This fixes a strict aliasing issue in ui_dup_method_data.
The parameter type of CRYPTO_EX_dup's from_d parameter
is in fact void **, since it points to a pointer.
This function is rarely used, therefore fix the param type
although that may be considered an API breaking change.
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2986)
}
static int dummy_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
- void *from_d, int idx,
+ void **from_d, int idx,
long argl, void *argp)
{
return 1;
}
static int ui_dup_method_data(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
- void *from_d, int idx, long argl, void *argp)
+ void **pptr, int idx, long argl, void *argp)
{
- void **pptr = (void **)from_d;
if (*pptr != NULL)
*pptr = OPENSSL_memdup(*pptr, sizeof(struct pem_password_cb_data));
return 1;
typedef void CRYPTO_EX_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp);
typedef int CRYPTO_EX_dup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
- void *from_d, int idx, long argl, void *argp);
+ void **from_d, int idx, long argl, void *argp);
int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad)
for B<SSL>, B<SSL_SESSION>, B<EC_KEY> objects and B<BIO> chains via
BIO_dup_chain(). The B<to> and B<from> parameters
are pointers to the destination and source B<CRYPTO_EX_DATA> structures,
-respectively. The B<from_d> parameter needs to be cast to a B<void **pptr>
-as the API has currently the wrong signature; that will be changed in a
-future version. The B<*pptr> is a pointer to the source exdata.
-When the dup_func() returns, the value in B<*pptr> is copied to the
+respectively. The B<*from_d> parameter is a pointer to the source exdata.
+When the dup_func() returns, the value in B<*from_d> is copied to the
destination ex_data. If the pointer contained in B<*pptr> is not modified
by the dup_func(), then both B<to> and B<from> will point to the same data.
The B<idx>, B<argl> and B<argp> parameters are as described for the other
=head1 HISTORY
CRYPTO_alloc_ex_data() was added in OpenSSL 3.0.
+The signature of the dup_func() callback was changed in OpenSSL 3.0 to use the
+type B<void **> for B<from_d>. Previously this parameter was of type B<void *>.
=head1 COPYRIGHT
typedef void CRYPTO_EX_free (void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp);
typedef int CRYPTO_EX_dup (CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
- void *from_d, int idx, long argl, void *argp);
+ void **from_d, int idx, long argl, void *argp);
__owur int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func,
}
static int exdup(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
- void *from_d, int idx, long argl, void *argp)
+ void **from_d, int idx, long argl, void *argp)
{
if (!TEST_int_eq(idx, saved_idx)
|| !TEST_long_eq(argl, saved_argl)
}
static int exdup2(CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
- void *from_d, int idx, long argl, void *argp)
+ void **from_d, int idx, long argl, void *argp)
{
MYOBJ_EX_DATA **update_ex_data = (MYOBJ_EX_DATA**)from_d;
MYOBJ_EX_DATA *ex_data = NULL;