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wiiqt6/WiiQt/blocks0to7.cpp
martravi 0da56e8f75 NUS NAND Builder and base ported to QT 6
2024-07-19 16:36:53 +02:00

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#include "blocks0to7.h"
#include "tools.h"
#include "tiktmd.h"
Blocks0to7::Blocks0to7( const QList<QByteArray> &blocks )
{
_ok = false;
if( !blocks.isEmpty() )
SetBlocks( blocks );
}
bool Blocks0to7::SetBlocks( const QList<QByteArray> &blocks )
{
//qDebug() << "Blocks0to7::SetBlocks" << blocks.size();
_ok = false;
this->blocks.clear();
boot2Infos.clear();
quint16 cnt = blocks.size();
if( cnt != 8 )
return false;
for( quint16 i = 0; i < cnt; i++ )
{
if( blocks.at( i ).size() != 0x20000 )
{
qWarning() << "Blocks0to7::SetBlocks -> block" << i << "is" << Qt::hex << blocks.at( i ).size() << "bytes";
return false;
}
}
this->blocks = blocks;
_ok = true;
return true;
}
quint8 Blocks0to7::Boot1Version()
{
if( blocks.size() != 8 )
{
qWarning() << "Blocks0to7::Boot1Version -> not enough blocks" << blocks.size();
return BOOT_1_UNK;
}
QByteArray hash = GetSha1( blocks.at( 0 ) );
if( hash == QByteArray( "\x4a\x7c\x6f\x30\x38\xde\xea\x7a\x07\xd3\x32\x32\x02\x4b\xe9\x5a\xfb\x56\xbf\x65" ) )
return BOOT_1_A;
if( hash == QByteArray( "\x2c\xdd\x5a\xff\xd2\xe7\x8c\x53\x76\x16\xa1\x19\xa7\xa2\xe1\xc5\x68\xe9\x1f\x22" ) )
return BOOT_1_B;
if( hash == QByteArray( "\xf0\x1e\x8a\xca\x02\x9e\xe0\xcb\x52\x87\xf5\x05\x5d\xa1\xa0\xbe\xd2\xa5\x33\xfa" ) )
return BOOT_1_C;
if( hash == QByteArray( "\x8d\x9e\xcf\x2f\x8f\x98\xa3\xc1\x07\xf1\xe5\xe3\x6f\xf2\x4d\x57\x7e\xac\x36\x08" ) )
return BOOT_1_D; //displayed as "boot1?" in ceilingcat
qWarning() << "Blocks0to7::Boot1Version -> unknown boot1 hash:" << hash.toHex();
return BOOT_1_UNK;
}
//really ugly thing to get the different versions of boot2.
//this doesnt take into account the possibility that boot2 is bigger and takes up more than 2 blocks
//there are 0x40 blocks in the blockmap, but only 8 are used. maybe IOS has the authority to hijack the others if
//it runs out of room here. if that ever happns, this code will become quite wrong
const QList<Boot2Info> &Blocks0to7::Boot2Infos()
{
if( !boot2Infos.isEmpty() )
{
//qDebug() << "Blocks0to7::Boot2Infos() returning data from last time";
return boot2Infos;
}
//QList< Boot2Info > ret;
quint16 cnt = blocks.size();
if( cnt != 8 )
return boot2Infos;
//get all the blockmaps
quint16 newest = 0;
quint8 lbm[ 8 ];
for( quint8 i = 1; i < 8; i++ )
{
Boot2Info info = GetBlockMap( blocks.at( i ) );
if( info.state == BOOT_2_ERROR )//this block doesnt contain a decent blockmap
continue;
info.secondBlock = i; //this one is easy enough
//find the first block that belongs to this second one
if( i > 4 )//blocks are backwards
{
bool found = false;
for( quint8 j = 7; j > i; j++ )
{
if( info.blockMap[ j ] )//marked bad
continue;
