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
+ 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,
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.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "lib/events/events.h"
#include "system/kerberos.h"
#include "auth/kerberos/kerberos.h"
-#include "librpc/gen_ndr/ndr_krb5pac.h"
+#include "librpc/gen_ndr/krb5pac.h"
#include "auth/auth.h"
-
-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;
- OM_uint32 want_flags, got_flags;
- const gss_OID_desc *gss_oid;
-
- DATA_BLOB session_key;
- DATA_BLOB pac;
-
- struct smb_krb5_context *smb_krb5_context;
- struct gssapi_creds_container *client_cred;
- struct gssapi_creds_container *server_cred;
-
- gss_cred_id_t delegated_cred_handle;
-};
+#include "lib/ldb/include/ldb.h"
+#include "auth/auth_sam.h"
+#include "librpc/rpc/dcerpc.h"
+#include "auth/credentials/credentials.h"
+#include "auth/credentials/credentials_krb5.h"
+#include "auth/gensec/gensec.h"
+#include "auth/gensec/gensec_proto.h"
+#include "param/param.h"
+#include "auth/session_proto.h"
+#include <gssapi/gssapi.h>
+#include <gssapi/gssapi_krb5.h>
+#include "auth/gensec/gensec_gssapi.h"
+
+static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security);
+static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security);
static char *gssapi_error_string(TALLOC_CTX *mem_ctx,
- OM_uint32 maj_stat, OM_uint32 min_stat)
+ OM_uint32 maj_stat, OM_uint32 min_stat,
+ const gss_OID mech)
{
OM_uint32 disp_min_stat, disp_maj_stat;
gss_buffer_desc maj_error_message;
gss_buffer_desc min_error_message;
+ char *maj_error_string, *min_error_string;
OM_uint32 msg_ctx = 0;
char *ret;
maj_error_message.value = NULL;
min_error_message.value = NULL;
+ maj_error_message.length = 0;
+ min_error_message.length = 0;
disp_maj_stat = gss_display_status(&disp_min_stat, maj_stat, GSS_C_GSS_CODE,
- GSS_C_NULL_OID, &msg_ctx, &maj_error_message);
+ mech, &msg_ctx, &maj_error_message);
disp_maj_stat = gss_display_status(&disp_min_stat, min_stat, GSS_C_MECH_CODE,
- GSS_C_NULL_OID, &msg_ctx, &min_error_message);
- ret = talloc_asprintf(mem_ctx, "%s: %s", (char *)maj_error_message.value, (char *)min_error_message.value);
+ mech, &msg_ctx, &min_error_message);
+
+ maj_error_string = talloc_strndup(mem_ctx, (char *)maj_error_message.value, maj_error_message.length);
+
+ min_error_string = talloc_strndup(mem_ctx, (char *)min_error_message.value, min_error_message.length);
+
+ ret = talloc_asprintf(mem_ctx, "%s: %s", maj_error_string, min_error_string);
+
+ talloc_free(maj_error_string);
+ talloc_free(min_error_string);
gss_release_buffer(&disp_min_stat, &maj_error_message);
gss_release_buffer(&disp_min_stat, &min_error_message);
}
-static int gensec_gssapi_destory(void *ptr)
+static int gensec_gssapi_destructor(struct gensec_gssapi_state *gensec_gssapi_state)
{
- struct gensec_gssapi_state *gensec_gssapi_state = ptr;
OM_uint32 maj_stat, min_stat;
if (gensec_gssapi_state->delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
if (gensec_gssapi_state->client_name != GSS_C_NO_NAME) {
maj_stat = gss_release_name(&min_stat, &gensec_gssapi_state->client_name);
}
+
+ if (gensec_gssapi_state->lucid) {
+ gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
+ }
+
return 0;
}
+static NTSTATUS gensec_gssapi_init_lucid(struct gensec_gssapi_state *gensec_gssapi_state)
+{
+ OM_uint32 maj_stat, min_stat;
+
+ if (gensec_gssapi_state->lucid) {
+ return NT_STATUS_OK;
+ }
+
+ maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
+ &gensec_gssapi_state->gssapi_context,
+ 1,
+ (void **)&gensec_gssapi_state->lucid);
+ if (maj_stat != GSS_S_COMPLETE) {
+ DEBUG(0,("gensec_gssapi_init_lucid: %s\n",
+ gssapi_error_string(gensec_gssapi_state,
+ maj_stat, min_stat,
+ gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ if (gensec_gssapi_state->lucid->version != 1) {
+ DEBUG(0,("gensec_gssapi_init_lucid: lucid version[%d] != 1\n",
+ gensec_gssapi_state->lucid->version));
+ gss_krb5_free_lucid_sec_context(&min_stat, gensec_gssapi_state->lucid);
+ gensec_gssapi_state->lucid = NULL;
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ return NT_STATUS_OK;
+}
+
static NTSTATUS gensec_gssapi_start(struct gensec_security *gensec_security)
{
struct gensec_gssapi_state *gensec_gssapi_state;
krb5_error_code ret;
-
+ struct gsskrb5_send_to_kdc send_to_kdc;
+
gensec_gssapi_state = talloc(gensec_security, struct gensec_gssapi_state);
if (!gensec_gssapi_state) {
return NT_STATUS_NO_MEMORY;
}
+
+ gensec_gssapi_state->gss_exchange_count = 0;
+ gensec_gssapi_state->max_wrap_buf_size
+ = lp_parm_int(gensec_security->lp_ctx, NULL, "gensec_gssapi", "max wrap buf size", 65536);
+
+ gensec_gssapi_state->sasl = false;
+ gensec_gssapi_state->sasl_state = STAGE_GSS_NEG;
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;
+ gensec_gssapi_state->lucid = NULL;
/* TODO: Fill in channel bindings */
gensec_gssapi_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
gensec_gssapi_state->want_flags = 0;
- if (lp_parm_bool(-1, "gensec_gssapi", "mutual", True)) {
+ if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "mutual", true)) {
gensec_gssapi_state->want_flags |= GSS_C_MUTUAL_FLAG;
}
- if (lp_parm_bool(-1, "gensec_gssapi", "delegation", True)) {
+ if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "delegation", true)) {
gensec_gssapi_state->want_flags |= GSS_C_DELEG_FLAG;
}
+ if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "replay", true)) {
+ gensec_gssapi_state->want_flags |= GSS_C_REPLAY_FLAG;
+ }
+ if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "sequence", true)) {
+ gensec_gssapi_state->want_flags |= GSS_C_SEQUENCE_FLAG;
+ }
gensec_gssapi_state->got_flags = 0;
gensec_gssapi_state->pac = data_blob(NULL, 0);
gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
+ gensec_gssapi_state->sig_size = 0;
- talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destory);
