xref: /illumos-gate/usr/src/lib/pkcs11/pkcs11_tpm/common/loadsave.c (revision 7a088f03b431bdffa96c3b2175964d4d38420caa)

/*
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 *
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 *		      from a Contributor if it was added to the Program
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 * (C) COPYRIGHT International Business Machines Corp. 2001,2002
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "tpmtok_int.h"
#include <pwd.h>
#include <grp.h>
#include <fcntl.h>

#define	ALTERNATE_KEYSTORE_PATH "PKCS11_TPM_DIR"
#define	PWD_BUFFER_SIZE	1024

static char keystore_path[MAXPATHLEN];
static boolean_t keystore_path_initialized = 0;

TSS_HKEY hPrivateLeafKey;
static CK_RV
restore_private_token_object(TSS_HCONTEXT, CK_BYTE  *, CK_ULONG, OBJECT *);

static struct flock fl = {
	0,
	0,
	0,
	0,
	0,
	0,
	{0, 0, 0, 0}
};

static int
lockfile(int fd, int op)
{
	fl.l_type = op;
	return (fcntl(fd, F_SETLKW, &fl));
}

static char *
get_user_default_path(char *home_path)
{
	struct passwd pwd, *user_info;
	char pwdbuf[PWD_BUFFER_SIZE];

	if (getpwuid_r(getuid(), &pwd, pwdbuf, PWD_BUFFER_SIZE,
	    &user_info) != 0)
		return (NULL);

	(void) snprintf(home_path, MAXPATHLEN, "/var/tpm/pkcs11/%s",
	    user_info ? user_info->pw_name : "");

	return (home_path);
}

char *
get_tpm_keystore_path()
{
	char *env_val;
	char home_path[MAXPATHLEN];

	if (!keystore_path_initialized) {
		env_val = getenv(ALTERNATE_KEYSTORE_PATH);
		bzero(keystore_path, sizeof (keystore_path));
		/*
		 * If it isn't set or is set to the empty string use the
		 * default location.  We need to check for the empty string
		 * because some users "unset" environment variables by giving
		 * them no value, this isn't the same thing as removing it
		 * from the environment.
		 *
		 * We don't want that to attempt to open the token area.
		 */
		if ((env_val == NULL) || (strcmp(env_val, "") == 0)) {
			/* alternate path not specified, use default dir */
			char *p = get_user_default_path(home_path);
			if (p == NULL)
				return (NULL);
			(void) snprintf(keystore_path, MAXPATHLEN, "%s", p);
		} else {
			(void) snprintf(keystore_path, MAXPATHLEN, "%s",
			    env_val);
		}
		keystore_path_initialized = 1;
	}
	return (keystore_path);
}

static CK_RV
create_keystore_dir()
{
	char *ksdir = get_tpm_keystore_path();
	char objdir[MAXPATHLEN];
	CK_RV rv = 0;

	if (ksdir == NULL)
		return (CKR_FUNCTION_FAILED);

	if (mkdir(ksdir, S_IRUSR|S_IWUSR|S_IXUSR) < 0) {
		if (errno == EEXIST) {
			rv = 0;
		} else {
			return (CKR_FUNCTION_FAILED);
		}
	}
	if (rv == 0) {
		(void) snprintf(objdir, sizeof (objdir),
		    "%s/%s", ksdir, TOKEN_OBJ_DIR);

		if (mkdir(objdir, S_IRUSR|S_IWUSR|S_IXUSR) < 0) {
			if (errno == EEXIST) {
				rv = 0;
			} else {
				return (CKR_FUNCTION_FAILED);
			}
		}
	}
	return (CKR_OK);
}

static void
set_perm(int file)
{
	/*
	 * In the TPM token, with per user data stores, we don't share the token
	 * object amongst a group. In fact, we want to restrict access to
	 * a single user.
	 */
	(void) fchmod(file, S_IRUSR|S_IWUSR);
}

CK_RV
load_token_data(TSS_HCONTEXT hContext, TOKEN_DATA *td)
{
	FILE	*fp;
	CK_BYTE	fname[MAXPATHLEN];
	CK_RV	rc;
	char *p = get_tpm_keystore_path();

	if (p == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) snprintf((char *)fname, sizeof (fname),
	    "%s/%s", p, TOKEN_DATA_FILE);

	rc = XProcLock(xproclock);
	if (rc != CKR_OK)
		return (rc);

	fp = fopen((char *)fname, "r");
	if (!fp) {
		/* Better error checking added */
		if (errno == ENOENT) {
			(void) XProcUnLock(xproclock);
			rc = create_keystore_dir();
			if (rc != 0)
				goto out_nolock;