if( ( ( j > i + 1 ) && !info.blockMap[ i + 1 ] )//probably a much cleaner way to write this
|| ( j == 6 && !info.blockMap[ 7 ] ) ) //but basically check for a couple stupid shit in the layout that really shouldnt ever happen
break;
info.firstBlock = j;
found = true;
break;
}
if( !found )
continue;
}
else//blocks are forwards
{
bool found = false;
for( quint8 j = 0; j < i; j++ )
{
if( info.blockMap[ j ] )//marked bad
continue;
info.firstBlock = j;
found = true;
break;
}
if( !found )
continue;
found = false;
//probably a much cleaner way to write this
//but basically check for a couple stupid shit in the layout that really shouldnt ever happen
for( quint8 j = info.firstBlock + 1; j < info.secondBlock && !found; j++ )
{
if( info.blockMap[ j ] )//marked bad
continue;
found = true;
}
if( found )//this means there is some other good block between the first block and this one that has the block map
continue;
}
//we made it this far, it means that so far we have a correct looking blockmap that points to this copy of boot2
if( info.generation > newest )
{
newest = info.generation;
for( quint8 j = 0; j < 8; j++ )
lbm[ j ] = info.blockMap[ j ];
}
boot2Infos << info;
}
//qDebug() << "newest blockmap" << QByteArray( (const char*)&lbm, 8 ).toHex();
cnt = boot2Infos.size();
bool foundBoot = false;
bool foundBackup = false;
for( quint8 i = 0; i < cnt; i++ )
{
boot2Infos[ i ] = CheckHashes( boot2Infos[ i ] );//check all the hashes and stuff
if( !foundBoot && !lbm[ boot2Infos.at( i ).firstBlock ] && !lbm[ boot2Infos.at( i ).secondBlock ] )
{
//qDebug() << "copy" << i << "is used when booting";
boot2Infos[ i ].state |= BOOT_2_USED_TO_BOOT;
foundBoot = true;
}
else if( lbm[ boot2Infos.at( i ).firstBlock ] || lbm[ boot2Infos.at( i ).secondBlock ] )
{
boot2Infos[ i ].state |= BOOT_2_MARKED_BAD;
}
}
for( quint8 i = boot2Infos.size(); !foundBackup && i > 0; i-- )
{
if( !lbm[ boot2Infos.at( i - 1 ).firstBlock ]
&& !lbm[ boot2Infos.at( i - 1 ).secondBlock ]
&& boot2Infos.at( i - 1 ).firstBlock > boot2Infos.at( i - 1 ).secondBlock )
{
//qDebug() << "copy" << i << "is used when booting from backup";
boot2Infos[ i - 1 ].state |= BOOT_2_BACKUP_COPY;
foundBackup = true;
if( !foundBoot )
boot2Infos[ i - 1 ].state |= BOOT_2_USED_TO_BOOT;
}
}
return boot2Infos;
}
Boot2Info Blocks0to7::GetBlockMap( const QByteArray &block )
{
Boot2Info ret;
ret.state = BOOT_2_ERROR;
if( block.size() != 0x20000 )
return ret;
QByteArray first = block.mid( 0x1f800, 0x4c );
QByteArray second = block.mid( 0x1f84c, 0x4c );
QByteArray third = block.mid( 0x1f898, 0x4c );
QByteArray goodOne = QByteArray( "\x26\xF2\x9A\x40\x1E\xE6\x84\xCF" );
if( first.startsWith( goodOne ) && ( first == second || first == third ) )
goodOne = first;
else if( second.startsWith( goodOne ) && ( second == third ) )
goodOne = second;
else
return ret;
ret.generation = goodOne.mid( 8, 4 ).toHex().toInt( NULL, 16 );
for( quint8 i = 0; i < 8; i++ )
