mirror of
https://github.com/martravi/wiiqt.git
synced 2024-11-17 22:59:21 +01:00
629 lines
15 KiB
C++
629 lines
15 KiB
C++
#include "tiktmd.h"
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#include "tools.h"
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#include "aes.h"
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#include <iostream>
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Tmd::Tmd( const QByteArray &stuff )
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{
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data = stuff;
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p_tmd = NULL;
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if( data.isEmpty() || data.size() < 4 )//maybe 4 is still too low?
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return;
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SetPointer();
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if( (quint32)data.size() != SignedSize() )
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{
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data.resize( SignedSize() );
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SetPointer();
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}
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//hexdump( stuff );
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}
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quint64 Tmd::Tid()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->title_id );
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}
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bool Tmd::SetTid( quint64 tid )
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{
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if( !p_tmd )
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return false;
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p_tmd->title_id = qFromBigEndian( tid );
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return true;
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}
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quint64 Tmd::IOS()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->sys_version );
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}
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bool Tmd::SetIOS( quint64 ios )
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{
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if( !p_tmd )
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return false;
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p_tmd->sys_version = qFromBigEndian( ios );
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return true;
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}
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bool Tmd::SetAhb( bool remove )
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{
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if( !p_tmd )
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return false;
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quint32 access = qFromBigEndian( p_tmd->access_rights );
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if( remove )
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access |= 1;
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else
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access &= 0xfffffffe;
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p_tmd->access_rights = qToBigEndian( access );
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return true;
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}
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bool Tmd::SetDiskAccess( bool allow )
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{
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if( !p_tmd )
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return false;
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quint32 access = qFromBigEndian( p_tmd->access_rights );
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if( allow )
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access |= 2;
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else
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access &= 0xfffffffd;
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p_tmd->access_rights = qToBigEndian( access );
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return true;
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}
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quint32 Tmd::AccessFlags()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->access_rights );
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}
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quint16 Tmd::Gid()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->group_id );
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}
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QString Tmd::Cid( quint16 i )
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{
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if( !p_tmd || i > qFromBigEndian( p_tmd->num_contents ) )
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return QString();
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return QString( "%1" ).arg( qFromBigEndian( p_tmd->contents[ i ].cid ), 8, 16, QChar( '0' ) );
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}
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QByteArray Tmd::Hash( quint16 i )
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{
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if( !p_tmd || i > qFromBigEndian( p_tmd->num_contents ) )
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return QByteArray();
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return QByteArray( (const char*)&p_tmd->contents[ i ].hash, 20 );
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}
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bool Tmd::SetHash( quint16 cid, const QByteArray &hash )
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{
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if( !p_tmd || cid >= qFromBigEndian( p_tmd->num_contents ) || hash.size() != 20 )
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return false;
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const char* h = hash.data();
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for( quint8 i = 0; i < 20; i++ )
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p_tmd->contents[ cid ].hash[ i ] = h[ i ];
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return true;
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}
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quint16 Tmd::Count()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->num_contents );
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}
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quint16 Tmd::Version()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->title_version );
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}
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bool Tmd::SetVersion( quint16 v )
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{
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if( !p_tmd )
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return false;
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p_tmd->title_version = qFromBigEndian( v );
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return true;
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}
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quint64 Tmd::Size( quint16 i )
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{
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if( !p_tmd || i > qFromBigEndian( p_tmd->num_contents ) )
