/** * FreeRDP: A Remote Desktop Protocol Implementation * RDP Client Info * * Copyright 2011 Marc-Andre Moreau * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "timezone.h" #include "info.h" #define INFO_TYPE_LOGON 0x00000000 #define INFO_TYPE_LOGON_LONG 0x00000001 #define INFO_TYPE_LOGON_PLAIN_NOTIFY 0x00000002 #define INFO_TYPE_LOGON_EXTENDED_INF 0x00000003 /* static const char* const INFO_TYPE_LOGON_STRINGS[] = { "Logon Info V1", "Logon Info V2", "Logon Plain Notify", "Logon Extended Info" }; */ /** * Read Server Auto Reconnect Cookie (ARC_SC_PRIVATE_PACKET).\n * @msdn{cc240540} * @param s stream * @param settings settings */ BOOL rdp_read_server_auto_reconnect_cookie(wStream* s, rdpSettings* settings) { ARC_SC_PRIVATE_PACKET* autoReconnectCookie; autoReconnectCookie = settings->ServerAutoReconnectCookie; if (Stream_GetRemainingLength(s) < 4+4+4+16) return FALSE; Stream_Read_UINT32(s, autoReconnectCookie->cbLen); /* cbLen (4 bytes) */ Stream_Read_UINT32(s, autoReconnectCookie->version); /* version (4 bytes) */ Stream_Read_UINT32(s, autoReconnectCookie->logonId); /* LogonId (4 bytes) */ Stream_Read(s, autoReconnectCookie->arcRandomBits, 16); /* arcRandomBits (16 bytes) */ if ((settings->PrintReconnectCookie) && (autoReconnectCookie->cbLen > 0)) { char *base64; base64 = crypto_base64_encode((BYTE *) autoReconnectCookie, sizeof(ARC_SC_PRIVATE_PACKET)); fprintf(stderr, "Reconnect-cookie: %s\n", base64); free(base64); } return TRUE; } /** * Read Client Auto Reconnect Cookie (ARC_CS_PRIVATE_PACKET).\n * @msdn{cc240541} * @param s stream * @param settings settings */ BOOL rdp_read_client_auto_reconnect_cookie(wStream* s, rdpSettings* settings) { ARC_CS_PRIVATE_PACKET* autoReconnectCookie; autoReconnectCookie = settings->ClientAutoReconnectCookie; if (Stream_GetRemainingLength(s) < 28) return FALSE; Stream_Read_UINT32(s, autoReconnectCookie->cbLen); /* cbLen (4 bytes) */ Stream_Read_UINT32(s, autoReconnectCookie->version); /* version (4 bytes) */ Stream_Read_UINT32(s, autoReconnectCookie->logonId); /* LogonId (4 bytes) */ Stream_Read(s, autoReconnectCookie->securityVerifier, 16); /* SecurityVerifier */ return TRUE; } /** * Write Client Auto Reconnect Cookie (ARC_CS_PRIVATE_PACKET).\n * @msdn{cc240541} * @param s stream * @param settings settings */ void rdp_write_client_auto_reconnect_cookie(wStream* s, rdpSettings* settings) { ARC_CS_PRIVATE_PACKET* autoReconnectCookie; autoReconnectCookie = settings->ClientAutoReconnectCookie; Stream_Write_UINT32(s, autoReconnectCookie->cbLen); /* cbLen (4 bytes) */ Stream_Write_UINT32(s, autoReconnectCookie->version); /* version (4 bytes) */ Stream_Write_UINT32(s, autoReconnectCookie->logonId); /* LogonId (4 bytes) */ Stream_Write(s, autoReconnectCookie->securityVerifier, 16); /* SecurityVerifier */ } /** * Read Extended Info Packet (TS_EXTENDED_INFO_PACKET).\n * @msdn{cc240476} * @param s stream * @param settings settings */ BOOL rdp_read_extended_info_packet(wStream* s, rdpSettings* settings) { UINT16 clientAddressFamily; UINT16 cbClientAddress; UINT16 cbClientDir; UINT16 cbAutoReconnectLen; if (Stream_GetRemainingLength(s) < 4) return FALSE; Stream_Read_UINT16(s, clientAddressFamily); /* clientAddressFamily */ Stream_Read_UINT16(s, cbClientAddress); /* cbClientAddress */ settings->IPv6Enabled = (clientAddressFamily == ADDRESS_FAMILY_INET6 ? TRUE : FALSE); if (Stream_GetRemainingLength(s) < cbClientAddress) return FALSE; if (settings->ClientAddress) { free(settings->ClientAddress); settings->ClientAddress = NULL; } ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbClientAddress / 2, &settings->ClientAddress, 0, NULL, NULL); Stream_Seek(s, cbClientAddress); if (Stream_GetRemainingLength(s) < 2) return FALSE; Stream_Read_UINT16(s, cbClientDir); /* cbClientDir */ if (Stream_GetRemainingLength(s) < cbClientDir) return FALSE; if (settings->ClientDir) { free(settings->ClientDir); settings->ClientDir = NULL; } ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbClientDir / 2, &settings->ClientDir, 0, NULL, NULL); Stream_Seek(s, cbClientDir); if (!rdp_read_client_time_zone(s, settings)) return FALSE; if (Stream_GetRemainingLength(s) < 10) return FALSE; Stream_Seek_UINT32(s); /* clientSessionId, should be set to 0 */ Stream_Read_UINT32(s, settings->PerformanceFlags); /* performanceFlags */ freerdp_performance_flags_split(settings); Stream_Read_UINT16(s, cbAutoReconnectLen); /* cbAutoReconnectLen */ if (cbAutoReconnectLen > 0) return rdp_read_client_auto_reconnect_cookie(s, settings); /* autoReconnectCookie */ /* reserved1 (2 bytes) */ /* reserved2 (2 bytes) */ return TRUE; } /** * Write Extended Info Packet (TS_EXTENDED_INFO_PACKET).\n * @msdn{cc240476} * @param s stream * @param settings settings */ void rdp_write_extended_info_packet(wStream* s, rdpSettings* settings) { int clientAddressFamily; WCHAR* clientAddress = NULL; int cbClientAddress; WCHAR* clientDir = NULL; int cbClientDir; int cbAutoReconnectLen; clientAddressFamily = settings->IPv6Enabled ? ADDRESS_FAMILY_INET6 : ADDRESS_FAMILY_INET; cbClientAddress = ConvertToUnicode(CP_UTF8, 0, settings->ClientAddress, -1, &clientAddress, 0) * 2; cbClientDir = ConvertToUnicode(CP_UTF8, 0, settings->ClientDir, -1, &clientDir, 0) * 2; cbAutoReconnectLen = (int) settings->ServerAutoReconnectCookie->cbLen; Stream_Write_UINT16(s, clientAddressFamily); /* clientAddressFamily */ Stream_Write_UINT16(s, cbClientAddress + 2); /* cbClientAddress */ if (cbClientAddress > 0) Stream_Write(s, clientAddress, cbClientAddress); /* clientAddress */ Stream_Write_UINT16(s, 0); Stream_Write_UINT16(s, cbClientDir + 2); /* cbClientDir */ if (cbClientDir > 0) Stream_Write(s, clientDir, cbClientDir); /* clientDir */ Stream_Write_UINT16(s, 0); rdp_write_client_time_zone(s, settings); /* clientTimeZone */ Stream_Write_UINT32(s, 0); /* clientSessionId, should be set to 0 */ freerdp_performance_flags_make(settings); Stream_Write_UINT32(s, settings->PerformanceFlags); /* performanceFlags */ Stream_Write_UINT16(s, cbAutoReconnectLen); /* cbAutoReconnectLen */ if (cbAutoReconnectLen > 0) { CryptoHmac hmac; ARC_SC_PRIVATE_PACKET* serverCookie; ARC_CS_PRIVATE_PACKET* clientCookie; printf("Sending auto reconnect\n"); serverCookie = settings->ServerAutoReconnectCookie; clientCookie = settings->ClientAutoReconnectCookie; clientCookie->cbLen = serverCookie->cbLen; clientCookie->version = serverCookie->version; clientCookie->logonId = serverCookie->logonId; hmac = crypto_hmac_new(); crypto_hmac_md5_init(hmac, serverCookie->arcRandomBits, 16); if (settings->SelectedProtocol == PROTOCOL_RDP) { crypto_hmac_update(hmac, (BYTE*) (settings->ClientRandom), 32); } else { /* Anthony Tong's version had 16 zeroes here; I'm not sure why. * I do know that 16 did not reconnect correctly vs Win2008RDVH, * and 32 did. */ const BYTE zeros[32] = { 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }; crypto_hmac_update(hmac, zeros, 32); } crypto_hmac_final(hmac, clientCookie->securityVerifier, 16); rdp_write_client_auto_reconnect_cookie(s, settings); /* autoReconnectCookie */ /* mark as used */ settings->ServerAutoReconnectCookie->cbLen = 0; } /* reserved1 (2 bytes) */ /* reserved2 (2 bytes) */ free(clientAddress); free(clientDir); } /** * Read Info Packet (TS_INFO_PACKET).