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FreeRDP/libfreerdp/core/gcc.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* T.124 Generic Conference Control (GCC)
*
* Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* 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 <winpr/crt.h>
#include "gcc.h"
#include "certificate.h"
/**
* T.124 GCC is defined in:
*
* http://www.itu.int/rec/T-REC-T.124-199802-S/en
* ITU-T T.124 (02/98): Generic Conference Control
*/
/**
* ConnectData ::= SEQUENCE
* {
* t124Identifier Key,
* connectPDU OCTET_STRING
* }
*
* Key ::= CHOICE
* {
* object OBJECT_IDENTIFIER,
* h221NonStandard H221NonStandardIdentifier
* }
*
* ConnectGCCPDU ::= CHOICE
* {
* conferenceCreateRequest ConferenceCreateRequest,
* conferenceCreateResponse ConferenceCreateResponse,
* conferenceQueryRequest ConferenceQueryRequest,
* conferenceQueryResponse ConferenceQueryResponse,
* conferenceJoinRequest ConferenceJoinRequest,
* conferenceJoinResponse ConferenceJoinResponse,
* conferenceInviteRequest ConferenceInviteRequest,
* conferenceInviteResponse ConferenceInviteResponse,
* ...
* }
*
* ConferenceCreateRequest ::= SEQUENCE
* {
* conferenceName ConferenceName,
* convenerPassword Password OPTIONAL,
* password Password OPTIONAL,
* lockedConference BOOLEAN,
* listedConference BOOLEAN,
* conductibleConference BOOLEAN,
* terminationMethod TerminationMethod,
* conductorPrivileges SET OF Privilege OPTIONAL,
* conductedPrivileges SET OF Privilege OPTIONAL,
* nonConductedPrivileges SET OF Privilege OPTIONAL,
* conferenceDescription TextString OPTIONAL,
* callerIdentifier TextString OPTIONAL,
* userData UserData OPTIONAL,
* ...,
* conferencePriority ConferencePriority OPTIONAL,
* conferenceMode ConferenceMode OPTIONAL
* }
*
* ConferenceCreateResponse ::= SEQUENCE
* {
* nodeID UserID,
* tag INTEGER,
* result ENUMERATED
* {
* success (0),
* userRejected (1),
* resourcesNotAvailable (2),
* rejectedForSymmetryBreaking (3),
* lockedConferenceNotSupported (4)
* },
* userData UserData OPTIONAL,
* ...
* }
*
* ConferenceName ::= SEQUENCE
* {
* numeric SimpleNumericString
* text SimpleTextString OPTIONAL,
* ...
* }
*
* SimpleNumericString ::= NumericString (SIZE (1..255)) (FROM ("0123456789"))
*
* UserData ::= SET OF SEQUENCE
* {
* key Key,
* value OCTET_STRING OPTIONAL
* }
*
* H221NonStandardIdentifier ::= OCTET STRING (SIZE (4..255))
*
* UserID ::= DynamicChannelID
*
* ChannelID ::= INTEGER (1..65535)
* StaticChannelID ::= INTEGER (1..1000)
* DynamicChannelID ::= INTEGER (1001..65535)
*
*/
/*
* OID = 0.0.20.124.0.1
* { itu-t(0) recommendation(0) t(20) t124(124) version(0) 1 }
* v.1 of ITU-T Recommendation T.124 (Feb 1998): "Generic Conference Control"
*/
BYTE t124_02_98_oid[6] = { 0, 0, 20, 124, 0, 1 };
BYTE h221_cs_key[4] = "Duca";
BYTE h221_sc_key[4] = "McDn";
/**
* Read a GCC Conference Create Request.\n
* @msdn{cc240836}
* @param s stream
* @param settings rdp settings
*/
BOOL gcc_read_conference_create_request(wStream* s, rdpSettings* settings)
{
UINT16 length;
BYTE choice;
BYTE number;
BYTE selection;
/* ConnectData */
if (!per_read_choice(s, &choice))
return FALSE;
if (!per_read_object_identifier(s, t124_02_98_oid))
return FALSE;
/* ConnectData::connectPDU (OCTET_STRING) */
if (!per_read_length(s, &length))
return FALSE;
/* ConnectGCCPDU */
if (!per_read_choice(s, &choice))
return FALSE;
if (!per_read_selection(s, &selection))
return FALSE;
/* ConferenceCreateRequest::conferenceName */
if (!per_read_numeric_string(s, 1)) /* ConferenceName::numeric */
return FALSE;
if (!per_read_padding(s, 1)) /* padding */
return FALSE;
/* UserData (SET OF SEQUENCE) */
if (!per_read_number_of_sets(s, &number) || number != 1) /* one set of UserData */
return FALSE;
if (!per_read_choice(s, &choice) || choice != 0xC0) /* UserData::value present + select h221NonStandard (1) */
return FALSE;
/* h221NonStandard */
if (!per_read_octet_string(s, h221_cs_key, 4, 4)) /* h221NonStandard, client-to-server H.221 key, "Duca" */
return FALSE;
/* userData::value (OCTET_STRING) */
if (!per_read_length(s, &length))
return FALSE;
if (stream_get_left(s) < length)
return FALSE;
if (!gcc_read_client_data_blocks(s, settings, length))
return FALSE;
return TRUE;
}
/**
* Write a GCC Conference Create Request.\n
* @msdn{cc240836}
* @param s stream
* @param user_data client data blocks
*/
