ref: 960d0b5da3f617d9416e5635816a05c3caf4ff88
dir: /common/mp4ff/drms.c/
/*****************************************************************************
* drms.c : DRMS
*****************************************************************************
* Copyright (C) 2004 VideoLAN
* $Id: drms.c,v 1.3 2004/01/11 15:52:18 menno Exp $
*
* Author: Jon Lech Johansen <jon-vl@nanocrew.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include "mp4ffint.h"
#ifdef ITUNES_DRM
#ifdef _WIN32
#include <tchar.h>
#include <shlobj.h>
#include <windows.h>
#endif
#include "drms.h"
#include "drmstables.h"
static __inline uint32_t U32_AT( void * _p )
{
uint8_t * p = (uint8_t *)_p;
return ( ((uint32_t)p[0] << 24) | ((uint32_t)p[1] << 16)
| ((uint32_t)p[2] << 8) | p[3] );
}
#define TAOS_INIT( tmp, i ) \
memset( tmp, 0, sizeof(tmp) ); \
tmp[ i + 0 ] = 0x67452301; \
tmp[ i + 1 ] = 0xEFCDAB89; \
tmp[ i + 2 ] = 0x98BADCFE; \
tmp[ i + 3 ] = 0x10325476;
#define ROR( x, n ) (((x) << (32-(n))) | ((x) >> (n)))
static void init_ctx( uint32_t *p_ctx, uint32_t *p_input )
{
uint32_t i;
uint32_t p_tmp[ 6 ];
p_ctx[ 0 ] = sizeof(*p_input);
memset( &p_ctx[ 1 + 4 ], 0, sizeof(*p_input) * 4 );
memcpy( &p_ctx[ 1 + 0 ], p_input, sizeof(*p_input) * 4 );
p_tmp[ 0 ] = p_ctx[ 1 + 3 ];
for( i = 0; i < sizeof(p_drms_tab1)/sizeof(p_drms_tab1[ 0 ]); i++ )
{
p_tmp[ 0 ] = ROR( p_tmp[ 0 ], 8 );
p_tmp[ 5 ] = p_drms_tab2[ (p_tmp[ 0 ] >> 24) & 0xFF ]
^ ROR( p_drms_tab2[ (p_tmp[ 0 ] >> 16) & 0xFF ], 8 )
^ ROR( p_drms_tab2[ (p_tmp[ 0 ] >> 8) & 0xFF ], 16 )
^ ROR( p_drms_tab2[ p_tmp[ 0 ] & 0xFF ], 24 )
^ p_drms_tab1[ i ]
^ p_ctx[ 1 + ((i + 1) * 4) - 4 ];
p_ctx[ 1 + ((i + 1) * 4) + 0 ] = p_tmp[ 5 ];
p_tmp[ 5 ] ^= p_ctx[ 1 + ((i + 1) * 4) - 3 ];
p_ctx[ 1 + ((i + 1) * 4) + 1 ] = p_tmp[ 5 ];
p_tmp[ 5 ] ^= p_ctx[ 1 + ((i + 1) * 4) - 2 ];
p_ctx[ 1 + ((i + 1) * 4) + 2 ] = p_tmp[ 5 ];
p_tmp[ 5 ] ^= p_ctx[ 1 + ((i + 1) * 4) - 1 ];
p_ctx[ 1 + ((i + 1) * 4) + 3 ] = p_tmp[ 5 ];
p_tmp[ 0 ] = p_tmp[ 5 ];
}
memcpy( &p_ctx[ 1 + 64 ], &p_ctx[ 1 ], sizeof(*p_ctx) * 4 );
for( i = 4; i < sizeof(p_drms_tab1); i++ )
{
p_tmp[ 2 ] = p_ctx[ 1 + 4 + (i - 4) ];
p_tmp[ 0 ] = (((p_tmp[ 2 ] >> 7) & 0x01010101) * 27)
^ ((p_tmp[ 2 ] & 0xFF7F7F7F) << 1);
p_tmp[ 1 ] = (((p_tmp[ 0 ] >> 7) & 0x01010101) * 27)
^ ((p_tmp[ 0 ] & 0xFF7F7F7F) << 1);
p_tmp[ 4 ] = (((p_tmp[ 1 ] >> 7) & 0x01010101) * 27)
^ ((p_tmp[ 1 ] & 0xFF7F7F7F) << 1);
p_tmp[ 2 ] ^= p_tmp[ 4 ];
p_tmp[ 3 ] = ROR( p_tmp[ 1 ] ^ p_tmp[ 2 ], 16 )
^ ROR( p_tmp[ 0 ] ^ p_tmp[ 2 ], 8 )
^ ROR( p_tmp[ 2 ], 24 );
p_ctx[ 1 + 4 + 64 + (i - 4) ] = p_tmp[ 3 ] ^ p_tmp[ 4 ]
^ p_tmp[ 1 ] ^ p_tmp[ 0 ];
}
}
