mirror of https://github.com/neutrinolabs/xrdp
2267 lines
68 KiB
C
2267 lines
68 KiB
C
/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Jay Sorg 2004-2014
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* secure layer
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*/
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#include "libxrdp.h"
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#include "log.h"
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#define LOG_LEVEL 1
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#define LLOG(_level, _args) \
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do { if (_level < LOG_LEVEL) { g_write _args ; } } while (0)
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#define LLOGLN(_level, _args) \
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do { if (_level < LOG_LEVEL) { g_writeln _args ; } } while (0)
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#define LHEXDUMP(_level, _args) \
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do { if (_level < LOG_LEVEL) { g_hexdump _args ; } } while (0)
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/* some compilers need unsigned char to avoid warnings */
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static tui8 g_pad_54[40] =
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{
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54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,
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54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,
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54, 54, 54, 54, 54, 54, 54, 54
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};
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/* some compilers need unsigned char to avoid warnings */
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static tui8 g_pad_92[48] =
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{
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92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92,
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92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92,
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92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92
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};
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/* some compilers need unsigned char to avoid warnings */
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static tui8 g_lic1[322] =
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{
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0x80, 0x00, 0x3e, 0x01, 0x01, 0x02, 0x3e, 0x01,
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0x7b, 0x3c, 0x31, 0xa6, 0xae, 0xe8, 0x74, 0xf6,
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|
0xb4, 0xa5, 0x03, 0x90, 0xe7, 0xc2, 0xc7, 0x39,
|
|
0xba, 0x53, 0x1c, 0x30, 0x54, 0x6e, 0x90, 0x05,
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|
0xd0, 0x05, 0xce, 0x44, 0x18, 0x91, 0x83, 0x81,
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|
0x00, 0x00, 0x04, 0x00, 0x2c, 0x00, 0x00, 0x00,
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|
0x4d, 0x00, 0x69, 0x00, 0x63, 0x00, 0x72, 0x00,
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|
0x6f, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x66, 0x00,
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|
0x74, 0x00, 0x20, 0x00, 0x43, 0x00, 0x6f, 0x00,
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0x72, 0x00, 0x70, 0x00, 0x6f, 0x00, 0x72, 0x00,
|
|
0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x6f, 0x00,
|
|
0x6e, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
|
|
0x32, 0x00, 0x33, 0x00, 0x36, 0x00, 0x00, 0x00,
|
|
0x0d, 0x00, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
0x03, 0x00, 0xb8, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
0x06, 0x00, 0x5c, 0x00, 0x52, 0x53, 0x41, 0x31,
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|
0x48, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
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|
0x3f, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00,
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|
0x01, 0xc7, 0xc9, 0xf7, 0x8e, 0x5a, 0x38, 0xe4,
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0x29, 0xc3, 0x00, 0x95, 0x2d, 0xdd, 0x4c, 0x3e,
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0x50, 0x45, 0x0b, 0x0d, 0x9e, 0x2a, 0x5d, 0x18,
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0x63, 0x64, 0xc4, 0x2c, 0xf7, 0x8f, 0x29, 0xd5,
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0x3f, 0xc5, 0x35, 0x22, 0x34, 0xff, 0xad, 0x3a,
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0xe6, 0xe3, 0x95, 0x06, 0xae, 0x55, 0x82, 0xe3,
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0xc8, 0xc7, 0xb4, 0xa8, 0x47, 0xc8, 0x50, 0x71,
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0x74, 0x29, 0x53, 0x89, 0x6d, 0x9c, 0xed, 0x70,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x08, 0x00, 0x48, 0x00, 0xa8, 0xf4, 0x31, 0xb9,
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0xab, 0x4b, 0xe6, 0xb4, 0xf4, 0x39, 0x89, 0xd6,
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0xb1, 0xda, 0xf6, 0x1e, 0xec, 0xb1, 0xf0, 0x54,
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0x3b, 0x5e, 0x3e, 0x6a, 0x71, 0xb4, 0xf7, 0x75,
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0xc8, 0x16, 0x2f, 0x24, 0x00, 0xde, 0xe9, 0x82,
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0x99, 0x5f, 0x33, 0x0b, 0xa9, 0xa6, 0x94, 0xaf,
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0xcb, 0x11, 0xc3, 0xf2, 0xdb, 0x09, 0x42, 0x68,
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0x29, 0x56, 0x58, 0x01, 0x56, 0xdb, 0x59, 0x03,
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0x69, 0xdb, 0x7d, 0x37, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
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0x0e, 0x00, 0x0e, 0x00, 0x6d, 0x69, 0x63, 0x72,
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0x6f, 0x73, 0x6f, 0x66, 0x74, 0x2e, 0x63, 0x6f,
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0x6d, 0x00
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};
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/* some compilers need unsigned char to avoid warnings */
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static tui8 g_lic2[20] =
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{
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0x80, 0x00, 0x10, 0x00, 0xff, 0x02, 0x10, 0x00,
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0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
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0x28, 0x14, 0x00, 0x00
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};
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/* mce */
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/* some compilers need unsigned char to avoid warnings */
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static tui8 g_lic3[20] =
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{
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0x80, 0x02, 0x10, 0x00, 0xff, 0x03, 0x10, 0x00,
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0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
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0xf3, 0x99, 0x00, 0x00
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};
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static const tui8 g_fips_reverse_table[256] =
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{
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0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
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0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
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0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
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0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
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0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
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0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
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0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
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0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
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0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
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0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
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0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
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0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
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0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
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0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
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0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
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0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
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0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
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0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
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0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
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0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
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0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
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0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
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0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
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0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
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0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
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0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
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0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
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0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
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0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
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0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
