Changeset 2801

Timestamp:

Apr 16, 2009, 10:43:02 AM (16 years ago)

Author:

Christoph Mayer

Message:

-rand seeding in StartupWrapper gezogen
-bessere rands für identifier

Location:

source/ariba/utility

Files:

• misc/KeyMapping.hpp (modified) (1 diff)
• system/StartupWrapper.cpp (modified) (1 diff)
• types/Identifier.cpp (modified) (3 diffs)

source/ariba/utility/misc/KeyMapping.hpp

@@ -69 +69 @@
 public:
         inline KeyMapping(){
-                srand(time(0));
+                srand( time(NULL) );
         }
 

source/ariba/utility/system/StartupWrapper.cpp

@@ -78 +78 @@
         if( initialized ) return;
         initialized = true;
+
+        //
+        // having seeded the pseudo rng is always good
+        //
+
+        srand( time(NULL) );
 
         //

source/ariba/utility/types/Identifier.cpp

@@ -598 +598 @@
 
         //as mpn_random has no seeding function
-        // we mess aroung here a little to achive randomness
+        // we mess aroung here a little to achive some randomness
+        // using the rand function that _is_ seeded in the 
+        // StartupWrapper::initSystem function
+
         Identifier keyRandom = ZERO;
         mpn_random(keyRandom.key, aSize);
-        Identifier keyTime( time(NULL) );
-        mpn_mul_1( newKey.key, keyRandom.key, aSize, *keyTime.key );
+        Identifier keyrnd( rand() );
+        mpn_mul_1( newKey.key, keyRandom.key, aSize, *keyrnd.key );
 
         newKey.trim();
@@ -608 +611 @@
 }
 
-
-// README: due to some problems with serialization the keylength
-// was changed to 192 bit! As none of the hashing functions
-// can provide 160 bit output, and we currently don't use any
-// hashing for identifiers in the demo at all ... this is all commented out!!
-
-
-// generate sha1 hash
 Identifier Identifier::sha1(const string& input) {
         Identifier newKey;
@@ -652 +647 @@
 }
 
-
-
 // generate a key=2**exponent
 Identifier Identifier::pow2(uint exponent) {