DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
1007
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1008
return NT_STATUS_ACCESS_DENIED;
1011
if (output_token.length != length) {
1012
return NT_STATUS_INTERNAL_ERROR;
1015
memcpy(data, output_token.value, length);
1017
gss_release_buffer(&min_stat, &output_token);
1019
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
1021
return NT_STATUS_ACCESS_DENIED;
1023
return NT_STATUS_OK;
1026
static NTSTATUS gensec_gssapi_sign_packet(struct gensec_security *gensec_security,
1027
TALLOC_CTX *mem_ctx,
1028
const uint8_t *data, size_t length,
1029
const uint8_t *whole_pdu, size_t pdu_length,
1032
struct gensec_gssapi_state *gensec_gssapi_state
1033
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1034
OM_uint32 maj_stat, min_stat;
1035
gss_buffer_desc input_token, output_token;
1037
if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1038
input_token.length = pdu_length;
1039
input_token.value = discard_const_p(uint8_t *, whole_pdu);
1041
input_token.length = length;
1042
input_token.value = discard_const_p(uint8_t *, data);
1045
maj_stat = gss_get_mic(&min_stat,
1046
gensec_gssapi_state->gssapi_context,
1050
if (GSS_ERROR(maj_stat)) {
1051
DEBUG(1, ("GSS GetMic failed: %s\n",
1052
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1053
return NT_STATUS_ACCESS_DENIED;
1056
*sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
1058
dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1060
gss_release_buffer(&min_stat, &output_token);
1062
return NT_STATUS_OK;
1065
static NTSTATUS gensec_gssapi_check_packet(struct gensec_security *gensec_security,
1066
TALLOC_CTX *mem_ctx,
1067
const uint8_t *data, size_t length,
1068
const uint8_t *whole_pdu, size_t pdu_length,
1069
const DATA_BLOB *sig)
1071
struct gensec_gssapi_state *gensec_gssapi_state
1072
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1073
OM_uint32 maj_stat, min_stat;
1074
gss_buffer_desc input_token;
1075
gss_buffer_desc input_message;
1076
gss_qop_t qop_state;
1078
dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
1080
if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
1081
input_message.length = pdu_length;
1082
input_message.value = discard_const(whole_pdu);
1084
input_message.length = length;
1085
input_message.value = discard_const(data);
1088
input_token.length = sig->length;
1089
input_token.value = sig->data;
1091
maj_stat = gss_verify_mic(&min_stat,
1092
gensec_gssapi_state->gssapi_context,
1096
if (GSS_ERROR(maj_stat)) {
1097
DEBUG(1, ("GSS VerifyMic failed: %s\n",
1098
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1099
return NT_STATUS_ACCESS_DENIED;
1102
return NT_STATUS_OK;
1105
/* Try to figure out what features we actually got on the connection */
1106
static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
1109
struct gensec_gssapi_state *gensec_gssapi_state
1110
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1111
if (feature & GENSEC_FEATURE_SIGN) {
1112
/* If we are going GSSAPI SASL, then we honour the second negotiation */
1113
if (gensec_gssapi_state->sasl
1114
&& gensec_gssapi_state->sasl_state == STAGE_DONE) {
1115
return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
1116
&& (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
1118
return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
1120
if (feature & GENSEC_FEATURE_SEAL) {
1121
/* If we are going GSSAPI SASL, then we honour the second negotiation */
1122
if (gensec_gssapi_state->sasl
1123
&& gensec_gssapi_state->sasl_state == STAGE_DONE) {
1124
return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
1125
&& (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
1127
return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
1129
if (feature & GENSEC_FEATURE_SESSION_KEY) {
1130
/* Only for GSSAPI/Krb5 */
1131
if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
1135
if (feature & GENSEC_FEATURE_DCE_STYLE) {
1136
return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
1138
if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
1141
if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
1145
if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "force_new_spnego", false)) {
1148
if (gensec_setting_bool(gensec_security->settings, "gensec_gssapi", "disable_new_spnego", false)) {
1152
status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1153
if (!NT_STATUS_IS_OK(status)) {
1157
if (gensec_gssapi_state->lucid->protocol == 1) {
1163
/* We can always do async (rather than strict request/reply) packets. */
1164
if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
1171
* Extract the 'sesssion key' needed by SMB signing and ncacn_np
1172
* (for encrypting some passwords).
