Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
+ Copyright (C) Jeremy Allison 2010
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
*/
#include "includes.h"
+#include "smbd/smbd.h"
#include "smbd/globals.h"
-#include "../source4/libcli/smb2/smb2_constants.h"
-
-static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
+#include "../libcli/smb/smb_common.h"
+#include "../libcli/auth/spnego.h"
+#include "../libcli/auth/ntlmssp.h"
+#include "../auth/gensec/gensec.h"
+#include "ntlmssp_wrap.h"
+#include "../librpc/gen_ndr/krb5pac.h"
+#include "libads/kerberos_proto.h"
+#include "../lib/util/asn1.h"
+#include "auth.h"
+#include "../lib/tsocket/tsocket.h"
+#include "../libcli/security/security.h"
+
+static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req,
uint64_t in_session_id,
uint8_t in_security_mode,
DATA_BLOB in_security_buffer,
DATA_BLOB *out_security_buffer,
uint64_t *out_session_id);
-NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req)
+NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req)
{
const uint8_t *inhdr;
const uint8_t *inbody;
- int i = req->current_idx;
+ int i = smb2req->current_idx;
uint8_t *outhdr;
DATA_BLOB outbody;
DATA_BLOB outdyn;
DATA_BLOB out_security_buffer;
NTSTATUS status;
- inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+ inhdr = (const uint8_t *)smb2req->in.vector[i+0].iov_base;
- if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ if (smb2req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+ return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
- inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+ inbody = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
body_size = SVAL(inbody, 0x00);
if (body_size != expected_body_size) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
in_security_offset = SVAL(inbody, 0x0C);
in_security_length = SVAL(inbody, 0x0E);
if (in_security_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
- if (in_security_length > req->in.vector[i+2].iov_len) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ if (in_security_length > smb2req->in.vector[i+2].iov_len) {
+ return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
}
in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
in_security_mode = CVAL(inbody, 0x03);
- in_security_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
+ in_security_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base;
in_security_buffer.length = in_security_length;
- status = smbd_smb2_session_setup(req,
+ status = smbd_smb2_session_setup(smb2req,
in_session_id,
in_security_mode,
in_security_buffer,
if (!NT_STATUS_IS_OK(status) &&
!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
status = nt_status_squash(status);
- return smbd_smb2_request_error(req, status);
+ return smbd_smb2_request_error(smb2req, status);
}
out_security_offset = SMB2_HDR_BODY + 0x08;
- outhdr = (uint8_t *)req->out.vector[i].iov_base;
+ outhdr = (uint8_t *)smb2req->out.vector[i].iov_base;
- outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
+ outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x08);
if (outbody.data == NULL) {
- return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
}
SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
outdyn = out_security_buffer;
- return smbd_smb2_request_done_ex(req, status, outbody, &outdyn);
+ return smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
+ __location__);
}
static int smbd_smb2_session_destructor(struct smbd_smb2_session *session)
{
- if (session->conn == NULL) {
+ if (session->sconn == NULL) {
return 0;
}
talloc_free(session->tcons.list);
}
- idr_remove(session->conn->smb2.sessions.idtree, session->vuid);
