Example usage for javax.crypto.spec PBEKeySpec PBEKeySpec

Introduction

In this page you can find the example usage for javax.crypto.spec PBEKeySpec PBEKeySpec.

Prototype

public PBEKeySpec(char[] password, byte[] salt, int iterationCount) 

Source Link

Document

Constructor that takes a password, salt, iteration count for generating PBEKey of fixed-key-size PBE ciphers.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    byte[] keyBytes = new byte[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72, 0x06, 0x75,
            0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03, (byte) 0xdd, (byte) 0xd9,
            0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
    byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6, 0x08,
            (byte) 0xb8 };

    // encrypt the data using precalculated keys

    Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");
    cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(ivBytes));

    byte[] out = cEnc.doFinal(input);
    // decrypt the data using PBE

    char[] password = "password".toCharArray();
    byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
    int iterationCount = 2048;
    PBEKeySpec pbeSpec = new PBEKeySpec(password, salt, iterationCount);
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES");

    Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES");
    Key sKey = keyFact.generateSecret(pbeSpec);

    cDec.init(Cipher.DECRYPT_MODE, sKey);

    System.out.println("cipher : " + new String(out));
    System.out.println("gen key: " + new String(sKey.getEncoded()));
    System.out.println("gen iv : " + new String(cDec.getIV()));
    System.out.println("plain  : " + new String(cDec.doFinal(out)));
}

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From source file:Main.java

private static SecretKey getKeyFromPassphrase(String passphrase, byte[] salt, int iterations)
        throws GeneralSecurityException {
    PBEKeySpec keyspec = new PBEKeySpec(passphrase.toCharArray(), salt, iterations);
    SecretKeyFactory skf = SecretKeyFactory.getInstance("PBEWITHSHA1AND128BITAES-CBC-BC");
    return skf.generateSecret(keyspec);
}

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From source file:Main.java

private static int generateIterationCount(String passphrase, byte[] salt) {
    int TARGET_ITERATION_TIME = 50; //ms
    int MINIMUM_ITERATION_COUNT = 100; //default for low-end devices
    int BENCHMARK_ITERATION_COUNT = 10000; //baseline starting iteration count

    try {/*from w ww.j a  v  a  2  s. co m*/
        PBEKeySpec keyspec = new PBEKeySpec(passphrase.toCharArray(), salt, BENCHMARK_ITERATION_COUNT);
        SecretKeyFactory skf = SecretKeyFactory.getInstance("PBEWITHSHA1AND128BITAES-CBC-BC");

        long startTime = System.currentTimeMillis();
        skf.generateSecret(keyspec);
        long finishTime = System.currentTimeMillis();

        int scaledIterationTarget = (int) (((double) BENCHMARK_ITERATION_COUNT
                / (double) (finishTime - startTime)) * TARGET_ITERATION_TIME);

        if (scaledIterationTarget < MINIMUM_ITERATION_COUNT)
            return MINIMUM_ITERATION_COUNT;
        else
            return scaledIterationTarget;
    } catch (NoSuchAlgorithmException e) {
        Log.w("MasterSecretUtil", e);
        return MINIMUM_ITERATION_COUNT;
    } catch (InvalidKeySpecException e) {
        Log.w("MasterSecretUtil", e);
        return MINIMUM_ITERATION_COUNT;
    }
}

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From source file:Main.java

private static SecretKey getKeyFromPassphrase(String passphrase, byte[] salt) throws GeneralSecurityException {
    PBEKeySpec keyspec = new PBEKeySpec(passphrase.toCharArray(), salt, 100);
    SecretKeyFactory skf = SecretKeyFactory.getInstance("PBEWITHSHA1AND128BITAES-CBC-BC");
    return skf.generateSecret(keyspec);
}

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From source file:com.aspose.showcase.qrcodegen.web.api.util.StringEncryptor.java

public static String encrypt(String data, String password) throws Exception {

    Security.addProvider(new BouncyCastleProvider());
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");

    final Random r = new SecureRandom();
    byte[] salt = new byte[SALT_SIZE];
    r.nextBytes(salt);/*from   www. j  ava 2  s . c  o m*/