ret.blockMap[ i ] = goodOne.at( i + 12 );
ret.state = BOOT_2_TIK_SIG_OK; //just assign this for now. it will be corrected before this data leaves the class
return ret;
}
Boot2Info Blocks0to7::CheckHashes( const Boot2Info &info )
{
Boot2Info ret = info;
ret.state = BOOT_2_ERROR_PARSING;
QByteArray stuff = blocks.at( ret.firstBlock );
QBuffer b( &stuff );
b.open( QIODevice::ReadOnly );
quint32 headerSize;
quint32 dataOff;
quint32 certSize;
quint32 ticketSize;
quint32 tmdSize;
quint32 tmp;
b.read( (char*)&tmp, 4 );
headerSize = qFromBigEndian( tmp );
if( headerSize != 0x20 )
return ret;
b.read( (char*)&tmp, 4 );
dataOff = qFromBigEndian( tmp );
b.read( (char*)&tmp, 4 );
certSize = qFromBigEndian( tmp );
b.read( (char*)&tmp, 4 );
ticketSize = qFromBigEndian( tmp );
b.read( (char*)&tmp, 4 );
tmdSize = qFromBigEndian( tmp );
b.close();
QByteArray tikD = stuff.mid( headerSize + certSize, ticketSize );
QByteArray tmdD = stuff.mid( headerSize + certSize + ticketSize, tmdSize );
Tmd t( tmdD );
Ticket ticket( tikD );
if( t.Tid() != 0x100000001ull || ticket.Tid() != 0x100000001ull )
{
qWarning() << "Blocks0to7::CheckHashes -> bad TID";
return ret;
}
ret.state = 0;
int res = check_cert_chain( tikD );
switch( res )
{
default:
case ERROR_SIG_TYPE:
case ERROR_SUB_TYPE:
case ERROR_RSA_TYPE_UNKNOWN:
case ERROR_CERT_NOT_FOUND:
ret.state = BOOT_2_ERROR;
qWarning() << "check_cert_chain( tikD ):" << res;
return ret;
break;
case ERROR_RSA_TYPE_MISMATCH:
case ERROR_RSA_HASH:
ret.state = BOOT_2_BAD_SIGNATURE;
//qWarning() << "check_cert_chain( tikD ):" << res;
return ret;
break;
case ERROR_RSA_FAKESIGNED:
ret.state |= BOOT_2_TIK_FAKESIGNED;
break;
case ERROR_SUCCESS:
ret.state |= BOOT_2_TIK_SIG_OK;
break;
}
res = check_cert_chain( tmdD );
switch( res )
{
default:
case ERROR_SIG_TYPE:
case ERROR_SUB_TYPE:
case ERROR_RSA_TYPE_UNKNOWN:
case ERROR_CERT_NOT_FOUND:
ret.state = BOOT_2_ERROR;
//qWarning() << "check_cert_chain( tikD ):" << res;
return ret;
break;
case ERROR_RSA_TYPE_MISMATCH:
case ERROR_RSA_HASH:
ret.state = BOOT_2_BAD_SIGNATURE;
//qWarning() << "check_cert_chain( tikD ):" << res;
return ret;
break;
case ERROR_RSA_FAKESIGNED:
{
ret.state |= BOOT_2_TMD_FAKESIGNED;
if( tmdD.contains( "BM1.1" ) )
ret.version = BOOTMII_11;
else if( tmdD.contains( "BM1.3" ) )
ret.version = BOOTMII_13;
else
ret.version = BOOTMII_UNK;
}
break;
case ERROR_SUCCESS:
{
ret.state |= BOOT_2_TMD_SIG_OK;
ret.version = t.Version();
}
break;
}
//now decrypt boot2 and check the hash ( only checking 1 content because thats all there is )
stuff += blocks.at( ret.secondBlock );
AesSetKey( ticket.DecryptedKey() );
QByteArray decD = AesDecrypt( 0, stuff.mid( dataOff, RU( t.Size( 0 ), 0x40 ) ) );
decD.resize( t.Size( 0 ) );
QByteArray realHash = GetSha1( decD );
if( realHash != t.Hash( 0 ) )
ret.state |= BOOT_2_BAD_CONTENT_HASH;
return ret;
}
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