xref: /illumos-gate/usr/src/lib/pkcs11/pkcs11_tpm/common/apiutil.c (revision 38603a2034ae521f26661b0a6239028a83026614)
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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 	closelog();
320 	enabled = 0;
321 }
322 
323 /*ARGSUSED*/
324 void
325 logit(int type, char *fmt, ...)
326 {
327 #ifdef DEBUG
328 	va_list pvar;
329 	char buffer[BUFSIZ];
330 
331 	if (enabled) {
332 		if (type <= logging) {
333 			va_start(pvar, fmt);
334 			(void) vsnprintf(buffer, sizeof (buffer), fmt, pvar);
335 			va_end(pvar);
336 			syslog(type, buffer);
337 		}
338 	}
339 #else
340 	return;
341 #endif /* DEBUG */
342 
343 }
344 
345 void
346 AddToSessionList(pSess)
347 	Session_Struct_t *pSess;
348 {
349 	Session_Struct_t *pCur;
350 
351 	(void) pthread_mutex_lock(&(Anchor->SessListMutex));
352 
353 	pCur = Anchor->SessListBeg;
354 
355 	if (! pCur) {
356 		(void) pthread_mutex_lock(&(Anchor->ProcMutex));
357 		Anchor->SessListBeg = pSess;
358 		(void) pthread_mutex_unlock(&(Anchor->ProcMutex));
359 		pSess->Previous = pSess->Next = NULL;
360 	} else {
361 		while (pCur->Next != NULL) {
362 			pCur = pCur->Next;
363 		}
364 		pCur->Next = pSess;
365 		pSess->Previous = pCur;
366 		pSess->Next = NULL;
367 	}
368 
369 	(void) pthread_mutex_unlock(&(Anchor->SessListMutex));
370 }
371 
372 void
373 RemoveFromSessionList(pSess)
374 	Session_Struct_t *pSess;
375 {
376 	Session_Struct_t *pCur, *pTmp;
377 
378 	(void) pthread_mutex_lock(&(Anchor->SessListMutex));
379 
380 	pCur = Anchor->SessListBeg;
381 	/*
382 	 * Just in case check that there really is a list although
383 	 * the call to ValidSession should have caught this already.
384 	 * But someone may have removed the session already
385 	 * while we were validating the call.
386 	 */
387 	if (pCur) {
388 		if (pCur == pSess) {
389 			(void) pthread_mutex_lock(&(Anchor->ProcMutex));
390 			pTmp = pSess->Next;
391 			Anchor->SessListBeg = pSess->Next;
392 			if (pTmp) {
393 				pTmp->Previous = NULL;
394 			}
395 			free(pSess);
396 			(void) pthread_mutex_unlock(&(Anchor->ProcMutex));
397 			pCur = NULL;
398 		} else {
399 			/*
400 			 * First check for a Null element then check
401 			 * next against the desired element.  This will
402 			 * allow the loop to terminate at the end of
403 			 * the list even if the desired element is not in
404 			 * the list (should not happen, but be defensive).
405 			 */
406 			while (pCur && pCur->Next != pSess) {
407 				pCur = pCur->Next;
408 			}
409 			/*
410 			 * We did not hit the end of the list without finding
411 			 * our element so we can continue to remove it
412 			 */
413 			if (pCur != NULL) {
414 				pTmp = pSess->Next;
415 				pCur->Next = pTmp;
416 				if (pTmp) {
417 					pTmp->Previous = pCur;
418 				}
419 				free(pSess);
420 			}
421 		}
422 	}
423 
424 	(void) pthread_mutex_unlock(&(Anchor->SessListMutex));
425 }
426 
427 int
428 Valid_Session(Session_Struct_t *pSession, ST_SESSION_T *rSession)
429 {
430 	int rv = FALSE;
431 	Session_Struct_t  *cSessionp;
432 
433 	if (!pSession)
434 		return (FALSE);
435 
436 	(void) pthread_mutex_lock(&(Anchor->SessListMutex));
437 
438 	cSessionp = Anchor->SessListBeg;
439 	while (cSessionp) {
440 		if (cSessionp == pSession) {
441 			rv = TRUE;
442 			rSession->sessionh = pSession->RealHandle;
443 			rSession->slotID = pSession->SltId;
444 			break;
445 		}
446 		cSessionp = (Session_Struct_t *)cSessionp->Next;
447 	}
448 
449 	(void) pthread_mutex_unlock(&(Anchor->SessListMutex));
450 	return (rv);
451 }
452 
453 int
454 API_Initialized()
455 {
456 	return (Anchor != NULL && global_shm != NULL);
457 }
458 
459 void
460 Terminate_All_Process_Sessions()
461 {
462 	CK_RV rv;
463 
464 	logit(LOG_DEBUG, "Terminate_All_Process_Sessions");
465 
466 	rv = C_CloseAllSessions(TPM_SLOTID);
467 	/*
468 	 * If the return (code is not OK, we are really hosed
469 	 * since we are terminating the session.
470 	 * For now we will just log it
471 	 */
472 	if (rv != CKR_OK) {
473 		logit(LOG_DEBUG,
474 		    "Terminate_All_Process_Sessions RV %x", rv);
475 	}
476 }
477