libpkcs11/common/metaObjectManager.c

	metaObjectManager.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "metaGlobal.h"

/* Size of the template for creating key used for wrap/unwrap */
#define WRAP_KEY_TEMPLATE_SIZE  7

/*
 * Information necessary to create keys for C_WrapKey/C_UnwrapKey
 */
typedef struct _wrap_info {
    CK_OBJECT_CLASS     class; /* class of the key for wrap/unwrap */
    CK_KEY_TYPE     key_type; /* key type of key for wrap/unwrap */
    CK_ULONG        key_length; /* length of key */
    CK_MECHANISM_TYPE   mech_type; /* mech used for wrap/unwrap */
    CK_ULONG        iv_length; /* length of iv for mech */

    boolean_t       src_supports;
    boolean_t       dst_supports;
} wrap_info_t;

extern pthread_rwlock_t meta_sessionlist_lock;
extern meta_session_t *meta_sessionlist_head;

static wrap_info_t common_wrap_info[] = {
    {CKO_SECRET_KEY, CKK_AES, 16, CKM_AES_CBC_PAD, 16, B_FALSE, B_FALSE},
    {CKO_SECRET_KEY, CKK_DES3, 24, CKM_DES3_CBC_PAD, 8, B_FALSE, B_FALSE},
    {CKO_SECRET_KEY, CKK_DES, 8, CKM_DES_CBC_PAD, 8, B_FALSE, B_FALSE},
};

static unsigned int num_common_wrap_info =
    sizeof (common_wrap_info) / sizeof (wrap_info_t);

static wrap_info_t special_wrap_info[] = {
    {CKO_SECRET_KEY, CKK_SKIPJACK, 12,  CKM_SKIPJACK_WRAP, 0,
        B_FALSE, B_FALSE},
    {CKO_SECRET_KEY, CKK_BATON, 40, CKM_BATON_WRAP, 0,
        B_FALSE, B_FALSE},
    {CKO_SECRET_KEY, CKK_JUNIPER, 40, CKM_JUNIPER_WRAP, 0,
        B_FALSE, B_FALSE},
};
static unsigned int num_special_wrap_info =
    sizeof (special_wrap_info) / sizeof (wrap_info_t);

static wrap_info_t rsa_wrap_info[] = {
    {CKO_PUBLIC_KEY, CKK_RSA, 0,  CKM_RSA_PKCS, 0,
        B_FALSE, B_FALSE},
    {CKO_PUBLIC_KEY, CKK_RSA, 0, CKM_RSA_X_509, 0,
        B_FALSE, B_FALSE},
};
static unsigned int num_rsa_wrap_info =
    sizeof (rsa_wrap_info) / sizeof (wrap_info_t);


static pthread_rwlock_t meta_objectclose_lock;
static pthread_rwlock_t tokenobject_list_lock;
static meta_object_t *tokenobject_list_head;

static CK_BBOOL falsevalue = FALSE;
static CK_BBOOL truevalue = TRUE;

/*
 * Public and private exponent, and Module value for
 * creating the RSA public/private key.
 *
 */
static CK_BYTE PubExpo[3] = {0x01, 0x00, 0x01};
CK_BYTE PriExpo[128] = {
    0x8e, 0xc9, 0x70, 0x57, 0x6b, 0xcd, 0xfb, 0xa9,
    0x19, 0xad, 0xcd, 0x91, 0x69, 0xd5, 0x52, 0xec,
    0x72, 0x1e, 0x45, 0x15, 0x06, 0xdc, 0x65, 0x2d,
    0x98, 0xc4, 0xce, 0x33, 0x54, 0x15, 0x70, 0x8d,
    0xfa, 0x65, 0xea, 0x53, 0x44, 0xf3, 0x3e, 0x3f,
    0xb4, 0x4c, 0x60, 0xd5, 0x01, 0x2d, 0xa4, 0x12,
    0x99, 0xbf, 0x3f, 0x0b, 0xcd, 0xbb, 0x24, 0x10,
    0x60, 0x30, 0x5e, 0x58, 0xf8, 0x59, 0xaa, 0xd1,
    0x63, 0x3b, 0xbc, 0xcb, 0x94, 0x58, 0x38, 0x24,
    0xfc, 0x65, 0x25, 0xc5, 0xa6, 0x51, 0xa2, 0x2e,
    0xf1, 0x5e, 0xf5, 0xc1, 0xf5, 0x46, 0xf7, 0xbd,
    0xc7, 0x62, 0xa8, 0xe2, 0x27, 0xd6, 0x94, 0x5b,
    0xd3, 0xa2, 0xb5, 0x76, 0x42, 0x67, 0x6b, 0x86,
    0x91, 0x97, 0x4d, 0x07, 0x92, 0x00, 0x4a, 0xdf,
    0x0b, 0x65, 0x64, 0x05, 0x03, 0x48, 0x27, 0xeb,
    0xce, 0x9a, 0x49, 0x7f, 0x3e, 0x10, 0xe0, 0x01};

static CK_BYTE Modulus[128] = {
    0x94, 0x32, 0xb9, 0x12, 0x1d, 0x68, 0x2c, 0xda,
    0x2b, 0xe0, 0xe4, 0x97, 0x1b, 0x4d, 0xdc, 0x43,
    0xdf, 0x38, 0x6e, 0x7b, 0x9f, 0x07, 0x58, 0xae,
    0x9d, 0x82, 0x1e, 0xc7, 0xbc, 0x92, 0xbf, 0xd3,
    0xce, 0x00, 0xbb, 0x91, 0xc9, 0x79, 0x06, 0x03,
    0x1f, 0xbc, 0x9f, 0x94, 0x75, 0x29, 0x5f, 0xd7,
    0xc5, 0xf3, 0x73, 0x8a, 0xa4, 0x35, 0x43, 0x7a,
    0x00, 0x32, 0x97, 0x3e, 0x86, 0xef, 0x70, 0x6f,
    0x18, 0x56, 0x15, 0xaa, 0x6a, 0x87, 0xe7, 0x8d,
    0x7d, 0xdd, 0x1f, 0xa4, 0xe4, 0x31, 0xd4, 0x7a,
    0x8c, 0x0e, 0x20, 0xd2, 0x23, 0xf5, 0x57, 0x3c,
    0x1b, 0xa8, 0x44, 0xa4, 0x57, 0x8f, 0x33, 0x52,
    0xad, 0x83, 0xae, 0x4a, 0x97, 0xa6, 0x1e, 0xa6,
    0x2b, 0xfa, 0xea, 0xeb, 0x6e, 0x71, 0xb8, 0xb6,
    0x0a, 0x36, 0xed, 0x83, 0xce, 0xb0, 0xdf, 0xc1,
    0xd4, 0x3a, 0xe9, 0x99, 0x6f, 0xf3, 0x96, 0xb7};

static CK_RV
meta_clone_template_setup(meta_object_t *object,
    const generic_attr_t *attributes, size_t num_attributes);

