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()

Source Link

Document

Completes the hash computation by performing final operations such as padding.

Usage

From source file:Main.java

public static boolean verifyChecksum(byte[] bytesWithChecksumm) {
    try {//w  w  w  . j  a  v a  2s. c  om
        if (bytesWithChecksumm == null || bytesWithChecksumm.length < 5) {
            return false;
        }
        MessageDigest digestSha = MessageDigest.getInstance("SHA-256");
        digestSha.update(bytesWithChecksumm, 0, bytesWithChecksumm.length - 4);
        byte[] first = digestSha.digest();
        byte[] calculatedDigest = digestSha.digest(first);
        boolean checksumValid = true;
        for (int i = 0; i < 4; i++) {
            if (calculatedDigest[i] != bytesWithChecksumm[bytesWithChecksumm.length - 4 + i]) {
                checksumValid = false;
            }
        }
        return checksumValid;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

public static String getBytesDigestEncrypt(byte[] bytes, String algorithm) {
    if (algorithm.equals(MD5) || algorithm.equals(SHA1) || algorithm.equals(SHA256) || algorithm.equals(SHA384)
            || algorithm.equals(SHA512)) {
        MessageDigest digest = null;
        try {/* ww w  .  j  av  a2s  .  com*/
            digest = MessageDigest.getInstance(algorithm);
            digest.update(bytes);
            return bytes2String(digest.digest());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
    return null;
}

From source file:Main.java

public static byte[] computeSHA1(ByteBuffer convertme, int offset, int len) {
    int oldp = convertme.position();
    int oldl = convertme.limit();
    try {//  w ww.j  a  v a2s  .co  m
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        convertme.position(offset);
        convertme.limit(len);
        md.update(convertme);
        return md.digest();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        convertme.limit(oldl);
        convertme.position(oldp);
    }
    return new byte[20];
}

From source file:auguste.client.command.client.AccountCreate.java

private static String hashPassword(String password) {
    try {/*from w  ww . ja  v  a2  s  . com*/
        MessageDigest digest = MessageDigest.getInstance("SHA-1");
        digest.reset();
        digest.update(password.getBytes());
        return new String(Hex.encodeHex(digest.digest()));
    } catch (NoSuchAlgorithmException e) {
        // Algorithme indisponible
        System.out.println(e.getMessage());
        return new String();
    }
}

From source file:com.buddycloud.friendfinder.HashUtils.java

public static String encodeSHA256(String provider, String contactId)
        throws NoSuchAlgorithmException, UnsupportedEncodingException {
    MessageDigest md = MessageDigest.getInstance("SHA-256");
    md.update((provider + ":" + contactId).getBytes("UTF-8"));
    byte[] digest = md.digest();
    return Base64.encodeBase64String(digest);
}

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

/**
 * @param str// w w w.ja  v  a2  s.c  o  m
 * @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

/**
 * md5//from w  ww  . j av  a  2s .com
 * 
 * @param str
 * @return
 */
public static String md5(String str) {
    try {
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        messageDigest.reset();
        messageDigest.update(str.getBytes("UTF-8"));
        byte[] byteArray = messageDigest.digest();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < byteArray.length; i++) {
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) {
                sb.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
            } else {
                sb.append(Integer.toHexString(0xFF & byteArray[i]));
            }
        }

        return sb.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return str;
}

From source file:Main.java

public static String MD5(String paramString) {
    if (paramString == null)
        return null;
    try {/*from  w ww .j  a  v  a  2 s  .  c  o  m*/
        byte[] arrayOfByte1 = paramString.getBytes();
        MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
        localMessageDigest.reset();
        localMessageDigest.update(arrayOfByte1);
        byte[] arrayOfByte2 = localMessageDigest.digest();
        StringBuffer localStringBuffer = new StringBuffer();
        for (int i = 0; i < arrayOfByte2.length; i++) {
            Object[] arrayOfObject = new Object[1];
            arrayOfObject[0] = Byte.valueOf(arrayOfByte2[i]);
            localStringBuffer.append(String.format("%02X", arrayOfObject));
        }
        String str = localStringBuffer.toString();
        return str;
    } catch (Exception localException) {
    }
    return paramString.replaceAll("[^[a-z][A-Z][0-9][.][_]]", "");
}

From source file:Main.java

private static byte[] computeHash(String x) {
    java.security.MessageDigest d = null;
    try {//from   w w w .j a va  2  s .  c  o m
        d = java.security.MessageDigest.getInstance("SHA-1");
        d.reset();
        d.update(x.getBytes());
        return d.digest();
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return null;
    }

}

From source file:Main.java

public static boolean verifyChecksum(byte[] bytesWithChecksumm) {
    try {/*from  w ww . j a  v  a2s . c  om*/
        if (bytesWithChecksumm == null || bytesWithChecksumm.length < 5) {
            return false;
        }
        MessageDigest digestSha = MessageDigest.getInstance("SHA-256");
        digestSha.update(bytesWithChecksumm, 0, bytesWithChecksumm.length - 4);
        byte[] first = digestSha.digest();
        byte[] calculatedDigest = digestSha.digest(first);
        boolean checksumValid = true;
        for (int i = 0; i < 4; i++) {
            if (calculatedDigest[i] != bytesWithChecksumm[bytesWithChecksumm.length - 4 + i]) {
                checksumValid = false;
            }
        }
        return checksumValid;
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}