/***************************************************************************** * drms.c : DRMS ***************************************************************************** * Copyright (C) 2004 VideoLAN * $Id: drms.c,v 1.4 2004/01/09 17:29:17 jlj Exp $ * * Author: Jon Lech Johansen * * 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 /* malloc(), free() */ #ifdef WIN32 #include #else #include #endif #include #ifdef HAVE_ERRNO_H #include #endif #ifdef WIN32 #include #include #include #endif #include "drms.h" #include "aes_tables.h" #include "libmp4.h" struct md5_s { uint32_t p_len[2]; uint32_t p_digest[4]; uint32_t p_data[16]; uint32_t p_digest_save[4]; uint32_t p_save[2]; }; static void md5_init( 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_len, 0, 2 * sizeof(uint32_t) ); memset( p_md5->p_data, 0, 16 * sizeof(uint32_t) ); memset( p_md5->p_digest_save, 0, 4 * sizeof(uint32_t) ); memset( p_md5->p_save, 0, 2 * sizeof(uint32_t) ); } #define ROR( x, n ) (((x) << (32-(n))) | ((x) >> (n))) static void init_ctx( uint32_t *p_ctx, uint32_t *p_input ) { uint32_t i, i_tmp; 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 ); i_tmp = p_ctx[ 1 + 3 ]; for( i = 0; i < sizeof(p_drms_tab1)/sizeof(p_drms_tab1[ 0 ]); i++ ) { uint32_t j; i_tmp = ROR( i_tmp, 8 ); j = p_drms_tab2[ (i_tmp >> 24) & 0xFF ] ^ ROR( p_drms_tab2[ (i_tmp >> 16) & 0xFF ], 8 ) ^ ROR( p_drms_tab2[ (i_tmp >> 8) & 0xFF ], 16 ) ^ ROR( p_drms_tab2[ i_tmp & 0xFF ], 24 ) ^ p_drms_tab1[ i ] ^ p_ctx[ 1 + ((i + 1) * 4) - 4 ]; p_ctx[ 1 + ((i + 1) * 4) + 0 ] = j; j ^= p_ctx[ 1 + ((i + 1) * 4) - 3 ]; p_ctx[ 1 + ((i + 1) * 4) + 1 ] = j; j ^= p_ctx[ 1 + ((i + 1) * 4) - 2 ]; p_ctx[ 1 + ((i + 1) * 4) + 2 ] = j; j ^= p_ctx[ 1 + ((i + 1) * 4) - 1 ]; p_ctx[ 1 + ((i + 1) * 4) + 3 ] = j; i_tmp = j; } memcpy( p_ctx + 1 + 64, p_ctx + 1, sizeof(*p_ctx) * 4 ); for( i = 4; i < sizeof(p_drms_tab1); i++ ) { uint32_t j, k, l, m, n; j = p_ctx[ 1 + 4 + (i - 4) ]; k = (((j >> 7) & 0x01010101) * 27) ^ ((j & 0xFF7F7F7F) << 1); l = (((k >> 7) & 0x01010101) * 27) ^ ((k & 0xFF7F7F7F) << 1); m = (((l >> 7) & 0x01010101) * 27) ^ ((l & 0xFF7F7F7F) << 1); j ^= m; n = ROR( l ^ j, 16 ) ^ ROR( k ^ j, 8 ) ^ ROR( j, 24 ); p_ctx[ 1 + 4 + 64 + (i - 4) ] = k ^ l ^ m ^ n; } } 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 + 0 ] ^ p_in[ 0 ]; p_tmp1[ 1 ] = p_ctx[ 1 + i + 24 + 1 ] ^ p_in[ 1 ]; p_tmp1[ 2 ] = p_ctx[ 1 + i + 24 + 2 ] ^ p_in[ 2 ]; p_tmp1[ 3 ] = p_ctx[ 1 + i + 24 + 3 ] ^ 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 } #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 DO_MD5( f, w, x, y, z, data, s ) \ ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) static void md5_transform( uint32_t *p_digest, const uint32_t *p_input ) { uint32_t a, b, c, d; a = p_digest[ 0 ]; b = p_digest[ 1 ]; c = p_digest[ 2 ]; d = p_digest[ 3 ]; DO_MD5( F1, a, b, c, d, p_input[ 0 ] + 0xd76aa478, 7 ); DO_MD5( F1, d, a, b, c, p_input[ 1 ] + 0xe8c7b756, 12 ); DO_MD5( F1, c, d, a, b, p_input[ 2 ] + 0x242070db, 17 ); DO_MD5( F1, b, c, d, a, p_input[ 3 ] + 0xc1bdceee, 22 ); DO_MD5( F1, a, b, c, d, p_input[ 4 ] + 0xf57c0faf, 7 ); DO_MD5( F1, d, a, b, c, p_input[ 5 ] + 0x4787c62a, 12 ); DO_MD5( F1, c, d, a, b, p_input[ 6 ] + 0xa8304613, 17 ); DO_MD5( F1, b, c, d, a, p_input[ 7 ] + 0xfd469501, 22 ); DO_MD5( F1, a, b, c, d, p_input[ 8 ] + 0x698098d8, 7 ); DO_MD5( F1, d, a, b, c, p_input[ 9 ] + 0x8b44f7af, 12 ); DO_MD5( F1, c, d, a, b, p_input[ 10 ] + 0xffff5bb1, 17 ); DO_MD5( F1, b, c, d, a, p_input[ 11 ] + 0x895cd7be, 22 ); DO_MD5( F1, a, b, c, d, p_input[ 12 ] + 0x6b901122, 7 ); DO_MD5( F1, d, a, b, c, p_input[ 13 ] + 0xfd987193, 12 ); DO_MD5( F1, c, d, a, b, p_input[ 14 ] + 0xa679438e, 17 ); DO_MD5( F1, b, c, d, a, p_input[ 15 ] + 0x49b40821, 22 ); DO_MD5( F2, a, b, c, d, p_input[ 1 ] + 0xf61e2562, 5 ); DO_MD5( F2, d, a, b, c, p_input[ 6 ] + 0xc040b340, 9 ); DO_MD5( F2, c, d, a, b, p_input[ 11 ] + 0x265e5a51, 14 ); DO_MD5( F2, b, c, d, a, p_input[ 0 ] + 0xe9b6c7aa, 20 ); DO_MD5( F2, a, b, c, d, p_input[ 5 ] + 0xd62f105d, 5 ); DO_MD5( F2, d, a, b, c, p_input[ 10 ] + 0x02441453, 9 ); DO_MD5( F2, c, d, a, b, p_input[ 15 ] + 0xd8a1e681, 14 ); DO_MD5( F2, b, c, d, a, p_input[ 4 ] + 0xe7d3fbc8, 20 ); DO_MD5( F2, a, b, c, d, p_input[ 9 ] + 0x21e1cde6, 5 ); DO_MD5( F2, d, a, b, c, p_input[ 14 ] + 0xc33707d6, 9 ); DO_MD5( F2, c, d, a, b, p_input[ 3 ] + 0xf4d50d87, 14 ); DO_MD5( F2, b, c, d, a, p_input[ 8 ] + 0x455a14ed, 20 ); DO_MD5( F2, a, b, c, d, p_input[ 13 ] + 0xa9e3e905, 5 ); DO_MD5( F2, d, a, b, c, p_input[ 2 ] + 0xfcefa3f8, 9 ); DO_MD5( F2, c, d, a, b, p_input[ 7 ] + 0x676f02d9, 14 ); DO_MD5( F2, b, c, d, a, p_input[ 12 ] + 0x8d2a4c8a, 20 ); DO_MD5( F3, a, b, c, d, p_input[ 5 ] + 0xfffa3942, 4 ); DO_MD5( F3, d, a, b, c, p_input[ 8 ] + 0x8771f681, 11 ); DO_MD5( F3, c, d, a, b, p_input[ 11 ] + 0x6d9d6122, 16 ); DO_MD5( F3, b, c, d, a, p_input[ 14 ] + 0xfde5380c, 23 ); DO_MD5( F3, a, b, c, d, p_input[ 1 ] + 0xa4beea44, 4 ); DO_MD5( F3, d, a, b, c, p_input[ 4 ] + 0x4bdecfa9, 11 ); DO_MD5( F3, c, d, a, b, p_input[ 7 ] + 0xf6bb4b60, 16 ); DO_MD5( F3, b, c, d, a, p_input[ 10 ] + 0xbebfbc70, 23 ); DO_MD5( F3, a, b, c, d, p_input[ 13 ] + 0x289b7ec6, 4 ); DO_MD5( F3, d, a, b, c, p_input[ 0 ] + 0xeaa127fa, 11 ); DO_MD5( F3, c, d, a, b, p_input[ 3 ] + 0xd4ef3085, 16 ); DO_MD5( F3, b, c, d, a, p_input[ 6 ] + 0x04881d05, 23 ); DO_MD5( F3, a, b, c, d, p_input[ 9 ] + 0xd9d4d039, 4 ); DO_MD5( F3, d, a, b, c, p_input[ 12 ] + 0xe6db99e5, 11 ); DO_MD5( F3, c, d, a, b, p_input[ 15 ] + 0x1fa27cf8, 16 ); DO_MD5( F3, b, c, d, a, p_input[ 2 ] + 0xc4ac5665, 23 ); DO_MD5( F4, a, b, c, d, p_input[ 0 ] + 0xf4292244, 