Author: nextgens
Date: 2007-09-10 13:49:03 +0000 (Mon, 10 Sep 2007)
New Revision: 15118
Modified:
branches/freenet-jfk/src/freenet/crypt/DiffieHellmanLightContext.java
Log:
Add a new method to DiffieHellmanLightContext : getHMACKey ... Calling it is
costy.
Modified: branches/freenet-jfk/src/freenet/crypt/DiffieHellmanLightContext.java
===================================================================
--- branches/freenet-jfk/src/freenet/crypt/DiffieHellmanLightContext.java
2007-09-10 13:06:23 UTC (rev 15117)
+++ branches/freenet-jfk/src/freenet/crypt/DiffieHellmanLightContext.java
2007-09-10 13:49:03 UTC (rev 15118)
@@ -1,5 +1,7 @@
package freenet.crypt;
+import freenet.support.Logger;
+
import net.i2p.util.NativeBigInteger;
public class DiffieHellmanLightContext {
@@ -12,6 +14,8 @@
public final DHGroup group;
/** The signature of (g^r, grpR) */
public DSASignature signature = null;
+
+ private final boolean logMINOR;
public String toString() {
StringBuffer sb = new StringBuffer();
@@ -28,9 +32,24 @@
this.myExponent = myExponent;
this.myExponential = myExponential;
this.group = group;
+ logMINOR = Logger.shouldLog(Logger.MINOR, this);
}
public void setSignature(DSASignature sig) {
this.signature = sig;
}
+
+ /*
+ * Calling the following is costy; avoid
+ */
+ public NativeBigInteger getHMACKey(NativeBigInteger peerExponential,
NativeBigInteger groupP) {
+ if(logMINOR)
+ Logger.minor(this, "My exponent:
"+myExponent.toHexString()+", my exponential: "+myExponential.toHexString()+",
peer's exponential: "+peerExponential.toHexString());
+ NativeBigInteger sharedSecret =
+ (NativeBigInteger) peerExponential.modPow(myExponent,
groupP);
+ if(logMINOR)
+ Logger.minor(this, "g^ir mod p = " +
sharedSecret.toString());
+
+ return sharedSecret;
+ }
}
\ No newline at end of file
