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-rw-r--r--crypto/bn/bn_mont.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index aadd5db1d8db..be95bd55d020 100644
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c
@@ -361,9 +361,9 @@ void BN_MONT_CTX_free(BN_MONT_CTX *mont)
if (mont == NULL)
return;
- BN_free(&(mont->RR));
- BN_free(&(mont->N));
- BN_free(&(mont->Ni));
+ BN_clear_free(&(mont->RR));
+ BN_clear_free(&(mont->N));
+ BN_clear_free(&(mont->Ni));
if (mont->flags & BN_FLG_MALLOCED)
OPENSSL_free(mont);
}
@@ -373,6 +373,9 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
int ret = 0;
BIGNUM *Ri, *R;
+ if (BN_is_zero(mod))
+ return 0;
+
BN_CTX_start(ctx);
if ((Ri = BN_CTX_get(ctx)) == NULL)
goto err;