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,
- out_mem_ctx, ev, in, out);
- return nt_status;
+
+ return NT_STATUS_OK;
}
DEBUG(1, ("Failed to parse SPNEGO request\n"));
return NT_STATUS_INVALID_PARAMETER;
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)
+ 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;
+ uint32_t j;
+
+ if (spnego_state->state_position != SPNEGO_SERVER_START) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
- const struct gensec_security_ops_wrapper *all_sec
- = gensec_security_by_oid_list(gensec_security,
+ if (spnego_in->type != SPNEGO_NEG_TOKEN_INIT) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ mechType = spnego_in->negTokenInit.mechTypes;
+ if (mechType == NULL) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ unwrapped_in = spnego_in->negTokenInit.mechToken;
+
+ all_sec = gensec_security_by_oid_list(gensec_security,
out_mem_ctx,
mechType,
GENSEC_OID_SPNEGO);
+ if (all_sec == NULL) {
+ DBG_WARNING("gensec_security_by_oid_list() failed\n");
+ return NT_STATUS_INVALID_PARAMETER;
+ }
ok = spnego_write_mech_types(spnego_state,
mechType,
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;
+ 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;
}
- }
-
- 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 */
-
- 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);
all_sec[i].op);
if (!NT_STATUS_IS_OK(nt_status)) {
/*
- * Pretend we never started it.
+ * Pretend we never started it
*/
gensec_spnego_update_sub_abort(spnego_state);
- continue;
+ break;
}
- spnego_state->neg_oid = all_sec[i].oid;
+ 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;
+ }
- /* only get the helping start blob for the first OID */
nt_status = gensec_update_ev(spnego_state->sub_sec_security,
- out_mem_ctx,
+ out_mem_ctx,
ev,
- data_blob_null,
+ 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)) {
- /* 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;
- }
+ 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;
+ }
+
if (spnego_state->sub_sec_security) {
/* it is likely that a NULL input token will
* not be liked by most server mechs, but this
nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
}
- 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)) {
+ 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)));
return nt_status;
}
- return nt_status; /* OK, INVALID_PARAMETER ore MORE PROCESSING */
+ return nt_status; /* OK or MORE PROCESSING */
}
DEBUG(1, ("SPNEGO: Could not find a suitable mechtype in NEG_TOKEN_INIT\n"));
spnego_state->sub_sec_ready = true;
}
- if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
- && !NT_STATUS_IS_OK(nt_status)) {
+ if (GENSEC_UPDATE_IS_NTERROR(nt_status)) {
const char *next = NULL;
const char *principal = NULL;
int dbg_level = DBGLVL_WARNING;
/* set next state */
spnego_state->neg_oid = all_sec[i].oid;
+ 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;
}
gensec_spnego_update_sub_abort(spnego_state);
return nt_status;
}
-
-/** create a server negTokenTarg
- *
- * This is the case, where the client is the first one who sends data
-*/
-
-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)
+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;
- /* compose reply */
- spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
- spnego_out.negTokenTarg.responseToken = unwrapped_out;
- spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
- spnego_out.negTokenTarg.supportedMech = NULL;
+ *out = data_blob_null;
- if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
- if (spnego_state->mic_requested) {
- spnego_out.negTokenTarg.negResult = SPNEGO_REQUEST_MIC;
- spnego_state->mic_requested = false;
+ /* The server offers a list of mechanisms */
+
+ 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);
+ }
+ }
+
+ 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 {
- spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
+ principal = gensec_security->target.hostname;
}
- spnego_state->state_position = SPNEGO_SERVER_TARG;
- } else if (NT_STATUS_IS_OK(nt_status)) {
- if (unwrapped_out.data) {
- spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
+
+ 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 (allow_fallback && next != NULL) {
+ /*
+ * Pretend we never started it.
+ */
+ gensec_spnego_update_sub_abort(spnego_state);
+ continue;
}
- spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
- spnego_state->state_position = SPNEGO_DONE;
- } else {
- spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
- spnego_out.negTokenTarg.mechListMIC = data_blob_null;
- DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
- spnego_state->state_position = SPNEGO_DONE;
+
+ /*
+ * Hard error.
