Example usage for javax.crypto.spec SecretKeySpec SecretKeySpec

Introduction

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

Prototype

public SecretKeySpec(byte[] key, String algorithm)

Source Link

Document

Constructs a secret key from the given byte array.

Usage

From source file:Main.java

public static byte[] encrypt2(byte[] data, String key) throws Exception {
    try {/*from w  w w .j a v a  2  s .  c om*/
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        byte[] base64Key = Base64.decode(key, Base64.DEFAULT);
        SecretKeySpec keyspec = new SecretKeySpec(base64Key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, keyspec);
        byte[] encrypted = cipher.doFinal(data);
        return encrypted;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

public static byte[] desEncrypt(byte[] data, String key) throws Exception {
    try {//from   w  w  w  .  j av a2  s  .  c om
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        byte[] base64Key = Base64.decode(key, Base64.DEFAULT);
        SecretKeySpec keyspec = new SecretKeySpec(base64Key, "AES");
        cipher.init(Cipher.DECRYPT_MODE, keyspec);
        byte[] original = cipher.doFinal(data);
        return original;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

private static void derivePKCS5S2Helper(Mac hMac, byte[] P, byte[] S, int c, byte[] iBuf, byte[] out,
        int outOff) throws GeneralSecurityException {
    byte[] state = new byte[hMac.getMacLength()];
    SecretKeySpec param = new SecretKeySpec(P, "SHA1");
    hMac.init(param);//from   w w w.ja v  a 2  s .co  m
    if (S != null) {
        hMac.update(S, 0, S.length);
    }
    hMac.update(iBuf, 0, iBuf.length);
    hMac.doFinal(state, 0);
    System.arraycopy(state, 0, out, outOff, state.length);
    if (c == 0) {
        throw new IllegalArgumentException("iteration count must be at least 1.");
    }
    for (int count = 1; count < c; count++) {
        hMac.init(param);
        hMac.update(state, 0, state.length);
        hMac.doFinal(state, 0);
        for (int j = 0; j != state.length; j++) {
            out[outOff + j] ^= state[j];
        }
    }
}

From source file:Main.java

private static String computeSignature(String baseString, String keyString)
        throws GeneralSecurityException, UnsupportedEncodingException {
    Mac mac = Mac.getInstance("HmacSHA256");
    SecretKeySpec secret = new SecretKeySpec(keyString.getBytes("UTF-8"), "HmacSHA256");
    mac.init(secret);//from  w ww .  ja v a 2 s.  c o  m
    byte[] byteData = mac.doFinal(baseString.getBytes("UTF-8"));

    BigInteger hash = new BigInteger(1, byteData);
    String hmac = hash.toString(16);

    if (hmac.length() % 2 != 0) {
        hmac = "0" + hmac;
    }

    return hmac;
}

From source file:Main.java

public static String computeHmacSha1(String value, String keyString) throws InvalidKeyException,
        IllegalStateException, UnsupportedEncodingException, NoSuchAlgorithmException {
    SecretKeySpec key = new SecretKeySpec((keyString).getBytes("UTF-8"), "HmacSHA1");
    Mac mac = Mac.getInstance("HmacSHA1");
    mac.init(key);/*  w ww.java2  s  .  c  o m*/

    byte[] bytes = mac.doFinal(value.getBytes("UTF-8"));

    return convToHex(bytes);
}

From source file:Main.java

public static byte[] decodeFile(byte[] key, byte[] fileData, boolean isPlainText) throws Exception {
    byte[] decrypted;
    if (!isPlainText) {
        decrypted = new byte[fileData.length - key.length * 2];
        System.arraycopy(fileData, key.length, decrypted, 0, decrypted.length);
    } else {/* www .j  a v a2  s.  c  om*/
        SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);

        decrypted = cipher.doFinal(fileData);
    }
    return decrypted;
}

From source file:Main.java

public static String createHMACWithMD5(String source, String key)
        throws NoSuchAlgorithmException, InvalidKeyException {
    Mac hmac = Mac.getInstance("HmacMD5");
    SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), hmac.getAlgorithm());
    hmac.init(secretKey);//from  w  w w.  j  a  v  a 2s  . c om

    byte[] signature = hmac.doFinal(source.getBytes());
    return Base64.encodeToString(signature, Base64.DEFAULT);
}

From source file:Main.java

public static byte[] TriDesDecryption(byte[] byteKey, byte[] dec) {
    try {//w w w.  ja  va 2 s. c  o  m
        byte[] en_key = new byte[24];
        if (byteKey.length == 16) {
            System.arraycopy(byteKey, 0, en_key, 0, 16);
            System.arraycopy(byteKey, 0, en_key, 16, 8);
        }
        SecretKey key = new SecretKeySpec(en_key, "DESede");
        Cipher dcipher = Cipher.getInstance("DESede/ECB/NoPadding");
        dcipher.init(Cipher.DECRYPT_MODE, key);

        byte[] de_b = dcipher.doFinal(dec);

        return de_b;
    } catch (Exception e) {
        e.printStackTrace();

    }
    return null;
}

From source file:Main.java

public static byte[] decrypt(byte[] ivBytes, byte[] keyBytes, byte[] textBytes) {
    try {/*from w w w  .ja  v a  2 s  .c om*/
        AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
        SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, newKey, ivSpec);
        return cipher.doFinal(textBytes);
    } catch (Exception e) {
        return errorbyte;
    }
}

From source file:Main.java

/**
 * function decrypt the string and return the result
 * @param stringToDecrypt the string against which the decryption to be performed
 * @return the decrypted String//from www.j av a2s . c  o  m
 */
public static final String decrypt(String stringToDecrypt) {
    try {
        Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, aesKey);
        return new String(cipher.doFinal(stringToDecrypt.getBytes()));
    } catch (Exception e) {

    }
    return null;
}