diff options
Diffstat (limited to 'crypto/bn/bn_exp.c')
| -rw-r--r-- | crypto/bn/bn_exp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/crypto/bn/bn_exp.c b/crypto/bn/bn_exp.c index 5b00aa1e3c..aae00491db 100644 --- a/crypto/bn/bn_exp.c +++ b/crypto/bn/bn_exp.c @@ -654,16 +654,21 @@ int BN_mod_exp_mont_consttime(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p, numPowers = 1 << window; powerbufLen = sizeof(m->d[0])*(top*numPowers + (top>numPowers?top:numPowers)); +#ifdef alloca if (powerbufLen < 3072) powerbufFree = alloca(powerbufLen+MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH); - else if ((powerbufFree=(unsigned char*)OPENSSL_malloc(powerbufLen+MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH)) == NULL) + else +#endif + if ((powerbufFree=(unsigned char*)OPENSSL_malloc(powerbufLen+MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH)) == NULL) goto err; powerbuf = MOD_EXP_CTIME_ALIGN(powerbufFree); memset(powerbuf, 0, powerbufLen); +#ifdef alloca if (powerbufLen < 3072) powerbufFree = NULL; +#endif computeTemp.d = (BN_ULONG *)(powerbuf + sizeof(m->d[0])*top*numPowers); computeTemp.top = computeTemp.dmax = top; |