/***************************************************************************** * 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" #define TAOS_INIT( tmp, digest ) \ memset( tmp, 0, sizeof(tmp) ); \ tmp[ digest + 0 ] = 0x67452301; \ tmp[ digest + 1 ] = 0xEFCDAB89; \ tmp[ digest + 2 ] = 0x98BADCFE; \ tmp[ digest + 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, 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 } static void taos( uint32_t *p_digest, uint32_t *p_input ) { uint32_t i, a, b, c, d; uint32_t x = 0; uint32_t p_tmp2[ 4 ]; a = p_digest[0]; b = p_digest[1]; c = p_digest[2]; d = p_digest[3]; p_tmp2[ 0 ] = ((~b & d) | (c & b)) + p_input[ x ]; a = p_tmp2[ 0 ] + a + p_drms_tab_taos[ x++ ]; for( i = 0; i < 4; i++ ) { p_tmp2[ 0 ] = ((a >> 0x19) | (a << 0x7)) + b; p_tmp2[ 1 ] = ((~p_tmp2[ 0 ] & c) | (b & p_tmp2[ 0 ])) + p_input[ x ]; p_tmp2[ 1 ] += d + p_drms_tab_taos[ x++ ]; d = ((p_tmp2[ 1 ] >> 0x14) | (p_tmp2[ 1 ] << 0xC)) + p_tmp2[ 0 ]; p_tmp2[ 1 ] = ((~d & b) | (d & p_tmp2[ 0 ])) + p_input[ x ]; p_tmp2[ 1 ] += c + p_drms_tab_taos[ x++ ]; c = ((p_tmp2[ 1 ] >> 0xF) | (p_tmp2[ 1 ] << 0x11)) + d; p_tmp2[ 1 ] = ((~c & p_tmp2[ 0 ]) | (d & c)) + p_input[ x ]; p_tmp2[ 2 ] = p_tmp2[ 1 ] + b + p_drms_tab_taos[ x++ ]; b = ((p_tmp2[ 2 ] << 0x16) | (p_tmp2[ 2 ] >> 0xA)) + c; if( i == 3 ) { p_tmp2[ 1 ] = ((~d & c) | (d & b)) + p_input[ 1 ]; } else { p_tmp2[ 1 ] = ((~b & d) | (c & b)) + p_input[ x ]; } a = 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 ] = ((a >> 0x1B) | (a << 0x5)) + b; p_tmp2[ 1 ] = ((~c & b) | (c & p_tmp2[ 0 ])) + p_input[ p_table[ i ][ 0 ] ]; p_tmp2[ 1 ] += d + p_drms_tab_taos[ x++ ]; d = ((p_tmp2[ 1 ] >> 0x17) | (p_tmp2[ 1 ] << 0x9)) + p_tmp2[ 0 ]; p_tmp2[ 1 ] = ((~b & p_tmp2[ 0 ]) | (d & b)) + p_input[ p_table[ i ][ 1 ] ]; p_tmp2[ 1 ] += c + p_drms_tab_taos[ x++ ]; c = ((p_tmp2[ 1 ] >> 0x12) | (p_tmp2[ 1 ] << 0xE)) + d; p_tmp2[ 1 ] = ((~p_tmp2[ 0 ] & d) | (c & p_tmp2[ 0 ])) + p_input[ p_table[ i ][ 2 ] ]; p_tmp2[ 1 ] += b + p_drms_tab_taos[ x++ ]; b = ((p_tmp2[ 1 ] << 0x14) | (p_tmp2[ 1 ] >> 0xC)) + c; if( i == 3 ) { p_tmp2[ 1 ] = (d ^ c ^ b) + p_input[ p_table[ i ][ 3 ] ]; } else { p_tmp2[ 1 ] = ((~d & c) | (d & b)) + p_input[ p_table[ i ][ 3 ] ]; } a = 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 ] = ((a >> 0x1C) | (a << 0x4)) + b; p_tmp2[ 1 ] = (c ^ b ^ p_tmp2[ 0 ]) + p_input[ p_table[ i ][ 0 ] ]; p_tmp2[ 1 ] += d + p_drms_tab_taos[ x++ ]; d = ((p_tmp2[ 1 ] >> 0x15) | (p_tmp2[ 1 ] << 0xB)) + p_tmp2[ 0 ]; p_tmp2[ 1 ] = (d ^ b ^ p_tmp2[ 0 ]) + p_input[ p_table[ i ][ 1 ] ]; p_tmp2[ 1 ] += c + p_drms_tab_taos[ x++ ]; c = ((p_tmp2[ 1 ] >> 0x10) | (p_tmp2[ 1 ] << 0x10)) + d; p_tmp2[ 1 ] = (d ^ c ^ p_tmp2[ 0 ]) + p_input[ p_table[ i ][ 2 ] ]; p_tmp2[ 1 ] += b + p_drms_tab_taos[ x++ ]; b = ((p_tmp2[ 1 ] << 0x17) | (p_tmp2[ 1 ] >> 0x9)) + c; if( i == 3 ) { p_tmp2[ 1 ] = ((~d | b) ^ c) + p_input[ p_table[ i ][ 3 ] ]; } else { p_tmp2[ 1 ] = (d ^ c ^ b) + p_input[ p_table[ i ][ 3 ] ]; } a = 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 ] = ((a >> 0x1A) | (a << 0x6)) + b; p_tmp2[ 1 ] = ((~c | p_tmp2[ 0 ]) ^ b) + p_input[ p_table[ i ][ 0 ] ]; p_tmp2[ 1 ] += d + p_drms_tab_taos[ x++ ]; d = ((p_tmp2[ 1 ] >> 0x16) | (p_tmp2[ 1 ] << 0xA)) + p_tmp2[ 0 ]; p_tmp2[ 1 ] = ((~b | d) ^ p_tmp2[ 0 ]) + p_input[ p_table[ i ][ 1 ] ]; p_tmp2[ 1 ] += c + p_drms_tab_taos[ x++ ]; c = ((p_tmp2[ 1 ] >> 0x11) | (p_tmp2[ 1 ] << 0xF)) + d; p_tmp2[ 1 ] = ((~p_tmp2[ 0 ] | c) ^ d) + p_input[ p_table[ i ][ 2 ] ]; p_tmp2[ 1 ] += b + p_drms_tab_taos[ x++ ]; b = ((p_tmp2[ 1 ] << 0x15) | (p_tmp2[ 1 ] >> 0xB)) + c; if( i < 3 ) { p_tmp2[ 1 ] = ((~d | b) ^ c) + p_input[ p_table[ i ][ 3 ] ]; a = p_tmp2[ 0 ] + p_tmp2[ 1 ] + p_drms_tab_taos[ x++ ]; } } a = p_tmp2[ 0 ]; p_digest[ 0 ] += a; p_digest[ 1 ] += b; p_digest[ 2 ] += c; p_digest[ 3 ] += d; } 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 **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 ) { 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 ]; } } static int 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 ); } 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 ) { 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: { 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, sizeof(P_DRMS->p_key) ); 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 ); 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, 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->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