org.jopendocument.util
Class MessageDigestUtils

java.lang.Object
  org.jopendocument.util.MessageDigestUtils

public class MessageDigestUtils
extends Object

Method Summary

static String	asHex(byte[] hash) Turns array of bytes into string representing each byte as unsigned hex number.
static int	bytes2int(byte[] buf) Cat 4 bytes to make an int.
static byte[]	fromHex(String hash)
static String	getHashString(MessageDigest md)
static String	getHashString(MessageDigest md, byte[] data)
static String	getHashString(MessageDigest md, InputStream ins)
static String	getHashString(String algo, byte[] data)
static MessageDigest	getMD5()
static String	getMD5(File f)
static byte[]	int2bytes(int integer) Split an int into 4 bytes.
static String	toString(byte[] hash, char[] chars)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

asHex

public static String asHex(byte[] hash)

Turns array of bytes into string representing each byte as unsigned hex number.

Parameters:

hash - Array of bytes to convert to hex-string

Returns:

Generated hex string

toString

public static String toString(byte[] hash,
                              char[] chars)

fromHex

public static byte[] fromHex(String hash)

int2bytes

public static byte[] int2bytes(int integer)

Split an int into 4 bytes.

Parameters:

integer - an int, eg -2^31, or 16.

Returns:

the 4 bytes of its two's complement, eg [0x80, 0x00, 0x00, 0x00] or [0x00, 0x00, 0x00, 0x10].

bytes2int

public static int bytes2int(byte[] buf)

Cat 4 bytes to make an int.

Parameters:

buf - an array of at least 4 bytes, eg [0x80, 0x00, 0x00, 0x03].

Returns:

the resulting int, eg -2^31 + 3 or -2147483645.

getHashString

public static String getHashString(MessageDigest md)

getHashString

public static String getHashString(String algo,
                                   byte[] data)
                            throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

getHashString

public static String getHashString(MessageDigest md,
                                   byte[] data)

getHashString

public static String getHashString(MessageDigest md,
                                   InputStream ins)
                            throws IOException

Throws:

IOException

getMD5

public static String getMD5(File f)
                     throws IOException

Throws:

IOException

getMD5

public static MessageDigest getMD5()