public Tuple <PublicKeyLamportDiffie, PrivateKeyLamportDiffie> GenerateKeys()
{
BigInteger[,] private_key_array = new BigInteger[256, 2];
BigInteger[,] public_key_array = new BigInteger[256, 2];
for (int index_key = 0; index_key < private_key_array.GetLength(0); index_key++)
{
private_key_array[index_key, 0] = d_random.RandomPositiveBigIntegerOfSizeInBits(256);
private_key_array[index_key, 1] = d_random.RandomPositiveBigIntegerOfSizeInBits(256);
public_key_array[index_key, 0] = d_hash_key.Compute(private_key_array[index_key, 0]);
public_key_array[index_key, 1] = d_hash_key.Compute(private_key_array[index_key, 1]);
}
PublicKeyLamportDiffie public_key = new PublicKeyLamportDiffie(private_key_array);
PrivateKeyLamportDiffie private_key = new PrivateKeyLamportDiffie(public_key_array);
return(new Tuple <PublicKeyLamportDiffie, PrivateKeyLamportDiffie>(public_key, private_key));
}
public bool Verify(BigInteger message, BigInteger[] signature, PublicKeyLamportDiffie public_key)
{
BigInteger message_hash = d_hash_message.Compute(message);
BigInteger[,] key_array = public_key.KeyArray();
for (int index_key = 0; index_key < signature.Length; index_key++)
{
if (message_hash.IsBitSet(index_key))// check bit is set)
{
if (d_hash_key.Compute(signature[index_key]) != key_array[index_key, 0])
{
return(false);
}
}
else
{
if (d_hash_key.Compute(signature[index_key]) != key_array[index_key, 1])
{
return(false);
}
}
}
return(true);
}