+ talloc_set_destructor(gensec_gssapi_state, gensec_gssapi_destructor);
if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
gensec_gssapi_state->want_flags |= GSS_C_INTEG_FLAG;
gensec_gssapi_state->want_flags |= GSS_C_DCE_STYLE;
}
- gensec_gssapi_state->gss_oid = gss_mech_krb5;
+ gensec_gssapi_state->gss_oid = GSS_C_NULL_OID;
+ send_to_kdc.func = smb_krb5_send_and_recv_func;
+ send_to_kdc.ptr = gensec_security->event_ctx;
+
+ ret = gsskrb5_set_send_to_kdc(&send_to_kdc);
+ if (ret) {
+ DEBUG(1,("gensec_krb5_start: gsskrb5_set_send_to_kdc failed\n"));
+ talloc_free(gensec_gssapi_state);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ if (lp_realm(gensec_security->lp_ctx) && *lp_realm(gensec_security->lp_ctx)) {
+ char *upper_realm = strupper_talloc(gensec_gssapi_state, lp_realm(gensec_security->lp_ctx));
+ if (!upper_realm) {
+ DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(gensec_security->lp_ctx)));
+ talloc_free(gensec_gssapi_state);
+ return NT_STATUS_NO_MEMORY;
+ }
+ ret = gsskrb5_set_default_realm(upper_realm);
+ talloc_free(upper_realm);
+ if (ret) {
+ DEBUG(1,("gensec_krb5_start: gsskrb5_set_default_realm failed\n"));
+ talloc_free(gensec_gssapi_state);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ }
+
+ /* don't do DNS lookups of any kind, it might/will fail for a netbios name */
+ ret = gsskrb5_set_dns_canonicalize(lp_parm_bool(gensec_security->lp_ctx, NULL, "krb5", "set_dns_canonicalize", false));
+ if (ret) {
+ DEBUG(1,("gensec_krb5_start: gsskrb5_set_dns_canonicalize failed\n"));
+ talloc_free(gensec_gssapi_state);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
ret = smb_krb5_init_context(gensec_gssapi_state,
+ gensec_security->event_ctx,
+ gensec_security->lp_ctx,
&gensec_gssapi_state->smb_krb5_context);
if (ret) {
- DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
+ DEBUG(1,("gensec_krb5_start: krb5_init_context failed (%s)\n",
error_message(ret)));
+ talloc_free(gensec_gssapi_state);
return NT_STATUS_INTERNAL_ERROR;
}
return NT_STATUS_OK;
return nt_status;
}
- gensec_gssapi_state = gensec_security->private_data;
+ gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
machine_account = gensec_get_credentials(gensec_security);
DEBUG(3, ("No machine account credentials specified\n"));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
} else {
- ret = cli_credentials_get_server_gss_creds(machine_account, &gcc);
+ ret = cli_credentials_get_server_gss_creds(machine_account,
+ gensec_security->event_ctx,
+ gensec_security->lp_ctx, &gcc);
if (ret) {
DEBUG(1, ("Aquiring acceptor credentials failed: %s\n",
error_message(ret)));
}
+static NTSTATUS gensec_gssapi_sasl_server_start(struct gensec_security *gensec_security)
+{
+ NTSTATUS nt_status;
+ struct gensec_gssapi_state *gensec_gssapi_state;
+ nt_status = gensec_gssapi_server_start(gensec_security);
+
+ if (NT_STATUS_IS_OK(nt_status)) {
+ gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
+ gensec_gssapi_state->sasl = true;
+ }
+ return nt_status;
+}
+
static NTSTATUS gensec_gssapi_client_start(struct gensec_security *gensec_security)
{
struct gensec_gssapi_state *gensec_gssapi_state;
DEBUG(2, ("Cannot do GSSAPI to an IP address\n"));
return NT_STATUS_INVALID_PARAMETER;
}
- if (strequal(hostname, "localhost")) {
+ if (strcmp(hostname, "localhost") == 0) {
DEBUG(2, ("GSSAPI to 'localhost' does not make sense\n"));
return NT_STATUS_INVALID_PARAMETER;
}
return nt_status;
}
- gensec_gssapi_state = gensec_security->private_data;
+ gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
- principal = gensec_get_target_principal(gensec_security);
- if (principal && lp_client_use_spnego_principal()) {
- name_token.value = discard_const_p(uint8_t, principal);
- name_token.length = strlen(principal);
+ gensec_gssapi_state->gss_oid = gss_mech_krb5;
+ principal = gensec_get_target_principal(gensec_security);
+ if (principal && lp_client_use_spnego_principal(gensec_security->lp_ctx)) {
name_type = GSS_C_NULL_OID;
} else {
principal = talloc_asprintf(gensec_gssapi_state, "%s@%s",
gensec_get_target_service(gensec_security),
hostname);
- name_token.value = discard_const_p(uint8_t, principal);
- name_token.length = strlen(principal);
-
name_type = GSS_C_NT_HOSTBASED_SERVICE;
}
+ name_token.value = discard_const_p(uint8_t, principal);
+ name_token.length = strlen(principal);
+
maj_stat = gss_import_name (&min_stat,
&name_token,
if (maj_stat) {
DEBUG(2, ("GSS Import name of %s failed: %s\n",
(char *)name_token.value,
- gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
+ gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
return NT_STATUS_INVALID_PARAMETER;
}
- ret = cli_credentials_get_client_gss_creds(creds, &gcc);
+ ret = cli_credentials_get_client_gss_creds(creds,
+ gensec_security->event_ctx,
+ gensec_security->lp_ctx, &gcc);
switch (ret) {
case 0:
break;
+ case KRB5KDC_ERR_PREAUTH_FAILED:
+ return NT_STATUS_LOGON_FAILURE;
case KRB5_KDC_UNREACH:
- DEBUG(3, ("Cannot reach a KDC we require\n"));
+ DEBUG(3, ("Cannot reach a KDC we require to contact %s\n", principal));
return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
default:
- DEBUG(1, ("Aquiring initiator credentails failed\n"));
+ DEBUG(1, ("Aquiring initiator credentials failed\n"));
return NT_STATUS_UNSUCCESSFUL;
}
gensec_gssapi_state->client_cred = gcc;
-
+ if (!talloc_reference(gensec_gssapi_state, gcc)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
return NT_STATUS_OK;
}
+static NTSTATUS gensec_gssapi_sasl_client_start(struct gensec_security *gensec_security)
+{
+ NTSTATUS nt_status;
+ struct gensec_gssapi_state *gensec_gssapi_state;
+ nt_status = gensec_gssapi_client_start(gensec_security);
+
+ if (NT_STATUS_IS_OK(nt_status)) {
+ gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
+ gensec_gssapi_state->sasl = true;
+ }
+ return nt_status;
+}
+
/**
* Check if the packet is one for this mechansim
TALLOC_CTX *out_mem_ctx,
