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libfreerdp-core: started ASN.1 BER encoder

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This commit is contained in:
Marc-André Moreau 2011-07-03 22:47:35 -04:00
parent 27bca27636
commit 1629b27149
5 changed files with 163 additions and 0 deletions
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4
libfreerdp-core/CMakeLists.txt
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@ -24,6 +24,10 @@ add_definitions(-DL_ENDIAN=1)
add_definitions(-DEXT_PATH="/usr/lib/freerdp/extensions")
set(LIBFREERDP_CORE_SRCS
ber.c
ber.h
mcs.c
mcs.h
nego.c
nego.h
# credssp.c

49
libfreerdp-core/ber.c Normal file
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@ -0,0 +1,49 @@
/**
* FreeRDP: A Remote Desktop Protocol Client
* ASN.1 Basic Encoding Rules (BER)
*
* 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.
*/
#include "ber.h"
void
ber_write_length(STREAM* s, int length)
{
if (length > 0xFF)
{
stream_write_uint8(s, 0x82);
stream_write_uint16_be(s, length);
}
else
{
stream_write_uint8(s, length);
}
}
void
ber_write_universal_tag(STREAM* s, uint8 tag, int length)
{
stream_write_uint8(s, (BER_CLASS_UNIV | BER_PRIMITIVE) & (BER_TAG_MASK & tag));
ber_write_length(s, length);
}
void
ber_write_application_tag(STREAM* s, uint8 tag, int length)
{
stream_write_uint8(s, (BER_CLASS_APPL | BER_CONSTRUCT) & BER_TAG_MASK);
stream_write_uint8(s, tag);
ber_write_length(s, length);
}

52
libfreerdp-core/ber.h Normal file
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@ -0,0 +1,52 @@
/**
* FreeRDP: A Remote Desktop Protocol Client
* ASN.1 Basic Encoding Rules (BER)
*
* 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.
*/
#ifndef __BER_H
#define __BER_H
#include <freerdp/utils/stream.h>
/* BER type */
/* Class - bits 8 and 7 */
#define BER_CLASS_MASK 0xC0
#define BER_CLASS_UNIV 0x00 /* 0 0 */
#define BER_CLASS_APPL 0x40 /* 0 1 */
#define BER_CLASS_CTXT 0x80 /* 1 0 */
#define BER_CLASS_PRIV 0xC0 /* 1 1 */
/* P/C - bit 6 */
#define BER_PC_MASK 0x20
#define BER_PRIMITIVE 0x00 /* 0 */
#define BER_CONSTRUCT 0x20 /* 1 */
/* Tag - bits 5 to 1 */
#define BER_TAG_MASK 0x1F
#define BER_TAG_BOOLEAN 0x01
#define BER_TAG_INTEGER 0x02
#define BER_TAG_OCTET_STRING 0x04
void
ber_write_length(STREAM* s, int length);
void
ber_write_universal_tag(STREAM* s, uint8 tag, int length);
void
ber_write_application_tag(STREAM* s, uint8 tag, int length);
#endif /* __BER_H */

28
libfreerdp-core/mcs.c Normal file
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@ -0,0 +1,28 @@
/**
* FreeRDP: A Remote Desktop Protocol Client
* T.125 Multipoint Communication Service (MCS) Protocol
*
* 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.
*/
#include "mcs.h"
/**
* T.125 MCS is defined in:
*
* http://www.itu.int/rec/T-REC-T.125-199802-I/
* ITU-T T.125 Multipoint Communication Service Protocol Specification
*/

30
libfreerdp-core/mcs.h Normal file
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@ -0,0 +1,30 @@
/**
* FreeRDP: A Remote Desktop Protocol Client
* T.125 Multipoint Communication Service (MCS) Protocol
*
* 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.
*/
#ifndef __MCS_H
#define __MCS_H
#include "ber.h"
#include <freerdp/utils/stream.h>
#define MCS_BER_CONNECT_INITIAL 0x65
#define MCS_BER_CONNECT_RESPONSE 0x66
#endif /* __MCS_H */