From 67de29f9e593a52552f838bf3542a85ae7d8278f Mon Sep 17 00:00:00 2001
From: Peter Dettman <peter.dettman@bouncycastle.org>
Date: Wed, 12 Mar 2014 18:11:46 +0700
Subject: Allow subclasses to override the ECMultiplier used for base-point
 multiplication

---
 .../java/org/bouncycastle/crypto/signers/DSTU4145Signer.java     | 7 ++++++-
 .../main/java/org/bouncycastle/crypto/signers/ECDSASigner.java   | 9 +++++++--
 .../java/org/bouncycastle/crypto/signers/ECGOST3410Signer.java   | 7 ++++++-
 3 files changed, 19 insertions(+), 4 deletions(-)

(limited to 'core/src/main/java/org/bouncycastle/crypto/signers')

diff --git a/core/src/main/java/org/bouncycastle/crypto/signers/DSTU4145Signer.java b/core/src/main/java/org/bouncycastle/crypto/signers/DSTU4145Signer.java
index 0a3ef37f..d0b893a6 100644
--- a/core/src/main/java/org/bouncycastle/crypto/signers/DSTU4145Signer.java
+++ b/core/src/main/java/org/bouncycastle/crypto/signers/DSTU4145Signer.java
@@ -75,7 +75,7 @@ public class DSTU4145Signer
 
         BigInteger d = ((ECPrivateKeyParameters)key).getD();
 
-        ECMultiplier basePointMultiplier = new FixedPointCombMultiplier();
+        ECMultiplier basePointMultiplier = createBasePointMultiplier();
 
         do
         {
@@ -135,6 +135,11 @@ public class DSTU4145Signer
         return fieldElement2Integer(n, y).compareTo(r) == 0;
     }
 
+    protected ECMultiplier createBasePointMultiplier()
+    {
+        return new FixedPointCombMultiplier();
+    }
+
     /**
      * Generates random integer such, than its bit length is less than that of n
      */
diff --git a/core/src/main/java/org/bouncycastle/crypto/signers/ECDSASigner.java b/core/src/main/java/org/bouncycastle/crypto/signers/ECDSASigner.java
index 26fd588e..8ea2a5b9 100644
--- a/core/src/main/java/org/bouncycastle/crypto/signers/ECDSASigner.java
+++ b/core/src/main/java/org/bouncycastle/crypto/signers/ECDSASigner.java
@@ -97,7 +97,7 @@ public class ECDSASigner
 
         BigInteger r, s;
 
-        ECMultiplier basePointMultiplier = new FixedPointCombMultiplier();
+        ECMultiplier basePointMultiplier = createBasePointMultiplier();
 
         // 5.3.2
         do // generate s
@@ -169,7 +169,7 @@ public class ECDSASigner
         return v.equals(r);
     }
 
-    private BigInteger calculateE(BigInteger n, byte[] message)
+    protected BigInteger calculateE(BigInteger n, byte[] message)
     {
         int log2n = n.bitLength();
         int messageBitLength = message.length * 8;
@@ -181,4 +181,9 @@ public class ECDSASigner
         }
         return e;
     }
+
+    protected ECMultiplier createBasePointMultiplier()
+    {
+        return new FixedPointCombMultiplier();
+    }
 }
diff --git a/core/src/main/java/org/bouncycastle/crypto/signers/ECGOST3410Signer.java b/core/src/main/java/org/bouncycastle/crypto/signers/ECGOST3410Signer.java
index ed256fe8..0ef88762 100644
--- a/core/src/main/java/org/bouncycastle/crypto/signers/ECGOST3410Signer.java
+++ b/core/src/main/java/org/bouncycastle/crypto/signers/ECGOST3410Signer.java
@@ -75,7 +75,7 @@ public class ECGOST3410Signer
 
         BigInteger r, s;
 
-        ECMultiplier basePointMultiplier = new FixedPointCombMultiplier();
+        ECMultiplier basePointMultiplier = createBasePointMultiplier();
 
         do // generate s
         {
@@ -152,4 +152,9 @@ public class ECGOST3410Signer
 
         return R.equals(r);
     }
+
+    protected ECMultiplier createBasePointMultiplier()
+    {
+        return new FixedPointCombMultiplier();
+    }
 }
-- 
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