Skip to content

V
vlc
Commit c5695896 authored by Jon Lech Johansen's avatar Jon Lech Johansen
Browse files
Options

* drms.c: DRMS v2 support. Thanks to sam for cleaning and breaking up 

            DoExtShuffle into smaller functions.
parent 68d75ffc
Hide whitespace changes
Inline Side-by-side
Showing with 831 additions and 4 deletions
modules/demux/mp4/drms.c
View file @ c5695896
......@@ -2,7 +2,7 @@
* drms.c: DRMS
*****************************************************************************
* Copyright (C) 2004 VideoLAN
* $Id: drms.c,v 1.13 2004/02/17 13:13:31 gbazin Exp $
* $Id$
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
* Sam Hocevar <sam@zoy.org>
......@@ -102,10 +102,25 @@ struct md5_s
*****************************************************************************/
struct shuffle_s
{
uint32_t i_version;
uint32_t p_commands[ 20 ];
uint32_t p_bordel[ 16 ];
};
/*****************************************************************************
* shuffle_ext_s: extended shuffle structure
*****************************************************************************
* This structure stores the static information needed to shuffle data using
* a custom algorithm.
*****************************************************************************/
struct shuffle_ext_s
{
uint32_t * p_bordel;
uint32_t i_cmd, i_jc, i_tmp;
};
#define SWAP( a, b ) { (a) ^= (b); (b) ^= (a); (a) ^= (b); }
/*****************************************************************************
* drms_s: DRMS structure
*****************************************************************************
......@@ -135,9 +150,20 @@ static void AddMD5 ( struct md5_s *, const uint8_t *, uint32_t );
static void EndMD5 ( struct md5_s * );
static void Digest ( struct md5_s *, uint32_t * );
static void InitShuffle ( struct shuffle_s *, uint32_t * );
static void InitShuffle ( struct shuffle_s *, uint32_t *, uint32_t );
static void DoShuffle ( struct shuffle_s *, uint32_t *, uint32_t );
static uint32_t FirstPass ( uint32_t * );
static void SecondPass ( struct shuffle_ext_s * );
static uint32_t ThirdPass ( uint32_t * );
static void FourthPass ( uint32_t *, uint32_t );
static void FifthPass ( uint32_t * );
static void BigShuffle1 ( struct shuffle_ext_s * );
static void BigShuffle2 ( struct shuffle_ext_s * );
static void TinyShuffle1 ( uint32_t * );
static void TinyShuffle2 ( uint32_t * );
static void DoExtShuffle ( uint32_t * );
static int GetSystemKey ( uint32_t *, vlc_bool_t );
static int WriteUserKey ( void *, uint32_t * );
static int ReadUserKey ( void *, uint32_t * );
......@@ -647,13 +673,16 @@ static void Digest( struct md5_s *p_md5, uint32_t *p_input )
* This function initialises tables in the p_shuffle structure that will be
* used later by DoShuffle. The only external parameter is p_sys_key.
*****************************************************************************/
static void InitShuffle( struct shuffle_s *p_shuffle, uint32_t *p_sys_key )
static void InitShuffle( struct shuffle_s *p_shuffle, uint32_t *p_sys_key,
uint32_t i_version )
{
char p_secret1[] = "Tv!*";
static char const p_secret2[] = "v8rhvsaAvOKMFfUH%798=[;."
