desedeparameters.java

来自「java 文件下载器。可自定义」· Java 代码 · 共 40 行

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   DESedeParameters.java

package org.bouncycastle.crypto.params;


// Referenced classes of package org.bouncycastle.crypto.params:
//			DESParameters

public class DESedeParameters extends DESParameters
{

	public static final int DES_EDE_KEY_LENGTH = 24;

	public DESedeParameters(byte key[])
	{
		super(key);
		if (isWeakKey(key, 0, 0))
			throw new IllegalArgumentException("attempt to create weak DESede key");
		else
			return;
	}

	public static boolean isWeakKey(byte key[], int offset, int length)
	{
		for (int i = offset; i < length; i += 8)
			if (DESParameters.isWeakKey(key, i))
				return true;

		return false;
	}

	public static boolean isWeakKey(byte key[], int offset)
	{
		return isWeakKey(key, offset, key.length - offset);
	}
}