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:Main.java

public static void main(String[] args) throws Exception {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(baos);

    MessageDigest md = MessageDigest.getInstance("MD5");
    SomeObject testObject = new SomeObject();

    dos.writeInt(testObject.count);//from   w w  w.  j a  v  a  2  s.c  om
    dos.writeLong(testObject.product);
    dos.writeDouble(testObject.stdDev);
    dos.writeUTF(testObject.name);
    dos.writeChar(testObject.delimiter);
    dos.flush();

    byte[] hashBytes = md.digest(baos.toByteArray());
    BigInteger testObjectHash = new BigInteger(hashBytes);

    System.out.println("Hash " + testObjectHash);

    dos.close();

}

From source file:md5.demo.MD5Demo.java

public static void main(String[] args) {
    String input = "123456";
    try {/*w  ww.ja v  a 2 s.  co  m*/
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        byte[] output = messageDigest.digest(input.getBytes());
        String outString = Hex.encodeHexString(output);
        System.out.println(outString);

    } catch (NoSuchAlgorithmException ex) {
        ex.printStackTrace();
    }

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    System.out.println("input     : " + new String(input));
    MessageDigest hash = MessageDigest.getInstance("SHA1");

    ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(input);
    DigestInputStream digestInputStream = new DigestInputStream(byteArrayInputStream, hash);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    int ch;//from  w  ww.  java  2s. c o m
    while ((ch = digestInputStream.read()) >= 0) {
        byteArrayOutputStream.write(ch);
    }

    byte[] newInput = byteArrayOutputStream.toByteArray();
    System.out.println("in digest : " + new String(digestInputStream.getMessageDigest().digest()));

    byteArrayOutputStream = new ByteArrayOutputStream();
    DigestOutputStream digestOutputStream = new DigestOutputStream(byteArrayOutputStream, hash);
    digestOutputStream.write(newInput);
    digestOutputStream.close();

    System.out.println("out digest: " + new String(digestOutputStream.getMessageDigest().digest()));
}

From source file:core.Hash.java

/**
 * @param args the command line arguments
 *///  w  w w.ja  v  a  2  s .  c o  m
public static void main(String[] args) {

    MessageDigest md = null;
    String password = "password D:";
    try {

        //SHA-512
        md = MessageDigest.getInstance("SHA-512");
        md.update(password.getBytes());
        byte[] mb = md.digest();
        System.out.println(Hex.encodeHex(mb));
        //SHA-1
        md = MessageDigest.getInstance("SHA-1");
        md.update(password.getBytes());
        mb = md.digest();
        System.out.println(Hex.encodeHex(mb));
        //MD5
        md = MessageDigest.getInstance("MD5");
        md.update(password.getBytes());
        mb = md.digest();
        System.out.println(Hex.encodeHex(mb));

    } catch (NoSuchAlgorithmException e) {
        //Error
    }
}

From source file:algoritmorsa_md5.MD5.java

/**
 * @param args the command line arguments
 *//*from  w w w .  jav  a  2  s.co  m*/
public static void main(String[] args) throws NoSuchAlgorithmException {
    // TODO code application logic here

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

    for (byte b : digest) {
        System.out.println(Integer.toHexString(0xFF & b));
    }
    System.out.println();
    byte[] encoded = Base64.encodeBase64(digest);
    System.out.println(new String(encoded));
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    FileInputStream fis = new FileInputStream("test");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Object o = ois.readObject();/*from  w  ww.j  a v  a  2s  .  c  om*/
    if (!(o instanceof String)) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    String data = (String) o;
    System.out.println("Got message " + data);
    o = ois.readObject();
    if (!(o instanceof byte[])) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    byte origDigest[] = (byte[]) o;
    MessageDigest md = MessageDigest.getInstance("SHA");
    md.update(data.getBytes());
    if (MessageDigest.isEqual(md.digest(), origDigest))
        System.out.println("Message is valid");
    else
        System.out.println("Message was corrupted");
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    FileInputStream fis = new FileInputStream("test");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Object o = ois.readObject();//  w w w  .  j  a va 2s  .  com
    if (!(o instanceof String)) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    String data = (String) o;
    System.out.println("Got message " + data);
    o = ois.readObject();
    if (!(o instanceof byte[])) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    byte origDigest[] = (byte[]) o;
    byte pass[] = "aaa".getBytes();
    byte buf[] = data.getBytes();
    MessageDigest md = MessageDigest.getInstance("SHA");
    md.update(pass);
    md.update(buf);
    byte digest1[] = md.digest();
    md.update(pass);
    md.update(digest1);
    System.out.println(MessageDigest.isEqual(md.digest(), origDigest));
}