const DATA_BLOB in, DATA_BLOB *out)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
OM_uint32 maj_stat, min_stat;
OM_uint32 min_stat2;
gss_buffer_desc input_token, output_token;
- gss_OID gss_oid_p;
+ gss_OID gss_oid_p = NULL;
input_token.length = in.length;
input_token.value = in.data;
- switch (gensec_security->gensec_role) {
- case GENSEC_CLIENT:
+ switch (gensec_gssapi_state->sasl_state) {
+ case STAGE_GSS_NEG:
{
- maj_stat = gss_init_sec_context(&min_stat,
- gensec_gssapi_state->client_cred->creds,
- &gensec_gssapi_state->gssapi_context,
- gensec_gssapi_state->server_name,
- discard_const_p(gss_OID_desc, gensec_gssapi_state->gss_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);
+ switch (gensec_security->gensec_role) {
+ case GENSEC_CLIENT:
+ {
+ maj_stat = gss_init_sec_context(&min_stat,
+ gensec_gssapi_state->client_cred->creds,
+ &gensec_gssapi_state->gssapi_context,
+ gensec_gssapi_state->server_name,
+ gensec_gssapi_state->gss_oid,
+ gensec_gssapi_state->want_flags,
+ 0,
+ gensec_gssapi_state->input_chan_bindings,
+ &input_token,
+ &gss_oid_p,
+ &output_token,
+ &gensec_gssapi_state->got_flags, /* ret flags */
+ NULL);
+ if (gss_oid_p) {
+ gensec_gssapi_state->gss_oid = gss_oid_p;
+ }
+ break;
+ }
+ case GENSEC_SERVER:
+ {
+ maj_stat = gss_accept_sec_context(&min_stat,
+ &gensec_gssapi_state->gssapi_context,
+ gensec_gssapi_state->server_cred->creds,
+ &input_token,
+ gensec_gssapi_state->input_chan_bindings,
+ &gensec_gssapi_state->client_name,
+ &gss_oid_p,
+ &output_token,
+ &gensec_gssapi_state->got_flags,
+ NULL,
+ &gensec_gssapi_state->delegated_cred_handle);
+ if (gss_oid_p) {
+ gensec_gssapi_state->gss_oid = gss_oid_p;
+ }
+ break;
+ }
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+
+ }
+
+ gensec_gssapi_state->gss_exchange_count++;
+
+ if (maj_stat == GSS_S_COMPLETE) {
+ *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat2, &output_token);
+
+ if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
+ DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
+ } else {
+ DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
+ }
+
+ /* We may have been invoked as SASL, so there
+ * is more work to do */
+ if (gensec_gssapi_state->sasl) {
+ /* Due to a very subtle interaction
+ * with SASL and the LDAP libs, we
+ * must ensure the data pointer is
+ * != NULL, but the length is 0.
+ *
+ * This ensures we send a 'zero
+ * length' (rather than NULL) response
+ */
+
+ if (!out->data) {
+ out->data = (uint8_t *)talloc_strdup(out_mem_ctx, "\0");
+ }
+
+ gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_NEG;
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else {
+ gensec_gssapi_state->sasl_state = STAGE_DONE;
+
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
+ DEBUG(5, ("GSSAPI Connection will be cryptographicly sealed\n"));
+ } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+ DEBUG(5, ("GSSAPI Connection will be cryptographicly signed\n"));
+ } else {
+ DEBUG(5, ("GSSAPI Connection will have no cryptographic protection\n"));
+ }
+
+ return NT_STATUS_OK;
+ }
+ } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
+ *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat2, &output_token);
+
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
+ switch (min_stat) {
+ case KRB5_KDC_UNREACH:
+ DEBUG(3, ("Cannot reach a KDC we require: %s\n",
+ gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
+ case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
+ DEBUG(3, ("Server is not registered with our KDC: %s\n",
+ gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
+ case KRB5KRB_AP_ERR_MSG_TYPE:
+ /* garbage input, possibly from the auto-mech detection */
+ return NT_STATUS_INVALID_PARAMETER;
+ default:
+ DEBUG(1, ("GSS Update(krb5)(%d) Update failed: %s\n",
+ gensec_gssapi_state->gss_exchange_count,
+ gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return nt_status;
+ }
+ } else {
+ DEBUG(1, ("GSS Update(%d) failed: %s\n",
+ gensec_gssapi_state->gss_exchange_count,
+ gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return nt_status;
+ }
break;
}
- case GENSEC_SERVER:
+
+ /* These last two stages are only done if we were invoked as SASL */
+ case STAGE_SASL_SSF_NEG:
{
- maj_stat = gss_accept_sec_context(&min_stat,
- &gensec_gssapi_state->gssapi_context,
- gensec_gssapi_state->server_cred->creds,
- &input_token,
- gensec_gssapi_state->input_chan_bindings,
- &gensec_gssapi_state->client_name,
- &gss_oid_p,
- &output_token,
- &gensec_gssapi_state->got_flags,
- NULL,
- &gensec_gssapi_state->delegated_cred_handle);
- gensec_gssapi_state->gss_oid = gss_oid_p;
- break;
- }
- default:
- return NT_STATUS_INVALID_PARAMETER;
-
- }
+ switch (gensec_security->gensec_role) {
+ case GENSEC_CLIENT:
+ {
+ uint8_t maxlength_proposed[4];
+ uint8_t maxlength_accepted[4];
+ uint8_t security_supported;
+ int conf_state;
+ gss_qop_t qop_state;
+ input_token.length = in.length;
+ input_token.value = in.data;
+
+ /* As a client, we have just send a
+ * zero-length blob to the server (after the
+ * normal GSSAPI exchange), and it has replied
+ * with it's SASL negotiation */
+
+ maj_stat = gss_unwrap(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ &input_token,
+ &output_token,
+ &conf_state,
+ &qop_state);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
+ gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (output_token.length < 4) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- if (maj_stat == GSS_S_COMPLETE) {
- *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
- gss_release_buffer(&min_stat2, &output_token);
+ memcpy(maxlength_proposed, output_token.value, 4);
+ gss_release_buffer(&min_stat, &output_token);
- if (gensec_gssapi_state->got_flags & GSS_C_DELEG_FLAG) {
- DEBUG(5, ("gensec_gssapi: credentials were delegated\n"));
- } else {
- DEBUG(5, ("gensec_gssapi: NO credentials were delegated\n"));
+ /* first byte is the proposed security */
