*/
#include "includes.h"
+#include <tevent.h>
+#include "lib/util/tevent_ntstatus.h"
#include "../libcli/auth/spnego.h"
#include "librpc/gen_ndr/ndr_dcerpc.h"
#include "auth/credentials/credentials.h"
#include "auth/gensec/gensec_internal.h"
#include "param/param.h"
#include "lib/util/asn1.h"
+#include "lib/util/base64.h"
#undef strcasecmp
-_PUBLIC_ NTSTATUS gensec_spnego_init(void);
+_PUBLIC_ NTSTATUS gensec_spnego_init(TALLOC_CTX *ctx);
enum spnego_state_position {
SPNEGO_SERVER_START,
enum spnego_message_type expected_packet;
enum spnego_state_position state_position;
struct gensec_security *sub_sec_security;
- bool no_response_expected;
+ bool sub_sec_ready;
const char *neg_oid;
DATA_BLOB mech_types;
size_t num_targs;
+ bool downgraded;
bool mic_requested;
bool needs_mic_sign;
bool needs_mic_check;
+ bool may_skip_mic_check;
bool done_mic_check;
+ bool simulate_w2k;
+
/*
* The following is used to implement
* the update token fragmentation
NTSTATUS out_status;
};
+static void gensec_spnego_update_sub_abort(struct spnego_state *spnego_state)
+{
+ spnego_state->sub_sec_ready = false;
+ TALLOC_FREE(spnego_state->sub_sec_security);
+}
static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_security)
{
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
spnego_state->state_position = SPNEGO_CLIENT_START;
spnego_state->sub_sec_security = NULL;
- spnego_state->no_response_expected = false;
- spnego_state->mech_types = data_blob(NULL, 0);
+ spnego_state->sub_sec_ready = false;
+ spnego_state->mech_types = data_blob_null;
spnego_state->out_max_length = gensec_max_update_size(gensec_security);
spnego_state->out_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ spnego_state->simulate_w2k = gensec_setting_bool(gensec_security->settings,
+ "spnego", "simulate_w2k", false);
+
gensec_security->private_data = spnego_state;
return NT_STATUS_OK;
}
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
spnego_state->state_position = SPNEGO_SERVER_START;
spnego_state->sub_sec_security = NULL;
- spnego_state->no_response_expected = false;
- spnego_state->mech_types = data_blob(NULL, 0);
+ spnego_state->sub_sec_ready = false;
+ spnego_state->mech_types = data_blob_null;
spnego_state->out_max_length = gensec_max_update_size(gensec_security);
spnego_state->out_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ spnego_state->simulate_w2k = gensec_setting_bool(gensec_security->settings,
+ "spnego", "simulate_w2k", false);
+
gensec_security->private_data = spnego_state;
return NT_STATUS_OK;
}
-/*
- wrappers for the spnego_*() functions
-*/
-static NTSTATUS gensec_spnego_unseal_packet(struct gensec_security *gensec_security,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- const DATA_BLOB *sig)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_unseal_packet(spnego_state->sub_sec_security,
- data, length,
- whole_pdu, pdu_length,
- sig);
-}
-
-static NTSTATUS gensec_spnego_check_packet(struct gensec_security *gensec_security,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- const DATA_BLOB *sig)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_check_packet(spnego_state->sub_sec_security,
- data, length,
- whole_pdu, pdu_length,
- sig);
-}
-
-static NTSTATUS gensec_spnego_seal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_seal_packet(spnego_state->sub_sec_security,
- mem_ctx,
- data, length,
- whole_pdu, pdu_length,
- sig);
-}
-
-static NTSTATUS gensec_spnego_sign_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_sign_packet(spnego_state->sub_sec_security,
- mem_ctx,
- data, length,
- whole_pdu, pdu_length,
- sig);
-}
-
-static NTSTATUS gensec_spnego_wrap(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const DATA_BLOB *in,
- DATA_BLOB *out)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- DEBUG(1, ("gensec_spnego_wrap: wrong state for wrap\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_wrap(spnego_state->sub_sec_security,
- mem_ctx, in, out);
-}
-
-static NTSTATUS gensec_spnego_unwrap(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const DATA_BLOB *in,
- DATA_BLOB *out)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- DEBUG(1, ("gensec_spnego_unwrap: wrong state for unwrap\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_unwrap(spnego_state->sub_sec_security,
- mem_ctx, in, out);
-}
-
-static size_t gensec_spnego_sig_size(struct gensec_security *gensec_security, size_t data_size)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return 0;
- }
-
- return gensec_sig_size(spnego_state->sub_sec_security, data_size);
-}
-
-static size_t gensec_spnego_max_input_size(struct gensec_security *gensec_security)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return 0;
- }
-
- return gensec_max_input_size(spnego_state->sub_sec_security);
-}
-
-static size_t gensec_spnego_max_wrapped_size(struct gensec_security *gensec_security)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (spnego_state->state_position != SPNEGO_DONE
- && spnego_state->state_position != SPNEGO_FALLBACK) {
- return 0;
- }
-
- return gensec_max_wrapped_size(spnego_state->sub_sec_security);
-}
-
-static NTSTATUS gensec_spnego_session_key(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- DATA_BLOB *session_key)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
- if (!spnego_state->sub_sec_security) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_session_key(spnego_state->sub_sec_security,
- mem_ctx,
- session_key);
-}
-
-static NTSTATUS gensec_spnego_session_info(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- struct auth_session_info **session_info)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
- if (!spnego_state->sub_sec_security) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_session_info(spnego_state->sub_sec_security,
- mem_ctx,
- session_info);
-}
-
/** Fallback to another GENSEC mechanism, based on magic strings
*
* This is the 'fallback' case, where we don't get SPNEGO, and have to
static NTSTATUS gensec_spnego_server_try_fallback(struct gensec_security *gensec_security,
struct spnego_state *spnego_state,
- struct tevent_context *ev,
- TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB in)
{
int i,j;
const struct gensec_security_ops **all_ops;
- all_ops = gensec_security_mechs(gensec_security, out_mem_ctx);
+ all_ops = gensec_security_mechs(gensec_security, mem_ctx);
for (i=0; all_ops && all_ops[i]; i++) {
bool is_spnego;
NTSTATUS nt_status;
- if (gensec_security != NULL &&
- !gensec_security_ops_enabled(all_ops[i], gensec_security))
- continue;
+ if (gensec_security != NULL &&
+ !gensec_security_ops_enabled(all_ops[i], gensec_security))
+ {
+ continue;
+ }
if (!all_ops[i]->oid) {
continue;
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- ev, out_mem_ctx, in, out);
- return nt_status;
+
+ return NT_STATUS_OK;
}
DEBUG(1, ("Failed to parse SPNEGO request\n"));
return NT_STATUS_INVALID_PARAMETER;
}
-/*
- Parse the netTokenInit, either from the client, to the server, or
- from the server to the client.
+/** create a negTokenInit
+ *
+ * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
*/
-
-static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_security,
- struct spnego_state *spnego_state,
- TALLOC_CTX *out_mem_ctx,
- struct tevent_context *ev,
- const char * const *mechType,
- const DATA_BLOB unwrapped_in, DATA_BLOB *unwrapped_out)
+static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
+ struct spnego_state *spnego_state,
+ TALLOC_CTX *out_mem_ctx,
+ struct tevent_context *ev,
+ DATA_BLOB *out)
{
- int i;
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- DATA_BLOB null_data_blob = data_blob(NULL,0);
+ NTSTATUS status;
+ const char **mechTypes = NULL;
+ DATA_BLOB unwrapped_out = data_blob_null;
+ size_t all_idx = 0;
+ const struct gensec_security_ops_wrapper *all_sec;
+ const struct gensec_security_ops_wrapper *cur_sec = NULL;
+ const char **send_mech_types = NULL;
+ struct spnego_data spnego_out;
bool ok;
- const struct gensec_security_ops_wrapper *all_sec
- = gensec_security_by_oid_list(gensec_security,
+ mechTypes = gensec_security_oids(gensec_security,
+ out_mem_ctx, GENSEC_OID_SPNEGO);
+ if (mechTypes == NULL) {
+ DBG_WARNING("gensec_security_oids() failed\n");
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ all_sec = gensec_security_by_oid_list(gensec_security,
out_mem_ctx,
- mechType,
+ mechTypes,
GENSEC_OID_SPNEGO);
+ if (all_sec == NULL) {
+ DBG_WARNING("gensec_security_by_oid_list() failed\n");
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ for (; all_sec[all_idx].op != NULL; all_idx++) {
+ const char *next = NULL;
+ const char *principal = NULL;
+ int dbg_level = DBGLVL_WARNING;
+
+ cur_sec = &all_sec[all_idx];
+
+ status = gensec_subcontext_start(spnego_state,
+ gensec_security,
+ &spnego_state->sub_sec_security);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ /* select the sub context */
+ status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
+ cur_sec->op);
+ if (!NT_STATUS_IS_OK(status)) {
+ gensec_spnego_update_sub_abort(spnego_state);
+ continue;
+ }
+
+ if (spnego_state->state_position != SPNEGO_CLIENT_START) {
+ /*
+ * The server doesn't generate an optimistic token.
