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module-gbox-helper.c
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module-gbox-helper.c
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#define MODULE_LOG_PREFIX "gbox"
#include "globals.h"
#ifdef MODULE_GBOX
#include "minilzo/minilzo.h"
#include "oscam-string.h"
uint16_t gbox_get_caid(uint32_t caprovid)
{
if ((caprovid >> 24) == 0x05)
{ return 0x0500; }
else
{ return caprovid >> 16; }
}
uint32_t gbox_get_provid(uint32_t caprovid)
{
uint32_t provid = 0;
switch(caprovid >> 24)
{
//ViXS
case 0x05:
provid = caprovid & 0xFFFFFF;
break;
//Cryptoworx
case 0x0D:
provid = (caprovid >> 8) & 0xFF;
break;
default:
provid = caprovid & 0xFFFF;
break;
}
return provid;
}
uint32_t gbox_get_caprovid(uint16_t caid, uint32_t prid)
{
uint32_t caprovid = 0;
switch(caid >> 8)
{
// ViXS
case 0x05:
caprovid = (caid >> 8) << 24 | (prid & 0xFFFFFF);
break;
// Cryptoworx
case 0x0D:
caprovid = (caid >> 8) << 24 | (caid & 0xFF) << 16 |
((prid << 8) & 0xFF00);
break;
// N@gr@
case 0x18:
caprovid = (caid >> 8) << 24 | (caid & 0xFF) << 16;
break;
default:
caprovid = (caid >> 8) << 24 | (caid & 0xFF) << 16 |
(prid & 0xFFFF);
break;
}
return caprovid;
}
static void gbox_convert_pw(uchar *password, uint32_t pw)
{
int32_t i;
for(i = 3; i >= 0; i--)
{
password[3 - i] = (pw >> (8 * i)) & 0xff;
}
}
uint32_t gbox_get_checksum(uchar *buf, uint16_t buflen)
{
uint8_t checksum[4];
int32_t counter;
checksum[3] = buf[0];
checksum[2] = buf[1];
checksum[1] = buf[2];
checksum[0] = buf[3];
for(counter = 1; counter < (buflen / 4) - 4; counter++)
{
checksum[3] ^= buf[counter * 4];
checksum[2] ^= buf[counter * 4 + 1];
checksum[1] ^= buf[counter * 4 + 2];
checksum[0] ^= buf[counter * 4 + 3];
}
return checksum[3] << 24 | checksum[2] << 16 | checksum[1] << 8 | checksum[0];
}
////////////////////////////////////////////////////////////////////////////////
// GBOX BUFFER ENCRYPTION/DECRYPTION (thanks to dvbcrypt@gmail.com)
////////////////////////////////////////////////////////////////////////////////
static unsigned char Lookup_Table[0x40] =
{
0x25, 0x38, 0xD4, 0xCD, 0x17, 0x7A, 0x5E, 0x6C, 0x52, 0x42, 0xFE, 0x68, 0xAB, 0x3F, 0xF7, 0xBE,
0x47, 0x57, 0x71, 0xB0, 0x23, 0xC1, 0x26, 0x6C, 0x41, 0xCE, 0x94, 0x37, 0x45, 0x04, 0xA2, 0xEA,
0x07, 0x58, 0x35, 0x55, 0x08, 0x2A, 0x0F, 0xE7, 0xAC, 0x76, 0xF0, 0xC1, 0xE6, 0x09, 0x10, 0xDD,
0xC5, 0x8D, 0x2E, 0xD9, 0x03, 0x9C, 0x3D, 0x2C, 0x4D, 0x41, 0x0C, 0x5E, 0xDE, 0xE4, 0x90, 0xAE
};
static void gbox_encrypt8(unsigned char *buffer, unsigned char *pass)
{
int passcounter;
int bufcounter;
unsigned char temp;
for(passcounter = 0; passcounter < 4; passcounter++)
for(bufcounter = 7; bufcounter >= 0; bufcounter--)
{
temp = pass[3];
pass[3] = (pass[3] / 2) + (pass[2] & 1) * 0x80;
pass[2] = (pass[2] / 2) + (pass[1] & 1) * 0x80;
pass[1] = (pass[1] / 2) + (pass[0] & 1) * 0x80;
pass[0] = (pass[0] / 2) + (temp & 1) * 0x80;
buffer[(bufcounter + 1) & 7] = buffer[(bufcounter + 1) & 7 ] - Lookup_Table[(buffer[bufcounter] >> 2) & 0x3F ];
buffer[(bufcounter + 1) & 7] = Lookup_Table[(buffer[bufcounter] - pass[(bufcounter + 1) & 3]) & 0x3F ] ^ buffer[(bufcounter + 1) & 7 ];
buffer[(bufcounter + 1) & 7] = buffer[(bufcounter + 1) & 7 ] - pass[(bufcounter & 3)];
}
}
static void gbox_decrypt8(unsigned char *buffer, unsigned char *pass)
{
unsigned char temp;
int bufcounter;
int passcounter;
for(passcounter = 3; passcounter >= 0; passcounter--)
for(bufcounter = 0; bufcounter <= 7; bufcounter++)
{
buffer[(bufcounter + 1) & 7] = pass[bufcounter & 3] + buffer[(bufcounter + 1) & 7];
temp = buffer[bufcounter] - pass[(bufcounter + 1) & 3];
buffer[(bufcounter + 1) & 7] = Lookup_Table[temp & 0x3F] ^ buffer[(bufcounter + 1) & 7];
temp = buffer[bufcounter] >> 2;
