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The FIPS 140-2 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-2 level 1. This jar contains JCE provider and low-level API for the BC-FJA version 1.0.2, FIPS Certificate #3514. Please see certificate for certified platform details.

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package org.bouncycastle.crypto.fips;

import java.math.BigInteger;

import org.bouncycastle.crypto.internal.CipherParameters;

/**
 * Basic unblinded RSA engine implementation.
 * Used to abstract away calls to native backed RSA and Java RSA
 */
public interface RSAEngine
{
    int getInputBlockSize();

    int getOutputBlockSize();

    BigInteger convertInput(byte[] in, int inOff, int inLen);

    BigInteger processBlock(BigInteger blindedInput);

    byte[] convertOutput(BigInteger result);

    void init(boolean forEncryption, CipherParameters param);
}