private int decryptData(FileStream ii, FileStream o, NPD npd, EDATData data, byte[] rifkey)
{
int numBlocks = (int)((data.getFileLen() + data.getBlockSize() - 1) / data.getBlockSize());
int metadataSectionSize = ((data.getFlags() & FLAG_COMPRESSED) != 0 || (data.getFlags() & FLAG_0x20) != 0) ? 0x20 : 0x10;
int baseOffset = 0x100; //+ offset (unknown)
for (int i = 0; i < numBlocks; i++)
{
ii.Seek(baseOffset + i * metadataSectionSize, SeekOrigin.Begin);
byte[] expectedHash = new byte[0x10];
long offset;
int len;
int compressionEndBlock = 0;
if ((data.getFlags() & FLAG_COMPRESSED) != 0)
{
byte[] metadata = new byte[0x20];
ii.Read(metadata, 0, metadata.Length);
byte[] result = decryptMetadataSection(metadata);
offset = (int)(ConversionUtils.be64(result, 0)); // + offset (unknown)
len = (int)(ConversionUtils.be32(result, 8));
compressionEndBlock = (int)(ConversionUtils.be32(result, 0xC));
ConversionUtils.arraycopy(metadata, 0, expectedHash, 0, 0x10);
}
else if ((data.getFlags() & FLAG_0x20) != 0)
{
//NOT TESTED: CASE WHERE METADATASECTION IS 0x20 BYTES LONG
byte[] metadata = new byte[0x20];
ii.Read(metadata, 0, metadata.Length);
for (int j = 0; j < 0x10; j++)
{
expectedHash[j] = (byte)(metadata[j] ^ metadata[j + 0x10]);
}
offset = baseOffset + i * data.getBlockSize() + numBlocks * metadataSectionSize;
len = (int)(data.getBlockSize());
if (i == numBlocks - 1)
{
len = (int)(data.getFileLen() % (new BigInteger(data.getBlockSize())));
}
}
else
{
ii.Read(expectedHash, 0, expectedHash.Length);
offset = baseOffset + i * data.getBlockSize() + numBlocks * metadataSectionSize;
len = (int)(data.getBlockSize());
if (i == numBlocks - 1)
{
len = (int)(data.getFileLen() % (new BigInteger(data.getBlockSize())));
}
}
int realLen = len;
len = (int)((uint)(len + 0xF) & 0xFFFFFFF0);
Debug.Print("Offset: %016X, len: %08X, realLen: %08X, endCompress: %d\r\n", offset, len, realLen, compressionEndBlock);
ii.Seek(offset, SeekOrigin.Begin);
byte[] encryptedData = new byte[len];
byte[] decryptedData = new byte[len];
ii.Read(encryptedData, 0, encryptedData.Length);
byte[] key = new byte[0x10];
byte[] hash = new byte[0x10];
byte[] blockKey = calculateBlockKey(i, npd);
ToolsImpl.aesecbEncrypt(rifkey, blockKey, 0, key, 0, blockKey.Length);
if ((data.getFlags() & FLAG_0x10) != 0)
{
ToolsImpl.aesecbEncrypt(rifkey, key, 0, hash, 0, key.Length);
}
else
{
ConversionUtils.arraycopy(key, 0, hash, 0, key.Length);
}
int cryptoFlag = ((data.getFlags() & FLAG_0x02) == 0) ? 0x2 : 0x1;
int hashFlag;
if ((data.getFlags() & FLAG_0x10) == 0)
{
hashFlag = 0x02;
}
else if ((data.getFlags() & FLAG_0x20) == 0)
{
hashFlag = 0x04;
}
else
{
hashFlag = 0x01;
}
if ((data.getFlags() & FLAG_KEYENCRYPTED) != 0)
{
cryptoFlag |= 0x10000000;
hashFlag |= 0x10000000;
}
if ((data.getFlags() & FLAG_DEBUG) != 0)
{
cryptoFlag |= 0x01000000;
hashFlag |= 0x01000000;
}
AppLoader a = new AppLoader();
byte[] iv = (npd.getVersion() <= 1)?(new byte[0x10]):npd.getDigest();
bool rresult = a.doAll(hashFlag, cryptoFlag, encryptedData, 0, decryptedData, 0, encryptedData.Length, key, npd.getDigest(), hash, expectedHash, 0);
if (!rresult)
{
Debug.WriteLine("Error decrypting block " + i);
// KDSBest find out why block 30 errors
//return STATUS_ERROR_DECRYPTING;
}
if ((data.getFlags() & FLAG_COMPRESSED) != 0)
{
//byte[] decompress = new byte[Long.valueOf(data.getBlockSize()).intValue()];
//DECOMPRESS: MISSING ALGORITHM
//out.write(decompress, 0, data.getBlockSize());
}
else
{
o.Write(decryptedData, 0, realLen);
}
}
return(STATUS_OK);