+ */
+ TALLOC_FREE(frame);
+ return status;
}
+ 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;
+ 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) {
- DEBUG(1, ("Failed to write SPNEGO reply to NEG_TOKEN_TARG\n"));
+ 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->num_targs++;
+ spnego_state->state_position = SPNEGO_CLIENT_TARG;
- return nt_status;
+ TALLOC_FREE(frame);
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
-static NTSTATUS gensec_spnego_update_client(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_client_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;
+ 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;
+ DATA_BLOB sub_out = data_blob_null;
struct spnego_data spnego_out;
- struct spnego_data spnego;
- ssize_t len;
+ NTSTATUS status;
*out = data_blob_null;
- /* and switch into the state machine */
+ spnego_state->num_targs++;
- switch (spnego_state->state_position) {
- case SPNEGO_CLIENT_START:
- {
- /* The server offers a list of mechanisms */
+ if (ta->negResult == SPNEGO_REJECT) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
- const char *my_mechs[] = {NULL, NULL};
- NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
- bool ok;
- const char *tp = NULL;
+ if (ta->negResult == SPNEGO_REQUEST_MIC) {
+ spnego_state->mic_requested = true;
+ }
- if (!in.length) {
- /* client to produce negTokenInit */
- nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
- out_mem_ctx, ev, out);
- spnego_state->state_position = SPNEGO_CLIENT_TARG;
- spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
- return nt_status;
- }
+ if (ta->mechListMIC.length > 0) {
+ DATA_BLOB *m = &ta->mechListMIC;
+ const DATA_BLOB *r = &ta->responseToken;
- len = spnego_read_data(gensec_security, in, &spnego);
+ /*
+ * Windows 2000 has a bug, it repeats the
+ * responseToken in the mechListMIC field.
+ */
+ if (m->length == r->length) {
+ int cmp;
- if (len == -1) {
- DEBUG(1, ("Invalid SPNEGO request:\n"));
- dump_data(1, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
+ cmp = memcmp(m->data, r->data, m->length);
+ if (cmp == 0) {
+ data_blob_free(m);
+ }
}
+ }
- /* 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;
- }
+ /* 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;
- tp = spnego.negTokenInit.targetPrincipal;
- if (tp != NULL && strcmp(tp, ADS_IGNORE_PRINCIPAL) != 0) {
- DEBUG(5, ("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);
- }
- }
+ 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;
- nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
- spnego_state,
- out_mem_ctx,
- ev,
- spnego.negTokenInit.mechTypes,
- spnego.negTokenInit.mechToken,
- &unwrapped_out);
+ DBG_NOTICE("client preferred mech (%s[%s]) not accepted, "
+ "server wants: %s[%s]\n",
+ client_mech, client_oid, server_mech, server_oid);
- if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) && !NT_STATUS_IS_OK(nt_status)) {
- spnego_free_data(&spnego);
- return nt_status;
- }
+ spnego_state->downgraded = true;
+ gensec_spnego_update_sub_abort(spnego_state);
- 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 = unwrapped_out;
+ status = gensec_subcontext_start(spnego_state,
+ gensec_security,
+ &spnego_state->sub_sec_security);
+ if (!NT_STATUS_IS_OK(status)) {
+ return 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;
+ /* select the sub context */
+ status = gensec_start_mech_by_oid(spnego_state->sub_sec_security,
+ ta->supportedMech);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
- ok = spnego_write_mech_types(spnego_state,
- my_mechs,
- &spnego_state->mech_types);
- if (!ok) {
- DEBUG(1, ("SPNEGO: Failed to write mechTypes\n"));