"f8677680a634ba87fnOIf)(*";
unsigned int i;
p_shuffle->i_version = i_version;
/* Fill p_commands using the key and a secret seed */
for( i = 0; i < 20; i++ )
{
......@@ -696,6 +725,34 @@ static void DoShuffle( struct shuffle_s *p_shuffle,
uint32_t *p_bordel = p_shuffle->p_bordel;
unsigned int i;
static uint32_t i_secret = 0;
static uint32_t p_secret1[] =
{
0xAAAAAAAA, 0x01757700, 0x00554580, 0x01724500, 0x00424580,
0x01427700, 0x00000080, 0xC1D59D01, 0x80144981, 0x815C8901,
0x80544981, 0x81D45D01, 0x00000080, 0x81A3BB03, 0x00A2AA82,
0x01A3BB03, 0x0022A282, 0x813BA202, 0x00000080, 0x6D575737,
0x4A5275A5, 0x6D525725, 0x4A5254A5, 0x6B725437, 0x00000080,
0xD5DDB938, 0x5455A092, 0x5D95A013, 0x4415A192, 0xC5DD393A,
0x00000080, 0x55555555
};
static char p_secret2[] =
"pbclevtug (p) Nccyr Pbzchgre, Vap. Nyy Evtugf Erfreirq.";
if( i_secret == 0 )
{
REVERSE( p_secret1, sizeof(p_secret1)/sizeof(p_secret1[ 0 ]) );
for( ; p_secret2[ i_secret ] != '\0'; i_secret++ )
{
#define ROT13(c) (((c)>='A'&&(c)<='Z')?(((c)-'A'+13)%26)+'A':\
((c)>='a'&&(c)<='z')?(((c)-'a'+13)%26)+'a':c)
p_secret2[ i_secret ] = ROT13(p_secret2[ i_secret ]);
}
i_secret++; /* include zero terminator */
}
/* Using the MD5 hash of a memory block is probably not one-way enough
* for the iTunes people. This function randomises p_bordel depending on
* the values in p_commands to make things even more messy in p_bordel. */
......@@ -729,6 +786,11 @@ static void DoShuffle( struct shuffle_s *p_shuffle,
}
}
if( p_shuffle->i_version == 0x01000300 )
{
DoExtShuffle( p_bordel );
}
/* Convert our newly randomised p_bordel to big endianness and take
* its MD5 hash. */
InitMD5( &md5 );
......@@ -737,6 +799,11 @@ static void DoShuffle( struct shuffle_s *p_shuffle,
p_big_bordel[ i ] = U32_AT(p_bordel + i);
}
AddMD5( &md5, (uint8_t *)p_big_bordel, 64 );
if( p_shuffle->i_version == 0x01000300 )
{
AddMD5( &md5, (uint8_t *)p_secret1, sizeof(p_secret1) );
AddMD5( &md5, (uint8_t *)p_secret2, i_secret );
}
EndMD5( &md5 );
/* XOR our buffer with the computed checksum */
......@@ -746,6 +813,766 @@ static void DoShuffle( struct shuffle_s *p_shuffle,
}
}
/*****************************************************************************
* DoExtShuffle: extended shuffle
*****************************************************************************
* This is even uglier.
*****************************************************************************/
static void DoExtShuffle( uint32_t * p_bordel )
{
