-/* crypto/ex_data.c */
-
-/*
- * Overhaul notes;
- *
- * This code is now *mostly* thread-safe. It is now easier to understand in what
- * ways it is safe and in what ways it is not, which is an improvement. Firstly,
- * all per-class stacks and index-counters for ex_data are stored in the same
- * global LHASH table (keyed by class). This hash table uses locking for all
- * access with the exception of CRYPTO_cleanup_all_ex_data(), which must only be
- * called when no other threads can possibly race against it (even if it was
- * locked, the race would mean it's possible the hash table might have been
- * recreated after the cleanup). As classes can only be added to the hash table,
- * and within each class, the stack of methods can only be incremented, the
- * locking mechanics are simpler than they would otherwise be. For example, the
- * new/dup/free ex_data functions will lock the hash table, copy the method
- * pointers it needs from the relevant class, then unlock the hash table before
- * actually applying those method pointers to the task of the new/dup/free
- * operations. As they can't be removed from the method-stack, only
- * supplemented, there's no race conditions associated with using them outside
- * the lock. The get/set_ex_data functions are not locked because they do not
- * involve this global state at all - they operate directly with a previously
- * obtained per-class method index and a particular "ex_data" variable. These
- * variables are usually instantiated per-context (eg. each RSA structure has
- * one) so locking on read/write access to that variable can be locked locally
- * if required (eg. using the "RSA" lock to synchronise access to a
- * per-RSA-structure ex_data variable if required).
- * [Geoff]
- */
-
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
*
*/
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
+#include "internal/threads.h"
#include <openssl/lhash.h>
-/* What an "implementation of ex_data functionality" looks like */
-struct st_CRYPTO_EX_DATA_IMPL {
- /*********************/
- /* GLOBAL OPERATIONS */
- /* Return a new class index */
- int (*cb_new_class) (void);
- /* Cleanup all state used by the implementation */
- void (*cb_cleanup) (void);
- /************************/
- /* PER-CLASS OPERATIONS */
- /* Get a new method index within a class */
- int (*cb_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);
- /* Initialise a new CRYPTO_EX_DATA of a given class */
- int (*cb_new_ex_data) (int class_index, void *obj, CRYPTO_EX_DATA *ad);
- /* Duplicate a CRYPTO_EX_DATA of a given class onto a copy */
- int (*cb_dup_ex_data) (int class_index, CRYPTO_EX_DATA *to,
- CRYPTO_EX_DATA *from);
- /* Cleanup a CRYPTO_EX_DATA of a given class */
- void (*cb_free_ex_data) (int class_index, void *obj, CRYPTO_EX_DATA *ad);
-};
-
-/* The implementation we use at run-time */
-static const CRYPTO_EX_DATA_IMPL *impl = NULL;
-
/*
- * To call "impl" functions, use this macro rather than referring to 'impl'
- * directly, eg. EX_IMPL(get_new_index)(...);
+ * Each structure type (sometimes called a class), that supports
+ * exdata has a stack of callbacks for each instance.
*/
-#define EX_IMPL(a) impl->cb_##a
-
-/* Predeclare the "default" ex_data implementation */
-static int int_new_class(void);
-static void int_cleanup(void);
-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);
-static int int_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
-static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
- CRYPTO_EX_DATA *from);
-static void int_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
-static CRYPTO_EX_DATA_IMPL impl_default = {
- int_new_class,
- int_cleanup,
- int_get_new_index,
- int_new_ex_data,
- int_dup_ex_data,
- int_free_ex_data
+struct ex_callback_st {
+ long argl; /* Arbitrary long */
+ void *argp; /* Arbitrary void * */
+ CRYPTO_EX_new *new_func;
+ CRYPTO_EX_free *free_func;
+ CRYPTO_EX_dup *dup_func;
};
/*
- * Internal function that checks whether "impl" is set and if not, sets it to
- * the default.
+ * The state for each class. This could just be a typedef, but
+ * a structure allows future changes.