static void ctx_xor( uint32_t *p_ctx, uint32_t *p_in, uint32_t *p_out,
uint32_t p_table1[ 256 ], uint32_t p_table2[ 256 ] )
{
uint32_t i, x, y;
uint32_t p_tmp1[ 4 ];
uint32_t p_tmp2[ 4 ];
i = p_ctx[ 0 ] * 4;
p_tmp1[ 0 ] = p_ctx[ 1 + i + 24 ] ^ p_in[ 0 ];
p_tmp1[ 1 ] = p_ctx[ 1 + i + 25 ] ^ p_in[ 1 ];
p_tmp1[ 2 ] = p_ctx[ 1 + i + 26 ] ^ p_in[ 2 ];
p_tmp1[ 3 ] = p_ctx[ 1 + i + 27 ] ^ p_in[ 3 ];
i += 84;
#define XOR_ROR( p_table, p_tmp, i_ctx ) \
p_table[ (p_tmp[ y > 2 ? y - 3 : y + 1 ] >> 24) & 0xFF ] \
^ ROR( p_table[ (p_tmp[ y > 1 ? y - 2 : y + 2 ] >> 16) & 0xFF ], 8 ) \
^ ROR( p_table[ (p_tmp[ y > 0 ? y - 1 : y + 3 ] >> 8) & 0xFF ], 16 ) \
^ ROR( p_table[ p_tmp[ y ] & 0xFF ], 24 ) \
^ p_ctx[ i_ctx ]
for( x = 0; x < 1; x++ )
{
memcpy( p_tmp2, p_tmp1, sizeof(p_tmp1) );
for( y = 0; y < 4; y++ )
{
p_tmp1[ y ] = XOR_ROR( p_table1, p_tmp2, 1 + i - x + y );
}
}
for( ; x < 9; x++ )
{
memcpy( p_tmp2, p_tmp1, sizeof(p_tmp1) );
for( y = 0; y < 4; y++ )
{
p_tmp1[ y ] = XOR_ROR( p_table1, p_tmp2,
1 + i - x - ((x * 3) - y) );
}
}
for( y = 0; y < 4; y++ )
{
p_out[ y ] = XOR_ROR( p_table2, p_tmp1,
1 + i - x - ((x * 3) - y) );
}
#undef XOR_ROR
}
static void taos( uint32_t *p_buffer, uint32_t *p_input )
{
uint32_t i;
uint32_t x = 0;
uint32_t p_tmp1[ 4 ];
uint32_t p_tmp2[ 4 ];
memcpy( p_tmp1, p_buffer, sizeof(p_tmp1) );
p_tmp2[ 0 ] = ((~p_tmp1[ 1 ] & p_tmp1[ 3 ])
| (p_tmp1[ 2 ] & p_tmp1[ 1 ])) + p_input[ x ];
p_tmp1[ 0 ] = p_tmp2[ 0 ] + p_tmp1[ 0 ] + p_drms_tab_taos[ x++ ];
for( i = 0; i < 4; i++ )
{
p_tmp2[ 0 ] = ((p_tmp1[ 0 ] >> 0x19)
| (p_tmp1[ 0 ] << 0x7)) + p_tmp1[ 1 ];
p_tmp2[ 1 ] = ((~p_tmp2[ 0 ] & p_tmp1[ 2 ])
| (p_tmp1[ 1 ] & p_tmp2[ 0 ])) + p_input[ x ];
p_tmp2[ 1 ] += p_tmp1[ 3 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 3 ] = ((p_tmp2[ 1 ] >> 0x14)
| (p_tmp2[ 1 ] << 0xC)) + p_tmp2[ 0 ];
p_tmp2[ 1 ] = ((~p_tmp1[ 3 ] & p_tmp1[ 1 ])
| (p_tmp1[ 3 ] & p_tmp2[ 0 ])) + p_input[ x ];
p_tmp2[ 1 ] += p_tmp1[ 2 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 2 ] = ((p_tmp2[ 1 ] >> 0xF)
| (p_tmp2[ 1 ] << 0x11)) + p_tmp1[ 3 ];
p_tmp2[ 1 ] = ((~p_tmp1[ 2 ] & p_tmp2[ 0 ])
| (p_tmp1[ 3 ] & p_tmp1[ 2 ])) + p_input[ x ];
p_tmp2[ 2 ] = p_tmp2[ 1 ] + p_tmp1[ 1 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 1 ] = ((p_tmp2[ 2 ] << 0x16)
| (p_tmp2[ 2 ] >> 0xA)) + p_tmp1[ 2 ];
if( i == 3 )
{
p_tmp2[ 1 ] = ((~p_tmp1[ 3 ] & p_tmp1[ 2 ])
| (p_tmp1[ 3 ] & p_tmp1[ 1 ])) + p_input[ 1 ];
}
else
{
p_tmp2[ 1 ] = ((~p_tmp1[ 1 ] & p_tmp1[ 3 ])
| (p_tmp1[ 2 ] & p_tmp1[ 1 ])) + p_input[ x ];
}
p_tmp1[ 0 ] = p_tmp2[ 0 ] + p_tmp2[ 1 ] + p_drms_tab_taos[ x++ ];
}
for( i = 0; i < 4; i++ )
{
