Fix bn_x2bn

justsmth · Sep 17, 2024 · f19df5a · f19df5a
1 parent 6cfcaae
commit f19df5a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/crypto/bn_extra/convert.c b/crypto/bn_extra/convert.c
@@ -193,6 +193,11 @@ static int bn_x2bn(BIGNUM **outp, const char *in, decode_func decode, char_test_
 
   for (i = 0; want_char((unsigned char)in[i]) && i + neg < INT_MAX; i++) {}
 
+  if(i == 0) {
+    OPENSSL_PUT_ERROR(BN, BN_R_INVALID_INPUT);
+    return 0;
+  }
+
   num = i + neg;
   if (outp == NULL) {
     return num;