diff options
| author | lloyd <[email protected]> | 2010-09-24 17:27:07 +0000 |
|---|---|---|
| committer | lloyd <[email protected]> | 2010-09-24 17:27:07 +0000 |
| commit | 6bce29a5d0e2a004fdbac4f30e35c9266ff45295 (patch) | |
| tree | c5893d8c4d6faad7804cdce57a913d9faf42d9b3 /src/math/numbertheory/point_gfp.h | |
| parent | 9aaa77f62ec389f94e674deeda14def72ddd515b (diff) | |
Modify bigint_monty_redc to take an additional workspace argument.
Modify it to avoid a timing condition during the compare at the end;
this is done by always doing the subtraction, and then copying to the
output either the pre-subtraction or post-subtraction value depending
on if the final borrow was set or not.
Diffstat (limited to 'src/math/numbertheory/point_gfp.h')
| -rw-r--r-- | src/math/numbertheory/point_gfp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/math/numbertheory/point_gfp.h b/src/math/numbertheory/point_gfp.h index 5b3e32c7d..42baa7d2c 100644 --- a/src/math/numbertheory/point_gfp.h +++ b/src/math/numbertheory/point_gfp.h @@ -179,6 +179,7 @@ class BOTAN_DLL PointGFp /** * Montgomery multiplication/reduction + * @warning z cannot alias x or y * @param z output * @param x first multiplicand * @param y second multiplicand @@ -203,6 +204,7 @@ class BOTAN_DLL PointGFp /** * Montgomery squaring/reduction + * @warning z cannot alias x * @param z output * @param x multiplicand * @param workspace temp space |