uint8_t p_table[ 4 ][ 4 ] =
{
{ 6, 11, 0, 5 },
{ 10, 15, 4, 9 },
{ 14, 3, 8, 13 },
{ 2, 7, 12, 5 }
};
p_tmp2[ 0 ] = ((p_tmp1[ 0 ] >> 0x1B)
| (p_tmp1[ 0 ] << 0x5)) + p_tmp1[ 1 ];
p_tmp2[ 1 ] = ((~p_tmp1[ 2 ] & p_tmp1[ 1 ])
| (p_tmp1[ 2 ] & p_tmp2[ 0 ]))
+ p_input[ p_table[ i ][ 0 ] ];
p_tmp2[ 1 ] += p_tmp1[ 3 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 3 ] = ((p_tmp2[ 1 ] >> 0x17)
| (p_tmp2[ 1 ] << 0x9)) + p_tmp2[ 0 ];
p_tmp2[ 1 ] = ((~p_tmp1[ 1 ] & p_tmp2[ 0 ])
| (p_tmp1[ 3 ] & p_tmp1[ 1 ]))
+ p_input[ p_table[ i ][ 1 ] ];
p_tmp2[ 1 ] += p_tmp1[ 2 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 2 ] = ((p_tmp2[ 1 ] >> 0x12)
| (p_tmp2[ 1 ] << 0xE)) + p_tmp1[ 3 ];
p_tmp2[ 1 ] = ((~p_tmp2[ 0 ] & p_tmp1[ 3 ])
| (p_tmp1[ 2 ] & p_tmp2[ 0 ]))
+ p_input[ p_table[ i ][ 2 ] ];
p_tmp2[ 1 ] += p_tmp1[ 1 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 1 ] = ((p_tmp2[ 1 ] << 0x14)
| (p_tmp2[ 1 ] >> 0xC)) + p_tmp1[ 2 ];
if( i == 3 )
{
p_tmp2[ 1 ] = (p_tmp1[ 3 ] ^ p_tmp1[ 2 ] ^ p_tmp1[ 1 ])
+ p_input[ p_table[ i ][ 3 ] ];
}
else
{
p_tmp2[ 1 ] = ((~p_tmp1[ 3 ] & p_tmp1[ 2 ])
| (p_tmp1[ 3 ] & p_tmp1[ 1 ]))
+ p_input[ p_table[ i ][ 3 ] ];
}
p_tmp1[ 0 ] = p_tmp2[ 0 ] + p_tmp2[ 1 ] + p_drms_tab_taos[ x++ ];
}
for( i = 0; i < 4; i++ )
{
uint8_t p_table[ 4 ][ 4 ] =
{
{ 8, 11, 14, 1 },
{ 4, 7, 10, 13 },
{ 0, 3, 6, 9 },
{ 12, 15, 2, 0 }
};
p_tmp2[ 0 ] = ((p_tmp1[ 0 ] >> 0x1C)
| (p_tmp1[ 0 ] << 0x4)) + p_tmp1[ 1 ];
p_tmp2[ 1 ] = (p_tmp1[ 2 ] ^ p_tmp1[ 1 ] ^ p_tmp2[ 0 ])
+ p_input[ p_table[ i ][ 0 ] ];
p_tmp2[ 1 ] += p_tmp1[ 3 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 3 ] = ((p_tmp2[ 1 ] >> 0x15)
| (p_tmp2[ 1 ] << 0xB)) + p_tmp2[ 0 ];
p_tmp2[ 1 ] = (p_tmp1[ 3 ] ^ p_tmp1[ 1 ] ^ p_tmp2[ 0 ])
+ p_input[ p_table[ i ][ 1 ] ];
p_tmp2[ 1 ] += p_tmp1[ 2 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 2 ] = ((p_tmp2[ 1 ] >> 0x10)
| (p_tmp2[ 1 ] << 0x10)) + p_tmp1[ 3 ];
p_tmp2[ 1 ] = (p_tmp1[ 3 ] ^ p_tmp1[ 2 ] ^ p_tmp2[ 0 ])
+ p_input[ p_table[ i ][ 2 ] ];
p_tmp2[ 1 ] += p_tmp1[ 1 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 1 ] = ((p_tmp2[ 1 ] << 0x17)
| (p_tmp2[ 1 ] >> 0x9)) + p_tmp1[ 2 ];
if( i == 3 )
{
p_tmp2[ 1 ] = ((~p_tmp1[ 3 ] | p_tmp1[ 1 ]) ^ p_tmp1[ 2 ])
+ p_input[ p_table[ i ][ 3 ] ];
}
else
{
p_tmp2[ 1 ] = (p_tmp1[ 3 ] ^ p_tmp1[ 2 ] ^ p_tmp1[ 1 ])
+ p_input[ p_table[ i ][ 3 ] ];
}
p_tmp1[ 0 ] = p_tmp2[ 0 ] + p_tmp2[ 1 ] + p_drms_tab_taos[ x++ ];
}
for( i = 0; i < 4; i++ )
{
uint8_t p_table[ 4 ][ 4 ] =
{
{ 7, 14, 5, 12 },
{ 3, 10, 1, 8 },
{ 15, 6, 13, 4 },
{ 11, 2, 9, 0 }
};
p_tmp2[ 0 ] = ((p_tmp1[ 0 ] >> 0x1A)
| (p_tmp1[ 0 ] << 0x6)) + p_tmp1[ 1 ];
