ddn.crypto.cipher.chacha

ChaCha20 Stream Cipher (RFC 7539).

Types 1

ChaCha20 Implementation.

Supports 32-byte keys. Supports 12-byte nonce (RFC 7539) and 8-byte nonce (Legacy).

Fields

private uint[16] _state

private uint[16] _initialState

private ubyte[64] _keystream

private size_t _keystreamIdx

private bool _initialized

private bool _isRFC7539

private uint[4] SIGMA

Methods

void init(CipherOperation op, Key key, const(ubyte)[] iv = null)

ubyte[] update(const(ubyte)[] input)

ubyte[] finish(const(ubyte)[] input = null)

void setCounter(ulong counter)Manually sets the counter. Useful for random access or specific protocols. Params: counter = The counter value.

private void generateBlock()

private void quarterRound(int a, int b, int c, int d)

private uint rotateLeft(uint x, int n) pure nothrow @nogc

private uint readU32(const(ubyte)[] data, size_t offset)