+ */
+ goto reply;
+ }
+
+ /* In the client, try and produce the first (optimistic) packet */
+ status = gensec_update_ev(spnego_state->sub_sec_security,
+ out_mem_ctx,
+ ev,
+ data_blob_null,
+ &unwrapped_out);
+ if (NT_STATUS_IS_OK(status)) {
+ spnego_state->sub_sec_ready = true;
+ }
+
+ if (!GENSEC_UPDATE_IS_NTERROR(status)) {
+ goto reply;
+ }
+
+ if (cur_sec[1].op != NULL) {
+ next = cur_sec[1].op->name;
+ dbg_level = DBGLVL_NOTICE;
+ }
+
+ if (gensec_security->target.principal != NULL) {
+ principal = gensec_security->target.principal;
+ } else if (gensec_security->target.service != NULL &&
+ gensec_security->target.hostname != NULL)
+ {
+ principal = talloc_asprintf(spnego_state->sub_sec_security,
+ "%s/%s",
+ gensec_security->target.service,
+ gensec_security->target.hostname);
+ } else {
+ principal = gensec_security->target.hostname;
+ }
+
+ DBG_PREFIX(dbg_level, (
+ "%s: creating NEG_TOKEN_INIT for %s failed "
+ "(next[%s]): %s\n", cur_sec->op->name,
+ principal, next, nt_errstr(status)));
+
+ if (next == NULL) {
+ /*
+ * A hard error without a possible fallback.
+ */
+ return status;
+ }
+
+ /*
+ * Pretend we never started it
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ }
+
+ DBG_WARNING("Failed to setup SPNEGO negTokenInit request\n");
+ return NT_STATUS_INVALID_PARAMETER;
+
+reply:
+ spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
+
+ send_mech_types = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
+ cur_sec);
+ if (send_mech_types == NULL) {
+ DBG_WARNING("gensec_security_oids_from_ops_wrapped() failed\n");
+ return NT_STATUS_NO_MEMORY;
+ }
ok = spnego_write_mech_types(spnego_state,
- mechType,
+ send_mech_types,
&spnego_state->mech_types);
if (!ok) {
- DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
+ DBG_ERR("Failed to write mechTypes\n");
return NT_STATUS_NO_MEMORY;
}
+ /* List the remaining mechs as options */
+ spnego_out.negTokenInit.mechTypes = send_mech_types;
+ spnego_out.negTokenInit.reqFlags = data_blob_null;
+ spnego_out.negTokenInit.reqFlagsPadding = 0;
+
if (spnego_state->state_position == SPNEGO_SERVER_START) {
- uint32_t j;
- for (j=0; mechType && mechType[j]; j++) {
- for (i=0; all_sec && all_sec[i].op; i++) {
- if (strcmp(mechType[j], all_sec[i].oid) != 0) {
- continue;
- }
-
- nt_status = gensec_subcontext_start(spnego_state,
- gensec_security,
- &spnego_state->sub_sec_security);
- if (!NT_STATUS_IS_OK(nt_status)) {
- return nt_status;
- }
- /* select the sub context */
- nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
- all_sec[i].op);
- if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
- break;
- }
-
- if (j > 0) {
- /* no optimistic token */
- spnego_state->neg_oid = all_sec[i].oid;
- *unwrapped_out = data_blob_null;
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
- /*
- * Indicate the downgrade and request a
- * mic.
- */
- spnego_state->mic_requested = true;
- break;
- }
-
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx,
- ev,
- unwrapped_in,
- unwrapped_out);
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
- NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
- /* Pretend we never started it (lets the first run find some incompatible demand) */
-
- DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
- spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
- break;
- }
-
- spnego_state->neg_oid = all_sec[i].oid;
- break;
- }
- if (spnego_state->sub_sec_security) {
- break;
- }
- }
+ spnego_out.negTokenInit.mechListMIC
+ = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
+ } else {
+ spnego_out.negTokenInit.mechListMIC = data_blob_null;
+ }
- if (!spnego_state->sub_sec_security) {
- DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
+ spnego_out.negTokenInit.mechToken = unwrapped_out;
+
+ if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
+ DBG_ERR("Failed to write NEG_TOKEN_INIT\n");
+ return NT_STATUS_INVALID_PARAMETER;
}
- /* Having tried any optimistic token from the client (if we
- * were the server), if we didn't get anywhere, walk our list
- * in our preference order */
+ /*
+ * Note that 'cur_sec' is temporary memory, but
+ * cur_sec->oid points to a const string in the
+ * backends gensec_security_ops structure.
+ */
+ spnego_state->neg_oid = cur_sec->oid;
- if (!spnego_state->sub_sec_security) {
- for (i=0; all_sec && all_sec[i].op; i++) {
- nt_status = gensec_subcontext_start(spnego_state,
- gensec_security,
- &spnego_state->sub_sec_security);
- if (!NT_STATUS_IS_OK(nt_status)) {
- return nt_status;
- }
- /* select the sub context */
- nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
- all_sec[i].op);
- if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
- continue;
- }
+ /* set next state */
+ if (spnego_state->state_position == SPNEGO_SERVER_START) {
+ spnego_state->state_position = SPNEGO_SERVER_START;
+ spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
+ } else {
+ spnego_state->state_position = SPNEGO_CLIENT_TARG;
+ spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
+ }
+
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
- spnego_state->neg_oid = all_sec[i].oid;
+static NTSTATUS gensec_spnego_client_negTokenInit(struct gensec_security *gensec_security,
+ struct spnego_state *spnego_state,
+ struct tevent_context *ev,
+ struct spnego_data *spnego_in,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ DATA_BLOB sub_out = data_blob_null;
+ const char *tp = NULL;
+ const char * const *mech_types = NULL;
+ size_t all_idx = 0;
+ const struct gensec_security_ops_wrapper *all_sec = NULL;
+ struct spnego_data spnego_out;
+ const char *my_mechs[] = {NULL, NULL};
+ NTSTATUS status;
+ bool ok;
- /* only get the helping start blob for the first OID */
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx,
- ev,
- null_data_blob,
- unwrapped_out);
+ *out = data_blob_null;
- /* it is likely that a NULL input token will
- * not be liked by most server mechs, but if
- * we are in the client, we want the first
- * update packet to be able to abort the use
- * of this mech */
- if (spnego_state->state_position != SPNEGO_SERVER_START) {
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
- NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_LOGON_SERVERS) ||
- NT_STATUS_EQUAL(nt_status, NT_STATUS_TIME_DIFFERENCE_AT_DC) ||
- NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
- /* Pretend we never started it (lets the first run find some incompatible demand) */
-
- DEBUG(3, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
- spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
- continue;
- }
- }
+ /* The server offers a list of mechanisms */
- break;
+ tp = spnego_in->negTokenInit.targetPrincipal;
+ if (tp != NULL && strcmp(tp, ADS_IGNORE_PRINCIPAL) != 0) {
+ DBG_INFO("Server claims it's principal name is %s\n", tp);
+ if (lpcfg_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
+ gensec_set_target_principal(gensec_security, tp);
}
}
- if (spnego_state->sub_sec_security) {
- /* it is likely that a NULL input token will
- * not be liked by most server mechs, but this
- * does the right thing in the CIFS client.
- * just push us along the merry-go-round
- * again, and hope for better luck next
- * time */
+ mech_types = spnego_in->negTokenInit.mechTypes;
+ if (mech_types == NULL) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ all_sec = gensec_security_by_oid_list(gensec_security,
+ frame, mech_types,
+ GENSEC_OID_SPNEGO);
+ if (all_sec == NULL) {
+ DBG_WARNING("gensec_security_by_oid_list() failed\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
- *unwrapped_out = data_blob(NULL, 0);
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ for (; all_sec[all_idx].op; all_idx++) {
+ const struct gensec_security_ops_wrapper *cur_sec =
+ &all_sec[all_idx];
+ const char *next = NULL;
+ const char *principal = NULL;
+ int dbg_level = DBGLVL_WARNING;
+ bool allow_fallback = false;
+
+ status = gensec_subcontext_start(spnego_state,
+ gensec_security,
+ &spnego_state->sub_sec_security);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return status;
}
- if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)
- && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
- && !NT_STATUS_IS_OK(nt_status)) {
- DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
- spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
+ /* select the sub context */
+ status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
+ cur_sec->op);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * Pretend we never started it.
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ continue;
+ }
- /* We started the mech correctly, and the
- * input from the other side was valid.
- * Return the error (say bad password, invalid
- * ticket) */
- return nt_status;
+ spnego_state->neg_oid = cur_sec->oid;
+
+ /*
+ * As client we don't use an optimistic token from the server.