p_tmp2[ 1 ] = ((~p_tmp1[ 2 ] | p_tmp2[ 0 ]) ^ p_tmp1[ 1 ])
+ p_input[ p_table[ i ][ 0 ] ];
p_tmp2[ 1 ] += p_tmp1[ 3 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 3 ] = ((p_tmp2[ 1 ] >> 0x16)
| (p_tmp2[ 1 ] << 0xA)) + p_tmp2[ 0 ];
p_tmp2[ 1 ] = ((~p_tmp1[ 1 ] | p_tmp1[ 3 ]) ^ p_tmp2[ 0 ])
+ p_input[ p_table[ i ][ 1 ] ];
p_tmp2[ 1 ] += p_tmp1[ 2 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 2 ] = ((p_tmp2[ 1 ] >> 0x11)
| (p_tmp2[ 1 ] << 0xF)) + p_tmp1[ 3 ];
p_tmp2[ 1 ] = ((~p_tmp2[ 0 ] | p_tmp1[ 2 ]) ^ p_tmp1[ 3 ])
+ p_input[ p_table[ i ][ 2 ] ];
p_tmp2[ 1 ] += p_tmp1[ 1 ] + p_drms_tab_taos[ x++ ];
p_tmp1[ 1 ] = ((p_tmp2[ 1 ] << 0x15)
| (p_tmp2[ 1 ] >> 0xB)) + p_tmp1[ 2 ];
if( i < 3 )
{
p_tmp2[ 1 ] = ((~p_tmp1[ 3 ] | p_tmp1[ 1 ]) ^ p_tmp1[ 2 ])
+ p_input[ p_table[ i ][ 3 ] ];
p_tmp1[ 0 ] = p_tmp2[ 0 ] + p_tmp2[ 1 ] + p_drms_tab_taos[ x++ ];
}
}
p_buffer[ 0 ] += p_tmp2[ 0 ];
p_buffer[ 1 ] += p_tmp1[ 1 ];
p_buffer[ 2 ] += p_tmp1[ 2 ];
p_buffer[ 3 ] += p_tmp1[ 3 ];
}
static void taos_add1( uint32_t *p_buffer,
uint8_t *p_in, uint32_t i_len )
{
uint32_t i;
uint32_t x, y;
uint32_t p_tmp[ 16 ];
uint32_t i_offset = 0;
x = p_buffer[ 6 ] & 63;
y = 64 - x;
p_buffer[ 6 ] += i_len;
if( i_len < y )
{
memcpy( &((uint8_t *)p_buffer)[ 48 + x ], p_in, i_len );
}
else
{
if( x )
{
memcpy( &((uint8_t *)p_buffer)[ 48 + x ], p_in, y );
taos( &p_buffer[ 8 ], &p_buffer[ 12 ] );
i_offset = y;
i_len -= y;
}
if( i_len >= 64 )
{
for( i = 0; i < i_len / 64; i++ )
{
memcpy( p_tmp, &p_in[ i_offset ], sizeof(p_tmp) );
taos( &p_buffer[ 8 ], p_tmp );
i_offset += 64;
i_len -= 64;
}
}
if( i_len )
{
memcpy( &p_buffer[ 12 ], &p_in[ i_offset ], i_len );
}
}
}
static void taos_end1( uint32_t *p_buffer, uint32_t *p_out )
{
uint32_t x, y;
x = p_buffer[ 6 ] & 63;
y = 63 - x;
((uint8_t *)p_buffer)[ 48 + x++ ] = 128;
if( y < 8 )
{
memset( &((uint8_t *)p_buffer)[ 48 + x ], 0, y );
taos( &p_buffer[ 8 ], &p_buffer[ 12 ] );
y = 64;
x = 0;
}
memset( &((uint8_t *)p_buffer)[ 48 + x ], 0, y );
p_buffer[ 26 ] = p_buffer[ 6 ] * 8;
p_buffer[ 27 ] = p_buffer[ 6 ] >> 29;
taos( &p_buffer[ 8 ], &p_buffer[ 12 ] );
memcpy( p_out, &p_buffer[ 8 ], sizeof(*p_out) * 4 );
}
static void taos_add2( uint32_t *p_buffer, uint8_t *p_in, uint32_t i_len )
{
uint32_t i, x;
uint32_t p_tmp[ 16 ];
x = (p_buffer[ 0 ] / 8) & 63;
i = p_buffer[ 0 ] + i_len * 8;
if( i < p_buffer[ 0 ] )
{
p_buffer[ 1 ] += 1;
}
p_buffer[ 0 ] = i;
p_buffer[ 1 ] += i_len >> 29;
for( i = 0; i < i_len; i++ )
{
((uint8_t *)p_buffer)[ 24 + x++ ] = p_in[ i ];
if( x != 64 )
continue;
memcpy( p_tmp, &p_buffer[ 6 ], sizeof(p_tmp) );
taos( &p_buffer[ 2 ], p_tmp );
