1 |
/* |
/* |
2 |
rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
3 |
RDP licensing negotiation |
RDP licensing negotiation |
4 |
Copyright (C) Matthew Chapman 1999-2001 |
Copyright (C) Matthew Chapman 1999-2002 |
5 |
|
|
6 |
This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
7 |
it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
19 |
*/ |
*/ |
20 |
|
|
21 |
#include "rdesktop.h" |
#include "rdesktop.h" |
22 |
|
|
23 |
|
#ifdef WITH_OPENSSL |
24 |
|
#include <openssl/rc4.h> |
25 |
|
#else |
26 |
#include "crypto/rc4.h" |
#include "crypto/rc4.h" |
27 |
|
#endif |
28 |
|
|
29 |
extern char username[16]; |
extern char username[16]; |
30 |
extern char hostname[16]; |
extern char hostname[16]; |
|
extern BOOL licence; |
|
31 |
|
|
32 |
static uint8 licence_key[16]; |
static uint8 licence_key[16]; |
33 |
static uint8 licence_sign_key[16]; |
static uint8 licence_sign_key[16]; |
141 |
licence_process_demand(STREAM s) |
licence_process_demand(STREAM s) |
142 |
{ |
{ |
143 |
uint8 null_data[SEC_MODULUS_SIZE]; |
uint8 null_data[SEC_MODULUS_SIZE]; |
|
uint8 hwid[LICENCE_HWID_SIZE]; |
|
|
uint8 signature[LICENCE_SIGNATURE_SIZE]; |
|
144 |
uint8 *server_random; |
uint8 *server_random; |
145 |
|
uint8 signature[LICENCE_SIGNATURE_SIZE]; |
146 |
|
uint8 hwid[LICENCE_HWID_SIZE]; |
147 |
uint8 *licence_data; |
uint8 *licence_data; |
148 |
int licence_size; |
int licence_size; |
149 |
RC4_KEY crypt_key; |
RC4_KEY crypt_key; |
157 |
licence_generate_keys(null_data, server_random, null_data); |
licence_generate_keys(null_data, server_random, null_data); |
158 |
|
|
159 |
licence_size = load_licence(&licence_data); |
licence_size = load_licence(&licence_data); |
160 |
if (licence_size == -1) |
if (licence_size != -1) |
161 |
{ |
{ |
162 |
licence_send_request(null_data, null_data, username, hostname); |
/* Generate a signature for the HWID buffer */ |
163 |
|
licence_generate_hwid(hwid); |
164 |
|
sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid)); |
165 |
|
|
166 |
|
/* Now encrypt the HWID */ |
167 |
|
RC4_set_key(&crypt_key, 16, licence_key); |
168 |
|
RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
169 |
|
|
170 |
|
licence_present(null_data, null_data, licence_data, licence_size, hwid, signature); |
171 |
|
xfree(licence_data); |
172 |
return; |
return; |
173 |
} |
} |
174 |
|
|
175 |
/* Generate a signature for the HWID buffer */ |
licence_send_request(null_data, null_data, username, hostname); |
|
licence_generate_hwid(hwid); |
|
|
sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid)); |
|
|
|
|
|
/* Now encrypt the HWID */ |
|
|
RC4_set_key(&crypt_key, 16, licence_key); |
|
|
RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
|
|
|
|
|
licence_present(null_data, null_data, licence_data, licence_size, hwid, signature); |
|
|
xfree(licence_data); |
|
176 |
} |
} |
177 |
|
|
178 |
/* Send an authentication response packet */ |
/* Send an authentication response packet */ |
248 |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
249 |
sec_sign(out_sig, 16, licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer)); |
sec_sign(out_sig, 16, licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer)); |
250 |
|
|
|
/* Deliberately break signature if licencing disabled */ |
|
|
if (!licence) |
|
|
memset(out_sig, 0, sizeof(out_sig)); |
|
|
|
|
251 |
/* Now encrypt the HWID */ |
/* Now encrypt the HWID */ |
252 |
RC4_set_key(&crypt_key, 16, licence_key); |
RC4_set_key(&crypt_key, 16, licence_key); |
253 |
RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid); |
RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid); |