uint32_t i_ret;
struct shuffle_ext_s exs;
exs.p_bordel = p_bordel;
exs.i_tmp = FirstPass( p_bordel );
SecondPass( &exs );
i_ret = ThirdPass( p_bordel );
FourthPass( p_bordel, i_ret );
FifthPass( p_bordel );
}
static uint32_t FirstPass( uint32_t * p_bordel )
{
uint32_t i, j;
uint32_t i_cmd, i_ret;
i_ret = 5;
i_cmd = (p_bordel[ 5 ] + 10) >> 2;
if( p_bordel[ 5 ] > 0x7D0 )
{
i_cmd -= 0x305;
}
switch( i_cmd & 3 )
{
case 0:
p_bordel[ 5 ] += 5;
break;
case 1:
p_bordel[ 4 ] -= 1;
break;
case 2:
if( p_bordel[ 4 ] & 5 )
{
p_bordel[ 1 ] ^= 0x4D;
}
/* no break */
case 3:
p_bordel[ 12 ] += 5;
break;
}
for( ; ; )
{
for( ; ; )
{
p_bordel[ 1 ] += 0x10000000;
p_bordel[ 3 ] += 0x12777;
if( (p_bordel[ 10 ] & 1) && i_ret )
{
i_ret--;
p_bordel[ 1 ] -= p_bordel[ 2 ];
p_bordel[ 11 ] += p_bordel[ 12 ];
break;
}
if( (p_bordel[ 1 ] + p_bordel[ 2 ]) >= 0x7D0 )
{
i_cmd = ((p_bordel[ 3 ] ^ 0x567F) >> 2) & 7;
switch( i_cmd )
{
case 0:
for( i = 0; i < 3; i++ )
{
if( p_bordel[ i + 10 ] > 0x4E20 )
{
p_bordel[ i + 1 ] += p_bordel[ i + 2 ];
}
}
break;
case 4:
p_bordel[ 1 ] -= p_bordel[ 2 ];
/* no break */
case 3:
p_bordel[ 11 ] += p_bordel[ 12 ];
break;
case 6:
p_bordel[ 3 ] ^= p_bordel[ 4 ];
/* no break */
case 8:
p_bordel[ 13 ] &= p_bordel[ 14 ];
/* no break */
case 1:
p_bordel[ 0 ] |= p_bordel[ 1 ];
if( i_ret )
{
return i_ret;
}
break;
}
break;
}
}
for( i = 0, i_cmd = 0; i < 16; i++ )
{
if( p_bordel[ i ] < p_bordel[ i_cmd ] )
{
i_cmd = i;
}
}
if( i_ret && i_cmd != 5 )
{
i_ret--;
}
else
{
if( i_cmd == 5 )
{
p_bordel[ 8 ] &= p_bordel[ 6 ] >> 1;
p_bordel[ 3 ] <<= 1;
}
for( i = 0; i < 3; i++ )
{
p_bordel[ 11 ] += 1;
if( p_bordel[ 11 ] & 5 )
{
p_bordel[ 8 ] += p_bordel[ 9 ];
}
else if( i_ret )
{
i_ret--;
i_cmd = 3;
goto break2;
}
}
i_cmd = (p_bordel[ 15 ] + 0x93) >> 3;
if( p_bordel[ 15 ] & 0x100 )
{
i_cmd ^= 0xDEAD;
}
}
switch( i_cmd & 3 )
{
case 0:
while( p_bordel[ 11 ] & 1 )
{
p_bordel[ 11 ] >>= 1;
p_bordel[ 12 ] += 1;
}
/* no break */
case 2:
p_bordel[ 14 ] -= 0x19FE;
break;
case 3:
if( i_ret )
{
i_ret--;
p_bordel[ 5 ] += 5;
continue;
}
break;
}
i_cmd = ((p_bordel[ 3 ] + p_bordel[ 4 ] + 10) >> 1) - p_bordel[ 4 ];
break;
}
break2:
switch( i_cmd & 3 )
{
case 0:
p_bordel[ 14 ] >>= 1;
break;
case 1:
p_bordel[ 5 ] <<= 2;
break;
case 2:
p_bordel[ 12 ] |= 5;
break;
case 3:
p_bordel[ 15 ] &= 0x55;
if( i_ret )
{
p_bordel[ 2 ] &= 0xB62FC;
return i_ret;
}
break;
}
for( i = 0, j = 0; i < 16; i++ )
{
if( (p_bordel[ i ] & 0x777) > (p_bordel[ j ] & 0x777) )
{
j = i;
}
}