void gcc_write_conference_create_request(wStream* s, wStream* user_data)
{
/* ConnectData */
per_write_choice(s, 0); /* From Key select object (0) of type OBJECT_IDENTIFIER */
per_write_object_identifier(s, t124_02_98_oid); /* ITU-T T.124 (02/98) OBJECT_IDENTIFIER */
/* ConnectData::connectPDU (OCTET_STRING) */
per_write_length(s, stream_get_length(user_data) + 14); /* connectPDU length */
/* ConnectGCCPDU */
per_write_choice(s, 0); /* From ConnectGCCPDU select conferenceCreateRequest (0) of type ConferenceCreateRequest */
per_write_selection(s, 0x08); /* select optional userData from ConferenceCreateRequest */
/* ConferenceCreateRequest::conferenceName */
per_write_numeric_string(s, (BYTE*)"1", 1, 1); /* ConferenceName::numeric */
per_write_padding(s, 1); /* padding */
/* UserData (SET OF SEQUENCE) */
per_write_number_of_sets(s, 1); /* one set of UserData */
per_write_choice(s, 0xC0); /* UserData::value present + select h221NonStandard (1) */
/* h221NonStandard */
per_write_octet_string(s, h221_cs_key, 4, 4); /* h221NonStandard, client-to-server H.221 key, "Duca" */
/* userData::value (OCTET_STRING) */
per_write_octet_string(s, user_data->buffer, stream_get_length(user_data), 0); /* array of client data blocks */
}
BOOL gcc_read_conference_create_response(wStream* s, rdpSettings* settings)
{
UINT16 length;
UINT32 tag;
UINT16 nodeID;
BYTE result;
BYTE choice;
BYTE number;
/* ConnectData */
per_read_choice(s, &choice);
per_read_object_identifier(s, t124_02_98_oid);
/* ConnectData::connectPDU (OCTET_STRING) */
per_read_length(s, &length);
/* ConnectGCCPDU */
per_read_choice(s, &choice);
/* ConferenceCreateResponse::nodeID (UserID) */
per_read_integer16(s, &nodeID, 1001);
/* ConferenceCreateResponse::tag (INTEGER) */
per_read_integer(s, &tag);
/* ConferenceCreateResponse::result (ENUMERATED) */
per_read_enumerated(s, &result, MCS_Result_enum_length);
/* number of UserData sets */
per_read_number_of_sets(s, &number);
/* UserData::value present + select h221NonStandard (1) */
per_read_choice(s, &choice);
/* h221NonStandard */
if (!per_read_octet_string(s, h221_sc_key, 4, 4)) /* h221NonStandard, server-to-client H.221 key, "McDn" */
return FALSE;
/* userData (OCTET_STRING) */
per_read_length(s, &length);
if (!gcc_read_server_data_blocks(s, settings, length))
{
fprintf(stderr, "gcc_read_conference_create_response: gcc_read_server_data_blocks failed\n");
return FALSE;
}
return TRUE;
}
void gcc_write_conference_create_response(wStream* s, wStream* user_data)
{
/* ConnectData */
per_write_choice(s, 0);
per_write_object_identifier(s, t124_02_98_oid);
/* ConnectData::connectPDU (OCTET_STRING) */
per_write_length(s, stream_get_length(user_data) + 2);
/* ConnectGCCPDU */
per_write_choice(s, 0x14);
/* ConferenceCreateResponse::nodeID (UserID) */
per_write_integer16(s, 0x79F3, 1001);
/* ConferenceCreateResponse::tag (INTEGER) */
per_write_integer(s, 1);
/* ConferenceCreateResponse::result (ENUMERATED) */
per_write_enumerated(s, 0, MCS_Result_enum_length);
/* number of UserData sets */
per_write_number_of_sets(s, 1);
/* UserData::value present + select h221NonStandard (1) */
per_write_choice(s, 0xC0);
/* h221NonStandard */
per_write_octet_string(s, h221_sc_key, 4, 4); /* h221NonStandard, server-to-client H.221 key, "McDn" */
/* userData (OCTET_STRING) */
per_write_octet_string(s, user_data->buffer, stream_get_length(user_data), 0); /* array of server data blocks */
}
BOOL gcc_read_client_data_blocks(wStream* s, rdpSettings* settings, int length)
{
UINT16 type;
UINT16 blockLength;
int pos;
while (length > 0)
{
pos = stream_get_pos(s);
if(!gcc_read_user_data_header(s, &type, &blockLength))
return FALSE;
switch (type)
{
case CS_CORE:
if (!gcc_read_client_core_data(s, settings, blockLength - 4))
return FALSE;
break;
case CS_SECURITY:
if (!gcc_read_client_security_data(s, settings, blockLength - 4))
return FALSE;
break;
case CS_NET:
if (!gcc_read_client_network_data(s, settings, blockLength - 4))
return FALSE;
break;
case CS_CLUSTER:
if (!gcc_read_client_cluster_data(s, settings, blockLength - 4))
return FALSE;
break;
case CS_MONITOR:
if (!gcc_read_client_monitor_data(s, settings, blockLength - 4))
return FALSE;
break;
default:
break;
}
length -= blockLength;
stream_set_pos(s, pos + blockLength);
}
return TRUE;
}
void gcc_write_client_data_blocks(wStream* s, rdpSettings* settings)
{
gcc_write_client_core_data(s, settings);
