private void DeriveKeyblobKeys()
{
if (SecureBootKey.IsEmpty() || TsecKey.IsEmpty())
{
return;
}
bool haveKeyblobMacKeySource = !MasterKeySource.IsEmpty();
var temp = new byte[0x10];
for (int i = 0; i < UsedKeyblobCount; i++)
{
if (KeyblobKeySources[i].IsEmpty())
{
continue;
}
Crypto.DecryptEcb(TsecKey, KeyblobKeySources[i], temp, 0x10);
Crypto.DecryptEcb(SecureBootKey, temp, KeyblobKeys[i], 0x10);
if (!haveKeyblobMacKeySource)
{
continue;
}
Crypto.DecryptEcb(KeyblobKeys[i], KeyblobMacKeySource, KeyblobMacKeys[i], 0x10);
}
}
private void ReadKeyblobs()
{
var masterKek = new byte[0x10];
bool haveMasterKeySource = !MasterKeySource.IsEmpty();
for (int i = 0; i < 0x20; i++)
{
if (Keyblobs[i].IsEmpty())
{
continue;
}
Array.Copy(Keyblobs[i], 0x80, Package1Keys[i], 0, 0x10);
if (!haveMasterKeySource)
{
continue;
}
Array.Copy(Keyblobs[i], masterKek, 0x10);
Crypto.DecryptEcb(masterKek, MasterKeySource, MasterKeys[i], 0x10);
}
}
private void DeriveMasterKeys()
{
if (MasterKeySource.IsEmpty())
{
return;
}
for (int i = 0; i < 0x20; i++)
{
if (MasterKeks[i].IsEmpty())
{
continue;
}
Crypto.DecryptEcb(MasterKeks[i], MasterKeySource, MasterKeys[i], 0x10);
}
}
