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Commit 0afcb97c authored by Rémi Duraffort's avatar Rémi Duraffort
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drms: remove duplicate code (this was done to reuse drms outside of vlc but it 

seems that noone is using it actually).
parent 005a7c47
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Showing with 5 additions and 220 deletions
modules/demux/mp4/drms.c
View file @ 0afcb97c
......@@ -22,18 +22,14 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef __LIBVLC__
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
# include <vlc_common.h>
# include <vlc_md5.h>
# include "libmp4.h"
# include <vlc_charset.h>
#else
# include "drmsvl.h"
#endif
#include <vlc_common.h>
#include <vlc_md5.h>
#include "libmp4.h"
#include <vlc_charset.h>
#ifdef WIN32
# include <io.h>
......@@ -88,22 +84,7 @@ struct aes_s
uint32_t pp_dec_keys[ AES_KEY_COUNT + 1 ][ 4 ];
};
#ifdef __LIBVLC__
# define Digest DigestMD5
#else
/*****************************************************************************
* md5_s: MD5 message structure
*****************************************************************************
* This structure stores the static information needed to compute an MD5
* hash. It has an extra data buffer to allow non-aligned writes.
*****************************************************************************/
struct md5_s
{
uint64_t i_bits; /* Total written bits */
uint32_t p_digest[4]; /* The MD5 digest */
uint32_t p_data[16]; /* Buffer to cache non-aligned writes */
};
#endif
#define Digest DigestMD5
/*****************************************************************************
* shuffle_s: shuffle structure
......@@ -144,13 +125,6 @@ struct drms_s
static void InitAES ( struct aes_s *, uint32_t * );
static void DecryptAES ( struct aes_s *, uint32_t *, const uint32_t * );
#ifndef __LIBVLC__
static void InitMD5 ( struct md5_s * );
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 * );
#endif
static void InitShuffle ( struct shuffle_s *, uint32_t *, uint32_t );
static void DoShuffle ( struct shuffle_s *, uint32_t *, uint32_t );
......@@ -507,195 +481,6 @@ static void DecryptAES( struct aes_s *p_aes,
}
}
#ifndef __LIBVLC__
/*****************************************************************************
* InitMD5: initialise an MD5 message
*****************************************************************************
* The MD5 message-digest algorithm is described in RFC 1321
*****************************************************************************/
static void InitMD5( struct md5_s *p_md5 )
{
p_md5->p_digest[ 0 ] = 0x67452301;
p_md5->p_digest[ 1 ] = 0xefcdab89;
p_md5->p_digest[ 2 ] = 0x98badcfe;
p_md5->p_digest[ 3 ] = 0x10325476;
memset( p_md5->p_data, 0, 64 );
p_md5->i_bits = 0;
}
/*****************************************************************************
* AddMD5: add i_len bytes to an MD5 message
*****************************************************************************/
static void AddMD5( struct md5_s *p_md5, const uint8_t *p_src, uint32_t i_len )
{
unsigned int i_current; /* Current bytes in the spare buffer */
unsigned int i_offset = 0;
i_current = (p_md5->i_bits / 8) & 63;
p_md5->i_bits += 8 * i_len;
/* If we can complete our spare buffer to 64 bytes, do it and add the
* resulting buffer to the MD5 message */
if( i_len >= (64 - i_current) )
{
memcpy( ((uint8_t *)p_md5->p_data) + i_current, p_src,
(64 - i_current) );
Digest( p_md5, p_md5->p_data );
i_offset += (64 - i_current);
i_len -= (64 - i_current);
i_current = 0;
}
/* Add as many entire 64 bytes blocks as we can to the MD5 message */
while( i_len >= 64 )
{
uint32_t p_tmp[ 16 ];
memcpy( p_tmp, p_src + i_offset, 64 );
Digest( p_md5, p_tmp );
i_offset += 64;
i_len -= 64;
}
/* Copy our remaining data to the message's spare buffer */
memcpy( ((uint8_t *)p_md5->p_data) + i_current, p_src + i_offset, i_len );
}
/*****************************************************************************
* EndMD5: finish an MD5 message
*****************************************************************************
* This function adds adequate padding to the end of the message, and appends
* the bit count so that we end at a block boundary.
