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 "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"
+
+struct schannel_key_state {
+ struct dcerpc_pipe *pipe;
+ struct dcerpc_pipe *pipe2;
+ struct dcerpc_binding *binding;
+ struct cli_credentials *credentials;
+ struct creds_CredentialState *creds;
+ uint32_t 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 rpc_request *req);
+static void continue_srv_auth2(struct rpc_request *req);
+
/*
- 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;
}
- /*
- step 1 - establish a netlogon connection, with no authentication
- */
+ /* 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;
- /* 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;
- }
+ composite_continue(c, sec_conn_req, continue_secondary_connection, c);
+}
- /* Make binding string for netlogon, not the other pipe */
- status = dcerpc_epm_map_binding(tmp_ctx, b,
- DCERPC_NETLOGON_UUID, DCERPC_NETLOGON_VERSION,
- p->conn->event_ctx);
- 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 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;
- status = dcerpc_bind_auth_none(p2, DCERPC_NETLOGON_UUID,
- DCERPC_NETLOGON_VERSION);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(p2);
- return status;
- }
+ 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 rpc_request *srv_challenge_req;
+
+ 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.credentials = &s->credentials2;
+
+ generate_random_buffer(s->credentials1.data, sizeof(s->credentials1.data));
/*
- step 2 - request a netlogon challenge
+ request a netlogon challenge - a rpc request over opened 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;
+ srv_challenge_req = dcerpc_netr_ServerReqChallenge_send(s->pipe2, c, &s->r);
+ if (composite_nomem(srv_challenge_req, c)) return;
- generate_random_buffer(credentials1.data, sizeof(credentials1.data));
+ composite_continue_rpc(c, srv_challenge_req, continue_srv_challenge, c);
+}
- status = dcerpc_netr_ServerReqChallenge(p2, tmp_ctx, &r);
- 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 rpc_request *req)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+ struct rpc_request *srv_auth2_req;
+
+ c = talloc_get_type(req->async.private_data, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive rpc request result - netlogon challenge */
+ c->status = dcerpc_ndr_request_recv(req);
+ if (!composite_is_ok(c)) return;
+
+ /* prepare credentials for auth2 request */
+ s->mach_pwd = cli_credentials_get_nt_hash(s->credentials, c);
+
+ creds_client_init(s->creds, &s->credentials1, &s->credentials2,
+ s->mach_pwd, &s->credentials3, s->negotiate_flags);
+
+ /* 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->negotiate_flags;
+ s->a.in.credentials = &s->credentials3;
+ s->a.out.negotiate_flags = &s->negotiate_flags;
+ s->a.out.credentials = &s->credentials3;
/*
- step 3 - authenticate on the netlogon pipe
+ authenticate on the netlogon pipe - a rpc request over secondary pipe
*/
- E_md4hash(cli_credentials_get_password(credentials), mach_pwd.hash);
- creds_client_init(creds, &credentials1, &credentials2,
- &mach_pwd, &credentials3,
- negotiate_flags);
-
- 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;
-
- status = dcerpc_netr_ServerAuthenticate2(p2, tmp_ctx, &a);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
+ srv_auth2_req = dcerpc_netr_ServerAuthenticate2_send(s->pipe2, c, &s->a);
+ if (composite_nomem(srv_auth2_req, c)) return;
+
+ composite_continue_rpc(c, srv_auth2_req, continue_srv_auth2, c);
+}
+
+
+/*
+ Stage 6 of schannel_key: Receive authentication request result and verify
+ received credentials
+*/
+static void continue_srv_auth2(struct rpc_request *req)
+{
+ struct composite_context *c;
+ struct schannel_key_state *s;
+
+ c = talloc_get_type(req->async.private_data, struct composite_context);
+ s = talloc_get_type(c->private_data, struct schannel_key_state);
+
+ /* receive rpc request result - auth2 credentials */
+ c->status = dcerpc_ndr_request_recv(req);
+ if (!composite_is_ok(c)) return;
+
+ /* verify credentials */
+ if (!creds_client_check(s->creds, s->a.out.credentials)) {
+ composite_error(c, NT_STATUS_UNSUCCESSFUL);
+ return;
}
- if (!creds_client_check(creds, a.out.credentials)) {
- return NT_STATUS_UNSUCCESSFUL;
+ /* setup current netlogon credentials */
+ cli_credentials_set_netlogon_creds(s->credentials, s->creds);
+
+ composite_done(c);
+}
+
+
+/*
+ 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 composite_context *c;
+ struct schannel_key_state *s;
+ struct composite_context *epm_map_req;
+
+ /* 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;
+
+ /* allocate credentials */
+ s->creds = talloc(c, struct creds_CredentialState);
+ if (composite_nomem(s->creds, c)) return c;
+
+ /* type of authentication depends on schannel type */
+ if (s->pipe->conn->flags & DCERPC_SCHANNEL_128) {
+ s->negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+ } else {
+ s->negotiate_flags = NETLOGON_NEG_AUTH2_FLAGS;
}
- cli_credentials_set_netlogon_creds(credentials, creds);
+ /* allocate binding structure */
+ s->binding = talloc(c, struct dcerpc_binding);
+ if (composite_nomem(s->binding, c)) return c;
- /*
- the schannel session key is now in creds.session_key
+ *s->binding = *s->pipe->binding;
- we no longer need the netlogon pipe open
- */
- talloc_free(p2);
+ /* request the netlogon endpoint mapping */
+ epm_map_req = dcerpc_epm_map_binding_send(c, s->binding,
+ &ndr_table_netlogon,
+ s->pipe->conn->event_ctx);
+ if (composite_nomem(epm_map_req, c)) return c;
- return NT_STATUS_OK;
+ 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;
+ uint8_t auth_level;
+};
+
- /* 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)) {
+
+/*
+ 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);
+
+ /* receive schannel key */
+ c->status = dcerpc_schannel_key_recv(ctx);
+ if (!composite_is_ok(c)) {
DEBUG(1, ("Failed to setup credentials for account %s: %s\n",
- cli_credentials_get_username(credentials),
- nt_errstr(status)));
- return status;
+ cli_credentials_get_username(s->credentials), nt_errstr(c->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,
+ 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);
+
+ c->status = dcerpc_bind_auth_recv(ctx);
+ if (!composite_is_ok(c)) return;
+
+ 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,
+ 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;
+
+ /* start getting schannel key first */
+ schan_key_req = dcerpc_schannel_key_send(c, p, credentials);
+ 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
+ */
+NTSTATUS dcerpc_bind_auth_schannel(TALLOC_CTX *tmp_ctx,
+ struct dcerpc_pipe *p,
+ const struct ndr_interface_table *table,
+ struct cli_credentials *credentials,
+ uint8_t auth_level)
+{
+ struct composite_context *c;
+
+ c = dcerpc_bind_auth_schannel_send(tmp_ctx, p, table, credentials,
+ auth_level);
+ return dcerpc_bind_auth_schannel_recv(c);
+}
git.samba.org / ira / wip.git / blobdiff