#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
-#include "../libcli/auth/spnego.h"
#include "../auth/gensec/gensec.h"
-#include "../auth/ntlmssp/ntlmssp.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"
return 0;
}
-#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,
- const DATA_BLOB *secblob,
- const char *mechOID,
- uint16_t *out_session_flags,
- DATA_BLOB *out_security_buffer,
- uint64_t *out_session_id)
-{
- 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;
- bool guest = false;
-
- if (!spnego_parse_krb5_wrap(talloc_tos(), *secblob, &ticket, tok_id)) {
- status = NT_STATUS_LOGON_FAILURE;
- goto fail;
- }
-
- status = ads_verify_ticket(smb2req, lp_realm(), 0, &ticket,
- &principal, &logon_info, &ap_rep,
- &session_key, true);
-
- 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;
- }
- goto fail;
- }
-
- 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;
- }
-
- /* save the PAC data if we have it */
- if (logon_info) {
- netsamlogon_cache_store(user, &logon_info->info3);
- }
-
- /* 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, conn_snum_used, 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 ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
- lp_server_signing() == SMB_SIGNING_REQUIRED) {
- session->do_signing = true;
- }
-
- 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;
- guest = true;
- }
-
- session->session_key = session->session_info->session_key;
-
- session->compat_vuser = talloc_zero(session, user_struct);
- if (session->compat_vuser == NULL) {
- status = NT_STATUS_NO_MEMORY;
- goto fail;
- }
- session->compat_vuser->gensec_security = 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);
-
- 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));
- goto fail;
- }
-
- set_current_user_info(session->session_info->unix_info->sanitized_username,
- session->session_info->unix_info->unix_name,
- session->session_info->info->domain_name);
-
- reload_services(smb2req->sconn, conn_snum_used, true);
-
- session->status = NT_STATUS_OK;
-
- /*
- * we attach the session to the request
- * so that the response can be signed
- */
- smb2req->session = session;
- if (!guest) {
- smb2req->do_signing = true;
- }
-
- 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;
- }
-
- 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;
-
- return NT_STATUS_OK;
-
- 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->gensec_security);
-
- 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_generic_prepare(session, session->sconn->remote_address,
- &session->gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- goto out;
- }
-
- gensec_want_feature(session->gensec_security, GENSEC_FEATURE_SESSION_KEY);
- gensec_want_feature(session->gensec_security, GENSEC_FEATURE_UNIX_TOKEN);
-
- status = gensec_start_mech_by_oid(session->gensec_security, GENSEC_OID_NTLMSSP);
- if (!NT_STATUS_IS_OK(status)) {
- goto out;
- }
-
- status = gensec_update(session->gensec_security,
- talloc_tos(), NULL,
- secblob_in,
- &chal_out);
- }
-
- 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);
- }
- 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,
return NT_STATUS_OK;
}
-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->gensec_security == NULL) {
- status = auth_generic_prepare(session, session->sconn->remote_address,
- &session->gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_free(&auth);
- TALLOC_FREE(session);
- return status;
- }
-
- gensec_want_feature(session->gensec_security, GENSEC_FEATURE_SESSION_KEY);
- gensec_want_feature(session->gensec_security, GENSEC_FEATURE_UNIX_TOKEN);
-
- status = gensec_start_mech_by_oid(session->gensec_security, GENSEC_OID_NTLMSSP);
- if (!NT_STATUS_IS_OK(status)) {
- data_blob_free(&auth);
- TALLOC_FREE(session);
- return status;
- }
- }
-
- status = gensec_update(session->gensec_security,
- talloc_tos(), NULL,
- 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 = gensec_session_info(session->gensec_security,
- session,
- &session->session_info);
- }
-
- if (!NT_STATUS_IS_OK(status) &&
- !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- 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);
- 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,
return NT_STATUS_REQUEST_NOT_ACCEPTED;
}
- /* 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);
- }
-
- /* Unknown packet type. */
- DEBUG(1,("Unknown packet type %u in smb2 sessionsetup\n",
- (unsigned int)in_security_buffer.data[0] ));
- TALLOC_FREE(session);
- return NT_STATUS_LOGON_FAILURE;
+ return smbd_smb2_raw_ntlmssp_auth(session,
+ smb2req,
+ in_security_mode,
+ in_security_buffer,
+ out_session_flags,
+ out_security_buffer,
+ out_session_id);
}
NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
git.samba.org / gd / samba-autobuild / .git / commitdiff