+static void int_cleanup(void)
+ {
+ EX_DATA_CHECK(return;)
+ lh_doall(ex_data, def_cleanup_cb);
+ lh_free(ex_data);
+ ex_data = NULL;
+ impl = NULL;
+ }
+
+static int int_get_new_index(int class_index, long argl, void *argp,
+ CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
+ CRYPTO_EX_free *free_func)
+ {
+ EX_CLASS_ITEM *item = def_get_class(class_index);
+ if(!item)
+ return -1;
+ return def_add_index(item, argl, argp, new_func, dup_func, free_func);
+ }
+
+/* Thread-safe by copying a class's array of "CRYPTO_EX_DATA_FUNCS" entries in
+ * the lock, then using them outside the lock. NB: Thread-safety only applies to
+ * the global "ex_data" state (ie. class definitions), not thread-safe on 'ad'
+ * itself. */
+static int int_new_ex_data(int class_index, void *obj,
+ CRYPTO_EX_DATA *ad)
+ {
+ int mx,i;
+ void *ptr;
+ CRYPTO_EX_DATA_FUNCS **storage = NULL;
+ EX_CLASS_ITEM *item = def_get_class(class_index);
+ if(!item)
+ /* error is already set */
+ return 0;
+ ad->sk = NULL;
+ CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
+ mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
+ if(mx > 0)
+ {
+ storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*));
+ if(!storage)
+ goto skip;
+ for(i = 0; i < mx; i++)
+ storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i);
+ }
+skip:
+ CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA);
+ if((mx > 0) && !storage)
+ {
+ CRYPTOerr(CRYPTO_F_INT_NEW_EX_DATA,ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ for(i = 0; i < mx; i++)
+ {
+ if(storage[i] && storage[i]->new_func)
+ {
+ ptr = CRYPTO_get_ex_data(ad, i);
+ storage[i]->new_func(obj,ptr,ad,i,
+ storage[i]->argl,storage[i]->argp);
+ }
+ }
+ if(storage)
+ OPENSSL_free(storage);
+ return 1;
+ }
+
+/* Same thread-safety notes as for "int_new_ex_data" */
+static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
+ CRYPTO_EX_DATA *from)
+ {
+ int mx, j, i;
+ char *ptr;
+ CRYPTO_EX_DATA_FUNCS **storage = NULL;
+ EX_CLASS_ITEM *item;
+ if(!from->sk)
+ /* 'to' should be "blank" which *is* just like 'from' */
+ return 1;
+ if((item = def_get_class(class_index)) == NULL)
+ return 0;
+ CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
+ mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
+ j = sk_num(from->sk);
+ if(j < mx)
+ mx = j;
+ if(mx > 0)
+ {
+ storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*));
+ if(!storage)
+ goto skip;
+ for(i = 0; i < mx; i++)
+ storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i);
+ }
+skip:
+ CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA);
+ if((mx > 0) && !storage)
+ {
+ CRYPTOerr(CRYPTO_F_INT_DUP_EX_DATA,ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ for(i = 0; i < mx; i++)
+ {
+ ptr = CRYPTO_get_ex_data(from, i);
+ if(storage[i] && storage[i]->dup_func)
+ storage[i]->dup_func(to,from,&ptr,i,
+ storage[i]->argl,storage[i]->argp);
+ CRYPTO_set_ex_data(to,i,ptr);
+ }
+ if(storage)
+ OPENSSL_free(storage);
+ return 1;
+ }
+
+/* Same thread-safety notes as for "int_new_ex_data" */
+static void int_free_ex_data(int class_index, void *obj,
+ CRYPTO_EX_DATA *ad)
+ {
+ int mx,i;
+ EX_CLASS_ITEM *item;
+ void *ptr;
+ CRYPTO_EX_DATA_FUNCS **storage = NULL;
+ if((item = def_get_class(class_index)) == NULL)
+ return;
+ CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
+ mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
+ if(mx > 0)
+ {
+ storage = OPENSSL_malloc(mx * sizeof(CRYPTO_EX_DATA_FUNCS*));
+ if(!storage)
+ goto skip;
+ for(i = 0; i < mx; i++)
+ storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(item->meth,i);
+ }
+skip:
+ CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA);
+ if((mx > 0) && !storage)
+ {
+ CRYPTOerr(CRYPTO_F_INT_FREE_EX_DATA,ERR_R_MALLOC_FAILURE);
+ return;
+ }
+ for(i = 0; i < mx; i++)
+ {
+ if(storage[i] && storage[i]->free_func)
+ {
+ ptr = CRYPTO_get_ex_data(ad,i);
+ storage[i]->free_func(obj,ptr,ad,i,
+ storage[i]->argl,storage[i]->argp);
+ }
+ }
+ if(storage)
+ OPENSSL_free(storage);
+ if(ad->sk)
+ {
+ sk_free(ad->sk);
+ ad->sk=NULL;
+ }
+ }
+
+/********************************************************************/
+/* API functions that defer all "state" operations to the "ex_data"
+ * implementation we have set. */
+
+/* Obtain an index for a new class (not the same as getting a new index within
+ * an existing class - this is actually getting a new *class*) */
+int CRYPTO_ex_data_new_class(void)
+ {
+ IMPL_CHECK
+ return EX_IMPL(new_class)();
+ }
+
+/* Release all "ex_data" state to prevent memory leaks. This can't be made
+ * thread-safe without overhauling a lot of stuff, and shouldn't really be
+ * called under potential race-conditions anyway (it's for program shutdown
+ * after all). */
+void CRYPTO_cleanup_all_ex_data(void)
+ {
+ IMPL_CHECK
+ EX_IMPL(cleanup)();
+ }
+
+/* Inside an existing class, get/register a new index. */
+int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
+ CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
+ CRYPTO_EX_free *free_func)
+ {
+ int ret = -1;
+
+ IMPL_CHECK
+ ret = EX_IMPL(get_new_index)(class_index,
+ argl, argp, new_func, dup_func, free_func);
+ return ret;
+ }
+
+/* Initialise a new CRYPTO_EX_DATA for use in a particular class - including
+ * calling new() callbacks for each index in the class used by this variable */
+int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
+ {
+ IMPL_CHECK
+ return EX_IMPL(new_ex_data)(class_index, obj, ad);
+ }
+
+/* Duplicate a CRYPTO_EX_DATA variable - including calling dup() callbacks for
+ * each index in the class used by this variable */
+int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
+ CRYPTO_EX_DATA *from)
+ {
+ IMPL_CHECK
+ return EX_IMPL(dup_ex_data)(class_index, to, from);
+ }
+
+/* Cleanup a CRYPTO_EX_DATA variable - including calling free() callbacks for
+ * each index in the class used by this variable */
+void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
+ {
+ IMPL_CHECK
+ EX_IMPL(free_ex_data)(class_index, obj, ad);
+ }
+
+/* For a given CRYPTO_EX_DATA variable, set the value corresponding to a
+ * particular index in the class used by this variable */