- {
- EX_CLASS_ITEM d, *p, *gen;
- EX_DATA_CHECK(return NULL;)
- d.class_index = class_index;
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- p = lh_retrieve(ex_data, &d);
- if(!p)
- {
- gen = OPENSSL_malloc(sizeof(EX_CLASS_ITEM));
- if(gen)
- {
- gen->class_index = class_index;
- gen->meth_num = 0;
- gen->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null();
- if(!gen->meth)
- OPENSSL_free(gen);
- else
- {
- /* Because we're inside the ex_data lock, the
- * return value from the insert will be NULL */
- lh_insert(ex_data, gen);
- p = gen;
- }
- }
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- if(!p)
- CRYPTOerr(CRYPTO_F_DEF_GET_CLASS,ERR_R_MALLOC_FAILURE);
- return p;
- }
-
-/* Add a new method to the given EX_CLASS_ITEM and return the corresponding
- * index (or -1 for error). Handles locking. */
-static int def_add_index(EX_CLASS_ITEM *item, long argl, void *argp,
- CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
- CRYPTO_EX_free *free_func)
- {
- int toret = -1;
- CRYPTO_EX_DATA_FUNCS *a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc(
- sizeof(CRYPTO_EX_DATA_FUNCS));
- if(!a)
- {
- CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE);
- return -1;
- }
- a->argl=argl;
- a->argp=argp;
- a->new_func=new_func;
- a->dup_func=dup_func;
- a->free_func=free_func;
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- while (sk_CRYPTO_EX_DATA_FUNCS_num(item->meth) <= item->meth_num)
- {
- if (!sk_CRYPTO_EX_DATA_FUNCS_push(item->meth, NULL))
- {
- CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX,ERR_R_MALLOC_FAILURE);
- OPENSSL_free(a);
- goto err;
- }
- }
- toret = item->meth_num++;
- sk_CRYPTO_EX_DATA_FUNCS_set(item->meth, toret, a);
-err:
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return toret;
- }
-
-/**************************************************************/
-/* The functions in the default CRYPTO_EX_DATA_IMPL structure */
-
-static int int_new_class(void)
- {
- int toret;
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- toret = ex_class++;
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return toret;
- }
-
-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