Example usage for org.bouncycastle.crypto.prng DigestRandomGenerator nextBytes

Introduction

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

Prototype

public void nextBytes(byte[] bytes) 

Source Link

Usage

From source file:hu.akarnokd.utils.crypto.CryptoUtils.java

License:Apache License

/**
 * Generates salt with the given length.
 * @param size the number of bytes//ww w  .j ava  2s .c o  m
 * @return the salt bytes
 */
@NonNull
public static byte[] generateSalt(int size) {
    Digest digest = null;

    switch (String.format(DEFAULT_SALT_ALG, DEFAULT_PBE_KEY_BITS)) {
    case "SHA224PRNG":
        digest = new SHA224Digest();
        break;
    case "SHA256PRNG":
        digest = new SHA256Digest();
        break;
    case "SHA384PRNG":
        digest = new SHA384Digest();
        break;
    case "SHA512PRNG":
        digest = new SHA512Digest();
        break;
    default:
        digest = new SHA1Digest();
    }

    DigestRandomGenerator drg = new DigestRandomGenerator(digest);
    drg.addSeedMaterial(System.currentTimeMillis());
    byte[] r = new byte[size];
    drg.nextBytes(r);
    return r;
}

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