diff options
Diffstat (limited to 'crypto/ec/ec_mult.c')
| -rw-r--r-- | crypto/ec/ec_mult.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/ec/ec_mult.c b/crypto/ec/ec_mult.c index 755d64400a..968125f3cd 100644 --- a/crypto/ec/ec_mult.c +++ b/crypto/ec/ec_mult.c @@ -441,7 +441,7 @@ int ec_wNAF_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, * scalar multiplication implementation based on a Montgomery ladder, * with various timing attack defenses. */ - if ((scalar != NULL) && (num == 0)) { + if ((scalar != group->order) && (scalar != NULL) && (num == 0)) { /*- * In this case we want to compute scalar * GeneratorPoint: this * codepath is reached most prominently by (ephemeral) key @@ -452,7 +452,7 @@ int ec_wNAF_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, */ return ec_scalar_mul_ladder(group, r, scalar, NULL, ctx); } - if ((scalar == NULL) && (num == 1)) { + if ((scalar == NULL) && (num == 1) && (scalars[0] != group->order)) { /*- * In this case we want to compute scalar * VariablePoint: this * codepath is reached most prominently by the second half of ECDH, |