- DLIST_REMOVE(session->conn->smb2.sessions.list, session);
+ idr_remove(session->sconn->smb2.sessions.idtree, session->vuid);
+ DLIST_REMOVE(session->sconn->smb2.sessions.list, session);
+ invalidate_vuid(session->sconn, session->vuid);
session->vuid = 0;
session->status = NT_STATUS_USER_SESSION_DELETED;
- session->conn = NULL;
+ session->sconn = NULL;
return 0;
}
-static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
- uint64_t in_session_id,
+#ifdef HAVE_KRB5
+static NTSTATUS smbd_smb2_session_setup_krb5(struct smbd_smb2_session *session,
+ struct smbd_smb2_request *smb2req,
uint8_t in_security_mode,
- DATA_BLOB in_security_buffer,
+ const DATA_BLOB *secblob,
+ const char *mechOID,
uint16_t *out_session_flags,
DATA_BLOB *out_security_buffer,
uint64_t *out_session_id)
{
- struct smbd_smb2_session *session;
+ DATA_BLOB ap_rep = data_blob_null;
+ DATA_BLOB ap_rep_wrapped = data_blob_null;
+ DATA_BLOB ticket = data_blob_null;
+ DATA_BLOB session_key = data_blob_null;
+ DATA_BLOB secblob_out = data_blob_null;
+ uint8 tok_id[2];
+ struct PAC_LOGON_INFO *logon_info = NULL;
+ char *principal = NULL;
+ char *user = NULL;
+ char *domain = NULL;
+ struct passwd *pw = NULL;
NTSTATUS status;
+ char *real_username;
+ bool username_was_mapped = false;
+ bool map_domainuser_to_guest = false;
- *out_session_flags = 0;
- *out_session_id = 0;
+ if (!spnego_parse_krb5_wrap(talloc_tos(), *secblob, &ticket, tok_id)) {
+ status = NT_STATUS_LOGON_FAILURE;
+ goto fail;
+ }
- if (in_session_id == 0) {
- int id;
+ status = ads_verify_ticket(smb2req, lp_realm(), 0, &ticket,
+ &principal, &logon_info, &ap_rep,
+ &session_key, true);
- /* create a new session */
- session = talloc_zero(req->conn, struct smbd_smb2_session);
- if (session == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
- id = idr_get_new_random(req->conn->smb2.sessions.idtree,
- session,
- req->conn->smb2.sessions.limit);
- if (id == -1) {
- return NT_STATUS_INSUFFICIENT_RESOURCES;
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1,("smb2: Failed to verify incoming ticket with error %s!\n",
+ nt_errstr(status)));
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_TIME_DIFFERENCE_AT_DC)) {
+ status = NT_STATUS_LOGON_FAILURE;
}
- session->vuid = id;
+ goto fail;
+ }
- session->tcons.idtree = idr_init(session);
- if (session->tcons.idtree == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- session->tcons.limit = 0x0000FFFE;
- session->tcons.list = NULL;
+ status = get_user_from_kerberos_info(talloc_tos(),
+ session->sconn->remote_hostname,
+ principal, logon_info,
+ &username_was_mapped,
+ &map_domainuser_to_guest,
+ &user, &domain,
+ &real_username, &pw);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
- DLIST_ADD_END(req->conn->smb2.sessions.list, session,
- struct smbd_smb2_session *);
- session->conn = req->conn;
- talloc_set_destructor(session, smbd_smb2_session_destructor);
- } else {
- void *p;
+ /* save the PAC data if we have it */
+ if (logon_info) {
+ netsamlogon_cache_store(user, &logon_info->info3);
+ }
- /* lookup an existing session */
- p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
- if (p == NULL) {
- return NT_STATUS_USER_SESSION_DELETED;
- }
- session = talloc_get_type_abort(p, struct smbd_smb2_session);
+ /* setup the string used by %U */
+ sub_set_smb_name(real_username);
+
+ /* reload services so that the new %U is taken into account */
+ reload_services(smb2req->sconn->msg_ctx, smb2req->sconn->sock, true);
+
+ status = make_session_info_krb5(session,
+ user, domain, real_username, pw,
+ logon_info, map_domainuser_to_guest,
+ username_was_mapped,
+ &session_key,
+ &session->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("smb2: make_server_info_krb5 failed\n"));
