// Plain PGD handling functions.
public virtual sbyte[] DecryptPGD(sbyte[] inbuf, int size, sbyte[] key, int seed)
{
// Setup the crypto and keygen modes and initialize both context structs.
int sdEncMode = 1;
int sdGenMode = 2;
pgdMacContext = new AMCTRL.BBMac_Ctx();
pgdCipherContext = new AMCTRL.BBCipher_Ctx();
// Align the buffers to 16-bytes.
int alignedSize = ((size + 0xF) >> 4) << 4;
sbyte[] outbuf = new sbyte[alignedSize - 0x10];
sbyte[] dataBuf = new sbyte[alignedSize];
// Fully copy the contents of the encrypted file.
Array.Copy(inbuf, 0, dataBuf, 0, size);
amctrl.hleDrmBBMacInit(pgdMacContext, sdEncMode);
amctrl.hleDrmBBCipherInit(pgdCipherContext, sdEncMode, sdGenMode, dataBuf, key, seed);
amctrl.hleDrmBBMacUpdate(pgdMacContext, dataBuf, 0x10);
Array.Copy(dataBuf, 0x10, outbuf, 0, alignedSize - 0x10);
amctrl.hleDrmBBMacUpdate(pgdMacContext, outbuf, alignedSize - 0x10);
amctrl.hleDrmBBCipherUpdate(pgdCipherContext, outbuf, alignedSize - 0x10);
return(outbuf);
}
/*
* sceNpDrm - npdrm.prx
*/
public virtual sbyte[] hleNpDrmGetFixedKey(sbyte[] hash, sbyte[] data, int mode)
{
// Setup the crypto and keygen modes and initialize both context structs.
AMCTRL.BBMac_Ctx bbctx = new AMCTRL.BBMac_Ctx();
AES128 aes = new AES128("AES/CBC/NoPadding");
// Get the encryption key.
sbyte[] encKey = new sbyte[0x10];
if ((mode & 0x1) == 0x1)
{
for (int i = 0; i < 0x10; i++)
{
encKey[i] = unchecked ((sbyte)(KeyVault.drmEncKey1[i] & 0xFF));
}
}
else if ((mode & 0x2) == 0x2)
{
for (int i = 0; i < 0x10; i++)
{
encKey[i] = unchecked ((sbyte)(KeyVault.drmEncKey2[i] & 0xFF));
}
}
else if ((mode & 0x3) == 0x3)
{
for (int i = 0; i < 0x10; i++)
{
encKey[i] = unchecked ((sbyte)(KeyVault.drmEncKey3[i] & 0xFF));
}
}
else
{
return(null);
}
// Get the fixed key.
sbyte[] fixedKey = new sbyte[0x10];
for (int i = 0; i < 0x10; i++)
{
fixedKey[i] = unchecked ((sbyte)(KeyVault.drmFixedKey[i] & 0xFF));
}
// Call the BBMac functions.
amctrl.hleDrmBBMacInit(bbctx, 1);
amctrl.hleDrmBBMacUpdate(bbctx, data, data.Length);
amctrl.hleDrmBBMacFinal(bbctx, hash, fixedKey);
// Encrypt and return the hash.
return(aes.encrypt(hash, encKey, iv));
}
