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g_ prefix for global vars

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git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@1388 423420c4-83ab-492f-b58f-81f9feb106b5
This commit is contained in:
Jay Sorg 2007-02-10 05:15:58 +00:00
parent d7b4edd58c
commit d3349e6087
1 changed files with 55 additions and 56 deletions
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111
secure.c
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@ -33,27 +33,26 @@ extern RD_BOOL g_licence_issued;
extern RD_BOOL g_use_rdp5;
extern RD_BOOL g_console_session;
extern int g_server_depth;
extern uint16 mcs_userid;
extern VCHANNEL g_channels[];
extern unsigned int g_num_channels;
static int rc4_key_len;
static SSL_RC4 rc4_decrypt_key;
static SSL_RC4 rc4_encrypt_key;
static uint32 server_public_key_len;
static int g_rc4_key_len;
static SSL_RC4 g_rc4_decrypt_key;
static SSL_RC4 g_rc4_encrypt_key;
static uint32 g_server_public_key_len;
static uint8 sec_sign_key[16];
static uint8 sec_decrypt_key[16];
static uint8 sec_encrypt_key[16];
static uint8 sec_decrypt_update_key[16];
static uint8 sec_encrypt_update_key[16];
static uint8 sec_crypted_random[SEC_MAX_MODULUS_SIZE];
static uint8 g_sec_sign_key[16];
static uint8 g_sec_decrypt_key[16];
static uint8 g_sec_encrypt_key[16];
static uint8 g_sec_decrypt_update_key[16];
static uint8 g_sec_encrypt_update_key[16];
static uint8 g_sec_crypted_random[SEC_MAX_MODULUS_SIZE];
uint16 g_server_rdp_version = 0;
/* These values must be available to reset state - Session Directory */
static int sec_encrypt_use_count = 0;
static int sec_decrypt_use_count = 0;
static int g_sec_encrypt_use_count = 0;
static int g_sec_decrypt_use_count = 0;
/*
* I believe this is based on SSLv3 with the following differences:
@ -137,33 +136,33 @@ sec_generate_keys(uint8 * client_random, uint8 * server_random, int rc4_key_size
sec_hash_48(key_block, master_secret, client_random, server_random, 'X');
/* First 16 bytes of key material is MAC secret */
memcpy(sec_sign_key, key_block, 16);
memcpy(g_sec_sign_key, key_block, 16);
/* Generate export keys from next two blocks of 16 bytes */
sec_hash_16(sec_decrypt_key, &key_block[16], client_random, server_random);
sec_hash_16(sec_encrypt_key, &key_block[32], client_random, server_random);
sec_hash_16(g_sec_decrypt_key, &key_block[16], client_random, server_random);
sec_hash_16(g_sec_encrypt_key, &key_block[32], client_random, server_random);
if (rc4_key_size == 1)
{
DEBUG(("40-bit encryption enabled\n"));
sec_make_40bit(sec_sign_key);
sec_make_40bit(sec_decrypt_key);
sec_make_40bit(sec_encrypt_key);
rc4_key_len = 8;
sec_make_40bit(g_sec_sign_key);
sec_make_40bit(g_sec_decrypt_key);
sec_make_40bit(g_sec_encrypt_key);
g_rc4_key_len = 8;
}
else
{
DEBUG(("rc_4_key_size == %d, 128-bit encryption enabled\n", rc4_key_size));