+ goto fail;
}
- if (NT_STATUS_IS_OK(session->status)) {
- return NT_STATUS_REQUEST_NOT_ACCEPTED;
+ if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
+ lp_server_signing() == Required) {
+ session->do_signing = true;
}
- if (session->auth_ntlmssp_state == NULL) {
- status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
- if (!NT_STATUS_IS_OK(status)) {
- TALLOC_FREE(session);
- return status;
- }
+ if (security_session_user_level(session->session_info, NULL) < SECURITY_USER) {
+ /* we map anonymous to guest internally */
+ *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
+ *out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
+ /* force no signing */
+ session->do_signing = false;
}
- if (in_security_buffer.data[0] == ASN1_APPLICATION(0)) {
- DATA_BLOB secblob_in;
- DATA_BLOB chal_out;
- char *kerb_mech = NULL;
+ session->session_key = session->session_info->session_key;
- status = parse_spnego_mechanisms(in_security_buffer,
- &secblob_in, &kerb_mech);
- if (!NT_STATUS_IS_OK(status)) {
- TALLOC_FREE(session);
- return nt_status_squash(status);
- }
+ session->compat_vuser = talloc_zero(session, user_struct);
+ if (session->compat_vuser == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+ session->compat_vuser->auth_ntlmssp_state = NULL;
+ session->compat_vuser->homes_snum = -1;
+ session->compat_vuser->session_info = session->session_info;
+ session->compat_vuser->session_keystr = NULL;
+ session->compat_vuser->vuid = session->vuid;
+ DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser);
- /* For now, just SPNEGO NTLMSSP - krb5 goes here later.. */
- status = auth_ntlmssp_update(session->auth_ntlmssp_state,
- secblob_in,
- &chal_out);
+ if (security_session_user_level(session->session_info, NULL) >= SECURITY_USER) {
+ session->compat_vuser->homes_snum =
+ register_homes_share(session->session_info->unix_info->unix_name);
+ }
- if (!NT_STATUS_IS_OK(status) &&
- !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
- TALLOC_FREE(session);
- return nt_status_squash(status);
- }
+ if (!session_claim(session->sconn, session->compat_vuser)) {
+ DEBUG(1, ("smb2: Failed to claim session "
+ "for vuid=%d\n",
+ session->compat_vuser->vuid));
+ goto fail;
+ }
- *out_security_buffer = spnego_gen_auth_response(&chal_out,
- status, OID_NTLMSSP);
+ session->status = NT_STATUS_OK;
- *out_session_id = session->vuid;
- return status;
- } else if (in_security_buffer.data[0] == ASN1_CONTEXT(1)) {
- DATA_BLOB auth = data_blob_null;
- DATA_BLOB auth_out = data_blob_null;
+ /*
+ * we attach the session to the request
+ * so that the response can be signed
+ */
+ smb2req->session = session;
+ if (session->do_signing) {
+ smb2req->do_signing = true;
+ }
- /* its an auth packet */
- if (!spnego_parse_auth(in_security_buffer, &auth)) {
- TALLOC_FREE(session);
- return NT_STATUS_LOGON_FAILURE;
- }
- /* For now, just SPNEGO NTLMSSP - krb5 goes here later.. */
- status = auth_ntlmssp_update(session->auth_ntlmssp_state,
- auth,
- &auth_out);
- if (!NT_STATUS_IS_OK(status)) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
- TALLOC_FREE(session);
- return nt_status_squash(status);
- }
+ global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
+ status = NT_STATUS_OK;
+
+ /* wrap that up in a nice GSS-API wrapping */
+ ap_rep_wrapped = spnego_gen_krb5_wrap(talloc_tos(), ap_rep,
+ TOK_ID_KRB_AP_REP);
+
+ secblob_out = spnego_gen_auth_response(
+ talloc_tos(),
+ &ap_rep_wrapped,
+ status,
+ mechOID);
+
+ *out_security_buffer = data_blob_talloc(smb2req,
+ secblob_out.data,
+ secblob_out.length);
+ if (secblob_out.data && out_security_buffer->data == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