+ */
+ status = gensec_update_ev(spnego_state->sub_sec_security,
+ frame, ev, data_blob_null, &sub_out);
+ if (NT_STATUS_IS_OK(status)) {
+ spnego_state->sub_sec_ready = true;
+ }
+
+ if (!GENSEC_UPDATE_IS_NTERROR(status)) {
+ /* OK or MORE_PROCESSING_REQUIRED */
+ goto reply;
+ }
+
+ /*
+ * it is likely that a NULL input token will
+ * not be liked by most server mechs, but if
+ * we are in the client, we want the first
+ * update packet to be able to abort the use
+ * of this mech
+ */
+ if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_NO_LOGON_SERVERS) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_TIME_DIFFERENCE_AT_DC) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO))
+ {
+ allow_fallback = true;
+ }
+
+ if (allow_fallback && cur_sec[1].op != NULL) {
+ next = cur_sec[1].op->name;
+ dbg_level = DBGLVL_NOTICE;
+ }
+
+ if (gensec_security->target.principal != NULL) {
+ principal = gensec_security->target.principal;
+ } else if (gensec_security->target.service != NULL &&
+ gensec_security->target.hostname != NULL)
+ {
+ principal = talloc_asprintf(spnego_state->sub_sec_security,
+ "%s/%s",
+ gensec_security->target.service,
+ gensec_security->target.hostname);
+ } else {
+ principal = gensec_security->target.hostname;
+ }
+
+ DBG_PREFIX(dbg_level, (
+ "%s: creating NEG_TOKEN_INIT "
+ "for %s failed (next[%s]): %s\n",
+ spnego_state->sub_sec_security->ops->name,
+ principal, next, nt_errstr(status)));
+
+ if (next == NULL) {
+ /*
+ * A hard error without a possible fallback.
+ */
+ TALLOC_FREE(frame);
+ return status;
}
- return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
+ /*
+ * Pretend we never started it.
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
}
- DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
- /* we could re-negotiate here, but it would only work
- * if the client or server lied about what it could
- * support the first time. Lets keep this code to
- * reality */
+ DBG_WARNING("Could not find a suitable mechtype in NEG_TOKEN_INIT\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
- return nt_status;
+ reply:
+ my_mechs[0] = spnego_state->neg_oid;
+ /* compose reply */
+ spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
+ spnego_out.negTokenInit.mechTypes = my_mechs;
+ spnego_out.negTokenInit.reqFlags = data_blob_null;
+ spnego_out.negTokenInit.reqFlagsPadding = 0;
+ spnego_out.negTokenInit.mechListMIC = data_blob_null;
+ spnego_out.negTokenInit.mechToken = sub_out;
+
+ if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
+ DBG_ERR("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ok = spnego_write_mech_types(spnego_state,
+ my_mechs,
+ &spnego_state->mech_types);
+ if (!ok) {
+ DBG_ERR("failed to write mechTypes\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* set next state */
+ spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
+ spnego_state->state_position = SPNEGO_CLIENT_TARG;
+
+ TALLOC_FREE(frame);
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
-/** create a negTokenInit
- *
- * This is the same packet, no matter if the client or server sends it first, but it is always the first packet
-*/
-static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec_security,
+static NTSTATUS gensec_spnego_client_negTokenTarg(struct gensec_security *gensec_security,
struct spnego_state *spnego_state,
- TALLOC_CTX *out_mem_ctx,
struct tevent_context *ev,
- const DATA_BLOB in, DATA_BLOB *out)
+ struct spnego_data *spnego_in,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
{
- int i;
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- DATA_BLOB null_data_blob = data_blob(NULL,0);
- const char **mechTypes = NULL;
- DATA_BLOB unwrapped_out = data_blob(NULL, 0);
- const struct gensec_security_ops_wrapper *all_sec;
+ struct spnego_negTokenTarg *ta = &spnego_in->negTokenTarg;
+ DATA_BLOB sub_in = ta->responseToken;
+ DATA_BLOB mech_list_mic = data_blob_null;
+ DATA_BLOB sub_out = data_blob_null;
+ struct spnego_data spnego_out;
+ NTSTATUS status;
- mechTypes = gensec_security_oids(gensec_security,
- out_mem_ctx, GENSEC_OID_SPNEGO);
+ *out = data_blob_null;
- all_sec = gensec_security_by_oid_list(gensec_security,
- out_mem_ctx,
- mechTypes,
- GENSEC_OID_SPNEGO);
- for (i=0; all_sec && all_sec[i].op; i++) {
- struct spnego_data spnego_out;
- const char **send_mech_types;
- bool ok;
+ spnego_state->num_targs++;
- nt_status = gensec_subcontext_start(spnego_state,
- gensec_security,
- &spnego_state->sub_sec_security);
- if (!NT_STATUS_IS_OK(nt_status)) {
- return nt_status;
+ if (ta->negResult == SPNEGO_REJECT) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ if (ta->negResult == SPNEGO_REQUEST_MIC) {
+ spnego_state->mic_requested = true;
+ }
+
+ if (ta->mechListMIC.length > 0) {
+ DATA_BLOB *m = &ta->mechListMIC;
+ const DATA_BLOB *r = &ta->responseToken;
+
+ /*
+ * Windows 2000 has a bug, it repeats the
+ * responseToken in the mechListMIC field.
+ */
+ if (m->length == r->length) {
+ int cmp;
+
+ cmp = memcmp(m->data, r->data, m->length);
+ if (cmp == 0) {
+ data_blob_free(m);
+ }
}
+ }
+
+ /* Server didn't like our choice of mech, and chose something else */
+ if (((ta->negResult == SPNEGO_ACCEPT_INCOMPLETE) ||
+ (ta->negResult == SPNEGO_REQUEST_MIC)) &&
+ ta->supportedMech != NULL &&
+ strcmp(ta->supportedMech, spnego_state->neg_oid) != 0)
+ {
+ const char *client_mech = NULL;
+ const char *client_oid = NULL;
+ const char *server_mech = NULL;
+ const char *server_oid = NULL;
+
+ client_mech = gensec_get_name_by_oid(gensec_security,
+ spnego_state->neg_oid);
+ client_oid = spnego_state->neg_oid;
+ server_mech = gensec_get_name_by_oid(gensec_security,
+ ta->supportedMech);
+ server_oid = ta->supportedMech;
+
+ DBG_NOTICE("client preferred mech (%s[%s]) not accepted, "
+ "server wants: %s[%s]\n",
+ client_mech, client_oid, server_mech, server_oid);
+
+ spnego_state->downgraded = true;
+ gensec_spnego_update_sub_abort(spnego_state);
+
+ status = gensec_subcontext_start(spnego_state,
+ gensec_security,
+ &spnego_state->sub_sec_security);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
/* select the sub context */
- nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
- all_sec[i].op);
- if (!NT_STATUS_IS_OK(nt_status)) {
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
- continue;
+ status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
+ ta->supportedMech);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
- /* In the client, try and produce the first (optimistic) packet */
- if (spnego_state->state_position == SPNEGO_CLIENT_START) {
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx,
- ev,
- null_data_blob,
- &unwrapped_out);
-
- if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
- && !NT_STATUS_IS_OK(nt_status)) {
- DEBUG(1, ("SPNEGO(%s) creating NEG_TOKEN_INIT failed: %s\n",
- spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
- /* Pretend we never started it (lets the first run find some incompatible demand) */
-
- continue;
- }
+ spnego_state->neg_oid = talloc_strdup(spnego_state,
+ ta->supportedMech);
+ if (spnego_state->neg_oid == NULL) {
+ return NT_STATUS_NO_MEMORY;
}
+ }
- spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
+ if (ta->mechListMIC.length > 0) {
+ if (spnego_state->sub_sec_ready) {
+ spnego_state->needs_mic_check = true;
+ }
+ }
- send_mech_types = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
- &all_sec[i]);
+ if (spnego_state->needs_mic_check) {
+ if (ta->responseToken.length != 0) {
+ DBG_WARNING("non empty response token not expected\n");
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- ok = spnego_write_mech_types(spnego_state,
- send_mech_types,
- &spnego_state->mech_types);
- if (!ok) {
- DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
- return NT_STATUS_NO_MEMORY;
+ if (ta->mechListMIC.length == 0
+ && spnego_state->may_skip_mic_check) {
+ /*
+ * In this case we don't require
+ * a mechListMIC from the server.
+ *
+ * This works around bugs in the Azure
+ * and Apple spnego implementations.
