public static byte[] GenerateOneTimeKey(ReadOnlySpan <byte> key, ReadOnlySpan <byte> nonce, uint numRounds)
{
var ivLow = 0U;
var ivHigh = BinaryPrimitives.ReadUInt32LittleEndian(nonce);
var oneTimeKey = new byte[ChaChaTransform.BlockLength];
ChaChaTransform.WriteKeyStreamBlock(ChaCha.Initialize(key, nonce, ivLow), BitwiseHelpers.ConcatBits(ivHigh, ivLow), numRounds, oneTimeKey);
return(oneTimeKey);
}
/// <summary>
/// Initializes a new instance of the <see cref="AeadChaChaPoly1305"/> class.
/// </summary>
protected AeadChaChaPoly1305(byte[] aad, ChaCha chaCha, Poly1305 poly1305)
{
m_aad = aad;
m_chaCha = chaCha;
m_poly1305 = poly1305;
}
private AeadChaCha20Poly1305(byte[] aad, ChaCha chaCha, Poly1305 poly1305) : base(aad, chaCha, poly1305)
{
}