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0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
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0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
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};
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static const tui8 g_fips_oddparity_table[256] =
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{
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0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07,
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0x08, 0x08, 0x0b, 0x0b, 0x0d, 0x0d, 0x0e, 0x0e,
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0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16,
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0x19, 0x19, 0x1a, 0x1a, 0x1c, 0x1c, 0x1f, 0x1f,
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0x20, 0x20, 0x23, 0x23, 0x25, 0x25, 0x26, 0x26,
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0x29, 0x29, 0x2a, 0x2a, 0x2c, 0x2c, 0x2f, 0x2f,
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0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37,
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0x38, 0x38, 0x3b, 0x3b, 0x3d, 0x3d, 0x3e, 0x3e,
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0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46,
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0x49, 0x49, 0x4a, 0x4a, 0x4c, 0x4c, 0x4f, 0x4f,
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0x51, 0x51, 0x52, 0x52, 0x54, 0x54, 0x57, 0x57,
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0x58, 0x58, 0x5b, 0x5b, 0x5d, 0x5d, 0x5e, 0x5e,
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0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67,
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0x68, 0x68, 0x6b, 0x6b, 0x6d, 0x6d, 0x6e, 0x6e,
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0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76,
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0x79, 0x79, 0x7a, 0x7a, 0x7c, 0x7c, 0x7f, 0x7f,
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0x80, 0x80, 0x83, 0x83, 0x85, 0x85, 0x86, 0x86,
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0x89, 0x89, 0x8a, 0x8a, 0x8c, 0x8c, 0x8f, 0x8f,
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0x91, 0x91, 0x92, 0x92, 0x94, 0x94, 0x97, 0x97,
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0x98, 0x98, 0x9b, 0x9b, 0x9d, 0x9d, 0x9e, 0x9e,
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0xa1, 0xa1, 0xa2, 0xa2, 0xa4, 0xa4, 0xa7, 0xa7,
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0xa8, 0xa8, 0xab, 0xab, 0xad, 0xad, 0xae, 0xae,
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0xb0, 0xb0, 0xb3, 0xb3, 0xb5, 0xb5, 0xb6, 0xb6,
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0xb9, 0xb9, 0xba, 0xba, 0xbc, 0xbc, 0xbf, 0xbf,
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0xc1, 0xc1, 0xc2, 0xc2, 0xc4, 0xc4, 0xc7, 0xc7,
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0xc8, 0xc8, 0xcb, 0xcb, 0xcd, 0xcd, 0xce, 0xce,
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0xd0, 0xd0, 0xd3, 0xd3, 0xd5, 0xd5, 0xd6, 0xd6,
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0xd9, 0xd9, 0xda, 0xda, 0xdc, 0xdc, 0xdf, 0xdf,
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0xe0, 0xe0, 0xe3, 0xe3, 0xe5, 0xe5, 0xe6, 0xe6,
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0xe9, 0xe9, 0xea, 0xea, 0xec, 0xec, 0xef, 0xef,
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0xf1, 0xf1, 0xf2, 0xf2, 0xf4, 0xf4, 0xf7, 0xf7,
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0xf8, 0xf8, 0xfb, 0xfb, 0xfd, 0xfd, 0xfe, 0xfe
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};
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static const tui8 g_fips_ivec[8] =
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{
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0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF
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};
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/*****************************************************************************/
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static void APP_CC
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hex_str_to_bin(char *in, char *out, int out_len)
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{
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int in_index;
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int in_len;
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int out_index;
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int val;
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char hex[16];
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in_len = g_strlen(in);
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out_index = 0;
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in_index = 0;
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while (in_index <= (in_len - 4))
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{
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if ((in[in_index] == '0') && (in[in_index + 1] == 'x'))
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{
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hex[0] = in[in_index + 2];
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hex[1] = in[in_index + 3];
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hex[2] = 0;
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if (out_index < out_len)
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{
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val = g_htoi(hex);
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out[out_index] = val;
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}
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out_index++;
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}
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in_index++;
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}
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}
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/*****************************************************************************/
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static void APP_CC
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xrdp_load_keyboard_layout(struct xrdp_client_info *client_info)
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{
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int fd;
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int index = 0;
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int bytes;
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struct list *names = (struct list *)NULL;
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struct list *items = (struct list *)NULL;
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struct list *values = (struct list *)NULL;
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char *item = (char *)NULL;
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char *value = (char *)NULL;
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char *q = (char *)NULL;
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char keyboard_cfg_file[256] = { 0 };
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char rdp_layout[256] = { 0 };
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LLOGLN(0, ("xrdp_load_keyboard_layout:"));
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/* infer model/variant */
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/* TODO specify different X11 keyboard models/variants */
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g_memset(client_info->model, 0, sizeof(client_info->model));
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g_memset(client_info->variant, 0, sizeof(client_info->variant));
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g_strncpy(client_info->layout, "us", sizeof(client_info->layout) - 1);
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if (client_info->keyboard_subtype == 3)
|
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{
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/* macintosh keyboard */
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bytes = sizeof(client_info->variant);
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g_strncpy(client_info->variant, "mac", bytes - 1);
|
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}
|
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else if (client_info->keyboard_subtype == 0)
|
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{
|
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/* default - standard subtype */
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client_info->keyboard_subtype = 1;
|
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}
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|
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g_snprintf(keyboard_cfg_file, 255, "%s/xrdp_keyboard.ini", XRDP_CFG_PATH);
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LLOGLN(10, ("keyboard_cfg_file %s", keyboard_cfg_file));
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|
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fd = g_file_open(keyboard_cfg_file);
|
|
|
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if (fd > 0)
|
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{
|
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int section_found = -1;
|
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char section_rdp_layouts[256] = { 0 };
|
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char section_layouts_map[256] = { 0 };
|
|
|
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names = list_create();
|
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names->auto_free = 1;
|
|
items = list_create();
|
|
items->auto_free = 1;
|
|
values = list_create();
|
|
values->auto_free = 1;
|
|
|
|
file_read_sections(fd, names);
|
|
for (index = 0; index < names->count; index++)
|
|
{
|
|
q = (char *)list_get_item(names, index);
|
|
if (g_strncasecmp("default", q, 8) != 0)
|
|
{
|
|
int i;
|
|
|
|
file_read_section(fd, q, items, values);
|
|
|
|
for (i = 0; i < items->count; i++)
|
|
{
|
|
item = (char *)list_get_item(items, i);
|
|
value = (char *)list_get_item(values, i);
|
|
LLOGLN(10, ("xrdp_load_keyboard_layout: item %s value %s",
|
|
item, value));
|
|
if (g_strcasecmp(item, "keyboard_type") == 0)
|
|
{
|
|
int v = g_atoi(value);
|
|
if (v == client_info->keyboard_type)
|
|
{
|
|
section_found = index;
|
|
}
|
|
}
|
|
else if (g_strcasecmp(item, "keyboard_subtype") == 0)
|
|
{
|
|
int v = g_atoi(value);
|
|
if (v != client_info->keyboard_subtype &&
|
|
section_found == index)
|
|
{
|
|
section_found = -1;
|
