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FreeRDP/channels/rdpei/rdpei_common.c
Hardening ed6f380434 Add server-side RDPEI 
This patch mutualize code between client and server for RDPEI. And add support for
the server-side.
2014-11-20 22:19:29 +01:00

611 lines
12 KiB
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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Input Virtual Channel Extension
*
* Copyright 2013 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* Copyright 2014 David Fort <contact@hardening-consulting.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 <winpr/stream.h>
#include "rdpei_common.h"
BOOL rdpei_read_2byte_unsigned(wStream* s, UINT32* value)
{
BYTE byte;
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, byte);
if (byte & 0x80)
{
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
*value = (byte & 0x7F) << 8;
Stream_Read_UINT8(s, byte);
*value |= byte;
}
else
{
*value = (byte & 0x7F);
}
return TRUE;
}
BOOL rdpei_write_2byte_unsigned(wStream* s, UINT32 value)
{
BYTE byte;
if (value > 0x7FFF)
return FALSE;
if (value >= 0x7F)
{
byte = ((value & 0x7F00) >> 8);
Stream_Write_UINT8(s, byte | 0x80);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else
{
byte = (value & 0x7F);
Stream_Write_UINT8(s, byte);
}
return TRUE;
}
BOOL rdpei_read_2byte_signed(wStream* s, INT32* value)
{
BYTE byte;
BOOL negative;
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, byte);
negative = (byte & 0x40) ? TRUE : FALSE;
*value = (byte & 0x3F);
if (byte & 0x80)
{
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, byte);
*value = (*value << 8) | byte;
}
if (negative)
*value *= -1;
return TRUE;
}
BOOL rdpei_write_2byte_signed(wStream* s, INT32 value)
{
BYTE byte;
BOOL negative = FALSE;
if (value < 0)
{
negative = TRUE;
value *= -1;
}
if (value > 0x3FFF)
return FALSE;
if (value >= 0x3F)
{
byte = ((value & 0x3F00) >> 8);
if (negative)
byte |= 0x40;
Stream_Write_UINT8(s, byte | 0x80);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else
{
byte = (value & 0x3F);
if (negative)
byte |= 0x40;
Stream_Write_UINT8(s, byte);
}
return TRUE;
}
BOOL rdpei_read_4byte_unsigned(wStream* s, UINT32* value)
{
BYTE byte;
BYTE count;
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, byte);
count = (byte & 0xC0) >> 6;
if (Stream_GetRemainingLength(s) < count)
return FALSE;
switch (count)
{
case 0:
*value = (byte & 0x3F);
break;
case 1:
*value = (byte & 0x3F) << 8;
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 2:
*value = (byte & 0x3F) << 16;
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 3:
*value = (byte & 0x3F) << 24;
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
default:
break;
}
return TRUE;
}
BOOL rdpei_write_4byte_unsigned(wStream* s, UINT32 value)
{
BYTE byte;
if (value <= 0x3F)
{
Stream_Write_UINT8(s, value);
}
else if (value <= 0x3FFF)
{
byte = (value >> 8) & 0x3F;
Stream_Write_UINT8(s, byte | 0x40);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x3FFFFF)
{
byte = (value >> 16) & 0x3F;
Stream_Write_UINT8(s, byte | 0x80);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x3FFFFF)
{
byte = (value >> 24) & 0x3F;
Stream_Write_UINT8(s, byte | 0xC0);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else
{
return FALSE;
}
return TRUE;
}
BOOL rdpei_read_4byte_signed(wStream* s, INT32* value)
{
BYTE byte;
BYTE count;
BOOL negative;
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, byte);
count = (byte & 0xC0) >> 6;
negative = (byte & 0x20);
if (Stream_GetRemainingLength(s) < count)
return FALSE;
switch (count)
{
case 0:
*value = (byte & 0x1F);
break;
case 1:
*value = (byte & 0x1F) << 8;
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 2:
*value = (byte & 0x1F) << 16;
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 3:
*value = (byte & 0x1F) << 24;
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
default:
break;
}
if (negative)
*value *= -1;
return TRUE;
}
BOOL rdpei_write_4byte_signed(wStream* s, INT32 value)
{
BYTE byte;
BOOL negative = FALSE;
if (value < 0)
{
negative = TRUE;
value *= -1;
}
if (value <= 0x1F)
{
byte = value & 0x1F;
if (negative)
byte |= 0x20;
Stream_Write_UINT8(s, value);
}
else if (value <= 0x1FFF)
{
byte = (value >> 8) & 0x1F;
if (negative)