- *out_security_buffer = spnego_gen_auth_response(&auth_out,
- status, NULL);
+ data_blob_free(&ap_rep);
+ data_blob_free(&ap_rep_wrapped);
+ data_blob_free(&ticket);
+ data_blob_free(&session_key);
+ data_blob_free(&secblob_out);
- *out_session_id = session->vuid;
- } else if (strncmp((char *)(in_security_buffer.data), "NTLMSSP", 7) == 0) {
+ *out_session_id = session->vuid;
- /* RAW NTLMSSP */
- status = auth_ntlmssp_update(session->auth_ntlmssp_state,
- in_security_buffer,
- out_security_buffer);
+ return NT_STATUS_OK;
- if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- *out_session_id = session->vuid;
- return status;
+ fail:
+
+ data_blob_free(&ap_rep);
+ data_blob_free(&ap_rep_wrapped);
+ data_blob_free(&ticket);
+ data_blob_free(&session_key);
+ data_blob_free(&secblob_out);
+
+ ap_rep_wrapped = data_blob_null;
+ secblob_out = spnego_gen_auth_response(
+ talloc_tos(),
+ &ap_rep_wrapped,
+ status,
+ mechOID);
+
+ *out_security_buffer = data_blob_talloc(smb2req,
+ secblob_out.data,
+ secblob_out.length);
+ data_blob_free(&secblob_out);
+ return status;
+}
+#endif
+
+static NTSTATUS smbd_smb2_spnego_negotiate(struct smbd_smb2_session *session,
+ struct smbd_smb2_request *smb2req,
+ uint8_t in_security_mode,
+ DATA_BLOB in_security_buffer,
+ uint16_t *out_session_flags,
+ DATA_BLOB *out_security_buffer,
+ uint64_t *out_session_id)
+{
+ DATA_BLOB secblob_in = data_blob_null;
+ DATA_BLOB chal_out = data_blob_null;
+ char *kerb_mech = NULL;
+ NTSTATUS status;
+
+ /* Ensure we have no old NTLM state around. */
+ TALLOC_FREE(session->auth_ntlmssp_state);
+
+ status = parse_spnego_mechanisms(talloc_tos(), in_security_buffer,
+ &secblob_in, &kerb_mech);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto out;
+ }
+
+#ifdef HAVE_KRB5
+ if (kerb_mech && ((lp_security()==SEC_ADS) ||
+ USE_KERBEROS_KEYTAB) ) {
+ status = smbd_smb2_session_setup_krb5(session,
+ smb2req,
+ in_security_mode,
+ &secblob_in,
+ kerb_mech,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
+
+ goto out;
+ }
+#endif
+
+ if (kerb_mech) {
+ /* The mechtoken is a krb5 ticket, but
+ * we need to fall back to NTLM. */
+
+ DEBUG(3,("smb2: Got krb5 ticket in SPNEGO "
+ "but set to downgrade to NTLMSSP\n"));
+
+ status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ } else {
+ /* Fall back to NTLMSSP. */
+ status = auth_ntlmssp_prepare(session->sconn->remote_address,
+ &session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto out;
}
+
+ auth_ntlmssp_want_feature(session->auth_ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
+
+ status = auth_ntlmssp_start(session->auth_ntlmssp_state);
if (!NT_STATUS_IS_OK(status)) {
- auth_ntlmssp_end(&session->auth_ntlmssp_state);
- TALLOC_FREE(session);
- return nt_status_squash(status);
+ goto out;
}
- *out_session_id = session->vuid;
+
+ status = auth_ntlmssp_update(session->auth_ntlmssp_state,
+ talloc_tos(),
+ secblob_in,
+ &chal_out);
}
- /* TODO: setup session key for signing */
+ if (!NT_STATUS_IS_OK(status) &&
+ !NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ goto out;
+ }
+
+ *out_security_buffer = spnego_gen_auth_response(smb2req,
+ &chal_out,
+ status,
+ OID_NTLMSSP);
+ if (out_security_buffer->data == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+ *out_session_id = session->vuid;
+
+ out:
+ data_blob_free(&secblob_in);
+ data_blob_free(&chal_out);
+ TALLOC_FREE(kerb_mech);
+ if (!NT_STATUS_IS_OK(status) &&
+ !NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ TALLOC_FREE(session);
+ }
+ return status;
+}
+
+static NTSTATUS smbd_smb2_common_ntlmssp_auth_return(struct smbd_smb2_session *session,
+ struct smbd_smb2_request *smb2req,
