[libdvdcss-devel] [PATCH 4/5] Replace duplicate KEY_SIZE define by DVD_KEY_SIZE.
Diego Biurrun
diego at biurrun.de
Fri Nov 7 21:57:45 CET 2014
---
src/css.c | 60 ++++++++++++++++++++++++++++-----------------------------
src/css.h | 4 ++--
src/ioctl.c | 1 +
src/ioctl.h | 1 -
src/libdvdcss.c | 6 +++---
5 files changed, 36 insertions(+), 36 deletions(-)
diff --git a/src/css.c b/src/css.c
index ccd4989..db438e7 100644
--- a/src/css.c
+++ b/src/css.c
@@ -61,7 +61,7 @@
#include "ioctl.h"
#include "device.h"
-#define PSZ_KEY_SIZE (KEY_SIZE * 3)
+#define PSZ_KEY_SIZE (DVD_KEY_SIZE * 3)
/*****************************************************************************
* Local prototypes
@@ -303,7 +303,7 @@ int dvdcss_title ( struct dvdcss *dvdcss, int i_block )
return -1;
}
p_newtitle->i_startlb = i_block;
- memcpy( p_newtitle->p_key, p_title_key, KEY_SIZE );
+ memcpy( p_newtitle->p_key, p_title_key, DVD_KEY_SIZE );
/* Link it at the head of the (possibly empty) list */
if( p_title == NULL )
@@ -318,7 +318,7 @@ int dvdcss_title ( struct dvdcss *dvdcss, int i_block )
p_title->p_next = p_newtitle;
}
- memcpy( dvdcss->css.p_title_key, p_title_key, KEY_SIZE );
+ memcpy( dvdcss->css.p_title_key, p_title_key, DVD_KEY_SIZE );
return 0;
}
@@ -363,7 +363,7 @@ int dvdcss_disckey( struct dvdcss *dvdcss )
/* Shuffle disc key using bus key */
for( i = 0 ; i < DVD_DISCKEY_SIZE ; i++ )
{
- p_buffer[ i ] ^= dvdcss->css.p_bus_key[ 4 - (i % KEY_SIZE) ];
+ p_buffer[i] ^= dvdcss->css.p_bus_key[4 - (i % DVD_KEY_SIZE)];
}
/* Decrypt disc key */
@@ -383,14 +383,14 @@ int dvdcss_disckey( struct dvdcss *dvdcss )
"cracking title keys instead" );
/* Fallback, but not to DISC as the disc key might be faulty */
- memset( p_disc_key, 0, KEY_SIZE );
+ memset( p_disc_key, 0, DVD_KEY_SIZE );
dvdcss->i_method = DVDCSS_METHOD_TITLE;
break;
case DVDCSS_METHOD_DISC:
/* Crack Disc key to be able to use it */
- memcpy( p_disc_key, p_buffer, KEY_SIZE );
+ memcpy( p_disc_key, p_buffer, DVD_KEY_SIZE );
PrintKey( dvdcss, "cracking disc key ", p_disc_key );
if( ! CrackDiscKey( dvdcss, p_disc_key ) )
{
@@ -398,18 +398,18 @@ int dvdcss_disckey( struct dvdcss *dvdcss )
break;
}
print_debug( dvdcss, "failed to crack the disc key" );
- memset( p_disc_key, 0, KEY_SIZE );
+ memset( p_disc_key, 0, DVD_KEY_SIZE );
dvdcss->i_method = DVDCSS_METHOD_TITLE;
break;
default:
print_debug( dvdcss, "disc key needs not be decrypted" );
- memset( p_disc_key, 0, KEY_SIZE );
+ memset( p_disc_key, 0, DVD_KEY_SIZE );
break;
}
- memcpy( dvdcss->css.p_disc_key, p_disc_key, KEY_SIZE );
+ memcpy( dvdcss->css.p_disc_key, p_disc_key, DVD_KEY_SIZE );
return 0;
}
@@ -421,7 +421,7 @@ int dvdcss_disckey( struct dvdcss *dvdcss )
static int dvdcss_titlekey( struct dvdcss *dvdcss, int i_pos, dvd_key p_title_key )
{
static uint8_t p_garbage[ DVDCSS_BLOCK_SIZE ]; /* we never read it back */
- uint8_t p_key[ KEY_SIZE ];
+ uint8_t p_key[DVD_KEY_SIZE];
int i, i_ret = 0;
if( dvdcss->b_ioctls && ( dvdcss->i_method == DVDCSS_METHOD_KEY ||
@@ -480,9 +480,9 @@ static int dvdcss_titlekey( struct dvdcss *dvdcss, int i_pos, dvd_key p_title_ke
if( !( i_ret < 0 ) )
{
/* Decrypt title key using the bus key */
- for( i = 0 ; i < KEY_SIZE ; i++ )
+ for( i = 0 ; i < DVD_KEY_SIZE ; i++ )
{
- p_key[ i ] ^= dvdcss->css.p_bus_key[ 4 - (i % KEY_SIZE) ];
+ p_key[i] ^= dvdcss->css.p_bus_key[4 - (i % DVD_KEY_SIZE)];
}
