diff options
Diffstat (limited to 'src/crypto/fipsmodule/ec/p256-x86_64-table.h')
| -rw-r--r-- | src/crypto/fipsmodule/ec/p256-x86_64-table.h | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/src/crypto/fipsmodule/ec/p256-x86_64-table.h b/src/crypto/fipsmodule/ec/p256-x86_64-table.h index e4705f8e..575a2034 100644 --- a/src/crypto/fipsmodule/ec/p256-x86_64-table.h +++ b/src/crypto/fipsmodule/ec/p256-x86_64-table.h @@ -12,17 +12,17 @@ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ -/* This is the precomputed constant time access table for the code in - * p256-x86_64.c, for the default generator. The table consists of 37 - * subtables, each subtable contains 64 affine points. The affine points are - * encoded as eight uint64's, four for the x coordinate and four for the y. - * Both values are in little-endian order. There are 37 tables because a - * signed, 6-bit wNAF form of the scalar is used and ceil(256/(6 + 1)) = 37. - * Within each table there are 64 values because the 6-bit wNAF value can take - * 64 values, ignoring the sign bit, which is implemented by performing a - * negation of the affine point when required. We would like to align it to 2MB - * in order to increase the chances of using a large page but that appears to - * lead to invalid ELF files being produced. */ +// This is the precomputed constant time access table for the code in +// p256-x86_64.c, for the default generator. The table consists of 37 +// subtables, each subtable contains 64 affine points. The affine points are +// encoded as eight uint64's, four for the x coordinate and four for the y. +// Both values are in little-endian order. There are 37 tables because a +// signed, 6-bit wNAF form of the scalar is used and ceil(256/(6 + 1)) = 37. +// Within each table there are 64 values because the 6-bit wNAF value can take +// 64 values, ignoring the sign bit, which is implemented by performing a +// negation of the affine point when required. We would like to align it to 2MB +// in order to increase the chances of using a large page but that appears to +// lead to invalid ELF files being produced. static const alignas(4096) BN_ULONG ecp_nistz256_precomputed[37][64 * sizeof(P256_POINT_AFFINE) / |