be needed in some ENGINE code, and might serve elsewhere as well.
Note that it's implemented in such a way that the locking itself is
done through the same CRYPTO_lock function as the static locks.
WARNING: This is currently experimental and untested code (it will get
tested soon, though :-)).
static ERR_STRING_DATA CRYPTO_str_functs[]=
{
{ERR_PACK(0,CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX,0), "CRYPTO_get_ex_new_index"},
+{ERR_PACK(0,CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,0), "CRYPTO_get_new_dynlockid"},
{ERR_PACK(0,CRYPTO_F_CRYPTO_GET_NEW_LOCKID,0), "CRYPTO_get_new_lockid"},
{ERR_PACK(0,CRYPTO_F_CRYPTO_SET_EX_DATA,0), "CRYPTO_set_ex_data"},
{0,NULL}
static ERR_STRING_DATA CRYPTO_str_reasons[]=
{
+{CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK ,"no dynlock create callback"},
{0,NULL}
};
#include <string.h>
#include "cryptlib.h"
#include <openssl/crypto.h>
+#include <openssl/safestack.h>
#if defined(WIN32) || defined(WIN16)
static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
#endif
+DECLARE_STACK_OF(CRYPTO_dynlock);
+IMPLEMENT_STACK_OF(CRYPTO_dynlock);
+
/* real #defines in crypto.h, keep these upto date */
static const char* lock_names[CRYPTO_NUM_LOCKS] =
{
#endif
};
+/* This is for applications to allocate new type names in the non-dynamic
+ array of lock names. These are numbered with positive numbers. */
static STACK *app_locks=NULL;
+/* For applications that want a more dynamic way of handling threads, the
+ following stack is used. These are externally numbered with negative
+ numbers. */
+static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
+
+
static void (MS_FAR *locking_callback)(int mode,int type,
const char *file,int line)=NULL;
static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
int type,const char *file,int line)=NULL;
static unsigned long (MS_FAR *id_callback)(void)=NULL;
+static CRYPTO_dynlock *(MS_FAR *dynlock_create_callback)(const char *file,
+ int line)=NULL;
+static void (MS_FAR *dynlock_locking_callback)(int mode, CRYPTO_dynlock *l,
+ const char *file,int line)=NULL;
+static void (MS_FAR *dynlock_destroy_callback)(CRYPTO_dynlock *l,
+ const char *file,int line)=NULL;
+static int (MS_FAR *add_dynlock_callback)(int *pointer,int amount,
+ CRYPTO_dynlock *l,const char *file,int line)=NULL;
+
int CRYPTO_get_new_lockid(char *name)
{
char *str;
return(0);
}
if ((str=BUF_strdup(name)) == NULL)
+ {
+ CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
return(0);
+ }
i=sk_push(app_locks,str);
if (!i)
OPENSSL_free(str);
return CRYPTO_NUM_LOCKS;
}
+int CRYPTO_get_new_dynlockid(void)
+ {
+ int i = 0;
+ CRYPTO_dynlock *pointer = NULL;
+
+ if (dynlock_create_callback == NULL)
+ {
+ CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
+ return(0);
+ }
+ if ((dyn_locks == NULL)
+ && ((dyn_locks=sk_new_null()) == NULL))
+ {
+ CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+
+ pointer = dynlock_create_callback(__FILE__,__LINE__);
+ if (pointer == NULL)
+ {
+ CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+ i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
+ if (!i)
+ dynlock_destroy_callback(pointer,__FILE__,__LINE__);
+ else
+ i += 1; /* to avoid 0 */
+ return -i;
+ }
+
+void CRYPTO_destroy_dynlockid(int i)
+ {
+ if (i)
+ i = -i-1;