6 ); DO_MD5( F4, d, a, b, c, p_input[ 7 ] + 0x432aff97, 10 ); DO_MD5( F4, c, d, a, b, p_input[ 14 ] + 0xab9423a7, 15 ); DO_MD5( F4, b, c, d, a, p_input[ 5 ] + 0xfc93a039, 21 ); DO_MD5( F4, a, b, c, d, p_input[ 12 ] + 0x655b59c3, 6 ); DO_MD5( F4, d, a, b, c, p_input[ 3 ] + 0x8f0ccc92, 10 ); DO_MD5( F4, c, d, a, b, p_input[ 10 ] + 0xffeff47d, 15 ); DO_MD5( F4, b, c, d, a, p_input[ 1 ] + 0x85845dd1, 21 ); DO_MD5( F4, a, b, c, d, p_input[ 8 ] + 0x6fa87e4f, 6 ); DO_MD5( F4, d, a, b, c, p_input[ 15 ] + 0xfe2ce6e0, 10 ); DO_MD5( F4, c, d, a, b, p_input[ 6 ] + 0xa3014314, 15 ); DO_MD5( F4, b, c, d, a, p_input[ 13 ] + 0x4e0811a1, 21 ); DO_MD5( F4, a, b, c, d, p_input[ 4 ] + 0xf7537e82, 6 ); DO_MD5( F4, d, a, b, c, p_input[ 11 ] + 0xbd3af235, 10 ); DO_MD5( F4, c, d, a, b, p_input[ 2 ] + 0x2ad7d2bb, 15 ); DO_MD5( F4, b, c, d, a, p_input[ 9 ] + 0xeb86d391, 21 ); p_digest[ 0 ] += a; p_digest[ 1 ] += b; p_digest[ 2 ] += c; p_digest[ 3 ] += d; } static void md5_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 ); md5_transform( 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) ); md5_transform( 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 md5_end1( struct md5_s *p_md5, uint32_t *p_out ) { uint32_t x, y; x = p_md5->p_len[ 0 ] & 63; y = 63 - x; ((uint8_t *)p_md5->p_data)[ x++ ] = 128; if( y < 8 ) { memset( ((uint8_t *)p_md5->p_data) + x, 0, y ); md5_transform( p_md5->p_digest, p_md5->p_data ); y = 64; x = 0; } memset( ((uint8_t *)p_md5->p_data) + x, 0, y ); p_md5->p_save[ 0 ] = p_md5->p_len[ 0 ] * 8; p_md5->p_save[ 1 ] = p_md5->p_len[ 0 ] >> 29; md5_transform( p_md5->p_digest, p_md5->p_data ); memcpy( p_out, p_md5->p_digest, sizeof(*p_out) * 4 ); } static void md5_add2( struct md5_s *p_md5, uint8_t *p_in, uint32_t i_len ) { uint32_t i, x; uint32_t p_tmp[ 16 ]; x = (p_md5->p_len[ 0 ] / 8) & 63; i = p_md5->p_len[ 0 ] + i_len * 8; if( i < p_md5->p_len[ 0 ] ) { p_md5->p_len[ 1 ] += 1; } p_md5->p_len[ 0 ] = i; p_md5->p_len[ 1 ] += i_len >> 29; for( i = 0; i < i_len; i++ ) { ((uint8_t *)p_md5->p_data)[ x++ ] = p_in[ i ]; if( x != 64 ) continue; memcpy( p_tmp, p_md5->p_data, sizeof(p_tmp) ); md5_transform( p_md5->p_digest, p_tmp ); } } static void md5_add2e( struct md5_s *p_md5, 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); } } } md5_add2( p_md5, (uint8_t *)p_tmp, i_len * sizeof(p_tmp[ 0 ]) ); } static void md5_end2( struct md5_s *p_md5 ) { uint32_t x; uint32_t p_tmp[ 16 ]; p_tmp[ 14 ] = p_md5->p_len[ 0 ]; p_tmp[ 15 ] = p_md5->p_len[ 1 ]; x = (p_md5->p_len[ 0 ] / 8) & 63; md5_add2( p_md5, p_drms_tab_tend, 56 - x ); memcpy( p_tmp, p_md5->p_data, 56 ); md5_transform( p_md5->p_digest, p_tmp ); memcpy( p_md5->p_digest_save, p_md5->p_digest, sizeof(uint32_t) * 4 ); } static void md5_add3( struct md5_s *p_md5, uint8_t *p_key, uint32_t i_len ) { uint32_t