+ security_supported = maxlength_proposed[0];
+ maxlength_proposed[0] = '\0';
+
+ /* Rest is the proposed max wrap length */
+ gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_proposed, 0),
+ gensec_gssapi_state->max_wrap_buf_size);
+ gensec_gssapi_state->sasl_protection = 0;
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
+ if (security_supported & NEG_SEAL) {
+ gensec_gssapi_state->sasl_protection |= NEG_SEAL;
+ }
+ } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+ if (security_supported & NEG_SIGN) {
+ gensec_gssapi_state->sasl_protection |= NEG_SIGN;
+ }
+ } else if (security_supported & NEG_NONE) {
+ gensec_gssapi_state->sasl_protection |= NEG_NONE;
+ } else {
+ DEBUG(1, ("Remote server does not support unprotected connections"));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* Send back the negotiated max length */
+
+ RSIVAL(maxlength_accepted, 0, gensec_gssapi_state->max_wrap_buf_size);
+
+ maxlength_accepted[0] = gensec_gssapi_state->sasl_protection;
+
+ input_token.value = maxlength_accepted;
+ input_token.length = sizeof(maxlength_accepted);
+
+ maj_stat = gss_wrap(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ false,
+ GSS_C_QOP_DEFAULT,
+ &input_token,
+ &conf_state,
+ &output_token);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
+ gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat, &output_token);
+
+ /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
+ gensec_gssapi_state->sasl_state = STAGE_DONE;
+
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
+ DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly sealed\n"));
+ } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+ DEBUG(3, ("SASL/GSSAPI Connection to server will be cryptographicly signed\n"));
+ } else {
+ DEBUG(3, ("SASL/GSSAPI Connection to server will have no cryptographicly protection\n"));
+ }
+
+ return NT_STATUS_OK;
}
+ case GENSEC_SERVER:
+ {
+ uint8_t maxlength_proposed[4];
+ uint8_t security_supported = 0x0;
+ int conf_state;
+
+ /* As a server, we have just been sent a zero-length blob (note this, but it isn't fatal) */
+ if (in.length != 0) {
+ DEBUG(1, ("SASL/GSSAPI: client sent non-zero length starting SASL negotiation!\n"));
+ }
+
+ /* Give the client some idea what we will support */
+
+ RSIVAL(maxlength_proposed, 0, gensec_gssapi_state->max_wrap_buf_size);
+ /* first byte is the proposed security */
+ maxlength_proposed[0] = '\0';
+
+ gensec_gssapi_state->sasl_protection = 0;
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
+ security_supported |= NEG_SEAL;
+ }
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+ security_supported |= NEG_SIGN;
+ }
+ if (security_supported == 0) {
+ /* If we don't support anything, this must be 0 */
+ RSIVAL(maxlength_proposed, 0, 0x0);
+ }
- return NT_STATUS_OK;
- } else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
- *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
- gss_release_buffer(&min_stat2, &output_token);
-
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
- } else if ((gensec_gssapi_state->gss_oid->length == gss_mech_krb5->length)
- && (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
- gensec_gssapi_state->gss_oid->length) == 0)) {
- switch (min_stat) {
- case KRB5_KDC_UNREACH:
- DEBUG(3, ("Cannot reach a KDC we require: %s\n",
- gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
- return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
- case KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN:
- DEBUG(3, ("Server is not registered with our KDC: %s\n",
- gssapi_error_string(gensec_gssapi_state, maj_stat, min_stat)));
- return NT_STATUS_INVALID_PARAMETER; /* Make SPNEGO ignore us, we can't go any further here */
- case KRB5KRB_AP_ERR_MSG_TYPE:
- /* garbage input, possibly from the auto-mech detection */
- return NT_STATUS_INVALID_PARAMETER;
+ /* TODO: We may not wish to support this */
+ security_supported |= NEG_NONE;
+ maxlength_proposed[0] = security_supported;
+
+ input_token.value = maxlength_proposed;
+ input_token.length = sizeof(maxlength_proposed);
+
+ maj_stat = gss_wrap(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ false,
+ GSS_C_QOP_DEFAULT,
+ &input_token,
+ &conf_state,
+ &output_token);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(1, ("GSS Update(SSF_NEG): GSS Wrap failed: %s\n",
+ gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ *out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
+ gss_release_buffer(&min_stat, &output_token);
+
+ gensec_gssapi_state->sasl_state = STAGE_SASL_SSF_ACCEPT;
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
default:
- DEBUG(1, ("GSS(krb5) Update failed: %s\n",
- gssapi_error_string(out_mem_ctx, maj_stat, min_stat)));
- return nt_status;
+ return NT_STATUS_INVALID_PARAMETER;
+
}
- } else {
- DEBUG(1, ("GSS Update failed: %s\n",
- gssapi_error_string(out_mem_ctx, maj_stat, min_stat)));
- return nt_status;
+ }
+ /* This is s server-only stage */
+ case STAGE_SASL_SSF_ACCEPT:
+ {
+ uint8_t maxlength_accepted[4];
+ uint8_t security_accepted;
+ 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)) {
+ DEBUG(1, ("gensec_gssapi_update: GSS UnWrap of SASL protection negotiation failed: %s\n",
+ gssapi_error_string(out_mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (output_token.length < 4) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ memcpy(maxlength_accepted, output_token.value, 4);
+ gss_release_buffer(&min_stat, &output_token);
+
+ /* first byte is the proposed security */
+ security_accepted = maxlength_accepted[0];
+ maxlength_accepted[0] = '\0';
+
+ /* Rest is the proposed max wrap length */
+ gensec_gssapi_state->max_wrap_buf_size = MIN(RIVAL(maxlength_accepted, 0),
+ gensec_gssapi_state->max_wrap_buf_size);
+
+ gensec_gssapi_state->sasl_protection = 0;
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
+ if (security_accepted & NEG_SEAL) {
+ gensec_gssapi_state->sasl_protection |= NEG_SEAL;