1174
* This breaks all the abstractions, but what do you expect...
1176
static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
1177
DATA_BLOB *session_key)
1179
struct gensec_gssapi_state *gensec_gssapi_state
1180
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1181
OM_uint32 maj_stat, min_stat;
1182
krb5_keyblock *subkey;
1184
if (gensec_gssapi_state->sasl_state != STAGE_DONE) {
1185
return NT_STATUS_NO_USER_SESSION_KEY;
1188
if (gensec_gssapi_state->session_key.data) {
1189
*session_key = gensec_gssapi_state->session_key;
1190
return NT_STATUS_OK;
1193
maj_stat = gsskrb5_get_subkey(&min_stat,
1194
gensec_gssapi_state->gssapi_context,
1196
if (maj_stat != 0) {
1197
DEBUG(1, ("NO session key for this mech\n"));
1198
return NT_STATUS_NO_USER_SESSION_KEY;
1201
DEBUG(10, ("Got KRB5 session key of length %d%s\n",
1202
(int)KRB5_KEY_LENGTH(subkey),
1203
(gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
1204
*session_key = data_blob_talloc(gensec_gssapi_state,
1205
KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
1206
krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
1207
gensec_gssapi_state->session_key = *session_key;
1208
dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
1210
return NT_STATUS_OK;
1213
/* Get some basic (and authorization) information about the user on
1214
* this session. This uses either the PAC (if present) or a local
1215
* database lookup */
1216
static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
1217
struct auth_session_info **_session_info)
1220
TALLOC_CTX *mem_ctx;
1221
struct gensec_gssapi_state *gensec_gssapi_state
1222
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1223
struct auth_serversupplied_info *server_info = NULL;
1224
struct auth_session_info *session_info = NULL;
1225
OM_uint32 maj_stat, min_stat;
1226
gss_buffer_desc pac;
1229
if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
1230
|| (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
1231
gensec_gssapi_state->gss_oid->length) != 0)) {
1232
DEBUG(1, ("NO session info available for this mech\n"));
1233
return NT_STATUS_INVALID_PARAMETER;
1236
mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
1237
NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
1239
maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
1240
gensec_gssapi_state->gssapi_context,
1241
KRB5_AUTHDATA_WIN2K_PAC,
1245
if (maj_stat == 0) {
1246
pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
1247
gss_release_buffer(&min_stat, &pac);
1250
pac_blob = data_blob(NULL, 0);
1253
/* IF we have the PAC - otherwise we need to get this
1254
* data from elsewere - local ldb, or (TODO) lookup of some
1257
if (pac_blob.length) {
1258
nt_status = kerberos_pac_blob_to_server_info(mem_ctx,
1259
gensec_security->settings->iconv_convenience,
1261
gensec_gssapi_state->smb_krb5_context->krb5_context,
1263
if (!NT_STATUS_IS_OK(nt_status)) {
1264
talloc_free(mem_ctx);
1268
gss_buffer_desc name_token;
1269
char *principal_string;
1271
maj_stat = gss_display_name (&min_stat,
1272
gensec_gssapi_state->client_name,
1275
if (GSS_ERROR(maj_stat)) {
1276
DEBUG(1, ("GSS display_name failed: %s\n",
1277
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1278
talloc_free(mem_ctx);
1279
return NT_STATUS_FOOBAR;
1282
principal_string = talloc_strndup(mem_ctx,
1283
(const char *)name_token.value,
1286
gss_release_buffer(&min_stat, &name_token);
1288
if (!principal_string) {
1289
talloc_free(mem_ctx);
1290
return NT_STATUS_NO_MEMORY;
1293