+ *
+ * See
+ * https://bugzilla.samba.org/show_bug.cgi?id=11994
+ */
+ spnego_state->needs_mic_check = false;
+ status = NT_STATUS_OK;
+ goto client_response;
}
- /* List the remaining mechs as options */
- spnego_out.negTokenInit.mechTypes = send_mech_types;
- spnego_out.negTokenInit.reqFlags = null_data_blob;
- spnego_out.negTokenInit.reqFlagsPadding = 0;
+ status = gensec_check_packet(spnego_state->sub_sec_security,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ &ta->mechListMIC);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_WARNING("failed to verify mechListMIC: %s\n",
+ nt_errstr(status));
+ return status;
+ }
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ goto client_response;
+ }
- if (spnego_state->state_position == SPNEGO_SERVER_START) {
- spnego_out.negTokenInit.mechListMIC
- = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
- } else {
- spnego_out.negTokenInit.mechListMIC = null_data_blob;
+ if (!spnego_state->sub_sec_ready) {
+ status = gensec_update_ev(spnego_state->sub_sec_security,
+ out_mem_ctx, ev,
+ sub_in,
+ &sub_out);
+ if (NT_STATUS_IS_OK(status)) {
+ spnego_state->sub_sec_ready = true;
}
+ if (!NT_STATUS_IS_OK(status)) {
+ goto client_response;
+ }
+ } else {
+ status = NT_STATUS_OK;
+ }
+
+ if (!spnego_state->done_mic_check) {
+ bool have_sign = true;
+ bool new_spnego = false;
+
+ have_sign = gensec_have_feature(spnego_state->sub_sec_security,
+ GENSEC_FEATURE_SIGN);
+ if (spnego_state->simulate_w2k) {
+ have_sign = false;
+ }
+ new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
+ GENSEC_FEATURE_NEW_SPNEGO);
+
+ switch (ta->negResult) {
+ case SPNEGO_ACCEPT_COMPLETED:
+ case SPNEGO_NONE_RESULT:
+ if (spnego_state->num_targs == 1) {
+ /*
+ * the first exchange doesn't require
+ * verification
+ */
+ new_spnego = false;
+ }
+
+ break;
+
+ case SPNEGO_ACCEPT_INCOMPLETE:
+ if (ta->mechListMIC.length > 0) {
+ new_spnego = true;
+ break;
+ }
+
+ if (spnego_state->downgraded) {
+ /*
+ * A downgrade should be protected if
+ * supported
+ */
+ break;
+ }
+
+ /*
+ * The caller may just asked for
+ * GENSEC_FEATURE_SESSION_KEY, this
+ * is only reflected in the want_features.
+ *
+ * As it will imply
+ * gensec_have_features(GENSEC_FEATURE_SIGN)
+ * to return true.
+ */
+ if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+ break;
+ }
+ if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+ break;
+ }
+ /*
+ * Here we're sure our preferred mech was
+ * selected by the server and our caller doesn't
+ * need GENSEC_FEATURE_SIGN nor
+ * GENSEC_FEATURE_SEAL support.
+ *
+ * In this case we don't require
+ * a mechListMIC from the server.
+ *
+ * This works around bugs in the Azure
+ * and Apple spnego implementations.
+ *
+ * See
+ * https://bugzilla.samba.org/show_bug.cgi?id=11994
+ */
+ spnego_state->may_skip_mic_check = true;
+ break;
- spnego_out.negTokenInit.mechToken = unwrapped_out;
+ case SPNEGO_REQUEST_MIC:
+ if (ta->mechListMIC.length > 0) {
+ new_spnego = true;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (spnego_state->mic_requested) {
+ if (have_sign) {
+ new_spnego = true;
+ }
+ }
+
+ if (have_sign && new_spnego) {
+ spnego_state->needs_mic_check = true;
+ spnego_state->needs_mic_sign = true;
+ }
+ }
+
+ if (ta->mechListMIC.length > 0) {
+ status = gensec_check_packet(spnego_state->sub_sec_security,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ &ta->mechListMIC);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_WARNING("failed to verify mechListMIC: %s\n",
+ nt_errstr(status));
+ return status;
+ }
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ }
+
+ if (spnego_state->needs_mic_sign) {
+ status = gensec_sign_packet(spnego_state->sub_sec_security,
+ out_mem_ctx,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ &mech_list_mic);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_WARNING("failed to sign mechListMIC: %s\n",
+ nt_errstr(status));
+ return status;
+ }
+ spnego_state->needs_mic_sign = false;
+ }
+
+ if (spnego_state->needs_mic_check) {
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
+
+ client_response:
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ DBG_WARNING("SPNEGO(%s) login failed: %s\n",
+ spnego_state->sub_sec_security->ops->name,
+ nt_errstr(status));
+ return status;
+ }
+
+ if (sub_out.length || mech_list_mic.length) {
+ /* compose reply */
+ spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
+ spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
+ spnego_out.negTokenTarg.supportedMech = NULL;
+ spnego_out.negTokenTarg.responseToken = sub_out;
+ spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
- DEBUG(1, ("Failed to write NEG_TOKEN_INIT\n"));
- return NT_STATUS_INVALID_PARAMETER;
+ DBG_WARNING("Failed to write NEG_TOKEN_TARG\n");
+ return NT_STATUS_INVALID_PARAMETER;
}
- /* set next state */
- spnego_state->neg_oid = all_sec[i].oid;
+ spnego_state->num_targs++;
+ spnego_state->state_position = SPNEGO_CLIENT_TARG;
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else {
+
+ /* all done - server has accepted, and we agree */
+ *out = data_blob_null;
- if (NT_STATUS_IS_OK(nt_status)) {
- spnego_state->no_response_expected = true;
+ if (ta->negResult != SPNEGO_ACCEPT_COMPLETED) {
+ /* unless of course it did not accept */
+ DBG_WARNING("gensec_update ok but not accepted\n");
+ status = NT_STATUS_INVALID_PARAMETER;
}
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
- }
- talloc_free(spnego_state->sub_sec_security);
- spnego_state->sub_sec_security = NULL;
+ spnego_state->state_position = SPNEGO_DONE;
+ }
- DEBUG(10, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
- return nt_status;
+ return status;
}
-
/** create a server negTokenTarg
*
* This is the case, where the client is the first one who sends data
*/
-static NTSTATUS gensec_spnego_server_negTokenTarg(struct spnego_state *spnego_state,
- TALLOC_CTX *out_mem_ctx,
- NTSTATUS nt_status,
- const DATA_BLOB unwrapped_out,
- DATA_BLOB mech_list_mic,
- DATA_BLOB *out)
+static NTSTATUS gensec_spnego_server_response(struct spnego_state *spnego_state,
+ TALLOC_CTX *out_mem_ctx,
+ NTSTATUS nt_status,
+ const DATA_BLOB unwrapped_out,
+ DATA_BLOB mech_list_mic,
+ DATA_BLOB *out)
{
struct spnego_data spnego_out;
- DATA_BLOB null_data_blob = data_blob(NULL, 0);
/* compose reply */
spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
spnego_state->state_position = SPNEGO_DONE;
} else {
spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
- spnego_out.negTokenTarg.mechListMIC = null_data_blob;
+ spnego_out.negTokenTarg.mechListMIC = data_blob_null;
DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
spnego_state->state_position = SPNEGO_DONE;
}
return nt_status;
}
-
-static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
- struct tevent_context *ev,
- const DATA_BLOB in, DATA_BLOB *out)
+static NTSTATUS gensec_spnego_server_negTokenInit(struct gensec_security *gensec_security,
+ struct spnego_state *spnego_state,
+ struct tevent_context *ev,
+ struct spnego_data *spnego_in,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
- DATA_BLOB null_data_blob = data_blob(NULL, 0);
- DATA_BLOB mech_list_mic = data_blob(NULL, 0);
- DATA_BLOB unwrapped_out = data_blob(NULL, 0);
- struct spnego_data spnego_out;
- struct spnego_data spnego;
-
- ssize_t len;
-
- *out = data_blob(NULL, 0);
+ TALLOC_CTX *frame = talloc_stackframe();
+ DATA_BLOB sub_out = data_blob_null;
+ DATA_BLOB mech_list_mic = data_blob_null;
+ const char * const *mech_types = NULL;
+ size_t all_idx = 0;
+ const struct gensec_security_ops_wrapper *all_sec = NULL;
+ size_t mech_idx = 0;
+ NTSTATUS status;
+ bool ok;
- if (!out_mem_ctx) {
- out_mem_ctx = spnego_state;
+ mech_types = spnego_in->negTokenInit.mechTypes;
+ if (mech_types == NULL) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
}
- /* and switch into the state machine */
+ all_sec = gensec_security_by_oid_list(gensec_security, frame,
+ mech_types, GENSEC_OID_SPNEGO);
+ if (all_sec == NULL) {
+ DBG_WARNING("gensec_security_by_oid_list() failed\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- switch (spnego_state->state_position) {
- case SPNEGO_FALLBACK:
- return gensec_update_ev(spnego_state->sub_sec_security, ev,
- out_mem_ctx, in, out);
- case SPNEGO_SERVER_START:
- {
- NTSTATUS nt_status;
- if (in.length) {
+ ok = spnego_write_mech_types(spnego_state, mech_types,
+ &spnego_state->mech_types);
+ if (!ok) {
+ DBG_ERR("Failed to write mechTypes\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_NO_MEMORY;
+ }
- len = spnego_read_data(gensec_security, in, &spnego);
- if (len == -1) {
- return gensec_spnego_server_try_fallback(gensec_security, spnego_state,
- ev, out_mem_ctx, in, out);
- }
- /* client sent NegTargetInit, we send NegTokenTarg */
-
- /* OK, so it's real SPNEGO, check the packet's the one we expect */
- if (spnego.type != spnego_state->expected_packet) {
- DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
- spnego_state->expected_packet));
- dump_data(1, in.data, in.length);
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
+ /*
+ * First try the preferred mechs from the client.
