Latest update

crypto/ex_data.c

@@ -362,6 +362,36 @@ void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
     ad->sk = NULL;
 }
 
+/*
+ * Allocate a given CRYPTO_EX_DATA item using the class specific allocation
+ * function
+ */
+int CRYPTO_alloc_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad,
+                         int idx)
+{
+    EX_CALLBACK *f;
+    EX_CALLBACKS *ip;
+    void *curval;
+
+    curval = CRYPTO_get_ex_data(ad, idx);
+
+    /* Already there, no need to allocate */
+    if (curval != NULL)
+        return 1;
+
+    ip = get_and_lock(class_index);
+    f = sk_EX_CALLBACK_value(ip->meth, idx);
+    CRYPTO_THREAD_unlock(ex_data_lock);
+
+    /*
+     * This should end up calling CRYPTO_set_ex_data(), which allocates
+     * everything necessary to support placing the new data in the right spot.
+     */
+    f->new_func(obj, curval, ad, idx, f->argl, f->argp);
+
+    return 1;
+}
+
 /*
  * For a given CRYPTO_EX_DATA variable, set the value corresponding to a
  * particular index in the class used by this variable