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-rw-r--r--crypto/ex_data.c141
1 files changed, 95 insertions, 46 deletions
diff --git a/crypto/ex_data.c b/crypto/ex_data.c
index 29d8071eef..5bf8e1e5cd 100644
--- a/crypto/ex_data.c
+++ b/crypto/ex_data.c
@@ -112,48 +112,53 @@
#include <openssl/lhash.h>
-typedef struct {
+
+/*
+ * Each structure type (sometimes called a class), that supports
+ * exdata has a stack of callbacks for each instance.
+ */
+typedef struct ex_callback_st {
long argl; /* Arbitary long */
void *argp; /* Arbitary void * */
CRYPTO_EX_new *new_func;
CRYPTO_EX_free *free_func;
CRYPTO_EX_dup *dup_func;
-} CRYPTO_EX_DATA_FUNCS;
+} EX_CALLBACK;
-DECLARE_STACK_OF(CRYPTO_EX_DATA_FUNCS)
+DECLARE_STACK_OF(EX_CALLBACK)
/*
- * State for each class; could just be a typedef, but this allows future
- * changes.
+ * The state for each class. This could just be a typedef, but
+ * a structure allows future changes.
*/
-typedef struct {
- STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth;
-} EX_CLASS_ITEM;
+typedef struct ex_callbacks_st {
+ STACK_OF(EX_CALLBACK) *meth;
+} EX_CALLBACKS;
-static EX_CLASS_ITEM ex_data[CRYPTO_EX_INDEX__COUNT];
+static EX_CALLBACKS ex_data[CRYPTO_EX_INDEX__COUNT];
/*
- * Return the EX_CLASS_ITEM from the "ex_data" array that corresponds to
+ * Return the EX_CALLBACKS from the |ex_data| array that corresponds to
* a given class. On success, *holds the lock.*
*/
-static EX_CLASS_ITEM *def_get_class(int class_index)
+static EX_CALLBACKS *get_and_lock(int class_index)
{
- EX_CLASS_ITEM *ip;
+ EX_CALLBACKS *ip;
if (class_index < 0 || class_index >= CRYPTO_EX_INDEX__COUNT) {
- CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE);
+ CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
return NULL;
}
ip = &ex_data[class_index];
CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
if (ip->meth == NULL) {
- ip->meth = sk_CRYPTO_EX_DATA_FUNCS_new_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_CRYPTO_EX_DATA_FUNCS_push(ip->meth, NULL)) {
- CRYPTOerr(CRYPTO_F_DEF_GET_CLASS, ERR_R_MALLOC_FAILURE);
+ || !sk_EX_CALLBACK_push(ip->meth, NULL)) {
+ CRYPTOerr(CRYPTO_F_GET_AND_LOCK, ERR_R_MALLOC_FAILURE);
CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
return NULL;
}
@@ -161,7 +166,7 @@ static EX_CLASS_ITEM *def_get_class(int class_index)
return ip;
}
-static void cleanup_cb(CRYPTO_EX_DATA_FUNCS *funcs)
+static void cleanup_cb(EX_CALLBACK *funcs)
{
OPENSSL_free(funcs);
}
@@ -177,27 +182,71 @@ void CRYPTO_cleanup_all_ex_data(void)
int i;
for (i = 0; i < CRYPTO_EX_INDEX__COUNT; ++i) {
- EX_CLASS_ITEM *ip = &ex_data[i];
+ EX_CALLBACKS *ip = &ex_data[i];
- sk_CRYPTO_EX_DATA_FUNCS_pop_free(ip->meth, cleanup_cb);
+ sk_EX_CALLBACK_pop_free(ip->meth, cleanup_cb);
ip->meth = NULL;
}
}
+
+/*
+ * Unregister a new index by replacing the callbacks with no-ops.
+ * Any in-use instances are leaked.
+ */
+static void dummy_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
+ long argl, void *argp)
+{
+}
+
+static void dummy_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad, int idx,
+ long argl, void *argp)
+{
+}
+
+static int dummy_dup(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from,
+ void *from_d, int idx,
+ long argl, void *argp)
+{
+ return 0;
+}
+
+int CRYPTO_free_ex_index(int class_index, int idx)
+{
+ 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_w_unlock(CRYPTO_LOCK_EX_DATA);
+ return toret;
+}
+
/*
- * Inside an existing class, get/register a new index.