if (gensec_security->auth_context &&
1294
!gensec_setting_bool(gensec_security->settings, "gensec", "require_pac", false)) {
1295
DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
1296
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1297
nt_status = gensec_security->auth_context->get_server_info_principal(mem_ctx,
1298
gensec_security->auth_context,
1302
if (!NT_STATUS_IS_OK(nt_status)) {
1303
talloc_free(mem_ctx);
1307
DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
1309
gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
1310
return NT_STATUS_ACCESS_DENIED;
1314
/* references the server_info into the session_info */
1315
nt_status = auth_generate_session_info(mem_ctx, gensec_security->event_ctx,
1316
gensec_security->settings->lp_ctx, server_info, &session_info);
1317
if (!NT_STATUS_IS_OK(nt_status)) {
1318
talloc_free(mem_ctx);
1322
nt_status = gensec_gssapi_session_key(gensec_security, &session_info->session_key);
1323
if (!NT_STATUS_IS_OK(nt_status)) {
1324
talloc_free(mem_ctx);
1328
if (!(gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG)) {
1329
DEBUG(10, ("gensec_gssapi: NO delegated credentials supplied by client\n"));
1331
krb5_error_code ret;
1332
DEBUG(10, ("gensec_gssapi: delegated credentials supplied by client\n"));
1333
session_info->credentials = cli_credentials_init(session_info);
1334
if (!session_info->credentials) {
1335
talloc_free(mem_ctx);
1336
return NT_STATUS_NO_MEMORY;
1339
cli_credentials_set_conf(session_info->credentials, gensec_security->settings->lp_ctx);
1340
/* Just so we don't segfault trying to get at a username */
1341
cli_credentials_set_anonymous(session_info->credentials);
1343
ret = cli_credentials_set_client_gss_creds(session_info->credentials,
1344
gensec_security->event_ctx,
1345
gensec_security->settings->lp_ctx,
1346
gensec_gssapi_state->delegated_cred_handle,
1349
talloc_free(mem_ctx);
1350
return NT_STATUS_NO_MEMORY;
1353
/* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
1354
cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
1356
/* It has been taken from this place... */
1357
gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
1359
talloc_steal(gensec_gssapi_state, session_info);
1360
talloc_free(mem_ctx);
1361
*_session_info = session_info;
1363
return NT_STATUS_OK;
1366
static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
1368
struct gensec_gssapi_state *gensec_gssapi_state
1369
= talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
1372
if (gensec_gssapi_state->sig_size) {
1373
return gensec_gssapi_state->sig_size;
1376
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1377
gensec_gssapi_state->sig_size = 45;
1379
gensec_gssapi_state->sig_size = 37;
1382
status = gensec_gssapi_init_lucid(gensec_gssapi_state);
1383
if (!NT_STATUS_IS_OK(status)) {
1384
return gensec_gssapi_state->sig_size;
1387
if (gensec_gssapi_state->lucid->protocol == 1) {
1388
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1390
* TODO: windows uses 76 here, but we don't know
1391
* gss_wrap works with aes keys yet
1393
gensec_gssapi_state->sig_size = 76;
1395
gensec_gssapi_state->sig_size = 28;
1397
} else if (gensec_gssapi_state->lucid->protocol == 0) {
1398
switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
1400
case KEYTYPE_ARCFOUR:
1401
case KEYTYPE_ARCFOUR_56:
1402
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1403
gensec_gssapi_state->sig_size = 45;
1405
gensec_gssapi_state->sig_size = 37;
1409
if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
