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

namespace System.Security.Cryptography
{
	/// <summary>Decrypts the PKCS #1 key exchange data.</summary>
	// Token: 0x0200051F RID: 1311
	[ComVisible(true)]
	public class RSAPKCS1KeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter
	{
		/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.RSAPKCS1KeyExchangeDeformatter" /> class.</summary>
		// Token: 0x06003040 RID: 12352 RVA: 0x0009DE10 File Offset: 0x0009C010
		public RSAPKCS1KeyExchangeDeformatter()
		{
		}

		/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.RSAPKCS1KeyExchangeDeformatter" /> 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: 0x06003041 RID: 12353 RVA: 0x0009DE18 File Offset: 0x0009C018
		public RSAPKCS1KeyExchangeDeformatter(AsymmetricAlgorithm key)
		{
			this.SetKey(key);
		}

		/// <summary>Gets the parameters for the PKCS #1 key exchange.</summary>
		/// <returns>An XML string containing the parameters of the PKCS #1 key exchange operation.</returns>
		// Token: 0x17000980 RID: 2432
		// (get) Token: 0x06003042 RID: 12354 RVA: 0x0009DE28 File Offset: 0x0009C028
		// (set) Token: 0x06003043 RID: 12355 RVA: 0x0009DE2C File Offset: 0x0009C02C
		public override string Parameters
		{
			get
			{
				return null;
			}
			set
			{
			}
		}

		/// <summary>Gets or sets the random number generator algorithm to use in the creation of the key exchange.</summary>
		/// <returns>The instance of a random number generator algorithm to use.</returns>
		// Token: 0x17000981 RID: 2433
		// (get) Token: 0x06003044 RID: 12356 RVA: 0x0009DE30 File Offset: 0x0009C030
		// (set) Token: 0x06003045 RID: 12357 RVA: 0x0009DE38 File Offset: 0x0009C038
		public RandomNumberGenerator RNG
		{
			get
			{
				return this.random;
			}
			set
			{
				this.random = value;
			}
		}

		/// <summary>Extracts secret information from the encrypted key exchange data.</summary>
		/// <returns>The secret information derived from the key exchange data.</returns>
		/// <param name="rgbIn">The key exchange data within which the secret information is hidden. </param>
		/// <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: 0x06003046 RID: 12358 RVA: 0x0009DE44 File Offset: 0x0009C044
		public override byte[] DecryptKeyExchange(byte[] rgbIn)
		{
			if (this.rsa == null)
			{
				throw new CryptographicUnexpectedOperationException(Locale.GetText("No key pair available."));
			}
			byte[] array = PKCS1.Decrypt_v15(this.rsa, rgbIn);
			if (array != null)
			{
				return array;
			}
			throw new CryptographicException(Locale.GetText("PKCS1 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: 0x06003047 RID: 12359 RVA: 0x0009DE90 File Offset: 0x0009C090
		public override void SetKey(AsymmetricAlgorithm key)
		{
			this.rsa = (RSA)key;
		}

		// Token: 0x0400139F RID: 5023
		private RSA rsa;

		// Token: 0x040013A0 RID: 5024
		private RandomNumberGenerator random;
	}
}