if( j > 5 )
{
for( ; j < 15; j++ )
{
p_bordel[ j ] += p_bordel[ j + 1 ];
}
}
else
{
p_bordel[ 2 ] &= 0xB62FC;
}
return i_ret;
}
static void SecondPass( struct shuffle_ext_s * p_exs )
{
uint32_t i;
p_exs->i_cmd = p_exs->p_bordel[ 6 ] + 0x194B;
if( p_exs->p_bordel[ 6 ] > 0x2710 )
{
p_exs->i_cmd >>= 1;
}
switch( p_exs->i_cmd & 3 )
{
case 1:
p_exs->p_bordel[ 3 ] += 0x19FE;
break;
case 2:
p_exs->p_bordel[ 7 ] -= p_exs->p_bordel[ 3 ] >> 2;
/* no break */
case 0:
p_exs->p_bordel[ 5 ] ^= 0x248A;
break;
}
p_exs->i_jc = 5;
for( i = 0, p_exs->i_cmd = 0; i < 16; i++ )
{
if( p_exs->p_bordel[ i ] > p_exs->p_bordel[ p_exs->i_cmd ] )
{
p_exs->i_cmd = i;
}
}
switch( p_exs->i_cmd )
{
case 0:
if( p_exs->p_bordel[ 1 ] < p_exs->p_bordel[ 8 ] )
{
p_exs->p_bordel[ 5 ] += 1;
}
break;
case 4:
if( (p_exs->p_bordel[ 9 ] & 0x7777) == 0x3333 )
{
p_exs->p_bordel[ 5 ] -= 1;
}
else
{
p_exs->i_jc--;
if( p_exs->p_bordel[ 1 ] < p_exs->p_bordel[ 8 ] )
{
p_exs->p_bordel[ 5 ] += 1;
}
break;
}
/* no break */
case 7:
p_exs->p_bordel[ 2 ] -= 1;
p_exs->p_bordel[ 1 ] -= p_exs->p_bordel[ 5 ];
TinyShuffle1( p_exs->p_bordel );
return;
case 10:
p_exs->p_bordel[ 4 ] -= 1;
p_exs->p_bordel[ 5 ] += 1;
p_exs->p_bordel[ 6 ] -= 1;
p_exs->p_bordel[ 7 ] += 1;
break;
default:
p_exs->p_bordel[ 15 ] ^= 0x18547EFF;
break;
}
BigShuffle1( p_exs );
}
static void BigShuffle1( struct shuffle_ext_s * p_exs )
{
uint32_t i, j;
for( i = 0; i < 3; i++ )
{
p_exs->i_cmd = p_exs->p_bordel[ 12 ] + p_exs->p_bordel[ 13 ] + p_exs->p_bordel[ 6 ];
p_exs->i_cmd -= (((uint32_t)(((uint64_t)p_exs->i_cmd * 0x0CCCCCCCD) >> 32)) >> 2) * 5;
if( p_exs->i_cmd > 4 )
{
break;
}
switch( p_exs->i_cmd )
{
case 0:
p_exs->p_bordel[ 12 ] -= 1;
/* no break */
case 1:
p_exs->p_bordel[ 12 ] -= 1;
p_exs->p_bordel[ 13 ] += 1;
break;
case 2:
p_exs->p_bordel[ 13 ] += 4;
/* no break */
case 3:
p_exs->p_bordel[ 12 ] -= 1;
break;
case 4:
if( p_exs->i_jc )
{
p_exs->i_jc--;
p_exs->p_bordel[ 5 ] += 1;
p_exs->p_bordel[ 6 ] -= 1;
p_exs->p_bordel[ 7 ] += 1;
BigShuffle1( p_exs );
return;
}
break;
}
}
for( i = 0, j = 0; i < 16; i++ )
{
if( p_exs->p_bordel[ i ] < p_exs->p_bordel[ j ] )
{
j = i;
}
}
if( (p_exs->p_bordel[ j ] % (j + 1)) > 10 )
{
p_exs->p_bordel[ 1 ] -= 1;
p_exs->p_bordel[ 2 ] += 0x13;
p_exs->p_bordel[ 12 ] += 1;
}
BigShuffle2( p_exs );
}
static void BigShuffle2( struct shuffle_ext_s * p_exs )
{
uint32_t i;
p_exs->p_bordel[ 2 ] &= 0x7F3F;
for( i = 0; i < 5; i++ )
{
p_exs->i_cmd = (p_exs->p_bordel[ 2 ] + 0xA) + i;
