Example usage for javax.crypto Mac doFinal

Introduction

In this page you can find the example usage for javax.crypto Mac doFinal.

Prototype

public final byte[] doFinal() throws IllegalStateException 

Source Link

Document

Finishes the MAC operation.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    SecretKeySpec k = new SecretKeySpec("1234".getBytes(), "HMACSHA1");
    Mac m = Mac.getInstance("HmacMD5");
    m.init(k);/* www.  j a  v  a2s  . c  o m*/
    m.update("test".getBytes("UTF8"));
    byte s[] = m.doFinal();
    for (int i = 0; i < s.length; i++) {
        System.out.print(Integer.toHexString((0x000000ff & s[i]) | 0xffffff00).substring(6));
    }
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {

    SecureRandom random = new SecureRandom();
    byte[] keyBytes = new byte[20];
    random.nextBytes(keyBytes);//from   w  w w  .  ja v a2  s .  co  m
    SecretKeySpec key = new SecretKeySpec(keyBytes, "HMACSHA1");

    System.out.println("Key:" + new BASE64Encoder().encode(key.getEncoded()));

    Mac mac = Mac.getInstance("HmacSHA1");
    mac.init(key);

    mac.update("test".getBytes("UTF8"));
    byte[] result = mac.doFinal();

    System.out.println("MAC: " + new BASE64Encoder().encode(result));
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String alg = "HmacMD5";
    Mac mac = Mac.getInstance(alg);
    KeyGenerator kg = KeyGenerator.getInstance(alg);
    SecretKey key = kg.generateKey();
    mac.init(key);//from ww  w  .j  a v a2s.c  om
    mac.update("test".getBytes());
    byte[] b = mac.doFinal();
    System.out.println(new String(b));

}

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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());

    SecureRandom random = new SecureRandom();
    IvParameterSpec ivSpec = createCtrIvForAES();
    Key key = createKeyForAES(256, random);
    Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
    String input = "12345678";
    Mac mac = Mac.getInstance("DES", "BC");
    byte[] macKeyBytes = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
    Key macKey = new SecretKeySpec(macKeyBytes, "DES");

    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 ww  w  .  j a v  a 2 s .com*/
    mac.update(input.getBytes());

    ctLength += cipher.doFinal(mac.doFinal(), 0, mac.getMacLength(), cipherText, ctLength);

    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));

}

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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   ww w  .  j  a  va 2 s.  co  m*/
    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));
}

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From source file:com.cloud.utils.EncryptionUtil.java

public static String generateSignature(String data, String key) {
    try {/*from w w w .j  a  v  a2  s. c o m*/
        final Mac mac = Mac.getInstance("HmacSHA1");
        final SecretKeySpec keySpec = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA1");
        mac.init(keySpec);
        mac.update(data.getBytes("UTF-8"));
        final byte[] encryptedBytes = mac.doFinal();
        return Base64.encodeBase64String(encryptedBytes);
    } catch (NoSuchAlgorithmException | InvalidKeyException | UnsupportedEncodingException e) {
        s_logger.error("exception occurred which encoding the data." + e.getMessage());
        throw new CloudRuntimeException("unable to generate signature", e);
    }
}

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From source file:com.cloud.sample.UserCloudAPIExecutor.java

/**
 * 1. Signs a string with a secret key using SHA-1 2. Base64 encode the result 3. URL encode the final result
 * /* ww w .ja  v  a  2 s . c  o  m*/
 * @param request
 * @param key
 * @return
 */
public static String signRequest(String request, String key) {
    try {
        Mac mac = Mac.getInstance("HmacSHA1");
        SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "HmacSHA1");
        mac.init(keySpec);
        mac.update(request.getBytes());
        byte[] encryptedBytes = mac.doFinal();
        return URLEncoder.encode(Base64.encodeBase64String(encryptedBytes), "UTF-8");
    } catch (Exception ex) {
        System.out.println(ex);
    }
    return null;
}

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From source file:ch.cyberduck.core.sftp.openssh.OpenSSHHostKeyVerifier.java

private static byte[] hmacSha1Hash(byte[] salt, String hostname) throws IOException {
    try {/* w  w w .  ja  v  a  2  s . c  om*/
        final Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(new SecretKeySpec(salt, 0, salt.length, mac.getAlgorithm()));
        mac.update(hostname.getBytes());
        return mac.doFinal();
    } catch (GeneralSecurityException e) {
        throw new IOException(e);
    }
}

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From source file:org.identityconnectors.office365.jsontoken.JWTTokenHelper.java

/**
 * Sign the text with the symmetric key.
 * @param signingKey The Signing Key./* w  ww.  j av  a 2s  . c o  m*/
 * @param rawToken The rawToken that needs to be signed.
 * @return Signed byte array.
 * @throws SampleAppException
 */
private static byte[] signData(String signingKey, String rawToken) throws Exception {
    SecretKeySpec secretKey = null;

    secretKey = new SecretKeySpec(com.sun.org.apache.xerces.internal.impl.dv.util.Base64.decode(signingKey),
            "HmacSHA256");

    Mac mac;
    byte[] signedData = null;

    mac = Mac.getInstance("HmacSHA256");
    mac.init(secretKey);
    mac.update(rawToken.getBytes("UTF-8"));
    signedData = mac.doFinal();

    return signedData;
}

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From source file:org.apache.shindig.common.crypto.Crypto.java

/**
 * HMAC sha1//from   w  w w. j a va  2s .c om
 * 
 * @param key the key must be at least 8 bytes in length.
 * @param in byte array to HMAC.
 * @return the hash
 * 
 * @throws GeneralSecurityException
 */
public static byte[] hmacSha1(byte[] key, byte[] in) throws GeneralSecurityException {
    if (key.length < MIN_HMAC_KEY_LEN) {
        throw new GeneralSecurityException("HMAC key should be at least " + MIN_HMAC_KEY_LEN + " bytes.");
    }
    Mac hmac = Mac.getInstance(HMAC_TYPE);
    Key hmacKey = new SecretKeySpec(key, HMAC_TYPE);
    hmac.init(hmacKey);
    hmac.update(in);
    return hmac.doFinal();
}

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