/** For unit tests only */ static AEADOutputStream innerCreateAES(OutputStream os, byte[] key, Random random) throws IOException { AESEngine mainCipher = new AESEngine(); AESLightEngine hashCipher = new AESLightEngine(); byte[] nonce = new byte[mainCipher.getBlockSize()]; random.nextBytes(nonce); nonce[0] &= 0x7F; return new AEADOutputStream(os, key, nonce, hashCipher, mainCipher); }