+ */
+ for (; mech_types[mech_idx]; mech_idx++) {
+ const char *cur_mech = mech_types[mech_idx];
+ const struct gensec_security_ops_wrapper *cur_sec = NULL;
+ DATA_BLOB sub_in = data_blob_null;
+
+ for (all_idx = 0; all_sec[all_idx].op; all_idx++) {
+ if (strcmp(cur_mech, all_sec[all_idx].oid) == 0) {
+ cur_sec = &all_sec[all_idx];
+ break;
}
-
- nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
- spnego_state,
- out_mem_ctx,
- ev,
- spnego.negTokenInit.mechTypes,
- spnego.negTokenInit.mechToken,
- &unwrapped_out);
-
- nt_status = gensec_spnego_server_negTokenTarg(spnego_state,
- out_mem_ctx,
- nt_status,
- unwrapped_out,
- null_data_blob,
- out);
-
- spnego_free_data(&spnego);
-
- return nt_status;
- } else {
- nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
- out_mem_ctx, ev, in, out);
- spnego_state->state_position = SPNEGO_SERVER_START;
- spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
- return nt_status;
}
- }
- case SPNEGO_CLIENT_START:
- {
- /* The server offers a list of mechanisms */
-
- const char *my_mechs[] = {NULL, NULL};
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- bool ok;
-
- if (!in.length) {
- /* client to produce negTokenInit */
- nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
- out_mem_ctx, ev, in, out);
- spnego_state->state_position = SPNEGO_CLIENT_TARG;
- spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
- return nt_status;
+ if (cur_sec == NULL) {
+ continue;
}
- len = spnego_read_data(gensec_security, in, &spnego);
-
- if (len == -1) {
- DEBUG(1, ("Invalid SPNEGO request:\n"));
- dump_data(1, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
+ status = gensec_subcontext_start(spnego_state,
+ gensec_security,
+ &spnego_state->sub_sec_security);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return status;
}
- /* OK, so it's real SPNEGO, check the packet's the one we expect */
- if (spnego.type != spnego_state->expected_packet) {
- DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
- spnego_state->expected_packet));
- dump_data(1, in.data, in.length);
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
+ /* select the sub context */
+ status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
+ cur_sec->op);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * Pretend we never started it
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ continue;
}
- if (spnego.negTokenInit.targetPrincipal
- && strcmp(spnego.negTokenInit.targetPrincipal, ADS_IGNORE_PRINCIPAL) != 0) {
- DEBUG(5, ("Server claims it's principal name is %s\n", spnego.negTokenInit.targetPrincipal));
- if (lpcfg_client_use_spnego_principal(gensec_security->settings->lp_ctx)) {
- gensec_set_target_principal(gensec_security, spnego.negTokenInit.targetPrincipal);
- }
+ if (mech_idx > 0) {
+ /*
+ * Indicate the downgrade and request a
+ * mic.
+ */
+ spnego_state->downgraded = true;
+ spnego_state->mic_requested = true;
+ /* no optimistic token */
+ spnego_state->neg_oid = cur_sec->oid;
+ sub_out = data_blob_null;
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ goto reply;
}
- nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
- spnego_state,
- out_mem_ctx,
- ev,
- spnego.negTokenInit.mechTypes,
- spnego.negTokenInit.mechToken,
- &unwrapped_out);
-
- if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
- spnego_free_data(&spnego);
- return nt_status;
+ /*
+ * Try the optimistic token from the client
+ */
+ sub_in = spnego_in->negTokenInit.mechToken;
+ status = gensec_update_ev(spnego_state->sub_sec_security,
+ frame, ev, sub_in, &sub_out);
+ if (NT_STATUS_IS_OK(status)) {
+ spnego_state->sub_sec_ready = true;
}
+ if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
- my_mechs[0] = spnego_state->neg_oid;
- /* compose reply */
- spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
- spnego_out.negTokenInit.mechTypes = my_mechs;
- spnego_out.negTokenInit.reqFlags = null_data_blob;
- spnego_out.negTokenInit.reqFlagsPadding = 0;
- spnego_out.negTokenInit.mechListMIC = null_data_blob;
- spnego_out.negTokenInit.mechToken = unwrapped_out;
+ DBG_WARNING("%s: NEG_TOKEN_INIT failed to parse contents: %s\n",
+ cur_sec->op->name, nt_errstr(status));
- if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
- DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_INIT\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- ok = spnego_write_mech_types(spnego_state,
- my_mechs,
- &spnego_state->mech_types);
- if (!ok) {
- DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
- return NT_STATUS_NO_MEMORY;
+ /*
+ * Pretend we never started it
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ continue;
}
- /* set next state */
- spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
- spnego_state->state_position = SPNEGO_CLIENT_TARG;
-
- if (NT_STATUS_IS_OK(nt_status)) {
- spnego_state->no_response_expected = true;
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ DBG_WARNING("%s: NEG_TOKEN_INIT failed: %s\n",
+ cur_sec->op->name, nt_errstr(status));
+ goto reply;
}
- spnego_free_data(&spnego);
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ spnego_state->neg_oid = cur_sec->oid;
+ goto reply; /* OK or MORE PROCESSING */
}
- case SPNEGO_SERVER_TARG:
- {
- NTSTATUS nt_status;
- bool new_spnego = false;
-
- if (!in.length) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- len = spnego_read_data(gensec_security, in, &spnego);
- if (len == -1) {
- DEBUG(1, ("Invalid SPNEGO request:\n"));
- dump_data(1, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- /* OK, so it's real SPNEGO, check the packet's the one we expect */
- if (spnego.type != spnego_state->expected_packet) {
- DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
- spnego_state->expected_packet));
- dump_data(1, in.data, in.length);
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
- }
+ DBG_WARNING("Could not find a suitable mechtype in NEG_TOKEN_INIT\n");
+ status = NT_STATUS_INVALID_PARAMETER;
- spnego_state->num_targs++;
-
- if (!spnego_state->sub_sec_security) {
- DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
- }
+ reply:
+ if (spnego_state->simulate_w2k) {
+ /*
+ * Windows 2000 returns the unwrapped token
+ * also in the mech_list_mic field.