/*
 * meta_objectManager_initialize
 *
 * Called from meta_Initialize.  Initializes all the variables used
 * by the object manager.
 */
CK_RV
meta_objectManager_initialize()
{
    if (pthread_rwlock_init(&meta_objectclose_lock, NULL) != 0) {
        return (CKR_FUNCTION_FAILED);
    }

    if (pthread_rwlock_init(&tokenobject_list_lock, NULL) != 0) {
        (void) pthread_rwlock_destroy(&meta_objectclose_lock);
        return (CKR_FUNCTION_FAILED);
    }

    tokenobject_list_head = NULL;

    return (CKR_OK);
}

void
meta_objectManager_finalize()
{
    /*
     * If there are still any token object in the list, need to
     * deactivate all of them.
     */
    (void) meta_token_object_deactivate(ALL_TOKEN);

    (void) pthread_rwlock_destroy(&meta_objectclose_lock);
    (void) pthread_rwlock_destroy(&tokenobject_list_lock);
}


/*
 * meta_handle2object
 *
 * Convert a CK_OBJECT_HANDLE to the corresponding metaobject. If
 * successful, a reader-lock on the object will be held to indicate
 * that it's in use. Call OBJRELEASE() when finished.
 *
 */
CK_RV
meta_handle2object(CK_OBJECT_HANDLE hObject, meta_object_t **object)
{
    meta_object_t *tmp_object = (meta_object_t *)(hObject);

    /* Check for bad args (eg CK_INVALID_HANDLE, which is 0/NULL). */
    if (tmp_object == NULL) {
        *object = NULL;
        return (CKR_OBJECT_HANDLE_INVALID);
    }


    /* Lock to ensure the magic-check + read-lock is atomic. */
    (void) pthread_rwlock_rdlock(&meta_objectclose_lock);

    if (tmp_object->magic_marker != METASLOT_OBJECT_MAGIC) {
        (void) pthread_rwlock_unlock(&meta_objectclose_lock);
        *object = NULL;
        return (CKR_OBJECT_HANDLE_INVALID);
    }
    (void) pthread_rwlock_rdlock(&tmp_object->object_lock);
    (void) pthread_rwlock_unlock(&meta_objectclose_lock);

    *object = tmp_object;
    return (CKR_OK);
}


/*
 * meta_object_alloc
 *
 * Creates a new metaobject, but does not yet add it to the object list.
 * Once the caller has finished initializing the object (by setting
 * object attributes), meta_object_add should be called. This two-step
 * process prevents others from seeing the object until fully intitialized.
 *
 */
CK_RV
meta_object_alloc(meta_session_t *session, meta_object_t **object)
{
    meta_object_t *new_object;
    CK_ULONG num_slots;

    /* Allocate memory for the object. */
    new_object = calloc(1, sizeof (meta_object_t));
    if (new_object == NULL)
        return (CKR_HOST_MEMORY);

    num_slots = meta_slotManager_get_slotcount();

    new_object->clones = calloc(num_slots, sizeof (slot_object_t *));
    if (new_object->clones == NULL) {
        free(new_object);
        return (CKR_HOST_MEMORY);
    }

    new_object->tried_create_clone = calloc(num_slots, sizeof (boolean_t));
    if (new_object->tried_create_clone == NULL) {
        free(new_object->clones);
        free(new_object);
        return (CKR_HOST_MEMORY);
    }

    /* Initialize the object fields. */
    new_object->magic_marker = METASLOT_OBJECT_MAGIC;
    (void) pthread_rwlock_init(&new_object->object_lock, NULL);
    (void) pthread_rwlock_init(&new_object->attribute_lock, NULL);
    (void) pthread_mutex_init(&new_object->clone_create_lock, NULL);
    (void) pthread_mutex_init(&new_object->isClosingObject_lock, NULL);
    new_object->creator_session = session;

    *object = new_object;

    return (CKR_OK);
}


/*
 * meta_object_get_attr
 *
 * Get attribute values to fill in attribute values
 * being kept in the metaslot object.  The following 4 attributes
 * in the meta_object_t structure will be filled in:
 * isToken, isPrivate, isSensitive, isExtractable
 *
 * It's basically an easy way to do a C_GetAttributeValue.
 * So, the hSession argument is assumed
 * to be valid, and the pointer to meta_object_t is also assumed
 * to be valid.
 */
CK_RV
meta_object_get_attr(slot_session_t *slot_session, CK_OBJECT_HANDLE hObject,
    meta_object_t *object)
{
    CK_BBOOL is_sensitive, is_extractable, is_token, is_private;
    CK_OBJECT_CLASS class;
    CK_ATTRIBUTE attrs[3];
    CK_RV rv;
    CK_SESSION_HANDLE hSession = slot_session->hSession;
    CK_SLOT_ID fw_st_id = slot_session->fw_st_id;

    attrs[0].type = CKA_CLASS;
    attrs[0].pValue = &class;
    attrs[0].ulValueLen = sizeof (class);

    attrs[1].type = CKA_TOKEN;
    attrs[1].pValue = &is_token;
    attrs[1].ulValueLen = sizeof (is_token);

    attrs[2].type = CKA_PRIVATE;
    attrs[2].pValue = &is_private;
    attrs[2].ulValueLen = sizeof (is_private);

    rv = FUNCLIST(fw_st_id)->C_GetAttributeValue(hSession, hObject,
        attrs, 3);
    if (rv != CKR_OK) {
        return (rv);
    }


    if ((class == CKO_PRIVATE_KEY) || (class == CKO_SECRET_KEY)) {
        /*
         * CKA_SENSITIVE and CKA_EXTRACTABLE only applies to private
         * and secret keys.
         */
        attrs[0].type = CKA_SENSITIVE;
        attrs[0].pValue = &is_sensitive;
        attrs[0].ulValueLen = sizeof (is_sensitive);

        attrs[1].type = CKA_EXTRACTABLE;
        attrs[1].pValue = &is_extractable;
        attrs[1].ulValueLen = sizeof (is_extractable);

        rv = FUNCLIST(fw_st_id)->C_GetAttributeValue(hSession,
            hObject, attrs, 2);
        if (rv != CKR_OK) {
            return (rv);
        }
    } else {
        is_sensitive = CK_FALSE;
        is_extractable = CK_TRUE;
    }

    object->isToken = is_token;
    object->isPrivate = is_private;
    object->isSensitive = is_sensitive;
    object->isExtractable = is_extractable;

    return (CKR_OK);
}


/*
 * meta_object_activate
 *
 * Add a new metaobject to the list of objects. See also meta_object_create,
 * which would be called to create an object before it is added.
 */
void
meta_object_activate(meta_object_t *new_object)
{
    pthread_rwlock_t *list_lock;
    meta_object_t **list_head;

    /*
     * For session objects, we keep the list in the session that created
     * this object, because this object will be destroyed when that session
     * is closed.
     *
     * For token objects, the list is global (ie, not associated with any
     * particular session).
     */
    if (new_object->isToken) {
        list_lock = &tokenobject_list_lock;
        list_head = &tokenobject_list_head;
    } else {
        list_lock = &new_object->creator_session->object_list_lock;
        list_head = &new_object->creator_session->object_list_head;
    }

