using System;
using System.Runtime.InteropServices;
using Mono.Security.Cryptography;

namespace System.Security.Cryptography
{
	/// <summary>Decrypts Optimal Asymmetric Encryption Padding (OAEP) key exchange data.</summary>
	// Token: 0x0200051D RID: 1309
	[ComVisible(true)]
	public class RSAOAEPKeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter
	{
		/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.RSAOAEPKeyExchangeDeformatter" /> class.</summary>
		// Token: 0x06003030 RID: 12336 RVA: 0x0009DCC4 File Offset: 0x0009BEC4
		public RSAOAEPKeyExchangeDeformatter()
		{
		}

		/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.RSAOAEPKeyExchangeDeformatter" /> class with the specified key.</summary>
		/// <param name="key">The instance of the <see cref="T:System.Security.Cryptography.RSA" /> algorithm that holds the private key. </param>
		/// <exception cref="T:System.ArgumentNullException">
		///   <paramref name="key " />is null.</exception>
		// Token: 0x06003031 RID: 12337 RVA: 0x0009DCCC File Offset: 0x0009BECC
		public RSAOAEPKeyExchangeDeformatter(AsymmetricAlgorithm key)
		{
			this.SetKey(key);
		}

		/// <summary>Gets the parameters for the Optimal Asymmetric Encryption Padding (OAEP) key exchange.</summary>
		/// <returns>An XML string containing the parameters of the OAEP key exchange operation.</returns>
		// Token: 0x1700097C RID: 2428
		// (get) Token: 0x06003032 RID: 12338 RVA: 0x0009DCDC File Offset: 0x0009BEDC
		// (set) Token: 0x06003033 RID: 12339 RVA: 0x0009DCE0 File Offset: 0x0009BEE0
		public override string Parameters
		{
			get
			{
				return null;
			}
			set
			{
			}
		}

		/// <summary>Extracts secret information from the encrypted key exchange data.</summary>
		/// <returns>The secret information derived from the key exchange data.</returns>
		/// <param name="rgbData">The key exchange data within which the secret information is hidden. </param>
		/// <exception cref="T:System.Security.Cryptography.CryptographicException">The key exchange data verification has failed. </exception>
		/// <exception cref="T:System.Security.Cryptography.CryptographicUnexpectedOperationException">The key is missing.</exception>
		/// <PermissionSet>
		///   <IPermission class="System.Security.Permissions.KeyContainerPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
		/// </PermissionSet>
		// Token: 0x06003034 RID: 12340 RVA: 0x0009DCE4 File Offset: 0x0009BEE4
		public override byte[] DecryptKeyExchange(byte[] rgbData)
		{
			if (this.rsa == null)
			{
				string text = Locale.GetText("No RSA key specified");
				throw new CryptographicUnexpectedOperationException(text);
			}
			SHA1 sha = SHA1.Create();
			byte[] array = PKCS1.Decrypt_OAEP(this.rsa, sha, rgbData);
			if (array != null)
			{
				return array;
			}
			throw new CryptographicException(Locale.GetText("OAEP decoding error."));
		}

		/// <summary>Sets the private key to use for decrypting the secret information.</summary>
		/// <param name="key">The instance of the <see cref="T:System.Security.Cryptography.RSA" /> algorithm that holds the private key. </param>
		/// <exception cref="T:System.ArgumentNullException">
		///   <paramref name="key" /> is null.</exception>
		// Token: 0x06003035 RID: 12341 RVA: 0x0009DD3C File Offset: 0x0009BF3C
		public override void SetKey(AsymmetricAlgorithm key)
		{
			this.rsa = (RSA)key;
		}

		// Token: 0x0400139B RID: 5019
		private RSA rsa;
	}
}