/**
* sha3sum – SHA-3 (Keccak) checksum calculator
*
* Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
import java.io.*;
import java.util.*;
/**
* SHA-3/Keccak chechsum calculator
*
* @author Mattias Andrée <a href="mailto:maandree@member.fsf.org">maandree@member.fsf.org</a>
*/
public class sha3sum
{
/**
* This is the main entry point of the program
*
* @param argv Command line arguments
* @throws IOException On I/O error (such as broken pipes)
*/
public static void main(String[] argv) throws IOException
{
String cmd, _cmd = cmd = ""; //FIXME /proc/self/cmdline split ^@ [0]
if (cmd.indexOf('/') >= 0)
cmd = cmd.substring(cmd.lastIndexOf('/') + 1);
if (cmd.endsWith(".jar"))
cmd = cmd.substring(0, cmd.length() - 3);
cmd = cmd.intern();
int _o, o = _o = 512; /* --outputsize */
if (cmd == "sha3-224sum") o = _o = 224;
else if (cmd == "sha3-256sum") o = _o = 256;
else if (cmd == "sha3-384sum") o = _o = 384;
else if (cmd == "sha3-512sum") o = _o = 512;
int _s, s = _s = 1600; /* --statesiz e */
int _r, r = _r = s - (o << 1); /* --bitrate */
int _c, c = _c = s - r; /* --capacity */
int _w, w = _w = s / 25; /* --wordsize */
int _i, i = _i = 1; /* --iterations */
boolean binary = false;
String[] files = new String[argv.length + 1];
int fptr = 0;
boolean dashed = false;
String[] linger = null;
String[] args = new String[argv.length + 1];
System.arraycopy(argv, 0, args, 0, argv.length);
for (int a = 0, an = args.length; a < an; a++)
{ String arg = args[a];
arg = arg == null ? null : arg.intern();
if (linger != null)
{
linger[0] = linger[0].intern();
if ((linger[0] == "-h") || (linger[0] == "--help"))
{
System.out.println("SHA-3/Keccak checksum calculator");
System.out.println("");
System.out.println("USAGE: sha3sum [option...] < file");
System.out.println(" sha3sum [option...] file...");
System.out.println("");
System.out.println("");
System.out.println("OPTIONS:");
System.out.println(" -r BITRATE");
System.out.println(" --bitrate The bitrate to use for SHA-3. (default: " + _r + ")");
System.out.println(" ");
System.out.println(" -c CAPACITY");
System.out.println(" --capacity The capacity to use for SHA-3. (default: " + _c + ")");
System.out.println(" ");
System.out.println(" -w WORDSIZE");
System.out.println(" --wordsize The word size to use for SHA-3. (default: " + _w + ")");
System.out.println(" ");
System.out.println(" -o OUTPUTSIZE");
System.out.println(" --outputsize The output size to use for SHA-3. (default: " + _o + ")");
System.out.println(" ");
System.out.println(" -s STATESIZE");
System.out.println(" --statesize The state size to use for SHA-3. (default: " + _s + ")");
System.out.println(" ");
System.out.println(" -i ITERATIONS");
System.out.println(" --iterations The number of hash iterations to run. (default: " + _i + ")");
System.out.println(" ");
System.out.println(" -b");
System.out.println(" --binary Print the checksum in binary, rather than hexadecimal.");
System.out.println("");
System.out.println("");
System.out.println("COPYRIGHT:");
System.out.println("");
System.out.println("Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)");
System.out.println("");
System.out.println("This program is free software: you can redistribute it and/or modify");
System.out.println("it under the terms of the GNU General Public License as published by");
System.out.println("the Free Software Foundation, either version 3 of the License, or");
System.out.println("(at your option) any later version.");
System.out.println("");