    /* Add object to the list of objects. */
    (void) pthread_rwlock_wrlock(list_lock);
    INSERT_INTO_LIST(*list_head, new_object);
    (void) pthread_rwlock_unlock(list_lock);
}


/*
 * meta_object_deactivate
 *
 * Removes the object from the list of valid meta objects.  Note
 * that this function does not clean up any allocated
 * resources (memory, object clones, etc).   Cleaning up of
 * allocated resources is done by calling the meta_object_deallocate()
 *
 */
CK_RV
meta_object_deactivate(meta_object_t *object, boolean_t have_list_lock,
    boolean_t have_object_lock)
{
    pthread_rwlock_t *list_lock;
    meta_object_t **list_head;

    if (!have_object_lock) {
        (void) pthread_rwlock_rdlock(&object->object_lock);
    }

    (void) pthread_mutex_lock(&object->isClosingObject_lock);
    if (object->isClosingObject) {
        /* Lost a delete race. */
        (void) pthread_mutex_unlock(&object->isClosingObject_lock);
        OBJRELEASE(object);
        return (CKR_OBJECT_HANDLE_INVALID);
    }
    object->isClosingObject = B_TRUE;
    (void) pthread_mutex_unlock(&object->isClosingObject_lock);

    if (object->isToken) {
        list_lock = &tokenobject_list_lock;
        list_head = &tokenobject_list_head;
    } else {
        list_lock = &object->creator_session->object_list_lock;
        list_head = &object->creator_session->object_list_head;
    }

    /*
     * Remove object from the object list. Once removed, it will not
     * be possible for another thread to begin using the object.
     */
    (void) pthread_rwlock_wrlock(&meta_objectclose_lock);
    if (!have_list_lock) {
        (void) pthread_rwlock_wrlock(list_lock);
    }


    object->magic_marker = METASLOT_OBJECT_BADMAGIC;
    /*
     * Can't use the regular REMOVE_FROM_LIST() function because
     * that will miss the "error cleanup" situation where object is not yet
     * in the list (object->next == NULL && object->prev == NULL)
     */
    if (*list_head == object) {
        /* Object is the first one in the list */
        if (object->next) {
            *list_head = object->next;
            object->next->prev = NULL;
        } else {
            /* Object is the only one in the list */
            *list_head = NULL;
        }
    } else if (object->next != NULL || object->prev != NULL) {
        if (object->next) {
            object->prev->next = object->next;
            object->next->prev = object->prev;
        } else {
            /* Object is the last one in the list */
            object->prev->next = NULL;
        }
    }

    if (!have_list_lock) {
        (void) pthread_rwlock_unlock(list_lock);
    }
    (void) pthread_rwlock_unlock(&meta_objectclose_lock);

    /*
     * Wait for anyone already using object to finish, by obtaining
     * a writer-lock (need to release our reader-lock first). Once we
     * get the write lock, we can just release it and finish cleaning
     * up the object.
     */
    (void) pthread_rwlock_unlock(&object->object_lock); /* rdlock */
    (void) pthread_rwlock_wrlock(&object->object_lock);
    (void) pthread_rwlock_unlock(&object->object_lock); /* wrlock */


    return (CKR_OK);
}


/*
 * meta_object_dealloc
 *
 * Performs final object cleanup, releasing any allocated memory and
 * destroying any clones on other slots. Caller is assumed to have
 * called meta_object_deactivate() before this function.
 *
 * Caller is assumed to have only reference to object, but should have
 * released any lock.
 *
 * If "nukeSourceObj" argument is true, we will actually delete the
 * object from the underlying slot.
 */
CK_RV
meta_object_dealloc(meta_object_t *object, boolean_t nukeSourceObj)
{
    CK_RV rv, save_rv = CKR_OK;
    CK_ULONG slotnum, num_slots;
    CK_ULONG i;

    /* First, delete all the clones of this object on other slots. */
    num_slots = meta_slotManager_get_slotcount();
    for (slotnum = 0; slotnum < num_slots; slotnum++) {
        slot_session_t *obj_session;
        slot_object_t *clone;

        clone = object->clones[slotnum];
        if (clone == NULL)
            continue;

        if (nukeSourceObj || !object->isToken) {

            rv = meta_get_slot_session(slotnum, &obj_session,
                object->creator_session->session_flags);

            if (rv == CKR_OK) {
                rv = FUNCLIST(obj_session->fw_st_id)->\
                    C_DestroyObject(obj_session->hSession,
                    clone->hObject);

                meta_release_slot_session(obj_session);
                if ((rv != CKR_OK) && (save_rv == CKR_OK)) {
                    save_rv = rv;
                }
            }

        }

        meta_slot_object_deactivate(clone);
        meta_slot_object_dealloc(clone);

        object->clones[slotnum] = NULL;
    }

    /* Now erase and delete any attributes in the metaobject. */
    dealloc_attributes(object->attributes, object->num_attributes);

    free(object->clones);
    free(object->tried_create_clone);

    if (object->clone_template) {
        for (i = 0; i < object->clone_template_size; i++) {
            free(((object->clone_template)[i]).pValue);
        }
        free(object->clone_template);
    }

    /* Cleanup remaining object fields. */
    (void) pthread_rwlock_destroy(&object->object_lock);
    (void) pthread_rwlock_destroy(&object->attribute_lock);
    (void) pthread_mutex_destroy(&object->isClosingObject_lock);
    (void) pthread_mutex_destroy(&object->clone_create_lock);

    meta_object_delay_free(object);

    return (save_rv);
}


/*
 * meta_slot_object_alloc
 */
CK_RV
meta_slot_object_alloc(slot_object_t **object) {
    slot_object_t *new_object;

    new_object = calloc(1, sizeof (slot_object_t));
    if (new_object == NULL)
        return (CKR_HOST_MEMORY);

    *object = new_object;
    return (CKR_OK);
}


/*
 * meta_slot_object_activate
 */
void
meta_slot_object_activate(slot_object_t *object,
    slot_session_t *creator_session, boolean_t isToken)
{
    object->creator_session = creator_session;

    if (isToken) {
        extern slot_data_t *slots;
        slot_data_t *slot;

        slot = &(slots[object->creator_session->slotnum]);

        (void) pthread_rwlock_wrlock(&slot->tokenobject_list_lock);
        INSERT_INTO_LIST(slot->tokenobject_list_head, object);
        (void) pthread_rwlock_unlock(&slot->tokenobject_list_lock);
    } else {
        slot_session_t *session = object->creator_session;

        /* Add to session's list of session objects. */
        (void) pthread_rwlock_wrlock(&session->object_list_lock);
        INSERT_INTO_LIST(session->object_list_head, object);
        (void) pthread_rwlock_unlock(&session->object_list_lock);
    }
    object->isToken = isToken;
}