/* If p_key is all zero then there really wasn't any key present
@@ -500,7 +500,7 @@ static int dvdcss_titlekey( struct dvdcss *dvdcss, int i_pos, dvd_key p_title_ke
}
/* All went well either there wasn't a key or we have it now. */
- memcpy( p_title_key, p_key, KEY_SIZE );
+ memcpy( p_title_key, p_key, DVD_KEY_SIZE );
PrintKey( dvdcss, "title key is ", p_title_key );
return i_ret;
@@ -524,7 +524,7 @@ static int dvdcss_titlekey( struct dvdcss *dvdcss, int i_pos, dvd_key p_title_ke
/* For now, the read limit is 9GB / 2048 = 4718592 sectors. */
i_ret = CrackTitleKey( dvdcss, i_pos, 4718592, p_key );
- memcpy( p_title_key, p_key, KEY_SIZE );
+ memcpy( p_title_key, p_key, DVD_KEY_SIZE );
PrintKey( dvdcss, "title key is ", p_title_key );
return i_ret;
@@ -591,7 +591,7 @@ int dvdcss_unscramble( const dvd_key p_key, uint8_t *p_sec )
static int GetBusKey( struct dvdcss *dvdcss )
{
uint8_t p_buffer[10];
- uint8_t p_challenge[2*KEY_SIZE];
+ uint8_t p_challenge[2 * DVD_KEY_SIZE];
dvd_key p_key1;
dvd_key p_key2;
dvd_key p_key_check;
@@ -657,7 +657,7 @@ static int GetBusKey( struct dvdcss *dvdcss )
}
/* Send key1 to host */
- for( i = 0 ; i < KEY_SIZE ; i++ )
+ for( i = 0 ; i < DVD_KEY_SIZE ; i++ )
{
p_key1[i] = p_buffer[4-i];
}
@@ -666,7 +666,7 @@ static int GetBusKey( struct dvdcss *dvdcss )
{
CryptKey( 0, i, p_challenge, p_key_check );
- if( memcmp( p_key_check, p_key1, KEY_SIZE ) == 0 )
+ if( memcmp( p_key_check, p_key1, DVD_KEY_SIZE ) == 0 )
{
print_debug( dvdcss, "drive authenticated, using variant %d", i );
i_variant = i;
@@ -699,7 +699,7 @@ static int GetBusKey( struct dvdcss *dvdcss )
CryptKey( 1, i_variant, p_challenge, p_key2 );
/* Get key2 from host */
- for( i = 0 ; i < KEY_SIZE ; ++i )
+ for( i = 0 ; i < DVD_KEY_SIZE ; ++i )
{
p_buffer[4-i] = p_key2[i];
}
@@ -715,8 +715,8 @@ static int GetBusKey( struct dvdcss *dvdcss )
/* The drive has accepted us as authentic. */
print_debug( dvdcss, "authentication established" );
- memcpy( p_challenge, p_key1, KEY_SIZE );
- memcpy( p_challenge + KEY_SIZE, p_key2, KEY_SIZE );
+ memcpy( p_challenge, p_key1, DVD_KEY_SIZE );
+ memcpy( p_challenge + DVD_KEY_SIZE, p_key2, DVD_KEY_SIZE );
CryptKey( 2, i_variant, p_challenge, dvdcss->css.p_bus_key );
@@ -1000,7 +1000,7 @@ static void DecryptKey( uint8_t invert, const uint8_t *p_key,
p_css_tab4[( i_lfsr0 >> 24 ) & 0xff];
i_combined = 0;
- for( i = 0 ; i < KEY_SIZE ; ++i )
+ for( i = 0 ; i < DVD_KEY_SIZE ; ++i )
{
o_lfsr1 = p_css_tab2[i_lfsr1_hi] ^ p_css_tab3[i_lfsr1_lo];
i_lfsr1_hi = i_lfsr1_lo >> 1;
@@ -1085,7 +1085,7 @@ static int DecryptDiscKey( const struct dvdcss *dvdcss,
const uint8_t *p_struct_disckey,
dvd_key p_disc_key )
{
- uint8_t p_verify[KEY_SIZE];
+ uint8_t p_verify[DVD_KEY_SIZE];
unsigned int i, n = 0;
/* Decrypt disc key with the above player keys */
@@ -1105,7 +1105,7 @@ static int DecryptDiscKey( const struct dvdcss *dvdcss,
DecryptKey( 0, p_disc_key, p_struct_disckey, p_verify );
/* If the position / player key pair worked then return. */
- if( memcmp( p_disc_key, p_verify, KEY_SIZE ) == 0 )
+ if( memcmp( p_disc_key, p_verify, DVD_KEY_SIZE ) == 0 )
{
return 0;
}
@@ -1114,7 +1114,7 @@ static int DecryptDiscKey( const struct dvdcss *dvdcss,
/* Have tried all combinations of positions and keys,
* and we still didn't succeed. */
- memset( p_disc_key, 0, KEY_SIZE );
+ memset( p_disc_key, 0, DVD_KEY_SIZE );
return -1;
}