gcc_write_client_cluster_data(s, settings);
gcc_write_client_security_data(s, settings);
gcc_write_client_network_data(s, settings);
/* extended client data supported */
if (settings->NegotiationFlags & EXTENDED_CLIENT_DATA_SUPPORTED)
{
if (!settings->SpanMonitors)
{
gcc_write_client_monitor_data(s, settings);
}
}
else
{
if (settings->UseMultimon)
{
fprintf(stderr, "WARNING: true multi monitor support was not advertised by server!\n");
if (settings->ForceMultimon)
{
fprintf(stderr, "Sending multi monitor information anyway (may break connectivity!)\n");
gcc_write_client_monitor_data(s, settings);
}
else
{
fprintf(stderr, "Use /multimon:force to force sending multi monitor information\n");
}
}
}
}
BOOL gcc_read_server_data_blocks(wStream* s, rdpSettings* settings, int length)
{
UINT16 type;
UINT16 offset = 0;
UINT16 blockLength;
BYTE* holdp;
while (offset < length)
{
holdp = s->pointer;
if (!gcc_read_user_data_header(s, &type, &blockLength))
{
fprintf(stderr, "gcc_read_server_data_blocks: gcc_read_user_data_header failed\n");
return FALSE;
}
switch (type)
{
case SC_CORE:
if (!gcc_read_server_core_data(s, settings))
{
fprintf(stderr, "gcc_read_server_data_blocks: gcc_read_server_core_data failed\n");
return FALSE;
}
break;
case SC_SECURITY:
if (!gcc_read_server_security_data(s, settings))
{
fprintf(stderr, "gcc_read_server_data_blocks: gcc_read_server_security_data failed\n");
return FALSE;
}
break;
case SC_NET:
if (!gcc_read_server_network_data(s, settings))
{
fprintf(stderr, "gcc_read_server_data_blocks: gcc_read_server_network_data failed\n");
return FALSE;
}
break;
default:
fprintf(stderr, "gcc_read_server_data_blocks: ignoring type=%hu\n", type);
break;
}
offset += blockLength;
s->pointer = holdp + blockLength;
}
return TRUE;
}
void gcc_write_server_data_blocks(wStream* s, rdpSettings* settings)
{
gcc_write_server_core_data(s, settings);
gcc_write_server_network_data(s, settings);
gcc_write_server_security_data(s, settings);
}
BOOL gcc_read_user_data_header(wStream* s, UINT16* type, UINT16* length)
{
if (stream_get_left(s) < 4)
return FALSE;
stream_read_UINT16(s, *type); /* type */
stream_read_UINT16(s, *length); /* length */
if (stream_get_left(s) < *length - 4)
return FALSE;
return TRUE;
}
/**
* Write a user data header (TS_UD_HEADER).\n
* @msdn{cc240509}
* @param s stream
* @param type data block type
* @param length data block length
*/
void gcc_write_user_data_header(wStream* s, UINT16 type, UINT16 length)
{
stream_write_UINT16(s, type); /* type */
stream_write_UINT16(s, length); /* length */
}
/**
* Read a client core data block (TS_UD_CS_CORE).\n
* @msdn{cc240510}
* @param s stream
* @param settings rdp settings
*/
BOOL gcc_read_client_core_data(wStream* s, rdpSettings* settings, UINT16 blockLength)
{
char* str = NULL;
UINT32 version;
UINT32 color_depth;
UINT16 colorDepth = 0;
UINT16 postBeta2ColorDepth = 0;
UINT16 highColorDepth = 0;
UINT16 supportedColorDepths = 0;
UINT32 serverSelectedProtocol = 0;
/* Length of all required fields, until imeFileName */
if (blockLength < 128)
return FALSE;
stream_read_UINT32(s, version); /* version */
settings->RdpVersion = (version == RDP_VERSION_4 ? 4 : 7);
stream_read_UINT16(s, settings->DesktopWidth); /* DesktopWidth */
stream_read_UINT16(s, settings->DesktopHeight); /* DesktopHeight */
stream_read_UINT16(s, colorDepth); /* ColorDepth */
stream_seek_UINT16(s); /* SASSequence (Secure Access Sequence) */
stream_read_UINT32(s, settings->KeyboardLayout); /* KeyboardLayout */
stream_read_UINT32(s, settings->ClientBuild); /* ClientBuild */
/* clientName (32 bytes, null-terminated unicode, truncated to 15 characters) */
ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) stream_get_tail(s), 32 / 2, &str, 0, NULL, NULL);
stream_seek(s, 32);
sprintf_s(settings->ClientHostname, 31, "%s", str);
settings->ClientHostname[31] = 0;
free(str);
str = NULL;
stream_read_UINT32(s, settings->KeyboardType); /* KeyboardType */
stream_read_UINT32(s, settings->KeyboardSubType); /* KeyboardSubType */
stream_read_UINT32(s, settings->KeyboardFunctionKey); /* KeyboardFunctionKey */
stream_seek(s, 64); /* imeFileName */
blockLength -= 128;
/**
* The following fields are all optional. If one field is present, all of the preceding
* fields MUST also be present. If one field is not present, all of the subsequent fields
* MUST NOT be present.