+ if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
+ return;
+ if (dynlock_destroy_callback == NULL)
+ return;
+ dynlock_destroy_callback(sk_CRYPTO_dynlock_value(dyn_locks, i),
+ __FILE__,__LINE__);
+ sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
+ }
+
+CRYPTO_dynlock *CRYPTO_get_dynlock_value(int i)
+ {
+ if (i)
+ i = -i-1;
+ if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
+ return NULL;
+ return sk_CRYPTO_dynlock_value(dyn_locks, i);
+ }
+
void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
int line)
{
return(locking_callback);
}
+void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,CRYPTO_dynlock *l,
+ const char *file,int line)
+ {
+ return(dynlock_locking_callback);
+ }
+
int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
const char *file,int line)
{
return(add_lock_callback);
}
+int (*CRYPTO_get_add_dynlock_callback(void))(int *num,int mount,
+ CRYPTO_dynlock *l,
+ const char *file,int line)
+ {
+ return(add_dynlock_callback);
+ }
+
void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
const char *file,int line))
{
locking_callback=func;
}
+void CRYPTO_set_dynlock_locking_callback(void (*func)(int mode,
+ CRYPTO_dynlock *l,
+ const char *file,
+ int line))
+ {
+ dynlock_locking_callback=func;
+ }
+
void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
const char *file,int line))
{
add_lock_callback=func;
}
+void CRYPTO_set_add_dynlock_lock_callback(int (*func)(int *num,int mount,
+ CRYPTO_dynlock *l,
+ const char *file,
+ int line))
+ {
+ add_dynlock_callback=func;
+ }
+
unsigned long (*CRYPTO_get_id_callback(void))(void)
{
return(id_callback);
CRYPTO_get_lock_name(type), file, line);
}
#endif
- if (locking_callback != NULL)
- locking_callback(mode,type,file,line);
+ if (type < 0)
+ {
+ int i = -type-1;
+ if (i < sk_CRYPTO_dynlock_num(dyn_locks))
+ dynlock_locking_callback(mode,
+ sk_CRYPTO_dynlock_value(dyn_locks,i),
+ file,line);
+ }
+ else
+ if (locking_callback != NULL)
+ locking_callback(mode,type,file,line);
}
int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
int line)
{
- int ret;
+ int ret = 0;
if (add_lock_callback != NULL)
{
int before= *pointer;
#endif
- ret=add_lock_callback(pointer,amount,type,file,line);
+ if (type < 0)
+ {
+ int i = -type-1;
+ if (i >= sk_CRYPTO_dynlock_num(dyn_locks))
+ /* FIXME: This is superbly dangerous if there
+ are threads competing on this value, but
+ hey, if the user used an invalid lock... */
+ ret=(*pointer + amount);
+ else
+ ret=add_dynlock_callback(pointer,amount,
+ sk_CRYPTO_dynlock_value(dyn_locks,i),
+ file,line);
+ }
+ else
+ ret=add_lock_callback(pointer,amount,type,file,line);
#ifdef LOCK_DEBUG
fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
CRYPTO_thread_id(),
const char *CRYPTO_get_lock_name(int type)
{
if (type < 0)
- return("ERROR");
+ return("dynamic");
else if (type < CRYPTO_NUM_LOCKS)
return(lock_names[type]);
else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
#define CRYPTO_add(a,b,c) ((*(a))+=(b))
#endif
+/* Some applications as well as some parts of OpenSSL need to allocate
+ and deallocate locks in a dynamic fashion. The following typedef
+ makes this possible in a type-safe manner. */
+typedef struct CRYPTO_dynlock_value CRYPTO_dynlock;
+
+
/* The following can be used to detect memory leaks in the SSLeay library.
