CngProvider.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Security.Cryptography;
 
public sealed class CngProvider : IEquatable<CngProvider>
{
    private static CngProvider s_msPlatformKsp;
 
    private static CngProvider s_msSmartCardKsp;
 
    private static CngProvider s_msSoftwareKsp;
 
    private readonly string _provider;
 
    public string Provider => _provider;
 
    public static CngProvider MicrosoftPlatformCryptoProvider => s_msPlatformKsp ?? (s_msPlatformKsp = new CngProvider("Microsoft Platform Crypto Provider"));
 
    public static CngProvider MicrosoftSmartCardKeyStorageProvider => s_msSmartCardKsp ?? (s_msSmartCardKsp = new CngProvider("Microsoft Smart Card Key Storage Provider"));
 
    public static CngProvider MicrosoftSoftwareKeyStorageProvider => s_msSoftwareKsp ?? (s_msSoftwareKsp = new CngProvider("Microsoft Software Key Storage Provider"));
 
    public CngProvider(string provider)
    {
        if (provider == null)
        {
            throw new ArgumentNullException("provider");
        }
        if (provider.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.Cryptography_InvalidProviderName, provider), "provider");
        }
        _provider = provider;
    }
 
    public static bool operator ==(CngProvider? left, CngProvider? right)
    {
        return left?.Equals(right) ?? ((object)right == null);
    }
 
    public static bool operator !=(CngProvider? left, CngProvider? 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 CngProvider);
    }
 
    public bool Equals([NotNullWhen(true)] CngProvider? other)
    {
        if ((object)other == null)
        {
            return false;
        }
        return _provider.Equals(other.Provider);
    }
 
    public override int GetHashCode()
    {
        return _provider.GetHashCode();
    }
 
    public override string ToString()
    {
        return _provider.ToString();
    }
}