p_exs->i_cmd -= (((uint32_t)(((uint64_t)p_exs->i_cmd * 0x0CCCCCCCD) >> 32)) >> 2) * 5;
if( p_exs->i_cmd > 4 )
{
continue;
}
switch( p_exs->i_cmd )
{
case 0:
p_exs->p_bordel[ 12 ] &= p_exs->p_bordel[ 2 ];
/* no break */
case 1:
p_exs->p_bordel[ 3 ] ^= p_exs->p_bordel[ 15 ];
break;
case 2:
p_exs->p_bordel[ 15 ] += 0x576;
/* no break */
case 3:
p_exs->p_bordel[ 7 ] -= 0x2D;
/* no break */
case 4:
p_exs->p_bordel[ 1 ] <<= 1;
break;
}
}
p_exs->i_cmd = (p_exs->p_bordel[ 2 ] * 2) + 15;
p_exs->i_cmd -= (((uint32_t)(((uint64_t)p_exs->i_cmd * 0x0CCCCCCCD) >> 32)) >> 2) * 5;
switch( p_exs->i_cmd )
{
case 0:
if( ( p_exs->p_bordel[ 3 ] + p_exs->i_tmp ) <=
( p_exs->p_bordel[ 1 ] + p_exs->p_bordel[ 15 ] ) )
{
p_exs->p_bordel[ 3 ] += 1;
}
break;
case 3:
p_exs->p_bordel[ 5 ] >>= 2;
break;
case 4:
p_exs->p_bordel[ 10 ] -= 0x13;
break;
}
p_exs->i_cmd = ((p_exs->p_bordel[ 2 ] * 2) + 10) >> 1;
if( p_exs->p_bordel[ 2 ] & 1 )
{
if( p_exs->i_jc )
{
p_exs->i_jc--;
p_exs->p_bordel[ 2 ] += 0x13;
p_exs->p_bordel[ 12 ] += 1;
BigShuffle2( p_exs );
return;
}
}
p_exs->i_cmd -= p_exs->p_bordel[ 2 ];
p_exs->i_cmd -= (((uint32_t)(((uint64_t)p_exs->i_cmd * 0x0CCCCCCCD) >> 32)) >> 3) * 10;
switch( p_exs->i_cmd )
{
case 0:
for( i = 0; i < 5; i++ )
{
if( ( p_exs->p_bordel[ 1 ] & p_exs->p_bordel[ 2 ] ) >
( p_exs->p_bordel[ 7 ] & p_exs->p_bordel[ 12 ] ) )
{
p_exs->p_bordel[ 2 ] += 1;
p_exs->p_bordel[ 7 ] ^= p_exs->p_bordel[ 2 ];
}
}
case 1:
p_exs->p_bordel[ 3 ] -= 1;
p_exs->p_bordel[ 4 ] |= 0x400000;
break;
case 2:
if( p_exs->p_bordel[ 13 ] >= p_exs->p_bordel[ 3 ] )
{
if( p_exs->i_jc )
{
p_exs->i_jc--;
p_exs->p_bordel[ 5 ] += 1;
p_exs->p_bordel[ 6 ] -= 1;
p_exs->p_bordel[ 7 ] += 1;
BigShuffle1( p_exs );
}
return;
}
else
{
p_exs->p_bordel[ 5 ] += 3;
}
break;
case 3:
p_exs->p_bordel[ 1 ] ^= (p_exs->p_bordel[ 5 ] + p_exs->p_bordel[ 15 ]);
break;
case 4:
p_exs->p_bordel[ 14 ] += 1;
break;
case 5:
p_exs->p_bordel[ 2 ] &= 0x10076000;
break;
case 6:
p_exs->p_bordel[ 1 ] -= p_exs->p_bordel[ 5 ];
/* no break */
case 7:
TinyShuffle1( p_exs->p_bordel );
break;
case 8:
p_exs->p_bordel[ 7 ] ^= ((p_exs->p_bordel[ 1 ] + p_exs->p_bordel[ 5 ]) - p_exs->p_bordel[ 8 ]);
break;
case 9:
if( (p_exs->p_bordel[ 1 ] ^ p_exs->p_bordel[ 10 ]) > 0x6000 )
{
p_exs->p_bordel[ 11 ] += 1;
}
break;
}
}
static uint32_t ThirdPass( uint32_t * p_bordel )
{
uint32_t i_cmd, i_ret = 5;
i_cmd = ((p_bordel[ 7 ] + p_bordel[ 14 ] + 10) >> 1) - p_bordel[ 14 ];
i_cmd -= (((uint32_t)(((uint64_t)i_cmd * 0x0CCCCCCCD) >> 32)) >> 3) * 10;