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break;
|
|
}
|
|
}
|
|
else if (g_strcasecmp(item, "rdp_layouts") == 0)
|
|
{
|
|
if (section_found != -1 && section_found == index)
|
|
{
|
|
g_strncpy(section_rdp_layouts, value, 255);
|
|
}
|
|
}
|
|
else if (g_strcasecmp(item, "layouts_map") == 0)
|
|
{
|
|
if (section_found != -1 && section_found == index)
|
|
{
|
|
g_strncpy(section_layouts_map, value, 255);
|
|
}
|
|
}
|
|
else if (g_strcasecmp(item, "model") == 0)
|
|
{
|
|
if (section_found != -1 && section_found == index)
|
|
{
|
|
bytes = sizeof(client_info->model);
|
|
g_memset(client_info->model, 0, bytes);
|
|
g_strncpy(client_info->model, value, bytes - 1);
|
|
}
|
|
}
|
|
else if (g_strcasecmp(item, "variant") == 0)
|
|
{
|
|
if (section_found != -1 && section_found == index)
|
|
{
|
|
bytes = sizeof(client_info->variant);
|
|
g_memset(client_info->variant, 0, bytes);
|
|
g_strncpy(client_info->variant, value, bytes - 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* mixing items from different sections will result in
|
|
* skipping over current section.
|
|
*/
|
|
LLOGLN(10, ("xrdp_load_keyboard_layout: skipping "
|
|
"configuration item - %s, continuing to next "
|
|
"section", item));
|
|
break;
|
|
}
|
|
}
|
|
|
|
list_clear(items);
|
|
list_clear(values);
|
|
}
|
|
}
|
|
|
|
if (section_found == -1)
|
|
{
|
|
g_memset(section_rdp_layouts, 0, sizeof(char) * 256);
|
|
g_memset(section_layouts_map, 0, sizeof(char) * 256);
|
|
// read default section
|
|
file_read_section(fd, "default", items, values);
|
|
for (index = 0; index < items->count; index++)
|
|
{
|
|
item = (char *)list_get_item(items, index);
|
|
value = (char *)list_get_item(values, index);
|
|
if (g_strcasecmp(item, "rdp_layouts") == 0)
|
|
{
|
|
g_strncpy(section_rdp_layouts, value, 255);
|
|
}
|
|
else if (g_strcasecmp(item, "layouts_map") == 0)
|
|
{
|
|
g_strncpy(section_layouts_map, value, 255);
|
|
}
|
|
}
|
|
list_clear(items);
|
|
list_clear(values);
|
|
}
|
|
|
|
/* load the map */
|
|
file_read_section(fd, section_rdp_layouts, items, values);
|
|
for (index = 0; index < items->count; index++)
|
|
{
|
|
int rdp_layout_id;
|
|
item = (char *)list_get_item(items, index);
|
|
value = (char *)list_get_item(values, index);
|
|
rdp_layout_id = g_htoi(value);
|
|
if (rdp_layout_id == client_info->keylayout)
|
|
{
|
|
g_strncpy(rdp_layout, item, 255);
|
|
break;
|
|
}
|
|
}
|
|
list_clear(items);
|
|
list_clear(values);
|
|
file_read_section(fd, section_layouts_map, items, values);
|
|
for (index = 0; index < items->count; index++)
|
|
{
|
|
item = (char *)list_get_item(items, index);
|
|
value = (char *)list_get_item(values, index);
|
|
if (g_strcasecmp(item, rdp_layout) == 0)
|
|
{
|
|
bytes = sizeof(client_info->layout);
|
|
g_strncpy(client_info->layout, value, bytes - 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
list_delete(names);
|
|
list_delete(items);
|
|
list_delete(values);
|
|
|
|
LLOGLN(0, ("xrdp_load_keyboard_layout: model [%s] variant [%s] "
|
|
"layout [%s]", client_info->model, client_info->variant,
|
|
client_info->layout));
|
|
g_file_close(fd);
|
|
}
|
|
else
|
|
{
|
|
LLOGLN(0, ("xrdp_load_keyboard_layout: error opening %d",
|
|
keyboard_cfg_file));
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
struct xrdp_sec *APP_CC
|
|
xrdp_sec_create(struct xrdp_rdp *owner, struct trans *trans)
|
|
{
|
|
struct xrdp_sec *self;
|
|
|
|
DEBUG((" in xrdp_sec_create"));
|
|
self = (struct xrdp_sec *) g_malloc(sizeof(struct xrdp_sec), 1);
|
|
self->rdp_layer = owner;
|
|
self->crypt_method = CRYPT_METHOD_NONE; /* set later */
|
|
self->crypt_level = CRYPT_LEVEL_NONE;
|
|
self->mcs_layer = xrdp_mcs_create(self, trans, &(self->client_mcs_data),
|
|
&(self->server_mcs_data));
|
|
self->fastpath_layer = xrdp_fastpath_create(self, trans);
|
|
self->chan_layer = xrdp_channel_create(self, self->mcs_layer);
|
|
self->is_security_header_present = 1;
|
|
DEBUG((" out xrdp_sec_create"));
|
|
|
|
return self;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
void APP_CC
|
|
xrdp_sec_delete(struct xrdp_sec *self)
|
|
{
|
|
if (self == 0)
|
|
{
|
|
g_writeln("xrdp_sec_delete: self is null");
|
|
return;
|
|
}
|
|
|
|
xrdp_channel_delete(self->chan_layer);
|
|
xrdp_mcs_delete(self->mcs_layer);
|
|
xrdp_fastpath_delete(self->fastpath_layer);
|
|
ssl_rc4_info_delete(self->decrypt_rc4_info); /* TODO clear all data */
|
|
ssl_rc4_info_delete(self->encrypt_rc4_info); /* TODO clear all data */
|
|
ssl_des3_info_delete(self->decrypt_fips_info);
|
|
ssl_des3_info_delete(self->encrypt_fips_info);
|
|
ssl_hmac_info_delete(self->sign_fips_info);
|
|
g_free(self->client_mcs_data.data);
|
|
g_free(self->server_mcs_data.data);
|
|
/* Crypto information must always be cleared */
|
|
g_memset(self, 0, sizeof(struct xrdp_sec));
|
|
g_free(self);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_sec_init(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
if (xrdp_mcs_init(self->mcs_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
s_push_layer(s, sec_hdr, 4 + 4 + 8);
|
|
}
|
|
else if (self->crypt_level > CRYPT_LEVEL_LOW)
|
|
{
|
|
s_push_layer(s, sec_hdr, 4 + 8);
|
|
}
|
|
else
|
|
{
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Reduce key entropy from 64 to 40 bits */
|
|
static void APP_CC
|
|
xrdp_sec_make_40bit(char *key)
|
|
{
|
|
key[0] = 0xd1;
|
|
key[1] = 0x26;
|
|
key[2] = 0x9e;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
/* update an encryption key */
|
|
static int APP_CC
|
|
xrdp_sec_update(char *key, char *update_key, int key_len)
|
|
{
|
|
char shasig[20];
|
|
void *sha1_info;
|
|
void *md5_info;
|
|
void *rc4_info;
|
|
|
|
sha1_info = ssl_sha1_info_create();
|
|
md5_info = ssl_md5_info_create();
|
|
rc4_info = ssl_rc4_info_create();
|
|
ssl_sha1_clear(sha1_info);
|
|
ssl_sha1_transform(sha1_info, update_key, key_len);
|
|
ssl_sha1_transform(sha1_info, (char *)g_pad_54, 40);
|
|
ssl_sha1_transform(sha1_info, key, key_len);
|
|
ssl_sha1_complete(sha1_info, shasig);
|
|
ssl_md5_clear(md5_info);
|
|
ssl_md5_transform(md5_info, update_key, key_len);
|
|
ssl_md5_transform(md5_info, (char *)g_pad_92, 48);
|
|
ssl_md5_transform(md5_info, shasig, 20);
|
|
ssl_md5_complete(md5_info, key);
|
|
ssl_rc4_set_key(rc4_info, key, key_len);
|
|
ssl_rc4_crypt(rc4_info, key, key_len);
|
|
|
|
if (key_len == 8)
|
|
{
|
|
xrdp_sec_make_40bit(key);
|
|
}
|
|
|
|
ssl_sha1_info_delete(sha1_info);
|
|
ssl_md5_info_delete(md5_info);
|
|
ssl_rc4_info_delete(rc4_info);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_fips_decrypt(struct xrdp_sec *self, char *data, int len)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_fips_decrypt:"));
|
|
ssl_des3_decrypt(self->decrypt_fips_info, len, data, data);
|
|
self->decrypt_use_count++;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_decrypt(struct xrdp_sec *self, char *data, int len)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_decrypt:"));
|
|
if (self->decrypt_use_count == 4096)
|
|
{
|
|
xrdp_sec_update(self->decrypt_key, self->decrypt_update_key,
|
|
self->rc4_key_len);
|
|
ssl_rc4_set_key(self->decrypt_rc4_info, self->decrypt_key,
|
|
self->rc4_key_len);
|
|
self->decrypt_use_count = 0;
|
|
}
|
|
ssl_rc4_crypt(self->decrypt_rc4_info, data, len);
|
|
self->decrypt_use_count++;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_fips_encrypt(struct xrdp_sec *self, char *data, int len)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_fips_encrypt:"));
|
|
ssl_des3_encrypt(self->encrypt_fips_info, len, data, data);
|
|
self->encrypt_use_count++;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_encrypt(struct xrdp_sec *self, char *data, int len)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_encrypt:"));
|
|
if (self->encrypt_use_count == 4096)
|
|
{
|
|
xrdp_sec_update(self->encrypt_key, self->encrypt_update_key,
|
|
self->rc4_key_len);
|
|
ssl_rc4_set_key(self->encrypt_rc4_info, self->encrypt_key,
|
|
self->rc4_key_len);
|
|
self->encrypt_use_count = 0;
|
|
}
|
|
|
|
ssl_rc4_crypt(self->encrypt_rc4_info, data, len);
|
|
self->encrypt_use_count++;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static int APP_CC
|
|
unicode_in(struct stream *s, int uni_len, char *dst, int dst_len)
|
|
{
|
|
int dst_index;
|
|
int src_index;
|
|
|
|
dst_index = 0;
|
|
src_index = 0;
|
|
|
|
while (src_index < uni_len)
|
|
{
|
|
if (dst_index >= dst_len || src_index > 512)
|
|
{
|
|
break;
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, dst[dst_index]);
|
|
in_uint8s(s, 1);
|
|
dst_index++;
|
|
src_index += 2;
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 2);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_sec_process_logon_info(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
int flags = 0;
|
|
int len_domain = 0;
|
|
int len_user = 0;
|
|
int len_password = 0;
|
|
int len_program = 0;
|
|
int len_directory = 0;
|
|
int len_ip = 0;
|
|
int len_dll = 0;
|
|
int tzone = 0;
|
|
char tmpdata[256];
|
|
|
|
/* initialize (zero out) local variables */
|
|
g_memset(tmpdata, 0, sizeof(char) * 256);
|
|
if (!s_check_rem(s, 8))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 4);
|
|
in_uint32_le(s, flags);
|
|
DEBUG(("in xrdp_sec_process_logon_info flags $%x", flags));
|
|
|
|
/* this is the first test that the decrypt is working */
|
|
if ((flags & RDP_LOGON_NORMAL) != RDP_LOGON_NORMAL) /* 0x33 */
|
|
{
|
|
/* must be or error */
|
|
DEBUG(("xrdp_sec_process_logon_info: flags wrong, major error"));
|
|
LLOGLN(0, ("xrdp_sec_process_logon_info: flags wrong, likely decrypt "
|
|
"not working"));
|
|
return 1;
|
|
}
|
|
|
|
if (flags & RDP_LOGON_LEAVE_AUDIO)
|
|
{
|
|
self->rdp_layer->client_info.sound_code = 1;
|
|
DEBUG(("flag RDP_LOGON_LEAVE_AUDIO found"));
|
|
}
|
|
|
|
if ((flags & RDP_LOGON_AUTO) && (!self->rdp_layer->client_info.is_mce))
|
|
/* todo, for now not allowing autologon and mce both */
|
|
{
|
|
self->rdp_layer->client_info.rdp_autologin = 1;
|
|
DEBUG(("flag RDP_LOGON_AUTO found"));
|
|
}
|
|
|
|
if (flags & RDP_COMPRESSION)
|
|
{
|
|
DEBUG(("flag RDP_COMPRESSION found"));
|
|
if (self->rdp_layer->client_info.use_bulk_comp)
|
|
{
|
|
DEBUG(("flag RDP_COMPRESSION set"));
|
|
self->rdp_layer->client_info.rdp_compression = 1;
|
|
}
|
|
else
|
|
{
|
|
DEBUG(("flag RDP_COMPRESSION not set"));
|
|
}
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len_domain);
|
|
|
|
if (len_domain > 511)
|
|
{
|
|
DEBUG(("ERROR [xrdp_sec_process_logon_info()]: len_domain > 511"));
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len_user);
|
|
|
|
/*
|
|
* Microsoft's itap client running on Mac OS/Android
|
|
* always sends autologon credentials, even when user has not
|
|
* configured any
|
|
*/
|
|
if (len_user == 0)
|
|
{
|
|
self->rdp_layer->client_info.rdp_autologin = 0;
|
|
}
|
|
|
|
if (len_user > 511)
|
|
{
|
|
DEBUG(("ERROR [xrdp_sec_process_logon_info()]: len_user > 511"));
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len_password);