/*
 * meta_slot_object_deactivate
 *
 * Remove the specified slot object from the appropriate object list.
 */
void
meta_slot_object_deactivate(slot_object_t *object)
{
    slot_object_t **list_head;
    pthread_rwlock_t *list_lock;

    if (object->isToken) {
        extern slot_data_t *slots;
        slot_data_t *slot;

        slot = &(slots[object->creator_session->slotnum]);

        list_head = &slot->tokenobject_list_head;
        list_lock = &slot->tokenobject_list_lock;
    } else {
        list_head = &object->creator_session->object_list_head;
        list_lock = &object->creator_session->object_list_lock;
    }

    (void) pthread_rwlock_wrlock(list_lock);
    REMOVE_FROM_LIST(*list_head, object);
    (void) pthread_rwlock_unlock(list_lock);
}


/*
 * meta_slot_object_dealloc
 */
void
meta_slot_object_dealloc(slot_object_t *object)
{
    /* Not much cleanup for slot objects, unlike meta objects... */
    free(object);
}


/*
 * meta_object_copyin
 *
 * When a key is generated/derived/unwrapped, the attribute values
 * created by the token are not immediately read into our copy of the
 * attributes. We defer this work until we actually need to know.
 */
CK_RV
meta_object_copyin(meta_object_t *object)
{
    CK_RV rv = CKR_OK;
    slot_session_t *session = NULL;
    CK_ATTRIBUTE *attrs = NULL, *attrs_with_val = NULL;
    slot_object_t *slot_object = NULL;
    CK_ULONG num_attrs = 0, i, num_attrs_with_val;
    CK_SESSION_HANDLE hSession;
    CK_SLOT_ID fw_st_id;

    /* Make sure no one else is looking at attributes. */
    (void) pthread_rwlock_wrlock(&object->attribute_lock);

    /* Did we just lose a copyin race with another thread */
    if (object->attributes != NULL) {
        goto finish;
    }

    slot_object = object->clones[object->master_clone_slotnum];

    rv = meta_get_slot_session(object->master_clone_slotnum, &session,
        object->creator_session->session_flags);
    if (rv != CKR_OK) {
        goto finish;
    }

    /*
     * first, get the master template of all the attributes
     * for this object
     */
    rv = get_master_attributes_by_object(session, slot_object,
        &(object->attributes), &(object->num_attributes));
    if (rv != CKR_OK) {
        goto finish;
    }

    /*
     * Get value for each attribute items.
     *
     * Some attributes are required by the given object type.
     * Some are optional.  Get all the values first, and then
     * make sure we have value for all required values,
     */
    attrs = calloc(object->num_attributes, sizeof (CK_ATTRIBUTE));
    if (attrs == NULL) {
        rv = CKR_HOST_MEMORY;
        goto finish;
    }


    for (i = 0; i < object->num_attributes; i++) {
        attrs[i].type =
            ((object->attributes[i]).attribute).type;
    }
    num_attrs = object->num_attributes;

    hSession = session->hSession;
    fw_st_id = session->fw_st_id;

    /* first, call C_GetAttributeValue() to get size for each attribute */
    rv = FUNCLIST(fw_st_id)->C_GetAttributeValue(hSession,
        slot_object->hObject, attrs, num_attrs);
    /*
     * If the return value is not CKR_OK, allow it to be
     * CKR_ATTRIBUTE_TYPE_INVALID for now.
     * Some attributes defined in PKCS#11 version 2.11
     * might not be defined in earlier versions.  We will
     * TRY to work with those providers if the attribute
     * is optional.
     */
    if ((rv != CKR_OK) && (rv != CKR_ATTRIBUTE_TYPE_INVALID)) {
        rv = CKR_FUNCTION_FAILED; /* make sure rv is appropriate */
        goto finish;
    }

    /*
     * allocate space.
     * Since we don't know how many attributes have
     * values at this time, just assume all of them
     * have values so we save one loop to count the number
     * of attributes that have value.
     */
    attrs_with_val = calloc(num_attrs, sizeof (CK_ATTRIBUTE));
    if (attrs_with_val == NULL) {
        rv = CKR_HOST_MEMORY;
        goto finish;
    }


    num_attrs_with_val = 0;
    for (i = 0; i < num_attrs; i++) {
        if (!(((CK_LONG)(attrs[i].ulValueLen)) > 0)) {
            /* if it isn't an optional attr, len should be > 0 */
            if (!object->attributes[i].canBeEmptyValue) {
                rv = CKR_FUNCTION_FAILED;
                goto finish;
            }
        } else {
            attrs_with_val[num_attrs_with_val].type = attrs[i].type;
            attrs_with_val[num_attrs_with_val].ulValueLen =
                attrs[i].ulValueLen;
            attrs_with_val[num_attrs_with_val].pValue =
                malloc(attrs[i].ulValueLen);
            if (attrs_with_val[num_attrs_with_val].pValue == NULL) {
                rv = CKR_HOST_MEMORY;
                goto finish;
            }
            num_attrs_with_val++;
        }
    }

    rv = FUNCLIST(fw_st_id)->C_GetAttributeValue(hSession,
        slot_object->hObject, attrs_with_val, num_attrs_with_val);
    if (rv != CKR_OK) {
        goto finish;
    }

    /* store these values into the meta object */
    for (i = 0; i < num_attrs_with_val; i++) {
        rv = attribute_set_value(&(attrs_with_val[i]),
            object->attributes, object->num_attributes);
        if (rv != CKR_OK) {
            goto finish;
        }
    }

finish:
    (void) pthread_rwlock_unlock(&object->attribute_lock);

    if (session)
        meta_release_slot_session(session);

    if (attrs) {
        for (i = 0; i < num_attrs; i++) {
            if (attrs[i].pValue != NULL) {
                free(attrs[i].pValue);
            }
        }
        free(attrs);
    }

    if (attrs_with_val) {
        for (i = 0; i < num_attrs; i++) {
            if (attrs_with_val[i].pValue != NULL) {
                free(attrs_with_val[i].pValue);
            }
        }
        free(attrs_with_val);
    }
    return (rv);
}

/*
 * Create an object to be used for wrapping and unwrapping.
 * The same template will be used for all wrapping/unwrapping keys all
 * the time
 */

static CK_RV
create_wrap_unwrap_key(slot_session_t *slot_session, CK_OBJECT_HANDLE *hObject,
    wrap_info_t *wrap_info, char *key_data, CK_ULONG key_len)
{

