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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 the debug version JCE provider and low-level API for the BC-FJA version 1.0.2.3, FIPS Certificate #3514. Please note the debug jar is not certified.

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package org.bouncycastle.crypto.general;

class DSAUtils
{
    static void reverseBytes(byte[] bytes)
    {
        byte tmp;
        for (int i = 0; i < bytes.length / 2; i++)
        {
            tmp = bytes[i];
            bytes[i] = bytes[bytes.length - 1 - i];
            bytes[bytes.length - 1 - i] = tmp;
        }
    }
}