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

public static String generateShortUuid() {
    UUID uuid = UUID.randomUUID();
    MessageDigest md = null;//w ww.  ja v a  2s .co m
    try {
        md = MessageDigest.getInstance("SHA-256");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        return uuid.toString();
    }

    md.update(uuid.toString().getBytes());
    byte[] digest = md.digest();

    return Base64.encodeToString(digest, Base64.URL_SAFE | Base64.NO_WRAP | Base64.NO_PADDING).substring(0, 20);
}

From source file:Main.java

public static String getMD5Value(String value) {
    byte[] hash;/*from w ww .  jav a2s  .co m*/
    try {
        hash = MessageDigest.getInstance(MD5).digest(value.getBytes(UTF8));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("Huh, MD5 should be supported?", e);
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException("Huh, UTF-8 should be supported?", e);
    }
    StringBuilder hex = new StringBuilder(hash.length * 2);
    for (byte b : hash) {
        if ((b & 0xFF) < 0x10)
            hex.append("0");
        hex.append(Integer.toHexString(b & 0xFF));
    }
    return hex.toString();
}

From source file:Main.java

public static String hexSHA1(String value) {
    try {/*  w w  w  . j  av  a 2s.co  m*/
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        md.update(value.getBytes("utf-8"));
        byte[] digest = md.digest();
        return byteToHexString(digest);
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
}

From source file:Main.java

public static String md5One(String s) {
    MessageDigest md = null;/* ww w  . j  av a 2 s.c o  m*/
    try {
        md = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e.getMessage());
    }
    md.update(s.getBytes());
    return byteArrayToHexString(md.digest());
}

From source file:Main.java

private static String hashAlgorithm(String hash, String text)
        throws NoSuchAlgorithmException, UnsupportedEncodingException {
    MessageDigest md = MessageDigest.getInstance(hash);
    md.update(text.getBytes("iso-8859-1"), 0, text.length());

    return convertToHex(md.digest());
}

From source file:Main.java

public static String sha1(String str) {
    if (str == null || str.length() == 0) {
        return null;
    }/*from   w w  w . ja v  a 2  s . co m*/

    char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

    try {
        MessageDigest mdTemp = MessageDigest.getInstance("SHA1");
        mdTemp.update(str.getBytes());

        byte[] md = mdTemp.digest();
        int j = md.length;
        char buf[] = new char[j * 2];
        int k = 0;
        for (int i = 0; i < j; i++) {
            byte byte0 = md[i];
            buf[k++] = hexDigits[byte0 >>> 4 & 0xf];
            buf[k++] = hexDigits[byte0 & 0xf];
        }
        return new String(buf);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

/**
 * Converts a java.lang.String in to a MD5 hashed String
 * @param source the source String//from   www. j  a v  a  2s .  c o  m
 * @return the MD5 hashed version of the string
 */
public static String md5(String source) {
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] bytes = md.digest(source.getBytes());
        return getString(bytes);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static String sha1Hash(String text) {
    String hash = null;//  ww  w. j  a v  a  2s  .c o  m
    try {
        final MessageDigest digest = MessageDigest.getInstance("SHA-1");
        final byte[] bytes = text.getBytes("UTF-8");
        digest.update(bytes, 0, bytes.length);
        hash = convertToHex(digest.digest());
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return hash;
}

From source file:Main.java

/**
 * Converts a java.lang.String in to a SHA hashed String
 * @param source the source String//from ww w . ja v a 2 s.  co  m
 * @return the MD5 hashed version of the string
 */
public static String sha(String source) {
    try {
        MessageDigest md = MessageDigest.getInstance("SHA");
        byte[] bytes = md.digest(source.getBytes());
        return getString(bytes);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

public static byte[] calculateMd5(byte[] binaryData) {
    MessageDigest messageDigest = null;
    try {/*ww  w .  j a  v  a 2 s .  co m*/
        messageDigest = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("MD5 algorithm not found.");
    }
    messageDigest.update(binaryData);
    return messageDigest.digest();

}