Example usage for javax.crypto Cipher ENCRYPT_MODE

Introduction

In this page you can find the example usage for javax.crypto Cipher ENCRYPT_MODE.

Prototype

int ENCRYPT_MODE

To view the source code for javax.crypto Cipher ENCRYPT_MODE.

Click Source Link

Document

Constant used to initialize cipher to encryption mode.

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);
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");

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

    cDec.init(Cipher.DECRYPT_MODE, sKey, new PBEParameterSpec(salt, iterationCount));

    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:MainClass.java

public static void main(String args[]) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    SecretKey key = KeyGenerator.getInstance("DES").generateKey();

    // for CBC; must be 8 bytes
    byte[] initVector = new byte[] { 0x10, 0x10, 0x01, 0x04, 0x01, 0x01, 0x01, 0x02 };

    AlgorithmParameterSpec algParamSpec = new IvParameterSpec(initVector);
    Cipher m_encrypter = Cipher.getInstance("DES/CBC/PKCS5Padding");
    Cipher m_decrypter = Cipher.getInstance("DES/CBC/PKCS5Padding");

    m_encrypter.init(Cipher.ENCRYPT_MODE, key, algParamSpec);
    m_decrypter.init(Cipher.DECRYPT_MODE, key, algParamSpec);

    FileInputStream fis = new FileInputStream("cipherTest.in");
    FileOutputStream fos = new FileOutputStream("cipherTest.out");
    int dataInputSize = fis.available();

    byte[] inputBytes = new byte[dataInputSize];
    fis.read(inputBytes);//from   w  ww .ja  va2s . com
    write(inputBytes, fos);
    fos.flush();
    fis.close();
    fos.close();

    String inputFileAsString = new String(inputBytes);
    System.out.println("INPUT FILE CONTENTS\n" + inputFileAsString + "\n");

    System.out.println("File encrypted and saved to disk\n");

    fis = new FileInputStream("cipherTest.out");

    byte[] decrypted = new byte[dataInputSize];
    read(decrypted, fis);

    fis.close();
    String decryptedAsString = new String(decrypted);

    System.out.println("DECRYPTED FILE:\n" + decryptedAsString + "\n");

}

---

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[] ivBytes = new byte[] { 0x00, 0x00, 0x00, 0x01, 0x04, 0x05, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x01 };/*from w  w w .  j av  a 2 s.  c o m*/

    Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
    KeyGenerator generator = KeyGenerator.getInstance("AES", "BC");

    generator.init(192);

    Key encryptionKey = generator.generateKey();

    System.out.println("key   : " + Utils.toHex(encryptionKey.getEncoded()));
    System.out.println("input : " + new String(input));

    // encryption pass
    cipher.init(Cipher.ENCRYPT_MODE, encryptionKey, new IvParameterSpec(ivBytes));
    byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
    int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
    ctLength += cipher.doFinal(cipherText, ctLength);

    // decryption pass
    Key decryptionKey = new SecretKeySpec(encryptionKey.getEncoded(), encryptionKey.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, decryptionKey, new IvParameterSpec(ivBytes));
    byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
    int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
    ptLength += cipher.doFinal(plainText, ptLength);
    System.out.println("plain : " + new String(plainText) + " bytes: " + ptLength);
}

---

From source file:com.cfs.util.AESCriptografia.java

public static void main(String[] args) {
    AESCriptografia aes = new AESCriptografia();
    String msg = "Teste4";
    String key = "8TScvUZRTmS8V6hd/cZt/A==";

    try {/*from w w w  .ja v a  2s .c  o  m*/
        System.out.println("                 AES - " + aes.testeCifrar(msg, key));
        String teste = "AES/ECB/PKCS5PADDING";
        Cipher cipher = Cipher.getInstance(teste);
        cipher.init(Cipher.ENCRYPT_MODE, aes.gerarChave(key));
        byte[] original = msg.getBytes();
        byte[] cifrada = cipher.doFinal(original);
        byte[] retorno = Base64.encodeBase64(cifrada);

        System.out.println(teste + " - " + new String(retorno));
    } catch (Exception e) {
        System.out.println(Utilities.getInstance().getLineNumber() + e.getLocalizedMessage());
    }
}

---

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[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
            0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };
    byte[] ivBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x01 };/*from   w  ww  . ja v a 2s  . c om*/

    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
    IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
    Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
    System.out.println("input : " + new String(input));

    // encryption pass
    cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
    ByteArrayInputStream bIn = new ByteArrayInputStream(input);
    CipherInputStream cIn = new CipherInputStream(bIn, cipher);
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();

    int ch;
    while ((ch = cIn.read()) >= 0) {
        bOut.write(ch);
    }

    byte[] cipherText = bOut.toByteArray();