switch( i_cmd )
{
case 0:
p_bordel[ 1 ] <<= 1;
p_bordel[ 2 ] <<= 2;
p_bordel[ 3 ] <<= 3;
break;
case 6:
p_bordel[ i_cmd + 3 ] &= 0x5EDE36B;
/* no break */
case 2:
while( i_cmd )
{
i_cmd -= 1;
p_bordel[ i_cmd ] += p_bordel[ i_cmd + 3 ];
}
i_ret--;
TinyShuffle2( p_bordel );
return i_ret;
case 3:
if( (p_bordel[ 11 ] & p_bordel[ 2 ]) > 0x211B )
{
p_bordel[ 6 ] += 1;
}
break;
case 4:
p_bordel[ 7 ] += 1;
/* no break */
case 5:
p_bordel[ 9 ] ^= p_bordel[ 2 ];
break;
case 7:
p_bordel[ 2 ] ^= (p_bordel[ 1 ] & p_bordel[ 13 ]);
break;
case 8:
p_bordel[ 0 ] -= p_bordel[ 11 ] & p_bordel[ 15 ];
i_ret--;
return i_ret;
case 9:
p_bordel[ 6 ] >>= (p_bordel[ 14 ] & 3);
break;
}
SWAP( p_bordel[ 0 ], p_bordel[ 10 ] );
TinyShuffle2( p_bordel );
return i_ret;
}
static void FourthPass( uint32_t * p_bordel, uint32_t i_jc )
{
uint32_t i, j;
uint32_t i_cmd;
i = (((p_bordel[ 9 ] + p_bordel[ 15 ] + 12) >> 2) - p_bordel[ 4 ]) & 7;
while( i-- )
{
SWAP( p_bordel[ i ], p_bordel[ i + 3 ] );
}
SWAP( p_bordel[ 10 ], p_bordel[ 1 ] );
i_cmd = p_bordel[ 5 ];
i_cmd -= (((uint32_t)(((uint64_t)i_cmd * 0x0CCCCCCCD) >> 32)) >> 2) * 5;
switch( i_cmd )
{
case 0:
p_bordel[ 0 ] += 1;
break;
case 2:
p_bordel[ 11 ] ^= (p_bordel[ 3 ] + p_bordel[ 6 ] + p_bordel[ 8 ]);
break;
case 3:
for( i = 4; i < 15; i++ )
{
if( p_bordel[ i ] & 5 )
{
break;
}
SWAP( p_bordel[ i ], p_bordel[ 15 - i ] );
}
break;
case 4:
if( i_jc )
{
p_bordel[ 12 ] -= 1;
p_bordel[ 13 ] += 1;
p_bordel[ 2 ] -= 0x64;
p_bordel[ 3 ] += 0x64;
return;
}
break;
}
for( i = 0, j = 0; i < 16; i++ )
{
if( p_bordel[ i ] > p_bordel[ j ] )
{
j = i;
}
}
i_cmd = p_bordel[ j ];
i_cmd -= (((uint32_t)(((uint64_t)i_cmd * 0x51EB851F) >> 32)) >> 5) * 0x64;
switch( i_cmd )
{
case 0x0:
SWAP( p_bordel[ j ], p_bordel[ 0 ] );
break;
case 0x8:
p_bordel[ 1 ] >>= 1;
p_bordel[ 2 ] <<= 1;
p_bordel[ 14 ] >>= 3;
p_bordel[ 15 ] <<= 4;
break;
case 0x39:
p_bordel[ j ] += p_bordel[ 13 ];
break;
case 0x4c:
if( i_jc )
{
p_bordel[ 1 ] += 0x20E;
p_bordel[ 5 ] += 0x223D;
p_bordel[ 13 ] -= 0x576;
p_bordel[ 15 ] += 0x576;
}
break;
case 0x5b:
p_bordel[ 2 ] -= 0x64;
p_bordel[ 3 ] += 0x64;
p_bordel[ 12 ] -= 1;
p_bordel[ 13 ] += 1;
break;
case 0x63:
p_bordel[ 0 ] += 1;
p_bordel[ j ] += p_bordel[ 13 ];
break;
}
}
static void FifthPass( uint32_t * p_bordel )
{
uint32_t i;
uint32_t i_cmd;
i = (p_bordel[ 0 ] & p_bordel[ 6 ]) & 0xF;
i_cmd = p_bordel[ i ];
i_cmd -= ((((uint32_t)(((uint64_t)i_cmd * 0x10624DD3) >> 32)) >> 6) * 0x3E8);
switch( i_cmd )