|
|
|
|
if (len_password > 511)
|
|
{
|
|
DEBUG(("ERROR [xrdp_sec_process_logon_info()]: len_password > 511"));
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len_program);
|
|
|
|
if (len_program > 511)
|
|
{
|
|
DEBUG(("ERROR [xrdp_sec_process_logon_info()]: len_program > 511"));
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len_directory);
|
|
|
|
if (len_directory > 511)
|
|
{
|
|
DEBUG(("ERROR [xrdp_sec_process_logon_info()]: len_directory > 511"));
|
|
return 1;
|
|
}
|
|
|
|
if (unicode_in(s, len_domain, self->rdp_layer->client_info.domain, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
DEBUG(("domain %s", self->rdp_layer->client_info.domain));
|
|
if (unicode_in(s, len_user, self->rdp_layer->client_info.username, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
DEBUG(("username %s", self->rdp_layer->client_info.username));
|
|
|
|
if (flags & RDP_LOGON_AUTO)
|
|
{
|
|
if (unicode_in(s, len_password, self->rdp_layer->client_info.password, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
DEBUG(("flag RDP_LOGON_AUTO found"));
|
|
}
|
|
else
|
|
{
|
|
if (!s_check_rem(s, len_password + 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, len_password + 2);
|
|
if (self->rdp_layer->client_info.require_credentials)
|
|
{
|
|
g_writeln("xrdp_sec_process_logon_info: credentials on cmd line is mandatory");
|
|
return 1; /* credentials on cmd line is mandatory */
|
|
}
|
|
}
|
|
|
|
if (unicode_in(s, len_program, self->rdp_layer->client_info.program, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
DEBUG(("program %s", self->rdp_layer->client_info.program));
|
|
if (unicode_in(s, len_directory, self->rdp_layer->client_info.directory, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
DEBUG(("directory %s", self->rdp_layer->client_info.directory));
|
|
|
|
if (flags & RDP_LOGON_BLOB)
|
|
{
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 2); /* unknown */
|
|
in_uint16_le(s, len_ip);
|
|
if (unicode_in(s, len_ip - 2, tmpdata, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len_dll);
|
|
if (unicode_in(s, len_dll - 2, tmpdata, 255) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
if (!s_check_rem(s, 4 + 62 + 22 + 62 + 26 + 4))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint32_le(s, tzone); /* len of timezone */
|
|
in_uint8s(s, 62); /* skip */
|
|
in_uint8s(s, 22); /* skip misc. */
|
|
in_uint8s(s, 62); /* skip */
|
|
in_uint8s(s, 26); /* skip stuff */
|
|
in_uint32_le(s, self->rdp_layer->client_info.rdp5_performanceflags);
|
|
}
|
|
|
|
DEBUG(("out xrdp_sec_process_logon_info"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_sec_send_lic_initial(struct xrdp_sec *self)
|
|
{
|
|
struct stream *s;
|
|
|
|
LLOGLN(10, ("xrdp_sec_send_lic_initial:"));
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
|
|
if (xrdp_mcs_init(self->mcs_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
return 1;
|
|
}
|
|
|
|
out_uint8a(s, g_lic1, 322);
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_mcs_send(self->mcs_layer, s, MCS_GLOBAL_CHANNEL) != 0)
|
|
{
|
|
free_stream(s);
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_sec_send_lic_response(struct xrdp_sec *self)
|
|
{
|
|
struct stream *s;
|
|
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
|
|
if (xrdp_mcs_init(self->mcs_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
return 1;
|
|
}
|
|
|
|
out_uint8a(s, g_lic2, 20);
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_mcs_send(self->mcs_layer, s, MCS_GLOBAL_CHANNEL) != 0)
|
|
{
|
|
free_stream(s);
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_sec_send_media_lic_response(struct xrdp_sec *self)
|
|
{
|
|
struct stream *s;
|
|
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
|
|
if (xrdp_mcs_init(self->mcs_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
return 1;
|
|
}
|
|
|
|
out_uint8a(s, g_lic3, sizeof(g_lic3));
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_mcs_send(self->mcs_layer, s, MCS_GLOBAL_CHANNEL) != 0)
|
|
{
|
|
free_stream(s);
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_rsa_op(struct xrdp_sec *self, char *out, char *in, int in_bytes,
|
|
char *mod, char *exp)
|
|
{
|
|
ssl_mod_exp(out, self->rsa_key_bytes, in, in_bytes,
|
|
mod, self->rsa_key_bytes,
|
|
exp, self->rsa_key_bytes);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_hash_48(char *out, char *in, char *salt1, char *salt2, int salt)
|
|
{
|
|
int i;
|
|
void *sha1_info;
|
|
void *md5_info;
|
|
char pad[4];
|
|
char sha1_sig[20];
|
|
char md5_sig[16];
|
|
|
|
sha1_info = ssl_sha1_info_create();
|
|
md5_info = ssl_md5_info_create();
|
|
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
g_memset(pad, salt + i, 4);
|
|
ssl_sha1_clear(sha1_info);
|
|
ssl_sha1_transform(sha1_info, pad, i + 1);
|
|
ssl_sha1_transform(sha1_info, in, 48);
|
|
ssl_sha1_transform(sha1_info, salt1, 32);
|
|
ssl_sha1_transform(sha1_info, salt2, 32);
|
|
ssl_sha1_complete(sha1_info, sha1_sig);
|
|
ssl_md5_clear(md5_info);
|
|
ssl_md5_transform(md5_info, in, 48);
|
|
ssl_md5_transform(md5_info, sha1_sig, 20);
|
|
ssl_md5_complete(md5_info, md5_sig);
|
|
g_memcpy(out + i * 16, md5_sig, 16);
|
|
}
|
|
|
|
ssl_sha1_info_delete(sha1_info);
|
|
ssl_md5_info_delete(md5_info);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_hash_16(char *out, char *in, char *salt1, char *salt2)
|
|
{
|
|
void *md5_info;
|
|
|
|
md5_info = ssl_md5_info_create();
|
|
ssl_md5_clear(md5_info);
|
|
ssl_md5_transform(md5_info, in, 16);
|
|
ssl_md5_transform(md5_info, salt1, 32);
|
|
ssl_md5_transform(md5_info, salt2, 32);
|
|
ssl_md5_complete(md5_info, out);
|
|
ssl_md5_info_delete(md5_info);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static void APP_CC
|
|
fips_expand_key_bits(const char *in, char *out)
|
|
{
|
|
tui8 buf[32];
|
|
tui8 c;
|
|
int i;
|
|
int b;
|
|
int p;
|
|
int r;
|
|
|
|
/* reverse every byte in the key */
|
|
for (i = 0; i < 21; i++)
|
|
{
|
|
c = in[i];
|
|
buf[i] = g_fips_reverse_table[c];
|
|
}
|
|
/* insert a zero-bit after every 7th bit */
|
|
for (i = 0, b = 0; i < 24; i++, b += 7)
|
|
{
|
|
p = b / 8;
|
|
r = b % 8;
|
|
if (r == 0)
|
|
{
|
|
out[i] = buf[p] & 0xfe;
|
|
}
|
|
else
|
|
{
|
|
/* c is accumulator */
|
|
c = buf[p] << r;
|
|
c |= buf[p + 1] >> (8 - r);
|
|
out[i] = c & 0xfe;
|
|
}
|
|
}
|
|
/* reverse every byte */
|
|
/* alter lsb so the byte has odd parity */
|
|
for (i = 0; i < 24; i++)
|
|
{
|
|
c = out[i];
|
|
c = g_fips_reverse_table[c];
|
|
out[i] = g_fips_oddparity_table[c];
|
|
}
|
|
}
|
|
|
|
/****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_fips_establish_keys(struct xrdp_sec *self)
|
|
{
|
|
char server_encrypt_key[32];
|
|
char server_decrypt_key[32];
|
|
const char *fips_ivec;
|
|
void *sha1;
|
|
|
|
LLOGLN(0, ("xrdp_sec_fips_establish_keys:"));
|
|
|
|
sha1 = ssl_sha1_info_create();
|
|
ssl_sha1_clear(sha1);
|
|
ssl_sha1_transform(sha1, self->client_random + 16, 16);
|
|
ssl_sha1_transform(sha1, self->server_random + 16, 16);
|
|
ssl_sha1_complete(sha1, server_decrypt_key);
|
|
|
|
server_decrypt_key[20] = server_decrypt_key[0];
|
|
fips_expand_key_bits(server_decrypt_key, self->fips_decrypt_key);
|
|
ssl_sha1_info_delete(sha1);
|
|
|
|
sha1 = ssl_sha1_info_create();
|
|
ssl_sha1_clear(sha1);
|
|
ssl_sha1_transform(sha1, self->client_random, 16);
|
|
ssl_sha1_transform(sha1, self->server_random, 16);
|
|
ssl_sha1_complete(sha1, server_encrypt_key);
|
|
server_encrypt_key[20] = server_encrypt_key[0];
|
|
fips_expand_key_bits(server_encrypt_key, self->fips_encrypt_key);
|
|
ssl_sha1_info_delete(sha1);
|
|
|
|
sha1 = ssl_sha1_info_create();
|
|
ssl_sha1_clear(sha1);
|
|
ssl_sha1_transform(sha1, server_encrypt_key, 20);
|
|
ssl_sha1_transform(sha1, server_decrypt_key, 20);
|
|
ssl_sha1_complete(sha1, self->fips_sign_key);
|
|
ssl_sha1_info_delete(sha1);
|
|
|
|
fips_ivec = (const char *) g_fips_ivec;
|
|
self->encrypt_fips_info =
|
|
ssl_des3_encrypt_info_create(self->fips_encrypt_key, fips_ivec);
|
|
self->decrypt_fips_info =
|
|
ssl_des3_decrypt_info_create(self->fips_decrypt_key, fips_ivec);
|
|
self->sign_fips_info = ssl_hmac_info_create();
|
|
}
|
|
|
|
/****************************************************************************/
|
|
static void APP_CC
|
|
xrdp_sec_establish_keys(struct xrdp_sec *self)
|
|
{
|
|
char session_key[48];
|
|
char temp_hash[48];
|
|
char input[48];
|
|
|
|
LLOGLN(0, ("xrdp_sec_establish_keys:"));
|
|
|
|
g_memcpy(input, self->client_random, 24);
|
|
g_memcpy(input + 24, self->server_random, 24);
|
|
xrdp_sec_hash_48(temp_hash, input, self->client_random,
|
|
self->server_random, 65);
|
|
xrdp_sec_hash_48(session_key, temp_hash, self->client_random,
|
|
self->server_random, 88);
|
|
g_memcpy(self->sign_key, session_key, 16);
|
|
xrdp_sec_hash_16(self->encrypt_key, session_key + 16, self->client_random,
|
|
self->server_random);
|
|
xrdp_sec_hash_16(self->decrypt_key, session_key + 32, self->client_random,
|
|
self->server_random);
|
|
|
|
if (self->crypt_method == CRYPT_METHOD_40BIT)
|
|
{
|
|
xrdp_sec_make_40bit(self->sign_key);
|
|
xrdp_sec_make_40bit(self->encrypt_key);
|
|
xrdp_sec_make_40bit(self->decrypt_key);
|
|
self->rc4_key_len = 8;
|
|
}
|
|
else
|
|
{
|
|
self->rc4_key_len = 16;
|
|
}
|
|
|
|
g_memcpy(self->decrypt_update_key, self->decrypt_key, 16);
|
|
g_memcpy(self->encrypt_update_key, self->encrypt_key, 16);
|
|
ssl_rc4_set_key(self->decrypt_rc4_info, self->decrypt_key, self->rc4_key_len);
|
|
ssl_rc4_set_key(self->encrypt_rc4_info, self->encrypt_key, self->rc4_key_len);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_sec_recv_fastpath(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
int ver;
|
|
int len;
|
|
int pad;
|
|
|
|
LLOGLN(10, ("xrdp_sec_recv_fastpath:"));
|
|
if (xrdp_fastpath_recv(self->fastpath_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (self->fastpath_layer->secFlags & FASTPATH_INPUT_ENCRYPTED)
|
|
{
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
if (!s_check_rem(s, 12))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len);
|
|
in_uint8(s, ver); /* length (2 bytes) */
|
|
if (len != 0x10) /* length MUST set to 0x10 */
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, pad);
|
|
LLOGLN(10, ("xrdp_sec_recv_fastpath: len %d ver %d pad %d", len, ver, pad));
|
|
in_uint8s(s, 8); /* dataSignature (8 bytes), skip for now */
|
|
LLOGLN(10, ("xrdp_sec_recv_fastpath: data len %d", (int)(s->end - s->p)));
|
|
xrdp_sec_fips_decrypt(self, s->p, (int)(s->end - s->p));
|
|
s->end -= pad;
|
|
}
|
|
else
|
|
{
|
|
if (!s_check_rem(s, 8))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 8); /* dataSignature (8 bytes), skip for now */
|
|
xrdp_sec_decrypt(self, s->p, (int)(s->end - s->p));
|
|
}
|
|
}
|
|
|
|
if (self->fastpath_layer->numEvents == 0)
|
|
{
|
|
/**
|
|
* If numberEvents is not provided in fpInputHeader, it will be provided
|
|
* as one additional byte here.
