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authorAdam Langley <agl@google.com>2015-09-24 23:03:06 +0000
committerAndroid Git Automerger <android-git-automerger@android.com>2015-09-24 23:03:06 +0000
commitc737bc23bc868fff21e5c1b95940813f709ea550 (patch)
treedd743d9d64af3145fe96b8d5fc2f3427544794bd /src/crypto/bn/montgomery.c
parent0267d647a4d272af8b9e7c91063d374f7e2775bb (diff)
parent3781a60670f92c3c6fca860cb4589495cefa2e56 (diff)
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am 3781a606: am 1e4884f6: external/boringssl: sync with upstream.
* commit '3781a60670f92c3c6fca860cb4589495cefa2e56': external/boringssl: sync with upstream.
Diffstat (limited to 'src/crypto/bn/montgomery.c')
-rw-r--r--src/crypto/bn/montgomery.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/crypto/bn/montgomery.c b/src/crypto/bn/montgomery.c
index 152cf2d..c6c9c88 100644
--- a/src/crypto/bn/montgomery.c
+++ b/src/crypto/bn/montgomery.c
@@ -110,6 +110,7 @@
#include <string.h>
+#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/thread.h>
@@ -176,6 +177,11 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx) {
BIGNUM tmod;
BN_ULONG buf[2];
+ if (BN_is_zero(mod)) {
+ OPENSSL_PUT_ERROR(BN, BN_R_DIV_BY_ZERO);
+ return 0;
+ }
+
BN_CTX_start(ctx);
Ri = BN_CTX_get(ctx);
if (Ri == NULL) {