Copyright (C) Andrew Tridgell 2004
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
+ Copyright (C) Rafal Szczesniak 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
-#include "librpc/gen_ndr/ndr_schannel.h"
+#include <tevent.h>
#include "auth/auth.h"
+#include "libcli/composite/composite.h"
+#include "libcli/auth/libcli_auth.h"
+#include "librpc/gen_ndr/ndr_netlogon.h"
+#include "librpc/gen_ndr/ndr_netlogon_c.h"
+#include "auth/credentials/credentials.h"
+#include "librpc/rpc/dcerpc_proto.h"
+#include "param/param.h"
+
+struct schannel_key_state {
+ struct dcerpc_pipe *pipe;
+ struct dcerpc_pipe *pipe2;
+ struct dcerpc_binding *binding;
+ bool dcerpc_schannel_auto;
+ struct cli_credentials *credentials;
+ struct netlogon_creds_CredentialState *creds;
+ uint32_t local_negotiate_flags;
+ uint32_t remote_negotiate_flags;
+ struct netr_Credential credentials1;
+ struct netr_Credential credentials2;
+ struct netr_Credential credentials3;
+ struct netr_ServerReqChallenge r;
+ struct netr_ServerAuthenticate2 a;
+ const struct samr_Password *mach_pwd;
+};
+
+
+static void continue_secondary_connection(struct composite_context *ctx);
+static void continue_bind_auth_none(struct composite_context *ctx);
+static void continue_srv_challenge(struct tevent_req *subreq);
+static void continue_srv_auth2(struct tevent_req *subreq);
+static void continue_get_capabilities(struct tevent_req *subreq);
+
/*
- get a schannel key using a netlogon challenge on a secondary pipe
+ Stage 2 of schannel_key: Receive endpoint mapping and request secondary
+ rpc connection
*/
-static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
- struct dcerpc_pipe *p,
- struct cli_credentials *credentials)
+static void continue_epm_map_binding(struct composite_context *ctx)
{
- NTSTATUS status;
- struct dcerpc_binding *b;
- struct dcerpc_pipe *p2;
- struct netr_ServerReqChallenge r;
- struct netr_ServerAuthenticate2 a;
- struct netr_Credential credentials1, credentials2, credentials3;
- struct samr_Password mach_pwd;
- uint32_t negotiate_flags;
- struct creds_CredentialState *creds;
- creds = talloc(tmp_ctx, struct creds_CredentialState);
- if (!creds) {
- return NT_STATUS_NO_MEMORY;
- }
+ struct composite_context *c;
+ struct schannel_key_state *s;
+ struct composite_context *sec_conn_req;
- if (p->conn->flags & DCERPC_SCHANNEL_128) {
- negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
- } else {
- negotiate_flags = NETLOGON_NEG_AUTH2_FLAGS;
+ c = talloc_get_type(ctx->async.private_data, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive endpoint mapping */
+ c->status = dcerpc_epm_map_binding_recv(ctx);
+ if (!NT_STATUS_IS_OK(c->status)) {
+ DEBUG(0,("Failed to map DCERPC/TCP NCACN_NP pipe for '%s' - %s\n",
+ NDR_NETLOGON_UUID, nt_errstr(c->status)));
+ composite_error(c, c->status);
+ return;
}
+ /* send a request for secondary rpc connection */
+ sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
+ s->binding);
+ if (composite_nomem(sec_conn_req, c)) return;
+
+ composite_continue(c, sec_conn_req, continue_secondary_connection, c);
+}
+
+
+/*
+ Stage 3 of schannel_key: Receive secondary rpc connection and perform
+ non-authenticated bind request
+*/
+static void continue_secondary_connection(struct composite_context *ctx)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+ struct composite_context *auth_none_req;
+
+ c = talloc_get_type(ctx->async.private_data, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive secondary rpc connection */