|
|
*/
|
|
if (!s_check_rem(s, 8))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, self->fastpath_layer->numEvents); /* numEvents (1 byte) (optional) */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_sec_recv(struct xrdp_sec *self, struct stream *s, int *chan)
|
|
{
|
|
int flags;
|
|
int len;
|
|
int ver;
|
|
int pad;
|
|
|
|
DEBUG((" in xrdp_sec_recv"));
|
|
|
|
if (xrdp_mcs_recv(self->mcs_layer, s, chan) != 0)
|
|
{
|
|
DEBUG((" out xrdp_sec_recv : error"));
|
|
g_writeln("xrdp_sec_recv: xrdp_mcs_recv failed");
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
|
|
if (!(self->is_security_header_present))
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
in_uint32_le(s, flags);
|
|
DEBUG((" in xrdp_sec_recv flags $%x", flags));
|
|
|
|
if (flags & SEC_ENCRYPT) /* 0x08 */
|
|
{
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
if (!s_check_rem(s, 12))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_le(s, len);
|
|
in_uint8(s, ver);
|
|
if ((len != 16) || (ver != 1))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, pad);
|
|
LLOGLN(10, ("xrdp_sec_recv: len %d ver %d pad %d", len, ver, pad));
|
|
in_uint8s(s, 8); /* signature(8) */
|
|
LLOGLN(10, ("xrdp_sec_recv: data len %d", (int)(s->end - s->p)));
|
|
xrdp_sec_fips_decrypt(self, s->p, (int)(s->end - s->p));
|
|
s->end -= pad;
|
|
}
|
|
else if (self->crypt_level > CRYPT_LEVEL_NONE)
|
|
{
|
|
if (!s_check_rem(s, 8))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 8); /* signature(8) */
|
|
xrdp_sec_decrypt(self, s->p, (int)(s->end - s->p));
|
|
}
|
|
}
|
|
|
|
if (flags & SEC_CLIENT_RANDOM) /* 0x01 */
|
|
{
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint32_le(s, len);
|
|
/* 512, 2048 bit */
|
|
if ((len != 64 + 8) && (len != 256 + 8))
|
|
{
|
|
return 1;
|
|
}
|
|
if (!s_check_rem(s, len - 8))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8a(s, self->client_crypt_random, len - 8);
|
|
xrdp_sec_rsa_op(self, self->client_random, self->client_crypt_random,
|
|
len - 8, self->pub_mod, self->pri_exp);
|
|
LLOGLN(10, ("xrdp_sec_recv: client random - len %d", len));
|
|
LHEXDUMP(10, (self->client_random, 256));
|
|
LHEXDUMP(10, (self->client_crypt_random, len - 8));
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
xrdp_sec_fips_establish_keys(self);
|
|
}
|
|
else if (self->crypt_method != CRYPT_METHOD_NONE)
|
|
{
|
|
xrdp_sec_establish_keys(self);
|
|
}
|
|
*chan = 1; /* just set a non existing channel and exit */
|
|
DEBUG((" out xrdp_sec_recv"));
|
|
return 0;
|
|
}
|
|
|
|
if (flags & SEC_LOGON_INFO) /* 0x40 */
|
|
{
|
|
if (xrdp_sec_process_logon_info(self, s) != 0)
|
|
{
|
|
DEBUG((" out xrdp_sec_recv error"));
|
|
return 1;
|
|
}
|
|
|
|
if (self->rdp_layer->client_info.is_mce)
|
|
{
|
|
if (xrdp_sec_send_media_lic_response(self) != 0)
|
|
{
|
|
DEBUG((" out xrdp_sec_recv error"));
|
|
return 1;
|
|
}
|
|
|
|
DEBUG((" out xrdp_sec_recv"));
|
|
return -1; /* special error that means send demand active */
|
|
}
|
|
|
|
if (xrdp_sec_send_lic_initial(self) != 0)
|
|
{
|
|
DEBUG((" out xrdp_sec_recv error"));
|
|
return 1;
|
|
}
|
|
|
|
*chan = 1; /* just set a non existing channel and exit */
|
|
DEBUG((" out xrdp_sec_recv"));
|
|
return 0;
|
|
}
|
|
|
|
if (flags & SEC_LICENCE_NEG) /* 0x80 */
|
|
{
|
|
if (xrdp_sec_send_lic_response(self) != 0)
|
|
{
|
|
DEBUG((" out xrdp_sec_recv error"));
|
|
return 1;
|
|
}
|
|
|
|
if (self->crypt_level == CRYPT_LEVEL_NONE
|
|
&& self->crypt_method == CRYPT_METHOD_NONE)
|
|
{
|
|
/* in tls mode, no more security header from now on */
|
|
self->is_security_header_present = 0;
|
|
}
|
|
|
|
DEBUG((" out xrdp_sec_recv"));
|
|
return -1; /* special error that means send demand active */
|
|
}
|
|
|
|
DEBUG((" out xrdp_sec_recv"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Output a uint32 into a buffer (little-endian) */
|
|
static void
|
|
buf_out_uint32(char *buffer, int value)
|
|
{
|
|
buffer[0] = (value) & 0xff;
|
|
buffer[1] = (value >> 8) & 0xff;
|
|
buffer[2] = (value >> 16) & 0xff;
|
|
buffer[3] = (value >> 24) & 0xff;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */
|
|
static void APP_CC
|
|
xrdp_sec_fips_sign(struct xrdp_sec *self, char *out, int out_len,
|
|
char *data, int data_len)
|
|
{
|
|
char buf[20];
|
|
char lenhdr[4];
|
|
|
|
buf_out_uint32(lenhdr, self->encrypt_use_count);
|
|
ssl_hmac_sha1_init(self->sign_fips_info, self->fips_sign_key, 20);
|
|
ssl_hmac_transform(self->sign_fips_info, data, data_len);
|
|
ssl_hmac_transform(self->sign_fips_info, lenhdr, 4);
|
|
ssl_hmac_complete(self->sign_fips_info, buf, 20);
|
|
g_memcpy(out, buf, out_len);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Generate a MAC hash (5.2.3.1), using a combination of SHA1 and MD5 */
|
|
static void APP_CC
|
|
xrdp_sec_sign(struct xrdp_sec *self, char *out, int out_len,
|
|
char *data, int data_len)
|
|
{
|
|
char shasig[20];
|
|
char md5sig[16];
|
|
char lenhdr[4];
|
|
void *sha1_info;
|
|
void *md5_info;
|
|
|
|
buf_out_uint32(lenhdr, data_len);
|
|
sha1_info = ssl_sha1_info_create();
|
|
md5_info = ssl_md5_info_create();
|
|
ssl_sha1_clear(sha1_info);
|
|
ssl_sha1_transform(sha1_info, self->sign_key, self->rc4_key_len);
|
|
ssl_sha1_transform(sha1_info, (char *)g_pad_54, 40);
|
|
ssl_sha1_transform(sha1_info, lenhdr, 4);
|
|
ssl_sha1_transform(sha1_info, data, data_len);
|
|
ssl_sha1_complete(sha1_info, shasig);
|
|
ssl_md5_clear(md5_info);
|
|
ssl_md5_transform(md5_info, self->sign_key, self->rc4_key_len);
|
|
ssl_md5_transform(md5_info, (char *)g_pad_92, 48);
|
|
ssl_md5_transform(md5_info, shasig, 20);
|
|
ssl_md5_complete(md5_info, md5sig);
|
|
g_memcpy(out, md5sig, out_len);
|
|
ssl_sha1_info_delete(sha1_info);
|
|
ssl_md5_info_delete(md5_info);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_sec_send(struct xrdp_sec *self, struct stream *s, int chan)
|
|
{
|
|
int datalen;
|
|
int pad;
|
|
|
|
LLOGLN(10, ("xrdp_sec_send:"));
|
|
DEBUG((" in xrdp_sec_send"));
|
|
s_pop_layer(s, sec_hdr);
|
|
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_send: fips"));
|
|
out_uint32_le(s, SEC_ENCRYPT);
|
|
datalen = (int)((s->end - s->p) - 12);
|
|
out_uint16_le(s, 16); /* crypto header size */
|
|
out_uint8(s, 1); /* fips version */
|
|
pad = (8 - (datalen % 8)) & 7;
|
|
g_memset(s->end, 0, pad);
|
|
s->end += pad;
|
|
out_uint8(s, pad); /* fips pad */
|
|
xrdp_sec_fips_sign(self, s->p, 8, s->p + 8, datalen);
|
|
xrdp_sec_fips_encrypt(self, s->p + 8, datalen + pad);
|
|
}
|
|
else if (self->crypt_level > CRYPT_LEVEL_LOW)
|
|
{
|
|
out_uint32_le(s, SEC_ENCRYPT);
|
|
datalen = (int)((s->end - s->p) - 8);
|
|
xrdp_sec_sign(self, s->p, 8, s->p + 8, datalen);
|
|
xrdp_sec_encrypt(self, s->p + 8, datalen);
|
|
}
|
|
else
|
|
{
|
|
// out_uint32_le(s, 0);
|
|
}
|
|
|
|
if (xrdp_mcs_send(self->mcs_layer, s, chan) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
DEBUG((" out xrdp_sec_send"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns the fastpath sec byte count */
|
|
int APP_CC
|
|
xrdp_sec_get_fastpath_bytes(struct xrdp_sec *self)
|
|
{
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
return 3 + 4 + 8;
|
|
}
|
|
else if (self->crypt_level > CRYPT_LEVEL_LOW)
|
|
{
|
|
return 3 + 8;
