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fix x86_64-specific crash with one-word modulus.

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PR: #3397

(Imported from upstream's 47b9e06cfd3a4fa89a690309e5839ed57e93f0f8)

Change-Id: I92d46a3132233c179f4b708d506bfb7212c26a33
This commit is contained in:
Adam Langley 2014-07-24 17:57:42 -07:00
parent e3142a788c
commit 43dca4d8bb
1 changed files with 1 additions and 1 deletions
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2
crypto/bn/exponentiation.c
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@ -982,7 +982,7 @@ 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,
const BN_ULONG * n0, int num, int power);