CngKeyBlobFormat.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Security.Cryptography;
 
public sealed class CngKeyBlobFormat : IEquatable<CngKeyBlobFormat>
{
    private static CngKeyBlobFormat s_eccPrivate;
 
    private static CngKeyBlobFormat s_eccPublic;
 
    private static CngKeyBlobFormat s_eccFullPrivate;
 
    private static CngKeyBlobFormat s_eccFullPublic;
 
    private static CngKeyBlobFormat s_genericPrivate;
 
    private static CngKeyBlobFormat s_genericPublic;
 
    private static CngKeyBlobFormat s_opaqueTransport;
 
    private static CngKeyBlobFormat s_pkcs8Private;
 
    private readonly string _format;
 
    public string Format => _format;
 
    public static CngKeyBlobFormat EccPrivateBlob => s_eccPrivate ?? (s_eccPrivate = new CngKeyBlobFormat("ECCPRIVATEBLOB"));
 
    public static CngKeyBlobFormat EccPublicBlob => s_eccPublic ?? (s_eccPublic = new CngKeyBlobFormat("ECCPUBLICBLOB"));
 
    public static CngKeyBlobFormat EccFullPrivateBlob => s_eccFullPrivate ?? (s_eccFullPrivate = new CngKeyBlobFormat("ECCFULLPRIVATEBLOB"));
 
    public static CngKeyBlobFormat EccFullPublicBlob => s_eccFullPublic ?? (s_eccFullPublic = new CngKeyBlobFormat("ECCFULLPUBLICBLOB"));
 
    public static CngKeyBlobFormat GenericPrivateBlob => s_genericPrivate ?? (s_genericPrivate = new CngKeyBlobFormat("PRIVATEBLOB"));
 
    public static CngKeyBlobFormat GenericPublicBlob => s_genericPublic ?? (s_genericPublic = new CngKeyBlobFormat("PUBLICBLOB"));
 
    public static CngKeyBlobFormat OpaqueTransportBlob => s_opaqueTransport ?? (s_opaqueTransport = new CngKeyBlobFormat("OpaqueTransport"));
 
    public static CngKeyBlobFormat Pkcs8PrivateBlob => s_pkcs8Private ?? (s_pkcs8Private = new CngKeyBlobFormat("PKCS8_PRIVATEKEY"));
 
    public CngKeyBlobFormat(string format)
    {
        if (format == null)
        {
            throw new ArgumentNullException("format");
        }
        if (format.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.Cryptography_InvalidKeyBlobFormat, format), "format");
        }
        _format = format;
    }
 
    public static bool operator ==(CngKeyBlobFormat? left, CngKeyBlobFormat? right)
    {
        return left?.Equals(right) ?? ((object)right == null);
    }
 
    public static bool operator !=(CngKeyBlobFormat? left, CngKeyBlobFormat? 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 CngKeyBlobFormat);
    }
 
    public bool Equals([NotNullWhen(true)] CngKeyBlobFormat? other)
    {
        if ((object)other == null)
        {
            return false;
        }
        return _format.Equals(other.Format);
    }
 
    public override int GetHashCode()
    {
        return _format.GetHashCode();
    }
 
    public override string ToString()
    {
        return _format;
    }
}