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bn_exp.c: fix x86_64-specific crash with one-word modulus.
author
Andy Polyakov
<appro@openssl.org>
Wed, 2 Jul 2014 17:35:50 +0000
(19:35 +0200)
committer
Andy Polyakov
<appro@openssl.org>
Wed, 2 Jul 2014 17:35:50 +0000
(19:35 +0200)
PR: #3397
crypto/bn/bn_exp.c
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diff --git
a/crypto/bn/bn_exp.c
b/crypto/bn/bn_exp.c
index c121122f3cb28668fb900cb90475443afdfe8296..2d051b2c35b852da488ab1dbe3d4691f2ec1fdb9 100644
(file)
--- a/
crypto/bn/bn_exp.c
+++ b/
crypto/bn/bn_exp.c
@@
-909,7
+909,7
@@
int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
/* Dedicated window==4 case improves 512-bit RSA sign by ~15%, but as
* 512-bit RSA is hardly relevant, we omit it to spare size... */
- if (window==5)
+ if (window==5
&& top>1
)
{
void bn_mul_mont_gather5(BN_ULONG *rp,const BN_ULONG *ap,
const void *table,const BN_ULONG *np,