}
}
static void taos_add2e( uint32_t *p_buffer, uint32_t *p_in, uint32_t i_len )
{
uint32_t i, x, y;
uint32_t p_tmp[ 32 ];
if( i_len )
{
for( x = i_len; x; x -= y )
{
y = x > 32 ? 32 : x;
for( i = 0; i < y; i++ )
{
p_tmp[ i ] = U32_AT(&p_in[ i ]);
}
}
}
taos_add2( p_buffer, (uint8_t *)p_tmp, i_len * sizeof(p_tmp[ 0 ]) );
}
static void taos_end2( uint32_t *p_buffer )
{
uint32_t x;
uint32_t p_tmp[ 16 ];
p_tmp[ 14 ] = p_buffer[ 0 ];
p_tmp[ 15 ] = p_buffer[ 1 ];
x = (p_buffer[ 0 ] / 8) & 63;
taos_add2( p_buffer, p_drms_tab_tend, 56 - x );
memcpy( p_tmp, &p_buffer[ 6 ], 56 );
taos( &p_buffer[ 2 ], p_tmp );
memcpy( &p_buffer[ 22 ], &p_buffer[ 2 ], sizeof(*p_buffer) * 4 );
}
static void taos_add3( uint32_t *p_buffer, uint8_t *p_key, uint32_t i_len )
{
uint32_t x, y;
uint32_t i = 0;
x = (p_buffer[ 4 ] / 8) & 63;
p_buffer[ 4 ] += i_len * 8;
if( p_buffer[ 4 ] < i_len * 8 )
p_buffer[ 5 ] += 1;
p_buffer[ 5 ] += i_len >> 29;
y = 64 - x;
if( i_len >= y )
{
memcpy( &((uint8_t *)p_buffer)[ 24 + x ], p_key, y );
taos( p_buffer, &p_buffer[ 6 ] );
i = y;
y += 63;
if( y < i_len )
{
for( ; y < i_len; y += 64, i += 64 )
{
taos( p_buffer, (uint32_t *)&p_key[y - 63] );
}
}
else
{
x = 0;
}
}
memcpy( &((uint8_t *)p_buffer)[ 24 + x ], &p_key[ i ], i_len - i );
}
static int taos_osi( uint32_t *p_buffer )
{
int i_ret = 0;
#ifdef _WIN32
HKEY i_key;
uint32_t i;
DWORD i_size;
DWORD i_serial;
LPBYTE p_reg_buf;
static LPCTSTR p_reg_keys[ 3 ][ 2 ] =
{
{
_T("HARDWARE\\DESCRIPTION\\System"),
_T("SystemBiosVersion")
},
{
_T("HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0"),
_T("ProcessorNameString")
},
{
_T("SOFTWARE\\Microsoft\\Windows\\CurrentVersion"),
_T("ProductId")
}
};
taos_add1( p_buffer, "cache-control", 13 );
taos_add1( p_buffer, "Ethernet", 8 );
GetVolumeInformation( _T("C:\\"), NULL, 0, &i_serial,
NULL, NULL, NULL, 0 );
taos_add1( p_buffer, (uint8_t *)&i_serial, 4 );
for( i = 0; i < sizeof(p_reg_keys)/sizeof(p_reg_keys[ 0 ]); i++ )
{
if( RegOpenKeyEx( HKEY_LOCAL_MACHINE, p_reg_keys[ i ][ 0 ],
0, KEY_READ, &i_key ) == ERROR_SUCCESS )
{
if( RegQueryValueEx( i_key, p_reg_keys[ i ][ 1 ],
NULL, NULL, NULL,
&i_size ) == ERROR_SUCCESS )
{
p_reg_buf = malloc( i_size );
if( p_reg_buf != NULL )
{
if( RegQueryValueEx( i_key, p_reg_keys[ i ][ 1 ],
NULL, NULL, p_reg_buf,
&i_size ) == ERROR_SUCCESS )
{
taos_add1( p_buffer, (uint8_t *)p_reg_buf,
i_size );
}
free( p_reg_buf );
}
}
RegCloseKey( i_key );
}
}
#else
i_ret = -1;
#endif
return( i_ret );
}
static int get_sci_data( uint32_t p_sci[ 11 ][ 4 ] )
{
int i_ret = -1;
#ifdef _WIN32
HANDLE i_file;
DWORD i_size, i_read;
TCHAR p_path[ MAX_PATH ];
