Example usage for java.security MessageDigest getInstance

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:Main.java

private static MessageDigest getMd5Instance() {
    try {//from  w  w w  . j a  va  2s.c  om
        return MessageDigest.getInstance("md5");
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:com.beginner.core.utils.MD5.java

public static String md5(String str) {
    try {//  ww w  . j av  a2  s.  c  o m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(str.getBytes());
        byte b[] = md.digest();

        int i;

        StringBuffer buf = new StringBuffer("");
        for (int offset = 0; offset < b.length; offset++) {
            i = b[offset];
            if (i < 0)
                i += 256;
            if (i < 16)
                buf.append("0");
            buf.append(Integer.toHexString(i));
        }
        str = buf.toString();
    } catch (Exception e) {
        e.printStackTrace();

    }
    return str;
}

From source file:Main.java

public static String hexdigest(byte[] paramArrayOfByte) {
    final char[] hexDigits = { 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102 };
    try {//from w w w. j a  va2 s .  co  m
        MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
        localMessageDigest.update(paramArrayOfByte);
        byte[] arrayOfByte = localMessageDigest.digest();
        char[] arrayOfChar = new char[32];
        for (int i = 0, j = 0;; i++, j++) {
            if (i >= 16) {
                return new String(arrayOfChar);
            }
            int k = arrayOfByte[i];
            arrayOfChar[j] = hexDigits[(0xF & k >>> 4)];
            arrayOfChar[++j] = hexDigits[(k & 0xF)];
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return "";
}

From source file:Main.java

/**
 * @param context//  www .j  a v  a  2s.c  o  m
 * @return KeyHash
 * follow facebook developers link to get release key hash
 * https://developers.facebook.com/docs/android/getting-started#release-key-hash
 */
public static String getKeyHash(Context context) {
    PackageInfo packageInfo;
    String key = null;
    try {
        packageInfo = context.getPackageManager().getPackageInfo(
                context.getApplicationContext().getPackageName(), PackageManager.GET_SIGNATURES);
        for (Signature signature : packageInfo.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
    } catch (PackageManager.NameNotFoundException e1) {
    } catch (NoSuchAlgorithmException e) {
    } catch (Exception e) {
    }
    return key;
}

From source file:Main.java

public static String sha1(String strSrc) {
    MessageDigest md = null;/*from   w ww  .j a  v  a 2s .  c o m*/
    String strDes = "";

    byte[] bt = strSrc.getBytes();
    try {
        md = MessageDigest.getInstance("SHA-1");
        md.update(bt);
        byte[] encryptStr = md.digest();
        String tmp = null;
        for (int i = 0; i < encryptStr.length; i++) {
            tmp = (Integer.toHexString(encryptStr[i] & 0xFF));
            if (tmp.length() == 1) {
                strDes += "0";
            }
            strDes += tmp;
        }
    } catch (NoSuchAlgorithmException e) {
        System.out.println("Invalid algorithm.");
        return null;
    }
    return strDes;
}

From source file:MainClass.java

static Cipher createCipher(int mode) throws Exception {
    PBEKeySpec keySpec = new PBEKeySpec("test".toCharArray());
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey key = keyFactory.generateSecret(keySpec);
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update("input".getBytes());
    byte[] digest = md.digest();
    byte[] salt = new byte[8];
    for (int i = 0; i < 8; ++i)
        salt[i] = digest[i];/*w  w w. jav a 2s . co m*/
    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);
    Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
    cipher.init(mode, key, paramSpec);
    return cipher;
}

From source file:com.barchart.netty.rest.server.util.SigningUtil.java

public static byte[] bytesToSign(final HttpServerRequest request) throws Exception {

    final ByteBuf content = request.getContent();
    content.markReaderIndex();//from  ww  w  .  jav  a2 s .c  o m
    final byte[] contentBytes = IOUtils.toByteArray(new ByteBufInputStream(content));
    content.resetReaderIndex();

    final String md5 = KerberosUtilities.bytesToHex(MessageDigest.getInstance("MD5").digest(contentBytes));

    final StringBuilder sb = new StringBuilder();
    sb.append(request.getMethod().name()).append("\n").append(request.getUri()).append("\n").append(md5)
            .append("\n").append(nullCheck(request.headers().get(HttpHeaders.Names.CONTENT_TYPE))).append("\n")
            .append(nullCheck(request.headers().get(HttpHeaders.Names.DATE))).append("\n");

    return sb.toString().getBytes("UTF-8");

}

From source file:Main.java

public static String getMD5Hash(String s) throws NoSuchAlgorithmException {
    MessageDigest m = MessageDigest.getInstance("MD5");
    byte[] data = s.getBytes();
    m.update(data, 0, data.length);// w ww . jav a 2 s .co m
    BigInteger i = new BigInteger(1, m.digest());
    return String.format("%1$032X", i);
}

From source file:MD5.java

public static String calculateMD5(File updateFile) {
    MessageDigest digest;/*w w w  .ja  v a  2  s .co m*/
    try {
        digest = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        return null;
    }
    InputStream is;
    try {
        is = new FileInputStream(updateFile);
    } catch (FileNotFoundException e) {
        return null;
    }
    byte[] buffer = new byte[8192];
    int read;
    try {
        while ((read = is.read(buffer)) > 0) {
            digest.update(buffer, 0, read);
        }
        byte[] md5sum = digest.digest();
        BigInteger bigInt = new BigInteger(1, md5sum);
        String output = bigInt.toString(16);
        // Fill to 32 chars
        output = String.format("%32s", output).replace(' ', '0');
        return output;
    } catch (IOException e) {
        throw new RuntimeException("Unable to process file for MD5", e);
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            System.out.println(e);
        }
    }
}

From source file:Main.java

public static String stringToMD5(String str) {

    try {/*  w  w w. j  a  va2  s.c  o  m*/
        byte[] strTemp = str.getBytes();
        MessageDigest mdTemp = MessageDigest.getInstance("MD5");
        mdTemp.update(strTemp);
        return toHexString(mdTemp.digest());
    } catch (Exception e) {
        return null;
    }
}