// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Globalization;
using System.Security.Cryptography.X509Certificates;
using System.ServiceModel;
 
namespace System.IdentityModel.Tokens
{
    public class X509ThumbprintKeyIdentifierClause : BinaryKeyIdentifierClause
    {
        public X509ThumbprintKeyIdentifierClause(X509Certificate2 certificate)
            : this(GetHash(certificate), false)
        {
        }
 
        public X509ThumbprintKeyIdentifierClause(byte[] thumbprint)
            : this(thumbprint, true)
        {
        }
 
        internal X509ThumbprintKeyIdentifierClause(byte[] thumbprint, bool cloneBuffer)
            : base(null, thumbprint, cloneBuffer)
        {
        }
 
        private static byte[] GetHash(X509Certificate2 certificate)
        {
            if (certificate == null)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(certificate));
            }
 
            return certificate.GetCertHash();
        }
 
        public byte[] GetX509Thumbprint()
        {
            return GetBuffer();
        }
 
        public bool Matches(X509Certificate2 certificate)
        {
            if (certificate == null)
            {
                return false;
            }
 
            return Matches(GetHash(certificate));
        }
 
        public override string ToString()
        {
            return string.Format(CultureInfo.InvariantCulture, "X509ThumbprintKeyIdentifierClause(Hash = 0x{0})", ToHexString());
        }
    }
}