+ }
+ } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+ if (security_accepted & NEG_SIGN) {
+ gensec_gssapi_state->sasl_protection |= NEG_SIGN;
+ }
+ } else if (security_accepted & NEG_NONE) {
+ gensec_gssapi_state->sasl_protection |= NEG_NONE;
+ } else {
+ DEBUG(1, ("Remote client does not support unprotected connections, but we failed to negotiate anything better"));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* quirk: This changes the value that gensec_have_feature returns, to be that after SASL negotiation */
+ gensec_gssapi_state->sasl_state = STAGE_DONE;
+ if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)) {
+ DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly sealed\n"));
+ } else if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
+ DEBUG(5, ("SASL/GSSAPI Connection from client will be cryptographicly signed\n"));
+ } else {
+ DEBUG(5, ("SASL/GSSAPI Connection from client will have no cryptographic protection\n"));
+ }
+
+ *out = data_blob(NULL, 0);
+ return NT_STATUS_OK;
+ }
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
}
}
const DATA_BLOB *in,
DATA_BLOB *out)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
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),
&output_token);
if (GSS_ERROR(maj_stat)) {
DEBUG(1, ("gensec_gssapi_wrap: GSS Wrap failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
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_gssapi_state->sasl) {
+ size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
+ if (max_wrapped_size < out->length) {
+ DEBUG(1, ("gensec_gssapi_wrap: when wrapped, INPUT data (%u) is grew to be larger than SASL negotiated maximum output size (%u > %u)\n",
+ (unsigned)in->length,
+ (unsigned)out->length,
+ (unsigned int)max_wrapped_size));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ }
+
if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
&& !conf_state) {
return NT_STATUS_ACCESS_DENIED;
const DATA_BLOB *in,
DATA_BLOB *out)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
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;
+ if (gensec_gssapi_state->sasl) {
+ size_t max_wrapped_size = gensec_gssapi_max_wrapped_size(gensec_security);
+ if (max_wrapped_size < in->length) {
+ DEBUG(1, ("gensec_gssapi_unwrap: WRAPPED data is larger than SASL negotiated maximum size\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ }
+
maj_stat = gss_unwrap(&min_stat,
gensec_gssapi_state->gssapi_context,
&input_token,
&qop_state);
if (GSS_ERROR(maj_stat)) {
DEBUG(1, ("gensec_gssapi_unwrap: GSS UnWrap failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
return NT_STATUS_ACCESS_DENIED;
}
return NT_STATUS_OK;
}
-static size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
+/* Find out the maximum input size negotiated on this connection */
+
+static size_t gensec_gssapi_max_input_size(struct gensec_security *gensec_security)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
OM_uint32 maj_stat, min_stat;
- OM_uint32 output_size;
- if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
- || (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
- gensec_gssapi_state->gss_oid->length) != 0)) {
- DEBUG(1, ("NO sig size available for this mech\n"));
- return 0;
- }
-
- maj_stat = gsskrb5_wrap_size(&min_stat,
- gensec_gssapi_state->gssapi_context,
- gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
- GSS_C_QOP_DEFAULT,
- data_size,
- &output_size);
+ OM_uint32 max_input_size;
+
+ maj_stat = gss_wrap_size_limit(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
+ GSS_C_QOP_DEFAULT,
+ gensec_gssapi_state->max_wrap_buf_size,
+ &max_input_size);
if (GSS_ERROR(maj_stat)) {
TALLOC_CTX *mem_ctx = talloc_new(NULL);
- DEBUG(1, ("gensec_gssapi_seal_packet: determinaing signature size with gss_wrap_size_limit failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ DEBUG(1, ("gensec_gssapi_max_input_size: determinaing signature size with gss_wrap_size_limit failed: %s\n",
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
talloc_free(mem_ctx);
return 0;
}
- if (output_size < data_size) {
- return 0;
- }
+ return max_input_size;
+}
- /* The difference between the max output and the max input must be the signature */
- return output_size - data_size;
+/* Find out the maximum output size negotiated on this connection */
+static size_t gensec_gssapi_max_wrapped_size(struct gensec_security *gensec_security)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);;
+ return gensec_gssapi_state->max_wrap_buf_size;
}
static NTSTATUS gensec_gssapi_seal_packet(struct gensec_security *gensec_security,
const uint8_t *whole_pdu, size_t pdu_length,
DATA_BLOB *sig)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
OM_uint32 maj_stat, min_stat;
gss_buffer_desc input_token, output_token;
int conf_state;
&output_token);
if (GSS_ERROR(maj_stat)) {
DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
return NT_STATUS_ACCESS_DENIED;
}
- sig_length = gensec_gssapi_sig_size(gensec_security, length);
-
- /* Caller must pad to right boundary */
- if (output_token.length != (length + sig_length)) {
- DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] does not match caller length [%ld] plus sig size [%ld] = [%ld]\n",
- (long)output_token.length, (long)length, (long)sig_length, (long)(length + sig_length)));
+ if (output_token.length < input_token.length) {
+ DEBUG(1, ("gensec_gssapi_seal_packet: GSS Wrap length [%ld] *less* than caller length [%ld]\n",
+ (long)output_token.length, (long)length));
return NT_STATUS_INTERNAL_ERROR;
}
+ sig_length = output_token.length - input_token.length;
memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
*sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
const uint8_t *whole_pdu, size_t pdu_length,
const DATA_BLOB *sig)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
OM_uint32 maj_stat, min_stat;
gss_buffer_desc input_token, output_token;