\n * @msdn{cc240475} * @param s stream * @param settings settings */ BOOL rdp_read_info_packet(wStream* s, rdpSettings* settings) { UINT32 flags; UINT16 cbDomain; UINT16 cbUserName; UINT16 cbPassword; UINT16 cbAlternateShell; UINT16 cbWorkingDir; if (Stream_GetRemainingLength(s) < 18) // invalid packet return FALSE; Stream_Seek_UINT32(s); /* CodePage */ Stream_Read_UINT32(s, flags); /* flags */ settings->AudioCapture = ((flags & INFO_AUDIOCAPTURE) ? TRUE : FALSE); settings->AudioPlayback = ((flags & INFO_NOAUDIOPLAYBACK) ? FALSE : TRUE); settings->AutoLogonEnabled = ((flags & INFO_AUTOLOGON) ? TRUE : FALSE); settings->RemoteApplicationMode = ((flags & INFO_RAIL) ? TRUE : FALSE); settings->RemoteConsoleAudio = ((flags & INFO_REMOTECONSOLEAUDIO) ? TRUE : FALSE); settings->CompressionEnabled = ((flags & INFO_COMPRESSION) ? TRUE : FALSE); Stream_Read_UINT16(s, cbDomain); /* cbDomain */ Stream_Read_UINT16(s, cbUserName); /* cbUserName */ Stream_Read_UINT16(s, cbPassword); /* cbPassword */ Stream_Read_UINT16(s, cbAlternateShell); /* cbAlternateShell */ Stream_Read_UINT16(s, cbWorkingDir); /* cbWorkingDir */ if (Stream_GetRemainingLength(s) < cbDomain + 2) return FALSE; if (cbDomain > 0) { ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbDomain / 2, &settings->Domain, 0, NULL, NULL); Stream_Seek(s, cbDomain); } Stream_Seek(s, 2); if (Stream_GetRemainingLength(s) < cbUserName + 2) return FALSE; if (cbUserName > 0) { ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbUserName / 2, &settings->Username, 0, NULL, NULL); Stream_Seek(s, cbUserName); } Stream_Seek(s, 2); if (Stream_GetRemainingLength(s) < cbPassword + 2) return FALSE; if (cbPassword > 0) { ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbPassword / 2, &settings->Password, 0, NULL, NULL); Stream_Seek(s, cbPassword); } Stream_Seek(s, 2); if (Stream_GetRemainingLength(s) < cbAlternateShell + 2) return FALSE; if (cbAlternateShell > 0) { ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbAlternateShell / 2, &settings->AlternateShell, 0, NULL, NULL); Stream_Seek(s, cbAlternateShell); } Stream_Seek(s, 2); if (Stream_GetRemainingLength(s) < cbWorkingDir + 2) return FALSE; if (cbWorkingDir > 0) { ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(s), cbWorkingDir / 2, &settings->ShellWorkingDirectory, 0, NULL, NULL); Stream_Seek(s, cbWorkingDir); } Stream_Seek(s, 2); if (settings->RdpVersion >= 5) return rdp_read_extended_info_packet(s, settings); /* extraInfo */ return TRUE; } /** * Write Info Packet (TS_INFO_PACKET).