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package org.spongycastle.jcajce.provider.asymmetric.util;
import org.spongycastle.crypto.engines.IESEngine;
import org.spongycastle.jce.spec.IESParameterSpec;
public class IESUtil
{
public static IESParameterSpec guessParameterSpec(IESEngine engine)
{
if (engine.getCipher() == null)
{
return new IESParameterSpec(null, null, 128);
}
else if (engine.getCipher().getUnderlyingCipher().getAlgorithmName().equals("DES") ||
engine.getCipher().getUnderlyingCipher().getAlgorithmName().equals("RC2") ||
engine.getCipher().getUnderlyingCipher().getAlgorithmName().equals("RC5-32") ||
engine.getCipher().getUnderlyingCipher().getAlgorithmName().equals("RC5-64"))
{
return new IESParameterSpec(null, null, 64, 64);
}
else if (engine.getCipher().getUnderlyingCipher().getAlgorithmName().equals("SKIPJACK"))
{
return new IESParameterSpec(null, null, 80, 80);
}
else if (engine.getCipher().getUnderlyingCipher().getAlgorithmName().equals("GOST28147"))
{
return new IESParameterSpec(null, null, 256, 256);
}
return new IESParameterSpec(null, null, 128, 128);
}
}
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