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xrdp/libxrdp/xrdp_sec.c
jsorg71 ae1514c167
dynamic virtual channel improvements 
remove not used chansrv <-> xrdp messages
move static channel disable control into libxrdp
remove some blocking read, write chansrv calls
add drdynvc calls to libxrdp
add drdynvc calls to chansrv
channel cleanup
2018-10-11 22:09:20 -07:00

2386 lines
73 KiB
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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2014
*
* 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.
*
* secure layer
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include "libxrdp.h"
#include "log.h"
#define LOG_LEVEL 1
#define LLOG(_level, _args) \
do { if (_level < LOG_LEVEL) { g_write _args ; } } while (0)
#define LLOGLN(_level, _args) \
do { if (_level < LOG_LEVEL) { g_writeln _args ; } } while (0)
#define LHEXDUMP(_level, _args) \
do { if (_level < LOG_LEVEL) { g_hexdump _args ; } } while (0)
/* some compilers need unsigned char to avoid warnings */
static tui8 g_pad_54[40] =
{
54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,
54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,
54, 54, 54, 54, 54, 54, 54, 54
};
/* some compilers need unsigned char to avoid warnings */
static tui8 g_pad_92[48] =
{
92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92,
92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92,
92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92
};
/* some compilers need unsigned char to avoid warnings */
static tui8 g_lic1[322] =
{
0x80, 0x00, 0x3e, 0x01, 0x01, 0x02, 0x3e, 0x01,
0x7b, 0x3c, 0x31, 0xa6, 0xae, 0xe8, 0x74, 0xf6,
0xb4, 0xa5, 0x03, 0x90, 0xe7, 0xc2, 0xc7, 0x39,
0xba, 0x53, 0x1c, 0x30, 0x54, 0x6e, 0x90, 0x05,
0xd0, 0x05, 0xce, 0x44, 0x18, 0x91, 0x83, 0x81,
0x00, 0x00, 0x04, 0x00, 0x2c, 0x00, 0x00, 0x00,
0x4d, 0x00, 0x69, 0x00, 0x63, 0x00, 0x72, 0x00,
0x6f, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x66, 0x00,
0x74, 0x00, 0x20, 0x00, 0x43, 0x00, 0x6f, 0x00,
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,
0x48, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
0x3f, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00,
0x01, 0xc7, 0xc9, 0xf7, 0x8e, 0x5a, 0x38, 0xe4,
0x29, 0xc3, 0x00, 0x95, 0x2d, 0xdd, 0x4c, 0x3e,
0x50, 0x45, 0x0b, 0x0d, 0x9e, 0x2a, 0x5d, 0x18,
0x63, 0x64, 0xc4, 0x2c, 0xf7, 0x8f, 0x29, 0xd5,
0x3f, 0xc5, 0x35, 0x22, 0x34, 0xff, 0xad, 0x3a,
0xe6, 0xe3, 0x95, 0x06, 0xae, 0x55, 0x82, 0xe3,
0xc8, 0xc7, 0xb4, 0xa8, 0x47, 0xc8, 0x50, 0x71,
0x74, 0x29, 0x53, 0x89, 0x6d, 0x9c, 0xed, 0x70,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x08, 0x00, 0x48, 0x00, 0xa8, 0xf4, 0x31, 0xb9,
0xab, 0x4b, 0xe6, 0xb4, 0xf4, 0x39, 0x89, 0xd6,
0xb1, 0xda, 0xf6, 0x1e, 0xec, 0xb1, 0xf0, 0x54,
0x3b, 0x5e, 0x3e, 0x6a, 0x71, 0xb4, 0xf7, 0x75,
0xc8, 0x16, 0x2f, 0x24, 0x00, 0xde, 0xe9, 0x82,
0x99, 0x5f, 0x33, 0x0b, 0xa9, 0xa6, 0x94, 0xaf,
0xcb, 0x11, 0xc3, 0xf2, 0xdb, 0x09, 0x42, 0x68,
0x29, 0x56, 0x58, 0x01, 0x56, 0xdb, 0x59, 0x03,
0x69, 0xdb, 0x7d, 0x37, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x0e, 0x00, 0x0e, 0x00, 0x6d, 0x69, 0x63, 0x72,