rc4_key_len = 16;
g_rc4_key_len = 16;
}
/* Save initial RC4 keys as update keys */
memcpy(sec_decrypt_update_key, sec_decrypt_key, 16);
memcpy(sec_encrypt_update_key, sec_encrypt_key, 16);
memcpy(g_sec_decrypt_update_key, g_sec_decrypt_key, 16);
memcpy(g_sec_encrypt_update_key, g_sec_encrypt_key, 16);
/* Initialise RC4 state arrays */
ssl_rc4_set_key(&rc4_decrypt_key, sec_decrypt_key, rc4_key_len);
ssl_rc4_set_key(&rc4_encrypt_key, sec_encrypt_key, rc4_key_len);
ssl_rc4_set_key(&g_rc4_decrypt_key, g_sec_decrypt_key, g_rc4_key_len);
ssl_rc4_set_key(&g_rc4_encrypt_key, g_sec_encrypt_key, g_rc4_key_len);
}
static uint8 pad_54[40] = {
@ -228,21 +227,21 @@ sec_update(uint8 * key, uint8 * update_key)
SSL_RC4 update;
ssl_sha1_init(&sha1);
ssl_sha1_update(&sha1, update_key, rc4_key_len);
ssl_sha1_update(&sha1, update_key, g_rc4_key_len);
ssl_sha1_update(&sha1, pad_54, 40);
ssl_sha1_update(&sha1, key, rc4_key_len);
ssl_sha1_update(&sha1, key, g_rc4_key_len);
ssl_sha1_final(&sha1, shasig);
ssl_md5_init(&md5);
ssl_md5_update(&md5, update_key, rc4_key_len);
ssl_md5_update(&md5, update_key, g_rc4_key_len);
ssl_md5_update(&md5, pad_92, 48);
ssl_md5_update(&md5, shasig, 20);
ssl_md5_final(&md5, key);
ssl_rc4_set_key(&update, key, rc4_key_len);
ssl_rc4_crypt(&update, key, key, rc4_key_len);
ssl_rc4_set_key(&update, key, g_rc4_key_len);
ssl_rc4_crypt(&update, key, key, g_rc4_key_len);
if (rc4_key_len == 8)
if (g_rc4_key_len == 8)
sec_make_40bit(key);
}
@ -250,30 +249,30 @@ sec_update(uint8 * key, uint8 * update_key)
static void
sec_encrypt(uint8 * data, int length)
{
if (sec_encrypt_use_count == 4096)
if (g_sec_encrypt_use_count == 4096)
{
sec_update(sec_encrypt_key, sec_encrypt_update_key);
ssl_rc4_set_key(&rc4_encrypt_key, sec_encrypt_key, rc4_key_len);
sec_encrypt_use_count = 0;
sec_update(g_sec_encrypt_key, g_sec_encrypt_update_key);
ssl_rc4_set_key(&g_rc4_encrypt_key, g_sec_encrypt_key, g_rc4_key_len);
g_sec_encrypt_use_count = 0;
}
ssl_rc4_crypt(&rc4_encrypt_key, data, data, length);
sec_encrypt_use_count++;
ssl_rc4_crypt(&g_rc4_encrypt_key, data, data, length);
g_sec_encrypt_use_count++;
}
/* Decrypt data using RC4 */
void
sec_decrypt(uint8 * data, int length)
{
if (sec_decrypt_use_count == 4096)
if (g_sec_decrypt_use_count == 4096)
{
sec_update(sec_decrypt_key, sec_decrypt_update_key);
ssl_rc4_set_key(&rc4_decrypt_key, sec_decrypt_key, rc4_key_len);
sec_decrypt_use_count = 0;
sec_update(g_sec_decrypt_key, g_sec_decrypt_update_key);
ssl_rc4_set_key(&g_rc4_decrypt_key, g_sec_decrypt_key, g_rc4_key_len);
g_sec_decrypt_use_count = 0;
}
ssl_rc4_crypt(&rc4_decrypt_key, data, data, length);
sec_decrypt_use_count++;
ssl_rc4_crypt(&g_rc4_decrypt_key, data, data, length);
g_sec_decrypt_use_count++;
}
/* Perform an RSA public key encryption operation */
@ -325,7 +324,7 @@ sec_send_to_channel(STREAM s, uint32 flags, uint16 channel)