@@ -1144,11 +1144,11 @@ static void DecryptTitleKey( const dvd_key p_disc_key, dvd_key p_titlekey )
*/
static int investigate( const unsigned char *hash, const unsigned char *ckey )
{
- unsigned char key[KEY_SIZE];
+ unsigned char key[DVD_KEY_SIZE];
DecryptKey( 0, ckey, hash, key );
- return memcmp( key, ckey, KEY_SIZE );
+ return memcmp( key, ckey, DVD_KEY_SIZE );
}
static int CrackDiscKey( const struct dvdcss *dvdcss, uint8_t *p_disc_key )
@@ -1329,7 +1329,7 @@ static int CrackDiscKey( const struct dvdcss *dvdcss, uint8_t *p_disc_key )
end:
- memcpy( p_disc_key, &C[0], KEY_SIZE );
+ memcpy( p_disc_key, &C[0], DVD_KEY_SIZE );
free( K1table );
free( BigTable );
@@ -1604,12 +1604,12 @@ static int CrackTitleKey( struct dvdcss *dvdcss, int i_pos, int i_len,
if( i_encrypted == 0 && i_reads > 0 )
{
- memset( p_titlekey, 0, KEY_SIZE );
+ memset( p_titlekey, 0, DVD_KEY_SIZE );
print_debug( dvdcss, "no scrambled sectors found" );
return 0;
}
- memset( p_titlekey, 0, KEY_SIZE );
+ memset( p_titlekey, 0, DVD_KEY_SIZE );
return -1;
}
@@ -1653,7 +1653,7 @@ static int AttackPattern( const uint8_t p_sec[ DVDCSS_BLOCK_SIZE ],
int res;
i_tries++;
- memset( p_key, 0, KEY_SIZE );
+ memset( p_key, 0, DVD_KEY_SIZE );
res = RecoverTitleKey( 0, &p_sec[0x80],
&p_sec[ 0x80 - (i_best_plen / i_best_p) * i_best_p ],
&p_sec[0x54] /* key_seed */, p_key );
diff --git a/src/css.h b/src/css.h
index 9804bdf..7178efd 100644
--- a/src/css.h
+++ b/src/css.h
@@ -35,9 +35,9 @@
#define CACHE_FILENAME_LENGTH 10
#define CACHE_FILENAME_LENGTH_STRING "10"
-#define KEY_SIZE 5
+#define DVD_KEY_SIZE 5
-typedef uint8_t dvd_key[KEY_SIZE];
+typedef uint8_t dvd_key[DVD_KEY_SIZE];
typedef struct dvd_title
{
diff --git a/src/ioctl.c b/src/ioctl.c
index 1c6f51a..d30df78 100644
--- a/src/ioctl.c
+++ b/src/ioctl.c
@@ -85,6 +85,7 @@
#include "dvdcss/dvdcss.h"
#include "common.h"
+#include "css.h"
#include "ioctl.h"
#define DVD_CHALLENGE_SIZE 10
diff --git a/src/ioctl.h b/src/ioctl.h
index ded1d3c..77e8be0 100644
--- a/src/ioctl.h
+++ b/src/ioctl.h
@@ -37,7 +37,6 @@ int ioctl_SendChallenge ( int, const int *, const uint8_t * );
int ioctl_SendKey2 ( int, const int *, const uint8_t * );
int ioctl_ReportRPC ( int, int *, int *, int * );
-#define DVD_KEY_SIZE 5
#define DVD_DISCKEY_SIZE 2048
/*****************************************************************************
diff --git a/src/libdvdcss.c b/src/libdvdcss.c
index d86b24a..5d59a86 100644
--- a/src/libdvdcss.c
+++ b/src/libdvdcss.c
@@ -137,7 +137,7 @@
#endif
-#define STRING_KEY_SIZE (KEY_SIZE * 2)
+#define STRING_KEY_SIZE (DVD_KEY_SIZE * 2)
#define INTERESTING_SECTOR 16
#define DISC_TITLE_OFFSET 40
#define DISC_TITLE_LENGTH 32
@@ -390,7 +390,7 @@ static void create_cache_subdir( struct dvdcss *dvdcss, const char *psz_cache )
* date and serial number, but different keys. */
if( dvdcss->b_scrambled )
{
- for( i = 0; i < KEY_SIZE; i++ )
+ for( i = 0; i < DVD_KEY_SIZE; i++ )
{
sprintf( &psz_key[i * 2], "%.2x", dvdcss->css.p_disc_key[i] );
}
@@ -520,7 +520,7 @@ LIBDVDCSS_EXPORT struct dvdcss *dvdcss_open ( const char *psz_target )
}
}
- memset( dvdcss->css.p_disc_key, 0, KEY_SIZE );
+ memset( dvdcss->css.p_disc_key, 0, DVD_KEY_SIZE );
/* If disc is CSS protected and the ioctls work, authenticate the drive */
if( dvdcss->b_scrambled && dvdcss->b_ioctls )
{
--
2.1.0
More information about the libdvdcss-devel
mailing list