0x6f, 0x73, 0x6f, 0x66, 0x74, 0x2e, 0x63, 0x6f,
0x6d, 0x00
};
/* some compilers need unsigned char to avoid warnings */
static tui8 g_lic2[20] =
{
0x80, 0x00, 0x10, 0x00, 0xff, 0x02, 0x10, 0x00,
0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
0x28, 0x14, 0x00, 0x00
};
/* mce */
/* some compilers need unsigned char to avoid warnings */
static tui8 g_lic3[20] =
{
0x80, 0x02, 0x10, 0x00, 0xff, 0x03, 0x10, 0x00,
0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
0xf3, 0x99, 0x00, 0x00
};
static const tui8 g_fips_reverse_table[256] =
{
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};
static const tui8 g_fips_oddparity_table[256] =
{
0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07,
0x08, 0x08, 0x0b, 0x0b, 0x0d, 0x0d, 0x0e, 0x0e,
0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16,
0x19, 0x19, 0x1a, 0x1a, 0x1c, 0x1c, 0x1f, 0x1f,
0x20, 0x20, 0x23, 0x23, 0x25, 0x25, 0x26, 0x26,
0x29, 0x29, 0x2a, 0x2a, 0x2c, 0x2c, 0x2f, 0x2f,
0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37,
0x38, 0x38, 0x3b, 0x3b, 0x3d, 0x3d, 0x3e, 0x3e,
0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46,
0x49, 0x49, 0x4a, 0x4a, 0x4c, 0x4c, 0x4f, 0x4f,
0x51, 0x51, 0x52, 0x52, 0x54, 0x54, 0x57, 0x57,
0x58, 0x58, 0x5b, 0x5b, 0x5d, 0x5d, 0x5e, 0x5e,
0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67,
0x68, 0x68, 0x6b, 0x6b, 0x6d, 0x6d, 0x6e, 0x6e,
0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76,
0x79, 0x79, 0x7a, 0x7a, 0x7c, 0x7c, 0x7f, 0x7f,
0x80, 0x80, 0x83, 0x83, 0x85, 0x85, 0x86, 0x86,
0x89, 0x89, 0x8a, 0x8a, 0x8c, 0x8c, 0x8f, 0x8f,
0x91, 0x91, 0x92, 0x92, 0x94, 0x94, 0x97, 0x97,
0x98, 0x98, 0x9b, 0x9b, 0x9d, 0x9d, 0x9e, 0x9e,
0xa1, 0xa1, 0xa2, 0xa2, 0xa4, 0xa4, 0xa7, 0xa7,
0xa8, 0xa8, 0xab, 0xab, 0xad, 0xad, 0xae, 0xae,
0xb0, 0xb0, 0xb3, 0xb3, 0xb5, 0xb5, 0xb6, 0xb6,
0xb9, 0xb9, 0xba, 0xba, 0xbc, 0xbc, 0xbf, 0xbf,
0xc1, 0xc1, 0xc2, 0xc2, 0xc4, 0xc4, 0xc7, 0xc7,
0xc8, 0xc8, 0xcb, 0xcb, 0xcd, 0xcd, 0xce, 0xce,
0xd0, 0xd0, 0xd3, 0xd3, 0xd5, 0xd5, 0xd6, 0xd6,
0xd9, 0xd9, 0xda, 0xda, 0xdc, 0xdc, 0xdf, 0xdf,
0xe0, 0xe0, 0xe3, 0xe3, 0xe5, 0xe5, 0xe6, 0xe6,
0xe9, 0xe9, 0xea, 0xea, 0xec, 0xec, 0xef, 0xef,
0xf1, 0xf1, 0xf2, 0xf2, 0xf4, 0xf4, 0xf7, 0xf7,
0xf8, 0xf8, 0xfb, 0xfb, 0xfd, 0xfd, 0xfe, 0xfe
};
static const tui8 g_fips_ivec[8] =
{
0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF
};
/*****************************************************************************/
static void
hex_str_to_bin(char *in, char *out, int out_len)
{
int in_index;
int in_len;
int out_index;
int val;
char hex[16];
in_len = g_strlen(in);
out_index = 0;
in_index = 0;
while (in_index <= (in_len - 4))
{
if ((in[in_index] == '0') && (in[in_index + 1] == 'x'))
{
hex[0] = in[in_index + 2];
hex[1] = in[in_index + 3];
hex[2] = 0;
if (out_index < out_len)
{
val = g_htoi(hex);
out[out_index] = val;
}
out_index++;
}
in_index++;
}
}
/*****************************************************************************/
static void
xrdp_load_keyboard_layout(struct xrdp_client_info *client_info)
{
int fd;
int index = 0;
int bytes;
