Example usage for java.security SecureRandom nextInt

Introduction

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

Prototype

public int nextInt(int bound) 

Source Link

Document

Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.

Usage

From source file:net.solarnetwork.node.setup.impl.DefaultKeystoreService.java

private String generateNewKeyStorePassword() {
    String manualKeyStorePassword = super.getKeyStorePassword();
    if (manualKeyStorePassword != null && manualKeyStorePassword.length() > 0) {
        return manualKeyStorePassword;
    }//from  www .j  a va  2 s. co m
    try {
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        final int start = 32;
        final int end = 126;
        final int range = end - start;
        char[] passwd = new char[PASSWORD_LENGTH];
        for (int i = 0; i < PASSWORD_LENGTH; i++) {
            passwd[i] = (char) (random.nextInt(range) + start);
        }
        return new String(passwd);
    } catch (NoSuchAlgorithmException e) {
        throw new CertificateException("Error creating random password", e);
    }
}

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From source file:tv.phantombot.PhantomBot.java

public static String generateRandomString(int length) {
    String randomAllowed = "01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    char[] randomChars = randomAllowed.toCharArray();
    char[] randomBuffer;

    randomBuffer = new char[length];
    SecureRandom random = new SecureRandom();
    for (int i = 0; i < randomBuffer.length; i++) {
        randomBuffer[i] = randomChars[random.nextInt(randomChars.length)];
    }//  w w w  .j a va2s . com
    return new String(randomBuffer);
}

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From source file:org.wso2.carbon.device.mgt.jaxrs.service.impl.UserManagementServiceImpl.java

private String generateInitialUserPassword() {
    int passwordLength = 6;
    //defining the pool of characters to be used for initial password generation
    String lowerCaseCharset = "abcdefghijklmnopqrstuvwxyz";
    String upperCaseCharset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    String numericCharset = "0123456789";
    SecureRandom randomGenerator = new SecureRandom();
    String totalCharset = lowerCaseCharset + upperCaseCharset + numericCharset;
    int totalCharsetLength = totalCharset.length();
    StringBuilder initialUserPassword = new StringBuilder();
    for (int i = 0; i < passwordLength; i++) {
        initialUserPassword.append(totalCharset.charAt(randomGenerator.nextInt(totalCharsetLength)));
    }/*from   ww w.j av  a2  s  .  co  m*/
    if (log.isDebugEnabled()) {
        log.debug("Initial user password is created for new user: " + initialUserPassword);
    }
    return initialUserPassword.toString();
}

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From source file:me.gloriouseggroll.quorrabot.Quorrabot.java

private static String generateWebAuth() {
    String randomAllowed = "01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    char[] randomChars = randomAllowed.toCharArray();
    char[] randomBuffer;

    randomBuffer = new char[30];
    SecureRandom random = new SecureRandom();
    for (int i = 0; i < randomBuffer.length; i++) {
        randomBuffer[i] = randomChars[random.nextInt(randomChars.length)];
    }/*from   w  ww  .j  av  a 2  s  .  c om*/
    return new String(randomBuffer);
}

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From source file:me.gloriouseggroll.quorrabot.Quorrabot.java

/**
 * gen a random string//w  w  w .j  a  v  a2 s . c om
 */
private static String generateRandomString(int length) {
    String randomAllowed = "01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    char[] randomChars = randomAllowed.toCharArray();
    char[] randomBuffer;

    randomBuffer = new char[length];
    SecureRandom random = new SecureRandom();
    for (int i = 0; i < randomBuffer.length; i++) {
        randomBuffer[i] = randomChars[random.nextInt(randomChars.length)];
    }
    return new String(randomBuffer);
}

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From source file:me.mast3rplan.phantombot.PhantomBot.java

private static String generateRandomString(int length) {
    String randomAllowed = "01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    char[] randomChars = randomAllowed.toCharArray();
    char[] randomBuffer;

    randomBuffer = new char[length];
    SecureRandom random = new SecureRandom();
    for (int i = 0; i < randomBuffer.length; i++) {
        randomBuffer[i] = randomChars[random.nextInt(randomChars.length)];
    }/* w w  w .  j  a  va2  s.  com*/
    return new String(randomBuffer);
}

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From source file:org.sofun.platform.web.rest.resource.ejb.MemberResourceBean.java

@Override
public Response debitMember(Map<String, String> params) throws ReSTException {

    final String email = params.get("email");

    Member member = getCoreMemberByEmail(email);
    if (!MemberAccountStatus.VERIFIED_FR.equals(member.getAccountStatus())) {
        return Response.status(401).entity("Account has not been verified.").build();
    }// w w w  .j av a  2s . c o  m

    final float txnAmount = Float.valueOf(params.get("txn_amount"));
    final String txnCurrency = params.get("txn_currency");

    if (txnAmount == 0 || txnCurrency == null) {
        return Response.status(401).entity("Missing information.").build();
    }

    if (getMemberService().getTransferableAmountFor(member) < txnAmount) {
        return Response.status(401).entity("Balance is too low for such a wire.").build();
    }

    SecureRandom randomGenerator = new SecureRandom();
    MemberTransaction txn = new MemberTransactionImpl(new Date(), txnAmount, txnCurrency,
            MemberTransactionType.WIRE_DEBIT);
    txn.setLabel(MemberTransactionType.WIRE_DEBIT);
    txn.setDebit(true);
    txn.setCredit(false);
    // txnId will be updated after the actual bank transaction will be
    // performed out of process.
    txn.setTransactionId(String.valueOf(randomGenerator.nextInt(1000000000)));
    member.addTransaction(txn);
    txn.setMember(member);

    return Response.status(202).entity("OK").build();

}

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From source file:com.vmware.identity.idm.server.config.directory.DirectoryConfigStore.java

private String randomKey() {
    SecureRandom random = new SecureRandom();
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < 16; i++)
        sb.append((char) (random.nextInt(96) + 32));
    return sb.toString();
}

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From source file:com.vmware.identity.idm.server.IdentityManager.java

private String createSessionId() {
    SecureRandom randomGenerator = new SecureRandom();
    int sessionId = randomGenerator.nextInt(1000000);
    return String.valueOf(sessionId);
}

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