Example usage for javax.crypto Cipher init

Introduction

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

Prototype

public final void init(int opmode, Certificate certificate) throws InvalidKeyException

Source Link

Document

Initializes this cipher with the public key from the given certificate.

Usage

From source file:love.sola.netsupport.util.RSAUtil.java

public static String decrypt(String encrypted) {
    try {//  w w  w  . j a v a 2s  .c o  m
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));
        return new String(original, StandardCharsets.UTF_8);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

From source file:aes_encryption.AES_Encryption.java

public static String decrypt(String strToDecrypt) {

    try {//  w  ww . j a va2 s .c o m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");

        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        setDecryptedString(new String(cipher.doFinal(Base64.decodeBase64(strToDecrypt))));

    } catch (Exception e) {

        System.out.println("Error while decrypting: " + e.toString());
    }
    return null;
}

From source file:com.basp.trabajo_al_minuto.model.business.BusinessSecurity.java

/**
 * Se encarga de desencriptar la contrasea ingresada por el usuario *
 */// ww w .  j ava  2s  .  c o m
public static String decrypt(String encryptValue) throws BusinessException {
    String secretKey = "e-business";
    String base64EncryptedString = "";

    try {
        byte[] message = Base64.decodeBase64(encryptValue.getBytes("utf-8"));
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher decipher = Cipher.getInstance("DESede");
        decipher.init(Cipher.DECRYPT_MODE, key);
        byte[] plainText = decipher.doFinal(message);
        base64EncryptedString = new String(plainText, "UTF-8");
    } catch (Exception ex) {
        throw new BusinessException(ex);
    }
    return base64EncryptedString;
}

From source file:Main.java

private static String des(String id, String key) throws NoSuchPaddingException, NoSuchAlgorithmException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    int index = 0;
    SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "DES");
    Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
    cipher.init(1, secretKeySpec);
    int i = id.length();
    if (i < 8) {
        i = 8 - i;/*from  w  w  w.j  a  v  a  2s  .  c  o m*/
    } else {
        i %= 8;
        i = i != 0 ? 8 - i : 0;
    }
    while (index < i) {
        id = String.valueOf(id) + "\u0000";
        index++;
    }
    return a(cipher.doFinal(id.getBytes()));
}

From source file:com.liferay.sync.engine.lan.util.LanTokenUtil.java

public static String decryptLanToken(String lanTokenKey, String encryptedToken) throws Exception {

    byte[] bytes = DigestUtils.sha1(lanTokenKey);

    bytes = Arrays.copyOf(bytes, 16);

    Cipher cipher = Cipher.getInstance("AES");

    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(bytes, "AES"));

    return new String(cipher.doFinal(Base64.decodeBase64(encryptedToken)), Charset.forName("UTF-8"));
}

From source file:com.tydic.dbp.utils.ThreeDesUtils.java

public static String encryptMode(String Src) {
    try {/*from w  ww .  j a  v  a 2  s .  co m*/
        // ?
        SecretKey deskey = new SecretKeySpec(keyBytes, Algorithm);
        // 
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.ENCRYPT_MODE, deskey);
        return Hex.encodeHexString(c1.doFinal(Src.getBytes()));
    } catch (java.security.NoSuchAlgorithmException e1) {
        e1.printStackTrace();
    } catch (javax.crypto.NoSuchPaddingException e2) {
        e2.printStackTrace();
    } catch (java.lang.Exception e3) {
        e3.printStackTrace();
    }
    return null;
}

From source file:com.tydic.dbp.utils.ThreeDesUtils.java

public static String decryptMode(String srcStr) {
    try {// w w  w  .j  av  a2  s  .c o m
        // ?
        SecretKey deskey = new SecretKeySpec(keyBytes, Algorithm);
        // 
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.DECRYPT_MODE, deskey);
        return new String(c1.doFinal(Hex.decodeHex(srcStr.toCharArray())));
    } catch (java.security.NoSuchAlgorithmException e1) {
        e1.printStackTrace();
    } catch (javax.crypto.NoSuchPaddingException e2) {
        e2.printStackTrace();
    } catch (java.lang.Exception e3) {
        e3.printStackTrace();
    }
    return null;
}

From source file:lib.clases_cripto.java

public static String Encriptar(String texto) {

    String secretKey = "qualityinfosolutions"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {//from   w  ww  . j av  a2 s  . c  om

        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(texto.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        Md5Crypt.md5Crypt(keyBytes);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);

        base64EncryptedString = new String(base64Bytes);

    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

From source file:BD.Encriptador.java

public static String Encriptar(String texto) {

    String secretKey = "qualityinfosolutions"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {/*from  w w w.ja v a  2 s. c  o  m*/

        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);

    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

From source file:com.ro.ssc.app.client.licensing.TrialKeyValidator.java

public static String decodeKey(String encodedEncrypted) {
    String decoded = "";
    try {/*from  w w  w  .j av a2  s  .c om*/
        byte[] saltDecrypt = SALT_DECRYPT.getBytes(StandardCharsets.UTF_8);
        SecretKeyFactory factoryKeyDecrypt = SecretKeyFactory.getInstance(SECRET_KEY_FACTORY);
        SecretKey tmp2 = factoryKeyDecrypt.generateSecret(
                new PBEKeySpec(PASS_DECRYPT.toCharArray(), saltDecrypt, ITERATIONS_DECRYPT, KEY_LENGTH));
        SecretKeySpec decryptKey = new SecretKeySpec(tmp2.getEncoded(), ALGORITHM);
        Cipher aesCipherDecrypt = Cipher.getInstance(CIPHER);
        aesCipherDecrypt.init(Cipher.DECRYPT_MODE, decryptKey);
        byte[] e64bytes = StringUtils.getBytesUtf8(encodedEncrypted);
        byte[] eBytes = Base64.decodeBase64(e64bytes);
        byte[] cipherDecode = aesCipherDecrypt.doFinal(eBytes);
        decoded = StringUtils.newStringUtf8(cipherDecode);
    } catch (Exception e) {
        LOGGER.error("Error while decoding the trial key", e);
    }
    return decoded;
}