return NT_STATUS_INVALID_PARAMETER;
}
-/*
- Parse the netTokenInit, either from the client, to the server, or
- from the server to the client.
-*/
-
-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,
- struct spnego_data *spnego_in,
- DATA_BLOB *unwrapped_out)
-{
- int i;
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- const char * const *mechType = NULL;
- DATA_BLOB unwrapped_in = data_blob_null;
- bool ok;
- const struct gensec_security_ops_wrapper *all_sec = NULL;
-
- if (spnego_in->type != SPNEGO_NEG_TOKEN_INIT) {
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- mechType = spnego_in->negTokenInit.mechTypes;
- unwrapped_in = spnego_in->negTokenInit.mechToken;
-
- all_sec = gensec_security_by_oid_list(gensec_security,
- out_mem_ctx,
- mechType,
- GENSEC_OID_SPNEGO);
-
- ok = spnego_write_mech_types(spnego_state,
- mechType,
- &spnego_state->mech_types);
- if (!ok) {
- DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
- return NT_STATUS_NO_MEMORY;
- }
-
- 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)) {
- /*
- * Pretend we never started it
- */
- gensec_spnego_update_sub_abort(spnego_state);
- 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->downgraded = true;
- 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_IS_OK(nt_status)) {
- spnego_state->sub_sec_ready = true;
- }
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER) ||
- NT_STATUS_EQUAL(nt_status, NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
-
- DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed to parse contents: %s\n",
- spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
-
- /*
- * Pretend we never started it
- */
- gensec_spnego_update_sub_abort(spnego_state);
- break;
- }
-
- spnego_state->neg_oid = all_sec[i].oid;
- break;
- }
- if (spnego_state->sub_sec_security) {
- break;
- }
- }
-
- 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;
- }
- }
-
- /* 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 */
- unwrapped_in = data_blob_null;
-
- 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)) {
- /*
- * Pretend we never started it.
- */
- gensec_spnego_update_sub_abort(spnego_state);
- continue;
- }
-
- spnego_state->neg_oid = all_sec[i].oid;
-
- /* only get the helping start blob for the first OID */
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx,
- ev,
- unwrapped_in,
- unwrapped_out);
- if (NT_STATUS_IS_OK(nt_status)) {
- spnego_state->sub_sec_ready = true;
- }
-
- /* 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)) {
- const char *next = NULL;
- const char *principal = NULL;
- int dbg_level = DBGLVL_WARNING;
-
- if (all_sec[i+1].op != NULL) {
- next = all_sec[i+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;
- }
-
- DEBUG(dbg_level, ("SPNEGO(%s) creating NEG_TOKEN_INIT for %s failed (next[%s]): %s\n",
- spnego_state->sub_sec_security->ops->name,
- principal,
- next, nt_errstr(nt_status)));
-
- /*
- * Pretend we never started it.
- */
- gensec_spnego_update_sub_abort(spnego_state);
- continue;
- }
- }
-
- break;
- }
- }
-
- 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 */
-
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
- *unwrapped_out = data_blob_null;
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
- }
-
- if (GENSEC_UPDATE_IS_NTERROR(nt_status)) {
- DEBUG(1, ("SPNEGO(%s) NEG_TOKEN_INIT failed: %s\n",
- spnego_state->sub_sec_security->ops->name, nt_errstr(nt_status)));
-
- /* We started the mech correctly, and the
- * input from the other side was valid.