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return 0;
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return qFromBigEndian( p_tmd->contents[ i ].size );
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}
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bool Tmd::SetSize( quint16 cid, quint32 size )
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{
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if( !p_tmd || cid >= qFromBigEndian( p_tmd->num_contents ) )
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return false;
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p_tmd->contents[ cid ].size = qFromBigEndian( (quint64)size );
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return true;
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}
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quint16 Tmd::Index( quint16 i )
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{
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if( !p_tmd || i > qFromBigEndian( p_tmd->num_contents ) )
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return 0;
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return qFromBigEndian( p_tmd->contents[ i ].index );
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}
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quint16 Tmd::BootIndex()
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{
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if( !p_tmd )
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return 0;
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return qFromBigEndian( p_tmd->boot_index );
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}
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quint16 Tmd::Type( quint16 i )
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{
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if( !p_tmd || i > qFromBigEndian( p_tmd->num_contents ) )
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return 0;
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return qFromBigEndian( p_tmd->contents[ i ].type );
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}
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bool Tmd::SetType( quint16 cid, quint16 type )
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{
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if( !p_tmd || cid >= qFromBigEndian( p_tmd->num_contents ) )
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return false;
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p_tmd->contents[ cid ].type = qFromBigEndian( type );
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return true;
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}
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quint32 Tmd::SignedSize()
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{
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if( !p_tmd )
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return 0;
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return payLoadOffset + sizeof( tmd ) + ( sizeof( tmd_content ) * qFromBigEndian( p_tmd->num_contents ) );
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}
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void Tmd::SetPointer()
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{
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payLoadOffset = 0;
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if( data.startsWith( "\x0\x1\x0\x0" ) )
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payLoadOffset = sizeof( sig_rsa2048 );
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else if( data.startsWith( "\x0\x1\x0\x1" ) )
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payLoadOffset = sizeof( sig_rsa4096 );
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else if( data.startsWith( "\x0\x1\x0\x2" ) )
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payLoadOffset = sizeof( sig_ecdsa );
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p_tmd = (tmd*)((quint8*)data.data() + payLoadOffset);
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}
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void Tmd::Dbg()
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{
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if( !p_tmd )
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return;
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QString contents;
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quint16 cnt = Count();
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for( quint16 i = 0; i < cnt; i++ )
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{
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contents += QString( "%1 %2 %3 %4 " ).arg( i, 2, 16 ).arg( Type( i ), 4, 16 ).arg( Cid( i ) ).arg( Size( i ), 8, 16 )
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+ Hash( i ).toHex() + "\n";
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}
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QString s = QString( "TMD Dbg:\ntid:: %1\ncnt:: %2\n" )
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.arg( Tid(), 16, 16, QChar( '0' ) )
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.arg( cnt ) + contents;
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qDebug() << s;
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quint8 *p = (quint8*)data.data();
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qDebug() << "data" << p;
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qDebug() << "pointer" << p_tmd;
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qDebug() << "po" << payLoadOffset << SignedSize();
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}
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bool Tmd::FakeSign()
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{
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if( !p_tmd || payLoadOffset < 5 )
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return false;
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quint32 size = SignedSize();
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memset( (void*)( data.data() + 4 ), 0, payLoadOffset - 4 );//zero the RSA
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quint16 i = 0;
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bool ret = false;//brute force the sha1
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quint16 *fs = (quint16*)&p_tmd->reserved2;
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do
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{
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*fs = i;//no need to worry about endian here
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if( GetSha1( data.mid( payLoadOffset, size ) ).startsWith( '\0' ) )
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{
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ret = true;
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break;
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}
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}
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while( ++i );
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return ret;
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}
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Ticket::Ticket( const QByteArray &stuff, bool fixKeyIndex )
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{
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data = stuff;
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p_tik = NULL;
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if( data.isEmpty() || data.size() < 4 )//maybe 4 is still too low?