\n * @msdn{cc240475} * @param s stream * @param settings settings */ void rdp_write_info_packet(wStream* s, rdpSettings* settings) { UINT32 flags; WCHAR* domain = NULL; int cbDomain = 0; WCHAR* userName = NULL; int cbUserName = 0; WCHAR* password = NULL; int cbPassword = 0; WCHAR* alternateShell = NULL; int cbAlternateShell = 0; WCHAR* workingDir = NULL; int cbWorkingDir = 0; BOOL usedPasswordCookie = FALSE; flags = INFO_MOUSE | INFO_UNICODE | INFO_LOGONERRORS | INFO_LOGONNOTIFY | INFO_MAXIMIZESHELL | INFO_ENABLEWINDOWSKEY | INFO_DISABLECTRLALTDEL; if (settings->AudioCapture) flags |= INFO_AUDIOCAPTURE; if (!settings->AudioPlayback) flags |= INFO_NOAUDIOPLAYBACK; if (settings->VideoDisable) flags |= INFO_VIDEO_DISABLE; if (settings->AutoLogonEnabled) flags |= INFO_AUTOLOGON; if (settings->RemoteApplicationMode) flags |= INFO_RAIL; if (settings->RemoteConsoleAudio) flags |= INFO_REMOTECONSOLEAUDIO; if (settings->CompressionEnabled) flags |= INFO_COMPRESSION | INFO_PACKET_COMPR_TYPE_RDP6; if (settings->Domain) { cbDomain = ConvertToUnicode(CP_UTF8, 0, settings->Domain, -1, &domain, 0) * 2; } else { domain = NULL; cbDomain = 0; } cbUserName = ConvertToUnicode(CP_UTF8, 0, settings->Username, -1, &userName, 0) * 2; if (settings->RedirectionPassword && settings->RedirectionPasswordLength > 0) { usedPasswordCookie = TRUE; password = (WCHAR*) settings->RedirectionPassword; cbPassword = settings->RedirectionPasswordLength - 2; /* Strip double zero termination */ } else { cbPassword = ConvertToUnicode(CP_UTF8, 0, settings->Password, -1, &password, 0) * 2; } cbAlternateShell = ConvertToUnicode(CP_UTF8, 0, settings->AlternateShell, -1, &alternateShell, 0) * 2; cbWorkingDir = ConvertToUnicode(CP_UTF8, 0, settings->ShellWorkingDirectory, -1, &workingDir, 0) * 2; Stream_Write_UINT32(s, 0); /* CodePage */ Stream_Write_UINT32(s, flags); /* flags */ Stream_Write_UINT16(s, cbDomain); /* cbDomain */ Stream_Write_UINT16(s, cbUserName); /* cbUserName */ Stream_Write_UINT16(s, cbPassword); /* cbPassword */ Stream_Write_UINT16(s, cbAlternateShell); /* cbAlternateShell */ Stream_Write_UINT16(s, cbWorkingDir); /* cbWorkingDir */ if (cbDomain > 0) Stream_Write(s, domain, cbDomain); Stream_Write_UINT16(s, 0); if (cbUserName > 0) Stream_Write(s, userName, cbUserName); Stream_Write_UINT16(s, 0); if (cbPassword > 0) Stream_Write(s, password, cbPassword); Stream_Write_UINT16(s, 0); if (cbAlternateShell > 0) Stream_Write(s, alternateShell, cbAlternateShell); Stream_Write_UINT16(s, 0); if (cbWorkingDir > 0) Stream_Write(s, workingDir, cbWorkingDir); Stream_Write_UINT16(s, 0); free(domain); free(userName); free(alternateShell); free(workingDir); if (!usedPasswordCookie) free(password); if (settings->RdpVersion >= 5) rdp_write_extended_info_packet(s, settings); /* extraInfo */ } /** * Read Client Info PDU (CLIENT_INFO_PDU).\n * @msdn{cc240474} * @param rdp RDP module * @param s stream */ BOOL rdp_recv_client_info(rdpRdp* rdp, wStream* s) { UINT16 length; UINT16 channelId; UINT16 securityFlags; if (!rdp_read_header(rdp, s, &length, &channelId)) return FALSE; if (!rdp_read_security_header(s, &securityFlags)) return FALSE; if ((securityFlags & SEC_INFO_PKT) == 0) return FALSE; if (rdp->settings->DisableEncryption) { if (securityFlags & SEC_REDIRECTION_PKT) { fprintf(stderr, "Error: SEC_REDIRECTION_PKT unsupported\n"); return FALSE; } if (securityFlags & SEC_ENCRYPT) { if (!rdp_decrypt(rdp, s, length - 4, securityFlags)) { fprintf(stderr, "rdp_decrypt failed\n"); return FALSE; } } } return rdp_read_info_packet(s, rdp->settings); } /** * Send Client Info PDU (CLIENT_INFO_PDU).