+ *
+ * In order to verify our client code,
+ * we need a way to have a server with this
+ * broken behaviour
+ */
+ mech_list_mic = sub_out;
+ }
- if (spnego_state->needs_mic_check) {
- if (spnego.negTokenTarg.responseToken.length != 0) {
- DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
- }
+ status = gensec_spnego_server_response(spnego_state,
+ out_mem_ctx,
+ status,
+ sub_out,
+ mech_list_mic,
+ out);
+ TALLOC_FREE(frame);
+ return status;
+}
- nt_status = gensec_check_packet(spnego_state->sub_sec_security,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- &spnego.negTokenTarg.mechListMIC);
- if (NT_STATUS_IS_OK(nt_status)) {
- spnego_state->needs_mic_check = false;
- spnego_state->done_mic_check = true;
- } else {
- DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
- nt_errstr(nt_status)));
- }
- goto server_response;
- }
+static NTSTATUS gensec_spnego_server_negTokenTarg(struct gensec_security *gensec_security,
+ struct spnego_state *spnego_state,
+ struct tevent_context *ev,
+ struct spnego_data *spnego_in,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
+{
+ const struct spnego_negTokenTarg *ta = &spnego_in->negTokenTarg;
+ DATA_BLOB sub_in = ta->responseToken;
+ DATA_BLOB mech_list_mic = data_blob_null;
+ DATA_BLOB sub_out = data_blob_null;
+ NTSTATUS status;
+ bool have_sign = true;
+ bool new_spnego = false;
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx, ev,
- spnego.negTokenTarg.responseToken,
- &unwrapped_out);
- if (!NT_STATUS_IS_OK(nt_status)) {
- goto server_response;
- }
+ spnego_state->num_targs++;
- new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
- GENSEC_FEATURE_NEW_SPNEGO);
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- new_spnego = true;
+ if (spnego_state->sub_sec_security == NULL) {
+ DBG_ERR("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n");
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (spnego_state->needs_mic_check) {
+ if (ta->responseToken.length != 0) {
+ DBG_WARNING("non empty response token not expected\n");
+ return NT_STATUS_INVALID_PARAMETER;
}
- if (new_spnego) {
- spnego_state->needs_mic_check = true;
- spnego_state->needs_mic_sign = true;
+ status = gensec_check_packet(spnego_state->sub_sec_security,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ &ta->mechListMIC);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_WARNING("failed to verify mechListMIC: %s\n",
+ nt_errstr(status));
+ goto server_response;
}
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- nt_status = gensec_check_packet(spnego_state->sub_sec_security,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- &spnego.negTokenTarg.mechListMIC);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
- nt_errstr(nt_status)));
- goto server_response;
- }
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ goto server_response;
+ }
- spnego_state->needs_mic_check = false;
- spnego_state->done_mic_check = true;
- }
-
- if (spnego_state->needs_mic_sign) {
- nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
- out_mem_ctx,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- &mech_list_mic);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
- nt_errstr(nt_status)));
- goto server_response;
- }
- spnego_state->needs_mic_sign = false;
+ if (!spnego_state->sub_sec_ready) {
+ status = gensec_update_ev(spnego_state->sub_sec_security,
+ out_mem_ctx, ev,
+ sub_in, &sub_out);
+ if (NT_STATUS_IS_OK(status)) {
+ spnego_state->sub_sec_ready = true;
}
-
- if (spnego_state->needs_mic_check) {
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ if (!NT_STATUS_IS_OK(status)) {
+ goto server_response;
}
+ } else {
+ status = NT_STATUS_OK;
+ }
- server_response:
- nt_status = gensec_spnego_server_negTokenTarg(spnego_state,
- out_mem_ctx,
- nt_status,
- unwrapped_out,
- mech_list_mic,
- out);
-
- spnego_free_data(&spnego);
+ have_sign = gensec_have_feature(spnego_state->sub_sec_security,
+ GENSEC_FEATURE_SIGN);
+ if (spnego_state->simulate_w2k) {
+ have_sign = false;
+ }
+ new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
+ GENSEC_FEATURE_NEW_SPNEGO);
+ if (ta->mechListMIC.length > 0) {
+ new_spnego = true;
+ }
- return nt_status;
+ if (have_sign && new_spnego) {
+ spnego_state->needs_mic_check = true;
+ spnego_state->needs_mic_sign = true;
}
- case SPNEGO_CLIENT_TARG:
- {
- NTSTATUS nt_status = NT_STATUS_INTERNAL_ERROR;
- if (!in.length) {
- return NT_STATUS_INVALID_PARAMETER;
+ if (have_sign && ta->mechListMIC.length > 0) {
+ status = gensec_check_packet(spnego_state->sub_sec_security,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ &ta->mechListMIC);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_WARNING("failed to verify mechListMIC: %s\n",
+ nt_errstr(status));
+ goto server_response;
}
- len = spnego_read_data(gensec_security, in, &spnego);
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ }
- if (len == -1) {
- DEBUG(1, ("Invalid SPNEGO request:\n"));
- dump_data(1, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
+ if (spnego_state->needs_mic_sign) {
+ status = gensec_sign_packet(spnego_state->sub_sec_security,
+ out_mem_ctx,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ spnego_state->mech_types.data,
+ spnego_state->mech_types.length,
+ &mech_list_mic);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_WARNING("failed to sign mechListMIC: %s\n",
+ nt_errstr(status));
+ return status;
}
+ spnego_state->needs_mic_sign = false;
+ }
- /* OK, so it's real SPNEGO, check the packet's the one we expect */
- if (spnego.type != spnego_state->expected_packet) {
- DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n", spnego.type,
- spnego_state->expected_packet));
- dump_data(1, in.data, in.length);
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
- }
+ if (spnego_state->needs_mic_check) {
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
- spnego_state->num_targs++;
+ server_response:
+ return gensec_spnego_server_response(spnego_state,
+ out_mem_ctx,
+ status,
+ sub_out,
+ mech_list_mic,
+ out);
+}
- if (spnego.negTokenTarg.negResult == SPNEGO_REJECT) {
- spnego_free_data(&spnego);
- return NT_STATUS_LOGON_FAILURE;
- }
+struct gensec_spnego_update_state {
+ struct tevent_context *ev;
+ struct gensec_security *gensec;
+ struct spnego_state *spnego;
- if (spnego.negTokenTarg.negResult == SPNEGO_REQUEST_MIC) {
- spnego_state->mic_requested = true;
- }
+ DATA_BLOB full_in;
+ struct spnego_data _spnego_in;
+ struct spnego_data *spnego_in;
- /* Server didn't like our choice of mech, and chose something else */
- if (((spnego.negTokenTarg.negResult == SPNEGO_ACCEPT_INCOMPLETE) ||
- (spnego.negTokenTarg.negResult == SPNEGO_REQUEST_MIC)) &&
- spnego.negTokenTarg.supportedMech &&
- strcmp(spnego.negTokenTarg.supportedMech, spnego_state->neg_oid) != 0) {
- DEBUG(3,("GENSEC SPNEGO: client preferred mech (%s) not accepted, server wants: %s\n",
- gensec_get_name_by_oid(gensec_security, spnego_state->neg_oid),
- gensec_get_name_by_oid(gensec_security, spnego.negTokenTarg.supportedMech)));
-
- spnego_state->no_response_expected = false;
- talloc_free(spnego_state->sub_sec_security);
- nt_status = gensec_subcontext_start(spnego_state,
- gensec_security,
- &spnego_state->sub_sec_security);
- if (!NT_STATUS_IS_OK(nt_status)) {
- spnego_free_data(&spnego);
- return nt_status;
- }
- /* select the sub context */
- nt_status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
- spnego.negTokenTarg.supportedMech);
- if (!NT_STATUS_IS_OK(nt_status)) {
- spnego_free_data(&spnego);
- return nt_status;
- }
+ struct {
+ bool needed;
+ DATA_BLOB in;
+ NTSTATUS status;
+ DATA_BLOB out;
+ } sub;
- spnego_state->neg_oid = talloc_strdup(spnego_state,
- spnego.negTokenTarg.supportedMech);
- if (spnego_state->neg_oid == NULL) {
- spnego_free_data(&spnego);
- return NT_STATUS_NO_MEMORY;
- };
- }
+ NTSTATUS status;
+ DATA_BLOB out;
+};
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- DATA_BLOB *m = &spnego.negTokenTarg.mechListMIC;
- const DATA_BLOB *r = &spnego.negTokenTarg.responseToken;
+static void gensec_spnego_update_cleanup(struct tevent_req *req,
+ enum tevent_req_state req_state)
+{
+ struct gensec_spnego_update_state *state =
+ tevent_req_data(req,
+ struct gensec_spnego_update_state);
+
+ switch (req_state) {
+ case TEVENT_REQ_USER_ERROR:
+ case TEVENT_REQ_TIMED_OUT:
+ case TEVENT_REQ_NO_MEMORY:
+ /*
+ * A fatal error, further updates are not allowed.
+ */
+ state->spnego->state_position = SPNEGO_DONE;
+ break;
+ default:
+ break;
+ }
+}
- /*
- * Windows 2000 has a bug, it repeats the
- * responseToken in the mechListMIC field.