    System.out.println("cipher: " + new String(cipherText));

    // decryption pass
    cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
    bOut = new ByteArrayOutputStream();
    CipherOutputStream cOut = new CipherOutputStream(bOut, cipher);
    cOut.write(cipherText);
    cOut.close();
    System.out.println("plain : " + new String(bOut.toByteArray()));
}

---

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new BouncyCastleProvider());
    SecureRandom random = new SecureRandom();
    IvParameterSpec ivSpec = createCtrIvForAES(1, random);
    Key key = createKeyForAES(256, random);
    Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
    String input = "www.java2s.com";
    Mac mac = Mac.getInstance("DES", "BC");
    byte[] macKeyBytes = "12345678".getBytes();
    Key macKey = new SecretKeySpec(macKeyBytes, "DES");
    System.out.println("input : " + input);

    // encryption step
    cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
    byte[] cipherText = new byte[cipher.getOutputSize(input.length() + mac.getMacLength())];
    int ctLength = cipher.update(input.getBytes(), 0, input.length(), cipherText, 0);
    mac.init(macKey);//from  w  w  w. j a  v a2s  .com
    mac.update(input.getBytes());
    ctLength += cipher.doFinal(mac.doFinal(), 0, mac.getMacLength(), cipherText, ctLength);
    System.out.println("cipherText : " + new String(cipherText));

    // decryption step
    cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
    byte[] plainText = cipher.doFinal(cipherText, 0, ctLength);
    int messageLength = plainText.length - mac.getMacLength();

    mac.init(macKey);
    mac.update(plainText, 0, messageLength);

    byte[] messageHash = new byte[mac.getMacLength()];
    System.arraycopy(plainText, messageLength, messageHash, 0, messageHash.length);

    System.out.println("plain : " + new String(plainText) + " verified: "
            + MessageDigest.isEqual(mac.doFinal(), messageHash));
}

---

From source file:TestCipher.java

public static void main(String args[]) throws Exception {
    Set set = new HashSet();
    Random random = new Random();
    for (int i = 0; i < 10; i++) {
        Point point = new Point(random.nextInt(1000), random.nextInt(2000));
        set.add(point);//from   w w w. ja v  a 2  s .c o m
    }
    int last = random.nextInt(5000);

    // Create Key
    byte key[] = password.getBytes();
    DESKeySpec desKeySpec = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = keyFactory.generateSecret(desKeySpec);

    // Create Cipher
    Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    desCipher.init(Cipher.ENCRYPT_MODE, secretKey);

    // Create stream
    FileOutputStream fos = new FileOutputStream("out.des");
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    CipherOutputStream cos = new CipherOutputStream(bos, desCipher);
    ObjectOutputStream oos = new ObjectOutputStream(cos);

    // Write objects
    oos.writeObject(set);
    oos.writeInt(last);
    oos.flush();
    oos.close();

    // Change cipher mode
    desCipher.init(Cipher.DECRYPT_MODE, secretKey);

    // Create stream
    FileInputStream fis = new FileInputStream("out.des");
    BufferedInputStream bis = new BufferedInputStream(fis);
    CipherInputStream cis = new CipherInputStream(bis, desCipher);
    ObjectInputStream ois = new ObjectInputStream(cis);

    // Read objects
    Set set2 = (Set) ois.readObject();
    int last2 = ois.readInt();
    ois.close();

    // Compare original with what was read back
    int count = 0;
    if (set.equals(set2)) {
        System.out.println("Set1: " + set);
        System.out.println("Set2: " + set2);
        System.out.println("Sets are okay.");
        count++;
    }
    if (last == last2) {
        System.out.println("int1: " + last);
        System.out.println("int2: " + last2);
        System.out.println("ints are okay.");
        count++;
    }
    if (count != 2) {
        System.out.println("Problem during encryption/decryption");
    }
}