- * Return the error (say bad password, invalid
- * ticket) */
- gensec_spnego_update_sub_abort(spnego_state);
- return nt_status;
- }
-
- return nt_status; /* OK or MORE PROCESSING */
- }
-
- 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 */
-
- return nt_status;
-}
-
/** 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
struct tevent_context *ev,
DATA_BLOB *out)
{
- int i;
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
+ 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;
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,
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;
+ if (all_sec == NULL) {
+ DBG_WARNING("gensec_security_by_oid_list() failed\n");
+ return NT_STATUS_NO_MEMORY;
+ }
- nt_status = gensec_subcontext_start(spnego_state,
- gensec_security,
- &spnego_state->sub_sec_security);
- if (!NT_STATUS_IS_OK(nt_status)) {
- return nt_status;
+ 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 */
- nt_status = gensec_start_mech_by_ops(spnego_state->sub_sec_security,
- all_sec[i].op);
- if (!NT_STATUS_IS_OK(nt_status)) {
+ 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 */
- if (spnego_state->state_position == SPNEGO_CLIENT_START) {
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx,
- ev,
- data_blob_null,
- &unwrapped_out);
- if (NT_STATUS_IS_OK(nt_status)) {
- spnego_state->sub_sec_ready = true;
- }
+ 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(nt_status)) {
- const char *next = NULL;
- const char *principal = NULL;
- int dbg_level = DBGLVL_WARNING;
-
- if (all_sec[i+1].op != NULL) {
- next = all_sec[i+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;
- }
-
- DEBUG(dbg_level, ("SPNEGO(%s) creating NEG_TOKEN_INIT for %s failed (next[%s]): %s\n",
- spnego_state->sub_sec_security->ops->name,
- principal,
- next, nt_errstr(nt_status)));
+ if (!GENSEC_UPDATE_IS_NTERROR(status)) {
+ goto reply;
+ }
- /*
- * Pretend we never started it
- */
- gensec_spnego_update_sub_abort(spnego_state);
- continue;
- }
+ if (cur_sec[1].op != NULL) {
+ next = cur_sec[1].op->name;
+ dbg_level = DBGLVL_NOTICE;
}
- spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
+ 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;
+ }
- send_mech_types = gensec_security_oids_from_ops_wrapped(out_mem_ctx,
- &all_sec[i]);
+ 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)));
- 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 (next == NULL) {
+ /*
+ * A hard error without a possible fallback.
+ */
+ return status;
}
- /* 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;
+ /*
+ * Pretend we never started it
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ }
- if (spnego_state->state_position == SPNEGO_SERVER_START) {
- spnego_out.negTokenInit.mechListMIC
- = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
- } else {
- spnego_out.negTokenInit.mechListMIC = data_blob_null;
- }
+ DBG_WARNING("Failed to setup SPNEGO negTokenInit request\n");
+ return NT_STATUS_INVALID_PARAMETER;
- spnego_out.negTokenInit.mechToken = unwrapped_out;
+reply:
+ spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
- 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;
- }
+ 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;
+ }
- /* set next state */
- spnego_state->neg_oid = all_sec[i].oid;
+ ok = spnego_write_mech_types(spnego_state,
+ send_mech_types,
+ &spnego_state->mech_types);
+ if (!ok) {
+ DBG_ERR("Failed to write mechTypes\n");
+ return NT_STATUS_NO_MEMORY;
+ }
- 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;
- }
+ /* 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;
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ if (spnego_state->state_position == SPNEGO_SERVER_START) {
+ spnego_out.negTokenInit.mechListMIC
+ = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
+ } else {
+ spnego_out.negTokenInit.mechListMIC = data_blob_null;
}
- gensec_spnego_update_sub_abort(spnego_state);
- DEBUG(10, ("Failed to setup SPNEGO negTokenInit request: %s\n", nt_errstr(nt_status)));
- return nt_status;
+ 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;
+ }
+
+ /*
+ * 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;
+
+ /* 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;
}
static NTSTATUS gensec_spnego_client_negTokenInit(struct gensec_security *gensec_security,
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;
}
}
- status = gensec_spnego_parse_negTokenInit(gensec_security,
- spnego_state,
- out_mem_ctx,
- ev,
- spnego_in,
- &sub_out);
- if (GENSEC_UPDATE_IS_NTERROR(status)) {
- return status;
+ 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;
+ }
+
+ 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;
+ }
+
+ /* 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;
+ }
+
+ 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;
+ }
+
+ /*
+ * Pretend we never started it.
