Example usage for java.security MessageDigest digest

Introduction

In this page you can find the example usage for java.security MessageDigest digest.

Prototype

public byte[] digest(byte[] input) 

Source Link

Document

Performs a final update on the digest using the specified array of bytes, then completes the digest computation.

Usage

From source file:in.mtap.iincube.mongoser.codec.crypto.Psyfer.java

public static Psyfer getInstance(String secretKey) throws NoSuchAlgorithmException,
        UnsupportedEncodingException, NoSuchPaddingException, InvalidKeyException {
    MessageDigest digest = MessageDigest.getInstance("SHA-1");
    byte[] key = digest.digest(secretKey.getBytes("UTF-8"));
    key = Arrays.copyOf(key, 16);
    SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
    Cipher eCipher = Cipher.getInstance("AES");
    Cipher deCipher = Cipher.getInstance("AES");
    eCipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
    deCipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
    return new Psyfer(eCipher, deCipher);
}

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From source file:de.topicmapslab.majortom.server.http.util.MD5Util.java

/**
 * Calculates the md5 sum of the given string
 * //w  ww  .  j a  v a  2 s .c  om
 * @param source the source string used to calculate
 * @return the String representing the MD5 sum
 * @throws NoSuchAlgorithmException  if the MD5 algorithm is not available
 */
public static final String calculateMD5(String source) {
    try {
        MessageDigest digest = MessageDigest.getInstance("MD5");
        byte[] bytes = digest.digest(source.getBytes());

        final int nBytes = bytes.length;
        char[] result = new char[2 * nBytes];

        int j = 0;
        for (int i = 0; i < nBytes; i++) {
            // Char for top 4 bits
            result[j++] = HEX[(0xF0 & bytes[i]) >>> 4];
            // Bottom 4
            result[j++] = HEX[(0x0F & bytes[i])];
        }

        return new String(result);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("Could not calculate md5", e);
    }
}

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From source file:info.track_mate.util.EncryptionUtils.java

/**
 * Encrypt the specified String./*  w  w  w . ja  v a  2 s.c  om*/
 * @param toEncrypt The String to encrypt.
 * @param algorithm The algorithm to use for the encryption. See Appendix A in the
 * <a href="../../../technotes/guides/security/crypto/CryptoSpec.html#AppA">Java Cryptography Architecture API Specification &amp; Reference </a>
 * for information about standard algorithm names.
 * @param encodeAsBase64 If true then encode the output of the encryption algorithm as Base64.
 * @return The encrypted String.
 * @throws NoSuchAlgorithmException If the specified algorithm doesn't exist or is unavailable.
 */
public static String encryptString(String toEncrypt, String algorithm, boolean encodeAsBase64)
        throws NoSuchAlgorithmException {
    MessageDigest md5Digest = MessageDigest.getInstance(algorithm);
    byte[] encryptedBytes = md5Digest.digest(toEncrypt.getBytes());
    if (encodeAsBase64) {
        encryptedBytes = Base64.encodeBase64(encryptedBytes);
    }
    String encryptedString = new String(encryptedBytes);
    return encryptedString;
}

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From source file:com.eschava.forevernote.EvernoteUtil.java

public static Resource createResource(InputStream stream, String contentType) throws IOException {
    try {/*from  www . j  a v a2 s  . c  om*/
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        FileCopyUtils.copy(stream, outputStream);
        byte[] bytes = outputStream.toByteArray();

        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        byte[] hash = messageDigest.digest(bytes);

        Data data = new Data();
        data.setBody(bytes);
        data.setBodyHash(hash);

        Resource resource = new Resource();
        resource.setMime(contentType);
        resource.setData(data);

        return resource;
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e); // is not possible
    }
}

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

/**
 * Se encarga de encriptar la contrasea ingresada por el usuario *
 *///w w w.  ja  va 2 s .  c o m
public static String encrypt(String value) throws BusinessException {
    String secretKey = "e-business";
    String base64EncryptedString = "";
    try {
        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 = value.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);
    } catch (Exception ex) {
        throw new BusinessException(ex);
    }
    return base64EncryptedString;
}

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

/**
 * Se encarga de desencriptar la contrasea ingresada por el usuario *
 *//*from w  w w  .j  av a  2s . co  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;
}

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From source file:Main.java

/**
 * Returns the {@link Certificate} fingerprint as returned by <code>keytool</code>.
 *
 * @param certificate//  w ww .  j a v a2 s . co  m
 * @param hashAlgorithm
 */
public static String getFingerprint(Certificate cert, String hashAlgorithm) {
    if (cert == null) {
        return null;
    }
    try {
        MessageDigest digest = MessageDigest.getInstance(hashAlgorithm);
        return toHexadecimalString(digest.digest(cert.getEncoded()));
    } catch (NoSuchAlgorithmException e) {
        // ignore
    } catch (CertificateEncodingException e) {
        // ignore
    }
    return null;
}

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From source file:Main.java

public static String GetHash(byte[] data) {
    MessageDigest md;
    String hash = null;/*from  w w w  . j  ava 2s  .c  om*/
    try {
        md = MessageDigest.getInstance("MD5");
        hash = new BigInteger(1, md.digest(data)).toString(16);
    } catch (NoSuchAlgorithmException e) {
        Log.i("BMSUtil", "Hashing Error!");
        e.printStackTrace();
    }
    return hash;
}

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From source file:lib.clases_cripto.java

public static String Desencriptar(String textoEncriptado) throws Exception {

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

    try {/*w  w w . j  a  v a 2s .co m*/
        byte[] message = Base64.decodeBase64(textoEncriptado.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) {
    }
    return base64EncryptedString;
}

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From source file:BD.Encriptador.java

public static String Desencriptar(String textoEncriptado) throws Exception {

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

    try {//from w  w  w. j a va  2 s . c  om
        byte[] message = Base64.decodeBase64(textoEncriptado.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) {
    }
    return base64EncryptedString;
}

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