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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8 with debug enabled.
package org.bouncycastle.pqc.crypto.newhope;
import org.bouncycastle.crypto.engines.ChaChaEngine;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
class ChaCha20
{
static void process(byte[] key, byte[] nonce, byte[] buf, int off, int len)
{
ChaChaEngine e = new ChaChaEngine(20);
e.init(true, new ParametersWithIV(new KeyParameter(key), nonce));
e.processBytes(buf, off, len, buf, off);
}
}
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