* We must check the bytes left before reading each field.
*/
do
{
if (blockLength < 2)
break;
stream_read_UINT16(s, postBeta2ColorDepth); /* postBeta2ColorDepth */
blockLength -= 2;
if (blockLength < 2)
break;
stream_seek_UINT16(s); /* clientProductID */
blockLength -= 2;
if (blockLength < 4)
break;
stream_seek_UINT32(s); /* serialNumber */
blockLength -= 4;
if (blockLength < 2)
break;
stream_read_UINT16(s, highColorDepth); /* highColorDepth */
blockLength -= 2;
if (blockLength < 2)
break;
stream_read_UINT16(s, supportedColorDepths); /* supportedColorDepths */
blockLength -= 2;
if (blockLength < 2)
break;
stream_read_UINT16(s, settings->EarlyCapabilityFlags); /* earlyCapabilityFlags */
blockLength -= 2;
if (blockLength < 64)
break;
ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) stream_get_tail(s), 64 / 2, &str, 0, NULL, NULL);
stream_seek(s, 64);
sprintf_s(settings->ClientProductId, 32, "%s", str);
free(str);
blockLength -= 64;
if (blockLength < 1)
break;
stream_read_BYTE(s, settings->PerformanceFlags); /* connectionType */
blockLength -= 1;
if (blockLength < 1)
break;
stream_seek_BYTE(s); /* pad1octet */
blockLength -= 1;
if (blockLength < 4)
break;
stream_read_UINT32(s, serverSelectedProtocol); /* serverSelectedProtocol */
blockLength -= 4;
if (settings->SelectedProtocol != serverSelectedProtocol)
return FALSE;
} while (0);
if (highColorDepth > 0)
{
if (settings->EarlyCapabilityFlags & RNS_UD_CS_WANT_32BPP_SESSION)
color_depth = 32;
else
color_depth = highColorDepth;
}
else if (postBeta2ColorDepth > 0)
{
switch (postBeta2ColorDepth)
{
case RNS_UD_COLOR_4BPP:
color_depth = 4;
break;
case RNS_UD_COLOR_8BPP:
color_depth = 8;
break;
case RNS_UD_COLOR_16BPP_555:
color_depth = 15;
break;
case RNS_UD_COLOR_16BPP_565:
color_depth = 16;
break;
case RNS_UD_COLOR_24BPP:
color_depth = 24;
break;
default:
return FALSE;
}
}
else
{
switch (colorDepth)
{
case RNS_UD_COLOR_4BPP:
color_depth = 4;
break;
case RNS_UD_COLOR_8BPP:
color_depth = 8;
break;
default:
return FALSE;
}
}
/*
* If we are in server mode, accept client's color depth only if
* it is smaller than ours. This is what Windows server does.
*/
if ((color_depth < settings->ColorDepth) || !settings->ServerMode)
settings->ColorDepth = color_depth;
return TRUE;
}
/**
* Write a client core data block (TS_UD_CS_CORE).\n
* @msdn{cc240510}
* @param s stream
* @param settings rdp settings
*/
void gcc_write_client_core_data(wStream* s, rdpSettings* settings)
{
UINT32 version;
WCHAR* clientName = NULL;
int clientNameLength;
BYTE connectionType;
UINT16 highColorDepth;
UINT16 supportedColorDepths;
UINT16 earlyCapabilityFlags;
WCHAR* clientDigProductId = NULL;
int clientDigProductIdLength;
gcc_write_user_data_header(s, CS_CORE, 216);
version = settings->RdpVersion >= 5 ? RDP_VERSION_5_PLUS : RDP_VERSION_4;
clientNameLength = ConvertToUnicode(CP_UTF8, 0, settings->ClientHostname, -1, &clientName, 0);
clientDigProductIdLength = ConvertToUnicode(CP_UTF8, 0, settings->ClientProductId, -1, &clientDigProductId, 0);
stream_write_UINT32(s, version); /* Version */
stream_write_UINT16(s, settings->DesktopWidth); /* DesktopWidth */
stream_write_UINT16(s, settings->DesktopHeight); /* DesktopHeight */
stream_write_UINT16(s, RNS_UD_COLOR_8BPP); /* ColorDepth, ignored because of postBeta2ColorDepth */
stream_write_UINT16(s, RNS_UD_SAS_DEL); /* SASSequence (Secure Access Sequence) */
stream_write_UINT32(s, settings->KeyboardLayout); /* KeyboardLayout */
stream_write_UINT32(s, settings->ClientBuild); /* ClientBuild */
/* clientName (32 bytes, null-terminated unicode, truncated to 15 characters) */
if (clientNameLength >= 16)
{
clientNameLength = 16;
clientName[clientNameLength-1] = 0;
}
stream_write(s, clientName, (clientNameLength * 2));
stream_write_zero(s, 32 - (clientNameLength * 2));
free(clientName);
stream_write_UINT32(s, settings->KeyboardType); /* KeyboardType */
stream_write_UINT32(s, settings->KeyboardSubType); /* KeyboardSubType */
stream_write_UINT32(s, settings->KeyboardFunctionKey); /* KeyboardFunctionKey */
stream_write_zero(s, 64); /* imeFileName */
stream_write_UINT16(s, RNS_UD_COLOR_8BPP); /* postBeta2ColorDepth */
stream_write_UINT16(s, 1); /* clientProductID */
stream_write_UINT32(s, 0); /* serialNumber (should be initialized to 0) */
highColorDepth = MIN(settings->ColorDepth, 24);
supportedColorDepths =
RNS_UD_24BPP_SUPPORT |
RNS_UD_16BPP_SUPPORT |
RNS_UD_15BPP_SUPPORT;
connectionType = settings->ConnectionType;
earlyCapabilityFlags = RNS_UD_CS_SUPPORT_ERRINFO_PDU;
if (settings->RemoteFxCodec)
connectionType = CONNECTION_TYPE_LAN;
if (connectionType != 0)
