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

Introduction

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

Prototype

public DigestRandomGenerator(Digest digest) 

Source Link

Usage

From source file:at.archistar.crypto.random.BCDigestRandomSource.java

public BCDigestRandomSource() {
    this.drng = new DigestRandomGenerator(new SHA1Digest());
}

---

From source file:com.licel.jcardsim.crypto.RandomDataImpl.java

License:Apache License

public RandomDataImpl() {
    engine = new DigestRandomGenerator(new SHA1Digest());
}

---

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

License:Apache License

/**
 * Generates salt with the given length.
 * @param size the number of bytes//from w  w  w .jav a 2 s. c om
 * @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;
}

---

From source file:net.sourceforge.keepassj2me.keydb.KeydbDatabase.java

License:Open Source License

protected int getRandom() {
    byte[] id = new byte[4];
    RandomGenerator rnd = new DigestRandomGenerator(new SHA1Digest());
    rnd.addSeedMaterial(System.currentTimeMillis());
    rnd.nextBytes(id);/*from  w  w  w  .j av a2s  . c o  m*/
    return (id[0] | (id[1] << 8) | (id[2] << 16) | (id[3] << 24));
}

---

From source file:net.sourceforge.keepassj2me.keydb.KeydbEntry.java

License:Open Source License

/**
 * Generate entry uuid//from w  ww . j a va  2s.c  o  m
 * @return uuid
 */
public byte[] createUUID() {//FIXME: make sure this is unique
    byte[] uuid = new byte[16];
    RandomGenerator rnd = new DigestRandomGenerator(new SHA1Digest());
    rnd.addSeedMaterial(System.currentTimeMillis());
    rnd.nextBytes(uuid);
    return uuid;
}

---

From source file:net.sourceforge.keepassj2me.keydb.KeydbHeader.java

License:Open Source License

/**
 * Reinitialize header/*from  www.  j av a 2 s  .c o  m*/
 * @param rounds
 */
public void reinitialize(int rounds) {
    numKeyEncRounds = rounds;
    //SecureRandom rnd = SecureRandom.getInstance("SHA1PRNG");
    //rnd.setSeed(System.currentTimeMillis());
    RandomGenerator rnd = new DigestRandomGenerator(new SHA1Digest());
    rnd.addSeedMaterial(System.currentTimeMillis());
    rnd.nextBytes(masterSeed);
    rnd.nextBytes(encryptionIV);
    rnd.nextBytes(masterSeed2);
}

---