}
private int decryptData(FileStream ii, FileStream o, NPD npd, EDATData data, byte[] rifkey)
{
int numBlocks = (int) ((data.getFileLen() + data.getBlockSize() - 1) / data.getBlockSize());
int metadataSectionSize = ((data.getFlags() & FLAG_COMPRESSED) != 0 || (data.getFlags() & FLAG_0x20) != 0) ? 0x20 : 0x10;
int baseOffset = 0x100; //+ offset (unknown)
for (int i = 0; i < numBlocks; i++) {
ii.Seek(baseOffset + i * metadataSectionSize, SeekOrigin.Begin);
byte[] expectedHash = new byte[0x10];
long offset;
int len;
int compressionEndBlock = 0;
if ((data.getFlags() & FLAG_COMPRESSED) != 0) {
byte[] metadata = new byte[0x20];
ii.Read(metadata, 0, metadata.Length);
byte[] result = decryptMetadataSection(metadata);
offset = (int)(ConversionUtils.be64(result, 0)); // + offset (unknown)
len = (int)(ConversionUtils.be32(result, 8));
compressionEndBlock = (int)(ConversionUtils.be32(result, 0xC));
ConversionUtils.arraycopy(metadata, 0, expectedHash, 0, 0x10);
} else if ((data.getFlags() & FLAG_0x20) != 0) {
//NOT TESTED: CASE WHERE METADATASECTION IS 0x20 BYTES LONG
byte[] metadata = new byte[0x20];
ii.Read(metadata, 0, metadata.Length);
for (int j = 0; j<0x10;j++) {
expectedHash[j] = (byte)(metadata[j] ^ metadata[j+0x10]);
}
offset = baseOffset + i * data.getBlockSize() + numBlocks * metadataSectionSize;
len = (int)(data.getBlockSize());
if (i == numBlocks - 1) {
len = (int) (data.getFileLen() % (new BigInteger(data.getBlockSize())));
}
} else {
ii.Read(expectedHash, 0, expectedHash.Length);
offset = baseOffset + i * data.getBlockSize() + numBlocks * metadataSectionSize;
len = (int)(data.getBlockSize());
if (i == numBlocks - 1) {
len = (int) (data.getFileLen() % (new BigInteger(data.getBlockSize())));
}
}
int realLen = len;
len = (int) ((uint)(len + 0xF) & 0xFFFFFFF0);
Debug.Print("Offset: %016X, len: %08X, realLen: %08X, endCompress: %d\r\n", offset, len, realLen,compressionEndBlock);
ii.Seek(offset, SeekOrigin.Begin);
byte[] encryptedData = new byte[len];
byte[] decryptedData = new byte[len];
ii.Read(encryptedData, 0, encryptedData.Length);
byte[] key = new byte[0x10];
byte[] hash = new byte[0x10];
byte[] blockKey = calculateBlockKey(i, npd);
ToolsImpl.aesecbEncrypt(rifkey, blockKey, 0, key, 0, blockKey.Length);
if ((data.getFlags() & FLAG_0x10) != 0) {
ToolsImpl.aesecbEncrypt(rifkey, key, 0, hash, 0, key.Length);
} else {
ConversionUtils.arraycopy(key, 0, hash, 0, key.Length);
}
int cryptoFlag = ((data.getFlags() & FLAG_0x02) == 0) ? 0x2 : 0x1;
int hashFlag;
if ((data.getFlags() & FLAG_0x10) == 0) {
hashFlag = 0x02;
} else if ((data.getFlags() & FLAG_0x20) == 0) {
hashFlag = 0x04;
} else {
hashFlag = 0x01;
}
if ((data.getFlags() & FLAG_KEYENCRYPTED) != 0) {
cryptoFlag |= 0x10000000;
hashFlag |= 0x10000000;
}
if ((data.getFlags() & FLAG_DEBUG) != 0) {
cryptoFlag |= 0x01000000;
hashFlag |= 0x01000000;
}
AppLoader a = new AppLoader();
byte[] iv = (npd.getVersion() <= 1)?(new byte[0x10]):npd.getDigest();
bool rresult = a.doAll(hashFlag, cryptoFlag, encryptedData, 0, decryptedData, 0, encryptedData.Length, key, npd.getDigest(), hash, expectedHash, 0);
if (!rresult) {
Debug.WriteLine("Error decrypting block " + i);
// KDSBest find out why block 30 errors
//return STATUS_ERROR_DECRYPTING;
}
if ((data.getFlags() & FLAG_COMPRESSED) != 0) {
//byte[] decompress = new byte[Long.valueOf(data.getBlockSize()).intValue()];
//DECOMPRESS: MISSING ALGORITHM
//out.write(decompress, 0, data.getBlockSize());
} else {
o.Write(decryptedData, 0, realLen);
}
}
return STATUS_OK;
}