buffer[(bufcounter + 1) & 7] = Lookup_Table[temp & 0x3F] + buffer[(bufcounter + 1) & 7];
temp = pass[0] & 0x80;
pass[0] = ((pass[1] & 0x80) >> 7) + (pass[0] << 1);
pass[1] = ((pass[2] & 0x80) >> 7) + (pass[1] << 1);
pass[2] = ((pass[3] & 0x80) >> 7) + (pass[2] << 1);
pass[3] = (temp >> 7) + (pass[3] << 1);
}
}
static void gbox_decryptB(unsigned char *buffer, int bufsize, uchar *localkey)
{
int counter;
gbox_encrypt8(&buffer[bufsize - 9], localkey);
gbox_decrypt8(buffer, localkey);
for(counter = bufsize - 2; counter >= 0; counter--)
{ buffer[counter] = buffer[counter + 1] ^ buffer[counter]; }
}
static void gbox_encryptB(unsigned char *buffer, int bufsize, uchar *key)
{
int counter;
for(counter = 0; counter < (bufsize - 1); counter++)
{ buffer[counter] = buffer[counter + 1] ^ buffer[counter]; }
gbox_encrypt8(buffer, key);
gbox_decrypt8(&buffer[bufsize - 9], key);
}
static void gbox_encryptA(unsigned char *buffer, unsigned char *pass)
{
int counter;
unsigned char temp;
for(counter = 0x1F; counter >= 0; counter--)
{
temp = pass[3] & 1;
pass[3] = ((pass[2] & 1) << 7) + (pass[3] >> 1);
pass[2] = ((pass[1] & 1) << 7) + (pass[2] >> 1);
pass[1] = ((pass[0] & 1) << 7) + (pass[1] >> 1);
pass[0] = (temp << 7) + (pass[0] >> 1);
temp = (pass[(counter + 1) & 3] ^ buffer[counter & 7]) >> 2;
buffer[(counter + 1) & 7] = Lookup_Table[temp & 0x3F] * 2 + buffer[(counter + 1) & 7 ];
temp = buffer[counter & 7] - pass[(counter + 1) & 3];
buffer[(counter + 1) & 7] = Lookup_Table[temp & 0x3F] ^ buffer[(counter + 1) & 7];
buffer[(counter + 1) & 7] = pass[counter & 3] + buffer[(counter + 1) & 7];
}
}
static void gbox_decryptA(unsigned char *buffer, unsigned char *pass)
{
int counter;
unsigned char temp;
for(counter = 0; counter <= 0x1F; counter++)
{
buffer[(counter + 1) & 7] = buffer[(counter + 1) & 7] - pass[counter & 3];
temp = buffer[counter & 7] - pass[(counter + 1) & 3];
buffer[(counter + 1) & 7] = Lookup_Table[temp & 0x3F] ^ buffer[(counter + 1) & 7];
temp = (pass[(counter + 1) & 3] ^ buffer[counter & 7]) >> 2;
buffer[(counter + 1) & 7] = buffer[(counter + 1) & 7] - Lookup_Table[temp & 0x3F] * 2;
temp = pass[0] & 0x80;
pass[0] = ((pass[1] & 0x80) >> 7) + (pass[0] << 1);
pass[1] = ((pass[2] & 0x80) >> 7) + (pass[1] << 1);
pass[2] = ((pass[3] & 0x80) >> 7) + (pass[2] << 1);
pass[3] = (temp >> 7) + (pass[3] << 1);
}
}
void gbox_encrypt(uchar *buffer, int bufsize, uint32_t key)
{
uchar pass[4];
gbox_convert_pw(&pass[0], key);
gbox_encryptA(buffer, &pass[0]);
gbox_encryptB(buffer, bufsize, &pass[0]);
}
void gbox_decrypt(uchar *buffer, int bufsize, uint32_t localkey)
{
uchar pass[4];
gbox_convert_pw(&pass[0], localkey);
gbox_decryptB(buffer, bufsize, &pass[0]);
gbox_decryptA(buffer, &pass[0]);
}
void gbox_compress(uchar *buf, int32_t unpacked_len, int32_t *packed_len)
{
unsigned char *tmp, *tmp2;
lzo_voidp wrkmem;
if(!cs_malloc(&tmp, 0x40000))
{
return;
}
if(!cs_malloc(&tmp2, 0x40000))
{
NULLFREE(tmp);
return;
}
if(!cs_malloc(&wrkmem, unpacked_len * 0x1000))
{
NULLFREE(tmp);
NULLFREE(tmp2);
return;
}
unpacked_len -= 12;
memcpy(tmp2, buf + 12, unpacked_len);
lzo_init();
lzo_uint pl = 0;
if(lzo1x_1_compress(tmp2, unpacked_len, tmp, &pl, wrkmem) != LZO_E_OK)
{ cs_log("compression failed!"); }
memcpy(buf + 12, tmp, pl);
pl += 12;
NULLFREE(tmp);
NULLFREE(tmp2);
NULLFREE(wrkmem);
*packed_len = pl;
}
void gbox_decompress(uchar *buf, int32_t *unpacked_len)
{
uchar *tmp;
if(!cs_malloc(&tmp, 0x40000))
{ return; }
int err;
int len = *unpacked_len - 12;
*unpacked_len = 0x40000;
lzo_init();
cs_log_dbg(D_READER, "-> data decompressing %d bytes", len);
if((err = lzo1x_decompress_safe(buf + 12, len, tmp, (lzo_uint *)unpacked_len, NULL)) != LZO_E_OK)
{ cs_log_dbg(D_READER, "gbox: decompression failed! errno=%d", err); }
memcpy(buf + 12, tmp, *unpacked_len);
*unpacked_len += 12;
NULLFREE(tmp);
}
#endif