+ c->status = dcerpc_secondary_connection_recv(ctx, &s->pipe2);
+ if (!composite_is_ok(c)) return;
+
+ talloc_steal(s, s->pipe2);
+
+ /* initiate a non-authenticated bind */
+ auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe2, &ndr_table_netlogon);
+ if (composite_nomem(auth_none_req, c)) return;
+
+ composite_continue(c, auth_none_req, continue_bind_auth_none, c);
+}
+
+
+/*
+ Stage 4 of schannel_key: Receive non-authenticated bind and get
+ a netlogon challenge
+*/
+static void continue_bind_auth_none(struct composite_context *ctx)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+ struct tevent_req *subreq;
+
+ c = talloc_get_type(ctx->async.private_data, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive result of non-authenticated bind request */
+ c->status = dcerpc_bind_auth_none_recv(ctx);
+ if (!composite_is_ok(c)) return;
+
+ /* prepare a challenge request */
+ s->r.in.server_name = talloc_asprintf(c, "\\\\%s", dcerpc_server_name(s->pipe));
+ if (composite_nomem(s->r.in.server_name, c)) return;
+ s->r.in.computer_name = cli_credentials_get_workstation(s->credentials);
+ s->r.in.credentials = &s->credentials1;
+ s->r.out.return_credentials = &s->credentials2;
+
+ generate_random_buffer(s->credentials1.data, sizeof(s->credentials1.data));
+
/*
- step 1 - establish a netlogon connection, with no authentication
+ request a netlogon challenge - a rpc request over opened secondary pipe
*/
+ subreq = dcerpc_netr_ServerReqChallenge_r_send(s, c->event_ctx,
+ s->pipe2->binding_handle,
+ &s->r);
+ if (composite_nomem(subreq, c)) return;
- /* Find the original binding string */
- status = dcerpc_parse_binding(tmp_ctx, p->conn->binding_string, &b);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("Failed to parse dcerpc binding '%s'\n", p->conn->binding_string));
- return status;
- }
+ tevent_req_set_callback(subreq, continue_srv_challenge, c);
+}
- /* Make binding string for netlogon, not the other pipe */
- status = dcerpc_epm_map_binding(tmp_ctx, b, DCERPC_NETLOGON_UUID, DCERPC_NETLOGON_VERSION);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("Failed to map DCERPC/TCP NCACN_NP pipe for '%s' - %s\n",
- DCERPC_NETLOGON_UUID, nt_errstr(status)));
- return status;
- }
- status = dcerpc_secondary_connection(p, &p2, b);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+/*
+ Stage 5 of schannel_key: Receive a challenge and perform authentication
+ on the netlogon pipe
+*/
+static void continue_srv_challenge(struct tevent_req *subreq)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+
+ c = tevent_req_callback_data(subreq, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive rpc request result - netlogon challenge */
+ c->status = dcerpc_netr_ServerReqChallenge_r_recv(subreq, s);
+ TALLOC_FREE(subreq);
+ if (!composite_is_ok(c)) return;
+
+ /* prepare credentials for auth2 request */
+ s->mach_pwd = cli_credentials_get_nt_hash(s->credentials, c);
- status = dcerpc_bind_auth_none(p2, DCERPC_NETLOGON_UUID,
- DCERPC_NETLOGON_VERSION);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(p2);
- return status;
- }
+ /* auth2 request arguments */
+ s->a.in.server_name = s->r.in.server_name;
+ s->a.in.account_name = cli_credentials_get_username(s->credentials);
+ s->a.in.secure_channel_type =
+ cli_credentials_get_secure_channel_type(s->credentials);
+ s->a.in.computer_name = cli_credentials_get_workstation(s->credentials);
+ s->a.in.negotiate_flags = &s->local_negotiate_flags;
+ s->a.in.credentials = &s->credentials3;
+ s->a.out.negotiate_flags = &s->remote_negotiate_flags;