    CK_OBJECT_CLASS objclass;
    CK_KEY_TYPE keytype;
    CK_RV rv = CKR_OK;
    int i;
    CK_ATTRIBUTE template[WRAP_KEY_TEMPLATE_SIZE];

    i = 0;
    objclass = wrap_info->class;
    template[i].type = CKA_CLASS;
    template[i].pValue = &objclass;
    template[i].ulValueLen = sizeof (objclass);

    i++;
    keytype = wrap_info->key_type;
    template[i].type = CKA_KEY_TYPE;
    template[i].pValue = &keytype;
    template[i].ulValueLen = sizeof (keytype);

    i++;
    template[i].type = CKA_TOKEN;
    template[i].pValue = &falsevalue;
    template[i].ulValueLen = sizeof (falsevalue);


    if (objclass == CKO_SECRET_KEY) {
        i++;
        template[i].type = CKA_VALUE;
        template[i].pValue = key_data;
        template[i].ulValueLen = key_len;

        i++;
        template[i].type = CKA_WRAP;
        template[i].pValue = &truevalue;
        template[i].ulValueLen = sizeof (truevalue);

        i++;
        template[i].type = CKA_UNWRAP;
        template[i].pValue = &truevalue;
        template[i].ulValueLen = sizeof (truevalue);
    } else {
        /* Modulus is the same for rsa public and private key */
        i++;
        template[i].type = CKA_MODULUS;
        template[i].pValue = Modulus;
        template[i].ulValueLen = sizeof (Modulus);

        if (objclass == CKO_PUBLIC_KEY) {
            /* RSA public key */
            i++;
            template[i].type = CKA_PUBLIC_EXPONENT;
            template[i].pValue = PubExpo;
            template[i].ulValueLen = sizeof (PubExpo);

            i++;
            template[i].type = CKA_WRAP;
            template[i].pValue = &truevalue;
            template[i].ulValueLen = sizeof (truevalue);
        } else {
            /* RSA private key */
            i++;
            template[i].type = CKA_PRIVATE_EXPONENT;
            template[i].pValue = PriExpo;
            template[i].ulValueLen = sizeof (PriExpo);

            i++;
            template[i].type = CKA_UNWRAP;
            template[i].pValue = &truevalue;
            template[i].ulValueLen = sizeof (truevalue);
        }
    }

    rv = FUNCLIST(slot_session->fw_st_id)->C_CreateObject(
        slot_session->hSession, template, i + 1, hObject);

    return (rv);
}


/*
 * Create a clone of a non-sensitive and extractable object.
 * If the template required for creating the clone doesn't exist,
 * it will be retrieved from the master clone.
 */
static CK_RV
clone_by_create(meta_object_t *object, slot_object_t *new_clone,
    slot_session_t *dst_slot_session)
{

    CK_RV rv;

    if (object->attributes == NULL) {
        rv = meta_object_copyin(object);
        if (rv != CKR_OK) {
            return (rv);
        }
    }

    if (object->clone_template == NULL) {
        rv = meta_clone_template_setup(object, object->attributes,
            object->num_attributes);
        if (rv != CKR_OK) {
            return (rv);
        }
    }

    /* Create the clone... */
    rv = FUNCLIST(dst_slot_session->fw_st_id)->C_CreateObject(
        dst_slot_session->hSession, object->clone_template,
        object->clone_template_size, &(new_clone->hObject));
    if (rv != CKR_OK) {
        return (rv);
    }

    return (CKR_OK);
}

/*
 * Goes through the list of wraping mechanisms, and returns the first
 * one that is supported by both the source and the destination slot.
 * If none of the mechanisms are supported by both slot, return the
 * first mechanism that's supported by the source slot
 */
static CK_RV
find_best_match_wrap_mech(wrap_info_t *wrap_info, int num_info,
    CK_ULONG src_slotnum, CK_ULONG dst_slotnum, int *first_both_mech,
    int *first_src_mech)
{

    int i;
    boolean_t src_supports, dst_supports;
    CK_RV rv;

    for (i = 0; i < num_info; i++) {
        src_supports = B_FALSE;
        dst_supports = B_FALSE;

        rv = meta_mechManager_slot_supports_mech(
            (wrap_info[i]).mech_type, src_slotnum,
            &src_supports, NULL, B_FALSE);
        if (rv != CKR_OK) {
            return (rv);
        }

        rv = meta_mechManager_slot_supports_mech(
            (wrap_info[i]).mech_type, dst_slotnum,
            &dst_supports, NULL, B_FALSE);
        if (rv != CKR_OK) {
            return (rv);
        }

        /* both source and destination supports the mech */
        if ((src_supports) && (dst_supports)) {
            *first_both_mech = i;
            return (CKR_OK);
        }

        if ((src_supports) && (*first_src_mech == -1)) {
            *first_src_mech = i;
        }
    }
    return (CKR_OK);
}

/*
 * Determine the wrapping/unwrapping mechanism to be used
 *
 * If possible, select a mechanism that's supported by both source
 * and destination slot.  If none of the mechanisms are supported
 * by both slot, then, select the first one supported by
 * the source slot.
 */

static CK_RV
get_wrap_mechanism(CK_OBJECT_CLASS obj_class, CK_KEY_TYPE key_type,
    CK_ULONG src_slotnum, CK_ULONG dst_slotnum, wrap_info_t *wrap_info)
{
    wrap_info_t *wrap_info_to_search = NULL;
    unsigned int num_wrap_info;
    CK_RV rv;
    int i;
    boolean_t src_supports = B_FALSE, dst_supports = B_FALSE;
    int first_src_mech, rsa_first_src_mech, first_both_mech;

    if ((obj_class == CKO_PRIVATE_KEY) && (key_type == CKK_KEA)) {
        /*
         * only SKIPJACK keys can be used for wrapping
         * KEA private keys
         */

        for (i = 0; i < num_special_wrap_info; i++) {
            if ((special_wrap_info[i]).mech_type
                != CKM_SKIPJACK_WRAP) {
                continue;
            }

            src_supports = B_FALSE;
            dst_supports = B_FALSE;

            rv = meta_mechManager_slot_supports_mech(
                (special_wrap_info[i]).mech_type, src_slotnum,
                &src_supports, NULL, B_FALSE);
            if (rv != CKR_OK) {
                goto finish;
            }

            rv = meta_mechManager_slot_supports_mech(
                (special_wrap_info[i]).mech_type, dst_slotnum,
                &dst_supports, NULL, B_FALSE);
            if (rv != CKR_OK) {
                goto finish;
            }

            if (src_supports) {
                /*
                 * both src and dst supports the mech or
                 * only the src supports the mech
                 */
                (void) memcpy(wrap_info,
                    &(special_wrap_info[i]),
                    sizeof (wrap_info_t));

                wrap_info->src_supports = src_supports;
                wrap_info->dst_supports = dst_supports;
                rv = CKR_OK;
                goto finish;
            }

        }

        /*
         * if we are here, that means neither the source slot
         * nor the destination slots suppports CKM_SKIPJACK_WRAP
         */
        rv = CKR_FUNCTION_FAILED;
        goto finish;
    }

    if ((key_type == CKK_SKIPJACK) || (key_type == CKK_BATON) ||
        (key_type == CKK_JUNIPER)) {
        /* special key types */
        wrap_info_to_search = special_wrap_info;
        num_wrap_info = num_special_wrap_info;
    } else {
        /* use the regular wrapping mechanisms */
        wrap_info_to_search = common_wrap_info;
        num_wrap_info = num_common_wrap_info;
    }

    first_both_mech = -1;
    first_src_mech = -1;

    rv = find_best_match_wrap_mech(wrap_info_to_search, num_wrap_info,
        src_slotnum, dst_slotnum, &first_both_mech, &first_src_mech);
    if (rv != CKR_OK) {
        goto finish;
    }

    if (first_both_mech != -1) {
        (void) memcpy(wrap_info,
            &(wrap_info_to_search[first_both_mech]),
            sizeof (wrap_info_t));

        wrap_info->src_supports = B_TRUE;
        wrap_info->dst_supports = B_TRUE;
        rv = CKR_OK;
        goto finish;
    }