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return;
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SetPointer();
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quint8 iv[ 16 ];
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quint8 keyin[ 16 ];
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quint8 keyout[ 16 ];
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quint8 commonkey[ 16 ] = COMMON_KEY;
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quint8 *enc_key = (quint8 *)&p_tik->cipher_title_key;
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memcpy( keyin, enc_key, sizeof keyin );
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memset( keyout, 0, sizeof keyout );
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memset( iv, 0, sizeof iv);
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memcpy( iv, &p_tik->titleid, sizeof p_tik->titleid );
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aes_set_key( commonkey );
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aes_decrypt( iv, keyin, keyout, sizeof( keyin ) );
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decKey = QByteArray( (const char*)&keyout, 16 );
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if( (quint32)data.size() != SignedSize() )
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{
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data.resize( SignedSize() );
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SetPointer();
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}
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quint8 *keyindex = ((quint8*)p_tik) + 0xb1;
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if( fixKeyIndex && ( *keyindex > 0 ) )
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{
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if( *keyindex == 1 )//for now, just bail out for korean key
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{
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qWarning() << "Ticket::Ticket -> ticket uses the korean key. Only titles encrypted with the common key are supported";
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return;
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}
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qWarning() << "Ticket::Ticket -> key index is" << hex << *keyindex << ". Setting it to 0 and fakesigning";
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*keyindex = 0;//anything other than 0 or 1 is probably an error. fix it
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FakeSign();
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//hexdump( data );
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}
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}
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quint64 Ticket::Tid()
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{
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if( !p_tik )
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return 0;
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return qFromBigEndian( p_tik->titleid );
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}
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bool Ticket::SetTid( quint64 tid )
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{
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if( !p_tik )
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return false;
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p_tik->titleid = qFromBigEndian( tid );
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//create new title key
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quint8 iv[ 16 ];
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quint8 keyin[ 16 ];
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quint8 commonkey[ 16 ] = COMMON_KEY;
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memcpy( &keyin, (quint8 *)decKey.data(), 16 );
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memset( &p_tik->cipher_title_key, 0, 16 );
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memset( &iv, 0, 16 );
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memcpy( &iv, &p_tik->titleid, sizeof(quint64) );
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aes_set_key( (quint8 *)&commonkey );
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aes_encrypt( (quint8 *)&iv, (quint8 *)&keyin,
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(quint8 *)&p_tik->cipher_title_key, 16 );
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return true;
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}
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QByteArray Ticket::DecryptedKey()
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{
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return decKey;
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}
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quint32 Ticket::SignedSize()
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{
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return payLoadOffset + sizeof( tik );
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}
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void Ticket::SetPointer()
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{
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payLoadOffset = 0;
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if( data.startsWith( "\x0\x1\x0\x0" ) )
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payLoadOffset = sizeof( sig_rsa2048 );
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else if( data.startsWith( "\x0\x1\x0\x1" ) )
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payLoadOffset = sizeof( sig_rsa4096 );
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else if( data.startsWith( "\x0\x1\x0\x2" ) )
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payLoadOffset = sizeof( sig_ecdsa );
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p_tik = (tik*)((quint8*)(data.data()) + payLoadOffset);
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}
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bool Ticket::FakeSign()
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{
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if( !p_tik || payLoadOffset < 5 )
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return false;
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quint32 size = SignedSize();