earlyCapabilityFlags |= RNS_UD_CS_VALID_CONNECTION_TYPE;
if (settings->ColorDepth == 32)
{
supportedColorDepths |= RNS_UD_32BPP_SUPPORT;
earlyCapabilityFlags |= RNS_UD_CS_WANT_32BPP_SESSION;
}
stream_write_UINT16(s, highColorDepth); /* highColorDepth */
stream_write_UINT16(s, supportedColorDepths); /* supportedColorDepths */
stream_write_UINT16(s, earlyCapabilityFlags); /* earlyCapabilityFlags */
/* clientDigProductId (64 bytes, null-terminated unicode, truncated to 31 characters) */
if (clientDigProductIdLength >= 32)
{
clientDigProductIdLength = 32;
clientDigProductId[clientDigProductIdLength-1] = 0;
}
stream_write(s, clientDigProductId, (clientDigProductIdLength * 2) );
stream_write_zero(s, 64 - (clientDigProductIdLength * 2) );
free(clientDigProductId);
stream_write_BYTE(s, connectionType); /* connectionType */
stream_write_BYTE(s, 0); /* pad1octet */
stream_write_UINT32(s, settings->SelectedProtocol); /* serverSelectedProtocol */
}
BOOL gcc_read_server_core_data(wStream* s, rdpSettings* settings)
{
UINT32 version;
UINT32 clientRequestedProtocols;
if(stream_get_left(s) < 8)
return FALSE;
stream_read_UINT32(s, version); /* version */
stream_read_UINT32(s, clientRequestedProtocols); /* clientRequestedProtocols */
if (version == RDP_VERSION_4 && settings->RdpVersion > 4)
settings->RdpVersion = 4;
else if (version == RDP_VERSION_5_PLUS && settings->RdpVersion < 5)
settings->RdpVersion = 7;
return TRUE;
}
void gcc_write_server_core_data(wStream* s, rdpSettings* settings)
{
gcc_write_user_data_header(s, SC_CORE, 12);
stream_write_UINT32(s, settings->RdpVersion == 4 ? RDP_VERSION_4 : RDP_VERSION_5_PLUS);
stream_write_UINT32(s, settings->RequestedProtocols); /* clientRequestedProtocols */
}
/**
* Read a client security data block (TS_UD_CS_SEC).\n
* @msdn{cc240511}
* @param s stream
* @param settings rdp settings
*/
BOOL gcc_read_client_security_data(wStream* s, rdpSettings* settings, UINT16 blockLength)
{
if (blockLength < 8)
return FALSE;
if (settings->DisableEncryption)
{
stream_read_UINT32(s, settings->EncryptionMethods); /* encryptionMethods */
if (settings->EncryptionMethods == 0)
stream_read_UINT32(s, settings->EncryptionMethods); /* extEncryptionMethods */
}
else
{
stream_seek(s, 8);
}
return TRUE;
}
/**
* Write a client security data block (TS_UD_CS_SEC).\n
* @msdn{cc240511}
* @param s stream
* @param settings rdp settings
*/
void gcc_write_client_security_data(wStream* s, rdpSettings* settings)
{
gcc_write_user_data_header(s, CS_SECURITY, 12);
if (settings->DisableEncryption)
{
stream_write_UINT32(s, settings->EncryptionMethods); /* encryptionMethods */
stream_write_UINT32(s, 0); /* extEncryptionMethods */
}
else
{
/* French locale, disable encryption */
stream_write_UINT32(s, 0); /* encryptionMethods */
stream_write_UINT32(s, settings->EncryptionMethods); /* extEncryptionMethods */
}
}
BOOL gcc_read_server_security_data(wStream* s, rdpSettings* settings)
{
BYTE* data;
UINT32 length;
if (stream_get_left(s) < 8)
return FALSE;
stream_read_UINT32(s, settings->EncryptionMethods); /* encryptionMethod */
stream_read_UINT32(s, settings->EncryptionLevel); /* encryptionLevel */
if (settings->EncryptionMethods == 0 && settings->EncryptionLevel == 0)
{
/* serverRandom and serverRandom must not be present */
settings->DisableEncryption = FALSE;
settings->EncryptionMethods = ENCRYPTION_METHOD_NONE;
settings->EncryptionLevel = ENCRYPTION_LEVEL_NONE;
return TRUE;
}
if (stream_get_left(s) < 8)
return FALSE;
stream_read_UINT32(s, settings->ServerRandomLength); /* serverRandomLen */
stream_read_UINT32(s, settings->ServerCertificateLength); /* serverCertLen */
if (stream_get_left(s) < settings->ServerRandomLength + settings->ServerCertificateLength)
return FALSE;
if (settings->ServerRandomLength > 0)
{
/* serverRandom */
settings->ServerRandom = (BYTE*) malloc(settings->ServerRandomLength);
stream_read(s, settings->ServerRandom, settings->ServerRandomLength);
}
else
{
return FALSE;
}
if (settings->ServerCertificateLength > 0)
{
/* serverCertificate */
settings->ServerCertificate = (BYTE*) malloc(settings->ServerCertificateLength);
stream_read(s, settings->ServerCertificate, settings->ServerCertificateLength);
certificate_free(settings->RdpServerCertificate);
settings->RdpServerCertificate = certificate_new();
data = settings->ServerCertificate;
length = settings->ServerCertificateLength;
if (certificate_read_server_certificate(settings->RdpServerCertificate, data, length) < 1)
return FALSE;
}
else
{
return FALSE;
}
return TRUE;
}
static const BYTE initial_signature[] =
{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x01
};
/*
* Terminal Services Signing Keys.
