/***** BEGIN LICENSE BLOCK *****
* Version: EPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2006 Ola Bini <ola@ologix.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.ext.openssl;
import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.RubyString;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
/**
* @author <a href="mailto:ola.bini@ki.se">Ola Bini</a>
*/
public class Random {
private static class Holder {
private volatile java.util.Random plainRandom;
private volatile java.security.SecureRandom secureRandom;
//RandomHolder(java.util.Random plainRandom, java.security.SecureRandom secureRandom) {
// this.plainRandom = plainRandom; this.secureRandom = secureRandom;
//}
final java.util.Random getPlainRandom() {
if (plainRandom == null) {
synchronized(this) {
if (plainRandom == null) {
plainRandom = new java.util.Random();
}
}
}
return plainRandom;
}
final java.security.SecureRandom getSecureRandom() {
if (secureRandom == null) {
synchronized(this) {
if (secureRandom == null) {
secureRandom = SecurityHelper.getSecureRandom();
}
}
}
return secureRandom;
}
}
public static void createRandom(final Ruby runtime, final RubyModule OpenSSL) {
final RubyModule Random = OpenSSL.defineModuleUnder("Random");
RubyClass OpenSSLError = (RubyClass) OpenSSL.getConstant("OpenSSLError");
Random.defineClassUnder("RandomError", OpenSSLError, OpenSSLError.getAllocator());
Random.defineAnnotatedMethods(Random.class);
Random.dataWrapStruct(new Holder());
}
@JRubyMethod(meta = true)
public static RubyString random_bytes(final ThreadContext context,
final IRubyObject self, final IRubyObject arg) {
final Ruby runtime = context.runtime;
return random_bytes(runtime, self, toInt(runtime, arg));
}
static RubyString random_bytes(final Ruby runtime, final int len) {
final RubyModule Random = (RubyModule) runtime.getModule("OpenSSL").getConstantAt("Random");
return generate(runtime, Random, len, true); // secure-random
}
private static RubyString random_bytes(final Ruby runtime,
final IRubyObject self, final int len) {
return generate(runtime, self, len, true); // secure-random
}
@JRubyMethod(meta = true)
public static RubyString pseudo_bytes(final ThreadContext context,
final IRubyObject self, final IRubyObject len) {
final Ruby runtime = context.runtime;
return generate(runtime, self, toInt(runtime, len), false); // plain-random
}
private static int toInt(final Ruby runtime, final IRubyObject arg) {
final long len = RubyNumeric.fix2long(arg);
if ( len < 0 || len > Integer.MAX_VALUE ) {
throw runtime.newArgumentError("negative string size (or size too big) " + len);
}
return (int) len;
}
private static RubyString generate(final Ruby runtime,
final IRubyObject self, final int len, final boolean secure) {
final Holder holder = unwrapStruct(self);
final byte[] bytes = new byte[len];
( secure ? holder.getSecureRandom() : holder.getPlainRandom() ).nextBytes(bytes);
return RubyString.newString(runtime, new ByteList(bytes, false));
}
private static Holder unwrapStruct(final IRubyObject Random) {
return (Holder) ((RubyModule) Random).dataGetStruct();
}
@JRubyMethod(meta = true) // seed(str) -> str
public static IRubyObject seed(final ThreadContext context,
final IRubyObject self, IRubyObject str) {
final byte[] seed = str.asString().getBytes();
final Holder holder = unwrapStruct(self);
holder.getSecureRandom().setSeed(seed); // seed supplements existing
long s; int l = seed.length;
if ( l >= 4 ) {
s = (seed[0] << 24) | (seed[1] << 16) | (seed[2] << 8) | seed[3];
holder.getPlainRandom().setSeed(s);
}
return str;
}
// true if the PRNG has been seeded with enough data, false otherwise
@JRubyMethod(meta = true, name = "status?") // status? => true | false
public static IRubyObject status_p(final ThreadContext context,
final IRubyObject self) {
//final Holder holder = unwrapStruct(self);
//if ( holder.secureRandom == null ) {
// return context.runtime.newBoolean(false); // just a HINT
//}
return context.runtime.newBoolean(true);
}
// C-Ruby OpenSSL::Random API stubs :
@JRubyMethod(meta = true) // random_add(str, entropy) -> self
public static IRubyObject random_add(final ThreadContext context,
final IRubyObject self, IRubyObject str, IRubyObject entropy) {
return self;
}
@JRubyMethod(meta = true) // load_random_file(filename)
public static IRubyObject load_random_file(final ThreadContext context,
final IRubyObject self, IRubyObject fname) {
return context.runtime.getNil();
}
@JRubyMethod(meta = true) // write_random_file(filename) -> true
public static IRubyObject write_random_file(final ThreadContext context,
final IRubyObject self, IRubyObject fname) {
return context.runtime.getNil();
}
@JRubyMethod(meta = true) // egd(filename) -> true
public static IRubyObject egd(final ThreadContext context,
final IRubyObject self, IRubyObject fname) {
return context.runtime.getNil();
}
@JRubyMethod(meta = true) // egd_bytes(filename, length) -> true
public static IRubyObject egd_bytes(final ThreadContext context,
final IRubyObject self, IRubyObject fname, IRubyObject len) {
return context.runtime.getNil();
}
}