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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <pthread.h>
     30 #include <stdlib.h>
     31 #include <security/cryptoki.h>
     32 #include "pkcs11Global.h"
     33 #include "pkcs11Slot.h"
     34 #include "pkcs11Session.h"
     35 
     36 
     37 /*
     38  * pkcs11_session_add:
     39  * Create a session and add it to the list of sessions associated
     40  * with the slot it is being opened on.  The session handle, fwsessionp,
     41  * will be the memory address of the session, typecast to a CK_SESSION_HANDLE.
     42  *
     43  * Assumptions: slotp is a valid slot, mutexes are not held, and
     44  * the provider already successfully opened related session.
     45  */
     46 CK_RV
     47 pkcs11_session_add(pkcs11_slot_t *slotp, CK_SLOT_ID slot_id,
     48     CK_SESSION_HANDLE_PTR fwsessionp, CK_SESSION_HANDLE prov_sess)
     49 {
     50 
     51 	pkcs11_session_t *newhandle = malloc(sizeof (pkcs11_session_t));
     52 
     53 	if (newhandle == NULL) {
     54 		return (CKR_HOST_MEMORY);
     55 	}
     56 
     57 	newhandle->se_magic = PKCS11_SESSION_MAGIC;
     58 	newhandle->se_handle = prov_sess;
     59 	newhandle->se_slotid = slot_id;
     60 
     61 	(void) pthread_mutex_lock(&slotp->sl_mutex);
     62 
     63 	/* Insert the new session in the front of the slot's session list */
     64 	if (slotp->sl_sess_list == NULL) {
     65 		slotp->sl_sess_list = newhandle;
     66 		newhandle->se_prev = NULL;
     67 		newhandle->se_next = NULL;
     68 	} else {
     69 		slotp->sl_sess_list->se_prev = newhandle;
     70 		newhandle->se_next = slotp->sl_sess_list;
     71 		newhandle->se_prev = NULL;
     72 		slotp->sl_sess_list = newhandle;
     73 	}
     74 
     75 	/* Typecast the address of session structure to a session handle */
     76 	*fwsessionp = (CK_SESSION_HANDLE)newhandle;
     77 
     78 	(void) pthread_mutex_unlock(&slotp->sl_mutex);
     79 
     80 	return (CKR_OK);
     81 }
     82 
     83 /*
     84  * pkcs11_session_delete:
     85  * Delete a session from a particular slot's session list.
     86  *
     87  * Assumptions: slotp is a valid slot, sessp is a valid session,
     88  * provider has already successfully closed this session, and
     89  * mutexes are not held.
     90  */
     91 void
     92 pkcs11_session_delete(pkcs11_slot_t *slotp, pkcs11_session_t *sessp)
     93 {
     94 
     95 	/* Acquire the slot's lock */
     96 	(void) pthread_mutex_lock(&slotp->sl_mutex);
     97 
     98 	if (slotp->sl_sess_list == sessp) {
     99 		/* This is the first session in the list */
    100 		if (sessp->se_next != NULL) {
    101 			slotp->sl_sess_list = sessp->se_next;
    102 			sessp->se_next->se_prev = NULL;
    103 		} else {
    104 			/* Session is the only one in the list */
    105 			slotp->sl_sess_list = NULL;
    106 		}
    107 	} else {
    108 		/* Session is not the first one in the list */
    109 		if (sessp->se_next != NULL) {
    110 			/* Session is in the middle of the list */
    111 			sessp->se_prev->se_next = sessp->se_next;
    112 			sessp->se_next->se_prev = sessp->se_prev;
    113 		} else {
    114 			/* Session is the last one in the list */
    115 			sessp->se_prev->se_next = NULL;
    116 		}
    117 	}
    118 
    119 	/* Mark session as no longer valid */
    120 	sessp->se_magic = 0;
    121 
    122 	free(sessp);
    123 
    124 	(void) pthread_mutex_unlock(&slotp->sl_mutex);
    125 
    126 }
    127 
    128 /*
    129  * pkcs11_sessionlist_delete:
    130  * Delete all sessions associated with a particular slot's session list.
    131  *
    132  * Assumptions: slotp is a valid slot, no mutexes are held, and the
    133  * sessions were successfully closed with the provider already.
    134  */
    135 void
    136 pkcs11_sessionlist_delete(pkcs11_slot_t *slotp)
    137 {
    138 
    139 	pkcs11_session_t *sessp, *sess_nextp;
    140 
    141 	sessp = slotp->sl_sess_list;
    142 
    143 	/* Delete all the sessions in this slot's session list */
    144 	while (sessp) {
    145 		sess_nextp = sessp->se_next;
    146 
    147 		pkcs11_session_delete(slotp, sessp);
    148 
    149 		sessp = sess_nextp;
    150 	}
    151 
    152 	slotp->sl_sess_list = NULL;
    153 
    154 }
    155