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
}
+ DBG_WARNING("Could not find a suitable mechtype in NEG_TOKEN_INIT\n");
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+
+ reply:
my_mechs[0] = spnego_state->neg_oid;
/* compose reply */
spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
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;
}
&spnego_state->mech_types);
if (!ok) {
DBG_ERR("failed to write mechTypes\n");
+ TALLOC_FREE(frame);
return NT_STATUS_NO_MEMORY;
}
spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
spnego_state->state_position = SPNEGO_CLIENT_TARG;
+ TALLOC_FREE(frame);
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
TALLOC_CTX *out_mem_ctx,
DATA_BLOB *out)
{
+ 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;
- status = gensec_spnego_parse_negTokenInit(gensec_security,
- spnego_state,
- out_mem_ctx,
- ev,
- spnego_in,
- &sub_out);
+ mech_types = spnego_in->negTokenInit.mechTypes;
+ if (mech_types == NULL) {
+ TALLOC_FREE(frame);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- 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;
+ 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;
}
- return gensec_spnego_server_response(spnego_state,
- out_mem_ctx,
- status,
- sub_out,
- mech_list_mic,
- out);
-}
+ 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;
+ }
-static NTSTATUS gensec_spnego_update_client(struct gensec_security *gensec_security,
- TALLOC_CTX *out_mem_ctx,
- struct tevent_context *ev,
- struct spnego_data *spnego_in,
- DATA_BLOB *out)
-{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
+ /*
+ * 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;
+ }
+ }
- *out = data_blob_null;
+ if (cur_sec == NULL) {
+ continue;
+ }
- /* and switch into the state machine */
+ status = gensec_subcontext_start(spnego_state,
+ gensec_security,
+ &spnego_state->sub_sec_security);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(frame);
+ return status;
+ }
- switch (spnego_state->state_position) {
- case SPNEGO_CLIENT_START:
- return gensec_spnego_client_negTokenInit(gensec_security,
- spnego_state,
- ev, spnego_in,
- out_mem_ctx, out);
+ /* 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;
+ }
- case SPNEGO_CLIENT_TARG:
- return gensec_spnego_client_negTokenTarg(gensec_security,
- spnego_state,
- ev, spnego_in,
- out_mem_ctx, out);
+ 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;
+ }
- default:
- break;
+ /*
+ * 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)) {
+
+ DBG_WARNING("%s: NEG_TOKEN_INIT failed to parse contents: %s\n",
+ cur_sec->op->name, nt_errstr(status));
+
+ /*
+ * Pretend we never started it
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ continue;
+ }
+
+ 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_state->neg_oid = cur_sec->oid;
+ goto reply; /* OK or MORE PROCESSING */
}
- smb_panic(__location__);
- return NT_STATUS_INTERNAL_ERROR;
+ DBG_WARNING("Could not find a suitable mechtype in NEG_TOKEN_INIT\n");
+ status = 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;
+ }
+
+ status = gensec_spnego_server_response(spnego_state,
+ out_mem_ctx,
+ status,
+ sub_out,
+ mech_list_mic,
+ out);
+ TALLOC_FREE(frame);
+ return status;
}
-static NTSTATUS gensec_spnego_update_server(struct gensec_security *gensec_security,
- TALLOC_CTX *out_mem_ctx,
- struct tevent_context *ev,
- struct spnego_data *spnego_in,
- DATA_BLOB *out)
+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)
{
- struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
+ const struct spnego_negTokenTarg *ta = &spnego_in->negTokenTarg;
+ DATA_BLOB sub_in = ta->responseToken;
DATA_BLOB mech_list_mic = data_blob_null;
- DATA_BLOB unwrapped_out = data_blob_null;
-
- /* and switch into the state machine */
-
- switch (spnego_state->state_position) {
- case SPNEGO_SERVER_START:
- return gensec_spnego_server_negTokenInit(gensec_security,
- spnego_state,
- ev, spnego_in,
- out_mem_ctx, out);
+ DATA_BLOB sub_out = data_blob_null;
+ NTSTATUS status;
+ bool have_sign = true;
+ bool new_spnego = false;
- case SPNEGO_SERVER_TARG:
- {
- NTSTATUS nt_status;
- bool have_sign = true;
- bool new_spnego = false;
+ spnego_state->num_targs++;
- spnego_state->num_targs++;
+ 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->sub_sec_security) {
- DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
+ 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 (spnego_state->needs_mic_check) {
- if (spnego_in->negTokenTarg.responseToken.length != 0) {
- DEBUG(1, ("SPNEGO: Did not setup a mech in NEG_TOKEN_INIT\n"));