---

From source file:DataStudioCrak.java

public static void main(String[] args) {
    String company = "labthink";
    byte[] companyByteArray = company.getBytes();
    byte[] companyByteIntArray = intToByteArray(compute(companyByteArray, companyByteArray.length));
    // byte[] ff = "zhulixia".getBytes();
    byte[] snByte = new byte[32];
    byte[] byte1 = new byte[] { 7, 1 };
    byte[] byte2 = "zhaodapengpojiehahahahahaha".getBytes();
    byte[] byte3 = new byte[] { 127 };
    byte[] snMain = new byte[24];
    System.arraycopy(byte1, 0, snMain, 0, 2);
    System.arraycopy(byte2, 0, snMain, 2, 17);
    System.arraycopy(companyByteIntArray, 0, snMain, 19, 4);
    System.arraycopy(byte3, 0, snMain, 23, 1);
    //  1 - single license,2 - site license ,3 educational license
    snMain[2] = (byte) 1;
    int intSn = compute(snMain, snMain.length);
    System.out.println("intSn=" + intSn);
    byte[] key1 = "dddd".getBytes();
    byte[] key2 = intToByteArray(intSn);
    byte[] key = new byte[8];
    System.arraycopy(key1, 0, key, 0, 4);
    System.arraycopy(key2, 0, key, 4, 4);

    byte encodedSnMain[] = new byte[snMain.length];
    try {/*  w w  w . j  a va 2 s.  com*/
        DESKeySpec deskeyspec = new DESKeySpec(key);
        javax.crypto.SecretKey secretkey = SecretKeyFactory.getInstance("DES").generateSecret(deskeyspec);
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, secretkey);
        cipher.update(snMain, 0, snMain.length, encodedSnMain);
        cipher.doFinal();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    System.arraycopy(key1, 0, snByte, 0, 4);
    System.arraycopy(key2, 0, snByte, 28, 4);
    System.arraycopy(encodedSnMain, 0, snByte, 4, 24);
    char[] snCharArray = Hex.encodeHex(snByte);
    String sn = new String(snCharArray);
    System.out.println("sn=" + sn);
}

---

From source file:net.labthink.run.DataStudioCrak.java

public static void main(String[] args) {
    String company = "Labthink";
    byte[] companyByteArray = company.getBytes();
    byte[] companyByteIntArray = intToByteArray(compute(companyByteArray, companyByteArray.length));
    // byte[] ff = "zhulixia".getBytes();
    byte[] snByte = new byte[32];
    byte[] byte1 = new byte[] { 7, 1 };
    byte[] byte2 = "zhaodapengpojiehahahahahaha".getBytes();
    byte[] byte3 = new byte[] { 127 };
    byte[] snMain = new byte[24];
    System.arraycopy(byte1, 0, snMain, 0, 2);
    System.arraycopy(byte2, 0, snMain, 2, 17);
    System.arraycopy(companyByteIntArray, 0, snMain, 19, 4);
    System.arraycopy(byte3, 0, snMain, 23, 1);
    //  1 - single license,2 - site license ,3 educational license
    snMain[2] = (byte) 1;
    int intSn = compute(snMain, snMain.length);
    System.out.println("intSn=" + intSn);
    byte[] key1 = "dddd".getBytes();
    byte[] key2 = intToByteArray(intSn);
    byte[] key = new byte[8];
    System.arraycopy(key1, 0, key, 0, 4);
    System.arraycopy(key2, 0, key, 4, 4);

    byte encodedSnMain[] = new byte[snMain.length];
    try {// w  w  w  .  j  a va 2  s .  c  o  m
        DESKeySpec deskeyspec = new DESKeySpec(key);
        javax.crypto.SecretKey secretkey = SecretKeyFactory.getInstance("DES").generateSecret(deskeyspec);
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, secretkey);
        cipher.update(snMain, 0, snMain.length, encodedSnMain);
        cipher.doFinal();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    System.arraycopy(key1, 0, snByte, 0, 4);
    System.arraycopy(key2, 0, snByte, 28, 4);
    System.arraycopy(encodedSnMain, 0, snByte, 4, 24);
    char[] snCharArray = Hex.encodeHex(snByte);
    String sn = new String(snCharArray);
    System.out.println("sn=" + sn);
}

---

From source file:AESTest.java

public static void main(String[] args) {
    try {/*from   w w w. j  av a 2  s .  c o  m*/
        if (args[0].equals("-genkey")) {
            KeyGenerator keygen = KeyGenerator.getInstance("AES");
            SecureRandom random = new SecureRandom();
            keygen.init(random);
            SecretKey key = keygen.generateKey();
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
            out.writeObject(key);
            out.close();
        } else {
            int mode;
            if (args[0].equals("-encrypt"))
                mode = Cipher.ENCRYPT_MODE;
            else
                mode = Cipher.DECRYPT_MODE;

            ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
            Key key = (Key) keyIn.readObject();
            keyIn.close();

            InputStream in = new FileInputStream(args[1]);
            OutputStream out = new FileOutputStream(args[2]);
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(mode, key);

            crypt(in, out, cipher);
            in.close();
            out.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (GeneralSecurityException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}

---

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