    /*
     * If we are here, we did not find a mechanism that's supported
     * by both source and destination slot.
     *
     * If it is a secret key, can also try to wrap it with
     * a RSA public key
     */
    if (obj_class == CKO_SECRET_KEY) {
        first_both_mech = -1;
        rsa_first_src_mech = -1;

        rv = find_best_match_wrap_mech(rsa_wrap_info,
            num_rsa_wrap_info, src_slotnum, dst_slotnum,
            &first_both_mech, &rsa_first_src_mech);

        if (rv != CKR_OK) {
            goto finish;
        }

        if (first_both_mech > -1) {
            (void) memcpy(wrap_info,
                &(rsa_wrap_info[first_both_mech]),
                sizeof (wrap_info_t));

            wrap_info->src_supports = B_TRUE;
            wrap_info->dst_supports = B_TRUE;
            rv = CKR_OK;
            goto finish;
        }
    }

    /*
     * if we are here, that means none of the mechanisms are supported
     * by both the source and the destination
     */
    if (first_src_mech > -1) {
        /* source slot support one of the secret key mechs */
        (void) memcpy(wrap_info,
            &(wrap_info_to_search[first_src_mech]),
            sizeof (wrap_info_t));
        wrap_info->src_supports = B_TRUE;
        wrap_info->dst_supports = B_FALSE;
        rv = CKR_OK;
    } else if (rsa_first_src_mech > -1) {
        /* source slot support one of the RSA mechs */
        (void) memcpy(wrap_info, &(rsa_wrap_info[rsa_first_src_mech]),
            sizeof (wrap_info_t));

        wrap_info->src_supports = B_TRUE;
        wrap_info->dst_supports = B_FALSE;
        rv = CKR_OK;
    } else {
        /* neither source nor destination support any wrap mechs */
        rv = CKR_FUNCTION_FAILED;
    }

finish:
    return (rv);
}


/*
 * This is called if the object to be cloned is a sensitive object
 */
static CK_RV
clone_by_wrap(meta_object_t *object, slot_object_t *new_clone,
    slot_session_t *dst_slot_session)
{
    slot_session_t *src_slot_session = NULL;
    CK_OBJECT_HANDLE wrappingKey = NULL, unwrappingKey = NULL;
    CK_MECHANISM wrappingMech;
    CK_BYTE *wrappedKey = NULL;
    CK_ULONG wrappedKeyLen = 0;
    slot_object_t *slot_object = NULL;
    CK_RV rv = CKR_OK;
    CK_OBJECT_HANDLE unwrapped_obj;
    meta_object_t *tmp_meta_obj = NULL;
    slot_object_t *tmp_slot_obj = NULL;
    CK_OBJECT_CLASS obj_class;
    CK_KEY_TYPE key_type;
    meta_session_t *tmp_meta_session = NULL;
    CK_ATTRIBUTE unwrap_template[4];
    char key_data[1024]; /* should be big enough for any key size */
    char ivbuf[1024]; /* should be big enough for any mech */
    wrap_info_t wrap_info;
    CK_ULONG key_len, unwrap_template_size;

    slot_object = object->clones[object->master_clone_slotnum];

    rv = meta_get_slot_session(object->master_clone_slotnum,
        &src_slot_session, object->creator_session->session_flags);
    if (rv != CKR_OK) {
        return (rv);
    }

    /*
     * get the object class and key type for unwrap template
     * This information will also be used for determining
     * which wrap mechanism and which key to use for
     * doing the wrapping
     */
    unwrap_template[0].type = CKA_CLASS;
    unwrap_template[0].pValue = &obj_class;
    unwrap_template[0].ulValueLen = sizeof (obj_class);

    unwrap_template[1].type = CKA_KEY_TYPE;
    unwrap_template[1].pValue = &key_type;
    unwrap_template[1].ulValueLen = sizeof (key_type);

    rv = FUNCLIST(src_slot_session->fw_st_id)->C_GetAttributeValue(
        src_slot_session->hSession, slot_object->hObject,
        unwrap_template, 2);
    if (rv != CKR_OK) {
        goto finish;
    }

    rv = get_wrap_mechanism(obj_class, key_type, src_slot_session->slotnum,
        dst_slot_session->slotnum, &wrap_info);
    if (rv != CKR_OK) {
        goto finish;
    }

    /*
     * open the random device and read number of bytes required for
     * creating a secret key for wrapping and unwrapping
     */
    if (wrap_info.class == CKO_SECRET_KEY) {

        /*
         * /dev/urandom will be used for generating the key used
         * for doing the wrap/unwrap.  It's should be ok to
         * use /dev/urandom because this key is used for this
         * one time operation only.  It doesn't need to be stored.
         */
        int fd;

        while ((fd = open(RANDOM_DEVICE, O_RDONLY)) < 0) {
            if (errno != EINTR)
                break;
        }
        if (fd == -1) {
            rv = CKR_FUNCTION_FAILED;
            goto finish;
        }
        key_len = wrap_info.key_length;

        if (looping_read(fd, key_data, key_len) != key_len) {
            rv = CKR_FUNCTION_FAILED;
            goto finish;
        }

        if (wrap_info.iv_length > 0) {
            if (looping_read(fd, ivbuf, wrap_info.iv_length)
                != wrap_info.iv_length) {
                rv = CKR_FUNCTION_FAILED;
                goto finish;
            }
        }

        (void) close(fd);
    }

    /* create the wrapping key */
    rv = create_wrap_unwrap_key(src_slot_session, &wrappingKey,
        &wrap_info, key_data, key_len);
    if (rv != CKR_OK) {
        goto finish;
    }

    wrappingMech.mechanism = wrap_info.mech_type;
    wrappingMech.pParameter = ((wrap_info.iv_length > 0) ? ivbuf : NULL);
    wrappingMech.ulParameterLen = wrap_info.iv_length;

    /* get the size of the wrapped key */
    rv = FUNCLIST(src_slot_session->fw_st_id)->C_WrapKey(
        src_slot_session->hSession, &wrappingMech,
        wrappingKey, slot_object->hObject, NULL, &wrappedKeyLen);

    if (rv != CKR_OK) {
        goto finish;
    }

    wrappedKey = malloc(wrappedKeyLen * sizeof (CK_BYTE));
    if (wrappedKey == NULL) {
        rv = CKR_HOST_MEMORY;
        goto finish;
    }

