[GNUnet-SVN] r28983 - gnunet-java/src/main/java/org/gnunet/util

[gnunet]

Author: dold
Date: 2013-09-04 13:26:29 +0200 (Wed, 04 Sep 2013)
New Revision: 28983

Modified:
   gnunet-java/src/main/java/org/gnunet/util/CryptoECC.java
Log:
comment

Modified: gnunet-java/src/main/java/org/gnunet/util/CryptoECC.java
===================================================================
--- gnunet-java/src/main/java/org/gnunet/util/CryptoECC.java    2013-09-04 
11:20:04 UTC (rev 28982)
+++ gnunet-java/src/main/java/org/gnunet/util/CryptoECC.java    2013-09-04 
11:26:29 UTC (rev 28983)
@@ -11,9 +11,8 @@
 import java.security.NoSuchAlgorithmException;
 
 /**
- * Implementation of the Ed25519 public-key signature system.
- * Original version written and placed into the public domain by k3d3 
(https://github.com/k3d3/ed25519-java).
- * See also http://ed25519.cr.yp.to/.
+ * Implementation of the Ed25519 public-key signature system. See 
http://ed25519.cr.yp.to/.
+ * Original Java version written and placed into the public domain by k3d3 
(https://github.com/k3d3/ed25519-java).
  */
 public class CryptoECC {
 
@@ -197,6 +196,13 @@
         return h[i/8] >> (i%8) & 1;
     }
 
+    /**
+     * Compute from a private key the scalar value that yields the public key 
when
+     * multiplied with the generator point.
+     *
+     * @param sk private key
+     * @return public key coefficient
+     */
     static private BigInteger computePublicKeyCoefficient(PrivateKey sk) {
         byte[] h = sha512.digest(sk.d);
         BigInteger a = BigInteger.valueOf(2).pow(b-2);
@@ -208,7 +214,7 @@
     }
 
     /**
-     * Derive the public key from the private key 'sk',
+     * Derive the public key from the private key 'sk'.
      *
      * @param sk private key
      * @return public key derived from 'sk'