TCHAR *p_filename = _T("\\Apple Computer\\iTunes\\SC Info\\SC Info.sidb");
typedef HRESULT (WINAPI *SHGETFOLDERPATH)( HWND, int, HANDLE, DWORD,
LPTSTR );
HINSTANCE shfolder_dll = NULL;
SHGETFOLDERPATH dSHGetFolderPath = NULL;
if( ( shfolder_dll = LoadLibrary( _T("SHFolder.dll") ) ) != NULL )
{
dSHGetFolderPath =
(SHGETFOLDERPATH)GetProcAddress( shfolder_dll,
#ifdef _UNICODE
_T("SHGetFolderPathW") );
#else
_T("SHGetFolderPathA") );
#endif
}
if( dSHGetFolderPath != NULL &&
SUCCEEDED( dSHGetFolderPath( NULL, /*CSIDL_COMMON_APPDATA*/ 0x0023,
NULL, 0, p_path ) ) )
{
_tcsncat( p_path, p_filename, min( _tcslen( p_filename ),
(MAX_PATH-1) - _tcslen( p_path ) ) );
i_file = CreateFile( p_path, GENERIC_READ, 0, NULL,
OPEN_EXISTING, 0, NULL );
if( i_file != INVALID_HANDLE_VALUE )
{
i_read = sizeof(p_sci[ 0 ]) * 11;
i_size = GetFileSize( i_file, NULL );
if( i_size != INVALID_FILE_SIZE && i_size >= i_read )
{
i_size = SetFilePointer( i_file, 4, NULL, FILE_BEGIN );
if( i_size != /*INVALID_SET_FILE_POINTER*/ ((DWORD)-1))
{
if( ReadFile( i_file, p_sci, i_read, &i_size, NULL ) &&
i_size == i_read )
{
i_ret = 0;
}
}
}
CloseHandle( i_file );
}
}
#endif
return( i_ret );
}
static void acei_taxs( uint32_t *p_acei, uint32_t i_val )
{
uint32_t i, x;
i = (i_val / 16) & 15;
x = (~(i_val & 15)) & 15;
if( (i_val & 768) == 768 )
{
x = (~i) & 15;
i = i_val & 15;
p_acei[ 25 + i ] = p_acei[ 25 + ((16 - x) & 15) ]
+ p_acei[ 25 + (15 - x) ];
}
else if( (i_val & 512) == 512 )
{
p_acei[ 25 + i ] ^= p_drms_tab_xor[ 15 - i ][ x ];
}
else if( (i_val & 256) == 256 )
{
p_acei[ 25 + i ] -= p_drms_tab_sub[ 15 - i ][ x ];
}
else
{
p_acei[ 25 + i ] += p_drms_tab_add[ 15 - i ][ x ];
}
}
static void acei( uint32_t *p_acei, uint8_t *p_buffer, uint32_t i_len )
{
uint32_t i, x;
uint32_t p_tmp[ 26 ];
for( i = 5; i < 25; i++ )
{
if( p_acei[ i ] )
{
acei_taxs( p_acei, p_acei[ i ] );
}
}
TAOS_INIT( p_tmp, 2 );
taos_add2e( p_tmp, &p_acei[ 25 ], sizeof(*p_acei) * 4 );
taos_end2( p_tmp );
x = i_len < 16 ? i_len : 16;
if( x > 0 )
{
for( i = 0; i < x; i++ )
{
p_buffer[ i ] ^= ((uint8_t *)&p_tmp)[ 88 + i ];
}
}
}
static uint32_t ttov_calc( uint32_t *p_acei )
{
int32_t i_val;
uint32_t p_tmp[ 26 ];
TAOS_INIT( p_tmp, 2 );
taos_add2e( p_tmp, &p_acei[ 0 ], 4 );
taos_add2e( p_tmp, &p_acei[ 4 ], 1 );
taos_end2( p_tmp );
p_acei[ 4 ]++;
i_val = ((int32_t)U32_AT(&p_tmp[ 22 ])) % 1024;
return( i_val < 0 ? i_val * -1 : i_val );
}
static void acei_init( uint32_t *p_acei, uint32_t *p_sys_key )
{
uint32_t i;
for( i = 0; i < 4; i++ )
{
p_acei[ i ] = U32_AT(&p_sys_key[ i ]);
}
p_acei[ 4 ] = 0x5476212A;
for( i = 5; i < 25; i++ )
{
