/* Unix SMB/CIFS implementation. 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 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, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "smbd/globals.h" #include "../libcli/smb/smb_common.h" #include "../libcli/auth/spnego.h" #include "../libcli/auth/ntlmssp.h" #include "ntlmssp_wrap.h" #include "../librpc/gen_ndr/krb5pac.h" #include "libads/kerberos_proto.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, uint16_t *out_session_flags, DATA_BLOB *out_security_buffer, uint64_t *out_session_id); NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req) { const uint8_t *inhdr; const uint8_t *inbody; int i = smb2req->current_idx; uint8_t *outhdr; DATA_BLOB outbody; DATA_BLOB outdyn; size_t expected_body_size = 0x19; size_t body_size; uint64_t in_session_id; uint8_t in_security_mode; uint16_t in_security_offset; uint16_t in_security_length; DATA_BLOB in_security_buffer; uint16_t out_session_flags; uint64_t out_session_id; uint16_t out_security_offset; DATA_BLOB out_security_buffer; NTSTATUS status; inhdr = (const uint8_t *)smb2req->in.vector[i+0].iov_base; 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 *)smb2req->in.vector[i+1].iov_base; body_size = SVAL(inbody, 0x00); if (body_size != expected_body_size) { 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(smb2req, 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 *)smb2req->in.vector[i+2].iov_base; in_security_buffer.length = in_security_length; status = smbd_smb2_session_setup(smb2req, in_session_id, in_security_mode, in_security_buffer, &out_session_flags, &out_security_buffer, &out_session_id); 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(smb2req, status); } out_security_offset = SMB2_HDR_BODY + 0x08; outhdr = (uint8_t *)smb2req->out.vector[i].iov_base; outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x08); if (outbody.data == NULL) { return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY); } SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id); SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */ SSVAL(outbody.data, 0x02, out_session_flags); /* session flags */ SSVAL(outbody.data, 0x04, out_security_offset); /* security buffer offset */ SSVAL(outbody.data, 0x06, out_security_buffer.length); /* security buffer length */ outdyn = out_security_buffer; return smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn, __location__); } static int smbd_smb2_session_destructor(struct smbd_smb2_session *session) { if (session->sconn == NULL) { return 0; } /* first free all tcons */ while (session->tcons.list) { talloc_free(session->tcons.list); } 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->sconn = NULL; return 0; } static NTSTATUS setup_ntlmssp_server_info(struct smbd_smb2_session *session, NTSTATUS status) { if (NT_STATUS_IS_OK(status)) { status = auth_ntlmssp_steal_server_info(session, session->auth_ntlmssp_state, &session->server_info); } else { /* Note that this server_info won't have a session * key. But for map to guest, that's exactly the right * thing - we can't reasonably guess the key the * client wants, as the password was wrong */ status = do_map_to_guest(status, &session->server_info, auth_ntlmssp_get_username(session->auth_ntlmssp_state), auth_ntlmssp_get_domain(session->auth_ntlmssp_state)); } return status; } #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; fstring tmp; bool username_was_mapped = false; bool map_domainuser_to_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(), smb2req->sconn->client_id.name, 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->msg_ctx, smb2req->sconn->sock, true); status = make_server_info_krb5(session, user, domain, real_username, pw, logon_info, map_domainuser_to_guest, &session->server_info); if (!NT_STATUS_IS_OK(status)) { DEBUG(1, ("smb2: make_server_info_krb5 failed\n")); goto fail; } session->server_info->nss_token |= username_was_mapped; /* we need to build the token for the user. make_server_info_guest() already does this */ if (!session->server_info->ptok ) { status = create_local_token(session->server_info); if (!NT_STATUS_IS_OK(status)) { DEBUG(10,("smb2: failed to create local token: %s\n", nt_errstr(status))); goto fail; } } if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) || lp_server_signing() == Required) { session->do_signing = true; } if (session->server_info->guest) { /* 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; } data_blob_free(&session->server_info->user_session_key); session->server_info->user_session_key = data_blob_talloc( session->server_info, session_key.data, session_key.length); if (session_key.length > 0) { if (session->server_info->user_session_key.data == NULL) { status = NT_STATUS_NO_MEMORY; goto fail; } } session->session_key = session->server_info->user_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->auth_ntlmssp_state = NULL; session->compat_vuser->homes_snum = -1; session->compat_vuser->server_info = session->server_info; session->compat_vuser->session_keystr = NULL; session->compat_vuser->vuid = session->vuid; DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser); /* This is a potentially untrusted username */ alpha_strcpy(tmp, user, ". _-$", sizeof(tmp)); session->server_info->sanitized_username = talloc_strdup(session->server_info, tmp); if (!session->server_info->guest) { session->compat_vuser->homes_snum = register_homes_share(session->server_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; } session->status = NT_STATUS_OK; /* * 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; } 