Example usage for org.bouncycastle.crypto.prng SP800SecureRandomBuilder SP800SecureRandomBuilder

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.prng SP800SecureRandomBuilder SP800SecureRandomBuilder.

Prototype

public SP800SecureRandomBuilder() 

Source Link

Document

Basic constructor, creates a builder using an EntropySourceProvider based on the default SecureRandom with predictionResistant set to false.

Usage

From source file:org.cryptacular.generator.SecretKeyGenerator.java

License:Open Source License

/**
 * Generates a symmetric encryption key of the given length.
 *
 * @param  bitLength  Desired key length in bits.
 * @param  cipher  Cipher with with key will be used.
 *
 * @return  Symmetric encryption key./*from ww  w . j a v  a 2s . co  m*/
 */
public static SecretKey generate(final int bitLength, final BlockCipher cipher) {
    // Want as much nonce data as key bits
    final byte[] nonce = NonceUtil.timestampNonce((bitLength + 7) / 8);
    return generate(bitLength, cipher,
            new SP800SecureRandomBuilder().buildHash(new SHA256Digest(), nonce, false));
}

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