The branch OpenSSL_1_1_0-stable has been updated via 56fb454d281a023b3f950d969693553d3f3ceea1 (commit) from ef11e19d1365eea2b1851e6f540a0bf365d303e7 (commit)
- Log ----------------------------------------------------------------- commit 56fb454d281a023b3f950d969693553d3f3ceea1 Author: Pauli <paul.d...@oracle.com> Date: Fri Oct 26 10:54:58 2018 +1000 Timing vulnerability in ECDSA signature generation (CVE-2018-0735) Preallocate an extra limb for some of the big numbers to avoid a reallocation that can potentially provide a side channel. Reviewed-by: Bernd Edlinger <bernd.edlin...@hotmail.de> (Merged from https://github.com/openssl/openssl/pull/7486) (cherry picked from commit 99540ec79491f59ed8b46b4edf130e17dc907f52) ----------------------------------------------------------------------- Summary of changes: crypto/ec/ec_mult.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/crypto/ec/ec_mult.c b/crypto/ec/ec_mult.c index 22bb30f..ff882cc 100644 --- a/crypto/ec/ec_mult.c +++ b/crypto/ec/ec_mult.c @@ -177,8 +177,8 @@ static int ec_mul_consttime(const EC_GROUP *group, EC_POINT *r, */ cardinality_bits = BN_num_bits(cardinality); group_top = bn_get_top(cardinality); - if ((bn_wexpand(k, group_top + 1) == NULL) - || (bn_wexpand(lambda, group_top + 1) == NULL)) + if ((bn_wexpand(k, group_top + 2) == NULL) + || (bn_wexpand(lambda, group_top + 2) == NULL)) { goto err; if (!BN_copy(k, scalar)) @@ -205,7 +205,7 @@ static int ec_mul_consttime(const EC_GROUP *group, EC_POINT *r, * k := scalar + 2*cardinality */ kbit = BN_is_bit_set(lambda, cardinality_bits); - BN_consttime_swap(kbit, k, lambda, group_top + 1); + BN_consttime_swap(kbit, k, lambda, group_top + 2); group_top = bn_get_top(group->field); if ((bn_wexpand(s->X, group_top) == NULL) _____ openssl-commits mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-commits