int conf_state;
&qop_state);
if (GSS_ERROR(maj_stat)) {
DEBUG(1, ("gensec_gssapi_unseal_packet: GSS UnWrap failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
return NT_STATUS_ACCESS_DENIED;
}
const uint8_t *whole_pdu, size_t pdu_length,
DATA_BLOB *sig)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
OM_uint32 maj_stat, min_stat;
gss_buffer_desc input_token, output_token;
- int conf_state;
- ssize_t sig_length = 0;
- input_token.length = length;
- input_token.value = discard_const_p(uint8_t *, data);
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
+ input_token.length = pdu_length;
+ input_token.value = discard_const_p(uint8_t *, whole_pdu);
+ } else {
+ input_token.length = length;
+ input_token.value = discard_const_p(uint8_t *, data);
+ }
- maj_stat = gss_wrap(&min_stat,
+ maj_stat = gss_get_mic(&min_stat,
gensec_gssapi_state->gssapi_context,
- 0,
GSS_C_QOP_DEFAULT,
&input_token,
- &conf_state,
&output_token);
if (GSS_ERROR(maj_stat)) {
- DEBUG(1, ("GSS Wrap failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ DEBUG(1, ("GSS GetMic failed: %s\n",
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
return NT_STATUS_ACCESS_DENIED;
}
- if (output_token.length < length) {
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- sig_length = gensec_gssapi_sig_size(gensec_security, length);
-
- /* Caller must pad to right boundary */
- if (output_token.length != (length + sig_length)) {
- DEBUG(1, ("gensec_gssapi_sign_packet: GSS Wrap length [%ld] does not match caller length [%ld] plus sig size [%ld] = [%ld]\n",
- (long)output_token.length, (long)length, (long)sig_length, (long)(length + sig_length)));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);
+ *sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, output_token.length);
dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
const uint8_t *whole_pdu, size_t pdu_length,
const DATA_BLOB *sig)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
OM_uint32 maj_stat, min_stat;
- gss_buffer_desc input_token, output_token;
- int conf_state;
+ gss_buffer_desc input_token;
+ gss_buffer_desc input_message;
gss_qop_t qop_state;
- DATA_BLOB in;
dump_data_pw("gensec_gssapi_seal_packet: sig\n", sig->data, sig->length);
- in = data_blob_talloc(mem_ctx, NULL, sig->length + length);
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN_PKT_HEADER) {
+ input_message.length = pdu_length;
+ input_message.value = discard_const(whole_pdu);
+ } else {
+ input_message.length = length;
+ input_message.value = discard_const(data);
+ }
- memcpy(in.data, sig->data, sig->length);
- memcpy(in.data + sig->length, data, length);
+ input_token.length = sig->length;
+ input_token.value = sig->data;
- input_token.length = in.length;
- input_token.value = in.data;
-
- maj_stat = gss_unwrap(&min_stat,
+ maj_stat = gss_verify_mic(&min_stat,
gensec_gssapi_state->gssapi_context,
+ &input_message,
&input_token,
- &output_token,
- &conf_state,
&qop_state);
if (GSS_ERROR(maj_stat)) {
- DEBUG(1, ("GSS UnWrap failed: %s\n",
- gssapi_error_string(mem_ctx, maj_stat, min_stat)));
+ DEBUG(1, ("GSS VerifyMic failed: %s\n",
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
return NT_STATUS_ACCESS_DENIED;
}
- if (output_token.length != length) {
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- gss_release_buffer(&min_stat, &output_token);
-
return NT_STATUS_OK;
}
-static BOOL gensec_gssapi_have_feature(struct gensec_security *gensec_security,
+/* Try to figure out what features we actually got on the connection */
+static bool gensec_gssapi_have_feature(struct gensec_security *gensec_security,
uint32_t feature)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
if (feature & GENSEC_FEATURE_SIGN) {
+ /* If we are going GSSAPI SASL, then we honour the second negotiation */
+ if (gensec_gssapi_state->sasl
+ && gensec_gssapi_state->sasl_state == STAGE_DONE) {
+ return ((gensec_gssapi_state->sasl_protection & NEG_SIGN)
+ && (gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG));
+ }
return gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG;
}
if (feature & GENSEC_FEATURE_SEAL) {
+ /* If we are going GSSAPI SASL, then we honour the second negotiation */
+ if (gensec_gssapi_state->sasl
+ && gensec_gssapi_state->sasl_state == STAGE_DONE) {
+ return ((gensec_gssapi_state->sasl_protection & NEG_SEAL)
+ && (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG));
+ }
return gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG;
}
if (feature & GENSEC_FEATURE_SESSION_KEY) {
- if ((gensec_gssapi_state->gss_oid->length == gss_mech_krb5->length)
- && (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements, gensec_gssapi_state->gss_oid->length) == 0)) {
- return True;
+ /* Only for GSSAPI/Krb5 */
+ if (gss_oid_equal(gensec_gssapi_state->gss_oid, gss_mech_krb5)) {
+ return true;
}
}
if (feature & GENSEC_FEATURE_DCE_STYLE) {
return gensec_gssapi_state->got_flags & GSS_C_DCE_STYLE;
}
+ if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
+ NTSTATUS status;
+
+ if (!(gensec_gssapi_state->got_flags & GSS_C_INTEG_FLAG)) {
+ return false;
+ }
+
+ if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "force_new_spnego", false)) {
+ return true;
+ }
+ if (lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec_gssapi", "disable_new_spnego", false)) {
+ return false;
+ }
+
+ status = gensec_gssapi_init_lucid(gensec_gssapi_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ return false;
+ }
+
+ if (gensec_gssapi_state->lucid->protocol == 1) {
+ return true;
+ }
+
+ return false;
+ }
+ /* We can always do async (rather than strict request/reply) packets. */
if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
- return True;
+ return true;
}
- return False;
+ return false;
}
+/*
+ * Extract the 'sesssion key' needed by SMB signing and ncacn_np
+ * (for encrypting some passwords).
+ *
+ * This breaks all the abstractions, but what do you expect...