p_acei[ i ] = ttov_calc( p_acei );
}
p_acei[ 25 + 0 ] = p_acei[ 0 ];
p_acei[ 25 + 1 ] = 0x68723876;
p_acei[ 25 + 2 ] = 0x41617376;
p_acei[ 25 + 3 ] = 0x4D4B4F76;
p_acei[ 25 + 4 ] = p_acei[ 1 ];
p_acei[ 25 + 5 ] = 0x48556646;
p_acei[ 25 + 6 ] = 0x38393725;
p_acei[ 25 + 7 ] = 0x2E3B5B3D;
p_acei[ 25 + 8 ] = p_acei[ 2 ];
p_acei[ 25 + 9 ] = 0x37363866;
p_acei[ 25 + 10 ] = 0x30383637;
p_acei[ 25 + 11 ] = 0x34333661;
p_acei[ 25 + 12 ] = p_acei[ 3 ];
p_acei[ 25 + 13 ] = 0x37386162;
p_acei[ 25 + 14 ] = 0x494F6E66;
p_acei[ 25 + 15 ] = 0x2A282966;
}
static __inline void block_xor( uint32_t *p_in, uint32_t *p_key,
uint32_t *p_out )
{
uint32_t i;
for( i = 0; i < 4; i++ )
{
p_out[ i ] = p_key[ i ] ^ p_in[ i ];
}
}
int drms_get_sys_key( uint32_t *p_sys_key )
{
uint32_t p_tmp[ 128 ];
uint32_t p_tmp_key[ 4 ];
TAOS_INIT( p_tmp, 8 );
if( taos_osi( p_tmp ) )
{
return( -1 );
}
taos_end1( p_tmp, p_tmp_key );
TAOS_INIT( p_tmp, 2 );
taos_add2( p_tmp, "YuaFlafu", 8 );
taos_add2( p_tmp, (uint8_t *)p_tmp_key, 6 );
taos_add2( p_tmp, (uint8_t *)p_tmp_key, 6 );
taos_add2( p_tmp, (uint8_t *)p_tmp_key, 6 );
taos_add2( p_tmp, "zPif98ga", 8 );
taos_end2( p_tmp );
memcpy( p_sys_key, &p_tmp[ 2 ], sizeof(*p_sys_key) * 4 );
return( 0 );
}
int drms_get_user_key( uint32_t *p_sys_key, uint32_t *p_user_key )
{
uint32_t i;
uint32_t p_tmp[ 4 ];
uint32_t *p_cur_key;
uint32_t p_acei[ 41 ];
uint32_t p_ctx[ 128 ];
uint32_t p_sci[ 2 ][ 11 ][ 4 ];
uint32_t p_sci_key[ 4 ] =
{
0x6E66556D, 0x6E676F70, 0x67666461, 0x33373866
};
if( p_sys_key == NULL )
{
if( drms_get_sys_key( p_tmp ) )
{
return( -1 );
}
p_sys_key = p_tmp;
}
if( get_sci_data( p_sci[ 0 ] ) )
{
return( -1 );
}
init_ctx( p_ctx, p_sys_key );
for( i = 0, p_cur_key = p_sci_key;
i < sizeof(p_sci[ 0 ])/sizeof(p_sci[ 0 ][ 0 ]); i++ )
{
ctx_xor( p_ctx, &p_sci[ 0 ][ i ][ 0 ], &p_sci[ 1 ][ i ][ 0 ],
p_drms_tab3, p_drms_tab4 );
block_xor( &p_sci[ 1 ][ i ][ 0 ], p_cur_key, &p_sci[ 1 ][ i ][ 0 ] );
p_cur_key = &p_sci[ 0 ][ i ][ 0 ];
}
acei_init( p_acei, p_sys_key );
for( i = 0; i < sizeof(p_sci[ 1 ])/sizeof(p_sci[ 1 ][ 0 ]); i++ )
{
acei( p_acei, (uint8_t *)&p_sci[ 1 ][ i ][ 0 ],
sizeof(p_sci[ 1 ][ i ]) );
}
memcpy( p_user_key, &p_sci[ 1 ][ 10 ][ 0 ], sizeof(p_sci[ 1 ][ i ]) );
return( 0 );
}
struct drms_s
{
uint8_t *p_iviv;
uint32_t i_iviv_len;
uint8_t *p_name;
uint32_t i_name_len;
uint32_t *p_tmp;
uint32_t i_tmp_len;
uint32_t p_key[ 4 ];
uint32_t p_ctx[ 128 ];
};
#define P_DRMS ((struct drms_s *)p_drms)
void *drms_alloc()
{
struct drms_s *p_drms;
p_drms = malloc( sizeof(struct drms_s) );
if( p_drms != NULL )
{
memset( p_drms, 0, sizeof(struct drms_s) );
