Turns out yet another variant of EC_POINT_mul is allowed!

openssl/src/ec.rs

@@ -144,8 +144,25 @@ impl EcPointRef {
         }
     }
 
-    /// Computes `generator * n + q * m`, storing the result in `self`.
+    /// Computes `generator * n`, storing the result ing `self`.
     pub fn mul_generator(&mut self,
+                         group: &EcGroupRef,
+                         n: &BigNumRef,
+                         ctx: &BigNumContextRef)
+                         -> Result<(), ErrorStack> {
+        unsafe {
+            cvt(ffi::EC_POINT_mul(group.as_ptr(),
+                                  self.as_ptr(),
+                                  n.as_ptr(),
+                                  ptr::null(),
+                                  ptr::null(),
+                                  ctx.as_ptr()))
+                .map(|_| ())
+        }
+    }
+
+    /// Computes `generator * n + q * m`, storing the result in `self`.
+    pub fn mul_full(&mut self,
                     group: &EcGroupRef,
                     n: &BigNumRef,
                     q: &EcPointRef,