Added logging to trace time creation of Randoms

src/main/java/net/schmizz/sshj/transport/random/BouncyCastleRandom.java

@@ -17,6 +17,8 @@ package net.schmizz.sshj.transport.random;
 
 import org.bouncycastle.crypto.prng.RandomGenerator;
 import org.bouncycastle.crypto.prng.VMPCRandomGenerator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.security.SecureRandom;
 
@@ -27,6 +29,8 @@ import java.security.SecureRandom;
 public class BouncyCastleRandom
         implements Random {
 
+    private static final Logger logger = LoggerFactory.getLogger(BouncyCastleRandom.class);
+
     /** Named factory for the BouncyCastle <code>Random</code> */
     public static class Factory
             implements net.schmizz.sshj.common.Factory<Random> {
@@ -41,7 +45,10 @@ public class BouncyCastleRandom
     private final RandomGenerator random = new VMPCRandomGenerator();
 
     public BouncyCastleRandom() {
+        logger.info("Generating random seed from SecureRandom.");
+        long t = System.currentTimeMillis();
         byte[] seed = new SecureRandom().generateSeed(8);
+        logger.debug("Creating random seed took {} ms", System.currentTimeMillis() - t);
         random.addSeedMaterial(seed);
     }
 

src/main/java/net/schmizz/sshj/transport/random/JCERandom.java

@@ -16,10 +16,13 @@
 package net.schmizz.sshj.transport.random;
 
 import java.security.SecureRandom;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /** A {@link Random} implementation using the built-in {@link SecureRandom} PRNG. */
 public class JCERandom
         implements Random {
+    private static final Logger logger = LoggerFactory.getLogger(JCERandom.class);
 
     /** Named factory for the JCE {@link Random} */
     public static class Factory
@@ -38,7 +41,14 @@ public class JCERandom
     }
 
     private byte[] tmp = new byte[16];
-    private final SecureRandom random = new SecureRandom();
+    private final SecureRandom random;
+
+    JCERandom() {
+        logger.info("Creating new SecureRandom.");
+        long t = System.currentTimeMillis();
+        random = new SecureRandom();
+        logger.debug("Random creation took {} ms", System.currentTimeMillis() - t);
+    }
 
     /**
      * Fill the given byte-array with random bytes from this PRNG.
@@ -49,9 +59,9 @@ public class JCERandom
      */
     @Override
     public synchronized void fill(byte[] foo, int start, int len) {
-        if (start == 0 && len == foo.length)
+        if (start == 0 && len == foo.length) {
             random.nextBytes(foo);
-        else
+        } else {
             synchronized (this) {
                 if (len > tmp.length)
                     tmp = new byte[len];
@@ -59,5 +69,6 @@ public class JCERandom
                 System.arraycopy(tmp, 0, foo, start, len);
             }
         }
+    }
 
 }