+ */
static NTSTATUS gensec_gssapi_session_key(struct gensec_security *gensec_security,
DATA_BLOB *session_key)
{
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
-
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
+ OM_uint32 maj_stat, min_stat;
+ krb5_keyblock *subkey;
+
if (gensec_gssapi_state->session_key.data) {
*session_key = gensec_gssapi_state->session_key;
return NT_STATUS_OK;
}
- /* Ensure we only call this for GSSAPI/krb5, otherwise things could get very ugly */
- if ((gensec_gssapi_state->gss_oid->length == gss_mech_krb5->length)
- && (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
- gensec_gssapi_state->gss_oid->length) == 0)) {
- OM_uint32 maj_stat;
- krb5_keyblock *skey;
-
- maj_stat = gss_krb5_get_subkey(gensec_gssapi_state->gssapi_context,
- &skey);
-
- if (maj_stat == 0) {
- DEBUG(10, ("Got KRB5 session key of length %d\n",
- (int)KRB5_KEY_LENGTH(skey)));
- gensec_gssapi_state->session_key = data_blob_talloc(gensec_gssapi_state,
- KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
- *session_key = gensec_gssapi_state->session_key;
- dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
-
- krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, skey);
- return NT_STATUS_OK;
- }
+ maj_stat = gsskrb5_get_subkey(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ &subkey);
+ if (maj_stat != 0) {
+ DEBUG(1, ("NO session key for this mech\n"));
return NT_STATUS_NO_USER_SESSION_KEY;
}
- DEBUG(1, ("NO session key for this mech\n"));
- return NT_STATUS_NO_USER_SESSION_KEY;
+ DEBUG(10, ("Got KRB5 session key of length %d%s\n",
+ (int)KRB5_KEY_LENGTH(subkey),
+ (gensec_gssapi_state->sasl_state == STAGE_DONE)?" (done)":""));
+ *session_key = data_blob_talloc(gensec_gssapi_state,
+ KRB5_KEY_DATA(subkey), KRB5_KEY_LENGTH(subkey));
+ krb5_free_keyblock(gensec_gssapi_state->smb_krb5_context->krb5_context, subkey);
+ if (gensec_gssapi_state->sasl_state == STAGE_DONE) {
+ /* only cache in the done stage */
+ gensec_gssapi_state->session_key = *session_key;
+ }
+ dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
+
+ return NT_STATUS_OK;
}
+/* Get some basic (and authorization) information about the user on
+ * this session. This uses either the PAC (if present) or a local
+ * database lookup */
static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_security,
struct auth_session_info **_session_info)
{
NTSTATUS nt_status;
TALLOC_CTX *mem_ctx;
- struct gensec_gssapi_state *gensec_gssapi_state = gensec_security->private_data;
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
struct auth_serversupplied_info *server_info = NULL;
struct auth_session_info *session_info = NULL;
- struct PAC_LOGON_INFO *logon_info;
OM_uint32 maj_stat, min_stat;
- gss_buffer_desc name_token;
gss_buffer_desc pac;
- krb5_keyblock *keyblock;
- time_t authtime;
- krb5_principal principal;
- char *principal_string;
DATA_BLOB pac_blob;
if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
mem_ctx = talloc_named(gensec_gssapi_state, 0, "gensec_gssapi_session_info context");
NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
- maj_stat = gss_display_name (&min_stat,
- gensec_gssapi_state->client_name,
- &name_token,
- NULL);
- if (maj_stat) {
- talloc_free(mem_ctx);
- return NT_STATUS_FOOBAR;
- }
-
- principal_string = talloc_strndup(mem_ctx, name_token.value, name_token.length);
-
- gss_release_buffer(&min_stat, &name_token);
-
- if (!principal_string) {
- talloc_free(mem_ctx);
- return NT_STATUS_NO_MEMORY;
- }
-
- maj_stat = gss_krb5_copy_service_keyblock(&min_stat,
- gensec_gssapi_state->gssapi_context,
- &keyblock);
-
- if (maj_stat == 0) {
- maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
- gensec_gssapi_state->gssapi_context,
- &authtime);
- }
-
- if (maj_stat == 0) {
- maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
- gensec_gssapi_state->gssapi_context,
- KRB5_AUTHDATA_WIN2K_PAC,
- &pac);
- }
-
+ maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
+ gensec_gssapi_state->gssapi_context,
+ KRB5_AUTHDATA_WIN2K_PAC,
+ &pac);
+
+
if (maj_stat == 0) {
pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
gss_release_buffer(&min_stat, &pac);
+
+ } else {
+ pac_blob = data_blob(NULL, 0);
}
/* IF we have the PAC - otherwise we need to get this
* data from elsewere - local ldb, or (TODO) lookup of some
* kind...
*/
- if (maj_stat == 0) {
- krb5_error_code ret;
-
- ret = krb5_parse_name(gensec_gssapi_state->smb_krb5_context->krb5_context,
- principal_string, &principal);
- if (ret) {
+ if (pac_blob.length) {
+ nt_status = kerberos_pac_blob_to_server_info(mem_ctx,
+ lp_iconv_convenience(gensec_security->lp_ctx),
+ pac_blob,
+ gensec_gssapi_state->smb_krb5_context->krb5_context,
+ &server_info);
+ if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
- return NT_STATUS_INVALID_PARAMETER;
+ return nt_status;
}
+ } else {
+ gss_buffer_desc name_token;
+ char *principal_string;
+
+ maj_stat = gss_display_name (&min_stat,
+ gensec_gssapi_state->client_name,
+ &name_token,
+ NULL);
+ if (GSS_ERROR(maj_stat)) {
+ DEBUG(1, ("GSS display_name failed: %s\n",
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ talloc_free(mem_ctx);
+ return NT_STATUS_FOOBAR;
+ }
+
+ principal_string = talloc_strndup(mem_ctx,
+ (const char *)name_token.value,
+ name_token.length);
+
+ gss_release_buffer(&min_stat, &name_token);
- /* decode and verify the pac */
- nt_status = kerberos_pac_logon_info(mem_ctx, &logon_info, pac_blob,
- gensec_gssapi_state->smb_krb5_context->krb5_context,
- NULL, keyblock, principal, authtime, NULL);
- krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
-
- if (NT_STATUS_IS_OK(nt_status)) {
- union netr_Validation validation;
- validation.sam3 = &logon_info->info3;
- nt_status = make_server_info_netlogon_validation(gensec_gssapi_state,
- NULL,
- 3, &validation,
- &server_info);
+ if (!principal_string) {
+ talloc_free(mem_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (!lp_parm_bool(gensec_security->lp_ctx, NULL, "gensec", "require_pac", false)) {
+ DEBUG(1, ("Unable to find PAC, resorting to local user lookup: %s\n",
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ nt_status = sam_get_server_info_principal(mem_ctx, gensec_security->event_ctx,
+ gensec_security->lp_ctx, principal_string,
+ &server_info);
+
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
