Example usage for java.security MessageDigest getInstance

List of usage examples for java.security MessageDigest getInstance

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Introduction

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

Prototype

public static MessageDigest getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a MessageDigest object that implements the specified digest algorithm.

Usage

From source file:net.sf.jml.util.DigestUtils.java

public static byte[] md5(byte[] b) {
    try {//from   ww  w  . j  a v a 2s  .  c o m
        MessageDigest digest = MessageDigest.getInstance("MD5");
        return digest.digest(b);
    } catch (NoSuchAlgorithmException e) {
        log.error(e, e);
        return null;
    }
}

From source file:com.zen.androidhtmleditor.util.TextUtil.java

public static String MD5(String str, String encoding) {
    MessageDigest messageDigest = null;

    try {//from   www.  jav a 2s  .co m
        messageDigest = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    messageDigest.reset();
    try {
        messageDigest.update(str.getBytes(encoding));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    byte[] byteArray = messageDigest.digest();

    StringBuffer md5StrBuff = new StringBuffer();

    for (int i = 0; i < byteArray.length; i++) {
        if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
            md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
        else
            md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
    }

    return md5StrBuff.toString();
}

From source file:com.sammyun.util.MD5.java

/**
 * @param str// ww  w.j ava2 s  .com
 * @return
 * @throws NoSuchAlgorithmException
 */
public static String crypt(String str) throws NoSuchAlgorithmException {
    if (str == null || str.length() == 0) {
        throw new IllegalArgumentException("String to encript cannot be null or zero length");
    }

    StringBuffer hexString = new StringBuffer();

    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update(str.getBytes());
    byte[] hash = md.digest();

    for (byte aHash : hash) {
        if ((OXFF & aHash) < OX10) {
            hexString.append("0").append(Integer.toHexString((OXFF & aHash)));
        } else {
            hexString.append(Integer.toHexString(OXFF & aHash));
        }
    }

    return hexString.toString();
}

From source file:Main.java

private static String digest(final String value) {
    byte[] digested;
    try {//from w w  w. j av  a  2 s  . c om
        digested = MessageDigest.getInstance(HASH_ALGORITHM).digest(value.getBytes(CHARSET));
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (UnsupportedEncodingException e) {
        return null;
    }

    String hashed = new BigInteger(1, digested).toString(16);
    int padding = HASH_LENGTH - hashed.length();
    if (padding == 0)
        return hashed;

    char[] zeros = new char[padding];
    Arrays.fill(zeros, '0');
    return new StringBuilder(HASH_LENGTH).append(zeros).append(hashed).toString();
}

From source file:Main.java

/** Returns a 32 character string containing a hash of {@code s}. */
public static String hash(String s) {
    try {// w w  w . jav a2  s.  c o m
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        byte[] md5bytes = messageDigest.digest(s.getBytes("UTF-8"));
        return bytesToHexString(md5bytes);
    } catch (NoSuchAlgorithmException e) {
        throw new AssertionError(e);
    } catch (UnsupportedEncodingException e) {
        throw new AssertionError(e);
    }
}

From source file:Main.java

/**
 * A double check about app signature that was passed by MainActivity as facetID.
 * @param facetId a string value composed by app hash. I.e. android:apk-key-hash:Lir5oIjf552K/XN4bTul0VS3GfM
 * @param context Application Context/*from w w  w  . j  a  va2s  . co m*/
 * @return true if the signature executed on runtime matches if signature sent by MainActivity
 */
private static boolean checkAppSignature(String facetId, Context context) {
    try {
        PackageInfo packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(),
                PackageManager.GET_SIGNATURES);
        for (Signature sign : packageInfo.signatures) {
            byte[] sB = sign.toByteArray();
            MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
            messageDigest.update(sign.toByteArray());
            String currentSignature = Base64.encodeToString(messageDigest.digest(), Base64.DEFAULT);
            if (currentSignature.toLowerCase().contains(facetId.split(":")[2].toLowerCase())) {
                return true;
            }
        }
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return false;
}

From source file:com.algodefu.yeti.md5.MD5HashGenerator.java

public static String generateKeyByObject(Object object) {
    MessageDigest m = null;/*from   www  .  j  a va  2  s . c  o m*/
    try {
        m = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    m.reset();
    //m.update(objectToByteArray(object));
    m.update(SerializationUtils.serialize((Serializable) object));
    byte[] digest = m.digest();
    BigInteger bigInt = new BigInteger(1, digest);
    String hashtext = bigInt.toString(16);
    while (hashtext.length() < 32) {
        hashtext = "0" + hashtext;
    }
    return hashtext;
}

From source file:Main.java

public static String getApkSignatureMD5String(Signature signature) {
    MessageDigest md;//from ww w.  j  ava 2 s  .c o m
    try {
        md = MessageDigest.getInstance("MD5");

        md.update(signature.toByteArray());

        byte[] digest = md.digest();

        return toHexString(digest);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return "";
}

From source file:Main.java

public static byte[] getFileDigest(File file, String algorithm) {
    InputStream fis = null;//www .  j a  v  a  2 s  . c  o  m
    byte[] buffer = new byte[1024];
    int numRead;
    MessageDigest md;
    try {
        fis = new FileInputStream(file);
        md = MessageDigest.getInstance(algorithm);
        while ((numRead = fis.read(buffer)) > 0) {
            md.update(buffer, 0, numRead);
        }
        fis.close();
        return md.digest();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException e) {
            }
        }
    }
    return null;
}

From source file:Main.java

public static String calcHash(File file, String algo) throws Exception {
    MessageDigest digester = MessageDigest.getInstance(algo);

    FileInputStream is = new FileInputStream(file);
    DigestInputStream dis;//from  w  w w . j  a  va 2  s.co  m
    try {
        dis = new DigestInputStream(is, digester);

        for (byte[] buffer = new byte[1024 * 4]; dis.read(buffer) >= 0;) {
            // just read it
        }
    } finally {
        is.close();
    }

    byte[] digest = digester.digest();

    StringBuffer hash = new StringBuffer(digest.length * 2);

    for (int i = 0; i < digest.length; i++) {
        int b = digest[i] & 0xFF;

        if (b < 0x10) {
            hash.append('0');
        }

        hash.append(Integer.toHexString(b));
    }

    return hash.toString();
}