* It used, it turns on malloc checking */
const char *CRYPTO_get_lock_name(int type);
int CRYPTO_add_lock(int *pointer,int amount,int type, const char *file,
int line);
+void CRYPTO_set_dynlock_create_callback(CRYPTO_dynlock *(*dyn_create_function)
+ (char *file, int line));
+void CRYPTO_set_dynlock_lock_callback(void (*dyn_lock_function)
+ (int mode, CRYPTO_dynlock *l, const char *file, int line));
+void CRYPTO_set_dynlock_destroy_callback(void (*dyn_destroy_function)
+ (CRYPTO_dynlock *l, const char *file, int line));
+void CRYPTO_set_dynlock_size(int dynlock_size);
+int CRYPTO_get_new_dynlockid(void);
+void CRYPTO_destroy_dynlockid(int i);
+CRYPTO_dynlock *CRYPTO_get_dynlock_value(int i);
/* CRYPTO_set_mem_functions includes CRYPTO_set_locked_mem_functions --
* call the latter last if you need different functions */
/* Function codes. */
#define CRYPTO_F_CRYPTO_GET_EX_NEW_INDEX 100
+#define CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID 103
#define CRYPTO_F_CRYPTO_GET_NEW_LOCKID 101
#define CRYPTO_F_CRYPTO_SET_EX_DATA 102
/* Reason codes. */
+#define CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK 100
#ifdef __cplusplus
}
#endif
#endif
+
#endif
/* This block of defines is updated by util/mkstack.pl, please do not touch! */
+#define sk_CRYPTO_dynlock_new(st) SKM_sk_new(CRYPTO_dynlock, (st))
+#define sk_CRYPTO_dynlock_new_null() SKM_sk_new_null(CRYPTO_dynlock)
+#define sk_CRYPTO_dynlock_free(st) SKM_sk_free(CRYPTO_dynlock, (st))
+#define sk_CRYPTO_dynlock_num(st) SKM_sk_num(CRYPTO_dynlock, (st))
+#define sk_CRYPTO_dynlock_value(st, i) SKM_sk_value(CRYPTO_dynlock, (st), (i))
+#define sk_CRYPTO_dynlock_set(st, i, val) SKM_sk_set(CRYPTO_dynlock, (st), (i), (val))
+#define sk_CRYPTO_dynlock_zero(st) SKM_sk_zero(CRYPTO_dynlock, (st))
+#define sk_CRYPTO_dynlock_push(st, val) SKM_sk_push(CRYPTO_dynlock, (st), (val))
+#define sk_CRYPTO_dynlock_unshift(st, val) SKM_sk_unshift(CRYPTO_dynlock, (st), (val))
+#define sk_CRYPTO_dynlock_find(st, val) SKM_sk_find(CRYPTO_dynlock, (st), (val))
+#define sk_CRYPTO_dynlock_delete(st, i) SKM_sk_delete(CRYPTO_dynlock, (st), (i))
+#define sk_CRYPTO_dynlock_delete_ptr(st, ptr) SKM_sk_delete_ptr(CRYPTO_dynlock, (st), (ptr))
+#define sk_CRYPTO_dynlock_insert(st, val, i) SKM_sk_insert(CRYPTO_dynlock, (st), (val), (i))
+#define sk_CRYPTO_dynlock_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(CRYPTO_dynlock, (st), (cmp))
+#define sk_CRYPTO_dynlock_dup(st) SKM_sk_dup(CRYPTO_dynlock, st)
+#define sk_CRYPTO_dynlock_pop_free(st, free_func) SKM_sk_pop_free(CRYPTO_dynlock, (st), (free_func))
+#define sk_CRYPTO_dynlock_shift(st) SKM_sk_shift(CRYPTO_dynlock, (st))
+#define sk_CRYPTO_dynlock_pop(st) SKM_sk_pop(CRYPTO_dynlock, (st))
+#define sk_CRYPTO_dynlock_sort(st) SKM_sk_sort(CRYPTO_dynlock, (st))
+
#define sk_CRYPTO_EX_DATA_FUNCS_new(st) SKM_sk_new(CRYPTO_EX_DATA_FUNCS, (st))
#define sk_CRYPTO_EX_DATA_FUNCS_new_null() SKM_sk_new_null(CRYPTO_EX_DATA_FUNCS)
#define sk_CRYPTO_EX_DATA_FUNCS_free(st) SKM_sk_free(CRYPTO_EX_DATA_FUNCS, (st))
int CRYPTO_num_locks(void);
+
+ /* struct CRYPTO_dynlock_value needs to be defined by the user */
+ typedef struct CRYPTO_dynlock_value CRYPTO_dynlock;
+
+ void CRYPTO_set_dynlock_create_callback(CRYPTO_dynlock *(*dyn_create_function)
+ (char *file, int line));
+ void CRYPTO_set_dynlock_lock_callback(void (*dyn_lock_function)
+ (int mode, CRYPTO_dynlock *l, const char *file, int line));
+ void CRYPTO_set_dynlock_destroy_callback(void (*dyn_destroy_function)
+ (CRYPTO_dynlock *l, const char *file, int line));
+
+ int CRYPTO_get_new_dynlockid(void);
+
+ void CRYPTO_destroy_dynlockid(int i);
+
+ void CRYPTO_lock(int mode, int n, const char *file, int line);
+
=head1 DESCRIPTION
OpenSSL can safely be used in multi-threaded applications provided
-that two callback functions are set.