    SecretKeyFactory fact = SecretKeyFactory.getInstance("PBEWITHMD5AND128BITAES-CBC-OPENSSL", "BC");

    cipher.init(Cipher.ENCRYPT_MODE,
            fact.generateSecret(new PBEKeySpec(password.toCharArray(), salt, PBE_KEY_SALE_SIZE)));

    byte[] encVal = cipher.doFinal(data.getBytes());

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    // writing encrypted data along with the salt in the format readable by
    // open ssl api
    bos.write("Salted__".getBytes());
    bos.write(salt);
    bos.write(encVal);
    String encryptedValue = new String(Base64.encode(bos.toByteArray()));
    bos.close();

    return encryptedValue;

}

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From source file:DesEncrypter.java

DesEncrypter(String passPhrase) throws Exception {
    int iterationCount = 2;
    KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
    SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
    ecipher = Cipher.getInstance(key.getAlgorithm());
    dcipher = Cipher.getInstance(key.getAlgorithm());

    AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);

    ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
    dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
}

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From source file:com.tesora.dve.common.PECryptoUtils.java

private static Cipher createCrypter(int mode) throws Exception {
    // Create the key
    KeySpec keySpec = new PBEKeySpec(settings.getPassword().toCharArray(), settings.getSalt(),
            settings.getIterations());/* www  . jav a2s  .c  om*/
    SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);

    Cipher cipher = Cipher.getInstance(key.getAlgorithm());

    cipher.init(mode, key, new PBEParameterSpec(settings.getSalt(), settings.getIterations()));

    return cipher;
}

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From source file:passworddecoder.DesEncrypter.java

DesEncrypter(String passPhrase) {
    KeySpec keySpec;/* w w w  .j  av a 2s . c  om*/
    try {
        keySpec = new PBEKeySpec(passPhrase.toCharArray(), this.salt, this.iterationCount);
        SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
        this.dcipher = Cipher.getInstance(key.getAlgorithm());

        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(this.salt, this.iterationCount);

        this.dcipher.init(2, key, paramSpec);
    } catch (InvalidAlgorithmParameterException e) {
    } catch (InvalidKeySpecException e) {
    } catch (NoSuchPaddingException e) {
    } catch (NoSuchAlgorithmException e) {
    } catch (InvalidKeyException e) {
    }
}

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From source file:com.aerohive.nms.engine.admin.task.licensemgr.common.AerohiveEncryptTool.java

public AerohiveEncryptTool(String arg_Key) {
    if (arg_Key != null && !arg_Key.trim().equals(""))
        m_Str_Key = arg_Key;

    try {/* w w  w .  j  a v a  2s. c  o  m*/
        // Create the key
        KeySpec keySpec = new PBEKeySpec(m_Str_Key.toCharArray(), m_Byte_Salt, m_Int_IterationCount);
        SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
        m_Cipher_Ecipher = Cipher.getInstance(key.getAlgorithm());
        m_Cipher_Dcipher = Cipher.getInstance(key.getAlgorithm());

        // Prepare the parameter to the ciphers
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(m_Byte_Salt, m_Int_IterationCount);

        // Create the ciphers
        m_Cipher_Ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
        m_Cipher_Dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
    } catch (Exception e) {
        //DebugUtil.commonDebugWarn(e.getMessage());
    }
}

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From source file:DesEncrypter.java

private DesEncrypter(String passPhrase) {
    try {/*from w w w . j  a  va 2  s. c o m*/
        // Create the key
        KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
        SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
        ecipher = Cipher.getInstance(key.getAlgorithm());
        dcipher = Cipher.getInstance(key.getAlgorithm());

        // Prepare the parameter to the ciphers
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);

        // Create the ciphers
        ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
        dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
    } catch (java.security.InvalidAlgorithmParameterException e) {
    } catch (java.security.spec.InvalidKeySpecException e) {
    } catch (javax.crypto.NoSuchPaddingException e) {
    } catch (java.security.NoSuchAlgorithmException e) {
    } catch (java.security.InvalidKeyException e) {
    }
}

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