|
|
}
|
|
return 3;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_sec_init_fastpath(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
if (xrdp_fastpath_init(self->fastpath_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
s_push_layer(s, sec_hdr, 3 + 4 + 8);
|
|
}
|
|
else if (self->crypt_level > CRYPT_LEVEL_LOW)
|
|
{
|
|
s_push_layer(s, sec_hdr, 3 + 8);
|
|
}
|
|
else
|
|
{
|
|
s_push_layer(s, sec_hdr, 3);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
/* 2.2.9.1.2 Server Fast-Path Update PDU (TS_FP_UPDATE_PDU)
|
|
* http://msdn.microsoft.com/en-us/library/cc240621.aspx */
|
|
int APP_CC
|
|
xrdp_sec_send_fastpath(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
int secFlags;
|
|
int fpOutputHeader;
|
|
int datalen;
|
|
int pdulen;
|
|
int pad;
|
|
int error;
|
|
char save[8];
|
|
|
|
LLOGLN(10, ("xrdp_sec_send_fastpath:"));
|
|
error = 0;
|
|
s_pop_layer(s, sec_hdr);
|
|
if (self->crypt_level == CRYPT_LEVEL_FIPS)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_send_fastpath: fips"));
|
|
pdulen = (int)(s->end - s->p);
|
|
datalen = pdulen - 15;
|
|
pad = (8 - (datalen % 8)) & 7;
|
|
secFlags = 0x2;
|
|
fpOutputHeader = secFlags << 6;
|
|
out_uint8(s, fpOutputHeader);
|
|
pdulen += pad;
|
|
pdulen |= 0x8000;
|
|
out_uint16_be(s, pdulen);
|
|
out_uint16_le(s, 16); /* crypto header size */
|
|
out_uint8(s, 1); /* fips version */
|
|
s->end += pad;
|
|
out_uint8(s, pad); /* fips pad */
|
|
xrdp_sec_fips_sign(self, s->p, 8, s->p + 8, datalen);
|
|
g_memcpy(save, s->p + 8 + datalen, pad);
|
|
g_memset(s->p + 8 + datalen, 0, pad);
|
|
xrdp_sec_fips_encrypt(self, s->p + 8, datalen + pad);
|
|
error = xrdp_fastpath_send(self->fastpath_layer, s);
|
|
g_memcpy(s->p + 8 + datalen, save, pad);
|
|
}
|
|
else if (self->crypt_level > CRYPT_LEVEL_LOW)
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_send_fastpath: crypt"));
|
|
pdulen = (int)(s->end - s->p);
|
|
datalen = pdulen - 11;
|
|
secFlags = 0x2;
|
|
fpOutputHeader = secFlags << 6;
|
|
out_uint8(s, fpOutputHeader);
|
|
pdulen |= 0x8000;
|
|
out_uint16_be(s, pdulen);
|
|
xrdp_sec_sign(self, s->p, 8, s->p + 8, datalen);
|
|
xrdp_sec_encrypt(self, s->p + 8, datalen);
|
|
error = xrdp_fastpath_send(self->fastpath_layer, s);
|
|
}
|
|
else
|
|
{
|
|
LLOGLN(10, ("xrdp_sec_send_fastpath: no crypt"));
|
|
pdulen = (int)(s->end - s->p);
|
|
LLOGLN(10, ("xrdp_sec_send_fastpath: pdulen %d", pdulen));
|
|
secFlags = 0x0;
|
|
fpOutputHeader = secFlags << 6;
|
|
out_uint8(s, fpOutputHeader);
|
|
pdulen |= 0x8000;
|
|
out_uint16_be(s, pdulen);
|
|
error = xrdp_fastpath_send(self->fastpath_layer, s);
|
|
}
|
|
if (error != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* http://msdn.microsoft.com/en-us/library/cc240510.aspx
|
|
2.2.1.3.2 Client Core Data (TS_UD_CS_CORE) */
|
|
static int APP_CC
|
|
xrdp_sec_process_mcs_data_CS_CORE(struct xrdp_sec* self, struct stream* s)
|
|
{
|
|
int colorDepth;
|
|
int postBeta2ColorDepth;
|
|
int highColorDepth;
|
|
int supportedColorDepths;
|
|
int earlyCapabilityFlags;
|
|
|
|
in_uint8s(s, 4); /* version */
|
|
in_uint16_le(s, self->rdp_layer->client_info.width);
|
|
in_uint16_le(s, self->rdp_layer->client_info.height);
|
|
in_uint16_le(s, colorDepth);
|
|
g_writeln("colorDepth 0x%4.4x (0xca00 4bpp 0xca01 8bpp)", colorDepth);
|
|
switch (colorDepth)
|
|
{
|
|
case 0xca00: /* RNS_UD_COLOR_4BPP */
|
|
self->rdp_layer->client_info.bpp = 4;
|
|
break;
|
|
case 0xca01: /* RNS_UD_COLOR_8BPP */
|
|
self->rdp_layer->client_info.bpp = 8;
|
|
break;
|
|
}
|
|
in_uint8s(s, 2); /* SASSequence */
|
|
in_uint8s(s, 4); /* keyboardLayout */
|
|
in_uint8s(s, 4); /* clientBuild */
|
|
in_uint8s(s, 32); /* clientName */
|
|
in_uint8s(s, 4); /* keyboardType */
|
|
in_uint8s(s, 4); /* keyboardSubType */
|
|
in_uint8s(s, 4); /* keyboardFunctionKey */
|
|
in_uint8s(s, 64); /* imeFileName */
|
|
in_uint16_le(s, postBeta2ColorDepth);
|
|
g_writeln("postBeta2ColorDepth 0x%4.4x (0xca00 4bpp 0xca01 8bpp "
|
|
"0xca02 15bpp 0xca03 16bpp 0xca04 24bpp)", postBeta2ColorDepth);
|
|
|
|
switch (postBeta2ColorDepth)
|
|
{
|
|
case 0xca00: /* RNS_UD_COLOR_4BPP */
|
|
self->rdp_layer->client_info.bpp = 4;
|
|
break;
|
|
case 0xca01: /* RNS_UD_COLOR_8BPP */
|
|
self->rdp_layer->client_info.bpp = 8;
|
|
break;
|
|
case 0xca02: /* RNS_UD_COLOR_16BPP_555 */
|
|
self->rdp_layer->client_info.bpp = 15;
|
|
break;
|
|
case 0xca03: /* RNS_UD_COLOR_16BPP_565 */
|
|
self->rdp_layer->client_info.bpp = 16;
|
|
break;
|
|
case 0xca04: /* RNS_UD_COLOR_24BPP */
|
|
self->rdp_layer->client_info.bpp = 24;
|
|
break;
|
|
}
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 2); /* clientProductId */
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 4); /* serialNumber */
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint16_le(s, highColorDepth);
|
|
g_writeln("highColorDepth 0x%4.4x (0x0004 4bpp 0x0008 8bpp 0x000f 15bpp "
|
|
"0x0010 16 bpp 0x0018 24bpp)", highColorDepth);
|
|
self->rdp_layer->client_info.bpp = highColorDepth;
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint16_le(s, supportedColorDepths);
|
|
g_writeln("supportedColorDepths 0x%4.4x (0x0001 24bpp 0x0002 16bpp "
|
|
"0x0004 15bpp 0x0008 32bpp)", supportedColorDepths);
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint16_le(s, earlyCapabilityFlags);
|
|
self->rdp_layer->client_info.mcs_early_capability_flags = earlyCapabilityFlags;
|
|
g_writeln("earlyCapabilityFlags 0x%4.4x (0x0002 want32)",
|
|
earlyCapabilityFlags);
|
|
if ((earlyCapabilityFlags & 0x0002) && (supportedColorDepths & 0x0008))
|
|
{
|
|
self->rdp_layer->client_info.bpp = 32;
|
|
}
|
|
|
|
if (!s_check_rem(s, 64))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 64); /* clientDigProductId */
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8(s, self->rdp_layer->client_info.mcs_connection_type); /* connectionType */
|
|
g_writeln("got client client connection type 0x%8.8x",
|
|
self->rdp_layer->client_info.mcs_connection_type);
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 1); /* pad1octet */
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 4); /* serverSelectedProtocol */
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 4); /* desktopPhysicalWidth */
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 4); /* desktopPhysicalHeight */
|
|
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 0;
|
|
}
|
|
in_uint8s(s, 2); /* reserved */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
static int APP_CC
|
|
xrdp_sec_process_mcs_data_CS_SECURITY(struct xrdp_sec *self, struct stream* s)
|
|
{
|
|
int crypt_method;
|
|
int found;
|
|
|
|
g_writeln("xrdp_sec_process_mcs_data_CS_SECURITY:");
|
|
in_uint32_le(s, crypt_method);
|
|
if (crypt_method & CRYPT_METHOD_40BIT)
|
|
{
|
|
g_writeln(" client supports 40 bit encryption");
|
|
}
|
|
if (crypt_method & CRYPT_METHOD_128BIT)
|
|
{
|
|
g_writeln(" client supports 128 bit encryption");
|
|
}
|
|
if (crypt_method & CRYPT_METHOD_56BIT)
|
|
{
|
|
g_writeln(" client supports 56 bit encryption");
|
|
}
|
|
if (crypt_method & CRYPT_METHOD_FIPS)
|
|
{
|
|
g_writeln(" client supports fips encryption");
|
|
}
|
|
found = 0;
|
|
if ((found == 0) &&
|
|
(self->crypt_method & CRYPT_METHOD_FIPS) &&