byte |= 0x20;
Stream_Write_UINT8(s, byte | 0x40);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFF)
{
byte = (value >> 16) & 0x1F;
if (negative)
byte |= 0x20;
Stream_Write_UINT8(s, byte | 0x80);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFF)
{
byte = (value >> 24) & 0x1F;
if (negative)
byte |= 0x20;
Stream_Write_UINT8(s, byte | 0xC0);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else
{
return FALSE;
}
return TRUE;
}
BOOL rdpei_read_8byte_unsigned(wStream* s, UINT64* value)
{
BYTE byte;
BYTE count;
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, byte);
count = (byte & 0xE0) >> 5;
if (Stream_GetRemainingLength(s) < count)
return FALSE;
switch (count)
{
case 0:
*value = (byte & 0x1F);
break;
case 1:
*value = (byte & 0x1F) << 8;
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 2:
*value = (byte & 0x1F) << 16;
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 3:
*value = (byte & 0x1F) << 24;
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 4:
*value = ((UINT64) (byte & 0x1F)) << 32;
Stream_Read_UINT8(s, byte);
*value |= (byte << 24);
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 5:
*value = ((UINT64) (byte & 0x1F)) << 40;
Stream_Read_UINT8(s, byte);
*value |= (((UINT64) byte) << 32);
Stream_Read_UINT8(s, byte);
*value |= (byte << 24);
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 6:
*value = ((UINT64) (byte & 0x1F)) << 48;
Stream_Read_UINT8(s, byte);
*value |= (((UINT64) byte) << 40);
Stream_Read_UINT8(s, byte);
*value |= (((UINT64) byte) << 32);
Stream_Read_UINT8(s, byte);
*value |= (byte << 24);
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
case 7:
*value = ((UINT64) (byte & 0x1F)) << 56;
Stream_Read_UINT8(s, byte);
*value |= (((UINT64) byte) << 48);
Stream_Read_UINT8(s, byte);
*value |= (((UINT64) byte) << 40);
Stream_Read_UINT8(s, byte);
*value |= (((UINT64) byte) << 32);
Stream_Read_UINT8(s, byte);
*value |= (byte << 24);
Stream_Read_UINT8(s, byte);
*value |= (byte << 16);
Stream_Read_UINT8(s, byte);
*value |= (byte << 8);
Stream_Read_UINT8(s, byte);
*value |= byte;
break;
default:
break;
}
return TRUE;
}
BOOL rdpei_write_8byte_unsigned(wStream* s, UINT64 value)
{
BYTE byte;
if (value <= 0x1F)
{
byte = value & 0x1F;
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFF)
{
byte = (value >> 8) & 0x1F;
byte |= (1 << 5);
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFF)
{
byte = (value >> 16) & 0x1F;
byte |= (2 << 5);
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFF)
{
byte = (value >> 24) & 0x1F;
byte |= (3 << 5);
Stream_Write_UINT8(s, byte);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFFFF)
{
byte = (value >> 32) & 0x1F;
byte |= (4 << 5);
Stream_Write_UINT8(s, byte);
byte = (value >> 24) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFFFFFF)
{
byte = (value >> 40) & 0x1F;
byte |= (5 << 5);
Stream_Write_UINT8(s, byte);
byte = (value >> 32) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 24) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFFFFFFFF)
{
byte = (value >> 48) & 0x1F;
byte |= (6 << 5);
Stream_Write_UINT8(s, byte);
byte = (value >> 40) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 32) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 24) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else if (value <= 0x1FFFFFFFFFFFFF)
{
byte = (value >> 56) & 0x1F;
byte |= (7 << 5);
Stream_Write_UINT8(s, byte);
byte = (value >> 48) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 40) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 32) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 24) & 0x1F;
Stream_Write_UINT8(s, byte);
byte = (value >> 16) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value >> 8) & 0xFF;
Stream_Write_UINT8(s, byte);
byte = (value & 0xFF);
Stream_Write_UINT8(s, byte);
}
else
{
return FALSE;
}
return TRUE;
}
void touch_event_reset(RDPINPUT_TOUCH_EVENT *event)
{
int i;
for (i = 0; i < event->frameCount; i++)
touch_frame_reset(&event->frames[i]);
free(event->frames);
event->frames = NULL;
event->frameCount = 0;
}
void touch_frame_reset(RDPINPUT_TOUCH_FRAME *frame)
{
free(frame->contacts);
frame->contacts = NULL;
frame->contactCount = 0;
}
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