    /* do the actual key wrapping */
    rv = FUNCLIST(src_slot_session->fw_st_id)->C_WrapKey(
        src_slot_session->hSession, &wrappingMech,
        wrappingKey, slot_object->hObject, wrappedKey, &wrappedKeyLen);

    if (rv != CKR_OK) {
        goto finish;
    }

    /* explicitly force the unwrapped object to be not sensitive */
    unwrap_template[2].type = CKA_SENSITIVE;
    unwrap_template[2].pValue = &falsevalue;
    unwrap_template[2].ulValueLen = sizeof (falsevalue);

    unwrap_template[3].type = CKA_TOKEN;
    unwrap_template[3].pValue = &falsevalue;
    unwrap_template[3].ulValueLen = sizeof (falsevalue);

    unwrap_template_size =
        sizeof (unwrap_template) / sizeof (CK_ATTRIBUTE);

    if (!wrap_info.dst_supports) {
        /*
         * if we know for sure that the destination slot doesn't
         * support the wrapping mechanism, no point in trying.
         * go directly to unwrap in source slot, and create key
         * in destination
         */
        goto unwrap_in_source;
    }

    /* create the unwrapping key in destination slot */
    if (wrap_info.key_type == CKK_RSA) {
        /* for RSA key, the unwrapping key need to be private key */
        wrap_info.class = CKO_PRIVATE_KEY;
    }
    rv = create_wrap_unwrap_key(dst_slot_session,
        &unwrappingKey, &wrap_info, key_data, key_len);
    if (rv != CKR_OK) {
        goto finish;
    }

    rv = FUNCLIST(dst_slot_session->fw_st_id)->C_UnwrapKey(
        dst_slot_session->hSession, &wrappingMech,
        unwrappingKey, wrappedKey, wrappedKeyLen, unwrap_template,
        unwrap_template_size, &(new_clone->hObject));

    if (rv != CKR_OK) {
unwrap_in_source:

        /*
         * There seemed to be a problem with unwrapping in the
         * destination slot.
         * Try to do the unwrap in the src slot so it becomes
         * a non-sensitive object, then, get all the attributes
         * and create the object in the destination slot
         */


        if (wrap_info.class == CKO_SECRET_KEY) {
            /* unwrap with same key used for wrapping */
            rv = FUNCLIST(src_slot_session->fw_st_id)->C_UnwrapKey(
                src_slot_session->hSession,
                &wrappingMech, wrappingKey, wrappedKey,
                wrappedKeyLen, unwrap_template,
                unwrap_template_size, &(unwrapped_obj));
        } else {
            /*
             * If the object is wrapping with RSA public key, need
             * need to create RSA private key for unwrapping
             */
            wrap_info.class = CKO_PRIVATE_KEY;
            rv = create_wrap_unwrap_key(src_slot_session,
                &unwrappingKey, &wrap_info, key_data, key_len);
            if (rv != CKR_OK) {
                goto finish;
            }
            rv = FUNCLIST(src_slot_session->fw_st_id)->C_UnwrapKey(
                src_slot_session->hSession,
                &wrappingMech, unwrappingKey, wrappedKey,
                wrappedKeyLen, unwrap_template,
                unwrap_template_size, &(unwrapped_obj));
        }


        if (rv != CKR_OK) {
            goto finish;
        }

        rv = meta_session_alloc(&tmp_meta_session);
        if (rv != CKR_OK) {
            goto finish;
        }

        tmp_meta_session->session_flags = CKF_SERIAL_SESSION;

        rv = meta_object_alloc(tmp_meta_session, &tmp_meta_obj);
        if (rv != CKR_OK) {
            goto finish;
        }

        rv = meta_slot_object_alloc(&tmp_slot_obj);
        if (rv != CKR_OK) {
            goto finish;
        }

        tmp_meta_obj->master_clone_slotnum = src_slot_session->slotnum;
        tmp_slot_obj->hObject = unwrapped_obj;
        tmp_meta_obj->clones[tmp_meta_obj->master_clone_slotnum]
            = tmp_slot_obj;
        meta_slot_object_activate(tmp_slot_obj, src_slot_session,
            B_FALSE);
        tmp_slot_obj = NULL;

        rv = clone_by_create(tmp_meta_obj, new_clone,
            dst_slot_session);
        if (rv != CKR_OK) {
            goto finish;
        }
    }

finish:
    if (unwrappingKey) {
        (void) FUNCLIST(dst_slot_session->fw_st_id)->C_DestroyObject(
            dst_slot_session->hSession, unwrappingKey);
    }

    if (wrappingKey) {
        (void) FUNCLIST(src_slot_session->fw_st_id)->C_DestroyObject(
            src_slot_session->hSession, wrappingKey);
    }

    if (tmp_slot_obj) {
        (void) meta_slot_object_dealloc(tmp_slot_obj);
    }

    if (tmp_meta_obj) {
        (void) meta_object_dealloc(tmp_meta_obj, B_TRUE);
    }

    if (tmp_meta_session) {
        (void) meta_session_dealloc(tmp_meta_session);
    }

    if (wrappedKey) {
        free(wrappedKey);
    }

    if (src_slot_session) {
        meta_release_slot_session(src_slot_session);
    }

    return (rv);

}


/*
 * meta_object_get_clone
 *
 * Creates a "clone" of a metaobject on the specified slot. A clone is a
 * copy of the object.
 *
 * Clones are cached, so that they can be reused with subsquent operations.
 */
CK_RV
meta_object_get_clone(meta_object_t *object,
    CK_ULONG slot_num, slot_session_t *slot_session,
    slot_object_t **clone)
{
    CK_RV rv = CKR_OK;
    slot_object_t *newclone = NULL;

    /* Does a clone already exist? */
    if (object->clones[slot_num] != NULL) {
        *clone = object->clones[slot_num];
        return (CKR_OK);
    }

    if ((object->isSensitive) && (object->isToken) &&
        (!metaslot_auto_key_migrate)) {
        /*
         * if the object is a sensitive token object, and auto
         * key migrate is not allowed, will not create the clone
         * in another slot
         */
        return (CKR_FUNCTION_FAILED);
    }

    /* object attributes can't be extracted and attributes are not known */
    if ((!object->isExtractable) && (object->attributes == NULL)) {
        return (CKR_FUNCTION_FAILED);
    }

    /*
     * has an attempt already been made to create this object in
     * slot?  If yes, and there's no clone, as indicated above,
     * that means this object can't be created in this slot.
     */
    if (object->tried_create_clone[slot_num]) {
        return (CKR_FUNCTION_FAILED);
    }
    (void) pthread_mutex_lock(&object->clone_create_lock);

    /* Maybe someone just created one? */
    if (object->clones[slot_num] != NULL) {
        *clone = object->clones[slot_num];
        goto finish;
    }


    rv = meta_slot_object_alloc(&newclone);
    if (rv != CKR_OK)
        goto finish;

    object->tried_create_clone[slot_num] = B_TRUE;

    if (object->isSensitive) {
        rv = clone_by_wrap(object, newclone, slot_session);
    } else {
        rv = clone_by_create(object, newclone, slot_session);
    }

    if (rv != CKR_OK) {
        goto finish;
    }

    object->clones[slot_num] = newclone;
    meta_slot_object_activate(newclone, slot_session, object->isToken);