return nt_status;
}
} else {
- maj_stat = 1;
- }
- }
-
- if (maj_stat) {
- DEBUG(1, ("Unable to use PAC, resorting to local user lookup!\n"));
- nt_status = sam_get_server_info_principal(mem_ctx, principal_string,
- &server_info);
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(mem_ctx);
- return nt_status;
+ DEBUG(1, ("Unable to find PAC in ticket from %s, failing to allow access: %s\n",
+ principal_string,
+ gssapi_error_string(mem_ctx, maj_stat, min_stat, gensec_gssapi_state->gss_oid)));
+ return NT_STATUS_ACCESS_DENIED;
}
}
/* references the server_info into the session_info */
- nt_status = auth_generate_session_info(mem_ctx, server_info, &session_info);
+ nt_status = auth_generate_session_info(mem_ctx, gensec_security->event_ctx,
+ gensec_security->lp_ctx, server_info, &session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
talloc_free(mem_ctx);
return nt_status;
return NT_STATUS_NO_MEMORY;
}
- cli_credentials_set_conf(session_info->credentials);
+ cli_credentials_set_conf(session_info->credentials, gensec_security->lp_ctx);
+ /* Just so we don't segfault trying to get at a username */
+ cli_credentials_set_anonymous(session_info->credentials);
ret = cli_credentials_set_client_gss_creds(session_info->credentials,
+ gensec_security->event_ctx,
+ gensec_security->lp_ctx,
gensec_gssapi_state->delegated_cred_handle,
CRED_SPECIFIED);
if (ret) {
talloc_free(mem_ctx);
return NT_STATUS_NO_MEMORY;
}
+
+ /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
+ cli_credentials_set_kerberos_state(session_info->credentials, CRED_MUST_USE_KERBEROS);
+
/* It has been taken from this place... */
gensec_gssapi_state->delegated_cred_handle = GSS_C_NO_CREDENTIAL;
}
return NT_STATUS_OK;
}
+size_t gensec_gssapi_sig_size(struct gensec_security *gensec_security, size_t data_size)
+{
+ struct gensec_gssapi_state *gensec_gssapi_state
+ = talloc_get_type(gensec_security->private_data, struct gensec_gssapi_state);
+ NTSTATUS status;
+
+ if (gensec_gssapi_state->sig_size) {
+ return gensec_gssapi_state->sig_size;
+ }
+
+ if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
+ gensec_gssapi_state->sig_size = 45;
+ } else {
+ gensec_gssapi_state->sig_size = 37;
+ }
+
+ status = gensec_gssapi_init_lucid(gensec_gssapi_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ return gensec_gssapi_state->sig_size;
+ }
+
+ if (gensec_gssapi_state->lucid->protocol == 1) {
+ if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
+ /*
+ * TODO: windows uses 76 here, but we don't know
+ * gss_wrap works with aes keys yet
+ */
+ gensec_gssapi_state->sig_size = 76;
+ } else {
+ gensec_gssapi_state->sig_size = 28;
+ }
+ } else if (gensec_gssapi_state->lucid->protocol == 0) {
+ switch (gensec_gssapi_state->lucid->rfc1964_kd.ctx_key.type) {
+ case KEYTYPE_DES:
+ case KEYTYPE_ARCFOUR:
+ case KEYTYPE_ARCFOUR_56:
+ if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
+ gensec_gssapi_state->sig_size = 45;
+ } else {
+ gensec_gssapi_state->sig_size = 37;
+ }
+ break;
+ case KEYTYPE_DES3:
+ if (gensec_gssapi_state->got_flags & GSS_C_CONF_FLAG) {
+ gensec_gssapi_state->sig_size = 57;
+ } else {
+ gensec_gssapi_state->sig_size = 49;
+ }
+ break;
+ }
+ }
+
+ return gensec_gssapi_state->sig_size;
+}
+
static const char *gensec_gssapi_krb5_oids[] = {
- GENSEC_OID_KERBEROS5,
GENSEC_OID_KERBEROS5_OLD,
+ GENSEC_OID_KERBEROS5,
+ NULL
+};
+
+static const char *gensec_gssapi_spnego_oids[] = {
+ GENSEC_OID_SPNEGO,
NULL
};
+/* As a server, this could in theory accept any GSSAPI mech */
+static const struct gensec_security_ops gensec_gssapi_spnego_security_ops = {
+ .name = "gssapi_spnego",
+ .sasl_name = "GSS-SPNEGO",
+ .auth_type = DCERPC_AUTH_TYPE_SPNEGO,
+ .oid = gensec_gssapi_spnego_oids,
+ .client_start = gensec_gssapi_client_start,
+ .server_start = gensec_gssapi_server_start,
+ .magic = gensec_gssapi_magic,
+ .update = gensec_gssapi_update,
+ .session_key = gensec_gssapi_session_key,
+ .session_info = gensec_gssapi_session_info,
+ .sign_packet = gensec_gssapi_sign_packet,
+ .check_packet = gensec_gssapi_check_packet,
+ .seal_packet = gensec_gssapi_seal_packet,
+ .unseal_packet = gensec_gssapi_unseal_packet,
+ .wrap = gensec_gssapi_wrap,
+ .unwrap = gensec_gssapi_unwrap,
+ .have_feature = gensec_gssapi_have_feature,
+ .enabled = false,
+ .kerberos = true,
+ .priority = GENSEC_GSSAPI
+};
+
/* As a server, this could in theory accept any GSSAPI mech */
static const struct gensec_security_ops gensec_gssapi_krb5_security_ops = {
.name = "gssapi_krb5",
- .sasl_name = "GSSAPI",
.auth_type = DCERPC_AUTH_TYPE_KRB5,
.oid = gensec_gssapi_krb5_oids,
.client_start = gensec_gssapi_client_start,
.wrap = gensec_gssapi_wrap,
.unwrap = gensec_gssapi_unwrap,
.have_feature = gensec_gssapi_have_feature,
- .enabled = True,
- .kerberos = True
+ .enabled = true,
+ .kerberos = true,
+ .priority = GENSEC_GSSAPI
+};
+
+/* As a server, this could in theory accept any GSSAPI mech */
+static const struct gensec_security_ops gensec_gssapi_sasl_krb5_security_ops = {
+ .name = "gssapi_krb5_sasl",
+ .sasl_name = "GSSAPI",
+ .client_start = gensec_gssapi_sasl_client_start,
+ .server_start = gensec_gssapi_sasl_server_start,
+ .update = gensec_gssapi_update,
+ .session_key = gensec_gssapi_session_key,
+ .session_info = gensec_gssapi_session_info,
+ .max_input_size = gensec_gssapi_max_input_size,
+ .max_wrapped_size = gensec_gssapi_max_wrapped_size,
+ .wrap = gensec_gssapi_wrap,
+ .unwrap = gensec_gssapi_unwrap,
+ .have_feature = gensec_gssapi_have_feature,
+ .enabled = true,
+ .kerberos = true,
+ .priority = GENSEC_GSSAPI
};
-NTSTATUS gensec_gssapi_init(void)
+_PUBLIC_ NTSTATUS gensec_gssapi_init(void)
{
NTSTATUS ret;
+ ret = gensec_register(&gensec_gssapi_spnego_security_ops);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(0,("Failed to register '%s' gensec backend!\n",
+ gensec_gssapi_spnego_security_ops.name));
+ return ret;
+ }
+
ret = gensec_register(&gensec_gssapi_krb5_security_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register '%s' gensec backend!\n",
return ret;
}
+ ret = gensec_register(&gensec_gssapi_sasl_krb5_security_ops);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(0,("Failed to register '%s' gensec backend!\n",
+ gensec_gssapi_sasl_krb5_security_ops.name));
+ return ret;
+ }
+
return ret;
}
git.samba.org / kai / samba.git / blobdiff