+ s->a.out.return_credentials = &s->credentials3;
+ s->creds = netlogon_creds_client_init(s,
+ s->a.in.account_name,
+ s->a.in.computer_name,
+ s->a.in.secure_channel_type,
+ &s->credentials1, &s->credentials2,
+ s->mach_pwd, &s->credentials3,
+ s->local_negotiate_flags);
+ if (composite_nomem(s->creds, c)) {
+ return;
+ }
/*
- step 2 - request a netlogon challenge
+ authenticate on the netlogon pipe - a rpc request over secondary pipe
*/
- r.in.server_name = talloc_asprintf(tmp_ctx, "\\\\%s", dcerpc_server_name(p));
- r.in.computer_name = cli_credentials_get_workstation(credentials);
- r.in.credentials = &credentials1;
- r.out.credentials = &credentials2;
+ subreq = dcerpc_netr_ServerAuthenticate2_r_send(s, c->event_ctx,
+ s->pipe2->binding_handle,
+ &s->a);
+ if (composite_nomem(subreq, c)) return;
+
+ tevent_req_set_callback(subreq, continue_srv_auth2, c);
+}
- generate_random_buffer(credentials1.data, sizeof(credentials1.data));
- status = dcerpc_netr_ServerReqChallenge(p2, tmp_ctx, &r);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+/*
+ Stage 6 of schannel_key: Receive authentication request result and verify
+ received credentials
+*/
+static void continue_srv_auth2(struct tevent_req *subreq)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+
+ c = tevent_req_callback_data(subreq, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive rpc request result - auth2 credentials */
+ c->status = dcerpc_netr_ServerAuthenticate2_r_recv(subreq, s);
+ TALLOC_FREE(subreq);
+ if (!composite_is_ok(c)) return;
+
+ if (!NT_STATUS_EQUAL(s->a.out.result, NT_STATUS_ACCESS_DENIED) &&
+ !NT_STATUS_IS_OK(s->a.out.result)) {
+ composite_error(c, s->a.out.result);
+ return;
}
/*
- step 3 - authenticate on the netlogon pipe
- */
- E_md4hash(cli_credentials_get_password(credentials), mach_pwd.hash);
- creds_client_init(creds, &credentials1, &credentials2,
- &mach_pwd, &credentials3,
- negotiate_flags);
+ * Strong keys could be unsupported (NT4) or disables. So retry with the
+ * flags returned by the server. - asn
+ */
+ if (NT_STATUS_EQUAL(s->a.out.result, NT_STATUS_ACCESS_DENIED)) {
+ uint32_t lf = s->local_negotiate_flags;
+ const char *ln = NULL;
+ uint32_t rf = s->remote_negotiate_flags;
+ const char *rn = NULL;
+
+ if (!s->dcerpc_schannel_auto) {
+ composite_error(c, s->a.out.result);
+ return;
+ }
+ s->dcerpc_schannel_auto = false;
+
+ if (lf & NETLOGON_NEG_SUPPORTS_AES) {
+ ln = "aes";
+ if (rf & NETLOGON_NEG_SUPPORTS_AES) {
+ composite_error(c, s->a.out.result);
+ return;
+ }
+ } else if (lf & NETLOGON_NEG_STRONG_KEYS) {
+ ln = "strong";
+ if (rf & NETLOGON_NEG_STRONG_KEYS) {
+ composite_error(c, s->a.out.result);
+ return;
+ }
+ } else {
+ ln = "des";
+ }
+
+ if (rf & NETLOGON_NEG_SUPPORTS_AES) {
+ rn = "aes";
+ } else if (rf & NETLOGON_NEG_STRONG_KEYS) {
+ rn = "strong";
+ } else {
+ rn = "des";
+ }
+
+ DEBUG(3, ("Server doesn't support %s keys, downgrade to %s"
+ "and retry! local[0x%08X] remote[0x%08X]\n",
+ ln, rn, lf, rf));
- a.in.server_name = r.in.server_name;
- a.in.account_name = cli_credentials_get_username(credentials);
- a.in.secure_channel_type =
- cli_credentials_get_secure_channel_type(credentials);
- a.in.computer_name = cli_credentials_get_workstation(credentials);
- a.in.negotiate_flags = &negotiate_flags;
- a.out.negotiate_flags = &negotiate_flags;
- a.in.credentials = &credentials3;
- a.out.credentials = &credentials3;
+ s->local_negotiate_flags = s->remote_negotiate_flags;