- */
- if (m->length == r->length) {
- int cmp;
+static NTSTATUS gensec_spnego_update_in(struct gensec_security *gensec_security,
+ const DATA_BLOB in, TALLOC_CTX *mem_ctx,
+ DATA_BLOB *full_in);
+static void gensec_spnego_update_pre(struct tevent_req *req);
+static void gensec_spnego_update_done(struct tevent_req *subreq);
+static void gensec_spnego_update_post(struct tevent_req *req);
+static NTSTATUS gensec_spnego_update_out(struct gensec_security *gensec_security,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *_out);
- cmp = memcmp(m->data, r->data, m->length);
- if (cmp == 0) {
- data_blob_free(m);
- }
- }
- }
+static struct tevent_req *gensec_spnego_update_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct gensec_security *gensec_security,
+ const DATA_BLOB in)
+{
+ struct spnego_state *spnego_state =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct spnego_state);
+ struct tevent_req *req = NULL;
+ struct gensec_spnego_update_state *state = NULL;
+ NTSTATUS status;
+ ssize_t len;
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- if (spnego_state->no_response_expected) {
- spnego_state->needs_mic_check = true;
- }
- }
+ req = tevent_req_create(mem_ctx, &state,
+ struct gensec_spnego_update_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->ev = ev;
+ state->gensec = gensec_security;
+ state->spnego = spnego_state;
+ tevent_req_set_cleanup_fn(req, gensec_spnego_update_cleanup);
- if (spnego_state->needs_mic_check) {
- if (spnego.negTokenTarg.responseToken.length != 0) {
- DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
- spnego_free_data(&spnego);
- return NT_STATUS_INVALID_PARAMETER;
- }
+ if (spnego_state->out_frag.length > 0) {
+ if (in.length > 0) {
+ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
+ }
- nt_status = gensec_check_packet(spnego_state->sub_sec_security,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- &spnego.negTokenTarg.mechListMIC);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
- nt_errstr(nt_status)));
- spnego_free_data(&spnego);
- return nt_status;
- }
- spnego_state->needs_mic_check = false;
- spnego_state->done_mic_check = true;
- goto client_response;
+ status = gensec_spnego_update_out(gensec_security,
+ state, &state->out);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
}
- if (!spnego_state->no_response_expected) {
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx, ev,
- spnego.negTokenTarg.responseToken,
- &unwrapped_out);
- if (!NT_STATUS_IS_OK(nt_status)) {
- goto client_response;
- }
+ state->status = status;
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+ }
- spnego_state->no_response_expected = true;
- } else {
- nt_status = NT_STATUS_OK;
- }
+ status = gensec_spnego_update_in(gensec_security, in,
+ state, &state->full_in);
+ state->status = status;
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+ }
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
- if (spnego_state->no_response_expected &&
- !spnego_state->done_mic_check)
- {
- bool new_spnego = false;
-
- new_spnego = gensec_have_feature(spnego_state->sub_sec_security,
- GENSEC_FEATURE_NEW_SPNEGO);
-
- switch (spnego.negTokenTarg.negResult) {
- case SPNEGO_ACCEPT_COMPLETED:
- case SPNEGO_NONE_RESULT:
- if (spnego_state->num_targs == 1) {
- /*
- * the first exchange doesn't require
- * verification
- */
- new_spnego = false;
- }
- break;
+ /* Check if we got a valid SPNEGO blob... */
- case SPNEGO_ACCEPT_INCOMPLETE:
- case SPNEGO_REQUEST_MIC:
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- new_spnego = true;
- }
- break;
- default:
- break;
- }
+ switch (spnego_state->state_position) {
+ case SPNEGO_FALLBACK:
+ break;
- if (spnego_state->mic_requested) {
- bool sign;
+ case SPNEGO_CLIENT_TARG:
+ case SPNEGO_SERVER_TARG:
+ if (state->full_in.length == 0) {
+ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
+ }
- sign = gensec_have_feature(spnego_state->sub_sec_security,
- GENSEC_FEATURE_SIGN);
- if (sign) {
- new_spnego = true;
- }
- }
+ /* fall through */
+ case SPNEGO_CLIENT_START:
+ case SPNEGO_SERVER_START:
- if (new_spnego) {
- spnego_state->needs_mic_check = true;
- spnego_state->needs_mic_sign = true;
- }
+ if (state->full_in.length == 0) {
+ /* create_negTokenInit later */
+ break;
}
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- nt_status = gensec_check_packet(spnego_state->sub_sec_security,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- &spnego.negTokenTarg.mechListMIC);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(2,("GENSEC SPNEGO: failed to verify mechListMIC: %s\n",
- nt_errstr(nt_status)));
- spnego_free_data(&spnego);
- return nt_status;
+ len = spnego_read_data(state,
+ state->full_in,
+ &state->_spnego_in);
+ if (len == -1) {
+ if (spnego_state->state_position != SPNEGO_SERVER_START) {
+ DEBUG(1, ("Invalid SPNEGO request:\n"));
+ dump_data(1, state->full_in.data,
+ state->full_in.length);
+ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
}
- spnego_state->needs_mic_check = false;
- spnego_state->done_mic_check = true;
- }
-
- if (spnego_state->needs_mic_sign) {
- nt_status = gensec_sign_packet(spnego_state->sub_sec_security,
- out_mem_ctx,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- spnego_state->mech_types.data,
- spnego_state->mech_types.length,
- &mech_list_mic);
- if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(2,("GENSEC SPNEGO: failed to sign mechListMIC: %s\n",
- nt_errstr(nt_status)));
- spnego_free_data(&spnego);
- return nt_status;
+
+ /*
+ * This is the 'fallback' case, where we don't get
+ * SPNEGO, and have to try all the other options (and
+ * hope they all have a magic string they check)
+ */
+ status = gensec_spnego_server_try_fallback(gensec_security,
+ spnego_state,
+ state,
+ state->full_in);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
}
- spnego_state->needs_mic_sign = false;
- }
- if (spnego_state->needs_mic_check) {
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ /*
+ * We'll continue with SPNEGO_FALLBACK below...
+ */
+ break;
}
+ state->spnego_in = &state->_spnego_in;
- client_response:
- spnego_free_data(&spnego);
-
- if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
- && !NT_STATUS_IS_OK(nt_status)) {
- DEBUG(1, ("SPNEGO(%s) login failed: %s\n",
- spnego_state->sub_sec_security->ops->name,
- nt_errstr(nt_status)));
- return nt_status;
+ /* OK, so it's real SPNEGO, check the packet's the one we expect */
+ if (state->spnego_in->type != spnego_state->expected_packet) {
+ DEBUG(1, ("Invalid SPNEGO request: %d, expected %d\n",
+ state->spnego_in->type,
+ spnego_state->expected_packet));
+ dump_data(1, state->full_in.data,
+ state->full_in.length);
+ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
}
- if (unwrapped_out.length || mech_list_mic.length) {
- /* compose reply */
- spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
- spnego_out.negTokenTarg.negResult = SPNEGO_NONE_RESULT;
- spnego_out.negTokenTarg.supportedMech = NULL;
- spnego_out.negTokenTarg.responseToken = unwrapped_out;
- spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
-
- if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
- DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
+ break;
- spnego_state->num_targs++;
- spnego_state->state_position = SPNEGO_CLIENT_TARG;
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
- } else {
+ default:
+ smb_panic(__location__);
+ return NULL;
+ }
- /* all done - server has accepted, and we agree */
- *out = null_data_blob;
+ gensec_spnego_update_pre(req);
+ if (!tevent_req_is_in_progress(req)) {
+ return tevent_req_post(req, ev);
+ }
- if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
- /* unless of course it did not accept */
- DEBUG(1,("gensec_update ok but not accepted\n"));
- nt_status = NT_STATUS_INVALID_PARAMETER;
- }
+ if (state->sub.needed) {
+ struct tevent_req *subreq = NULL;
- spnego_state->state_position = SPNEGO_DONE;
+ /*
+ * We may need one more roundtrip...
+ */
+ subreq = gensec_update_send(state, state->ev,
+ spnego_state->sub_sec_security,
+ state->sub.in);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
}
-
- return nt_status;
+ tevent_req_set_callback(subreq,
+ gensec_spnego_update_done,
+ req);
+ state->sub.needed = false;
+ return req;
}
- case SPNEGO_DONE:
- /* We should not be called after we are 'done' */
- return NT_STATUS_INVALID_PARAMETER;
+
+ gensec_spnego_update_post(req);
+ if (!tevent_req_is_in_progress(req)) {
+ return tevent_req_post(req, ev);
}
- return NT_STATUS_INVALID_PARAMETER;
+
+ return req;
}
static NTSTATUS gensec_spnego_update_in(struct gensec_security *gensec_security,
- const DATA_BLOB in, DATA_BLOB *full_in)
+ const DATA_BLOB in, TALLOC_CTX *mem_ctx,
+ DATA_BLOB *full_in)
{
struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
size_t expected;
*full_in = data_blob_null;
+ switch (spnego_state->state_position) {
+ case SPNEGO_FALLBACK:
+ *full_in = in;
+ spnego_state->in_needed = 0;
+ return NT_STATUS_OK;
+
+ case SPNEGO_CLIENT_START:
+ case SPNEGO_CLIENT_TARG:
+ case SPNEGO_SERVER_START:
+ case SPNEGO_SERVER_TARG:
+ break;
+
+ case SPNEGO_DONE:
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
if (spnego_state->in_needed == 0) {
size_t size = 0;
int ret;
* more than expected.