|
|
(self->crypt_level == CRYPT_LEVEL_FIPS))
|
|
{
|
|
if (crypt_method & CRYPT_METHOD_FIPS)
|
|
{
|
|
g_writeln(" client and server support fips, using fips");
|
|
self->crypt_method = CRYPT_METHOD_FIPS;
|
|
self->crypt_level = CRYPT_LEVEL_FIPS;
|
|
found = 1;
|
|
}
|
|
}
|
|
if ((found == 0) &&
|
|
(self->crypt_method & CRYPT_METHOD_128BIT) &&
|
|
(self->crypt_level == CRYPT_LEVEL_HIGH))
|
|
{
|
|
if (crypt_method & CRYPT_METHOD_128BIT)
|
|
{
|
|
g_writeln(" client and server support high crypt, using "
|
|
"high crypt");
|
|
self->crypt_method = CRYPT_METHOD_128BIT;
|
|
self->crypt_level = CRYPT_LEVEL_HIGH;
|
|
found = 1;
|
|
}
|
|
}
|
|
if ((found == 0) &&
|
|
(self->crypt_method & CRYPT_METHOD_40BIT) &&
|
|
(self->crypt_level == CRYPT_LEVEL_CLIENT_COMPATIBLE))
|
|
{
|
|
if (crypt_method & CRYPT_METHOD_40BIT)
|
|
{
|
|
g_writeln(" client and server support medium crypt, using "
|
|
"medium crypt");
|
|
self->crypt_method = CRYPT_METHOD_40BIT;
|
|
self->crypt_level = CRYPT_LEVEL_CLIENT_COMPATIBLE;
|
|
found = 1;
|
|
}
|
|
}
|
|
if ((found == 0) &&
|
|
(self->crypt_method & CRYPT_METHOD_40BIT) &&
|
|
(self->crypt_level == CRYPT_LEVEL_LOW))
|
|
{
|
|
if (crypt_method & CRYPT_METHOD_40BIT)
|
|
{
|
|
g_writeln(" client and server support low crypt, using "
|
|
"low crypt");
|
|
self->crypt_method = CRYPT_METHOD_40BIT;
|
|
self->crypt_level = CRYPT_LEVEL_LOW;
|
|
found = 1;
|
|
}
|
|
}
|
|
if ((found == 0) &&
|
|
(self->crypt_level == CRYPT_LEVEL_NONE))
|
|
{
|
|
if (crypt_method == CRYPT_METHOD_NONE)
|
|
{
|
|
g_writeln(" client and server support none crypt, using "
|
|
"none crypt");
|
|
self->crypt_method = CRYPT_METHOD_NONE;
|
|
self->crypt_level = CRYPT_LEVEL_NONE;
|
|
found = 1;
|
|
}
|
|
}
|
|
// if (found == 0)
|
|
// {
|
|
// g_writeln(" can not find client / server agreed encryption method");
|
|
// return 1;
|
|
// }
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* this adds the mcs channels in the list of channels to be used when
|
|
creating the server mcs data */
|
|
static int APP_CC
|
|
xrdp_sec_process_mcs_data_channels(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
int num_channels;
|
|
int index;
|
|
struct mcs_channel_item *channel_item;
|
|
struct xrdp_client_info *client_info = (struct xrdp_client_info *)NULL;
|
|
|
|
client_info = &(self->rdp_layer->client_info);
|
|
|
|
|
|
DEBUG(("processing channels, channel_code is %d", client_info->channel_code));
|
|
|
|
/* this is an option set in xrdp.ini */
|
|
if (client_info->channel_code != 1) /* are channels on? */
|
|
{
|
|
g_writeln("Processing channel data from client - The channel is off");
|
|
return 0;
|
|
}
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint32_le(s, num_channels);
|
|
|
|
if (num_channels > 31)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
for (index = 0; index < num_channels; index++)
|
|
{
|
|
struct mcs_channel_item *channel_item;
|
|
|
|
channel_item = (struct mcs_channel_item *)
|
|
g_malloc(sizeof(struct mcs_channel_item), 1);
|
|
if (!s_check_rem(s, 12))
|
|
{
|
|
g_free(channel_item);
|
|
return 1;
|
|
}
|
|
in_uint8a(s, channel_item->name, 8);
|
|
in_uint32_le(s, channel_item->flags);
|
|
channel_item->chanid = MCS_GLOBAL_CHANNEL + (index + 1);
|
|
list_add_item(self->mcs_layer->channel_list, (tintptr) channel_item);
|
|
DEBUG(("got channel flags %8.8x name %s", channel_item->flags,
|
|
channel_item->name));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* reads the client monitors data */
|
|
static int APP_CC
|
|
xrdp_sec_process_mcs_data_monitors(struct xrdp_sec *self, struct stream *s)
|
|
{
|
|
int index;
|
|
int monitorCount;
|
|
int flags;
|
|
struct xrdp_client_info *client_info = (struct xrdp_client_info *)NULL;
|
|
|
|
client_info = &(self->rdp_layer->client_info);
|
|
|
|
DEBUG(("processing monitors data, allow_multimon is %d", client_info->multimon));
|
|
/* this is an option set in xrdp.ini */
|
|
if (client_info->multimon != 1) /* are multi-monitors allowed ? */
|
|
{
|
|
DEBUG(("[INFO] xrdp_sec_process_mcs_data_monitors: multimon is not "
|
|
"allowed, skipping"));
|
|
return 0;
|
|
}
|
|
in_uint32_le(s, flags); /* flags */
|
|
//verify flags - must be 0x0
|
|
if (flags != 0)
|
|
{
|
|
DEBUG(("[ERROR] xrdp_sec_process_mcs_data_monitors: flags MUST be "
|
|
"zero, detected: %d", flags));
|
|
return 1;
|
|
}
|
|
in_uint32_le(s, monitorCount);
|
|
//verify monitorCount - max 16
|
|
if (monitorCount > 16)
|
|
{
|
|
DEBUG(("[ERROR] xrdp_sec_process_mcs_data_monitors: max allowed "
|
|
"monitors is 16, detected: %d", monitorCount));
|
|
return 1;
|
|
}
|
|
|
|
g_writeln("monitorCount= %d", monitorCount); // for debugging only
|
|
|
|
client_info->monitorCount = monitorCount;
|
|
|
|
/* Add client_monitor_data to client_info struct, will later pass to X11rdp */
|
|
for (index = 0; index < monitorCount; index++)
|
|
{
|
|
in_uint32_le(s, client_info->minfo[index].left);
|
|
in_uint32_le(s, client_info->minfo[index].top);
|
|
in_uint32_le(s, client_info->minfo[index].right);
|
|
in_uint32_le(s, client_info->minfo[index].bottom);
|
|
in_uint32_le(s, client_info->minfo[index].is_primary);
|
|
|
|
g_writeln("got a monitor: left= %d, top= %d, right= %d, bottom= %d, is_primary?= %d", client_info->minfo[index].left,
|
|
client_info->minfo[index].top, client_info->minfo[index].right, client_info->minfo[index].bottom, client_info->minfo[index].is_primary);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* process client mcs data, we need some things in here to create the server
|
|
mcs data */
|
|
int APP_CC
|
|
xrdp_sec_process_mcs_data(struct xrdp_sec *self)
|
|
{
|
|
struct stream *s = (struct stream *)NULL;
|
|
char *hold_p = (char *)NULL;
|
|
int tag = 0;
|
|
int size = 0;
|
|
|
|
s = &(self->client_mcs_data);
|
|
/* set p to beginning */
|
|
s->p = s->data;
|
|
/* skip header */
|
|
if (!s_check_rem(s, 23))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 23);
|
|
|
|
while (s_check_rem(s, 4))
|
|
{
|
|
hold_p = s->p;
|
|
in_uint16_le(s, tag);
|
|
in_uint16_le(s, size);
|
|
|
|
if ((size < 4) || (!s_check_rem(s, size - 4)))
|
|
{
|
|
LLOGLN(0, ("error in xrdp_sec_process_mcs_data tag %d size %d",
|
|
tag, size));
|
|
break;
|
|
}
|
|
|
|
LLOGLN(10, ("xrdp_sec_process_mcs_data: 0x%8.8x", tag));
|
|
switch (tag)
|
|
{
|
|
case SEC_TAG_CLI_INFO: /* CS_CORE 0xC001 */
|
|
if (xrdp_sec_process_mcs_data_CS_CORE(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
break;
|
|
case SEC_TAG_CLI_CRYPT: /* CS_SECURITY 0xC002 */
|
|
if (xrdp_sec_process_mcs_data_CS_SECURITY(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
break;
|
|
case SEC_TAG_CLI_CHANNELS: /* CS_NET 0xC003 */
|
|
if (xrdp_sec_process_mcs_data_channels(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
break;
|
|
case SEC_TAG_CLI_4: /* CS_CLUSTER 0xC004 */
|
|
break;
|
|
case SEC_TAG_CLI_MONITOR: /* CS_MONITOR 0xC005 */
|
|
if (xrdp_sec_process_mcs_data_monitors(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
break;
|
|
/* CS_MCS_MSGCHANNEL 0xC006
|
|
CS_MONITOR_EX 0xC008
|
|
CS_MULTITRANSPORT 0xC00A
|
|
SC_CORE 0x0C01
|
|
SC_SECURITY 0x0C02
|
|
SC_NET 0x0C03
|
|
SC_MCS_MSGCHANNEL 0x0C04
|
|
SC_MULTITRANSPORT 0x0C08 */
|
|
