Re: CRYPTO_set_dynlock_* mystery ... (was: Engine Issue: nShield 500)

[Massimiliano Pala]

Hi David,

that is really nice.. although.. after I gave it a try... it does not really
work :(

Actually, it seems that the dynamic functions are never called... :(

Investigating...

Later,
Max


David Schwartz wrote:

Hi all,

it seems that I am missing the usage of the set of obscure functions:

        CRYPTO_set_dynlock_create_callback()
        CRYPTO_set_dynlock_lock_callback()
        CRYPTO_set_dynlock_destroy_callback()


on how to do that by using pthreads ?

Ciao,
Max

but I have no idea how to initialize those functions - is there any example

Off the top of my head, and untested, but it should give you the idea:

struct CRYPTO_dynlock_value
{


#ifndef CRYPTO_LOCK
#define CRYPTO_LOCK     0x01
#define CRYPTO_UNLOCK   0x02
#define CRYPTO_READ     0x04
#define CRYPTO_WRITE    0x08
#endif

void locking_callback(int mode, struct CRYPTO_dynlock_value *l,
 const char *, int)
{
 if(mode==(CRYPTO_LOCK|CRYPTO_READ))
  pthread_rwlock_rdlock(&l->lock);

 else if(mode==(CRYPTO_UNLOCK|CRYPTO_READ))
  pthread_rwlock_unlock(&l->lock);
 else if(mode==(CRYPTO_UNLOCK|CRYPTO_WRITE))
  pthread_rwlock_unlock(&l->lock);
}

{
 CRYPTO_dynlock_value *l=(CRYPTO_dynlock_value *)
  malloc(sizeof(CRYPTO_dynlock_value));
 pthread_rwlock_init(&l->lock, NULL);
 return l;
}

void destroy_callback(struct CRYPTO_dynlock_value *l, const char *, int)
{
 pthread_rwlock_destroy(&l->lock);
 free(l);
}

{

}

        DS


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pthread_rwlock_t lock; }; else if(mode==(CRYPTO_LOCK|CRYPTO_WRITE)) pthread_rwlock_wrlock(&l->lock); struct CRYPTO_dynlock_value *create_callback(const char *, int) void InitDynLocks(void) CRYPTO_set_dynlock_create_callback(create_callback); CRYPTO_set_dynlock_lock_callback(locking_callback); CRYPTO_set_dynlock_destroy_callback(destroy_callback);

--

Best Regards,

        Massimiliano Pala

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