/// <summary>
/// Initializes a new instance of the <see cref="Protocol"/> class.
/// </summary>
/// <param name="handshakePattern">The handshake pattern (e.q. NX or IK).</param>
/// <param name="cipher">The cipher function (AESGCM or ChaChaPoly).</param>
/// <param name="hash">The hash function (SHA256, SHA512, BLAKE2s, or BLAKE2b).</param>
/// <param name="modifiers">The combination of pattern modifiers (e.q. empty, psk0, or psk1+psk2).</param>
/// <exception cref="ArgumentNullException">
/// Thrown if the either <paramref name="handshakePattern"/>,
/// <paramref name="cipher"/>, or <paramref name="hash"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Thrown if <paramref name="modifiers"/> does not represent a valid combination of pattern modifiers.
/// </exception>
public Protocol(
HandshakePattern handshakePattern,
CipherFunction cipher,
HashFunction hash,
PatternModifiers modifiers = PatternModifiers.None)
{
Exceptions.ThrowIfNull(handshakePattern, nameof(handshakePattern));
Exceptions.ThrowIfNull(cipher, nameof(cipher));
Exceptions.ThrowIfNull(hash, nameof(hash));
HandshakePattern = handshakePattern;
Cipher = cipher;
Dh = DhFunction.Curve25519;
Hash = hash;
Modifiers = modifiers;
Name = GetName();
}
/// <summary>
/// Initializes a new instance of the <see cref="Protocol"/>
/// class using ChaChaPoly, 25519, and SHA256 functions.
/// </summary>
/// <param name="handshakePattern">The handshake pattern (e.q. NX or IK).</param>
/// <param name="modifiers">The combination of pattern modifiers (e.q. empty, psk0, or psk1+psk2).</param>
/// <exception cref="ArgumentNullException">
/// Thrown if the <paramref name="handshakePattern"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Thrown if <paramref name="modifiers"/> does not represent a valid combination of pattern modifiers.
/// </exception>
public Protocol(HandshakePattern handshakePattern, PatternModifiers modifiers = PatternModifiers.None)
: this(handshakePattern, CipherFunction.ChaChaPoly, HashFunction.Sha256, modifiers)
{
}
