wmi-1.3.16 from opsview.com
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Are Casilla
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/*
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Unix SMB/CIFS implementation.
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dcerpc schannel operations
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Copyright (C) Andrew Tridgell 2004
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "librpc/gen_ndr/ndr_schannel.h"
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#include "auth/auth.h"
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#include "auth/credentials/credentials.h"
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#include "auth/gensec/gensec.h"
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#include "auth/gensec/schannel.h"
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#include "auth/gensec/schannel_state.h"
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#include "auth/gensec/schannel_proto.h"
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#include "librpc/rpc/dcerpc.h"
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static size_t schannel_sig_size(struct gensec_security *gensec_security, size_t data_size)
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{
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return 32;
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}
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static NTSTATUS schannel_session_key(struct gensec_security *gensec_security,
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DATA_BLOB *session_key)
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{
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return NT_STATUS_NOT_IMPLEMENTED;
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}
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static NTSTATUS schannel_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
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const DATA_BLOB in, DATA_BLOB *out)
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{
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struct schannel_state *state = gensec_security->private_data;
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NTSTATUS status;
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struct schannel_bind bind_schannel;
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struct schannel_bind_ack bind_schannel_ack;
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struct creds_CredentialState *creds;
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const char *workstation;
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const char *domain;
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*out = data_blob(NULL, 0);
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switch (gensec_security->gensec_role) {
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case GENSEC_CLIENT:
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if (state->state != SCHANNEL_STATE_START) {
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/* we could parse the bind ack, but we don't know what it is yet */
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return NT_STATUS_OK;
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}
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state->creds = talloc_reference(state, cli_credentials_get_netlogon_creds(gensec_security->credentials));
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bind_schannel.unknown1 = 0;
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#if 0
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/* to support this we'd need to have access to the full domain name */
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bind_schannel.bind_type = 23;
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bind_schannel.u.info23.domain = cli_credentials_get_domain(gensec_security->credentials);
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bind_schannel.u.info23.workstation = cli_credentials_get_workstation(gensec_security->credentials);
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bind_schannel.u.info23.dnsdomain = cli_credentials_get_realm(gensec_security->credentials);
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/* w2k3 refuses us if we use the full DNS workstation?
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why? perhaps because we don't fill in the dNSHostName
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attribute in the machine account? */
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bind_schannel.u.info23.dnsworkstation = cli_credentials_get_workstation(gensec_security->credentials);
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#else
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bind_schannel.bind_type = 3;
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bind_schannel.u.info3.domain = cli_credentials_get_domain(gensec_security->credentials);
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bind_schannel.u.info3.workstation = cli_credentials_get_workstation(gensec_security->credentials);
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#endif
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status = ndr_push_struct_blob(out, out_mem_ctx, &bind_schannel,
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(ndr_push_flags_fn_t)ndr_push_schannel_bind);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("Could not create schannel bind: %s\n",
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nt_errstr(status)));
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return status;
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}
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state->state = SCHANNEL_STATE_UPDATE_1;
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return NT_STATUS_MORE_PROCESSING_REQUIRED;
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case GENSEC_SERVER:
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if (state->state != SCHANNEL_STATE_START) {
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/* no third leg on this protocol */
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* parse the schannel startup blob */
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status = ndr_pull_struct_blob(&in, out_mem_ctx, &bind_schannel,
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(ndr_pull_flags_fn_t)ndr_pull_schannel_bind);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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if (bind_schannel.bind_type == 23) {
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workstation = bind_schannel.u.info23.workstation;
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domain = bind_schannel.u.info23.domain;
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} else {
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workstation = bind_schannel.u.info3.workstation;
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domain = bind_schannel.u.info3.domain;
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}
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/* pull the session key for this client */
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status = schannel_fetch_session_key(out_mem_ctx, workstation,
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domain, &creds);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("Could not find session key for attempted schannel connection from %s: %s\n",
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workstation, nt_errstr(status)));
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return status;
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}
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state->creds = talloc_reference(state, creds);
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bind_schannel_ack.unknown1 = 1;
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bind_schannel_ack.unknown2 = 0;
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bind_schannel_ack.unknown3 = 0x6c0000;
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status = ndr_push_struct_blob(out, out_mem_ctx, &bind_schannel_ack,
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(ndr_push_flags_fn_t)ndr_push_schannel_bind_ack);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("Could not return schannel bind ack for client %s: %s\n",
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workstation, nt_errstr(status)));
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return status;
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}
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state->state = SCHANNEL_STATE_UPDATE_1;
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return NT_STATUS_OK;
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}
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return NT_STATUS_INVALID_PARAMETER;
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}
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/**
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* Return the struct creds_CredentialState.
