xref: /titanic_44/usr/src/lib/pkcs11/pkcs11_tpm/common/apiutil.c (revision 0a1ad920531b37f01f4aa8084737026621c76bdb)
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288  */
289 /*
290  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
291  * Use is subject to license terms.
292  */
293 
294 #include <alloca.h>
295 #include <libgen.h>
296 #include <sys/varargs.h>
297 
298 #include "tpmtok_int.h"
299 
300 extern  API_Proc_Struct_t  *Anchor;
301 extern int logging;
302 
303 void logit(int, char *, ...);
304 static int enabled = 0;
305 
306 void
307 loginit() {
308 	if (!enabled) {
309 		enabled = 1;
310 		openlog("tpmtoken", LOG_PID | LOG_NDELAY, LOG_DAEMON);
311 		(void) setlogmask(LOG_UPTO(LOG_DEBUG));
312 		logit(LOG_DEBUG, "Logging enabled %d enabled", enabled);
313 	}
314 }
315 
316 void
317 logterm()
318 {
319 	enabled = 0;
320 }
321 
322 /*ARGSUSED*/
323 void
324 logit(int type, char *fmt, ...)
325 {
326 #ifdef DEBUG
327 	va_list pvar;
328 	char buffer[BUFSIZ];
329 
330 	if (enabled) {
331 		if (type <= logging) {
332 			va_start(pvar, fmt);
333 			(void) vsnprintf(buffer, sizeof (buffer), fmt, pvar);
334 			va_end(pvar);
335 			syslog(type, buffer);
336 		}
337 	}
338 #else
339 	return;
340 #endif /* DEBUG */
341 
342 }
343 
344 void
345 AddToSessionList(pSess)
346 	Session_Struct_t *pSess;
347 {
348 	Session_Struct_t *pCur;
349 
350 	(void) pthread_mutex_lock(&(Anchor->SessListMutex));
351 
352 	pCur = Anchor->SessListBeg;
353 
354 	if (! pCur) {
355 		(void) pthread_mutex_lock(&(Anchor->ProcMutex));
356 		Anchor->SessListBeg = pSess;
357 		(void) pthread_mutex_unlock(&(Anchor->ProcMutex));
358 		pSess->Previous = pSess->Next = NULL;
359 	} else {
360 		while (pCur->Next != NULL) {
361 			pCur = pCur->Next;
362 		}
363 		pCur->Next = pSess;
364 		pSess->Previous = pCur;
365 		pSess->Next = NULL;
366 	}
367 
368 	(void) pthread_mutex_unlock(&(Anchor->SessListMutex));
369 }
370 
371 void
372 RemoveFromSessionList(pSess)
373 	Session_Struct_t *pSess;
374 {
375 	Session_Struct_t *pCur, *pTmp;
376 
377 	(void) pthread_mutex_lock(&(Anchor->SessListMutex));
378 
379 	pCur = Anchor->SessListBeg;
380 	/*
381 	 * Just in case check that there really is a list although
382 	 * the call to ValidSession should have caught this already.
383 	 * But someone may have removed the session already
384 	 * while we were validating the call.
385 	 */
386 	if (pCur) {
387 		if (pCur == pSess) {
388 			(void) pthread_mutex_lock(&(Anchor->ProcMutex));
389 			pTmp = pSess->Next;
390 			Anchor->SessListBeg = pSess->Next;
391 			if (pTmp) {
392 				pTmp->Previous = NULL;
393 			}
394 			free(pSess);
395 			(void) pthread_mutex_unlock(&(Anchor->ProcMutex));
396 			pCur = NULL;
397 		} else {
398 			/*
399 			 * First check for a Null element then check
400 			 * next against the desired element.  This will
401 			 * allow the loop to terminate at the end of
402 			 * the list even if the desired element is not in
403 			 * the list (should not happen, but be defensive).
404 			 */
405 			while (pCur && pCur->Next != pSess) {
406 				pCur = pCur->Next;
407 			}
408 			/*
409 			 * We did not hit the end of the list without finding
410 			 * our element so we can continue to remove it
411 			 */
412 			if (pCur != NULL) {
413 				pTmp = pSess->Next;
414 				pCur->Next = pTmp;
415 				if (pTmp) {
416 					pTmp->Previous = pCur;
417 				}
418 				free(pSess);
419 			}
420 		}
421 	}
422 
423 	(void) pthread_mutex_unlock(&(Anchor->SessListMutex));
424 }
425 
426 int
427 Valid_Session(Session_Struct_t *pSession, ST_SESSION_T *rSession)
428 {
429 	int rv = FALSE;
430 	Session_Struct_t  *cSessionp;
431 
432 	if (! pSession)
433 	return (FALSE);
434 
435 	(void) pthread_mutex_lock(&(Anchor->SessListMutex));
436 
437 	cSessionp = Anchor->SessListBeg;
438 	while (cSessionp) {
439 		if (cSessionp == pSession) {
440 			rv = TRUE;
441 			rSession->sessionh = pSession->RealHandle;
442 			rSession->slotID = pSession->SltId;
443 			break;
444 		}
445 		cSessionp = (Session_Struct_t *)cSessionp->Next;
446 	}
447 
448 	(void) pthread_mutex_unlock(&(Anchor->SessListMutex));
449 	return (rv);
450 }
451 
452 int
453 API_Initialized()
454 {
455 	return (Anchor != NULL);
456 }
457 
458 void
459 Terminate_All_Process_Sessions()
460 {
461 	CK_RV rv;
462 
463 	logit(LOG_DEBUG, "Terminate_All_Process_Sessions");
464 
465 	rv = C_CloseAllSessions(TPM_SLOTID);
466 	/*
467 	 * If the return (code is not OK, we are really hosed
468 	 * since we are terminating the session.
469 	 * For now we will just log it
470 	 */
471 	if (rv != CKR_OK) {
472 		logit(LOG_DEBUG,
473 		    "Terminate_All_Process_Sessions RV %x", rv);
474 	}
475 }
476