			rc = init_token_data(hContext, td);
			if (rc != CKR_OK) {
				goto out_nolock;
			}

			rc = XProcLock(xproclock);
			if (rc != CKR_OK) {
				goto out_nolock;
			}

			fp = fopen((char *)fname, "r");
			if (!fp) {
				LogError("failed opening %s for read: %s",
				    fname, (char *)strerror(errno));
				rc = CKR_FUNCTION_FAILED;
				goto out_unlock;
			}
		} else {
			/* Could not open file for some unknown reason */
			rc = CKR_FUNCTION_FAILED;
			goto out_unlock;
		}
	}
	if (lockfile(fileno(fp), F_RDLCK)) {
		(void) fclose(fp);
		rc = CKR_FUNCTION_FAILED;
		goto out_unlock;
	}
	set_perm(fileno(fp));

	rc = fread(td, sizeof (TOKEN_DATA), 1, fp);

	(void) lockfile(fileno(fp), F_UNLCK);
	(void) fclose(fp);

	if (rc == 0)
		rc = CKR_FUNCTION_FAILED;
	else
		rc = CKR_OK;

out_unlock:
	(void) XProcUnLock(xproclock);

out_nolock:
	return (rc);
}

CK_RV
save_token_data(TOKEN_DATA *td)
{
	FILE	*fp;
	CK_RV	rc;
	CK_BYTE	fname[MAXPATHLEN];
	char *p = get_tpm_keystore_path();

	if (p == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) snprintf((char *)fname, sizeof (fname),
	    "%s/%s", p, TOKEN_DATA_FILE);

	rc = XProcLock(xproclock);
	if (rc != CKR_OK)
		goto out_nolock;

	fp = fopen((char *)fname, "w");

	if (!fp) {
		rc = CKR_FUNCTION_FAILED;
		goto done;
	}
	if (lockfile(fileno(fp), F_WRLCK)) {
		rc = CKR_FUNCTION_FAILED;
		(void) fclose(fp);
		goto done;
	}
	set_perm(fileno(fp));

	(void) fwrite(td, sizeof (TOKEN_DATA), 1, fp);
	(void) lockfile(fileno(fp), F_UNLCK);
	(void) fclose(fp);

	rc = CKR_OK;
done:
	(void) XProcUnLock(xproclock);

out_nolock:
	return (rc);
}

CK_RV
save_token_object(TSS_HCONTEXT hContext, OBJECT *obj)
{
	FILE	*fp = NULL;
	CK_BYTE	line[100];
	CK_RV	rc;
	CK_BYTE	fname[MAXPATHLEN];
	char *p = get_tpm_keystore_path();

	if (p == NULL)
		return (CKR_FUNCTION_FAILED);

	if (object_is_private(obj) == TRUE)
		rc = save_private_token_object(hContext, obj);
	else
		rc = save_public_token_object(obj);

	if (rc != CKR_OK)
		return (rc);

	(void) snprintf((char *)fname, sizeof (fname),
	    "%s/%s/%s", p, TOKEN_OBJ_DIR, TOKEN_OBJ_INDEX_FILE);

	fp = fopen((char *)fname, "r");
	if (fp) {
		if (lockfile(fileno(fp), F_RDLCK)) {
			(void) fclose(fp);
			return (CKR_FUNCTION_FAILED);
		}
		set_perm(fileno(fp));
		while (!feof(fp)) {
			(void) fgets((char *)line, 50, fp);
			if (!feof(fp)) {
				line[strlen((char *)line) - 1] = 0;
				if (strcmp((char *)line,
				    (char *)(obj->name)) == 0) {
					(void) lockfile(fileno(fp), F_UNLCK);
					(void) fclose(fp);
					return (CKR_OK);
				}
			}
		}
		(void) lockfile(fileno(fp), F_UNLCK);
		(void) fclose(fp);
	}

	fp = fopen((char *)fname, "a");
	if (!fp)
		return (CKR_FUNCTION_FAILED);

	if (lockfile(fileno(fp), F_WRLCK)) {
		(void) fclose(fp);
		return (CKR_FUNCTION_FAILED);
	}
	set_perm(fileno(fp));