x, y; uint32_t i = 0; x = (p_md5->p_len[ 0 ] / 8) & 63; p_md5->p_len[ 0 ] += i_len * 8; if( p_md5->p_len[ 0 ] < i_len * 8 ) p_md5->p_len[ 1 ] += 1; p_md5->p_len[ 1 ] += i_len >> 29; y = 64 - x; if( i_len >= y ) { memcpy( ((uint8_t *)p_md5->p_data) + x, p_key, y ); md5_transform( p_md5->p_digest, p_md5->p_data ); i = y; y += 63; if( y < i_len ) { for( ; y < i_len; y += 64, i += 64 ) { md5_transform( p_md5->p_digest, (uint32_t *)&p_key[y - 63] ); } } else { x = 0; } } memcpy( ((uint8_t *)p_md5->p_data) + x, p_key + i, i_len - i ); } static int md5_osi( struct md5_s *p_md5 ) { 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") } }; md5_add1( p_md5, "cache-control", 13 ); md5_add1( p_md5, "Ethernet", 8 ); GetVolumeInformation( _T("C:\\"), NULL, 0, &i_serial, NULL, NULL, NULL, 0 ); md5_add1( p_md5, (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 ) { md5_add1( p_md5, (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 **pp_sci, uint32_t *p_sci_size ) { int i_ret = -1; #ifdef WIN32 HANDLE i_file; DWORD i_size, i_read; TCHAR p_path[ PATH_MAX ]; 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, NULL, 0, p_path ) ) ) { _tcsncat( p_path, p_filename, min( _tcslen( p_filename ), (PATH_MAX-1) - _tcslen( p_path ) ) ); i_file = CreateFile( p_path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL ); if( i_file != INVALID_HANDLE_VALUE ) { i_size = GetFileSize( i_file, NULL ); if( i_size != INVALID_FILE_SIZE && i_size > (sizeof(*pp_sci[ 0 ]) * 22) ) { *pp_sci = malloc( i_size * 2 ); if( *pp_sci != NULL ) { if( ReadFile( i_file, *pp_sci, i_size, &i_read, NULL ) && i_read == i_size ) { *p_sci_size = i_size; i_ret = 0; } else { free( (void *)*pp_sci ); *pp_sci = NULL; } } } CloseHandle( i_file ); } } if( shfolder_dll != NULL ) { FreeLibrary( shfolder_dll ); } #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 ) { struct md5_s md5; uint32_t i, x; for( i = 5; i < 25; i++ ) { if( p_acei[ i ] ) { acei_taxs( p_acei, p_acei[ i ] ); } } md5_init( &md5 ); md5_add2e( &md5, p_acei + 25, sizeof(*p_acei) * 4 ); md5_end2( &md5 ); x = i_len < 16 ? i_len : 16; if( x > 0 ) { for( i = 0; i < x; i++ ) { p_buffer[ i ] ^= ((uint8_t *)&md5.p_digest_save)[ i ]; } } } static uint32_t ttov_calc( uint32_t *p_acei ) { struct md5_s md5; int32_t i_val; md5_init( &md5 ); md5_add2e( &md5, p_acei + 0, 4 ); md5_add2e( &md5, p_acei + 4, 1 ); md5_end2( &md5 ); p_acei[ 4 ]++; i_val = ((int32_t)U32_AT(md5.p_digest_save)) % 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 ]; } } static int get_sys_key( uint32_t *p_sys_key ) { struct md5_s md5; uint32_t p_tmp_key[ 4 ]; md5_init( &md5 ); if( md5_osi( &md5 ) ) { return( -1 ); } md5_end1( &md5, p_tmp_key ); md5_init( &md5 ); md5_add2( &md5, "YuaFlafu", 8 ); md5_add2( &md5, (uint8_t *)p_tmp_key, 6 ); md5_add2( &md5, (uint8_t *)p_tmp_key, 6 ); md5_add2( &md5, (uint8_t *)p_tmp_key, 6 ); md5_add2( &md5, "zPif98ga", 8 ); md5_end2( &md5 ); memcpy( p_sys_key, md5.p_digest, sizeof(*p_sys_key) * 4 ); return( 0 ); } struct drms_s { uint32_t i_user; uint32_t i_key; uint8_t *p_iviv; 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 ]; char *psz_homedir; }; #define P_DRMS ((struct drms_s *)p_drms) static int rw_user_key( void *p_drms, uint32_t i_rw, uint32_t *p_user_key ) { FILE *file; int i_ret = -1; char sz_path[ PATH_MAX ]; #define DRMS_PI_DIRNAME "drms" #ifdef WIN32 #define DRMS_DIRNAME DRMS_PI_DIRNAME #else #define DRMS_DIRNAME "." DRMS_PI_DIRNAME #endif if( i_rw ) { snprintf( sz_path, (sizeof(sz_path)/sizeof(sz_path[ 0 ])) - 1, "%s/" DRMS_DIRNAME "/%08X.%03d", P_DRMS->psz_homedir, P_DRMS->i_user, P_DRMS->i_key ); file = fopen( sz_path, "r" ); if( file != NULL ) { i_ret = fread( p_user_key, sizeof(*p_user_key), 4, file ) == 4 ? 0 : -1; fclose( file ); } } else { snprintf( sz_path, (sizeof(sz_path)/sizeof(sz_path[ 0 ])) - 1, "%s/" DRMS_DIRNAME, P_DRMS->psz_homedir ); #if defined( HAVE_ERRNO_H ) # if defined( WIN32 ) if( !mkdir( sz_path ) || errno == EEXIST ) # else if( !mkdir( sz_path, 0755 ) || errno == EEXIST ) # endif #else if( !mkdir( sz_path ) ) #endif { snprintf( sz_path, (sizeof(sz_path)/sizeof(sz_path[ 0 ])) - 1, "%s/" DRMS_DIRNAME "/%08X.%03d", P_DRMS->psz_homedir, P_DRMS->i_user, P_DRMS->i_key ); file = fopen( sz_path, "w" ); if( file != NULL ) { i_ret = fwrite( p_user_key, sizeof(*p_user_key), 4, file ) == 4 ? 0 : -1; fclose( file ); } } } return( i_ret ); } static int get_user_key( void *p_drms, uint32_t *p_user_key ) { uint32_t i, y; uint32_t *p_tmp; uint32_t *p_cur_key; uint32_t p_acei[ 41 ]; uint32_t p_ctx[ 128 ]; uint32_t p_sys_key[ 4 ]; uint32_t i_sci_size; uint32_t *p_sci[ 2 ]; int i_ret = -1; uint32_t p_sci_key[ 4 ] = { 0x6E66556D, 0x6E676F70, 0x67666461, 0x33373866 }; if( !rw_user_key( p_drms, 1, p_user_key ) ) { return( 0 ); } if( get_sys_key( p_sys_key ) ) { return( -1 ); } if( get_sci_data( p_sci + 0, &i_sci_size ) ) { return( -1 ); } p_tmp = p_sci[ 0 ]; p_sci[ 1 ] = (uint32_t *)(((uint8_t *)p_sci[ 0 ]) + i_sci_size); i_sci_size -= sizeof(*p_sci[ 0 ]); init_ctx( p_ctx, p_sys_key ); for( i = 0, p_cur_key = p_sci_key; i < i_sci_size / sizeof(P_DRMS->p_key); i++ ) { y = i * sizeof(*p_sci[ 0 ]); ctx_xor( p_ctx, p_sci[ 0 ] + y + 1, p_sci[ 1 ] + y + 1, p_drms_tab3, p_drms_tab4 ); block_xor( p_sci[ 1 ] + y + 1, p_cur_key, p_sci[ 1 ] + y + 1 ); p_cur_key = p_sci[ 0 ] + y + 1; } acei_init( p_acei, p_sys_key ); for( i = 0; i < i_sci_size / sizeof(P_DRMS->p_key); i++ ) { y = i * sizeof(*p_sci[ 1 ]); acei( p_acei, (uint8_t *)(p_sci[ 1 ] + y + 1), sizeof(P_DRMS->p_key) ); } y = 0; i = U32_AT( &p_sci[ 1 ][ 5 ] ); i_sci_size -= 21 * sizeof(*p_sci[ 1 ]); p_sci[ 1 ] += 22; p_sci[ 0 ] = NULL; while( i_sci_size > 0 && i > 0 ) { if( p_sci[ 0 ] == NULL ) { i_sci_size -= 18 * sizeof(*p_sci[ 1 ]); if( i_sci_size <= 0 ) { break; } p_sci[ 0 ] = p_sci[ 1 ]; y = U32_AT( &p_sci[ 1 ][ 17 ] ); p_sci[ 1 ] += 18; } if( !y ) { i--; p_sci[ 0 ] = NULL; continue; } if( U32_AT( &p_sci[ 0 ][ 0 ] ) == P_DRMS->i_user && ( i_sci_size >= (sizeof(P_DRMS->p_key) + sizeof(p_sci[ 1 ][ 0 ]) ) ) && ( ( U32_AT( &p_sci[ 1 ][ 0 ] ) == P_DRMS->i_key ) || ( !P_DRMS->i_key ) || ( p_sci[ 1 ] == (p_sci[ 0 ] + 18) ) ) ) { memcpy( p_user_key, &p_sci[ 1 ][ 1 ], sizeof(P_DRMS->p_key) ); rw_user_key( p_drms, 0, p_user_key ); i_ret = 0; break; } y--; p_sci[ 1 ] += 5; i_sci_size -= 5 * sizeof(*p_sci[ 1 ]); } free( (void *)p_tmp ); return( i_ret ); } void *drms_alloc( char *psz_homedir ) { struct drms_s *p_drms; p_drms = malloc( sizeof(struct drms_s) ); if( p_drms == NULL ) { return 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; } p_drms->psz_homedir = malloc( PATH_MAX ); if( p_drms->psz_homedir != NULL ) { strncpy( p_drms->psz_homedir, psz_homedir, PATH_MAX ); p_drms->psz_homedir[ PATH_MAX - 1 ] = '\0'; } else { free( (void *)p_drms->p_tmp ); 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->psz_homedir != NULL ) { free( (void *)P_DRMS->psz_homedir ); } 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 FOURCC_user: { if( i_len < sizeof(P_DRMS->i_user) ) { i_ret = -1; break; } P_DRMS->i_user = U32_AT( p_info ); } break; case FOURCC_key: { if( i_len < sizeof(P_DRMS->i_key) ) { i_ret = -1; break; } P_DRMS->i_key = U32_AT( p_info ); } break; case FOURCC_iviv: { if( i_len < sizeof(P_DRMS->p_key) ) { i_ret = -1; break; } P_DRMS->p_iviv = malloc( sizeof(P_DRMS->p_key) ); if( P_DRMS->p_iviv == NULL ) { i_ret = -1; break; } memcpy( P_DRMS->p_iviv, p_info, sizeof(P_DRMS->p_key) ); } break; case FOURCC_name: { P_DRMS->i_name_len = strlen( p_info ); P_DRMS->p_name = malloc( P_DRMS->i_name_len ); if( P_DRMS->p_name == NULL ) { i_ret = -1; break; } memcpy( P_DRMS->p_name, p_info, P_DRMS->i_name_len ); } break; case FOURCC_priv: { struct md5_s md5; uint32_t i; uint32_t p_priv[ 64 ]; if( i_len < 64 ) { i_ret = -1; break; } md5_init( &md5 ); md5_add3( &md5, P_DRMS->p_name, P_DRMS->i_name_len ); md5_add3( &md5, P_DRMS->p_iviv, sizeof(P_DRMS->p_key) ); memcpy( p_priv, md5.p_len, sizeof(p_priv[ 0 ]) * 2 ); i = (md5.p_len[ 0 ] / 8) & 63; i = i >= 56 ? 120 - i : 56 - i; md5_add3( &md5, p_drms_tab_tend, i ); md5_add3( &md5, (uint8_t *)p_priv, sizeof(p_priv[ 0 ]) * 2 ); if( get_user_key( p_drms, P_DRMS->p_key ) ) { i_ret = -1; break; } init_ctx( P_DRMS->p_ctx, P_DRMS->p_key ); memcpy( p_priv, p_info, 64 ); memcpy( P_DRMS->p_key, md5.p_digest, 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->psz_homedir ); P_DRMS->psz_homedir = NULL; 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