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memset( (void*)( data.data() + 4 ), 0, payLoadOffset - 4 );//zero the RSA
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quint16 i = 0;
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bool ret = false;//brute force the sha1
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do
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{
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p_tik->padding = i;//no need to worry about endian here
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if( GetSha1( data.mid( payLoadOffset, size ) ).startsWith( '\0' ) )
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{
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ret = true;
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break;
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}
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}
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while( ++i );
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return ret;
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}
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//theres probably a better place to put all this stuff. but until then, just put it here
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//and this BE() probably isnt too good for cross-platformyitutiveness
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#define BE32(a) (((a)[0] << 24)|((a)[1] << 16)|((a)[2] << 8)|(a)[3])
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#define bn_zero(a,b) memset(a,0,b)
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#define bn_copy(a,b,c) memcpy(a,b,c)
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#define bn_compare(a,b,c) memcmp(a,b,c)
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// calc a = a mod N, given n = size of a,N in bytes
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static void bn_sub_modulus( quint8 *a, const quint8 *N, const quint32 n )
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{
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quint32 dig;
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quint8 c = 0;
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for( quint32 i = n - 1; i < n; i-- )
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{
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dig = N[ i ] + c;
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c = ( a [ i ] < dig );
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a[ i ] -= dig;
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}
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}
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// calc d = (a + b) mod N, given n = size of d,a,b,N in bytes
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static void bn_add( quint8 *d, const quint8 *a, const quint8 *b, const quint8 *N, const quint32 n )
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{
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quint32 i;
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quint32 dig;
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quint8 c = 0;
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for( i = n - 1; i < n; i--)
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{
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dig = a[ i ] + b[ i ] + c;
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c = ( dig >= 0x100 );
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d[ i ] = dig;
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}
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if( c )
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bn_sub_modulus( d, N, n );
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if( bn_compare( d, N, n ) >= 0 )
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bn_sub_modulus( d, N, n );
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}
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// calc d = (a * b) mod N, given n = size of d,a,b,N in bytes
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static void bn_mul( quint8 *d, const quint8 *a, const quint8 *b, const quint8 *N, const quint32 n )
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{
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quint8 mask;
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bn_zero( d, n );
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for( quint32 i = 0; i < n; i++ )
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for( mask = 0x80; mask != 0; mask >>= 1 )
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{
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bn_add( d, d, d, N, n );
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if( ( a[ i ] & mask ) != 0 )
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bn_add( d, d, b, N, n );
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}
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}
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// calc d = (a ^ e) mod N, given n = size of d,a,N and en = size of e in bytes
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static void bn_exp( quint8 *d, const quint8 *a, const quint8 *N, const quint32 n, const quint8 *e, const quint32 en )
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{
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quint8 t[ 512 ];
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quint8 mask;
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bn_zero( d, n );
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d[ n-1 ] = 1;
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for( quint32 i = 0; i < en; i++ )
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for( mask = 0x80; mask != 0; mask >>= 1 )
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{
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bn_mul( t, d, d, N, n );
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if( ( e [ i ] & mask ) != 0 )
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bn_mul( d, t, a, N, n );
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else
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bn_copy( d, t, n );
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}
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}
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static int get_sig_len( const quint8 *sig )
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{
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quint32 type;