+ spnego_state->neg_oid = talloc_strdup(spnego_state,
+ ta->supportedMech);
+ if (spnego_state->neg_oid == NULL) {
return NT_STATUS_NO_MEMORY;
}
-
- /* set next state */
- spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
- spnego_state->state_position = SPNEGO_CLIENT_TARG;
-
- spnego_free_data(&spnego);
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
- case SPNEGO_CLIENT_TARG:
- {
- NTSTATUS nt_status = NT_STATUS_INTERNAL_ERROR;
- const struct spnego_negTokenTarg *ta = NULL;
-
- if (!in.length) {
- return NT_STATUS_INVALID_PARAMETER;
+ if (ta->mechListMIC.length > 0) {
+ if (spnego_state->sub_sec_ready) {
+ spnego_state->needs_mic_check = true;
}
+ }
- len = spnego_read_data(gensec_security, in, &spnego);
-
- if (len == -1) {
- DEBUG(1, ("Invalid SPNEGO request:\n"));
- dump_data(1, in.data, in.length);
+ 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, 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 (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;
}
- ta = &spnego.negTokenTarg;
- spnego_state->num_targs++;
+ 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 (ta->negResult == SPNEGO_REJECT) {
- return NT_STATUS_LOGON_FAILURE;
+ 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;
- if (spnego.negTokenTarg.negResult == SPNEGO_REQUEST_MIC) {
- spnego_state->mic_requested = true;
+ 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);
- /* 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) {
- 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, ta->supportedMech)));
- spnego_state->downgraded = true;
- gensec_spnego_update_sub_abort(spnego_state);
- 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,
- ta->supportedMech);
- if (!NT_STATUS_IS_OK(nt_status)) {
- spnego_free_data(&spnego);
- return nt_status;
- }
-
- spnego_state->neg_oid = talloc_strdup(spnego_state,
- ta->supportedMech);
- if (spnego_state->neg_oid == NULL) {
- spnego_free_data(&spnego);
- return NT_STATUS_NO_MEMORY;
- };
- }
-
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- DATA_BLOB *m = &spnego.negTokenTarg.mechListMIC;
- const DATA_BLOB *r = &spnego.negTokenTarg.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);
- }
- }
- }
-
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- if (spnego_state->sub_sec_ready) {
- spnego_state->needs_mic_check = true;
- }
- }
-
- 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.negTokenTarg.mechListMIC.length == 0
- && spnego_state->may_skip_mic_check) {
+ switch (ta->negResult) {
+ case SPNEGO_ACCEPT_COMPLETED:
+ case SPNEGO_NONE_RESULT:
+ if (spnego_state->num_targs == 1) {
/*
- * 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
+ * the first exchange doesn't require
+ * verification
*/
- spnego_state->needs_mic_check = false;
- nt_status = NT_STATUS_OK;
- goto client_response;
+ new_spnego = false;
}
- 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;
- }
-
- if (!spnego_state->sub_sec_ready) {
- 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)) {
- spnego_state->sub_sec_ready = true;
- }
- if (!NT_STATUS_IS_OK(nt_status)) {
- goto client_response;
- }
- } else {
- nt_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 (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;
+ case SPNEGO_ACCEPT_INCOMPLETE:
+ if (ta->mechListMIC.length > 0) {
+ new_spnego = true;
break;
+ }
- case SPNEGO_ACCEPT_INCOMPLETE:
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- new_spnego = true;
- break;
- }
-
- if (spnego_state->downgraded) {
- /*
- * A downgrade should be protected if
- * supported
- */
- break;
- }
-
+ if (spnego_state->downgraded) {
/*
- * 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.
