// 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));
}
public virtual bool CheckEDATRenameKey(sbyte[] fileName, sbyte[] hash, sbyte[] data)
{
// Set up MAC context.
pgdMacContext = new AMCTRL.BBMac_Ctx();
// Perform hash check.
amctrl.hleDrmBBMacInit(pgdMacContext, 3);
amctrl.hleDrmBBMacUpdate(pgdMacContext, data, 0x30);
amctrl.hleDrmBBMacUpdate(pgdMacContext, fileName, fileName.Length);
// Get the fixed rename key.
sbyte[] renameKey = new sbyte[0x10];
for (int i = 0; i < 0x10; i++)
{
renameKey[i] = unchecked ((sbyte)(KeyVault.drmRenameKey[i] & 0xFF));
}
// Compare and return.
return(amctrl.hleDrmBBMacFinal2(pgdMacContext, hash, renameKey) == 0);
}
public virtual sbyte[] GetEDATPGDKey(sbyte[] inbuf, int size)
{
// Setup the crypto and keygen modes and initialize both context structs.
int macEncMode;
int pgdFlag = 2;
pgdMacContext = new AMCTRL.BBMac_Ctx();
// Align the buffer to 16-bytes.
int alignedSize = ((size + 0xF) >> 4) << 4;
sbyte[] dataBuf = new sbyte[alignedSize];
// Fully copy the contents of the encrypted file.
Array.Copy(inbuf, 0, dataBuf, 0, size);
int keyIndex = dataBuf[0x4];
int drmType = dataBuf[0x8];
if ((drmType & 0x1) == 0x1)
{
macEncMode = 1;
pgdFlag |= 4;
if (keyIndex > 0x1)
{
macEncMode = 3;
pgdFlag |= 8;
}
}
else
{
macEncMode = 2;
}
// Get fixed DNAS keys.
sbyte[] dnasKey = new sbyte[0x10];
if ((pgdFlag & 0x2) == 0x2)
{
for (int i = 0; i < KeyVault.drmDNASKey1.Length; i++)
{
dnasKey[i] = unchecked ((sbyte)(KeyVault.drmDNASKey1[i] & 0xFF));
}
}
else if ((pgdFlag & 0x1) == 0x1)
{
for (int i = 0; i < KeyVault.drmDNASKey2.Length; i++)
{
dnasKey[i] = unchecked ((sbyte)(KeyVault.drmDNASKey2[i] & 0xFF));
}
}
else
{
return(null);
}
// Get mac80 from input.
sbyte[] macKey80 = new sbyte[0x10];
Array.Copy(dataBuf, 0x80, macKey80, 0, 0x10);
// Get mac70 from input.
sbyte[] macKey70 = new sbyte[0x10];
Array.Copy(dataBuf, 0x70, macKey70, 0, 0x10);
// MAC_0x80
amctrl.hleDrmBBMacInit(pgdMacContext, macEncMode);
amctrl.hleDrmBBMacUpdate(pgdMacContext, dataBuf, 0x80);
amctrl.hleDrmBBMacFinal2(pgdMacContext, macKey80, dnasKey);
// MAC_0x70
amctrl.hleDrmBBMacInit(pgdMacContext, macEncMode);
amctrl.hleDrmBBMacUpdate(pgdMacContext, dataBuf, 0x70);
// Get the decryption key from BBMAC.
return(amctrl.GetKeyFromBBMac(pgdMacContext, macKey70));
}