struct list *names = (struct list *)NULL;
struct list *items = (struct list *)NULL;
struct list *values = (struct list *)NULL;
char *item = (char *)NULL;
char *value = (char *)NULL;
char *q = (char *)NULL;
char keyboard_cfg_file[256] = { 0 };
char rdp_layout[256] = { 0 };
LLOGLN(0, ("xrdp_load_keyboard_layout: keyboard_type [%d] keyboard_subtype [%d]",
client_info->keyboard_type, client_info->keyboard_subtype));
/* infer model/variant */
/* TODO specify different X11 keyboard models/variants */
g_memset(client_info->model, 0, sizeof(client_info->model));
g_memset(client_info->variant, 0, sizeof(client_info->variant));
g_strncpy(client_info->layout, "us", sizeof(client_info->layout) - 1);
if (client_info->keyboard_subtype == 3)
{
/* macintosh keyboard */
bytes = sizeof(client_info->variant);
g_strncpy(client_info->variant, "mac", bytes - 1);
}
else if (client_info->keyboard_subtype == 0)
{
/* default - standard subtype */
client_info->keyboard_subtype = 1;
}
g_snprintf(keyboard_cfg_file, 255, "%s/xrdp_keyboard.ini", XRDP_CFG_PATH);
LLOGLN(10, ("keyboard_cfg_file %s", keyboard_cfg_file));
fd = g_file_open(keyboard_cfg_file);
if (fd >= 0)
{
int section_found = -1;
char section_rdp_layouts[256] = { 0 };
char section_layouts_map[256] = { 0 };
names = list_create();
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;
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 if (g_strcasecmp(item, "options") == 0)
{
if (section_found != -1 && section_found == index)
{
bytes = sizeof(client_info->options);
g_memset(client_info->options, 0, bytes);
g_strncpy(client_info->options, 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] options [%s]", client_info->model,
client_info->variant, client_info->layout, client_info->options));
g_file_close(fd);
}
else
{
LLOGLN(0, ("xrdp_load_keyboard_layout: error opening %s",
keyboard_cfg_file));
}
}
/*****************************************************************************/
struct xrdp_sec *
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
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
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_NONE) /* RDP encryption */
{
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 if (self->crypt_level)
{
s_push_layer(s, sec_hdr, 4);
}
}
return 0;
}
/*****************************************************************************/
/* Reduce key entropy from 64 to 40 bits */
static void
xrdp_sec_make_40bit(char *key)
{
key[0] = 0xd1;
key[1] = 0x26;
key[2] = 0x9e;
}
/*****************************************************************************/
/* returns error */
/* update an encryption key */
static int
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
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
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
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
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++;
}
/*****************************************************************************
* convert utf-16 encoded string from stream into utf-8 string.
* note: src_bytes doesn't include the null-terminator char.