+ * A downgrade should be protected if
+ * supported
*/
- 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;
+ }
- case SPNEGO_REQUEST_MIC:
- if (spnego.negTokenTarg.mechListMIC.length > 0) {
- new_spnego = true;
- }
- break;
- default:
+ /*
+ * 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 (spnego_state->mic_requested) {
- if (have_sign) {
- new_spnego = true;
- }
+ 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;
- if (have_sign && new_spnego) {
- spnego_state->needs_mic_check = true;
- spnego_state->needs_mic_sign = true;
+ case SPNEGO_REQUEST_MIC:
+ if (ta->mechListMIC.length > 0) {
+ new_spnego = true;
}
+ break;
+ default:
+ 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;
+ if (spnego_state->mic_requested) {
+ if (have_sign) {
+ 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)));
- spnego_free_data(&spnego);
- return nt_status;
- }
- 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 (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;
+ }
- client_response:
- spnego_free_data(&spnego);
+ 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 (!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;
- }
+ if (spnego_state->needs_mic_check) {
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
- 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;
+ 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 (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;
- }
+ 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;
- spnego_state->num_targs++;
- spnego_state->state_position = SPNEGO_CLIENT_TARG;
- nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
- } else {
+ if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
+ DBG_WARNING("Failed to write NEG_TOKEN_TARG\n");
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- /* all done - server has accepted, and we agree */
- *out = data_blob_null;
+ spnego_state->num_targs++;
+ spnego_state->state_position = SPNEGO_CLIENT_TARG;
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else {
- if (ta->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;
- }
+ /* all done - server has accepted, and we agree */
+ *out = data_blob_null;
- spnego_state->state_position = SPNEGO_DONE;
+ 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;
- }
-
- default:
- break;
+ spnego_state->state_position = SPNEGO_DONE;
}
- smb_panic(__location__);
- return NT_STATUS_INTERNAL_ERROR;
+ return status;
}
-static NTSTATUS gensec_spnego_update_server(struct gensec_security *gensec_security,
- TALLOC_CTX *out_mem_ctx,
- struct tevent_context *ev,
- const DATA_BLOB in, DATA_BLOB *out)
+/** create a server negTokenTarg
+ *
+ * This is the case, where the client is the first one who sends data
+*/
+
+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_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
- DATA_BLOB mech_list_mic = data_blob_null;
- DATA_BLOB unwrapped_out = data_blob_null;
- struct spnego_data spnego;
- ssize_t len;
+ struct spnego_data spnego_out;
- /* and switch into the state machine */
+ /* compose reply */
+ spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
+ spnego_out.negTokenTarg.responseToken = unwrapped_out;
+ spnego_out.negTokenTarg.mechListMIC = mech_list_mic;
+ spnego_out.negTokenTarg.supportedMech = NULL;
- switch (spnego_state->state_position) {
- case SPNEGO_SERVER_START:
- {
- NTSTATUS nt_status;
- if (in.length) {
+ if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
+ if (spnego_state->mic_requested) {
+ spnego_out.negTokenTarg.negResult = SPNEGO_REQUEST_MIC;
+ spnego_state->mic_requested = false;
+ } else {
+ spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_INCOMPLETE;
+ }
+ spnego_state->state_position = SPNEGO_SERVER_TARG;
+ } else if (NT_STATUS_IS_OK(nt_status)) {
+ if (unwrapped_out.data) {
+ spnego_out.negTokenTarg.supportedMech = spnego_state->neg_oid;
+ }
+ spnego_out.negTokenTarg.negResult = SPNEGO_ACCEPT_COMPLETED;
+ spnego_state->state_position = SPNEGO_DONE;
+ } else {
+ spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
+ spnego_out.negTokenTarg.mechListMIC = data_blob_null;
+ DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
+ spnego_state->state_position = SPNEGO_DONE;
+ }
- 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;
- }
+ 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;
+ }
- nt_status = gensec_spnego_parse_negTokenInit(gensec_security,
- spnego_state,
- out_mem_ctx,
- ev,
- spnego.negTokenInit.mechTypes,
- spnego.negTokenInit.mechToken,
- &unwrapped_out);
+ spnego_state->expected_packet = SPNEGO_NEG_TOKEN_TARG;
+ spnego_state->num_targs++;
- 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 = unwrapped_out;
- }
+ return nt_status;
+}
- nt_status = gensec_spnego_server_response(spnego_state,
- out_mem_ctx,
- nt_status,
- unwrapped_out,
- mech_list_mic,
- 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)
+{
+ DATA_BLOB sub_out = data_blob_null;
+ DATA_BLOB mech_list_mic = data_blob_null;
+ NTSTATUS status;
- spnego_free_data(&spnego);
+ status = gensec_spnego_parse_negTokenInit(gensec_security,
+ spnego_state,
+ out_mem_ctx,