1410
gensec_gssapi_state->sig_size = 57;
1412
gensec_gssapi_state->sig_size = 49;
1418
return gensec_gssapi_state->sig_size;
1421
static const char *gensec_gssapi_krb5_oids[] = {
1422
GENSEC_OID_KERBEROS5_OLD,
1423
GENSEC_OID_KERBEROS5,
1427
static const char *gensec_gssapi_spnego_oids[] = {
1432
/* As a server, this could in theory accept any GSSAPI mech */
1433
static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
1434
.name = "gssapi_spnego",
1435
.sasl_name = "GSS-SPNEGO",
1436
.auth_type = DCERPC_AUTH_TYPE_SPNEGO,
1437
.oid = gensec_gssapi_spnego_oids,
1438
.client_start = gensec_gssapi_client_start,
1439
.server_start = gensec_gssapi_server_start,
1440
.magic = gensec_gssapi_magic,
1441
.update = gensec_gssapi_update,
1442
.session_key = gensec_gssapi_session_key,
1443
.session_info = gensec_gssapi_session_info,
1444
.sign_packet = gensec_gssapi_sign_packet,
1445
.check_packet = gensec_gssapi_check_packet,
1446
.seal_packet = gensec_gssapi_seal_packet,
1447
.unseal_packet = gensec_gssapi_unseal_packet,
1448
.wrap = gensec_gssapi_wrap,
1449
.unwrap = gensec_gssapi_unwrap,
1450
.have_feature = gensec_gssapi_have_feature,
1453
.priority = GENSEC_GSSAPI
1456
/* As a server, this could in theory accept any GSSAPI mech */
1457
static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
1458
.name = "gssapi_krb5",
1459
.auth_type = DCERPC_AUTH_TYPE_KRB5,
1460
.oid = gensec_gssapi_krb5_oids,
1461
.client_start = gensec_gssapi_client_start,
1462
.server_start = gensec_gssapi_server_start,
1463
.magic = gensec_gssapi_magic,
1464
.update = gensec_gssapi_update,
1465
.session_key = gensec_gssapi_session_key,
1466
.session_info = gensec_gssapi_session_info,
1467
.sig_size = gensec_gssapi_sig_size,
1468
.sign_packet = gensec_gssapi_sign_packet,
1469
.check_packet = gensec_gssapi_check_packet,
1470
.seal_packet = gensec_gssapi_seal_packet,
1471
.unseal_packet = gensec_gssapi_unseal_packet,
1472
.wrap = gensec_gssapi_wrap,
1473
.unwrap = gensec_gssapi_unwrap,
1474
.have_feature = gensec_gssapi_have_feature,
1477
.priority = GENSEC_GSSAPI
1480
/* As a server, this could in theory accept any GSSAPI mech */
1481
static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
1482
.name = "gssapi_krb5_sasl",
1483
.sasl_name = "GSSAPI",
1484
.client_start = gensec_gssapi_sasl_client_start,
1485
.server_start = gensec_gssapi_sasl_server_start,
1486
.update = gensec_gssapi_update,
1487
.session_key = gensec_gssapi_session_key,
1488
.session_info = gensec_gssapi_session_info,
1489
.max_input_size = gensec_gssapi_max_input_size,
1490
.max_wrapped_size = gensec_gssapi_max_wrapped_size,
1491
.wrap = gensec_gssapi_wrap,
1492
.unwrap = gensec_gssapi_unwrap,
1493
.have_feature = gensec_gssapi_have_feature,
1496
.priority = GENSEC_GSSAPI
1499
_PUBLIC_ NTSTATUS gensec_gssapi_init(void)
1503
ret = gensec_register(&gensec_gssapi_spnego_security_ops);
1504
if (!NT_STATUS_IS_OK(ret)) {
1505
DEBUG(0,("Failed to register '%s' gensec backend!\n",
1506
gensec_gssapi_spnego_security_ops.name));
1510
ret = gensec_register(&gensec_gssapi_krb5_security_ops);
1511
if (!NT_STATUS_IS_OK(ret)) {
1512
DEBUG(0,("Failed to register '%s' gensec backend!\n",
1513
gensec_gssapi_krb5_security_ops.name));
1517
ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
1518
if (!NT_STATUS_IS_OK(ret)) {
1519
DEBUG(0,("Failed to register '%s' gensec backend!\n",
1520
gensec_gssapi_sasl_krb5_security_ops.name));
added
removed
source4/auth/gensec/gensec_gssapi.c
