Example usage for java.security SecureRandom generateSeed

Introduction

In this page you can find the example usage for java.security SecureRandom generateSeed.

Prototype

public byte[] generateSeed(int numBytes) 

Source Link

Document

Returns the given number of seed bytes, computed using the seed generation algorithm that this class uses to seed itself.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    System.out.println(Arrays.toString(sr.generateSeed(8)));
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    int seedByteCount = 10;
    byte[] seed = sr.generateSeed(seedByteCount);
}

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From source file:com.amazonaws.cognito.sync.devauth.client.AmazonCognitoSampleDeveloperAuthenticationClient.java

/**
 * Creates a 128 bit random string..//from  www.j a  v a2  s.co  m
 */
public static String generateRandomString() {
    SecureRandom random = new SecureRandom();
    byte[] randomBytes = random.generateSeed(16);
    String randomString = new String(Hex.encodeHex(randomBytes));
    return randomString;
}

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From source file:com.axelor.apps.account.ebics.certificate.KeyUtil.java

/**
 * Generates a random password//from  w  w w.jav  a2  s  . c  o m
 *
 * @return the password
 */
public static String generatePassword() {
    SecureRandom random;

    try {
        random = SecureRandom.getInstance("SHA1PRNG");
        String pwd = Base64.encodeBase64String(random.generateSeed(5));

        return pwd.substring(0, pwd.length() - 2);
    } catch (NoSuchAlgorithmException e) {
        return "changeit";
    }
}

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From source file:org.linagora.linshare.core.utils.HashUtils.java

/**
 * generate salt (32 bits/4 octets)//from   w ww  .j  a  va2  s. c om
 * @return
 */
public static byte[] getSalt() {
    // Get 32 random bits
    byte[] mybytes;
    try {
        // Create a secure random number generator
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

        // Create secure number generator with seed
        int seedByteCount = 10;
        byte[] seed = sr.generateSeed(seedByteCount);

        sr = SecureRandom.getInstance("SHA1PRNG");
        sr.setSeed(seed);

        mybytes = new byte[32 / 8];
        sr.nextBytes(mybytes);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
    return mybytes;
}

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From source file:Main.java

public static String generateNonce() {
    try {/* ww w. j  ava  2  s .  c om*/
        // Create a secure random number generator
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

        // Get 1024 random bits
        byte[] bytes = new byte[1024 / 8];
        sr.nextBytes(bytes);

        // Create two secure number generators with the same seed
        int seedByteCount = 10;
        byte[] seed = sr.generateSeed(seedByteCount);

        sr = SecureRandom.getInstance("SHA1PRNG");
        sr.setSeed(seed);
        SecureRandom sr2 = SecureRandom.getInstance("SHA1PRNG");
        sr2.setSeed(seed);

        String nonce = Long.toHexString(sr2.nextLong());
        nonce = nonce.substring(0, 7);

        return nonce;

    } catch (NoSuchAlgorithmException e) {
    }
    return null;
}

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From source file:com.aimluck.eip.util.ALCommonUtils.java

/**
 * ID??SecureRandom????//w w w .j a  va  2s  .  c  o  m
 * 
 * @return random ID??SecureRandom
 */
public static SecureRandom getSecureRandom() {
    SecureRandom random = null;
    try {
        random = SecureRandom.getInstance(DEF_RANDOM_ALGORITHM);
        byte seed[] = random.generateSeed(DEF_RANDOM_LENGTH);
        random.setSeed(seed);
    } catch (Exception e) {
        logger.error("ALCommonUtils.getSecureRandom", e);
        return null;
    }
    return random;
}

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From source file:pt.aptoide.backupapps.data.webservices.ManagerUploads.java

public static String generateBoundary() {
    try {//from   ww w.  ja  v  a 2 s . co m
        // Create a secure random number generator
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

        // Get 1024 random bits
        byte[] bytes = new byte[1024 / 8];
        sr.nextBytes(bytes);

        int seedByteCount = 10;
        byte[] seed = sr.generateSeed(seedByteCount);

        sr = SecureRandom.getInstance("SHA1PRNG");
        sr.setSeed(seed);

        return "***" + Long.toString(sr.nextLong()) + "***";

    } catch (NoSuchAlgorithmException e) {
    }
    return "*********";
}

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From source file:com.example.ExerciseMe.tvmclient.AmazonTVMClient.java

/**
 * Creates a 128-bit random string.//w ww  .  j a v  a  2s .c  o  m
 */
public String generateRandomString() {
    SecureRandom random = new SecureRandom();
    byte[] randomBytes = random.generateSeed(16);
    return new String(Hex.encodeHex(randomBytes));
}

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From source file:com.ad.mediasharing.tvmclient.AmazonTVMClient.java

/**
 * Creates a 128-bit random string./*from   w  w  w.  j  a  v a  2  s  .c  o m*/
 */
public String generateRandomString() {
    SecureRandom random = new SecureRandom();
    byte[] randomBytes = random.generateSeed(16);
    String randomString = new String(Hex.encodeHex(randomBytes));
    return randomString;
}

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