Example usage for javax.crypto Cipher getInstance

List of usage examples for javax.crypto Cipher getInstance

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Introduction

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

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException

Source Link

Document

Returns a Cipher object that implements the specified transformation.

Usage

From source file:Main.java

public static byte[] encrypt(byte[] byteArray, PrivateKey privateKey) {
    Cipher cipher = null;//  w w w . j  a v  a2  s.  c  o m

    try {
        cipher = Cipher.getInstance("RSA/ECB/NoPadding");
        /*
           (define cipher (javax.crypto.Cipher.getInstance "RSA/ECB/NoPadding"))
         */
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    try {
        cipher.init(Cipher.ENCRYPT_MODE, privateKey);
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    }

    ByteArrayInputStream input = new ByteArrayInputStream(byteArray);
    ByteArrayOutputStream output = new ByteArrayOutputStream();
    try {

        while (input.available() != 0) {
            byte[] t0 = new byte[100];
            input.read(t0);
            output.write(cipher.doFinal(t0));
        }
    } catch (IllegalBlockSizeException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (BadPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return output.toByteArray();
}

From source file:com.sysfore.pos.licensemanagement.LicenceManagementUtil.java

public static String encrypt(String strToEncrypt) {
    try {//w w  w. j a v a2s  .  co m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);

        final String encryptedString = Base64.encodeBase64String(cipher.doFinal(strToEncrypt.getBytes()));
        return encryptedString;
    } catch (Exception e) {
        log.error("Error while encrypting", e);
    }
    return null;

}

From source file:Main.java

public static byte[] decrypt(byte[] byteArray, PublicKey publicKey) {
    Cipher cipher = null;/*w  w w .  j a  v a2  s  .c  o  m*/

    try {
        cipher = Cipher.getInstance("RSA/ECB/NoPadding");
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    try {

        cipher.init(Cipher.DECRYPT_MODE, publicKey);

    } catch (InvalidKeyException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    ByteArrayInputStream input = new ByteArrayInputStream(byteArray);
    ByteArrayOutputStream output = new ByteArrayOutputStream();

    try {

        while (input.available() != 0) {
            byte[] t0 = new byte[128];
            input.read(t0);
            output.write(cipher.doFinal(t0));
        }

    } catch (IllegalBlockSizeException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (BadPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return output.toByteArray();
}

From source file:Main.java

public static byte[] encrypt(byte[] input, byte[] key) throws NoSuchPaddingException, NoSuchAlgorithmException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, keySpec);
    return cipher.doFinal(input);
}

From source file:Main.java

public static byte[] decrypt(byte[] input, byte[] key) throws InvalidKeyException, NoSuchPaddingException,
        NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException {
    SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, keySpec);
    return cipher.doFinal(input);
}

From source file:encryptdecrypt.util.Security.java

public static String encrypt(String strToEncrypt) {
    try {//  w w  w  .  j a  va 2  s. c om
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        return new String(Base64.encodeBase64(cipher.doFinal(strToEncrypt.getBytes())));
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:MainClass.java

public static void desEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;// ww  w.  j  a  v a  2  s  . com

    ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("DESKey.ser"));
    key = (SecretKey) keyFile.readObject();
    keyFile.close();
    Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, key);
    CipherInputStream in = new CipherInputStream(new BufferedInputStream(new FileInputStream(f1)), cipher);
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f2));
    int i;
    do {
        i = in.read();
        if (i != -1)
            out.write(i);
    } while (i > 0);
    in.close();
    out.close();
}

From source file:MainClass.java

public static void blowfishEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;/*from  ww w .  ja  v a2s.c  o  m*/

    ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("BlowfishKey.ser"));
    key = (SecretKey) keyFile.readObject();
    keyFile.close();
    Cipher cipher = Cipher.getInstance("Blowfish/ECB/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, key);
    CipherInputStream in = new CipherInputStream(new BufferedInputStream(new FileInputStream(f1)), cipher);
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f2));
    int i;
    do {
        i = in.read();
        if (i != -1)
            out.write(i);
    } while (i > 0);
    in.close();
    out.close();
}

From source file:Main.java

private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec);
    return cipher.doFinal(encrypted);
}

From source file:Main.java

private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec);
    byte[] decrypted = cipher.doFinal(encrypted);
    return decrypted;
}