/*
 * Copyright (c) 2000 - 2020 The Legion of the Bouncy Castle Inc. (https://www.bouncycastle.org) 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this 
 * software and associated documentation files (the "Software"), to deal in the 
 * Software without restriction, including without limitation the rights to use, 
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 
 * the Software, and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies 
 * or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
 * PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 * 
 */
using System.Security.Cryptography;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;

namespace ThirdParty.Org.BouncyCastle.Security
{
    /// <summary>
    /// A class containing methods to interface the BouncyCastle world to the .NET Crypto world.
    /// </summary>
    public sealed class DotNetUtilities
    {
        public static RsaKeyParameters GetRsaPublicKey(RSA rsa)
        {
            return GetRsaPublicKey(rsa.ExportParameters(false));
        }

        public static RsaKeyParameters GetRsaPublicKey(RSAParameters rp)
        {
            return new RsaKeyParameters(
                false,
                new BigInteger(1, rp.Modulus),
                new BigInteger(1, rp.Exponent));
        }

        public static AsymmetricCipherKeyPair GetRsaKeyPair(RSA rsa)
        {
            return GetRsaKeyPair(rsa.ExportParameters(true));
        }

        public static AsymmetricCipherKeyPair GetRsaKeyPair(RSAParameters rp)
        {
            BigInteger modulus = new BigInteger(1, rp.Modulus);
            BigInteger pubExp = new BigInteger(1, rp.Exponent);

            RsaKeyParameters pubKey = new RsaKeyParameters(
                false,
                modulus,
                pubExp);

            RsaPrivateCrtKeyParameters privKey = new RsaPrivateCrtKeyParameters(
                modulus,
                pubExp,
                new BigInteger(1, rp.D),
                new BigInteger(1, rp.P),
                new BigInteger(1, rp.Q),
                new BigInteger(1, rp.DP),
                new BigInteger(1, rp.DQ),
                new BigInteger(1, rp.InverseQ));

            return new AsymmetricCipherKeyPair(pubKey, privKey);
        }
    }
}