    *clone = newclone;
    newclone = NULL;
finish:
    (void) pthread_mutex_unlock(&object->clone_create_lock);

    if (newclone)
        meta_slot_object_dealloc(newclone);

    return (rv);
}


/*
 * meta_setup_clone_template
 *
 * Create a clone template for the specified object.
 */
static CK_RV
meta_clone_template_setup(meta_object_t *object,
    const generic_attr_t *attributes, size_t num_attributes)
{
    CK_RV rv = CKR_OK;
    CK_ATTRIBUTE *clone_template;
    size_t i, c = 0;

    clone_template = malloc(num_attributes * sizeof (CK_ATTRIBUTE));
    if (clone_template == NULL) {
        rv = CKR_HOST_MEMORY;
        goto finish;
    }

    /* Don't allow attributes to change while we look at them. */
    (void) pthread_rwlock_rdlock(&object->attribute_lock);

    for (i = 0; i < num_attributes; i++) {
        if (!attributes[i].isCloneAttr) {
            continue;
        }
        if ((!(attributes[i].hasValueForClone)) &&
            (attributes[i].canBeEmptyValue)) {
            continue;
        }

        clone_template[c].type = attributes[i].attribute.type;
        clone_template[c].ulValueLen =
                attributes[i].attribute.ulValueLen;
        /* Allocate space to store the attribute value. */
        clone_template[c].pValue = malloc(clone_template[c].ulValueLen);
        if (clone_template[c].pValue == NULL) {
            rv = CKR_HOST_MEMORY;
            (void) pthread_rwlock_unlock(&object->attribute_lock);
            goto finish;
        }

        (void) memcpy(clone_template[c].pValue,
            object->attributes[i].attribute.pValue,
            clone_template[c].ulValueLen);
        c++;
    }

    (void) pthread_rwlock_unlock(&object->attribute_lock);

    object->clone_template = clone_template;
    object->clone_template_size = c;

finish:
    return (rv);
}


/*
 * meta_object_find_by_handle
 *
 * Search for an existing metaobject, using the object handle of a clone
 * on a particular slot.
 *
 * Returns a matching metaobject, or NULL if no match was found.
 */
meta_object_t *
meta_object_find_by_handle(CK_OBJECT_HANDLE hObject, CK_ULONG slotnum,
    boolean_t token_only)
{
    meta_object_t *object = NULL, *tmp_obj;
    meta_session_t *session;

    if (!token_only) {
        (void) pthread_rwlock_rdlock(&meta_sessionlist_lock);
        session = meta_sessionlist_head;
        while (session != NULL) {
            /* lock the objects list while we look at it */
            (void) pthread_rwlock_rdlock(
                &(session->object_list_lock));
            tmp_obj = session->object_list_head;
            while (tmp_obj != NULL) {
                slot_object_t *slot_object;

                (void) pthread_rwlock_rdlock(
                    &(tmp_obj->object_lock));
                slot_object = tmp_obj->clones[slotnum];
                if (slot_object != NULL) {
                    if (slot_object->hObject == hObject) {
                        object = tmp_obj;
                    }
                }
                (void) pthread_rwlock_unlock(
                    &(tmp_obj->object_lock));
                if (object != NULL) {
                    break;
                }
                tmp_obj = tmp_obj->next;
            }
            (void) pthread_rwlock_unlock(
                &(session->object_list_lock));
            if (object != NULL) {
                break;
            }
            session = session->next;
        }
        (void) pthread_rwlock_unlock(&meta_sessionlist_lock);
    }

    if (object != NULL) {
        /* found the object, no need to look further */
        return (object);
    }

    /*
     * Look at list of token objects
     */
    (void) pthread_rwlock_rdlock(&tokenobject_list_lock);
    tmp_obj = tokenobject_list_head;

    while (tmp_obj != NULL) {
        slot_object_t *slot_object;

        (void) pthread_rwlock_rdlock(&(tmp_obj->object_lock));
        slot_object = tmp_obj->clones[slotnum];
        if (slot_object != NULL) {
            if (slot_object->hObject == hObject)
                object = tmp_obj;
        }
        (void) pthread_rwlock_unlock(&(tmp_obj->object_lock));
        if (object != NULL) {
            break;
        }
        tmp_obj = tmp_obj->next;
    }
    (void) pthread_rwlock_unlock(&tokenobject_list_lock);

    return (object);
}

CK_RV
meta_token_object_deactivate(token_obj_type_t token_type)
{
    meta_object_t *object, *tmp_object;
    CK_RV save_rv = CKR_OK, rv;

    /* get a write lock on the token object list */
    (void) pthread_rwlock_wrlock(&tokenobject_list_lock);

    object = tokenobject_list_head;

    /* go through each object and delete the one with matching type */
    while (object != NULL) {
        tmp_object = object->next;

        if ((token_type == ALL_TOKEN) ||
            ((object->isPrivate) && (token_type == PRIVATE_TOKEN)) ||
            ((!object->isPrivate) && (token_type == PUBLIC_TOKEN))) {
            rv = meta_object_deactivate(object, B_TRUE, B_FALSE);
            if ((rv != CKR_OK) && (save_rv == CKR_OK)) {
                save_rv = rv;
                goto finish;
            }
            rv = meta_object_dealloc(object, B_FALSE);
            if ((rv != CKR_OK) && (save_rv == CKR_OK)) {
                save_rv = rv;
                goto finish;
            }
        }
        object = tmp_object;
    }
finish:
    (void) pthread_rwlock_unlock(&tokenobject_list_lock);
    return (save_rv);
}

/*
 * This function adds the to-be-freed meta object to a linked list.
 * When the number of objects queued in the linked list reaches the
 * maximum threshold MAX_OBJ_TO_BE_FREED, it will free the first
 * object (FIFO) in the list.
 */
void
meta_object_delay_free(meta_object_t *objp)
{
    meta_object_t *tmp;

    (void) pthread_mutex_lock(&obj_delay_freed.obj_to_be_free_mutex);

    /* Add the newly deleted object at the end of the list */
    objp->next = NULL;
    if (obj_delay_freed.first == NULL) {
        obj_delay_freed.last = objp;
        obj_delay_freed.first = objp;
    } else {
        obj_delay_freed.last->next = objp;
        obj_delay_freed.last = objp;
    }

    if (++obj_delay_freed.count >= MAX_OBJ_TO_BE_FREED) {
        /*
         * Free the first object in the list only if
         * the total count reaches maximum threshold.
         */
        obj_delay_freed.count--;
        tmp = obj_delay_freed.first->next;
        free(obj_delay_freed.first);
        obj_delay_freed.first = tmp;
    }
    (void) pthread_mutex_unlock(&obj_delay_freed.obj_to_be_free_mutex);
}