+ uint8_t in_security_mode,
+ DATA_BLOB in_security_buffer,
+ uint16_t *out_session_flags,
+ uint64_t *out_session_id)
+{
if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
lp_server_signing() == Required) {
session->do_signing = true;
}
- if (session->auth_ntlmssp_state->server_info->guest) {
+ if (security_session_user_level(session->session_info, NULL) < SECURITY_USER) {
/* we map anonymous to guest internally */
*out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
*out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
session->do_signing = false;
}
- session->server_info = session->auth_ntlmssp_state->server_info;
- data_blob_free(&session->server_info->user_session_key);
- session->server_info->user_session_key =
- data_blob_talloc(
- session->server_info,
- session->auth_ntlmssp_state->ntlmssp_state->session_key.data,
- session->auth_ntlmssp_state->ntlmssp_state->session_key.length);
- if (session->auth_ntlmssp_state->ntlmssp_state->session_key.length > 0) {
- if (session->server_info->user_session_key.data == NULL) {
- TALLOC_FREE(session);
- return NT_STATUS_NO_MEMORY;
- }
- }
- session->session_key = session->server_info->user_session_key;
+ session->session_key = session->session_info->session_key;
session->compat_vuser = talloc_zero(session, user_struct);
if (session->compat_vuser == NULL) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
TALLOC_FREE(session);
return NT_STATUS_NO_MEMORY;
}
session->compat_vuser->auth_ntlmssp_state = session->auth_ntlmssp_state;
session->compat_vuser->homes_snum = -1;
- session->compat_vuser->server_info = session->server_info;
+ session->compat_vuser->session_info = session->session_info;
session->compat_vuser->session_keystr = NULL;
session->compat_vuser->vuid = session->vuid;
- DLIST_ADD(session->conn->smb1.sessions.validated_users, session->compat_vuser);
+ DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser);
+
+ if (security_session_user_level(session->session_info, NULL) >= SECURITY_USER) {
+ session->compat_vuser->homes_snum =
+ register_homes_share(session->session_info->unix_info->unix_name);
+ }
+
+ if (!session_claim(session->sconn, session->compat_vuser)) {
+ DEBUG(1, ("smb2: Failed to claim session "
+ "for vuid=%d\n",
+ session->compat_vuser->vuid));
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ TALLOC_FREE(session);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
session->status = NT_STATUS_OK;
* we attach the session to the request
* so that the response can be signed
*/
- req->session = session;
+ smb2req->session = session;
if (session->do_signing) {
- req->do_signing = true;
+ smb2req->do_signing = true;
}
+ global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
+
*out_session_id = session->vuid;
- return status;
+
+ return NT_STATUS_OK;
}
-NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req)
+static NTSTATUS smbd_smb2_spnego_auth(struct smbd_smb2_session *session,
+ struct smbd_smb2_request *smb2req,
+ uint8_t in_security_mode,
+ DATA_BLOB in_security_buffer,
+ uint16_t *out_session_flags,
+ DATA_BLOB *out_security_buffer,
+ uint64_t *out_session_id)
+{
+ DATA_BLOB auth = data_blob_null;
+ DATA_BLOB auth_out = data_blob_null;
+ NTSTATUS status;
+
+ if (!spnego_parse_auth(talloc_tos(), in_security_buffer, &auth)) {
+ TALLOC_FREE(session);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ if (auth.data[0] == ASN1_APPLICATION(0)) {
+ /* Might be a second negTokenTarg packet */
+ DATA_BLOB secblob_in = data_blob_null;
+ char *kerb_mech = NULL;
+
+ status = parse_spnego_mechanisms(talloc_tos(),
+ in_security_buffer,
+ &secblob_in, &kerb_mech);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session);
