Examples of org.bouncycastle.crypto.engines.AESLightEngine

org.bouncycastle.crypto.engines.AESLightEngine

nist.gov/encryption/aes/">http://csrc.nist.gov/encryption/aes/. This implementation is based on optimizations from Dr. Brian Gladman's paper and C code at http://fp.gladman.plus.com/cryptography_technology/rijndael/ There are three levels of tradeoff of speed vs memory Because java has no preprocessor, they are written as three separate classes from which to choose The fastest uses 8Kbytes of static tables to precompute round calculations, 4 256 word tables for encryption and 4 for decryption. The middle performance version uses only one 256 word table for each, for a total of 2Kbytes, adding 12 rotate operations per round to compute the values contained in the other tables from the contents of the first The slowest version uses no static tables at all and computes the values in each round.

This file contains the slowest performance version with no static tables for round precomputation, but it has the smallest foot print.

    }
    
    /** 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);
    }

        throw new IOException("Mark/reset not supported");
    }
    
    public static AEADInputStream createAES(InputStream is, byte[] key) throws IOException {
        AESEngine mainCipher = new AESEngine();
        AESLightEngine hashCipher = new AESLightEngine();
        return new AEADInputStream(is, key, hashCipher, mainCipher);
    }

Examples of org.bouncycastle.crypto.engines.AESLightEngine

Related Classes of org.bouncycastle.crypto.engines.AESLightEngine