+ ev,
+ spnego_in,
+ &sub_out);
- return nt_status;
- } else {
- nt_status = gensec_spnego_create_negTokenInit(gensec_security, spnego_state,
- out_mem_ctx, ev, out);
- spnego_state->state_position = SPNEGO_SERVER_START;
- spnego_state->expected_packet = SPNEGO_NEG_TOKEN_INIT;
- return nt_status;
- }
+ 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;
}
- case SPNEGO_SERVER_TARG:
- {
- NTSTATUS nt_status;
- bool have_sign = true;
- bool new_spnego = false;
-
- if (!in.length) {
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- len = spnego_read_data(gensec_security, in, &spnego);
+ return gensec_spnego_server_response(spnego_state,
+ out_mem_ctx,
+ status,
+ sub_out,
+ mech_list_mic,
+ out);
+}
- if (len == -1) {
- DEBUG(1, ("Invalid SPNEGO request:\n"));
- dump_data(1, in.data, in.length);
- return NT_STATUS_INVALID_PARAMETER;
- }
+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;
- /* 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;
- }
+ 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"));
- spnego_free_data(&spnego);
+ 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.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;
- }
-
- 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)));
- }
+ 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;
}
- 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)) {
+ spnego_state->needs_mic_check = false;
+ spnego_state->done_mic_check = true;
+ goto server_response;
+ }
+
+ 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(nt_status)) {
+ if (!NT_STATUS_IS_OK(status)) {
goto server_response;
}
+ } else {
+ status = NT_STATUS_OK;
+ }
- 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.negTokenTarg.mechListMIC.length > 0) {
- new_spnego = true;
- }
-
- if (have_sign && new_spnego) {
- spnego_state->needs_mic_check = true;
- spnego_state->needs_mic_sign = true;
- }
-
- if (have_sign && 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;
- }
+ 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;
+ }
- 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_free_data(&spnego);
+ 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 gensec_security *gensec;
struct spnego_state *spnego;
DATA_BLOB full_in;
+ struct spnego_data _spnego_in;
+ struct spnego_data *spnego_in;
NTSTATUS status;
DATA_BLOB out;
};
struct tevent_req *req = NULL;
struct gensec_spnego_update_state *state = NULL;
NTSTATUS status;
+ ssize_t len;
req = tevent_req_create(mem_ctx, &state,
struct gensec_spnego_update_state);
status = gensec_spnego_update_out(gensec_security,
state, &state->out);
- 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)) {
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
+ state->status = status;
tevent_req_done(req);
return tevent_req_post(req, ev);
}
return tevent_req_post(req, ev);
}
+ /* Check if we got a valid SPNEGO blob... */
+
+ switch (spnego_state->state_position) {
+ case SPNEGO_FALLBACK:
+ break;
+
+ 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);
+ }
+
+ /* fall through */
+ case SPNEGO_CLIENT_START:
+ case SPNEGO_SERVER_START:
+
+ if (state->full_in.length == 0) {
+ /* create_negTokenInit later */
+ break;
+ }
+
+ 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);
+ }
+
+ /*
+ * 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);
+ }
+
+ /*
+ * We'll continue with SPNEGO_FALLBACK below...
+ */
+ break;
+ }
+ state->spnego_in = &state->_spnego_in;
+
+ /* 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);
+ }
+
+ break;
+
+ default:
+ smb_panic(__location__);
+ return NULL;
+ }
+
/* and switch into the state machine */
switch (spnego_state->state_position) {
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;
+ }
+
+ 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_update_client(gensec_security,
- state, ev,
- state->full_in,
- &spnego_state->out_frag);
+ status = gensec_spnego_client_negTokenTarg(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &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;
+ }
+
+ status = gensec_spnego_server_negTokenInit(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &spnego_state->out_frag);
+ break;
+
case SPNEGO_SERVER_TARG:
- status = gensec_spnego_update_server(gensec_security,
- state, ev,
- state->full_in,
- &spnego_state->out_frag);
+ status = gensec_spnego_server_negTokenTarg(gensec_security,
+ spnego_state, ev,
+ state->spnego_in, state,
+ &spnego_state->out_frag);
break;
default:
return NULL;
}
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
+ }
+
if (NT_STATUS_IS_OK(status)) {
bool reset_full = true;
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)) {
- tevent_req_nterror(req, status);
- return tevent_req_post(req, ev);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
}
spnego_state->out_status = status;
status = gensec_spnego_update_out(gensec_security,
state, &state->out);
- 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)) {
+ if (GENSEC_UPDATE_IS_NTERROR(status)) {
+ tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
+ state->status = status;
tevent_req_done(req);
return tevent_req_post(req, ev);
}