De-mutable PointGFp

4 files changed, 9 insertions, 9 deletions

diff --git a/src/math/gfpmath/gfp_element.cpp b/src/math/gfpmath/gfp_element.cpp
index d49ca4989..fbc2021e9 100644
--- a/src/math/gfpmath/gfp_element.cpp
+++ b/src/math/gfpmath/gfp_element.cpp
@@ -77,7 +77,7 @@ GFpElement& GFpElement::operator/=(const GFpElement& rhs)
    return *this;
    }
 
-bool GFpElement::is_zero()
+bool GFpElement::is_zero() const
    {
    return (m_value.is_zero());
    // this is correct because x_bar = x * r = x = 0 for x = 0
diff --git a/src/math/gfpmath/gfp_element.h b/src/math/gfpmath/gfp_element.h
index a13de0568..ee436d671 100644
--- a/src/math/gfpmath/gfp_element.h
+++ b/src/math/gfpmath/gfp_element.h
@@ -93,7 +93,7 @@ class BOTAN_DLL GFpElement
       * a backtransformation to the ordinary-residue)
       * @result true, if the value is zero, false otherwise.
       */
-      bool is_zero();
+      bool is_zero() const;
 
       /**
       * return prime number of GF(p)
diff --git a/src/math/gfpmath/point_gfp.cpp b/src/math/gfpmath/point_gfp.cpp
index f3fd3e588..f4626cd4e 100644
--- a/src/math/gfpmath/point_gfp.cpp
+++ b/src/math/gfpmath/point_gfp.cpp
@@ -223,7 +223,7 @@ PointGFp& PointGFp::mult2_in_place()
 * Z has value one, i.e. x and y correspond to
 * their values in affine coordinates
 */
-PointGFp PointGFp::get_z_to_one() const
+PointGFp PointGFp::get_z_to_one()
    {
    return PointGFp(*this).set_z_to_one();
    }
@@ -234,7 +234,7 @@ PointGFp PointGFp::get_z_to_one() const
 * their values in affine coordinates.
 * returns *this.
 */
-const PointGFp& PointGFp::set_z_to_one() const
+const PointGFp& PointGFp::set_z_to_one()
    {
    if(!(mZ.get_value() == BigInt(1)) && !(mZ.get_value() == BigInt(0)))
       {
diff --git a/src/math/gfpmath/point_gfp.h b/src/math/gfpmath/point_gfp.h
index ea73b9e0d..04a6cc3af 100644
--- a/src/math/gfpmath/point_gfp.h
+++ b/src/math/gfpmath/point_gfp.h
@@ -111,7 +111,7 @@ class BOTAN_DLL PointGFp
       * Set z coordinate to one.
       * @return *this
       */
-      const PointGFp& set_z_to_one() const;
+      const PointGFp& set_z_to_one();
 
       /**
       * Return a point
@@ -120,7 +120,7 @@ class BOTAN_DLL PointGFp
       * thus x and y have just the affine values.
       * @result *this
       */
-      PointGFp get_z_to_one() const;
+      PointGFp get_z_to_one();
 
       /**
       * Return base curve of this point
@@ -186,9 +186,9 @@ class BOTAN_DLL PointGFp
       bool operator==(const PointGFp& other) const;
    private:
       CurveGFp mC;
-      mutable GFpElement mX;  // NOTE: these values must be mutable (affine<->proj)
-      mutable GFpElement mY;
-      mutable GFpElement mZ;
+      GFpElement mX;
+      GFpElement mY;
+      GFpElement mZ;
    };
 
 // relational operators