Example usage for javax.crypto Cipher ENCRYPT_MODE

List of usage examples for javax.crypto Cipher ENCRYPT_MODE

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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.

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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 = "input".getBytes();
    byte[] keyBytes = "input123".getBytes();

    SecretKeySpec key = new SecretKeySpec(keyBytes, "ARC4");

    Cipher cipher = Cipher.getInstance("ARC4", "BC");

    byte[] cipherText = new byte[input.length];

    cipher.init(Cipher.ENCRYPT_MODE, key);

    int ctLength = cipher.update(input, 0, input.length, cipherText, 0);

    ctLength += cipher.doFinal(cipherText, ctLength);

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

    byte[] plainText = new byte[ctLength];

    cipher.init(Cipher.DECRYPT_MODE, key);

    int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);

    ptLength += cipher.doFinal(plainText, ptLength);

    System.out.println("plain text : " + new String(plainText));
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");

    keyGenerator.init(128);/*  w  w  w  .j av a 2 s  .  co m*/
    Key secretKey = keyGenerator.generateKey();

    Cipher cipherOut = Cipher.getInstance("Blowfish/CFB/NoPadding");

    cipherOut.init(Cipher.ENCRYPT_MODE, secretKey);
    BASE64Encoder encoder = new BASE64Encoder();
    byte iv[] = cipherOut.getIV();
    if (iv != null) {
        System.out.println("Initialization Vector of the Cipher:\n" + encoder.encode(iv));
    }
    FileInputStream fin = new FileInputStream("inputFile.txt");
    FileOutputStream fout = new FileOutputStream("outputFile.txt");
    CipherOutputStream cout = new CipherOutputStream(fout, cipherOut);
    int input = 0;
    while ((input = fin.read()) != -1) {
        cout.write(input);
    }

    fin.close();
    cout.close();
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    SecretKey secretKey;//from  w w w .j a  v  a 2s.c  o  m
    Cipher encrypter, decrypter;

    secretKey = KeyGenerator.getInstance("DES").generateKey();

    encrypter = Cipher.getInstance("DES");
    encrypter.init(Cipher.ENCRYPT_MODE, secretKey);

    decrypter = Cipher.getInstance("DES");
    decrypter.init(Cipher.DECRYPT_MODE, secretKey);

    MyClass cust, unsealed;
    SealedObject sealed;

    cust = new MyClass();
    cust.name = "Paul";
    cust.password = "password";

    // Seal it, storing it in a SealedObject
    sealed = (new SealedObject(cust, encrypter));

    // Try unsealing it
    String algorithmName = sealed.getAlgorithm();
    System.out.println(algorithmName);
    unsealed = (MyClass) sealed.getObject(decrypter);

    System.out.println("NAME: " + unsealed.name);
    System.out.println("PASSWORD: " + unsealed.password);

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "input".getBytes();
    byte[] keyBytes = new byte[] { 0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd, (byte) 0xef };

    SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");

    Cipher cipher = Cipher.getInstance("DES/ECB/PKCS7Padding", "BC");

    cipher.init(Cipher.ENCRYPT_MODE, key);

    byte[] cipherText = new byte[cipher.getOutputSize(input.length)];

    int ctLength = cipher.update(input, 0, input.length, cipherText, 0);

    ctLength += cipher.doFinal(cipherText, ctLength);

    cipher.init(Cipher.DECRYPT_MODE, key);

    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));
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "input".getBytes();
    byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
            0x0d, 0x0e, 0x0f };//w w  w.  j  av a 2  s  .co m

    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");

    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");

    cipher.init(Cipher.ENCRYPT_MODE, key);

    byte[] cipherText = new byte[cipher.getOutputSize(input.length)];

    int ctLength = cipher.update(input, 0, input.length, cipherText, 0);

    ctLength += cipher.doFinal(cipherText, ctLength);

    cipher.init(Cipher.DECRYPT_MODE, key);
    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));
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "input123".getBytes();
    byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c,
            0x0d, 0x0e, 0x0f };/*from   www .  j  ava2s.  co  m*/

    SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
    Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding", "BC");

    byte[] cipherText = new byte[input.length];
    cipher.init(Cipher.ENCRYPT_MODE, key);

    int ctLength = cipher.update(input, 0, input.length, cipherText, 0);

    ctLength += cipher.doFinal(cipherText, ctLength);

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

    byte[] plainText = new byte[ctLength];

    cipher.init(Cipher.DECRYPT_MODE, key);

    int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);

    ptLength += cipher.doFinal(plainText, ptLength);

    System.out.println("plain text : " + new String(plainText) + " bytes: " + ptLength);
}

From source file:MainClass.java

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

    byte[] input = "input".getBytes();
    byte[] keyBytes = "input123".getBytes();
    byte[] ivBytes = "12345123".getBytes();

    SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");
    IvParameterSpec ivSpec = new IvParameterSpec(new byte[8]);
    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS7Padding", "BC");

    cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);

    byte[] cipherText = new byte[cipher.getOutputSize(ivBytes.length + input.length)];

    int ctLength = cipher.update(ivBytes, 0, ivBytes.length, cipherText, 0);

    ctLength += cipher.update(input, 0, input.length, cipherText, ctLength);

    ctLength += cipher.doFinal(cipherText, ctLength);

    cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);

    byte[] buf = new byte[cipher.getOutputSize(ctLength)];

    int bufLength = cipher.update(cipherText, 0, ctLength, buf, 0);

    bufLength += cipher.doFinal(buf, bufLength);

    byte[] plainText = new byte[bufLength - ivBytes.length];

    System.arraycopy(buf, ivBytes.length, plainText, 0, plainText.length);

    System.out.println("plain : " + new String(plainText));
}

From source file:MainClass.java

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

    byte[] input = "input".getBytes();
    byte[] keyBytes = "input123".getBytes();
    byte[] msgNumber = "input".getBytes();

    IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);

    SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");

    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS7Padding", "BC");

    cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);

    IvParameterSpec encryptionIv = new IvParameterSpec(cipher.doFinal(msgNumber), 0, 8);

    cipher.init(Cipher.ENCRYPT_MODE, key, encryptionIv);

    byte[] cipherText = new byte[cipher.getOutputSize(input.length)];

    int ctLength = cipher.update(input, 0, input.length, cipherText, 0);

    ctLength += cipher.doFinal(cipherText, ctLength);

    System.out.println("cipher: " + new String(cipherText) + " bytes: " + ctLength);
    cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);

    IvParameterSpec decryptionIv = new IvParameterSpec(cipher.doFinal(msgNumber), 0, 8);

    cipher.init(Cipher.DECRYPT_MODE, key, decryptionIv);

    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, ptLength));
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    SecretKey key = KeyGenerator.getInstance("DES").generateKey();
    writeToFile("secretkey.dat", key);
    Cipher cipher = Cipher.getInstance("DES");
    cipher.init(Cipher.ENCRYPT_MODE, key);
    SealedObject sealedObject = new SealedObject("THIS IS A SECRET MESSAGE!", cipher);
    writeToFile("sealed.dat", sealedObject);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
    keyGenerator.init(128);/*w w w  .j a va2 s .  com*/
    Key blowfishKey = keyGenerator.generateKey();

    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(1024);
    KeyPair keyPair = keyPairGenerator.genKeyPair();

    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(Cipher.ENCRYPT_MODE, keyPair.getPublic());

    byte[] blowfishKeyBytes = blowfishKey.getEncoded();
    System.out.println(new String(blowfishKeyBytes));
    byte[] cipherText = cipher.doFinal(blowfishKeyBytes);
    System.out.println(new String(cipherText));
    cipher.init(Cipher.DECRYPT_MODE, keyPair.getPrivate());

    byte[] decryptedKeyBytes = cipher.doFinal(cipherText);
    System.out.println(new String(decryptedKeyBytes));
    SecretKey newBlowfishKey = new SecretKeySpec(decryptedKeyBytes, "Blowfish");
}