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From 337da9779c4ef107a4b7bbaaa198824a489a10ed Mon Sep 17 00:00:00 2001
From: Andreas Wellving <andreas.wellving@enea.com>
Date: Mon, 22 Oct 2018 12:43:16 +0200
Subject: RSA key generation: ensure BN_mod_inverse and BN_mod_exp_mont both get called with...
X-Git-Tag: OpenSSL_1_0_2p~87
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=349a41da1ad88ad87825414752a8ff5fdd6a6c3f
RSA key generation: ensure BN_mod_inverse and BN_mod_exp_mont both get called with BN_FLG_CONSTTIME flag set.
CVE-2018-0737
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 6939eab03a6e23d2bd2c3f5e34fe1d48e542e787)
CVE: CVE-2018-0737
Upstream-Status: Backport [https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=349a41da1ad88ad87825414752a8ff5fdd6a6c3f]
Signed-off-by: Andreas Wellving <andreas.wellving@enea.com>
---
crypto/rsa/rsa_gen.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/crypto/rsa/rsa_gen.c b/crypto/rsa/rsa_gen.c
index a85493d..f5914c0 100644
--- a/crypto/rsa/rsa_gen.c
+++ b/crypto/rsa/rsa_gen.c
@@ -155,6 +155,8 @@ static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value,
if (BN_copy(rsa->e, e_value) == NULL)
goto err;
+ BN_set_flags(rsa->p, BN_FLG_CONSTTIME);
+ BN_set_flags(rsa->q, BN_FLG_CONSTTIME);
/* generate p and q */
for (;;) {
if (!BN_generate_prime_ex(rsa->p, bitsp, 0, NULL, NULL, cb))
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