+that at least two callback functions are set.
locking_function(int mode, int n, const char *file, int line) is
needed to perform locking on shared data stuctures. Multi-threaded
needed on Windows nor on platforms where getpid() returns a different
ID for each thread (most notably Linux).
+Additionally, OpenSSL supports dynamic locks, and sometimes, some parts
+of OpenSSL need it for better performance. To enable this, the following
+is required:
+
+=item *
+Three additional callback function, dyn_create_function, dyn_lock_function
+and dyn_destroy_function.
+
+=item *
+A structure defined with the data that each lock needs to handle.
+
+struct CRYPTO_dynlock_value has to be defined to contain whatever structure
+is needed to handle locks.
+
+dyn_create_function(const char *file, int line) is needed to create a
+lock. Multi-threaded applications might crash at random if it is not set.
+
+dyn_lock_function(int mode, CRYPTO_dynlock *l, const char *file, int line)
+is needed to perform locking off dynamic lock nunmbered n. Multi-threaded
+applications might crash at random if it is not set.
+
+dyn_destroy_function(CRYPTO_dynlock *l, const char *file, int line) is
+needed to destroy the lock l. Multi-threaded applications might crash at
+random if it is not set.
+
+CRYPTO_get_new_dynlockid() is used to create locks. It will call
+dyn_create_function for the actual creation.
+
+CRYPTO_destroy_dynlockid() is used to destroy locks. It will call
+dyn_destroy_function for the actual destruction.
+
+CRYPTO_lock() is used to lock and unlock the locks. mode is a bitfield
+describing what should be done with the lock. n is the number of the
+lock as returned from CRYPTO_get_new_dynlockid(). mode can be combined
+from the following values. These values are pairwise exclusive, with
+undefined behavior if misused (for example, CRYPTO_READ and CRYPTO_WRITE
+should not be used together):
+
+ CRYPTO_LOCK 0x01
+ CRYPTO_UNLOCK 0x02
+ CRYPTO_READ 0x04
+ CRYPTO_WRITE 0x08
+
=head1 RETURN VALUES
CRYPTO_num_locks() returns the required number of locks.
+
+CRYPTO_get_new_dynlockid() returns the index to the newly created lock.
+
The other functions return no values.
=head1 NOTE
CRYPTO_set_locking_callback() and CRYPTO_set_id_callback() are
available in all versions of SSLeay and OpenSSL.
CRYPTO_num_locks() was added in OpenSSL 0.9.4.
+All functions dealing with dynamic locks were added in OpenSSL 0.9.5b-dev.
=head1 SEE ALSO
d2i_RSA_NET_2 2407
d2i_RSA_NET 2408
DSO_bind_func 2409
+CRYPTO_get_new_dynlockid 2410
+sk_new_null 2411
+CRYPTO_set_dynlock_destroy_callback 2412
+CRYPTO_destroy_dynlockid 2413
+CRYPTO_set_dynlock_size 2414
+CRYPTO_set_dynlock_create_callback 2415
+CRYPTO_set_dynlock_lock_callback 2416
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