Remove z_size parameter to bigint_monty_redc because it should always

be 2*(p_size+1). Document that it clears the high part of z.

Don't clear the workspace before calling Karatsuba in bigint_mul or
bigint_sqr - they clear it every time anyway.

Don't bother masking words in the Montgomery_Exponentiator as redc
zeros those words. Also don't bother calling z.clear() as the multiply
operation does that already.

1 files changed, 0 insertions, 6 deletions

diff --git a/src/math/mp/mp_karat.cpp b/src/math/mp/mp_karat.cpp
index 6d9adb4bf..b549a05c8 100644
--- a/src/math/mp/mp_karat.cpp
+++ b/src/math/mp/mp_karat.cpp
@@ -253,10 +253,7 @@ void bigint_mul(word z[], size_t z_size, word workspace[],
       const size_t N = karatsuba_size(z_size, x_size, x_sw, y_size, y_sw);
 
       if(N)
-         {
-         clear_mem(workspace, 2*N);
          karatsuba_mul(z, x, y, N, workspace);
-         }
       else
          bigint_simple_mul(z, x, x_sw, y, y_sw);
       }
@@ -297,10 +294,7 @@ void bigint_sqr(word z[], size_t z_size, word workspace[],
       const size_t N = karatsuba_size(z_size, x_size, x_sw);
 
       if(N)
-         {
-         clear_mem(workspace, 2*N);
          karatsuba_sqr(z, x, N, workspace);
-         }
       else
          bigint_simple_sqr(z, x, x_sw);
       }