* Yes, Terminal Services Private Key is publicly available.
*/
const BYTE tssk_modulus[] =
{
0x3d, 0x3a, 0x5e, 0xbd, 0x72, 0x43, 0x3e, 0xc9,
0x4d, 0xbb, 0xc1, 0x1e, 0x4a, 0xba, 0x5f, 0xcb,
0x3e, 0x88, 0x20, 0x87, 0xef, 0xf5, 0xc1, 0xe2,
0xd7, 0xb7, 0x6b, 0x9a, 0xf2, 0x52, 0x45, 0x95,
0xce, 0x63, 0x65, 0x6b, 0x58, 0x3a, 0xfe, 0xef,
0x7c, 0xe7, 0xbf, 0xfe, 0x3d, 0xf6, 0x5c, 0x7d,
0x6c, 0x5e, 0x06, 0x09, 0x1a, 0xf5, 0x61, 0xbb,
0x20, 0x93, 0x09, 0x5f, 0x05, 0x6d, 0xea, 0x87
};
const BYTE tssk_privateExponent[] =
{
0x87, 0xa7, 0x19, 0x32, 0xda, 0x11, 0x87, 0x55,
0x58, 0x00, 0x16, 0x16, 0x25, 0x65, 0x68, 0xf8,
0x24, 0x3e, 0xe6, 0xfa, 0xe9, 0x67, 0x49, 0x94,
0xcf, 0x92, 0xcc, 0x33, 0x99, 0xe8, 0x08, 0x60,
0x17, 0x9a, 0x12, 0x9f, 0x24, 0xdd, 0xb1, 0x24,
0x99, 0xc7, 0x3a, 0xb8, 0x0a, 0x7b, 0x0d, 0xdd,
0x35, 0x07, 0x79, 0x17, 0x0b, 0x51, 0x9b, 0xb3,
0xc7, 0x10, 0x01, 0x13, 0xe7, 0x3f, 0xf3, 0x5f
};
const BYTE tssk_exponent[] =
{
0x5b, 0x7b, 0x88, 0xc0
};
void gcc_write_server_security_data(wStream* s, rdpSettings* settings)
{
CryptoMd5 md5;
BYTE* sigData;
int expLen, keyLen, sigDataLen;
BYTE encryptedSignature[TSSK_KEY_LENGTH];
BYTE signature[sizeof(initial_signature)];
UINT32 headerLen, serverRandomLen, serverCertLen, wPublicKeyBlobLen;
if (!settings->DisableEncryption)
{
settings->EncryptionMethods = ENCRYPTION_METHOD_NONE;
settings->EncryptionLevel = ENCRYPTION_LEVEL_NONE;
}
else if ((settings->EncryptionMethods & ENCRYPTION_METHOD_FIPS) != 0)
{
settings->EncryptionMethods = ENCRYPTION_METHOD_FIPS;
}
else if ((settings->EncryptionMethods & ENCRYPTION_METHOD_128BIT) != 0)
{
settings->EncryptionMethods = ENCRYPTION_METHOD_128BIT;
}
else if ((settings->EncryptionMethods & ENCRYPTION_METHOD_40BIT) != 0)
{
settings->EncryptionMethods = ENCRYPTION_METHOD_40BIT;
}
if (settings->EncryptionMethods != ENCRYPTION_METHOD_NONE)
settings->EncryptionLevel = ENCRYPTION_LEVEL_CLIENT_COMPATIBLE;
headerLen = 12;
keyLen = 0;
wPublicKeyBlobLen = 0;
serverRandomLen = 0;
serverCertLen = 0;
if (settings->EncryptionMethods != ENCRYPTION_METHOD_NONE ||
settings->EncryptionLevel != ENCRYPTION_LEVEL_NONE)
{
serverRandomLen = 32;
keyLen = settings->RdpServerRsaKey->ModulusLength;
expLen = sizeof(settings->RdpServerRsaKey->exponent);
wPublicKeyBlobLen = 4; /* magic (RSA1) */
wPublicKeyBlobLen += 4; /* keylen */
wPublicKeyBlobLen += 4; /* bitlen */
wPublicKeyBlobLen += 4; /* datalen */
wPublicKeyBlobLen += expLen;
wPublicKeyBlobLen += keyLen;
wPublicKeyBlobLen += 8; /* 8 bytes of zero padding */
serverCertLen = 4; /* dwVersion */
serverCertLen += 4; /* dwSigAlgId */
serverCertLen += 4; /* dwKeyAlgId */
serverCertLen += 2; /* wPublicKeyBlobType */
serverCertLen += 2; /* wPublicKeyBlobLen */
serverCertLen += wPublicKeyBlobLen;
serverCertLen += 2; /* wSignatureBlobType */
serverCertLen += 2; /* wSignatureBlobLen */
serverCertLen += sizeof(encryptedSignature); /* SignatureBlob */
serverCertLen += 8; /* 8 bytes of zero padding */
headerLen += sizeof(serverRandomLen);
headerLen += sizeof(serverCertLen);
headerLen += serverRandomLen;
headerLen += serverCertLen;
}
gcc_write_user_data_header(s, SC_SECURITY, headerLen);
stream_write_UINT32(s, settings->EncryptionMethods); /* encryptionMethod */
stream_write_UINT32(s, settings->EncryptionLevel); /* encryptionLevel */
if (settings->EncryptionMethods == ENCRYPTION_METHOD_NONE &&
settings->EncryptionLevel == ENCRYPTION_LEVEL_NONE)