- status = dcerpc_netr_ServerAuthenticate2(p2, tmp_ctx, &a);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+ generate_random_buffer(s->credentials1.data,
+ sizeof(s->credentials1.data));
+
+ subreq = dcerpc_netr_ServerReqChallenge_r_send(s,
+ c->event_ctx,
+ s->pipe2->binding_handle,
+ &s->r);
+ if (composite_nomem(subreq, c)) return;
+
+ tevent_req_set_callback(subreq, continue_srv_challenge, c);
+ return;
}
- if (!creds_client_check(creds, a.out.credentials)) {
- return NT_STATUS_UNSUCCESSFUL;
+ s->creds->negotiate_flags = s->remote_negotiate_flags;
+
+ /* verify credentials */
+ if (!netlogon_creds_client_check(s->creds, s->a.out.return_credentials)) {
+ composite_error(c, NT_STATUS_UNSUCCESSFUL);
+ return;
}
- cli_credentials_set_netlogon_creds(credentials, creds);
+ /* setup current netlogon credentials */
+ cli_credentials_set_netlogon_creds(s->credentials, s->creds);
- /*
- the schannel session key is now in creds.session_key
+ composite_done(c);
+}
- we no longer need the netlogon pipe open
- */
- talloc_free(p2);
+/*
+ Initiate establishing a schannel key using netlogon challenge
+ on a secondary pipe
+*/
+struct composite_context *dcerpc_schannel_key_send(TALLOC_CTX *mem_ctx,
+ struct dcerpc_pipe *p,
+ struct cli_credentials *credentials,
+ struct loadparm_context *lp_ctx)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+ struct composite_context *epm_map_req;
+ enum netr_SchannelType schannel_type = cli_credentials_get_secure_channel_type(credentials);
+
+ /* composite context allocation and setup */
+ c = composite_create(mem_ctx, p->conn->event_ctx);
+ if (c == NULL) return NULL;
+
+ s = talloc_zero(c, struct schannel_key_state);
+ if (composite_nomem(s, c)) return c;
+ c->private_data = s;
+
+ /* store parameters in the state structure */
+ s->pipe = p;
+ s->credentials = credentials;
+ s->local_negotiate_flags = NETLOGON_NEG_AUTH2_FLAGS;
+
+ /* allocate credentials */
+ if (s->pipe->conn->flags & DCERPC_SCHANNEL_128) {
+ s->local_negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+ }
+ if (s->pipe->conn->flags & DCERPC_SCHANNEL_AES) {
+ s->local_negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+ s->local_negotiate_flags |= NETLOGON_NEG_SUPPORTS_AES;
+ }
+ if (s->pipe->conn->flags & DCERPC_SCHANNEL_AUTO) {
+ s->local_negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+ s->local_negotiate_flags |= NETLOGON_NEG_SUPPORTS_AES;
+ s->dcerpc_schannel_auto = true;
+ }
+
+ /* type of authentication depends on schannel type */
+ if (schannel_type == SEC_CHAN_RODC) {
+ s->local_negotiate_flags |= NETLOGON_NEG_RODC_PASSTHROUGH;
+ }
+
+ /* allocate binding structure */
+ s->binding = talloc_zero(c, struct dcerpc_binding);
+ if (composite_nomem(s->binding, c)) return c;
- return NT_STATUS_OK;
+ *s->binding = *s->pipe->binding;
+
+ /* request the netlogon endpoint mapping */
+ epm_map_req = dcerpc_epm_map_binding_send(c, s->binding,
+ &ndr_table_netlogon,
+ s->pipe->conn->event_ctx,
+ lp_ctx);
+ if (composite_nomem(epm_map_req, c)) return c;
+
+ composite_continue(c, epm_map_req, continue_epm_map_binding, c);
+ return c;
}
-NTSTATUS dcerpc_bind_auth_schannel(TALLOC_CTX *tmp_ctx,
- struct dcerpc_pipe *p,
- const char *uuid, uint_t version,
- struct cli_credentials *credentials)
+
+/*
+ Receive result of schannel key request
+ */
+NTSTATUS dcerpc_schannel_key_recv(struct composite_context *c)
{
- NTSTATUS status;
+ NTSTATUS status = composite_wait(c);
+
+ talloc_free(c);
+ return status;
+}
+
+
+struct auth_schannel_state {
+ struct dcerpc_pipe *pipe;
+ struct cli_credentials *credentials;