\n * @msdn{cc240474} * @param rdp RDP module */ BOOL rdp_send_client_info(rdpRdp* rdp) { wStream* s; BOOL status; rdp->sec_flags |= SEC_INFO_PKT; s = Stream_New(NULL, 2048); rdp_init_stream(rdp, s); rdp_write_info_packet(s, rdp->settings); status = rdp_send(rdp, s, MCS_GLOBAL_CHANNEL_ID); Stream_Free(s, TRUE); return status; } BOOL rdp_recv_logon_info_v1(rdpRdp* rdp, wStream* s) { UINT32 cbDomain; UINT32 cbUserName; if (Stream_GetRemainingLength(s) < (4 + 52 + 4 + 512 + 4)) return FALSE; Stream_Read_UINT32(s, cbDomain); /* cbDomain (4 bytes) */ Stream_Seek(s, 52); /* domain (52 bytes) */ Stream_Read_UINT32(s, cbUserName); /* cbUserName (4 bytes) */ Stream_Seek(s, 512); /* userName (512 bytes) */ Stream_Seek_UINT32(s); /* sessionId (4 bytes) */ return TRUE; } BOOL rdp_recv_logon_info_v2(rdpRdp* rdp, wStream* s) { UINT32 cbDomain; UINT32 cbUserName; if (Stream_GetRemainingLength(s) < (2 + 4 + 4 + 4 + 4 + 558)) return FALSE; Stream_Seek_UINT16(s); /* version (2 bytes) */ Stream_Seek_UINT32(s); /* size (4 bytes) */ Stream_Seek_UINT32(s); /* sessionId (4 bytes) */ Stream_Read_UINT32(s, cbDomain); /* cbDomain (4 bytes) */ Stream_Read_UINT32(s, cbUserName); /* cbUserName (4 bytes) */ Stream_Seek(s, 558); /* pad */ if (Stream_GetRemainingLength(s) < cbDomain+cbUserName) return FALSE; Stream_Seek(s, cbDomain); /* domain */ Stream_Seek(s, cbUserName); /* userName */ return TRUE; } BOOL rdp_recv_logon_plain_notify(rdpRdp* rdp, wStream* s) { if (Stream_GetRemainingLength(s) < 576) return FALSE; Stream_Seek(s, 576); /* pad */ return TRUE; } BOOL rdp_recv_logon_error_info(rdpRdp* rdp, wStream* s) { UINT32 errorNotificationData; UINT32 errorNotificationType; if (Stream_GetRemainingLength(s) < 4) return FALSE; Stream_Read_UINT32(s, errorNotificationData); /* errorNotificationData (4 bytes) */ Stream_Read_UINT32(s, errorNotificationType); /* errorNotificationType (4 bytes) */ IFCALL(rdp->instance->LogonErrorInfo, rdp->instance, errorNotificationData, errorNotificationType); return TRUE; } BOOL rdp_recv_logon_info_extended(rdpRdp* rdp, wStream* s) { UINT32 cbFieldData; UINT32 fieldsPresent; UINT16 Length; if (Stream_GetRemainingLength(s) < 6) return FALSE; Stream_Read_UINT16(s, Length); /* The total size in bytes of this structure */ Stream_Read_UINT32(s, fieldsPresent); /* fieldsPresent (4 bytes) */ /* logonFields */ if (fieldsPresent & LOGON_EX_AUTORECONNECTCOOKIE) { if (Stream_GetRemainingLength(s) < 4) return FALSE; Stream_Read_UINT32(s, cbFieldData); /* cbFieldData (4 bytes) */ if (rdp_read_server_auto_reconnect_cookie(s, rdp->settings) == FALSE) return FALSE; } if (fieldsPresent & LOGON_EX_LOGONERRORS) { if (Stream_GetRemainingLength(s) < 4) return FALSE; Stream_Read_UINT32(s, cbFieldData); /* cbFieldData (4 bytes) */ if (rdp_recv_logon_error_info(rdp, s) == FALSE) return FALSE; } if (Stream_GetRemainingLength(s) < 570) return FALSE; Stream_Seek(s, 570); /* pad */ return TRUE; } BOOL rdp_recv_save_session_info(rdpRdp* rdp, wStream* s) { UINT32 infoType; if (Stream_GetRemainingLength(s) < 4) return FALSE; Stream_Read_UINT32(s, infoType); /* infoType (4 bytes) */ //fprintf(stderr, "%s\n", INFO_TYPE_LOGON_STRINGS[infoType]); switch (infoType) { case INFO_TYPE_LOGON: return rdp_recv_logon_info_v1(rdp, s); case INFO_TYPE_LOGON_LONG: return rdp_recv_logon_info_v2(rdp, s); case INFO_TYPE_LOGON_PLAIN_NOTIFY: return rdp_recv_logon_plain_notify(rdp, s); case INFO_TYPE_LOGON_EXTENDED_INF: return rdp_recv_logon_info_extended(rdp, s); default: break; } return TRUE; }