*/
static int
unicode_utf16_in(struct stream *s, int src_bytes, char *dst, int dst_len)
{
twchar *src;
int num_chars;
int i;
int bytes;
LLOGLN(10, ("unicode_utf16_in: uni_len %d, dst_len %d", src_bytes, dst_len));
if (src_bytes == 0)
{
if (!s_check_rem(s, 2))
{
return 1;
}
in_uint8s(s, 2); /* null terminator */
return 0;
}
bytes = src_bytes + 2; /* include the null terminator */
src = g_new0(twchar, bytes);
for (i = 0; i < bytes / 2; ++i)
{
if (!s_check_rem(s, 2))
{
g_free(src);
return 1;
}
in_uint16_le(s, src[i]);
}
num_chars = g_wcstombs(dst, src, dst_len);
if (num_chars < 0)
{
g_memset(dst, '\0', dst_len);
}
LLOGLN(10, ("unicode_utf16_in: num_chars %d, dst %s", num_chars, dst));
g_free(src);
return 0;
}
/*****************************************************************************/
/* returns error */
static int
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;
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_utf16_in(s, len_domain, self->rdp_layer->client_info.domain, sizeof(self->rdp_layer->client_info.domain) - 1) != 0)
{
return 1;
}
DEBUG(("domain %s", self->rdp_layer->client_info.domain));
if (unicode_utf16_in(s, len_user, self->rdp_layer->client_info.username, sizeof(self->rdp_layer->client_info.username) - 1) != 0)
{
return 1;
}
DEBUG(("username %s", self->rdp_layer->client_info.username));
if (flags & RDP_LOGON_AUTO)
{
if (unicode_utf16_in(s, len_password, self->rdp_layer->client_info.password, sizeof(self->rdp_layer->client_info.password) - 1) != 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_utf16_in(s, len_program, self->rdp_layer->client_info.program, sizeof(self->rdp_layer->client_info.program) - 1) != 0)
{
return 1;
}
DEBUG(("program %s", self->rdp_layer->client_info.program));
if (unicode_utf16_in(s, len_directory, self->rdp_layer->client_info.directory, sizeof(self->rdp_layer->client_info.directory) - 1) != 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_utf16_in(s, len_ip - 2, tmpdata, sizeof(tmpdata) - 1) != 0)
{
return 1;
}
if (!s_check_rem(s, 2))
{
return 1;
}
in_uint16_le(s, len_dll);
if (unicode_utf16_in(s, len_dll - 2, tmpdata, sizeof(tmpdata) - 1) != 0)
{
return 1;
}
if (!s_check_rem(s, 4 + 62 + 22 + 62 + 26 + 4))
{
return 1;
}
in_uint8s(s, 4); /* 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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_NONE)
{
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
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
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
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
xrdp_sec_process_mcs_data_CS_CORE(struct xrdp_sec* self, struct stream* s)
{
int colorDepth;
int postBeta2ColorDepth;
int highColorDepth;
int supportedColorDepths;
int earlyCapabilityFlags;
char clientName[INFO_CLIENT_NAME_BYTES / 2] = { '\0' };
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 RNS_UD_COLOR_4BPP:
self->rdp_layer->client_info.bpp = 4;
break;
case 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 */
unicode_utf16_in(s, INFO_CLIENT_NAME_BYTES - 2, clientName, sizeof(clientName) - 1); /* clientName */
log_message(LOG_LEVEL_INFO, "connected client computer name: %s", 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 RNS_UD_COLOR_4BPP:
self->rdp_layer->client_info.bpp = 4;
break;
case RNS_UD_COLOR_8BPP :
self->rdp_layer->client_info.bpp = 8;
break;
case RNS_UD_COLOR_16BPP_555:
self->rdp_layer->client_info.bpp = 15;
break;
case RNS_UD_COLOR_16BPP_565:
self->rdp_layer->client_info.bpp = 16;
break;
case 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
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
xrdp_sec_process_mcs_data_channels(struct xrdp_sec *self, struct stream *s)
{
int num_channels;
int index;
struct xrdp_client_info *client_info;
struct mcs_channel_item *channel_item;
client_info = &(self->rdp_layer->client_info);
DEBUG(("processing channels, channels_allowed is %d",
client_info->channels_allowed));
/* this is an option set in xrdp.ini */
if (client_info->channels_allowed == 0) /* are channels on? */
{
log_message(LOG_LEVEL_INFO, "all channels are disabled by "
"configuration");
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++)
{
channel_item = g_new0(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);