default:
|
|
LLOGLN(0, ("error unknown xrdp_sec_process_mcs_data "
|
|
"tag 0x%4.4x size %d", tag, size));
|
|
break;
|
|
}
|
|
|
|
s->p = hold_p + size;
|
|
}
|
|
|
|
if (self->rdp_layer->client_info.max_bpp > 0)
|
|
{
|
|
if (self->rdp_layer->client_info.bpp >
|
|
self->rdp_layer->client_info.max_bpp)
|
|
{
|
|
LLOGLN(0, ("xrdp_rdp_parse_client_mcs_data: client asked "
|
|
"for %dbpp connection but configuration is limited "
|
|
"to %dbpp", self->rdp_layer->client_info.bpp,
|
|
self->rdp_layer->client_info.max_bpp));
|
|
self->rdp_layer->client_info.bpp =
|
|
self->rdp_layer->client_info.max_bpp;
|
|
}
|
|
}
|
|
|
|
/* set p to beginning */
|
|
s->p = s->data;
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* process the mcs client data we received from the mcs layer */
|
|
static int APP_CC
|
|
xrdp_sec_in_mcs_data(struct xrdp_sec *self)
|
|
{
|
|
struct stream *s = (struct stream *)NULL;
|
|
struct xrdp_client_info *client_info = (struct xrdp_client_info *)NULL;
|
|
int index = 0;
|
|
char c = 0;
|
|
|
|
client_info = &(self->rdp_layer->client_info);
|
|
s = &(self->client_mcs_data);
|
|
/* get hostname, its unicode */
|
|
s->p = s->data;
|
|
if (!s_check_rem(s, 47))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 47);
|
|
g_memset(client_info->hostname, 0, 32);
|
|
c = 1;
|
|
index = 0;
|
|
|
|
while (index < 16 && c != 0)
|
|
{
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, c);
|
|
in_uint8s(s, 1);
|
|
client_info->hostname[index] = c;
|
|
index++;
|
|
}
|
|
/* get build */
|
|
s->p = s->data;
|
|
if (!s_check_rem(s, 43 + 4))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 43);
|
|
in_uint32_le(s, client_info->build);
|
|
/* get keylayout */
|
|
s->p = s->data;
|
|
if (!s_check_rem(s, 39 + 4))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 39);
|
|
in_uint32_le(s, client_info->keylayout);
|
|
/* get keyboard type / subtype */
|
|
s->p = s->data;
|
|
if (!s_check_rem(s, 79 + 8))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 79);
|
|
in_uint32_le(s, client_info->keyboard_type);
|
|
in_uint32_le(s, client_info->keyboard_subtype);
|
|
xrdp_load_keyboard_layout(client_info);
|
|
s->p = s->data;
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_sec_init_rdp_security(struct xrdp_sec *self)
|
|
{
|
|
switch (self->rdp_layer->client_info.crypt_level)
|
|
{
|
|
case 0: /* none */
|
|
self->crypt_method = CRYPT_METHOD_NONE;
|
|
self->crypt_level = CRYPT_LEVEL_NONE;
|
|
break;
|
|
case 1: /* low */
|
|
self->crypt_method = CRYPT_METHOD_40BIT;
|
|
self->crypt_level = CRYPT_LEVEL_LOW;
|
|
break;
|
|
case 2: /* medium */
|
|
self->crypt_method = CRYPT_METHOD_40BIT;
|
|
self->crypt_level = CRYPT_LEVEL_CLIENT_COMPATIBLE;
|
|
break;
|
|
case 3: /* high */
|
|
self->crypt_method = CRYPT_METHOD_128BIT;
|
|
self->crypt_level = CRYPT_LEVEL_HIGH;
|
|
break;
|
|
case 4: /* fips */
|
|
self->crypt_method = CRYPT_METHOD_FIPS;
|
|
self->crypt_level = CRYPT_LEVEL_FIPS;
|
|
break;
|
|
default:
|
|
g_writeln("Fatal : Illegal crypt_level");
|
|
break ;
|
|
}
|
|
|
|
if (self->decrypt_rc4_info != NULL)
|
|
{
|
|
g_writeln("xrdp_sec_init_rdp_security: decrypt_rc4_info already created !!!");
|
|
}
|
|
else
|
|
{
|
|
self->decrypt_rc4_info = ssl_rc4_info_create();
|
|
}
|
|
|
|
if (self->encrypt_rc4_info != NULL)
|
|
{
|
|
g_writeln("xrdp_sec_init_rdp_security: encrypt_rc4_info already created !!!");
|
|
}
|
|
else
|
|
{
|
|
self->encrypt_rc4_info = ssl_rc4_info_create();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int APP_CC
|
|
xrdp_sec_incoming(struct xrdp_sec *self)
|
|
{
|
|
struct list *items = NULL;
|
|
struct list *values = NULL;
|
|
struct xrdp_iso *iso;
|
|
int index = 0;
|
|
char *item = NULL;
|
|
char *value = NULL;
|
|
char key_file[256];
|
|
|
|
DEBUG((" in xrdp_sec_incoming:"));
|
|
iso = self->mcs_layer->iso_layer;
|
|
|
|
/* negotiate security layer */
|
|
if (xrdp_iso_incoming(iso) != 0)
|
|
{
|
|
DEBUG(("xrdp_sec_incoming: xrdp_iso_incoming failed"));
|
|
return 1;
|
|
}
|
|
|
|
/* initialize selected security layer */
|
|
if (iso->requestedProtocol > PROTOCOL_RDP)
|
|
{
|
|
/* init tls security */
|
|
DEBUG((" in xrdp_sec_incoming: init tls security"));
|
|
|
|
if (trans_set_tls_mode(self->mcs_layer->iso_layer->trans,
|
|
self->rdp_layer->client_info.key_file,
|
|
self->rdp_layer->client_info.certificate) != 0)
|
|
{
|
|
g_writeln("xrdp_sec_incoming: trans_set_tls_mode failed");
|
|
return 1;
|
|
}
|
|
|
|
self->crypt_level = CRYPT_LEVEL_NONE;
|
|
self->crypt_method = CRYPT_METHOD_NONE;
|
|
self->rsa_key_bytes = 0;
|
|
|
|
}
|
|
else
|
|
{
|
|
/* init rdp security */
|
|
DEBUG((" in xrdp_sec_incoming: init rdp security"));
|
|
if (xrdp_sec_init_rdp_security(self) != 0)
|
|
{
|
|
DEBUG(("xrdp_sec_incoming: xrdp_sec_init_rdp_security failed"));
|
|
return 1;
|
|
}
|
|
if (self->crypt_method != CRYPT_METHOD_NONE)
|
|
{
|
|
g_memset(key_file, 0, sizeof(char) * 256);
|
|
g_random(self->server_random, 32);
|
|
items = list_create();
|
|
items->auto_free = 1;
|
|
values = list_create();
|
|
values->auto_free = 1;
|
|
g_snprintf(key_file, 255, "%s/rsakeys.ini", XRDP_CFG_PATH);
|
|
|
|
if (file_by_name_read_section(key_file, "keys", items, values) != 0)
|
|
{
|
|
/* this is a show stopper */
|
|
log_message(LOG_LEVEL_ALWAYS, "XRDP cannot read file: %s "
|
|
"(check permissions)", key_file);
|
|
list_delete(items);
|
|
list_delete(values);
|
|
return 1;
|
|
}
|
|
|
|
for (index = 0; index < items->count; index++)
|
|
{
|
|
item = (char *)list_get_item(items, index);
|
|
value = (char *)list_get_item(values, index);
|
|
|
|
if (g_strcasecmp(item, "pub_exp") == 0)
|
|
{
|
|
hex_str_to_bin(value, self->pub_exp, 4);
|
|
}
|
|
else if (g_strcasecmp(item, "pub_mod") == 0)
|
|
{
|
|
self->rsa_key_bytes = (g_strlen(value) + 1) / 5;
|
|
g_writeln("pub_mod bytes %d", self->rsa_key_bytes);
|
|
hex_str_to_bin(value, self->pub_mod, self->rsa_key_bytes);
|
|
}
|
|
else if (g_strcasecmp(item, "pub_sig") == 0)
|
|
{
|
|
hex_str_to_bin(value, self->pub_sig, 64);
|
|
}
|
|
else if (g_strcasecmp(item, "pri_exp") == 0)
|
|
{
|
|
self->rsa_key_bytes = (g_strlen(value) + 1) / 5;
|
|
g_writeln("pri_exp %d", self->rsa_key_bytes);
|
|
hex_str_to_bin(value, self->pri_exp, self->rsa_key_bytes);
|
|
}
|
|
}
|
|
list_delete(items);
|
|
list_delete(values);
|
|
}
|
|
}
|
|
|
|
/* negotiate mcs layer */
|
|
if (xrdp_mcs_incoming(self->mcs_layer) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#ifdef XRDP_DEBUG
|
|
g_writeln("client mcs data received");
|
|
g_hexdump(self->client_mcs_data.data,
|
|
(int)(self->client_mcs_data.end - self->client_mcs_data.data));
|
|
g_writeln("server mcs data sent");
|
|
g_hexdump(self->server_mcs_data.data,
|
|
(int)(self->server_mcs_data.end - self->server_mcs_data.data));
|
|
#endif
|
|
DEBUG((" out xrdp_sec_incoming"));
|
|
if (xrdp_sec_in_mcs_data(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
LLOGLN(10, ("xrdp_sec_incoming: out"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int APP_CC
|
|
xrdp_sec_disconnect(struct xrdp_sec *self)
|
|
{
|
|
int rv;
|
|
|
|
DEBUG((" in xrdp_sec_disconnect"));
|
|
rv = xrdp_mcs_disconnect(self->mcs_layer);
|
|
DEBUG((" out xrdp_sec_disconnect"));
|
|
return rv;
|
|
}
|