+ * 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 toret = -1;
- CRYPTO_EX_DATA_FUNCS *a;
- EX_CLASS_ITEM *ip = def_get_class(class_index);
+ EX_CALLBACK *a;
+ EX_CALLBACKS *ip = get_and_lock(class_index);
- if (!ip)
+ if (ip == NULL)
return -1;
- a = (CRYPTO_EX_DATA_FUNCS *)OPENSSL_malloc(sizeof(*a));
+ a = (EX_CALLBACK *)OPENSSL_malloc(sizeof(*a));
if (a == NULL) {
CRYPTOerr(CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX, ERR_R_MALLOC_FAILURE);
goto err;
@@ -208,13 +257,13 @@ int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
a->dup_func = dup_func;
a->free_func = free_func;
- if (!sk_CRYPTO_EX_DATA_FUNCS_push(ip->meth, NULL)) {
+ 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_CRYPTO_EX_DATA_FUNCS_num(ip->meth) - 1;
- (void)sk_CRYPTO_EX_DATA_FUNCS_set(ip->meth, toret, a);
+ toret = sk_EX_CALLBACK_num(ip->meth) - 1;
+ (void)sk_EX_CALLBACK_set(ip->meth, toret, a);
err:
CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
@@ -224,7 +273,7 @@ int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
/*
* 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 "CRYPTO_EX_DATA_FUNCS" entries
+ * 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.
*/
@@ -232,16 +281,16 @@ 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;
- CRYPTO_EX_DATA_FUNCS *stack[10];
- EX_CLASS_ITEM *ip = def_get_class(class_index);
+ EX_CALLBACK **storage = NULL;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACKS *ip = get_and_lock(class_index);
- if (!ip)
+ if (ip == NULL)
return 0;
ad->sk = NULL;
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
+ mx = sk_EX_CALLBACK_num(ip->meth);
if (mx > 0) {
if (mx < (int)OSSL_NELEM(stack))
storage = stack;
@@ -249,7 +298,7 @@ int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
storage = OPENSSL_malloc(sizeof(*storage) * mx);
if (storage != NULL)
for (i = 0; i < mx; i++)
- storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
+ storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
}
CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
@@ -278,17 +327,17 @@ int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
{
int mx, j, i;
char *ptr;
- CRYPTO_EX_DATA_FUNCS *stack[10];
- CRYPTO_EX_DATA_FUNCS **storage = NULL;
- EX_CLASS_ITEM *ip;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACK **storage = NULL;
+ EX_CALLBACKS *ip;
if (from->sk == NULL)
/* Nothing to copy over */
return 1;
- if ((ip = def_get_class(class_index)) == NULL)
+ if ((ip = get_and_lock(class_index)) == NULL)
return 0;
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
+ mx = sk_EX_CALLBACK_num(ip->meth);
j = sk_void_num(from->sk);
if (j < mx)
mx = j;
@@ -299,7 +348,7 @@ int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
storage = OPENSSL_malloc(sizeof(*storage) * mx);
if (storage != NULL)
for (i = 0; i < mx; i++)
- storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
+ storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
}
CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
@@ -328,15 +377,15 @@ int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
{
int mx, i;
- EX_CLASS_ITEM *ip;
+ EX_CALLBACKS *ip;
void *ptr;
- CRYPTO_EX_DATA_FUNCS *stack[10];
- CRYPTO_EX_DATA_FUNCS **storage = NULL;
+ EX_CALLBACK *stack[10];
+ EX_CALLBACK **storage = NULL;
- if ((ip = def_get_class(class_index)) == NULL)
+ if ((ip = get_and_lock(class_index)) == NULL)
return;
- mx = sk_CRYPTO_EX_DATA_FUNCS_num(ip->meth);
+ mx = sk_EX_CALLBACK_num(ip->meth);
if (mx > 0) {
if (mx < (int)OSSL_NELEM(stack))
storage = stack;
@@ -344,7 +393,7 @@ void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
storage = OPENSSL_malloc(sizeof(*storage) * mx);
if (storage != NULL)
for (i = 0; i < mx; i++)
- storage[i] = sk_CRYPTO_EX_DATA_FUNCS_value(ip->meth, i);
+ storage[i] = sk_EX_CALLBACK_value(ip->meth, i);
}
CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 06:35:34 +0100