if (g_strlen(channel_item->name) > 0)
{
channel_item->chanid = MCS_GLOBAL_CHANNEL + (index + 1);
log_message(LOG_LEVEL_INFO, "adding channel item name %s chan_id "
"%d flags 0x%8.8x", channel_item->name,
channel_item->chanid, channel_item->flags);
list_add_item(self->mcs_layer->channel_list,
(intptr_t) channel_item);
DEBUG(("got channel flags %8.8x name %s", channel_item->flags,
channel_item->name));
}
else
{
g_free(channel_item);
}
}
return 0;
}
/*****************************************************************************/
/* reads the client monitors data */
static int
xrdp_sec_process_mcs_data_monitors(struct xrdp_sec *self, struct stream *s)
{
int index;
int monitorCount;
int flags;
int x1;
int y1;
int x2;
int y2;
int got_primary;
struct xrdp_client_info *client_info = (struct xrdp_client_info *)NULL;
client_info = &(self->rdp_layer->client_info);
LLOGLN(10, ("xrdp_sec_process_mcs_data_monitors: 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 ? */
{
LLOGLN(0, ("[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)
{
LLOGLN(0, ("[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)
{
LLOGLN(0, ("[ERROR] xrdp_sec_process_mcs_data_monitors: max allowed "
"monitors is 16, detected: %d", monitorCount));
return 1;
}
LLOGLN(10, ("xrdp_sec_process_mcs_data_monitors: monitorCount= %d", monitorCount));
client_info->monitorCount = monitorCount;
x1 = 0;
y1 = 0;
x2 = 0;
y2 = 0;
got_primary = 0;
/* 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);
if (index == 0)
{
x1 = client_info->minfo[index].left;
y1 = client_info->minfo[index].top;
x2 = client_info->minfo[index].right;
y2 = client_info->minfo[index].bottom;
}
else
{
x1 = MIN(x1, client_info->minfo[index].left);
y1 = MIN(y1, client_info->minfo[index].top);
x2 = MAX(x2, client_info->minfo[index].right);
y2 = MAX(y2, client_info->minfo[index].bottom);
}
if (client_info->minfo[index].is_primary)
{
got_primary = 1;
}
LLOGLN(10, ("xrdp_sec_process_mcs_data_monitors: got a monitor [%d]: left= %d, top= %d, right= %d, bottom= %d, is_primary?= %d",
index,
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));
}
if (!got_primary)
{
/* no primary monitor was set, choose the leftmost monitor as primary */
for (index = 0; index < monitorCount; index++)
{
if (client_info->minfo[index].left == x1 &&
client_info->minfo[index].top == y1)
{
client_info->minfo[index].is_primary = 1;
break;
}
}
}
/* set wm geometry */
if ((x2 > x1) && (y2 > y1))
{
client_info->width = (x2 - x1) + 1;
client_info->height = (y2 - y1) + 1;
}
/* make sure virtual desktop size is ok */
if (client_info->width > 0x7FFE || client_info->width < 0xC8 ||
client_info->height > 0x7FFE || client_info->height < 0xC8)
{
LLOGLN(0, ("[ERROR] xrdp_sec_process_mcs_data_monitors: error, virtual desktop width / height is too large"));
return 1; /* error */
}
/* keep a copy of non negative monitor info values for xrdp_wm usage */
for (index = 0; index < monitorCount; index++)
{
client_info->minfo_wm[index].left = client_info->minfo[index].left - x1;
client_info->minfo_wm[index].top = client_info->minfo[index].top - y1;
client_info->minfo_wm[index].right = client_info->minfo[index].right - x1;
client_info->minfo_wm[index].bottom = client_info->minfo[index].bottom - y1;
client_info->minfo_wm[index].is_primary = 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
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
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, it's 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
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
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->selectedProtocol > 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,
self->rdp_layer->client_info.ssl_protocols,
self->rdp_layer->client_info.tls_ciphers) != 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);
}
}
if (self->rsa_key_bytes <= 64)
{
g_writeln("warning, RSA key len 512 "
"bits or less, consider creating a 2048 bit key");
log_message(LOG_LEVEL_WARNING, "warning, RSA key len 512 "
"bits or less, consider creating a 2048 bit key");
}
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
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;
}
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