+ return status;
+ }
+
+#ifdef HAVE_KRB5
+ if (kerb_mech && ((lp_security()==SEC_ADS) ||
+ USE_KERBEROS_KEYTAB) ) {
+ status = smbd_smb2_session_setup_krb5(session,
+ smb2req,
+ in_security_mode,
+ &secblob_in,
+ kerb_mech,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
+
+ data_blob_free(&secblob_in);
+ TALLOC_FREE(kerb_mech);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session);
+ }
+ return status;
+ }
+#endif
+
+ /* Can't blunder into NTLMSSP auth if we have
+ * a krb5 ticket. */
+
+ if (kerb_mech) {
+ DEBUG(3,("smb2: network "
+ "misconfiguration, client sent us a "
+ "krb5 ticket and kerberos security "
+ "not enabled\n"));
+ TALLOC_FREE(session);
+ data_blob_free(&secblob_in);
+ TALLOC_FREE(kerb_mech);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ data_blob_free(&secblob_in);
+ }
+
+ if (session->auth_ntlmssp_state == NULL) {
+ status = auth_ntlmssp_prepare(session->sconn->remote_address,
+ &session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(&auth);
+ TALLOC_FREE(session);
+ return status;
+ }
+
+ auth_ntlmssp_want_feature(session->auth_ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
+
+ status = auth_ntlmssp_start(session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(&auth);
+ TALLOC_FREE(session);
+ return status;
+ }
+ }
+
+ status = auth_ntlmssp_update(session->auth_ntlmssp_state,
+ talloc_tos(), auth,
+ &auth_out);
+ /* If status is NT_STATUS_OK then we need to get the token.
+ * Map to guest is now internal to auth_ntlmssp */
+ if (NT_STATUS_IS_OK(status)) {
+ status = auth_ntlmssp_session_info(session,
+ session->auth_ntlmssp_state,
+ &session->session_info);
+ }
+
+ if (!NT_STATUS_IS_OK(status) &&
+ !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ data_blob_free(&auth);
+ TALLOC_FREE(session);
+ return status;
+ }
+
+ data_blob_free(&auth);
+
+ *out_security_buffer = spnego_gen_auth_response(smb2req,
+ &auth_out, status, NULL);
+
+ if (out_security_buffer->data == NULL) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ TALLOC_FREE(session);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ *out_session_id = session->vuid;
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+ }
+
+ /* We're done - claim the session. */
+ return smbd_smb2_common_ntlmssp_auth_return(session,
+ smb2req,
+ in_security_mode,
+ in_security_buffer,
+ out_session_flags,
+ out_session_id);
+}
+
+static NTSTATUS smbd_smb2_raw_ntlmssp_auth(struct smbd_smb2_session *session,
+ struct smbd_smb2_request *smb2req,
+ uint8_t in_security_mode,
+ DATA_BLOB in_security_buffer,
+ uint16_t *out_session_flags,
+ DATA_BLOB *out_security_buffer,
+ uint64_t *out_session_id)
+{
+ NTSTATUS status;
+
+ if (session->auth_ntlmssp_state == NULL) {
+ status = auth_ntlmssp_prepare(session->sconn->remote_address,
+ &session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session);
+ return status;
+ }
+
+ auth_ntlmssp_want_feature(session->auth_ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
+
+ if (session->sconn->use_gensec_hook) {
+ status = auth_generic_start(session->auth_ntlmssp_state, GENSEC_OID_SPNEGO);
+ } else {
+ status = auth_ntlmssp_start(session->auth_ntlmssp_state);
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session);
+ return status;
+ }
+ }
+
+ /* RAW NTLMSSP */
+ status = auth_ntlmssp_update(session->auth_ntlmssp_state,
+ smb2req,
+ in_security_buffer,
+ out_security_buffer);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ *out_session_id = session->vuid;
+ return status;
+ }
+
+ status = auth_ntlmssp_session_info(session,
+ session->auth_ntlmssp_state,
+ &session->session_info);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ TALLOC_FREE(session);
