public override bool Verify(ArraySegment <byte> signature, ArraySegment <byte> message, ArraySegment <byte> key)
{
if (signature.Array == null)
{
throw new ArgumentNullException("signature.Array");
}
if (message.Array == null)
{
throw new ArgumentNullException("message.Array");
}
if (key.Array == null)
{
throw new ArgumentNullException("key.Array");
}
if (key.Count != 32)
{
throw new ArgumentException("Invalid key size", "key");
}
if (signature.Count != 16)
{
throw new ArgumentException("Invalid signature size", "signature");
}
var tempBytes = new byte[16];//todo: remove allocation
ByteIntegerConverter.Array8LoadLittleEndian32(out Array8 <uint> internalKey, key.Array, key.Offset);
Poly1305Donna.poly1305_auth(tempBytes, 0, message.Array, message.Offset, message.Count, ref internalKey);
return(CryptoBytes.ConstantTimeEquals(new ArraySegment <byte>(tempBytes), signature));
}
public override void Sign(ArraySegment <byte> signature, ArraySegment <byte> message, ArraySegment <byte> key)
{
if (signature.Array == null)
{
throw new ArgumentNullException("signature.Array");
}
if (message.Array == null)
{
throw new ArgumentNullException("message.Array");
}
if (key.Array == null)
{
throw new ArgumentNullException("key.Array");
}
if (key.Count != 32)
{
throw new ArgumentException("Invalid key size", "key");
}
if (signature.Count != 16)
{
throw new ArgumentException("Invalid signature size", "signature");
}
Array8 <UInt32> internalKey;
ByteIntegerConverter.Array8LoadLittleEndian32(out internalKey, key.Array, key.Offset);
Poly1305Donna.poly1305_auth(signature.Array, signature.Offset, message.Array, message.Offset, message.Count, ref internalKey);
}
public override bool Verify(byte[] signature, byte[] message, byte[] key)
{
if (signature == null)
{
throw new ArgumentNullException("signature");
}
if (message == null)
{
throw new ArgumentNullException("message");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
if (signature.Length != 16)
{
throw new ArgumentException("Invalid signature size", "signature");
}
if (key.Length != 32)
{
throw new ArgumentException("Invalid key size", "key");
}
var tempBytes = new byte[16];//todo: remove allocation
ByteIntegerConverter.Array8LoadLittleEndian32(out Array8 <uint> internalKey, key, 0);
Poly1305Donna.poly1305_auth(tempBytes, 0, message, 0, message.Length, ref internalKey);
return(CryptoBytes.ConstantTimeEquals(tempBytes, signature));
}
public override byte[] Sign(byte[] message, byte[] key)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
if (key.Length != 32)
{
throw new ArgumentException("Invalid key size", "key");
}
var result = new byte[16];
Array8 <UInt32> internalKey;
ByteIntegerConverter.Array8LoadLittleEndian32(out internalKey, key, 0);
Poly1305Donna.poly1305_auth(result, 0, message, 0, message.Length, ref internalKey);
return(result);
}