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Add a constant time flag to one of the bignums to avoid a timing leak.

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Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7549)

(cherry picked from commit 00496b6423)
This commit is contained in:
Pauli 2018-11-01 08:44:11 +10:00
parent 222b0a8e1a
commit 6039651c43
1 changed files with 1 additions and 0 deletions
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crypto/dsa/dsa_ossl.c
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@ -223,6 +223,7 @@ static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in,
} while (BN_is_zero(k));
BN_set_flags(k, BN_FLG_CONSTTIME);
BN_set_flags(l, BN_FLG_CONSTTIME);
if (dsa->flags & DSA_FLAG_CACHE_MONT_P) {
if (!BN_MONT_CTX_set_locked(&dsa->method_mont_p,