+ const struct ndr_interface_table *table;
+ struct loadparm_context *lp_ctx;
+ uint8_t auth_level;
+ struct netlogon_creds_CredentialState *creds_state;
+ struct netlogon_creds_CredentialState save_creds_state;
+ struct netr_Authenticator auth;
+ struct netr_Authenticator return_auth;
+ union netr_Capabilities capabilities;
+ struct netr_LogonGetCapabilities c;
+};
+
- /* Fills in NETLOGON credentials */
- status = dcerpc_schannel_key(tmp_ctx,
- p, credentials);
+static void continue_bind_auth(struct composite_context *ctx);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to setup credentials for account %s: %s\n",
- cli_credentials_get_username(credentials),
- nt_errstr(status)));
- return status;
+
+/*
+ Stage 2 of auth_schannel: Receive schannel key and intitiate an
+ authenticated bind using received credentials
+ */
+static void continue_schannel_key(struct composite_context *ctx)
+{
+ struct composite_context *auth_req;
+ struct composite_context *c = talloc_get_type(ctx->async.private_data,
+ struct composite_context);
+ struct auth_schannel_state *s = talloc_get_type(c->private_data,
+ struct auth_schannel_state);
+ NTSTATUS status;
+
+ /* receive schannel key */
+ status = c->status = dcerpc_schannel_key_recv(ctx);
+ if (!composite_is_ok(c)) {
+ DEBUG(1, ("Failed to setup credentials: %s\n", nt_errstr(status)));
+ return;
}
- return dcerpc_bind_auth_password(p, uuid, version,
- credentials, DCERPC_AUTH_TYPE_SCHANNEL,
+ /* send bind auth request with received creds */
+ auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table, s->credentials,
+ lpcfg_gensec_settings(c, s->lp_ctx),
+ DCERPC_AUTH_TYPE_SCHANNEL, s->auth_level,
NULL);
+ if (composite_nomem(auth_req, c)) return;
+
+ composite_continue(c, auth_req, continue_bind_auth, c);
+}
+
+
+/*
+ Stage 3 of auth_schannel: Receivce result of authenticated bind
+ and say if we're done ok.
+*/
+static void continue_bind_auth(struct composite_context *ctx)
+{
+ struct composite_context *c = talloc_get_type(ctx->async.private_data,
+ struct composite_context);
+ struct auth_schannel_state *s = talloc_get_type(c->private_data,
+ struct auth_schannel_state);
+ struct tevent_req *subreq;
+
+ c->status = dcerpc_bind_auth_recv(ctx);
+ if (!composite_is_ok(c)) return;
+
+ /* if we have a AES encrypted connection, verify the capabilities */
+ if (ndr_syntax_id_equal(&s->table->syntax_id,
+ &ndr_table_netlogon.syntax_id)) {
+ ZERO_STRUCT(s->return_auth);
+
+ s->creds_state = cli_credentials_get_netlogon_creds(s->credentials);
+ if (composite_nomem(s->creds_state, c)) return;
+
+ s->save_creds_state = *s->creds_state;
+ netlogon_creds_client_authenticator(&s->save_creds_state, &s->auth);
+
+ s->c.in.server_name = talloc_asprintf(c,
+ "\\\\%s",
+ dcerpc_server_name(s->pipe));
+ if (composite_nomem(s->c.in.server_name, c)) return;
+ s->c.in.computer_name = cli_credentials_get_workstation(s->credentials);
+ s->c.in.credential = &s->auth;
+ s->c.in.return_authenticator = &s->return_auth;
+ s->c.in.query_level = 1;
+
+ s->c.out.capabilities = &s->capabilities;
+ s->c.out.return_authenticator = &s->return_auth;
+
+ DEBUG(5, ("We established a AES connection, verifying logon "
+ "capabilities\n"));
+
+ subreq = dcerpc_netr_LogonGetCapabilities_r_send(s,
+ c->event_ctx,
+ s->pipe->binding_handle,
+ &s->c);
+ if (composite_nomem(subreq, c)) return;
+
+ tevent_req_set_callback(subreq, continue_get_capabilities, c);
+ return;
+ }
+
+ composite_done(c);
+}
+
+/*
+ Stage 4 of auth_schannel: Get the Logon Capablities and verify them.