*/
*full_in = in;
+ spnego_state->in_needed = 0;
return NT_STATUS_OK;
}
}
*full_in = spnego_state->in_frag;
+ talloc_steal(mem_ctx, full_in->data);
+ spnego_state->in_frag = data_blob_null;
+ spnego_state->in_needed = 0;
return NT_STATUS_OK;
}
+static void gensec_spnego_update_pre(struct tevent_req *req)
+{
+ struct gensec_spnego_update_state *state =
+ tevent_req_data(req,
+ struct gensec_spnego_update_state);
+ struct gensec_security *gensec_security = state->gensec;
+ struct spnego_state *spnego_state = state->spnego;
+ struct tevent_context *ev = state->ev;
+ NTSTATUS status;
+
+ state->sub.needed = false;
+ state->sub.in = data_blob_null;
+ state->sub.status = NT_STATUS_INTERNAL_ERROR;
+ state->sub.out = data_blob_null;
+
+ if (spnego_state->state_position == SPNEGO_FALLBACK) {
+ state->sub.in = state->full_in;
+ state->full_in = data_blob_null;
+ state->sub.needed = true;
+ return;
+ }
+
+ switch (spnego_state->state_position) {
+ case SPNEGO_CLIENT_START:
+ if (state->spnego_in == NULL) {
+ /* client to produce negTokenInit */
+ status = gensec_spnego_create_negTokenInit(gensec_security,
+ spnego_state, state, ev,
+ &spnego_state->out_frag);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+ break;
+ }
+
+ status = gensec_spnego_client_negTokenInit(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &spnego_state->out_frag);
+ break;
+
+ case SPNEGO_CLIENT_TARG:
+ status = gensec_spnego_client_negTokenTarg(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &spnego_state->out_frag);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+ break;
+
+ case SPNEGO_SERVER_START:
+ if (state->spnego_in == NULL) {
+ /* server to produce negTokenInit */
+ status = gensec_spnego_create_negTokenInit(gensec_security,
+ spnego_state, state, ev,
+ &spnego_state->out_frag);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+ break;
+ }
+
+ status = gensec_spnego_server_negTokenInit(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &spnego_state->out_frag);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+ break;
+
+ case SPNEGO_SERVER_TARG:
+ status = gensec_spnego_server_negTokenTarg(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &spnego_state->out_frag);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+ break;
+
+ default:
+ smb_panic(__location__);
+ return;
+ }
+
+ spnego_state->out_status = status;
+}
+
+static void gensec_spnego_update_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req =
+ tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct gensec_spnego_update_state *state =
+ tevent_req_data(req,
+ struct gensec_spnego_update_state);
+ struct spnego_state *spnego_state = state->spnego;
+
+ state->sub.status = gensec_update_recv(subreq, state, &state->sub.out);
+ TALLOC_FREE(subreq);
+ if (NT_STATUS_IS_OK(state->sub.status)) {
+ spnego_state->sub_sec_ready = true;
+ }
+
+ gensec_spnego_update_post(req);
+}
+
+static void gensec_spnego_update_post(struct tevent_req *req)
+{
+ struct gensec_spnego_update_state *state =
+ tevent_req_data(req,
+ struct gensec_spnego_update_state);
+ struct spnego_state *spnego_state = state->spnego;
+ NTSTATUS status;
+
+ state->sub.in = data_blob_null;
+ state->sub.needed = false;
+
+ if (spnego_state->state_position == SPNEGO_FALLBACK) {
+ status = state->sub.status;
+ spnego_state->out_frag = state->sub.out;
+ talloc_steal(spnego_state, spnego_state->out_frag.data);
+ state->sub.out = data_blob_null;
+ goto respond;
+ }
+
+ /*
+ * For now just handle the sync processing done
+ * in gensec_spnego_update_pre()
+ */
+ status = spnego_state->out_status;
+
+ if (NT_STATUS_IS_OK(status)) {
+ bool reset_full = true;
+
+ reset_full = !spnego_state->done_mic_check;
+
+ status = gensec_may_reset_crypto(spnego_state->sub_sec_security,
+ reset_full);
+ if (tevent_req_nterror(req, status)) {
+ return;
+ }
+ }
+
+respond:
+ spnego_state->out_status = status;
+
+ status = gensec_spnego_update_out(state->gensec,
+ state, &state->out);
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return;
+ }
+
+ state->status = status;
+ tevent_req_done(req);
+ return;
+}
+
static NTSTATUS gensec_spnego_update_out(struct gensec_security *gensec_security,
TALLOC_CTX *out_mem_ctx,
DATA_BLOB *_out)
*_out = data_blob_null;
- if (spnego_state->out_frag.length == 0) {
- return spnego_state->out_status;
- }
-
- /*
- * There is still more data to be delivered
- * to the remote peer.
- */
-
if (spnego_state->out_frag.length <= spnego_state->out_max_length) {
/*
* Fast path, we can deliver everything
*/
*_out = spnego_state->out_frag;
- talloc_steal(out_mem_ctx, _out->data);
- spnego_state->out_frag = data_blob_null;
- return spnego_state->out_status;
+ if (spnego_state->out_frag.length > 0) {
+ talloc_steal(out_mem_ctx, _out->data);
+ spnego_state->out_frag = data_blob_null;
+ }
+
+ if (!NT_STATUS_IS_OK(spnego_state->out_status)) {
+ return spnego_state->out_status;
+ }
+
+ /*
+ * We're completely done, further updates are not allowed.
+ */
+ spnego_state->state_position = SPNEGO_DONE;
+ return gensec_child_ready(gensec_security,
+ spnego_state->sub_sec_security);
}
out = spnego_state->out_frag;
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
-static NTSTATUS gensec_spnego_update_wrapper(struct gensec_security *gensec_security,
- TALLOC_CTX *out_mem_ctx,
- struct tevent_context *ev,
- const DATA_BLOB in, DATA_BLOB *out)
+static NTSTATUS gensec_spnego_update_recv(struct tevent_req *req,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
- DATA_BLOB full_in = data_blob_null;
+ struct gensec_spnego_update_state *state =
+ tevent_req_data(req,
+ struct gensec_spnego_update_state);
NTSTATUS status;
*out = data_blob_null;
- if (spnego_state->out_frag.length > 0) {
- if (in.length > 0) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- return gensec_spnego_update_out(gensec_security,
- out_mem_ctx,
- out);
- }
-
- status = gensec_spnego_update_in(gensec_security,
- in, &full_in);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- status = gensec_spnego_update(gensec_security,
- spnego_state, ev,
- full_in,
- &spnego_state->out_frag);
- data_blob_free(&spnego_state->in_frag);
- spnego_state->in_needed = 0;
- if (NT_STATUS_IS_OK(status)) {
- bool reset_full = true;
-
- gensec_security->child_security = spnego_state->sub_sec_security;
-
- reset_full = !spnego_state->done_mic_check;
-
- status = gensec_may_reset_crypto(spnego_state->sub_sec_security,
- reset_full);
- }
- if (!NT_STATUS_IS_OK(status) &&
- !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
return status;
}
- spnego_state->out_status = status;
-
- return gensec_spnego_update_out(gensec_security,
- out_mem_ctx,
- out);
-}
-
-static void gensec_spnego_want_feature(struct gensec_security *gensec_security,
- uint32_t feature)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (!spnego_state || !spnego_state->sub_sec_security) {
- gensec_security->want_features |= feature;
- return;
- }
-
- gensec_want_feature(spnego_state->sub_sec_security,
- feature);
-}
-
-static bool gensec_spnego_have_feature(struct gensec_security *gensec_security,
- uint32_t feature)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
- if (!spnego_state->sub_sec_security) {
- return false;
- }
-
- return gensec_have_feature(spnego_state->sub_sec_security,
- feature);
-}
-
-static NTTIME gensec_spnego_expire_time(struct gensec_security *gensec_security)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-
- if (!spnego_state->sub_sec_security) {
- return GENSEC_EXPIRE_TIME_INFINITY;
- }
-
- return gensec_expire_time(spnego_state->sub_sec_security);
+ *out = state->out;
+ talloc_steal(out_mem_ctx, state->out.data);
+ status = state->status;
+ tevent_req_received(req);
+ return status;
}
static const char *gensec_spnego_oids[] = {
.oid = gensec_spnego_oids,
.client_start = gensec_spnego_client_start,
.server_start = gensec_spnego_server_start,
- .update = gensec_spnego_update_wrapper,
- .seal_packet = gensec_spnego_seal_packet,
- .sign_packet = gensec_spnego_sign_packet,
- .sig_size = gensec_spnego_sig_size,
- .max_wrapped_size = gensec_spnego_max_wrapped_size,
- .max_input_size = gensec_spnego_max_input_size,
- .check_packet = gensec_spnego_check_packet,
- .unseal_packet = gensec_spnego_unseal_packet,
- .wrap = gensec_spnego_wrap,
- .unwrap = gensec_spnego_unwrap,
- .session_key = gensec_spnego_session_key,
- .session_info = gensec_spnego_session_info,
- .want_feature = gensec_spnego_want_feature,
- .have_feature = gensec_spnego_have_feature,
- .expire_time = gensec_spnego_expire_time,
+ .update_send = gensec_spnego_update_send,
+ .update_recv = gensec_spnego_update_recv,
+ .seal_packet = gensec_child_seal_packet,
+ .sign_packet = gensec_child_sign_packet,
+ .sig_size = gensec_child_sig_size,
+ .max_wrapped_size = gensec_child_max_wrapped_size,
+ .max_input_size = gensec_child_max_input_size,
+ .check_packet = gensec_child_check_packet,
+ .unseal_packet = gensec_child_unseal_packet,
+ .wrap = gensec_child_wrap,
+ .unwrap = gensec_child_unwrap,
+ .session_key = gensec_child_session_key,
+ .session_info = gensec_child_session_info,
+ .want_feature = gensec_child_want_feature,
+ .have_feature = gensec_child_have_feature,
+ .expire_time = gensec_child_expire_time,
+ .final_auth_type = gensec_child_final_auth_type,
.enabled = true,
.priority = GENSEC_SPNEGO
};
-_PUBLIC_ NTSTATUS gensec_spnego_init(void)
+_PUBLIC_ NTSTATUS gensec_spnego_init(TALLOC_CTX *ctx)
{
NTSTATUS ret;
- ret = gensec_register(&gensec_spnego_security_ops);
+ ret = gensec_register(ctx, &gensec_spnego_security_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register '%s' gensec backend!\n",
gensec_spnego_security_ops.name));
git.samba.org / samba.git / blobdiff