*****************************************************************************/
static void EndMD5( struct md5_s *p_md5 )
{
unsigned int i_current;
i_current = (p_md5->i_bits / 8) & 63;
/* Append 0x80 to our buffer. No boundary check because the temporary
* buffer cannot be full, otherwise AddMD5 would have emptied it. */
((uint8_t *)p_md5->p_data)[ i_current++ ] = 0x80;
/* If less than 8 bytes are available at the end of the block, complete
* this 64 bytes block with zeros and add it to the message. We'll add
* our length at the end of the next block. */
if( i_current > 56 )
{
memset( ((uint8_t *)p_md5->p_data) + i_current, 0, (64 - i_current) );
Digest( p_md5, p_md5->p_data );
i_current = 0;
}
/* Fill the unused space in our last block with zeroes and put the
* message length at the end. */
memset( ((uint8_t *)p_md5->p_data) + i_current, 0, (56 - i_current) );
p_md5->p_data[ 14 ] = p_md5->i_bits & 0xffffffff;
p_md5->p_data[ 15 ] = (p_md5->i_bits >> 32);
REVERSE( &p_md5->p_data[ 14 ], 2 );
Digest( p_md5, p_md5->p_data );
}
#define F1( x, y, z ) ((z) ^ ((x) & ((y) ^ (z))))
#define F2( x, y, z ) F1((z), (x), (y))
#define F3( x, y, z ) ((x) ^ (y) ^ (z))
#define F4( x, y, z ) ((y) ^ ((x) | ~(z)))
#define MD5_DO( f, w, x, y, z, data, s ) \
( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
/*****************************************************************************
* Digest: update the MD5 digest with 64 bytes of data
*****************************************************************************/
static void Digest( struct md5_s *p_md5, uint32_t *p_input )
{
uint32_t a, b, c, d;
REVERSE( p_input, 16 );
a = p_md5->p_digest[ 0 ];
b = p_md5->p_digest[ 1 ];
c = p_md5->p_digest[ 2 ];
d = p_md5->p_digest[ 3 ];
MD5_DO( F1, a, b, c, d, p_input[ 0 ] + 0xd76aa478, 7 );
MD5_DO( F1, d, a, b, c, p_input[ 1 ] + 0xe8c7b756, 12 );
MD5_DO( F1, c, d, a, b, p_input[ 2 ] + 0x242070db, 17 );
MD5_DO( F1, b, c, d, a, p_input[ 3 ] + 0xc1bdceee, 22 );
MD5_DO( F1, a, b, c, d, p_input[ 4 ] + 0xf57c0faf, 7 );
MD5_DO( F1, d, a, b, c, p_input[ 5 ] + 0x4787c62a, 12 );
MD5_DO( F1, c, d, a, b, p_input[ 6 ] + 0xa8304613, 17 );
MD5_DO( F1, b, c, d, a, p_input[ 7 ] + 0xfd469501, 22 );
MD5_DO( F1, a, b, c, d, p_input[ 8 ] + 0x698098d8, 7 );
MD5_DO( F1, d, a, b, c, p_input[ 9 ] + 0x8b44f7af, 12 );
MD5_DO( F1, c, d, a, b, p_input[ 10 ] + 0xffff5bb1, 17 );
MD5_DO( F1, b, c, d, a, p_input[ 11 ] + 0x895cd7be, 22 );
MD5_DO( F1, a, b, c, d, p_input[ 12 ] + 0x6b901122, 7 );
MD5_DO( F1, d, a, b, c, p_input[ 13 ] + 0xfd987193, 12 );
MD5_DO( F1, c, d, a, b, p_input[ 14 ] + 0xa679438e, 17 );
MD5_DO( F1, b, c, d, a, p_input[ 15 ] + 0x49b40821, 22 );
MD5_DO( F2, a, b, c, d, p_input[ 1 ] + 0xf61e2562, 5 );
MD5_DO( F2, d, a, b, c, p_input[ 6 ] + 0xc040b340, 9 );
MD5_DO( F2, c, d, a, b, p_input[ 11 ] + 0x265e5a51, 14 );
MD5_DO( F2, b, c, d, a, p_input[ 0 ] + 0xe9b6c7aa, 20 );
