diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/internal/constant_time.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/internal/constant_time.h b/include/internal/constant_time.h index 0ed6f823c1..e8244cd57b 100644 --- a/include/internal/constant_time.h +++ b/include/internal/constant_time.h @@ -140,6 +140,18 @@ static ossl_inline uint64_t constant_time_lt_64(uint64_t a, uint64_t b) return constant_time_msb_64(a ^ ((a ^ b) | ((a - b) ^ b))); } +#ifdef BN_ULONG +static ossl_inline BN_ULONG constant_time_msb_bn(BN_ULONG a) +{ + return 0 - (a >> (sizeof(a) * 8 - 1)); +} + +static ossl_inline BN_ULONG constant_time_lt_bn(BN_ULONG a, BN_ULONG b) +{ + return constant_time_msb_bn(a ^ ((a ^ b) | ((a - b) ^ b))); +} +#endif + static ossl_inline unsigned int constant_time_ge(unsigned int a, unsigned int b) { |