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*
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* Make sure not to call this unless gensec is using schannel...
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*/
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/* TODO: make this non-public */
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_PUBLIC_ NTSTATUS dcerpc_schannel_creds(struct gensec_security *gensec_security,
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TALLOC_CTX *mem_ctx,
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struct creds_CredentialState **creds)
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{
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struct schannel_state *state = talloc_get_type(gensec_security->private_data, struct schannel_state);
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*creds = talloc_reference(mem_ctx, state->creds);
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if (!*creds) {
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return NT_STATUS_NO_MEMORY;
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}
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return NT_STATUS_OK;
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}
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/**
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* Returns anonymous credentials for schannel, matching Win2k3.
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*
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*/
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static NTSTATUS schannel_session_info(struct gensec_security *gensec_security,
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struct auth_session_info **_session_info)
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{
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struct schannel_state *state = talloc_get_type(gensec_security->private_data, struct schannel_state);
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return auth_anonymous_session_info(state, _session_info);
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}
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static NTSTATUS schannel_start(struct gensec_security *gensec_security)
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{
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struct schannel_state *state;
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state = talloc(gensec_security, struct schannel_state);
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if (!state) {
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return NT_STATUS_NO_MEMORY;
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}
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state->state = SCHANNEL_STATE_START;
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state->seq_num = 0;
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gensec_security->private_data = state;
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return NT_STATUS_OK;
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}
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static NTSTATUS schannel_server_start(struct gensec_security *gensec_security)
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{
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NTSTATUS status;
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struct schannel_state *state;
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status = schannel_start(gensec_security);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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state = gensec_security->private_data;
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state->initiator = False;
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return NT_STATUS_OK;
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}
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static NTSTATUS schannel_client_start(struct gensec_security *gensec_security)
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{
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NTSTATUS status;
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struct schannel_state *state;
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status = schannel_start(gensec_security);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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state = gensec_security->private_data;
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state->initiator = True;
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return NT_STATUS_OK;
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}
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static BOOL schannel_have_feature(struct gensec_security *gensec_security,
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uint32_t feature)
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{
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if (feature & (GENSEC_FEATURE_SIGN |
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GENSEC_FEATURE_SEAL)) {
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return True;
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}
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if (feature & GENSEC_FEATURE_DCE_STYLE) {
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return True;
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}
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if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
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return True;
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}
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return False;
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}
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static const struct gensec_security_ops gensec_schannel_security_ops = {
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.name = "schannel",
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.auth_type = DCERPC_AUTH_TYPE_SCHANNEL,
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.client_start = schannel_client_start,
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.server_start = schannel_server_start,
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.update = schannel_update,
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.seal_packet = schannel_seal_packet,
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.sign_packet = schannel_sign_packet,
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.check_packet = schannel_check_packet,
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.unseal_packet = schannel_unseal_packet,
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.session_key = schannel_session_key,
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.session_info = schannel_session_info,
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.sig_size = schannel_sig_size,
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.have_feature = schannel_have_feature,
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.enabled = True,
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.priority = GENSEC_SCHANNEL
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};
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NTSTATUS gensec_schannel_init(void)
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{
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NTSTATUS ret;
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ret = gensec_register(&gensec_schannel_security_ops);
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if (!NT_STATUS_IS_OK(ret)) {
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DEBUG(0,("Failed to register '%s' gensec backend!\n",
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gensec_schannel_security_ops.name));
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return ret;
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}
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return ret;
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}
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