MD5_DO( F2, a, b, c, d, p_input[ 5 ] + 0xd62f105d, 5 );
MD5_DO( F2, d, a, b, c, p_input[ 10 ] + 0x02441453, 9 );
MD5_DO( F2, c, d, a, b, p_input[ 15 ] + 0xd8a1e681, 14 );
MD5_DO( F2, b, c, d, a, p_input[ 4 ] + 0xe7d3fbc8, 20 );
MD5_DO( F2, a, b, c, d, p_input[ 9 ] + 0x21e1cde6, 5 );
MD5_DO( F2, d, a, b, c, p_input[ 14 ] + 0xc33707d6, 9 );
MD5_DO( F2, c, d, a, b, p_input[ 3 ] + 0xf4d50d87, 14 );
MD5_DO( F2, b, c, d, a, p_input[ 8 ] + 0x455a14ed, 20 );
MD5_DO( F2, a, b, c, d, p_input[ 13 ] + 0xa9e3e905, 5 );
MD5_DO( F2, d, a, b, c, p_input[ 2 ] + 0xfcefa3f8, 9 );
MD5_DO( F2, c, d, a, b, p_input[ 7 ] + 0x676f02d9, 14 );
MD5_DO( F2, b, c, d, a, p_input[ 12 ] + 0x8d2a4c8a, 20 );
MD5_DO( F3, a, b, c, d, p_input[ 5 ] + 0xfffa3942, 4 );
MD5_DO( F3, d, a, b, c, p_input[ 8 ] + 0x8771f681, 11 );
MD5_DO( F3, c, d, a, b, p_input[ 11 ] + 0x6d9d6122, 16 );
MD5_DO( F3, b, c, d, a, p_input[ 14 ] + 0xfde5380c, 23 );
MD5_DO( F3, a, b, c, d, p_input[ 1 ] + 0xa4beea44, 4 );
MD5_DO( F3, d, a, b, c, p_input[ 4 ] + 0x4bdecfa9, 11 );
MD5_DO( F3, c, d, a, b, p_input[ 7 ] + 0xf6bb4b60, 16 );
MD5_DO( F3, b, c, d, a, p_input[ 10 ] + 0xbebfbc70, 23 );
MD5_DO( F3, a, b, c, d, p_input[ 13 ] + 0x289b7ec6, 4 );
MD5_DO( F3, d, a, b, c, p_input[ 0 ] + 0xeaa127fa, 11 );
MD5_DO( F3, c, d, a, b, p_input[ 3 ] + 0xd4ef3085, 16 );
MD5_DO( F3, b, c, d, a, p_input[ 6 ] + 0x04881d05, 23 );
MD5_DO( F3, a, b, c, d, p_input[ 9 ] + 0xd9d4d039, 4 );
MD5_DO( F3, d, a, b, c, p_input[ 12 ] + 0xe6db99e5, 11 );
MD5_DO( F3, c, d, a, b, p_input[ 15 ] + 0x1fa27cf8, 16 );
MD5_DO( F3, b, c, d, a, p_input[ 2 ] + 0xc4ac5665, 23 );
MD5_DO( F4, a, b, c, d, p_input[ 0 ] + 0xf4292244, 6 );
MD5_DO( F4, d, a, b, c, p_input[ 7 ] + 0x432aff97, 10 );
MD5_DO( F4, c, d, a, b, p_input[ 14 ] + 0xab9423a7, 15 );
MD5_DO( F4, b, c, d, a, p_input[ 5 ] + 0xfc93a039, 21 );
MD5_DO( F4, a, b, c, d, p_input[ 12 ] + 0x655b59c3, 6 );
MD5_DO( F4, d, a, b, c, p_input[ 3 ] + 0x8f0ccc92, 10 );
MD5_DO( F4, c, d, a, b, p_input[ 10 ] + 0xffeff47d, 15 );
MD5_DO( F4, b, c, d, a, p_input[ 1 ] + 0x85845dd1, 21 );
MD5_DO( F4, a, b, c, d, p_input[ 8 ] + 0x6fa87e4f, 6 );
MD5_DO( F4, d, a, b, c, p_input[ 15 ] + 0xfe2ce6e0, 10 );
MD5_DO( F4, c, d, a, b, p_input[ 6 ] + 0xa3014314, 15 );
MD5_DO( F4, b, c, d, a, p_input[ 13 ] + 0x4e0811a1, 21 );
MD5_DO( F4, a, b, c, d, p_input[ 4 ] + 0xf7537e82, 6 );
MD5_DO( F4, d, a, b, c, p_input[ 11 ] + 0xbd3af235, 10 );
MD5_DO( F4, c, d, a, b, p_input[ 2 ] + 0x2ad7d2bb, 15 );
MD5_DO( F4, b, c, d, a, p_input[ 9 ] + 0xeb86d391, 21 );
p_md5->p_digest[ 0 ] += a;
p_md5->p_digest[ 1 ] += b;
p_md5->p_digest[ 2 ] += c;
p_md5->p_digest[ 3 ] += d;
}
#endif
/*****************************************************************************
* InitShuffle: initialise a shuffle structure
*****************************************************************************
......
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