//
// PKCS1MaskGenerationMethod.cs: Handles PKCS#1 mask generation.
//
// Author:
//	Sebastien Pouliot (spouliot@motus.com)
//
// (C) 2002 Motus Technologies Inc. (http://www.motus.com)
//

using System;
using System.Security.Cryptography;

namespace System.Security.Cryptography {

// References:
// a.	PKCS#1: RSA Cryptography Standard 
//	http://www.rsasecurity.com/rsalabs/pkcs/pkcs-1/index.html

public class PKCS1MaskGenerationMethod : MaskGenerationMethod {
	private string hashName;

	public PKCS1MaskGenerationMethod()
	{
		hashName = "SHA1";
	}

	public string HashName 
	{
		get { return hashName; }
		set { 
			if (value == null)
				hashName = "SHA1";
			else
				hashName = value; 
		}
	}

	public override byte[] GenerateMask (byte[] mgfSeed, int maskLen)
	{
		HashAlgorithm hash = HashAlgorithm.Create (hashName);
		return PKCS1.MGF1 (hash, mgfSeed, maskLen);
	}
}

}