CngAlgorithm.cs

Go to the documentation of this file.

using System.Diagnostics.CodeAnalysis;
 
namespace System.Security.Cryptography;
 
public sealed class CngAlgorithm : IEquatable<CngAlgorithm>
{
    private static CngAlgorithm s_ecdh;
 
    private static CngAlgorithm s_ecdhp256;
 
    private static CngAlgorithm s_ecdhp384;
 
    private static CngAlgorithm s_ecdhp521;
 
    private static CngAlgorithm s_ecdsa;
 
    private static CngAlgorithm s_ecdsap256;
 
    private static CngAlgorithm s_ecdsap384;
 
    private static CngAlgorithm s_ecdsap521;
 
    private static CngAlgorithm s_md5;
 
    private static CngAlgorithm s_sha1;
 
    private static CngAlgorithm s_sha256;
 
    private static CngAlgorithm s_sha384;
 
    private static CngAlgorithm s_sha512;
 
    private static CngAlgorithm s_rsa;
 
    private readonly string _algorithm;
 
    public string Algorithm => _algorithm;
 
    public static CngAlgorithm Rsa => s_rsa ?? (s_rsa = new CngAlgorithm("RSA"));
 
    public static CngAlgorithm ECDiffieHellman => s_ecdh ?? (s_ecdh = new CngAlgorithm("ECDH"));
 
    public static CngAlgorithm ECDiffieHellmanP256 => s_ecdhp256 ?? (s_ecdhp256 = new CngAlgorithm("ECDH_P256"));
 
    public static CngAlgorithm ECDiffieHellmanP384 => s_ecdhp384 ?? (s_ecdhp384 = new CngAlgorithm("ECDH_P384"));
 
    public static CngAlgorithm ECDiffieHellmanP521 => s_ecdhp521 ?? (s_ecdhp521 = new CngAlgorithm("ECDH_P521"));
 
    public static CngAlgorithm ECDsa => s_ecdsa ?? (s_ecdsa = new CngAlgorithm("ECDSA"));
 
    public static CngAlgorithm ECDsaP256 => s_ecdsap256 ?? (s_ecdsap256 = new CngAlgorithm("ECDSA_P256"));
 
    public static CngAlgorithm ECDsaP384 => s_ecdsap384 ?? (s_ecdsap384 = new CngAlgorithm("ECDSA_P384"));
 
    public static CngAlgorithm ECDsaP521 => s_ecdsap521 ?? (s_ecdsap521 = new CngAlgorithm("ECDSA_P521"));
 
    public static CngAlgorithm MD5 => s_md5 ?? (s_md5 = new CngAlgorithm("MD5"));
 
    public static CngAlgorithm Sha1 => s_sha1 ?? (s_sha1 = new CngAlgorithm("SHA1"));
 
    public static CngAlgorithm Sha256 => s_sha256 ?? (s_sha256 = new CngAlgorithm("SHA256"));
 
    public static CngAlgorithm Sha384 => s_sha384 ?? (s_sha384 = new CngAlgorithm("SHA384"));
 
    public static CngAlgorithm Sha512 => s_sha512 ?? (s_sha512 = new CngAlgorithm("SHA512"));
 
    public CngAlgorithm(string algorithm)
    {
        if (algorithm == null)
        {
            throw new ArgumentNullException("algorithm");
        }
        if (algorithm.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.Cryptography_InvalidAlgorithmName, algorithm), "algorithm");
        }
        _algorithm = algorithm;
    }
 
    public static bool operator ==(CngAlgorithm? left, CngAlgorithm? right)
    {
        return left?.Equals(right) ?? ((object)right == null);
    }
 
    public static bool operator !=(CngAlgorithm? left, CngAlgorithm? right)
    {
        if ((object)left == null)
        {
            return (object)right != null;
        }
        return !left.Equals(right);
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        return Equals(obj as CngAlgorithm);
    }
 
    public bool Equals([NotNullWhen(true)] CngAlgorithm? other)
    {
        if ((object)other == null)
        {
            return false;
        }
        return _algorithm.Equals(other.Algorithm);
    }
 
    public override int GetHashCode()
    {
        return _algorithm.GetHashCode();
    }
 
    public override string ToString()
    {
        return _algorithm;
    }
}