private bool CryptHeaderCik(bool encrypt)
{
if ((!encrypt && CikIsDecrypted) || IsXvcFile)
{
CikIsDecrypted = true;
return(true);
}
if (!OdkKeyLoaded)
{
return(false);
}
var cipher = new AesCipher(OdkKey);
if (encrypt)
{
cipher.EncryptBlock(Header.EncryptedCIK, 0, 0x10, Header.EncryptedCIK, 0);
cipher.EncryptBlock(Header.EncryptedCIK, 0x10, 0x10, Header.EncryptedCIK, 0x10);
}
else
{
cipher.DecryptBlock(Header.EncryptedCIK, 0, 0x10, Header.EncryptedCIK, 0);
cipher.DecryptBlock(Header.EncryptedCIK, 0x10, 0x10, Header.EncryptedCIK, 0x10);
}
CikIsDecrypted = !encrypt;
return(true);
}
public static byte[] CryptData(bool encrypt, byte[] data, byte[] key, byte[] startIv)
{
var cipher = new AesCipher(key);
int blocks = data.Length / 0x10;
var newData = new byte[data.Length];
var iv = new byte[startIv.Length];
Array.Copy(startIv, iv, startIv.Length);
for (int i = 0; i < blocks; i++)
{
byte[] crypted = CryptBlock(encrypt, data, i * 0x10, 0x10, iv, cipher);
iv = MorphIv(iv);
Array.Copy(crypted, 0, newData, i * 0x10, 0x10);
}
return(newData);
}
private bool CryptSection(bool encrypt, byte[] key, uint headerId, ulong offset, ulong length)
{
var ivKey = new byte[0x10];
var dataKey = new byte[0x10];
Array.Copy(key, ivKey, 0x10);
Array.Copy(key, 0x10, dataKey, 0, 0x10);
var counterToEncrypt = new byte[0x10];
Array.Copy(Header.VDUID, 0, counterToEncrypt, 0x8, 0x8);
byte[] test = BitConverter.GetBytes(headerId);
Array.Copy(test, 0, counterToEncrypt, 0x4, 0x4);
int numBlocks = (int)(length + 0xFFF) / 0x1000;
var ivCipher = new AesCipher(ivKey);
_io.Stream.Position = (long)offset;
for (int i = 0; i < numBlocks; i++)
{
var counter = new byte[0x10];
Array.Copy(counterToEncrypt, counter, 0x10);
var blockIdBytes = BitConverter.GetBytes(i);
Array.Copy(blockIdBytes, counter, 4);
var counterEnc = new byte[0x10];
ivCipher.EncryptBlock(counter, 0, 0x10, counterEnc, 0);
byte[] origData = _io.Reader.ReadBytes(0x1000);
byte[] newData = Shared.CryptData(encrypt, origData, dataKey, counterEnc);
_io.Stream.Position = _io.Stream.Position - 0x1000;
_io.Writer.Write(newData);
}
return(true);
}
private bool CryptSection(bool encrypt, byte[] key, uint headerId, ulong offset, ulong length)
{
var ivKey = new byte[0x10];
var dataKey = new byte[0x10];
Array.Copy(key, ivKey, 0x10);
Array.Copy(key, 0x10, dataKey, 0, 0x10);
var counterToEncrypt = new byte[0x10];
Array.Copy(Header.VDUID, 0, counterToEncrypt, 0x8, 0x8);
byte[] test = BitConverter.GetBytes(headerId);
Array.Copy(test, 0, counterToEncrypt, 0x4, 0x4);
int numBlocks = (int)(length + 0xFFF) / 0x1000;
var ivCipher = new AesCipher(ivKey);
_io.Stream.Position = (long)offset;
for (int i = 0; i < numBlocks; i++)
{
var counter = new byte[0x10];
Array.Copy(counterToEncrypt, counter, 0x10);
var blockIdBytes = BitConverter.GetBytes(i);
Array.Copy(blockIdBytes, counter, 4);
var counterEnc = new byte[0x10];
ivCipher.EncryptBlock(counter, 0, 0x10, counterEnc, 0);
byte[] origData = _io.Reader.ReadBytes(0x1000);
byte[] newData = Shared.CryptData(encrypt, origData, dataKey, counterEnc);
_io.Stream.Position = _io.Stream.Position - 0x1000;
_io.Writer.Write(newData);
}
return true;
}
private void CryptHeaderCik(bool encrypt)
{
if ((!encrypt && CikIsDecrypted) || IsXvcFile)
{
CikIsDecrypted = true;
return;
}
if (!OdkKeyLoaded)
return;
var cipher = new AesCipher(OdkKey);
if (encrypt)
{
cipher.EncryptBlock(Header.EncryptedCIK, 0, 0x10, Header.EncryptedCIK, 0);
cipher.EncryptBlock(Header.EncryptedCIK, 0x10, 0x10, Header.EncryptedCIK, 0x10);
}
else
{
cipher.DecryptBlock(Header.EncryptedCIK, 0, 0x10, Header.EncryptedCIK, 0);
cipher.DecryptBlock(Header.EncryptedCIK, 0x10, 0x10, Header.EncryptedCIK, 0x10);
}
CikIsDecrypted = !encrypt;
}
static byte[] CryptBlock(bool encrypt, byte[] data, int dataOffset, int dataLength, byte[] iv, AesCipher cipher)
{
var newData = new byte[dataLength];
//if (!encrypt)
for (int i = 0; i < dataLength; i++)
{
newData[i] = (byte)(data[dataOffset + i] ^ iv[i % iv.Length]);
}
var cryptData = new byte[dataLength];
if (encrypt)
{
cipher.EncryptBlock(newData, 0, dataLength, cryptData, 0);
}
else
{
cipher.DecryptBlock(newData, 0, dataLength, cryptData, 0);
}
for (int i = 0; i < dataLength; i++)
{
cryptData[i] = (byte)(cryptData[i] ^ iv[i % iv.Length]);
}
return(cryptData);
}