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type = BE32( sig );
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switch( type - 0x10000 )
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{
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case 0:
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return 0x240;
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case 1:
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return 0x140;
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case 2:
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return 0x80;
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}
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return -ERROR_SIG_TYPE;
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}
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static int get_sub_len( const quint8 *sub )
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{
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quint32 type;
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type = BE32( sub + 0x40 );
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switch( type )
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{
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case 0: return 0x2c0;
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case 1: return 0x1c0;
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case 2: return 0x100;
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}
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return -ERROR_SUB_TYPE;
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}
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static int check_rsa( const QByteArray &h, const quint8 *sig, const quint8 *key, const quint32 n )
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{
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quint8 correct[ 0x200 ], x[ 0x200 ];
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static const quint8 ber[ 16 ] = { 0x00,0x30,0x21,0x30,0x09,0x06,0x05,0x2b,
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0x0e,0x03,0x02,0x1a,0x05,0x00,0x04,0x14 };
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correct[ 0 ] = 0;
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correct[ 1 ] = 1;
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memset( correct + 2, 0xff, n - 38 );
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memcpy( correct + n - 36, ber, 16 );
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memcpy( correct + n - 20, h.constData(), 20 );
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bn_exp( x, sig, key, n, key + n, 4 );
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//qDebug() << "Decrypted signature hash:" << QByteArray( (const char*)&x[ n-20 ], 20 ).toHex();
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//qDebug() << " SHA1 hash:" << h.toHex();
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if( memcmp( correct, x, n ) == 0 )
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return 0;
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if( strncmp( (char*)h.constData(), (char*) x + n - 20, 20 ) == 0 )
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return ERROR_RSA_FAKESIGNED;
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qDebug() << "Decrypted signature hash:" << qPrintable( QString( QByteArray( (const char*)&x[ n-20 ], 20 ).toHex() ) );
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qDebug() << " SHA1 hash:" << qPrintable( QString( h.toHex() ) );
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return ERROR_RSA_HASH;
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}
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static int check_hash( const QByteArray &h, const quint8 *sig, const quint8 *key )
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{
|
|
quint32 type;
|
|
type = BE32( sig ) - 0x10000;
|
|
if( (qint32)type != BE32( key + 0x40 ) )
|
|
return ERROR_RSA_TYPE_MISMATCH;
|
|
|
|
if( type == 1 )
|
|
return check_rsa( h, sig + 4, key + 0x88, 0x100 );
|
|
return ERROR_RSA_TYPE_UNKNOWN;
|
|
}
|
|
|
|
static const quint8* find_cert_in_chain( const quint8 *sub, const quint8 *cert, const quint32 cert_len, int *err )
|
|
{
|
|
char parent[ 64 ], *child;
|
|
int sig_len, sub_len;
|
|
const quint8 *p, *issuer;
|
|
|
|
strncpy( parent, (char*)sub, sizeof parent );
|
|
parent[ sizeof parent - 1 ] = 0;
|
|
child = strrchr( parent, '-' );
|
|
if( child )
|
|
*child++ = 0;
|
|
else
|
|
{
|
|
*parent = 0;
|
|
child = (char*)sub;
|
|
}
|
|
|
|
*err = -ERROR_CERT_NOT_FOUND;
|
|
|
|
for( p = cert; p < cert + cert_len; p += sig_len + sub_len )
|
|
{
|
|
sig_len = get_sig_len( p );
|
|
if( sig_len < 0 )
|
|
{
|
|
*err = sig_len;
|
|
break;
|
|
}
|
|
issuer = p + sig_len;
|
|
sub_len = get_sub_len( issuer );
|
|
if( sub_len < 0 )
|
|
{
|
|
*err = sub_len;
|
|
break;
|
|
}
|
|
if( strcmp( parent, (char*)issuer ) == 0 && strcmp( child, (char*)issuer + 0x44 ) == 0 )
|
|
return p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int check_cert_chain( const QByteArray &data )
|
|
{
|
|
int cert_err;
|
|
const quint8* key;
|
|
const quint8 *sig, *sub, *key_cert;
|
|
int sig_len, sub_len;
|
|
QByteArray h;
|
|
int ret;
|
|
const quint8 *certificates = certs_dat;
|
|
|
|
sig = (const quint8*)data.constData();
|
|
sig_len = get_sig_len( sig );
|
|
if( sig_len < 0 )
|
|
return -sig_len;
|
|
|
|
sub = (const quint8*)( data.data() + sig_len );
|
|
sub_len = data.size() - sig_len;
|
|
if( sub_len <= 0 )
|
|
return ERROR_SUB_TYPE;
|
|
|
|
for( ; ; )
|
|
{
|
|
//qDebug() << "Verifying using" << QString( (const char*) sub );
|
|
if( strcmp((char*)sub, "Root" ) == 0 )
|
|
{
|
|
key = root_dat;
|
|
h = GetSha1( QByteArray( (const char*)sub, sub_len ) );
|
|
if( BE32( sig ) != 0x10000 )
|
|
return ERROR_SIG_TYPE;
|
|
return check_rsa( h, sig + 4, key, 0x200 );
|
|
}
|
|
|
|
key_cert = find_cert_in_chain( sub, certificates, CERTS_DAT_SIZE, &cert_err );
|
|
if( key_cert )
|
|
cert_err = get_sig_len( key_cert );
|
|
|
|
if( cert_err < 0 )
|
|
return -cert_err;
|
|
key = key_cert + cert_err;
|
|
|
|
h = GetSha1( QByteArray( (const char*)sub, sub_len ) );
|
|
ret = check_hash( h, sig, key );
|
|
// remove this if statement if you don't want to check the whole chain
|
|
if( ret != ERROR_SUCCESS )
|
|
return ret;
|
|
sig = key_cert;
|
|
sig_len = get_sig_len( sig );
|
|
if( sig_len < 0 )
|
|
return -sig_len;
|
|
sub = sig + sig_len;
|
|
sub_len = get_sub_len( sub );
|
|
if( sub_len < 0 )
|
|
return -sub_len;
|
|
}
|
|
}
|