{
case 0x7:
if( (p_bordel[ i ] & 0x777) > (p_bordel[ 7 ] & 0x5555) )
{
p_bordel[ i ] ^= p_bordel[ 5 ] & p_bordel[ 3 ];
}
break;
case 0x13:
p_bordel[ 15 ] &= 0x5555;
break;
case 0x5d:
p_bordel[ i ] ^= p_bordel[ 15 ];
break;
case 0x64:
SWAP( p_bordel[ 0 ], p_bordel[ 1 ] );
SWAP( p_bordel[ 1 ], p_bordel[ 7 ] );
SWAP( p_bordel[ 4 ], p_bordel[ 9 ] );
SWAP( p_bordel[ 8 ], p_bordel[ 5 ] );
SWAP( p_bordel[ 6 ], p_bordel[ 1 ] );
SWAP( p_bordel[ 3 ], p_bordel[ 0 ] );
SWAP( p_bordel[ 13 ], p_bordel[ 14 ] );
break;
case 0x149:
p_bordel[ i ] += p_bordel[ 1 ] ^ 0x80080011;
p_bordel[ i ] += p_bordel[ 2 ] ^ 0xBEEFDEAD;
p_bordel[ i ] += p_bordel[ 3 ] ^ 0x8765F444;
p_bordel[ i ] += p_bordel[ 4 ] ^ 0x78145326;
break;
case 0x237:
p_bordel[ 12 ] -= p_bordel[ i ];
p_bordel[ 13 ] += p_bordel[ i ];
break;
case 0x264:
p_bordel[ i ] += p_bordel[ 1 ];
p_bordel[ i ] -= p_bordel[ 7 ];
p_bordel[ i ] -= p_bordel[ 8 ];
p_bordel[ i ] += p_bordel[ 9 ];
p_bordel[ i ] += p_bordel[ 13 ];
break;
case 0x2f2:
i = __MIN( i, 12 );
p_bordel[ i + 1 ] >>= 1;
p_bordel[ i + 2 ] <<= 4;
p_bordel[ i + 3 ] >>= 3;
break;
case 0x309:
p_bordel[ 1 ] += 0x20E;
p_bordel[ 5 ] += 0x223D;
p_bordel[ 13 ] -= 0x576;
p_bordel[ 15 ] += 0x576;
break;
case 0x3d5:
if( (p_bordel[ i ] ^ 0x8765F441) < 0x2710 )
{
SWAP( p_bordel[ 0 ], p_bordel[ 1 ] );
}
else
{
SWAP( p_bordel[ 1 ], p_bordel[ 11 ] );
}
break;
}
}
static void TinyShuffle1( uint32_t * p_bordel )
{
uint32_t i;
for( i = 0; i < 3; i++ )
{
switch( p_bordel[ 1 ] & 3 )
{
case 0:
p_bordel[ 1 ] += 1;
/* no break */
case 1:
p_bordel[ 3 ] -= 8;
break;
case 2:
p_bordel[ 13 ] &= 0xFEFEFEF7;
break;
case 3:
p_bordel[ 8 ] |= 0x80080011;
break;
}
}
}
static void TinyShuffle2( uint32_t * p_bordel )
{
uint32_t i;
for( i = 0; i < 8; i++ )
{
if( p_bordel[ 3 ] & 0x7514 )
{
SWAP( p_bordel[ i ], p_bordel[ i + 5 ] );
}
else
{
SWAP( p_bordel[ i ], p_bordel[ i + 7 ] );
}
}
}
/*****************************************************************************
* GetSystemKey: get the system key
*****************************************************************************
......@@ -919,7 +1746,7 @@ static int GetUserKey( void *_p_drms, uint32_t *p_user_key )
/* Decrypt and shuffle our data at the same time */
InitAES( &aes, p_sys_key );
REVERSE( p_sys_key, 4 );
InitShuffle( &shuffle, p_sys_key );
InitShuffle( &shuffle, p_sys_key, p_sci_data[ 0 ] );
memcpy( p_sci_key, p_secret, 16 );
REVERSE( p_sci_key, 4 );
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment