MLSAG speedup and additional checks

1 files changed, 9 insertions, 37 deletions

diff --git a/src/ringct/rctOps.cpp b/src/ringct/rctOps.cpp
index b5499262f..6e4d063df 100644
--- a/src/ringct/rctOps.cpp
+++ b/src/ringct/rctOps.cpp
@@ -620,44 +620,16 @@ namespace rct {
        sc_reduce32(rv.bytes);
        return rv;
    }
-
-    key hashToPointSimple(const key & hh) {
-        key pointk;
-        ge_p1p1 point2;
-        ge_p2 point;
-        ge_p3 res;
-        key h = cn_fast_hash(hh); 
-        CHECK_AND_ASSERT_THROW_MES_L1(ge_frombytes_vartime(&res, h.bytes) == 0, "ge_frombytes_vartime failed at "+boost::lexical_cast<std::string>(__LINE__));
-        ge_p3_to_p2(&point, &res);
-        ge_mul8(&point2, &point);
-        ge_p1p1_to_p3(&res, &point2);
-        ge_p3_tobytes(pointk.bytes, &res);
-        return pointk;
-    }    
     
-    key hashToPoint(const key & hh) {
-        key pointk;
-        ge_p2 point;
-        ge_p1p1 point2;
-        ge_p3 res;
-        key h = cn_fast_hash(hh); 
-        ge_fromfe_frombytes_vartime(&point, h.bytes);
-        ge_mul8(&point2, &point);
-        ge_p1p1_to_p3(&res, &point2);        
-        ge_p3_tobytes(pointk.bytes, &res);
-        return pointk;
-    }
-
-    void hashToPoint(key & pointk, const key & hh) {
-        ge_p2 point;
-        ge_p1p1 point2;
-        ge_p3 res;
-        key h = cn_fast_hash(hh); 
-        ge_fromfe_frombytes_vartime(&point, h.bytes);
-        ge_mul8(&point2, &point);
-        ge_p1p1_to_p3(&res, &point2);        
-        ge_p3_tobytes(pointk.bytes, &res);
-    }    
+    // Hash a key to p3 representation
+    void hash_to_p3(ge_p3 &hash8_p3, const key &k) {
+      key hash_key = cn_fast_hash(k);
+      ge_p2 hash_p2;
+      ge_fromfe_frombytes_vartime(&hash_p2, hash_key.bytes);
+      ge_p1p1 hash8_p1p1;
+      ge_mul8(&hash8_p1p1, &hash_p2);
+      ge_p1p1_to_p3(&hash8_p3, &hash8_p1p1);
+    }
 
     //sums a vector of curve points (for scalars use sc_add)
     void sumKeys(key & Csum, const keyV &  Cis) {