From source file:MainClass.java

public static void main(String args[]) {
    MessageDigest algorithm = null;
    Security.addProvider(new MyProvider());
    try {// ww  w.  ja v a 2 s  .c  o m
        algorithm = MessageDigest.getInstance("CRC32");
    } catch (NoSuchAlgorithmException e) {
        System.err.println("Invalid algorithm");
        System.exit(-1);
    }
    int argsLength = args.length;
    for (int i = 0; i < argsLength; i++) {
        String digest = computeDigest(algorithm, args[i]);
        System.out.println(args[i] + " : " + digest);

    }
}

From source file:com.daon.identityx.utils.GenerateAndroidFacet.java

public static void main(String[] args) {

    String androidKeystoreLocation = System.getProperty("ANDROID_KEYSTORE_LOCATION",
            DEFAULT_ANDROID_KEYSTORE_LOCATION);
    String androidKeystorePassword = System.getProperty("ANDROID_KEYSTORE_PASSWORD",
            DEFAULT_ANDROID_KEYSTORE_PASSWORD);
    String androidKeystoreCert = System.getProperty("ANDROID_KEYSTORE_CERT_NAME",
            DEFAULT_ANDROID_KEYSTORE_CERT_NAME);
    String hashingAlgorithm = System.getProperty("HASHING_ALGORITHM", DEFAULT_HASHING_ALGORITHM);

    try {/*from  w  w  w. j ava2s  . c  o  m*/
        KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
        File filePath = new File(androidKeystoreLocation);
        if (!filePath.exists()) {
            System.err.println(
                    "The filepath to the debug keystore could not be located at: " + androidKeystoreCert);
            System.exit(1);
        } else {
            System.out.println("Found the Android Studio keystore at: " + androidKeystoreLocation);
        }

        keyStore.load(new FileInputStream(filePath), androidKeystorePassword.toCharArray());
        System.out.println("Keystore loaded - password and location were OK");

        Certificate cert = keyStore.getCertificate(androidKeystoreCert);
        if (cert == null) {
            System.err.println(
                    "Could not location the certification in the store with the name: " + androidKeystoreCert);
            System.exit(1);
        } else {
            System.out.println("Certificate found in the store with name: " + androidKeystoreCert);
        }

        byte[] certBytes = cert.getEncoded();

        MessageDigest digest = MessageDigest.getInstance(hashingAlgorithm);
        System.out.println("Hashing algorithm: " + hashingAlgorithm + " found.");
        byte[] hashedCert = digest.digest(certBytes);
        String base64HashedCert = Base64.getEncoder().encodeToString(hashedCert);
        System.out.println("Base64 encoded SHA-1 hash of the certificate: " + base64HashedCert);
        String base64HashedCertRemoveTrailing = StringUtils.deleteAny(base64HashedCert, "=");
        System.out.println(
                "Add the following facet to the Facets file in order for the debug app to be trusted by the FIDO client");
        System.out.println("\"android:apk-key-hash:" + base64HashedCertRemoveTrailing + "\"");

    } catch (Throwable ex) {
        ex.printStackTrace();
    }

}

From source file:com.glaf.core.security.DigestUtil.java

public static void main(String[] args) throws Exception {
    MessageDigest md5 = MessageDigest.getInstance("MD5");
    md5.update("111111".getBytes());
}