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/* |
/* |
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rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
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RDP licensing negotiation |
RDP licensing negotiation |
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Copyright (C) Matthew Chapman 1999-2001 |
Copyright (C) Matthew Chapman 1999-2002 |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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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 |
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*/ |
*/ |
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#include "rdesktop.h" |
#include "rdesktop.h" |
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#ifdef WITH_OPENSSL |
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#include <openssl/rc4.h> |
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#else |
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#include "crypto/rc4.h" |
#include "crypto/rc4.h" |
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#endif |
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extern char username[16]; |
extern char username[16]; |
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extern char hostname[16]; |
extern char hostname[16]; |
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extern BOOL licence; |
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static uint8 licence_key[16]; |
static uint8 licence_key[16]; |
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static uint8 licence_sign_key[16]; |
static uint8 licence_sign_key[16]; |
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strncpy((char *) (hwid + 4), hostname, LICENCE_HWID_SIZE - 4); |
strncpy((char *) (hwid + 4), hostname, LICENCE_HWID_SIZE - 4); |
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} |
} |
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#ifdef SAVE_LICENCE |
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/* Present an existing licence to the server */ |
/* Present an existing licence to the server */ |
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static void |
static void |
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licence_present(uint8 * client_random, uint8 * rsa_data, |
licence_present(uint8 * client_random, uint8 * rsa_data, |
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s_mark_end(s); |
s_mark_end(s); |
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sec_send(s, sec_flags); |
sec_send(s, sec_flags); |
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} |
} |
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#endif |
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/* Send a licence request packet */ |
/* Send a licence request packet */ |
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static void |
static void |
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licence_process_demand(STREAM s) |
licence_process_demand(STREAM s) |
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{ |
{ |
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uint8 null_data[SEC_MODULUS_SIZE]; |
uint8 null_data[SEC_MODULUS_SIZE]; |
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uint8 hwid[LICENCE_HWID_SIZE]; |
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uint8 signature[LICENCE_SIGNATURE_SIZE]; |
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uint8 *server_random; |
uint8 *server_random; |
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#ifdef SAVE_LICENCE |
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uint8 signature[LICENCE_SIGNATURE_SIZE]; |
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uint8 hwid[LICENCE_HWID_SIZE]; |
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uint8 *licence_data; |
uint8 *licence_data; |
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int licence_size; |
int licence_size; |
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RC4_KEY crypt_key; |
RC4_KEY crypt_key; |
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#endif |
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/* Retrieve the server random from the incoming packet */ |
/* Retrieve the server random from the incoming packet */ |
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in_uint8p(s, server_random, SEC_RANDOM_SIZE); |
in_uint8p(s, server_random, SEC_RANDOM_SIZE); |
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memset(null_data, 0, sizeof(null_data)); |
memset(null_data, 0, sizeof(null_data)); |
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licence_generate_keys(null_data, server_random, null_data); |
licence_generate_keys(null_data, server_random, null_data); |
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#ifdef SAVE_LICENCE |
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licence_size = load_licence(&licence_data); |
licence_size = load_licence(&licence_data); |
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if (licence_size == -1) |
if (licence_size != -1) |
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{ |
{ |
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licence_send_request(null_data, null_data, username, hostname); |
/* Generate a signature for the HWID buffer */ |
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licence_generate_hwid(hwid); |
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sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid)); |
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/* Now encrypt the HWID */ |
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RC4_set_key(&crypt_key, 16, licence_key); |
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RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
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licence_present(null_data, null_data, licence_data, licence_size, hwid, signature); |
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xfree(licence_data); |
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return; |
return; |
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} |
} |
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#endif |
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/* Generate a signature for the HWID buffer */ |
licence_send_request(null_data, null_data, username, hostname); |
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licence_generate_hwid(hwid); |
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sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid)); |
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/* Now encrypt the HWID */ |
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RC4_set_key(&crypt_key, 16, licence_key); |
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RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
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licence_present(null_data, null_data, licence_data, licence_size, hwid, signature); |
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xfree(licence_data); |
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} |
} |
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/* Send an authentication response packet */ |
/* Send an authentication response packet */ |
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memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
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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)); |
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/* Deliberately break signature if licencing disabled */ |
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if (!licence) |
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memset(out_sig, 0, sizeof(out_sig)); |
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/* Now encrypt the HWID */ |
/* Now encrypt the HWID */ |
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RC4_set_key(&crypt_key, 16, licence_key); |
RC4_set_key(&crypt_key, 16, licence_key); |
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RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid); |
RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid); |
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return; |
return; |
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licence_issued = True; |
licence_issued = True; |
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#ifdef SAVE_LICENCE |
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save_licence(s->p, length - 2); |
save_licence(s->p, length - 2); |
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#endif |
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} |
} |
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/* Process a licence packet */ |
/* Process a licence packet */ |