User: luke_t Date: 01/12/18 13:31:49 Added: src/main/org/jboss/security Base64Encoder.java Log: Base64Encoder utility, based on w3c implementation. Currently intended for password hashing. May be better located elsewhere eventually. Revision Changes Path 1.1 jbosssx/src/main/org/jboss/security/Base64Encoder.java Index: Base64Encoder.java =================================================================== package org.jboss.security; // for the time being ... import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintStream; import java.io.UnsupportedEncodingException; /** * BASE64 encoder implementation. * Provides encoding methods, using the BASE64 encoding rules, as defined * in the MIME specification, <a href="http://ietf.org/rfc/rfc1521.txt";>rfc1521</a>. * * * This class is a modified version based on code * obtained from the w3 consortium website, * which is subject to their generic copyright notice: * * <dl> * <dd><a href="http://www.w3.org/Consortium/Legal/";>Copyright</a> © [$date-of-software] <a * HREF="http://www.w3.org/";>World Wide Web Consortium</a>, (<a * HREF="http://www.lcs.mit.edu/";>Massachusetts Institute of Technology</a>, <a * HREF="http://www.inria.fr/";>Institut National de Recherche en Informatique et en * Automatique</a>, <a HREF="http://www.keio.ac.jp/";>Keio University</a>). All Rights * Reserved. This program is distributed under the <a * HREF="http://www.w3.org/Consortium/Legal/copyright-software-19980720.html";>W3C's Software * Intellectual Property License</a>. 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 W3C License <a * href="http://www.w3.org/Consortium/Legal/";>http://www.w3.org/Consortium/Legal/</a> for * more details. </dd> *</dl> * * */ public final class Base64Encoder { private static final int BUFFER_SIZE = 1024 ; private static final byte encoding[] = { (byte) 'A', (byte) 'B', (byte) 'C', (byte) 'D', (byte) 'E', (byte) 'F', (byte) 'G', (byte) 'H', // 0-7 (byte) 'I', (byte) 'J', (byte) 'K', (byte) 'L', (byte) 'M', (byte) 'N', (byte) 'O', (byte) 'P', // 8-15 (byte) 'Q', (byte) 'R', (byte) 'S', (byte) 'T', (byte) 'U', (byte) 'V', (byte) 'W', (byte) 'X', // 16-23 (byte) 'Y', (byte) 'Z', (byte) 'a', (byte) 'b', (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f', // 24-31 (byte) 'g', (byte) 'h', (byte) 'i', (byte) 'j', (byte) 'k', (byte) 'l', (byte) 'm', (byte) 'n', // 32-39 (byte) 'o', (byte) 'p', (byte) 'q', (byte) 'r', (byte) 's', (byte) 't', (byte) 'u', (byte) 'v', // 40-47 (byte) 'w', (byte) 'x', (byte) 'y', (byte) 'z', (byte) '0', (byte) '1', (byte) '2', (byte) '3', // 48-55 (byte) '4', (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) '+', (byte) '/', // 56-63 (byte) '=' // 64 }; /** * Encodes data from supplied input to output. * @param in The input stream to be encoded. * @param out The output stream, to write encoded data to. */ public static void encode(InputStream in, OutputStream out) throws IOException { process(in, out); } /** * Encode the supplied byte array and write the encoded * data to the OutputStream <i>out</i>. */ public static void encode(byte input[], OutputStream out) throws IOException { ByteArrayInputStream in = new ByteArrayInputStream(input); process(in, out); } /** * Encode the given string,and return the encoded version as a string. * * @return A String, representing the encoded content of the input String. */ public static String encode(String input) throws IOException { byte bytes[] ; bytes = input.getBytes("ISO-8859-1"); return encode (bytes); } /** * Encode the given byte array and return the result as a string. */ public static String encode(byte bytes[]) throws IOException { ByteArrayInputStream in = new ByteArrayInputStream(bytes); ByteArrayOutputStream out = new ByteArrayOutputStream(); process(in, out); return out.toString("ISO-8859-1"); } /** * Testing the encoder. * Run with one argument, prints the encoded version of it. * With two, the second is assumed to be the name of a MessageDigest to * be applied to the string before encoding (useful for generating * password hashes). */ public static void main (String args[]) throws Exception { if(args.length == 1) { System.out.println ("["+ Base64Encoder.encode(args[0])+"]"); // joe:eoj -> am9lOmVvag== // 12345678:87654321 -> MTIzNDU2Nzg6ODc2NTQzMjE= } else if (args.length == 2) { byte[] hash = java.security.MessageDigest.getInstance(args[1]).digest(args[0].getBytes()); System.out.println ("["+ Base64Encoder.encode(hash)+"]"); } } // Private ---------------------------------------------------------------- private static int get1(byte buf[], int off) { return (buf[off] & 0xfc) >> 2 ; } private static int get2(byte buf[], int off) { return ((buf[off]&0x3) << 4) | ((buf[off+1]&0xf0) >>> 4) ; } private static int get3(byte buf[], int off) { return ((buf[off+1] & 0x0f) << 2) | ((buf[off+2] & 0xc0) >>> 6) ; } private static int get4(byte buf[], int off) { return buf[off+2] & 0x3f ; } /** * Process the data: encode the input stream to the output stream. * This method runs through the input stream, encoding it to the output * stream. * @exception IOException If we weren't able to access the input stream or * the output stream. */ private static void process(InputStream in, OutputStream out) throws IOException { byte buffer[] = new byte[BUFFER_SIZE] ; int got = -1 ; int off = 0 ; int count = 0 ; while ((got = in.read(buffer, off, BUFFER_SIZE-off)) > 0) { if ( got >= 3 ) { got += off; off = 0; while (off + 3 <= got) { int c1 = get1(buffer,off); int c2 = get2(buffer,off); int c3 = get3(buffer,off); int c4 = get4(buffer,off); switch (count) { case 73: out.write(encoding[c1]); out.write(encoding[c2]); out.write(encoding[c3]); out.write ('\n') ; out.write(encoding[c4]); count = 1 ; break ; case 74: out.write(encoding[c1]); out.write(encoding[c2]); out.write ('\n') ; out.write(encoding[c3]); out.write(encoding[c4]) ; count = 2 ; break ; case 75: out.write(encoding[c1]); out.write ('\n') ; out.write(encoding[c2]); out.write(encoding[c3]); out.write(encoding[c4]) ; count = 3 ; break ; case 76: out.write('\n') ; out.write(encoding[c1]); out.write(encoding[c2]); out.write(encoding[c3]); out.write(encoding[c4]); count = 4; break; default: out.write(encoding[c1]); out.write(encoding[c2]); out.write(encoding[c3]); out.write(encoding[c4]); count += 4; break; } off += 3; } // Copy remaining bytes to beginning of buffer: for ( int i = 0 ; i < 3 ;i++) buffer[i] = (i < got-off) ? buffer[off+i] : ((byte) 0); off = got-off ; } else { // Total read amount is less then 3 bytes: off += got; } } // Manage the last bytes, from 0 to off: switch (off) { case 1: out.write(encoding[get1(buffer, 0)]); out.write(encoding[get2(buffer, 0)]); out.write('='); out.write('='); break ; case 2: out.write(encoding[get1(buffer, 0)]); out.write(encoding[get2(buffer, 0)]); out.write(encoding[get3(buffer, 0)]); out.write('='); } return; } }
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