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 final String encryptMd5String(String s) {
    try {/* w  w w.ja va2  s . c  o m*/
        byte[] btInput = s.getBytes();
        MessageDigest mdInst = MessageDigest.getInstance("MD5");
        mdInst.update(btInput);
        byte[] md = mdInst.digest();
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < md.length; i++) {
            int val = ((int) md[i]) & 0xff;
            if (val < 16) {
                sb.append("0");
            }
            sb.append(Integer.toHexString(val));
        }
        return sb.toString();
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static String cryptoStr2SHA1(String str) {
    try {//from  w  w w  .  ja va 2 s.  c  o m
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        md.update(str.getBytes());
        byte[] bytes = md.digest();
        return byte2Hex(bytes);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

public final static String Md5(String s) {
    char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
    try {/*ww w . j  ava2 s  . com*/
        byte[] strTemp = s.getBytes("UTF-8");
        MessageDigest mdTemp = MessageDigest.getInstance("MD5");
        mdTemp.update(strTemp);
        byte[] md = mdTemp.digest();
        int j = md.length;
        char str[] = new char[j * 2];
        int k = 0;
        for (int i = 0; i < j; i++) {
            byte byte0 = md[i];
            str[k++] = hexDigits[byte0 >>> 4 & 0xf];
            str[k++] = hexDigits[byte0 & 0xf];
        }
        return new String(str);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

/**
 * Generate the SHA1 hash of a message //w w w.  j  a  va2s  . c  o  m
 * @param message
 * @return
 * @throws NoSuchAlgorithmException
 * @throws UnsupportedEncodingException
 */
public static byte[] SHA1(byte[] message) throws NoSuchAlgorithmException, UnsupportedEncodingException {
    MessageDigest md;
    md = MessageDigest.getInstance("SHA-1");
    md.update(message);
    return md.digest();
}

From source file:Main.java

public static String md5(String str) {
    try {//w  ww.  java 2s .  co m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(str.getBytes());

        byte[] b = md.digest();
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < b.length; i++) {
            int v = (int) b[i];
            v = v < 0 ? 0x100 + v : v;
            String cc = Integer.toHexString(v);
            if (cc.length() == 1)
                sb.append('0');
            sb.append(cc);
        }

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

From source file:Main.java

public static byte[] encryptMD5File(File file) {
    FileInputStream in = null;//from   w  ww .  ja va 2 s  . c o  m
    try {
        in = new FileInputStream(file);
        FileChannel channel = in.getChannel();
        MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(buffer);
        return md.digest();
    } catch (NoSuchAlgorithmException | IOException e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException ignored) {
            }
        }
    }
    return null;
}

From source file:Main.java

public static String MD5(String s) {
    try {// w  ww  .jav  a2  s. c o m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(s.getBytes());
        byte b[] = md.digest();
        int i;
        StringBuilder buf = new StringBuilder("");
        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));
        }
        return buf.toString();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return "null";
}

From source file:Main.java

public static String md5String(String val) {
    if (val == null)
        return null;
    byte[] resBytes;
    try {/* www. j a va2s  .c o m*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(val.getBytes("UTF-8"));
        resBytes = md.digest();
        return hexString(resBytes);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

private static StringBuffer getMd5Buffer(String text) {
    StringBuffer buf = new StringBuffer();
    try {//  w w  w.  j  av a 2  s  .co  m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(text.getBytes());
        byte[] b = md.digest();
        int i;
        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));
        }
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return buf;
}

From source file:MD5.java

/**
 * MD5 BASE64 checksum for the specified input string.
 * //w  ww .j a  v a2  s . c  o  m
 * @param input -
 *          Specified input string
 * @return String - MD5 BASE64 sum
 */
public static String checkMD5(String input) {
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(input.getBytes());
        byte[] enc = md.digest();
        String md5Sum = new sun.misc.BASE64Encoder().encode(enc);
        return md5Sum;
    } catch (NoSuchAlgorithmException nsae) {
        System.out.println(nsae.getMessage());
        return null;
    }
}