public static void TestCmacTestVectors(TestData data)
{
var actual = new byte[0x10];
CryptoOld.CalculateAesCmac(data.Key, data.Message, data.Start, actual, 0, data.Length);
Assert.Equal(data.Expected, actual);
}
private Validity ValidateSignature(Keyset keyset)
{
var calculatedCmac = new byte[0x10];
CryptoOld.CalculateAesCmac(keyset.SaveMacKey, Data, 0x100, calculatedCmac, 0, 0x200);
return(Utilities.ArraysEqual(calculatedCmac, Cmac) ? Validity.Valid : Validity.Invalid);
}
public Result Commit(Keyset keyset)
{
CoreDataIvfcStorage.Flush();
FatIvfcStorage?.Flush();
Stream headerStream = BaseStorage.AsStream();
var hashData = new byte[0x3d00];
headerStream.Position = 0x300;
headerStream.Read(hashData, 0, hashData.Length);
var hash = new byte[Sha256.DigestSize];
Sha256.GenerateSha256Hash(hashData, hash);
headerStream.Position = 0x108;
headerStream.Write(hash, 0, hash.Length);
if (keyset == null || keyset.SaveMacKey.IsEmpty())
{
return(ResultFs.PreconditionViolation);
}
var cmacData = new byte[0x200];
var cmac = new byte[0x10];
headerStream.Position = 0x100;
headerStream.Read(cmacData, 0, 0x200);
CryptoOld.CalculateAesCmac(keyset.SaveMacKey, cmacData, 0, cmac, 0, 0x200);
headerStream.Position = 0;
headerStream.Write(cmac, 0, 0x10);
headerStream.Flush();
return(Result.Success);
}