{
return;
}
stream_write_UINT32(s, serverRandomLen); /* serverRandomLen */
stream_write_UINT32(s, serverCertLen); /* serverCertLen */
settings->ServerRandomLength = serverRandomLen;
settings->ServerRandom = (BYTE*) malloc(serverRandomLen);
crypto_nonce(settings->ServerRandom, serverRandomLen);
stream_write(s, settings->ServerRandom, serverRandomLen);
sigData = stream_get_tail(s);
stream_write_UINT32(s, CERT_CHAIN_VERSION_1); /* dwVersion (4 bytes) */
stream_write_UINT32(s, SIGNATURE_ALG_RSA); /* dwSigAlgId */
stream_write_UINT32(s, KEY_EXCHANGE_ALG_RSA); /* dwKeyAlgId */
stream_write_UINT16(s, BB_RSA_KEY_BLOB); /* wPublicKeyBlobType */
stream_write_UINT16(s, wPublicKeyBlobLen); /* wPublicKeyBlobLen */
stream_write(s, "RSA1", 4); /* magic */
stream_write_UINT32(s, keyLen + 8); /* keylen */
stream_write_UINT32(s, keyLen * 8); /* bitlen */
stream_write_UINT32(s, keyLen - 1); /* datalen */
stream_write(s, settings->RdpServerRsaKey->exponent, expLen);
stream_write(s, settings->RdpServerRsaKey->Modulus, keyLen);
stream_write_zero(s, 8);
sigDataLen = stream_get_tail(s) - sigData;
stream_write_UINT16(s, BB_RSA_SIGNATURE_BLOB); /* wSignatureBlobType */
stream_write_UINT16(s, keyLen + 8); /* wSignatureBlobLen */
memcpy(signature, initial_signature, sizeof(initial_signature));
md5 = crypto_md5_init();
crypto_md5_update(md5, sigData, sigDataLen);
crypto_md5_final(md5, signature);
crypto_rsa_private_encrypt(signature, sizeof(signature), TSSK_KEY_LENGTH,
tssk_modulus, tssk_privateExponent, encryptedSignature);
stream_write(s, encryptedSignature, sizeof(encryptedSignature));
stream_write_zero(s, 8);
}
/**
* Read a client network data block (TS_UD_CS_NET).\n
* @msdn{cc240512}
* @param s stream
* @param settings rdp settings
*/
BOOL gcc_read_client_network_data(wStream* s, rdpSettings* settings, UINT16 blockLength)
{
int i;
if (blockLength < 4)
return FALSE;
stream_read_UINT32(s, settings->ChannelCount); /* channelCount */
if (blockLength < 4 + settings->ChannelCount * 12)
return FALSE;
if (settings->ChannelCount > 16)
return FALSE;
/* channelDefArray */
for (i = 0; i < settings->ChannelCount; i++)
{
/* CHANNEL_DEF */
stream_read(s, settings->ChannelDefArray[i].Name, 8); /* name (8 bytes) */
stream_read_UINT32(s, settings->ChannelDefArray[i].options); /* options (4 bytes) */
settings->ChannelDefArray[i].ChannelId = MCS_GLOBAL_CHANNEL_ID + 1 + i;
}
return TRUE;
}
/**
* Write a client network data block (TS_UD_CS_NET).\n
* @msdn{cc240512}
* @param s stream
* @param settings rdp settings
*/
void gcc_write_client_network_data(wStream* s, rdpSettings* settings)
{
int i;
UINT16 length;
if (settings->ChannelCount > 0)
{
length = settings->ChannelCount * 12 + 8;
gcc_write_user_data_header(s, CS_NET, length);
stream_write_UINT32(s, settings->ChannelCount); /* channelCount */
/* channelDefArray */
for (i = 0; i < settings->ChannelCount; i++)
{
/* CHANNEL_DEF */
stream_write(s, settings->ChannelDefArray[i].Name, 8); /* name (8 bytes) */
stream_write_UINT32(s, settings->ChannelDefArray[i].options); /* options (4 bytes) */
}
}
}
BOOL gcc_read_server_network_data(wStream* s, rdpSettings* settings)
{
int i;
UINT16 MCSChannelId;
UINT16 channelCount;
UINT16 channelId;
if(stream_get_left(s) < 4)
return FALSE;
stream_read_UINT16(s, MCSChannelId); /* MCSChannelId */
stream_read_UINT16(s, channelCount); /* channelCount */