p_drms->i_tmp_len = 1024;
p_drms->p_tmp = malloc( p_drms->i_tmp_len );
if( p_drms->p_tmp == NULL )
{
free( (void *)p_drms );
p_drms = NULL;
}
}
return( (void *)p_drms );
}
void drms_free( void *p_drms )
{
if( P_DRMS->p_name != NULL )
{
free( (void *)P_DRMS->p_name );
}
if( P_DRMS->p_iviv != NULL )
{
free( (void *)P_DRMS->p_iviv );
}
if( P_DRMS->p_tmp != NULL )
{
free( (void *)P_DRMS->p_tmp );
}
free( p_drms );
}
void drms_decrypt( void *p_drms, uint32_t *p_buffer, uint32_t i_len )
{
uint32_t i, x, y;
uint32_t *p_cur_key = P_DRMS->p_key;
x = (i_len / sizeof(P_DRMS->p_key)) * sizeof(P_DRMS->p_key);
if( P_DRMS->i_tmp_len < x )
{
free( (void *)P_DRMS->p_tmp );
P_DRMS->i_tmp_len = x;
P_DRMS->p_tmp = malloc( P_DRMS->i_tmp_len );
}
if( P_DRMS->p_tmp != NULL )
{
memcpy( P_DRMS->p_tmp, p_buffer, x );
for( i = 0, x /= sizeof(P_DRMS->p_key); i < x; i++ )
{
y = i * sizeof(*p_buffer);
ctx_xor( P_DRMS->p_ctx, P_DRMS->p_tmp + y, p_buffer + y,
p_drms_tab3, p_drms_tab4 );
block_xor( p_buffer + y, p_cur_key, p_buffer + y );
p_cur_key = P_DRMS->p_tmp + y;
}
}
}
int drms_init( void *p_drms, uint32_t i_type,
uint8_t *p_info, uint32_t i_len )
{
int i_ret = 0;
switch( i_type )
{
case DRMS_INIT_UKEY:
{
if( i_len != sizeof(P_DRMS->p_key) )
{
i_ret = -1;
break;
}
init_ctx( P_DRMS->p_ctx, (uint32_t *)p_info );
}
break;
case DRMS_INIT_IVIV:
{
if( i_len != sizeof(P_DRMS->p_key) )
{
i_ret = -1;
break;
}
P_DRMS->p_iviv = malloc( i_len );
if( P_DRMS->p_iviv == NULL )
{
i_ret = -1;
break;
}
memcpy( P_DRMS->p_iviv, p_info, i_len );
P_DRMS->i_iviv_len = i_len;
}
break;
case DRMS_INIT_NAME:
{
P_DRMS->p_name = malloc( i_len );
if( P_DRMS->p_name == NULL )
{
i_ret = -1;
break;
}
memcpy( P_DRMS->p_name, p_info, i_len );
P_DRMS->i_name_len = i_len;
}
break;
case DRMS_INIT_PRIV:
{
uint32_t i;
uint32_t p_priv[ 64 ];
uint32_t p_tmp[ 128 ];
if( i_len < 64 )
{
i_ret = -1;
break;
}
TAOS_INIT( p_tmp, 0 );
taos_add3( p_tmp, P_DRMS->p_name, P_DRMS->i_name_len );
taos_add3( p_tmp, P_DRMS->p_iviv, P_DRMS->i_iviv_len );
memcpy( p_priv, &p_tmp[ 4 ], sizeof(p_priv[ 0 ]) * 2 );
i = (p_tmp[ 4 ] / 8) & 63;
i = i >= 56 ? 120 - i : 56 - i;
taos_add3( p_tmp, p_drms_tab_tend, i );
taos_add3( p_tmp, (uint8_t *)p_priv, sizeof(p_priv[ 0 ]) * 2 );
memcpy( p_priv, p_info, 64 );
memcpy( P_DRMS->p_key, p_tmp, sizeof(P_DRMS->p_key) );
drms_decrypt( p_drms, p_priv, sizeof(p_priv) );
init_ctx( P_DRMS->p_ctx, &p_priv[ 6 ] );
memcpy( P_DRMS->p_key, &p_priv[ 12 ], sizeof(P_DRMS->p_key) );
free( (void *)P_DRMS->p_name );
P_DRMS->p_name = NULL;
free( (void *)P_DRMS->p_iviv );
P_DRMS->p_iviv = NULL;
}
break;
}
return( i_ret );
}
#undef P_DRMS
#endif