Examples with SecureRandom java.security.SecureRandom used on opensource projects

Example 91 with SecureRandom

use of java.security.SecureRandom in project OpenAttestation by OpenAttestation.

the class X509Builder method randomSerial.

public X509Builder randomSerial() {
    try {
        BigInteger sn = new BigInteger(64, new SecureRandom());
        certificateSerialNumber = new CertificateSerialNumber(sn);
        info.set(X509CertInfo.SERIAL_NUMBER, certificateSerialNumber);
    } catch (Exception e) {
        fault(e, "randomSerial");
    }
    return this;
}

Example 92 with SecureRandom

use of java.security.SecureRandom in project OpenAttestation by OpenAttestation.

the class CertificateUtils method generateSelfSignedX509Certificate.

/**
	 * Generate a self signed X509 certificate with Bouncy Castle.
	 * @throws SignatureException 
	 * @throws IllegalStateException 
	 * @throws InvalidKeyException 
	 * @throws CertificateEncodingException 
	 */
public static X509Certificate generateSelfSignedX509Certificate() throws NoSuchAlgorithmException, NoSuchProviderException, CertificateEncodingException, InvalidKeyException, IllegalStateException, SignatureException {
    Security.addProvider(new BouncyCastleProvider());
    int validityDays = 3652;
    // GENERATE THE PUBLIC/PRIVATE RSA KEY PAIR
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA", "BC");
    keyPairGenerator.initialize(1024, new SecureRandom());
    KeyPair keyPair = keyPairGenerator.generateKeyPair();
    // GENERATE THE X509 CERTIFICATE
    X509V1CertificateGenerator certGen = new X509V1CertificateGenerator();
    X500Principal dnName = new X500Principal("CN=OATServer");
    certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis()));
    certGen.setSubjectDN(dnName);
    // use the same
    certGen.setIssuerDN(dnName);
    certGen.setNotBefore(new java.sql.Time(System.currentTimeMillis()));
    Calendar expiry = Calendar.getInstance();
    expiry.add(Calendar.DAY_OF_YEAR, validityDays);
    certGen.setNotAfter(expiry.getTime());
    certGen.setPublicKey(keyPair.getPublic());
    certGen.setSignatureAlgorithm("SHA256WithRSAEncryption");
    X509Certificate cert = certGen.generate(keyPair.getPrivate(), "BC");
    return cert;
}

Example 93 with SecureRandom

use of java.security.SecureRandom in project OpenAttestation by OpenAttestation.

the class CitrixClient method generateSessionId.

private String generateSessionId() throws NoSuchAlgorithmException {
    // Create a secure random number generator
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    // Get 1024 random bits
    byte[] seed = new byte[1];
    sr.nextBytes(seed);
    sr = SecureRandom.getInstance("SHA1PRNG");
    sr.setSeed(seed);
    int nextInt = sr.nextInt();
    String sessionId = "" + ((nextInt < 0) ? nextInt * -1 : nextInt);
    log.info("Session Id Generated [" + sessionId + "]");
    return sessionId;
}

Example 94 with SecureRandom

use of java.security.SecureRandom in project OpenAttestation by OpenAttestation.

the class CitrixClient method generateNonce.

public String generateNonce() {
    try {
        // Create a secure random number generator
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
        // Get 1024 random bits
        byte[] bytes = new byte[16];
        sr.nextBytes(bytes);
        //            nonce = new BASE64Encoder().encode( bytes);
        String nonce = Base64.encodeBase64String(bytes);
        log.info("Nonce Generated " + nonce);
        return nonce;
    } catch (NoSuchAlgorithmException e) {
        throw new ASException(e);
    }
}

Example 95 with SecureRandom

use of java.security.SecureRandom in project languagetool by languagetool-org.

the class HTTPTools method disableCertChecks.

/**
   * For testing, we disable all checks because we use a self-signed certificate on the server
   * side and we want this test to run everywhere without importing the certificate into the JVM's trust store.
   *
   * See http://stackoverflow.com/questions/2893819/telling-java-to-accept-self-signed-ssl-certificate
   */
static void disableCertChecks() throws NoSuchAlgorithmException, KeyManagementException {
    TrustManager[] trustAllCerts = { new X509TrustManager() {

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }

        @Override
        public void checkClientTrusted(X509Certificate[] certs, String authType) {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] certs, String authType) {
        }
    } };
    SSLContext sc = SSLContext.getInstance("SSL");
    sc.init(null, trustAllCerts, new SecureRandom());
    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
}