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->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_start(&session->auth_ntlmssp_state); if (!NT_STATUS_IS_OK(status)) { goto out; } status = auth_ntlmssp_update(session->auth_ntlmssp_state, 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->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) { fstring tmp; if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) || lp_server_signing() == Required) { session->do_signing = true; } if (session->server_info->guest) { /* 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; } session->session_key = session->server_info->user_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_keystr = NULL; session->compat_vuser->vuid = session->vuid; DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser); /* This is a potentially untrusted username */ alpha_strcpy(tmp, auth_ntlmssp_get_username(session->auth_ntlmssp_state), ". _-$", sizeof(tmp)); session->server_info->sanitized_username = talloc_strdup( session->server_info, tmp); if (!session->compat_vuser->server_info->guest) { session->compat_vuser->homes_snum = register_homes_share(session->server_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 */ smb2req->session = session; if (session->do_signing) { smb2req->do_signing = true; } global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32); *out_session_id = session->vuid; 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->auth_ntlmssp_state == NULL) { 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, auth, &auth_out); /* We need to call setup_ntlmssp_server_info() if status==NT_STATUS_OK, or if status is anything except NT_STATUS_MORE_PROCESSING_REQUIRED, as this can trigger map to guest. */ if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { status = setup_ntlmssp_server_info(session, status); } 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; DATA_BLOB secblob_out = data_blob_null; 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; } } /* RAW NTLMSSP */ status = auth_ntlmssp_update(session->auth_ntlmssp_state, in_security_buffer, &secblob_out); if (NT_STATUS_IS_OK(status) || NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { *out_security_buffer = data_blob_talloc(smb2req, secblob_out.data, secblob_out.length); if (secblob_out.data && out_security_buffer->data == NULL) { TALLOC_FREE(session->auth_ntlmssp_state); TALLOC_FREE(session); return NT_STATUS_NO_MEMORY; } } if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { *out_session_id = session->vuid; return status; } status = setup_ntlmssp_server_info(session, status); 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) { struct smbd_smb2_session *session; *out_session_flags = 0; *out_session_id = 0; if (in_session_id == 0) { int id; /* 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); } if (NT_STATUS_IS_OK(session->status)) { return NT_STATUS_REQUEST_NOT_ACCEPTED; } 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); } else if (strncmp((char *)(in_security_buffer.data), "NTLMSSP", 7) == 0) { return smbd_smb2_raw_ntlmssp_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->auth_ntlmssp_state); TALLOC_FREE(session); return NT_STATUS_LOGON_FAILURE; } NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req) { const uint8_t *inhdr; const uint8_t *outhdr; int i = req->current_idx; uint64_t in_session_id; void *p; struct smbd_smb2_session *session; bool chained_fixup = false; inhdr = (const uint8_t *)req->in.vector[i+0].iov_base; in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID); if (in_session_id == (0xFFFFFFFFFFFFFFFFLL)) { if (req->async) { /* * async request - fill in session_id from * already setup request out.vector[].iov_base. */ outhdr = (const uint8_t *)req->out.vector[i].iov_base; in_session_id = BVAL(outhdr, SMB2_HDR_SESSION_ID); } else if (i > 2) { /* * Chained request - fill in session_id from * the previous request out.vector[].iov_base. */ outhdr = (const uint8_t *)req->out.vector[i-3].iov_base; in_session_id = BVAL(outhdr, SMB2_HDR_SESSION_ID); chained_fixup = true; } } /* lookup an existing session */ p = idr_find(req->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); if (!NT_STATUS_IS_OK(session->status)) { return NT_STATUS_ACCESS_DENIED; } set_current_user_info(session->server_info->sanitized_username, session->server_info->unix_name, session->server_info->info3->base.domain.string); req->session = session; if (chained_fixup) { /* Fix up our own outhdr. */ outhdr = (const uint8_t *)req->out.vector[i].iov_base; SBVAL(outhdr, SMB2_HDR_SESSION_ID, in_session_id); } return NT_STATUS_OK; } NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req) { const uint8_t *inbody; int i = req->current_idx; DATA_BLOB outbody; size_t expected_body_size = 0x04; size_t body_size; if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) { return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER); } inbody = (const uint8_t *)req->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); } /* * TODO: cancel all outstanding requests on the session * and delete all tree connections. */ smbd_smb2_session_destructor(req->session); /* * we may need to sign the response, so we need to keep * the session until the response is sent to the wire. */ talloc_steal(req, req->session); outbody = data_blob_talloc(req->out.vector, NULL, 0x04); if (outbody.data == NULL) { return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY); } SSVAL(outbody.data, 0x00, 0x04); /* struct size */ SSVAL(outbody.data, 0x02, 0); /* reserved */ return smbd_smb2_request_done(req, outbody, NULL); }