+*/
+static void continue_get_capabilities(struct tevent_req *subreq)
+{
+ struct composite_context *c;
+ struct auth_schannel_state *s;
+
+ c = tevent_req_callback_data(subreq, struct composite_context);
+ s = talloc_get_type(c->private_data, struct auth_schannel_state);
+
+ /* receive rpc request result */
+ c->status = dcerpc_netr_LogonGetCapabilities_r_recv(subreq, s);
+ TALLOC_FREE(subreq);
+ if (NT_STATUS_EQUAL(c->status, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) {
+ if (s->creds_state->negotiate_flags & NETLOGON_NEG_SUPPORTS_AES) {
+ composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ } else {
+ /* This is probably NT */
+ composite_done(c);
+ return;
+ }
+ } else if (!composite_is_ok(c)) {
+ return;
+ }
+
+ if (NT_STATUS_EQUAL(s->c.out.result, NT_STATUS_NOT_IMPLEMENTED)) {
+ if (s->creds_state->negotiate_flags & NETLOGON_NEG_SUPPORTS_AES) {
+ /* This means AES isn't supported. */
+ composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ }
+
+ /* This is probably an old Samba version */
+ composite_done(c);
+ return;
+ }
+
+ /* verify credentials */
+ if (!netlogon_creds_client_check(&s->save_creds_state,
+ &s->c.out.return_authenticator->cred)) {
+ composite_error(c, NT_STATUS_UNSUCCESSFUL);
+ return;
+ }
+
+ *s->creds_state = s->save_creds_state;
+
+ if (!NT_STATUS_IS_OK(s->c.out.result)) {
+ composite_error(c, s->c.out.result);
+ return;
+ }
+
+ /* compare capabilities */
+ if (s->creds_state->negotiate_flags != s->capabilities.server_capabilities) {
+ DEBUG(2, ("The client capabilities don't match the server "
+ "capabilities: local[0x%08X] remote[0x%08X]\n",
+ s->creds_state->negotiate_flags,
+ s->capabilities.server_capabilities));
+ composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ }
+
+ /* TODO: Add downgrade dectection. */
+
+ composite_done(c);
}
+
+/*
+ Initiate schannel authentication request
+*/
+struct composite_context *dcerpc_bind_auth_schannel_send(TALLOC_CTX *tmp_ctx,
+ struct dcerpc_pipe *p,
+ const struct ndr_interface_table *table,
+ struct cli_credentials *credentials,
+ struct loadparm_context *lp_ctx,
+ uint8_t auth_level)
+{
+ struct composite_context *c;
+ struct auth_schannel_state *s;
+ struct composite_context *schan_key_req;
+
+ /* composite context allocation and setup */
+ c = composite_create(tmp_ctx, p->conn->event_ctx);
+ if (c == NULL) return NULL;
+
+ s = talloc_zero(c, struct auth_schannel_state);
+ if (composite_nomem(s, c)) return c;
+ c->private_data = s;
+
+ /* store parameters in the state structure */
+ s->pipe = p;
+ s->credentials = credentials;
+ s->table = table;
+ s->auth_level = auth_level;
+ s->lp_ctx = lp_ctx;
+
+ /* start getting schannel key first */
+ schan_key_req = dcerpc_schannel_key_send(c, p, credentials, lp_ctx);
+ if (composite_nomem(schan_key_req, c)) return c;
+
+ composite_continue(c, schan_key_req, continue_schannel_key, c);
+ return c;
+}
+
+
+/*
+ Receive result of schannel authentication request
+*/
+NTSTATUS dcerpc_bind_auth_schannel_recv(struct composite_context *c)
+{
+ NTSTATUS status = composite_wait(c);
+
+ talloc_free(c);
+ return status;
+}
+
+
+/*
+ Perform schannel authenticated bind - sync version
+ */
+_PUBLIC_ NTSTATUS dcerpc_bind_auth_schannel(TALLOC_CTX *tmp_ctx,
+ struct dcerpc_pipe *p,
+ const struct ndr_interface_table *table,
+ struct cli_credentials *credentials,
+ struct loadparm_context *lp_ctx,
+ uint8_t auth_level)
+{
+ struct composite_context *c;
+
+ c = dcerpc_bind_auth_schannel_send(tmp_ctx, p, table, credentials, lp_ctx,
+ auth_level);
+ return dcerpc_bind_auth_schannel_recv(c);
+}
git.samba.org / metze / samba / wip.git / blobdiff