1 files changed, 81 insertions, 0 deletions
diff --git a/java/com/jcraft/jsch/jce/Random.java b/java/com/jcraft/jsch/jce/Random.java
new file mode 100644
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+++ b/java/com/jcraft/jsch/jce/Random.java
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+/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
+/*
+Copyright (c) 2002-2012 ymnk, JCraft,Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  1. Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+
+  2. Redistributions in binary form must reproduce the above copyright 
+     notice, this list of conditions and the following disclaimer in 
+     the documentation and/or other materials provided with the distribution.
+
+  3. The names of the authors may not be used to endorse or promote products
+     derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
+INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package com.jcraft.jsch.jce;
+
+import java.security.SecureRandom;
+
+public class Random implements com.jcraft.jsch.Random{
+  private byte[] tmp=new byte[16];
+  private SecureRandom random=null;
+  public Random(){
+
+    // We hope that 'new SecureRandom()' will use NativePRNG algorithm
+    // on Sun's Java5 for GNU/Linux and Solaris.
+    // It seems NativePRNG refers to /dev/urandom and it must not be blocked,
+    // but NativePRNG is slower than SHA1PRNG ;-<
+    // TIPS: By adding option '-Djava.security.egd=file:/dev/./urandom'
+    //       SHA1PRNG will be used instead of NativePRNG.
+    // On MacOSX, 'new SecureRandom()' will use NativePRNG algorithm and
+    // it is also slower than SHA1PRNG.
+    // On Windows, 'new SecureRandom()' will use SHA1PRNG algorithm.
+    random=new SecureRandom();
+
+    /*
+    try{ 
+      random=SecureRandom.getInstance("SHA1PRNG"); 
+      return;
+    }
+    catch(java.security.NoSuchAlgorithmException e){ 
+      // System.err.println(e); 
+    }
+
+    // The following code is for IBM's JCE
+    try{ 
+      random=SecureRandom.getInstance("IBMSecureRandom"); 
+      return;
+    }
+    catch(java.security.NoSuchAlgorithmException ee){ 
+      //System.err.println(ee); 
+    }
+    */
+  }
+  public void fill(byte[] foo, int start, int len){
+    /*
+    // This case will not become true in our usage.
+    if(start==0 && foo.length==len){
+      random.nextBytes(foo);
+      return;
+    }
+    */
+    if(len>tmp.length){ tmp=new byte[len]; }
+    random.nextBytes(tmp);
+    System.arraycopy(tmp, 0, foo, start, len);
+  }
+}