hexdump(s->p + 8, datalen);
#endif
sec_sign(s->p, 8, sec_sign_key, rc4_key_len, s->p + 8, datalen);
sec_sign(s->p, 8, g_sec_sign_key, g_rc4_key_len, s->p + 8, datalen);
sec_encrypt(s->p + 8, datalen);
}
@ -349,14 +348,14 @@ sec_send(STREAM s, uint32 flags)
static void
sec_establish_key(void)
{
uint32 length = server_public_key_len + SEC_PADDING_SIZE;
uint32 length = g_server_public_key_len + SEC_PADDING_SIZE;
uint32 flags = SEC_CLIENT_RANDOM;
STREAM s;
s = sec_init(flags, length + 4);
out_uint32_le(s, length);
out_uint8p(s, sec_crypted_random, server_public_key_len);
out_uint8p(s, g_sec_crypted_random, g_server_public_key_len);
out_uint8s(s, SEC_PADDING_SIZE);
s_mark_end(s);
@ -479,7 +478,7 @@ sec_parse_public_key(STREAM s, uint8 * modulus, uint8 * exponent)
in_uint8a(s, exponent, SEC_EXPONENT_SIZE);
in_uint8a(s, modulus, modulus_len);
in_uint8s(s, SEC_PADDING_SIZE);
server_public_key_len = modulus_len;
g_server_public_key_len = modulus_len;
return s_check(s);
}
@ -498,7 +497,7 @@ sec_parse_public_sig(STREAM s, uint32 len, uint8 * modulus, uint8 * exponent)
memset(signature, 0, sizeof(signature));
sig_len = len - 8;
in_uint8a(s, signature, sig_len);
return ssl_sig_ok(exponent, SEC_EXPONENT_SIZE, modulus, server_public_key_len,
return ssl_sig_ok(exponent, SEC_EXPONENT_SIZE, modulus, g_server_public_key_len,
signature, sig_len);
}
@ -635,7 +634,7 @@ sec_parse_crypt_info(STREAM s, uint32 * rc4_key_size,
}
ssl_cert_free(cacert);
in_uint8s(s, 16); /* Padding */
server_public_key = ssl_cert_to_rkey(server_cert, &server_public_key_len);
server_public_key = ssl_cert_to_rkey(server_cert, &g_server_public_key_len);
if (NULL == server_public_key)
{
DEBUG_RDP5(("Didn't parse X509 correctly\n"));
@ -643,10 +642,10 @@ sec_parse_crypt_info(STREAM s, uint32 * rc4_key_size,
return False;
}
ssl_cert_free(server_cert);
if ((server_public_key_len < SEC_MODULUS_SIZE) ||
(server_public_key_len > SEC_MAX_MODULUS_SIZE))
if ((g_server_public_key_len < SEC_MODULUS_SIZE) ||
(g_server_public_key_len > SEC_MAX_MODULUS_SIZE))
{
error("Bad server public key size (%u bits)\n", server_public_key_len * 8);
error("Bad server public key size (%u bits)\n", g_server_public_key_len * 8);
ssl_rkey_free(server_public_key);
return False;
}
@ -682,8 +681,8 @@ sec_process_crypt_info(STREAM s)
}
DEBUG(("Generating client random\n"));
generate_random(client_random);
sec_rsa_encrypt(sec_crypted_random, client_random, SEC_RANDOM_SIZE,
server_public_key_len, modulus, exponent);
sec_rsa_encrypt(g_sec_crypted_random, client_random, SEC_RANDOM_SIZE,
g_server_public_key_len, modulus, exponent);
sec_generate_keys(client_random, server_random, rc4_key_size);
}
@ -890,7 +889,7 @@ void
sec_reset_state(void)
{
g_server_rdp_version = 0;
sec_encrypt_use_count = 0;
sec_decrypt_use_count = 0;
g_sec_encrypt_use_count = 0;
g_sec_decrypt_use_count = 0;
mcs_reset_state();
}