*/
-static void impl_check(void)
+typedef struct ex_callbacks_st {
+ STACK_OF(EX_CALLBACK) *meth;
+} EX_CALLBACKS;
+
+static EX_CALLBACKS ex_data[CRYPTO_EX_INDEX__COUNT];
+
+static CRYPTO_RWLOCK *ex_data_lock;
+static CRYPTO_ONCE ex_data_init = CRYPTO_ONCE_STATIC_INIT;
+
+static void do_ex_data_init(void)
{
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- if (!impl)
- impl = &impl_default;
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
+ CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
+ ex_data_lock = CRYPTO_THREAD_lock_new();
+ CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
}
/*
- * A macro wrapper for impl_check that first uses a non-locked test before
- * invoking the function (which checks again inside a lock).
+ * Return the EX_CALLBACKS from the |ex_data| array that corresponds to
+ * a given class. On success, *holds the lock.*
*/
-#define IMPL_CHECK if(!impl) impl_check();
-
-/* API functions to get/set the "ex_data" implementation */
-const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void)
+static EX_CALLBACKS *get_and_lock(int class_index)
{
- IMPL_CHECK return impl;
-}
+ EX_CALLBACKS *ip;
-int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i)
-{
- int toret = 0;
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- if (!impl) {
- impl = i;
- toret = 1;
+ if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) {
+ CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
+ return NULL;
}
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return toret;
+
+ CRYPTO_THREAD_run_once(&ex_data_init, do_ex_data_init);
+
+ ip = &ex_data[class_index];
+ CRYPTO_THREAD_write_lock(ex_data_lock);
+ if (ip->meth == NULL) {
+ ip->meth = sk_EX_CALLBACK_new_null();
+ /* We push an initial value on the stack because the SSL
+ * "app_data" routines use ex_data index zero. See RT 3710. */
+ if (ip->meth == NULL
+ || !sk_EX_CALLBACK_push(ip->meth, NULL)) {
+ CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
+ CRYPTO_THREAD_unlock(ex_data_lock);
+ return NULL;
+ }
+ }
+ return ip;
}
-/****************************************************************************/
-/*
- * Interal (default) implementation of "ex_data" support. API functions are
- * further down.
- */
+static void cleanup_cb(EX_CALLBACK *funcs)
+{
+ OPENSSL_free(funcs);
+}
/*
- * The type that represents what each "class" used to implement locally. A
- * STACK of CRYPTO_EX_DATA_FUNCS plus a index-counter. The 'class_index' is
- * the global value representing the class that is used to distinguish these
- * items.
+ * 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).
*/
-typedef struct st_ex_class_item {
- int class_index;
- STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth;
- int meth_num;
-} EX_CLASS_ITEM;
-
-/* When assigning new class indexes, this is our counter */
-static int ex_class = CRYPTO_EX_INDEX_USER;
-
-/* The global hash table of EX_CLASS_ITEM items */
-DECLARE_LHASH_OF(EX_CLASS_ITEM);
-static LHASH_OF(EX_CLASS_ITEM) *ex_data = NULL;
-
-/* The callbacks required in the "ex_data" hash table */
-static unsigned long ex_class_item_hash(const EX_CLASS_ITEM *a)
+void CRYPTO_cleanup_all_ex_data(void)
{
- return a->class_index;
-}
+ int i;
-static IMPLEMENT_LHASH_HASH_FN(ex_class_item, EX_CLASS_ITEM)
+ for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) {
+ EX_CALLBACKS *ip = &ex_data[i];
-static int ex_class_item_cmp(const EX_CLASS_ITEM *a, const EX_CLASS_ITEM *b)
-{
- return a->class_index - b->class_index;
+ sk_EX_CALLBACK_pop_free(ip->meth, cleanup_cb);
+ ip->meth = NULL;
+ }
}
-static IMPLEMENT_LHASH_COMP_FN(ex_class_item, EX_CLASS_ITEM)
/*
- * Internal functions used by the "impl_default" implementation to access the
- * state
+ * Unregister a new index by replacing the callbacks with no-ops.
+ * Any in-use instances are leaked.
*/
-static int ex_data_check(void)
+static void dummy_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
+ long argl, void *argp)
{
- int toret = 1;
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- if (!ex_data && (ex_data = lh_EX_CLASS_ITEM_new()) == NULL)
- toret = 0;
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
- return toret;
}
-/*
- * This macros helps reduce the locking from repeated checks because the
- * ex_data_check() function checks ex_data again inside a lock.
- */
-#define EX_DATA_CHECK(iffail) if(!ex_data && !ex_data_check()) {iffail}
-
-/* This "inner" callback is used by the callback function that follows it */
-static void def_cleanup_util_cb(CRYPTO_EX_DATA_FUNCS *funcs)
+static void dummy_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
+ long argl, void *argp)
{
- OPENSSL_free(funcs);
}
-/*
- * This callback is used in lh_doall to destroy all EX_CLASS_ITEM values from
- * "ex_data" prior to the ex_data hash table being itself destroyed. Doesn't
- * do any locking.
- */
-static void def_cleanup_cb(void *a_void)
+static int dummy_dup(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from,
+ void *from_d, int idx,
+ long argl, void *argp)
{
- EX_CLASS_ITEM *item = (EX_CLASS_ITEM *)a_void;
- sk_CRYPTO_EX_DATA_FUNCS_pop_free(item->meth, def_cleanup_util_cb);
- OPENSSL_free(item);
+ return 0;
}
-/*
- * Return the EX_CLASS_ITEM from the "ex_data" hash table that corresponds to
- * a given class. Handles locking.
- */
-static EX_CLASS_ITEM *def_get_class(int class_index)
+int CRYPTO_free_ex_index(int class_index, int idx)
{
- 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_EX_CLASS_ITEM_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
- */
- (void)lh_EX_CLASS_ITEM_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;
+ EX_CALLBACKS *ip = get_and_lock(class_index);
+ EX_CALLBACK *a;
+ int toret = 0;
+
+ if (ip == NULL)
+ return 0;
+ if (idx < 0 || idx >= sk_EX_CALLBACK_num(ip->meth))
+ goto err;
+ a = sk_EX_CALLBACK_value(ip->meth, idx);
+ if (a == NULL)
+ goto err;
+ a->new_func = dummy_new;
+ a->dup_func = dummy_dup;
+ a->free_func = dummy_free;
+ toret = 1;
+err:
+ CRYPTO_THREAD_unlock(ex_data_lock);
+ return toret;
}
/*
- * Add a new method to the given EX_CLASS_ITEM and return the corresponding
- * index (or -1 for error). Handles locking.
+ * Register a new index.
*/
-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 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 toret = -1;
- CRYPTO_EX_DATA_FUNCS *a = OPENSSL_malloc(sizeof(CRYPTO_EX_DATA_FUNCS));
- if (!a) {
- CRYPTOerr(CRYPTO_F_DEF_ADD_INDEX, ERR_R_MALLOC_FAILURE);
+ EX_CALLBACK *a;
+ EX_CALLBACKS *ip = get_and_lock(class_index);
+
+ if (ip == NULL)
return -1;
+ a = (EX_CALLBACK *)OPENSSL_malloc(sizeof(*a));
+ if (a == NULL) {
+ CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
+ goto err;
}
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++;
- (void)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 */
+ if (!sk_EX_CALLBACK_push(ip->meth, NULL)) {
+ CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
+ OPENSSL_free(a);
+ goto err;
+ }
+ toret = sk_EX_CALLBACK_num(ip->meth) - 1;
+ (void)sk_EX_CALLBACK_set(ip->meth, toret, a);
-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);
+ err:
+ CRYPTO_THREAD_unlock(ex_data_lock);
return toret;
}
-static void int_cleanup(void)
-{
- EX_DATA_CHECK(return;)
- lh_EX_CLASS_ITEM_doall(ex_data, def_cleanup_cb);
- lh_EX_CLASS_ITEM_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.
+ * 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
+ * Thread-safe by copying a class's array of "EX_CALLBACK" entries
+ * in the lock, then using them outside the lock. Note this only applies
+ * to the global "ex_data" state (ie. class definitions), not 'ad' itself.