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- 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_in->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)));
- }
+ 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_state->sub_sec_ready) {
- nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx, ev,
- spnego_in->negTokenTarg.responseToken,
- &unwrapped_out);
- if (NT_STATUS_IS_OK(nt_status)) {
- spnego_state->sub_sec_ready = true;
- }
- if (!NT_STATUS_IS_OK(nt_status)) {
- goto server_response;
- }
- } else {
- nt_status = NT_STATUS_OK;
- }
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ goto server_response;
+ }
- 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 (spnego_in->negTokenTarg.mechListMIC.length > 0) {
- new_spnego = true;
+ 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 (have_sign && new_spnego) {
- spnego_state->needs_mic_check = true;
- spnego_state->needs_mic_sign = true;
+ if (!NT_STATUS_IS_OK(status)) {
+ goto server_response;
}
+ } else {
+ status = NT_STATUS_OK;
+ }
- if (have_sign && spnego_in->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_in->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;
- }
+ 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;
+ }
- 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 (have_sign && new_spnego) {
+ spnego_state->needs_mic_check = true;
+ spnego_state->needs_mic_sign = true;
+ }
- if (spnego_state->needs_mic_check) {
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ 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;
}
- server_response:
- nt_status = gensec_spnego_server_response(spnego_state,
- out_mem_ctx,
- nt_status,
- unwrapped_out,
- mech_list_mic,
- out);
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ }
- return nt_status;
+ 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;
}
- default:
- break;
+ if (spnego_state->needs_mic_check) {
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
}
- smb_panic(__location__);
- return NT_STATUS_INTERNAL_ERROR;
+ server_response:
+ return gensec_spnego_server_response(spnego_state,
+ out_mem_ctx,
+ status,
+ sub_out,
+ mech_list_mic,
+ out);
}
struct gensec_spnego_update_state {
+ struct tevent_context *ev;
struct gensec_security *gensec;
struct spnego_state *spnego;
+
DATA_BLOB full_in;
struct spnego_data _spnego_in;
struct spnego_data *spnego_in;
+
+ struct {
+ bool needed;
+ DATA_BLOB in;
+ NTSTATUS status;
+ DATA_BLOB out;
+ } sub;
+
NTSTATUS status;
DATA_BLOB out;
};
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);
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);
return NULL;
}
- /* and switch into the state machine */
-
- switch (spnego_state->state_position) {
- case SPNEGO_FALLBACK:
- status = gensec_update_ev(spnego_state->sub_sec_security,
- state, ev,
- state->full_in,
- &spnego_state->out_frag);
- break;
-
- 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);
- break;
- }
-
- /* fall through */
- case SPNEGO_CLIENT_TARG:
- status = gensec_spnego_update_client(gensec_security,
- state, ev,
- state->spnego_in,
- &spnego_state->out_frag);
- 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);
- break;
- }
-
- /* fall through */
- case SPNEGO_SERVER_TARG:
- status = gensec_spnego_update_server(gensec_security,
- state, ev,
- state->spnego_in,
- &spnego_state->out_frag);
- break;
-
- default:
- smb_panic(__location__);
- return NULL;
- }
-
- if (GENSEC_UPDATE_IS_NTERROR(status)) {
- tevent_req_nterror(req, status);
+ gensec_spnego_update_pre(req);
+ if (!tevent_req_is_in_progress(req)) {
return tevent_req_post(req, ev);
}
- if (NT_STATUS_IS_OK(status)) {
- bool reset_full = true;
-
- reset_full = !spnego_state->done_mic_check;
+ if (state->sub.needed) {
+ struct tevent_req *subreq = NULL;
- status = gensec_may_reset_crypto(spnego_state->sub_sec_security,
- reset_full);
- if (tevent_req_nterror(req, status)) {
+ /*
+ * 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);
}
+ tevent_req_set_callback(subreq,
+ gensec_spnego_update_done,
+ req);
+ state->sub.needed = false;
+ return req;
}
- spnego_state->out_status = status;
-
- status = gensec_spnego_update_out(gensec_security,
- state, &state->out);
- if (GENSEC_UPDATE_IS_NTERROR(status)) {
- tevent_req_nterror(req, status);
+ gensec_spnego_update_post(req);
+ if (!tevent_req_is_in_progress(req)) {
return tevent_req_post(req, ev);
}
- state->status = status;
- tevent_req_done(req);
- return tevent_req_post(req, ev);
+ return req;
}
static NTSTATUS gensec_spnego_update_in(struct gensec_security *gensec_security,
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)
git.samba.org / vlendec / samba-autobuild / .git / blobdiff