System.out.println("This program is distributed in the hope that it will be useful,");
System.out.println("but WITHOUT ANY WARRANTY; without even the implied warranty of");
System.out.println("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
System.out.println("GNU General Public License for more details.");
System.out.println("");
System.out.println("You should have received a copy of the GNU General Public License");
System.out.println("along with this program. If not, see <http://www.gnu.org/licenses/>.");
System.exit(2);
}
else
{
if (linger[1] == null)
{
linger[1] = arg;
arg = null;
}
if ((linger[0] == "-r") || (linger[0] == "--bitrate"))
o = (s - (r = Integer.parseInt(linger[1]))) >> 1;
else if ((linger[0] == "-c") || (linger[0] == "--capacity"))
r = s - (c = Integer.parseInt(linger[1]));
else if ((linger[0] == "-w") || (linger[0] == "--wordsize"))
s = (w = Integer.parseInt(linger[1])) * 25;
else if ((linger[0] == "-o") || (linger[0] == "--outputsize"))
r = s - ((o = Integer.parseInt(linger[1])) << 1);
else if ((linger[0] == "-s") || (linger[0] == "--statesize"))
r = (s = Integer.parseInt(linger[1])) - (o << 1);
else if ((linger[0] == "-i") || (linger[0] == "--iterations"))
i = Integer.parseInt(linger[1]);
else
{
System.err.println(_cmd + ": unrecognised option: " + linger[0]);
System.exit(1);
}
}
linger = null;
if (arg == null)
continue;
}
if (arg == null)
continue;
if (dashed)
files[fptr++] = arg == "-" ? null : arg;
else if (arg == "--")
dashed = true;
else if (arg == "-")
files[fptr++] = null;
else if (arg.startsWith("--"))
if (arg.indexOf('=') >= 0)
linger = new String[] { arg.substring(0, arg.indexOf('=')), arg.substring(arg.indexOf('=') + 1) };
else
if (arg == "--binary")
binary = true;
else
linger = new String[] { arg, null };
else if (arg.startsWith("-"))
{
arg = arg.substring(1);
if (arg.charAt(0) == 'b')
{
binary = true;
arg = arg.substring(1);
}
else if (arg.length() == 1)
linger = new String[] { "-" + arg, null };
else
linger = new String[] { "-" + arg.charAt(0), arg.substring(1) };
}
else
files[fptr++] = arg;
}
if (fptr == 0)
files[fptr++] = null;
if (i < 1)
{
System.err.println(_cmd + ": sorry, I will only do at least one iteration!\n");
System.exit(3);
}
byte[] stdin = null;
boolean fail = false;
String filename;
for (int f = 0; f < fptr; f++)
{ if (((filename = files[f]) == null) && (stdin != null))
{ System.out.write(stdin);
continue;
}
String rc = "";
String fn = filename == null ? "/dev/stdin" : filename;
InputStream file = null;
try
{
file = new FileInputStream(fn);
SHA3.initialise(r, c, o);
int blksize = 4096; /** XXX os.stat(os.path.realpath(fn)).st_size; **/
byte[] chunk = new byte[blksize];
for (;;)
{
int read = file.read(chunk, 0, blksize);
if (read <= 0)
break;
SHA3.update(chunk, read);
}
byte[] bs = SHA3.digest();
for (int _ = 1; _ < i; _++)
{
SHA3.initialise(r, c, o);
bs = SHA3.digest(bs);
}
if (binary)
{ if (filename == null)
stdin = bs;
System.out.write(bs);
System.out.flush();
}
else
{ for (int b = 0, bn = bs.length; b < bn; b++)
{ rc += "0123456789ABCDEF".charAt((bs[b] >> 4) & 15);
rc += "0123456789ABCDEF".charAt(bs[b] & 15);
}
rc += " " + (filename == null ? "-" : filename) + "\n";
if (filename == null)
stdin = rc.getBytes("UTF-8");
System.out.print(rc);
System.out.flush();
}
}
catch (final IOException err)
{ System.err.println(_cmd + ": Cannot read file: " + filename + ": " + err);
fail = true;
}
finally
{ if (file != null)
try
{ file.close();
}
catch (final Throwable ignore)
{ //ignore
} } }
System.out.flush();
if (fail)
System.exit(5);
}
}