*/
-static int int_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
+int CRYPTO_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 */
+ EX_CALLBACK **storage = NULL;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACKS *ip = get_and_lock(class_index);
+
+ if (ip == NULL)
return 0;
+
ad->sk = NULL;
- CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
+
+ mx = sk_EX_CALLBACK_num(ip->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);
+ if (mx < (int)OSSL_NELEM(stack))
+ storage = stack;
+ else
+ storage = OPENSSL_malloc(sizeof(*storage) * mx);
+ if (storage != NULL)
+ for (i = 0; i < mx; i++)
+ storage[i] = sk_EX_CALLBACK_value(ip->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);
+ CRYPTO_THREAD_unlock(ex_data_lock);
+
+ if (mx > 0 && storage == NULL) {
+ CRYPTOerr(CRYPTO_F_CRYPTO_NEW_EX_DATA, ERR_R_MALLOC_FAILURE);
return 0;
}
for (i = 0; i < mx; i++) {
storage[i]->argl, storage[i]->argp);
}
}
- OPENSSL_free(storage);
+ if (storage != stack)
+ 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)
+/*
+ * 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)
{
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' */
+ EX_CALLBACK *stack[10];
+ EX_CALLBACK **storage = NULL;
+ EX_CALLBACKS *ip;
+
+ if (from->sk == NULL)
+ /* Nothing to copy over */
return 1;
- if ((item = def_get_class(class_index)) == NULL)
+ if ((ip = get_and_lock(class_index)) == NULL)
return 0;
- CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
+
+ mx = sk_EX_CALLBACK_num(ip->meth);
j = sk_void_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);
+ if (mx < (int)OSSL_NELEM(stack))
+ storage = stack;
+ else
+ storage = OPENSSL_malloc(sizeof(*storage) * mx);
+ if (storage != NULL)
+ for (i = 0; i < mx; i++)
+ storage[i] = sk_EX_CALLBACK_value(ip->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);
+ CRYPTO_THREAD_unlock(ex_data_lock);
+
+ if (mx > 0 && storage == NULL) {
+ CRYPTOerr(CRYPTO_F_CRYPTO_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]->argl, storage[i]->argp);
CRYPTO_set_ex_data(to, i, ptr);
}
- OPENSSL_free(storage);
+ if (storage != stack)
+ 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)
+
+/*
+ * 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)
{
int mx, i;
- EX_CLASS_ITEM *item;
+ EX_CALLBACKS *ip;
void *ptr;
- CRYPTO_EX_DATA_FUNCS **storage = NULL;
- if (ex_data == NULL)
- return;
- if ((item = def_get_class(class_index)) == NULL)
+ EX_CALLBACK *stack[10];
+ EX_CALLBACK **storage = NULL;
+
+ if ((ip = get_and_lock(class_index)) == NULL)
return;
- CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA);
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(item->meth);
+
+ mx = sk_EX_CALLBACK_num(ip->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);
+ if (mx < (int)OSSL_NELEM(stack))
+ storage = stack;
+ else
+ storage = OPENSSL_malloc(sizeof(*storage) * mx);
+ if (storage != NULL)
+ for (i = 0; i < mx; i++)
+ storage[i] = sk_EX_CALLBACK_value(ip->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);
+ CRYPTO_THREAD_unlock(ex_data_lock);
+
+ if (mx > 0 && storage == NULL) {
+ CRYPTOerr(CRYPTO_F_CRYPTO_FREE_EX_DATA, ERR_R_MALLOC_FAILURE);
return;
}
for (i = 0; i < mx; i++) {
storage[i]->argl, storage[i]->argp);
}
}
- OPENSSL_free(storage);
- if (ad->sk) {
- sk_void_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);
+ if (storage != stack)
+ OPENSSL_free(storage);
+ sk_void_free(ad->sk);
+ ad->sk = NULL;
}
/*
if (ad->sk == NULL) {
if ((ad->sk = sk_void_new_null()) == NULL) {
CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
- return (0);
+ return 0;
}
}
- i = sk_void_num(ad->sk);
- while (i <= idx) {
+ for (i = sk_void_num(ad->sk); i <= idx; ++i) {
if (!sk_void_push(ad->sk, NULL)) {
CRYPTOerr(CRYPTO_F_CRYPTO_SET_EX_DATA, ERR_R_MALLOC_FAILURE);
- return (0);
+ return 0;
}
- i++;
}
sk_void_set(ad->sk, idx, val);
- return (1);
+ return 1;
}
/*
*/
void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx)
{
- if (ad->sk == NULL)
- return (0);
- else if (idx >= sk_void_num(ad->sk))
- return (0);
- else
- return (sk_void_value(ad->sk, idx));
+ if (ad->sk == NULL || idx >= sk_void_num(ad->sk))
+ return NULL;
+ return sk_void_value(ad->sk, idx);
}
projects / openssl.git / blobdiff