// serverCodings.java
// -----------------------
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
// last major change: 29.04.2004
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.
package de.anomic.server;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.security.MessageDigest;
import java.util.Properties;
import java.util.HashMap;
import java.util.StringTokenizer;
public final class serverCodings {
public static String encodeHex(long in, int length) {
String s = Long.toHexString(in);
while (s.length() < length) s = "0" + s;
return s;
}
public static String encodeHex(byte[] in) {
if (in == null) return "";
String result = "";
for (int i = 0; i < in.length; i++)
result = result + (((0Xff & (int) in[i]) < 16) ? "0" : "") + Integer.toHexString(0Xff & (int) in[i]);
return result;
}
public static byte[] decodeHex(String hex) {
byte[] result = new byte[hex.length() / 2];
for (int i = 0; i < result.length; i++) {
result[i] = (byte) (16 * Integer.parseInt(hex.charAt(i * 2) + "", 16) + Integer.parseInt(hex.charAt(i * 2 + 1) + "", 16));
}
return result;
}
public static String encodeMD5Hex(String key) {
// generate a hex representation from the md5 of a string
return encodeHex(encodeMD5Raw(key));
}
public static String encodeMD5Hex(File file) {
// generate a hex representation from the md5 of a file
return encodeHex(encodeMD5Raw(file));
}
public static String encodeMD5Hex(byte[] b) {
// generate a hex representation from the md5 of a byte-array
return encodeHex(encodeMD5Raw(b));
}
public static byte[] encodeMD5Raw(String key) {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
digest.reset();
digest.update(key.getBytes());
return digest.digest();
} catch (java.security.NoSuchAlgorithmException e) {
System.out.println("Internal Error at md5:" + e.getMessage());
}
return null;
}
public static byte[] encodeMD5Raw(File file) {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
digest.reset();
InputStream in = new BufferedInputStream(new FileInputStream(file), 2048);
byte[] buf = new byte[2048];
int n;
while ((n = in.read(buf)) > 0) digest.update(buf, 0, n);
in.close();
// now compute the hex-representation of the md5 digest
return digest.digest();
} catch (java.security.NoSuchAlgorithmException e) {
System.out.println("Internal Error at md5:" + e.getMessage());
} catch (java.io.FileNotFoundException e) {
System.out.println("file not found:" + file.toString());
} catch (java.io.IOException e) {
System.out.println("file error with " + file.toString() + ": " + e.getMessage());
}
return null;
}
private static byte[] encodeMD5Raw(byte[] b) {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
digest.reset();
InputStream in = new ByteArrayInputStream(b);
byte[] buf = new byte[2048];
int n;
while ((n = in.read(buf)) > 0) digest.update(buf, 0, n);
in.close();
// now compute the hex-representation of the md5 digest
return digest.digest();
} catch (java.security.NoSuchAlgorithmException e) {
System.out.println("Internal Error at md5:" + e.getMessage());
} catch (java.io.IOException e) {
System.out.println("byte[] error: " + e.getMessage());
}
return null;
}
public static Properties s2p(String s) {
Properties p = new Properties();
int pos;
StringTokenizer st = new StringTokenizer(s, ",");
String token;
while (st.hasMoreTokens()) {
token = st.nextToken().trim();
pos = token.indexOf("=");
if (pos > 0) p.setProperty(token.substring(0, pos).trim(), token.substring(pos + 1).trim());
}
return p;
}
public static HashMap string2map(String string) {
// this can be used to parse a Map.toString() into a Map again
if (string == null) return null;
HashMap map = new HashMap();
int pos;
pos = string.indexOf("{"); if (pos >= 0) string = string.substring(pos + 1).trim();
pos = string.lastIndexOf("}"); if (pos >= 0) string = string.substring(0, pos).trim();
StringTokenizer st = new StringTokenizer(string, ",");
String token;
while (st.hasMoreTokens()) {
token = st.nextToken().trim();
pos = token.indexOf("=");
if (pos > 0) map.put(token.substring(0, pos).trim(), token.substring(pos + 1).trim());
}
return map;
}
public static void main(String[] s) {
if (s.length == 0) {
System.out.println("usage: -[ec|dc|es|ds|s2m] <arg>");
System.exit(0);
}
if (s[0].equals("-s2m")) {
// generate a b64 decoding from a given string
System.out.println(string2map(s[1]).toString());
}
}
}