if (channelCount != settings->ChannelCount)
{
fprintf(stderr, "requested %d channels, got %d instead\n",
settings->ChannelCount, channelCount);
}
if(stream_get_left(s) < channelCount * 2)
return FALSE;
for (i = 0; i < channelCount; i++)
{
stream_read_UINT16(s, channelId); /* channelId */
settings->ChannelDefArray[i].ChannelId = channelId;
}
if (channelCount % 2 == 1)
return stream_skip(s, 2); /* padding */
return TRUE;
}
void gcc_write_server_network_data(wStream* s, rdpSettings* settings)
{
int i;
gcc_write_user_data_header(s, SC_NET, 8 + settings->ChannelCount * 2 + (settings->ChannelCount % 2 == 1 ? 2 : 0));
stream_write_UINT16(s, MCS_GLOBAL_CHANNEL_ID); /* MCSChannelId */
stream_write_UINT16(s, settings->ChannelCount); /* channelCount */
for (i = 0; i < settings->ChannelCount; i++)
{
stream_write_UINT16(s, settings->ChannelDefArray[i].ChannelId);
}
if (settings->ChannelCount % 2 == 1)
stream_write_UINT16(s, 0);
}
/**
* Read a client cluster data block (TS_UD_CS_CLUSTER).\n
* @msdn{cc240514}
* @param s stream
* @param settings rdp settings
*/
BOOL gcc_read_client_cluster_data(wStream* s, rdpSettings* settings, UINT16 blockLength)
{
UINT32 flags;
if (blockLength < 4)
return FALSE;
stream_read_UINT32(s, flags); /* flags */
if ((flags & REDIRECTED_SESSIONID_FIELD_VALID))
{
if(blockLength < 8)
return FALSE;
stream_read_UINT32(s, settings->RedirectedSessionId); /* redirectedSessionID */
}
return TRUE;
}
/**
* Write a client cluster data block (TS_UD_CS_CLUSTER).\n
* @msdn{cc240514}
* @param s stream
* @param settings rdp settings
*/
void gcc_write_client_cluster_data(wStream* s, rdpSettings* settings)
{
UINT32 flags;
gcc_write_user_data_header(s, CS_CLUSTER, 12);
flags = REDIRECTION_SUPPORTED | (REDIRECTION_VERSION4 << 2);
if (settings->ConsoleSession || settings->RedirectedSessionId)
flags |= REDIRECTED_SESSIONID_FIELD_VALID;
stream_write_UINT32(s, flags); /* flags */
stream_write_UINT32(s, settings->RedirectedSessionId); /* redirectedSessionID */
}
/**
* Read a client monitor data block (TS_UD_CS_MONITOR).\n
* @msdn{dd305336}
* @param s stream
* @param settings rdp settings
*/
BOOL gcc_read_client_monitor_data(wStream* s, rdpSettings* settings, UINT16 blockLength)
{
fprintf(stderr, "CS_MONITOR\n");
return TRUE;
}
/**
* Write a client monitor data block (TS_UD_CS_MONITOR).\n
* @msdn{dd305336}
* @param s stream
* @param settings rdp settings
*/
void gcc_write_client_monitor_data(wStream* s, rdpSettings* settings)
{
int i;
UINT16 length;
UINT32 left, top, right, bottom, flags;
if (settings->MonitorCount > 1)
{
length = (20 * settings->MonitorCount) + 12;
gcc_write_user_data_header(s, CS_MONITOR, length);
stream_write_UINT32(s, 0); /* flags */
stream_write_UINT32(s, settings->MonitorCount); /* monitorCount */
for (i = 0; i < settings->MonitorCount; i++)
{
left = settings->MonitorDefArray[i].x;
top = settings->MonitorDefArray[i].y;
right = settings->MonitorDefArray[i].x + settings->MonitorDefArray[i].width - 1;
bottom = settings->MonitorDefArray[i].y + settings->MonitorDefArray[i].height - 1;
flags = settings->MonitorDefArray[i].is_primary ? MONITOR_PRIMARY : 0;
stream_write_UINT32(s, left); /* left */
stream_write_UINT32(s, top); /* top */
stream_write_UINT32(s, right); /* right */
stream_write_UINT32(s, bottom); /* bottom */
stream_write_UINT32(s, flags); /* flags */
}
}
}
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