+ return status;
+ }
+ *out_session_id = session->vuid;
+
+ return smbd_smb2_common_ntlmssp_auth_return(session,
+ smb2req,
+ in_security_mode,
+ in_security_buffer,
+ out_session_flags,
+ out_session_id);
+}
+
+static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req,
+ uint64_t in_session_id,
+ uint8_t in_security_mode,
+ DATA_BLOB in_security_buffer,
+ uint16_t *out_session_flags,
+ DATA_BLOB *out_security_buffer,
+ uint64_t *out_session_id)
{
- const uint8_t *inhdr;
- int i = req->current_idx;
- uint64_t in_session_id;
- void *p;
struct smbd_smb2_session *session;
- inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+ *out_session_flags = 0;
+ *out_session_id = 0;
- in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
+ if (in_session_id == 0) {
+ int id;
- /* lookup an existing session */
- p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
- if (p == NULL) {
- return NT_STATUS_USER_SESSION_DELETED;
+ /* create a new session */
+ session = talloc_zero(smb2req->sconn, struct smbd_smb2_session);
+ if (session == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ id = idr_get_new_random(smb2req->sconn->smb2.sessions.idtree,
+ session,
+ smb2req->sconn->smb2.sessions.limit);
+ if (id == -1) {
+ return NT_STATUS_INSUFFICIENT_RESOURCES;
+ }
+ session->vuid = id;
+
+ session->tcons.idtree = idr_init(session);
+ if (session->tcons.idtree == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ session->tcons.limit = 0x0000FFFE;
+ session->tcons.list = NULL;
+
+ DLIST_ADD_END(smb2req->sconn->smb2.sessions.list, session,
+ struct smbd_smb2_session *);
+ session->sconn = smb2req->sconn;
+ talloc_set_destructor(session, smbd_smb2_session_destructor);
+ } else {
+ void *p;
+
+ /* lookup an existing session */
+ p = idr_find(smb2req->sconn->smb2.sessions.idtree, in_session_id);
+ if (p == NULL) {
+ return NT_STATUS_USER_SESSION_DELETED;
+ }
+ session = talloc_get_type_abort(p, struct smbd_smb2_session);
}
- session = talloc_get_type_abort(p, struct smbd_smb2_session);
- if (!NT_STATUS_IS_OK(session->status)) {
- return NT_STATUS_ACCESS_DENIED;
+ if (NT_STATUS_IS_OK(session->status)) {
+ return NT_STATUS_REQUEST_NOT_ACCEPTED;
}
- set_current_user_info(session->server_info->sanitized_username,
- session->server_info->unix_name,
- pdb_get_domain(session->server_info->sam_account));
+ /* Handle either raw NTLMSSP or hand off the whole blob to
+ * GENSEC. The processing at this layer is essentially
+ * identical regardless. In particular, both rely only on the
+ * status code (not the contents of the packet) and do not
+ * wrap the result */
+ if (session->sconn->use_gensec_hook
+ || ntlmssp_blob_matches_magic(&in_security_buffer)) {
+ return smbd_smb2_raw_ntlmssp_auth(session,
+ smb2req,
+ in_security_mode,
+ in_security_buffer,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
+ } else if (in_security_buffer.data[0] == ASN1_APPLICATION(0)) {
+ return smbd_smb2_spnego_negotiate(session,
+ smb2req,
+ in_security_mode,
+ in_security_buffer,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
+ } else if (in_security_buffer.data[0] == ASN1_CONTEXT(1)) {
+ return smbd_smb2_spnego_auth(session,
+ smb2req,
+ in_security_mode,
+ in_security_buffer,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
+ }
- req->session = session;
- return NT_STATUS_OK;
+ /* Unknown packet type. */
+ DEBUG(1,("Unknown packet type %u in smb2 sessionsetup\n",
+ (unsigned int)in_security_buffer.data[0] ));
+ TALLOC_FREE(session->auth_ntlmssp_state);
+ TALLOC_FREE(session);
+ return NT_STATUS_LOGON_FAILURE;
}
NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
git.samba.org / amitay / samba.git / blobdiff