	(void) fprintf(fp, "%s\n", obj->name);
	(void) lockfile(fileno(fp), F_UNLCK);
	(void) fclose(fp);

	return (CKR_OK);
}

CK_RV
save_public_token_object(OBJECT *obj)
{
	FILE	*fp = NULL;
	CK_BYTE	*cleartxt = NULL;
	CK_BYTE	fname[MAXPATHLEN];
	CK_ULONG	cleartxt_len;
	CK_BBOOL	flag = FALSE;
	CK_RV	rc;
	CK_ULONG	total_len;
	char *p = get_tpm_keystore_path();

	if (p == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) snprintf((char *)fname, sizeof (fname),
	    "%s/%s/%s", p, TOKEN_OBJ_DIR, obj->name);

	rc = object_flatten(obj, &cleartxt, &cleartxt_len);
	if (rc != CKR_OK)
		goto error;

	fp = fopen((char *)fname, "w");
	if (!fp) {
		LogError("Error opening %s - %s", fname,
		    (char *)strerror(errno));
		rc = CKR_FUNCTION_FAILED;
		goto error;
	}
	if (lockfile(fileno(fp), F_WRLCK)) {
		(void) fclose(fp);
		return (CKR_FUNCTION_FAILED);
	}

	set_perm(fileno(fp));

	total_len = cleartxt_len + sizeof (CK_ULONG) + sizeof (CK_BBOOL);

	(void) fwrite(&total_len, sizeof (CK_ULONG), 1, fp);
	(void) fwrite(&flag, sizeof (CK_BBOOL), 1, fp);
	(void) fwrite(cleartxt, cleartxt_len, 1, fp);

	(void) lockfile(fileno(fp), F_UNLCK);
	(void) fclose(fp);
	free(cleartxt);

	return (CKR_OK);

error:
	if (fp)
		(void) fclose(fp);
	if (cleartxt)
		free(cleartxt);
	return (rc);
}

CK_RV
save_private_token_object(TSS_HCONTEXT hContext, OBJECT *obj)
{
	FILE *fp = NULL;
	CK_BYTE	*obj_data  = NULL;
	CK_BYTE	*cleartxt  = NULL;
	CK_BYTE	*ciphertxt = NULL;
	CK_BYTE	*ptr = NULL;
	CK_BYTE	fname[100];
	CK_BYTE	hash_sha[SHA1_DIGEST_LENGTH];
	CK_ULONG obj_data_len, cleartxt_len, ciphertxt_len;
	CK_ULONG	padded_len;
	CK_BBOOL	flag;
	CK_RV	rc;
	CK_ULONG	obj_data_len_32;
	CK_ULONG	total_len;
	CK_ULONG	chunksize, blocks;
	char 		*p = get_tpm_keystore_path();

	if (p == NULL)
		return (CKR_FUNCTION_FAILED);

	rc = object_flatten(obj, &obj_data, &obj_data_len);
	obj_data_len_32 = obj_data_len;
	if (rc != CKR_OK) {
		goto error;
	}
	/*
	 * format for the object file:
	 *    private flag
	 *	---- begin encrypted part	<--+
	 *	length of object data		|
	 *	object data			+---- sensitive part
	 *	SHA of (object data)		|
	 *	---- end encrypted part		<--+
	 */
	if ((rc = compute_sha(obj_data, obj_data_len, hash_sha)) != CKR_OK)
		goto error;

	/*
	 * RSA OAEP crypto uses chunks smaller than the max to make room
	 * for the hashes.
	 * chunksize = RSA_Modulus_Size - (2 * SHA1_DIGEST_SIZE + 2) - (4 - 1)
	 * == 209
	 */
	chunksize = RSA_BLOCK_SIZE - (2 * SHA1_DIGEST_LENGTH + 2) - 5;

	cleartxt_len = sizeof (CK_ULONG) + obj_data_len_32 + SHA1_DIGEST_LENGTH;

	blocks = cleartxt_len / chunksize + ((cleartxt_len % chunksize) > 0);
	padded_len   = RSA_BLOCK_SIZE * blocks;

	cleartxt  = (CK_BYTE *)malloc(padded_len);
	ciphertxt = (CK_BYTE *)malloc(padded_len);
	if (!cleartxt || !ciphertxt) {
		rc = CKR_HOST_MEMORY;
		goto error;
	}

	ciphertxt_len = padded_len;

	ptr = cleartxt;
	(void) memcpy(ptr, &obj_data_len_32, sizeof (CK_ULONG));
	ptr += sizeof (CK_ULONG);
	(void) memcpy(ptr,  obj_data, obj_data_len_32);
	ptr += obj_data_len_32;
	(void) memcpy(ptr, hash_sha, SHA1_DIGEST_LENGTH);

	(void) add_pkcs_padding(cleartxt + cleartxt_len, RSA_BLOCK_SIZE,
	    cleartxt_len, padded_len);

	/* the encrypt function will compute the padded length */
	rc = tpm_encrypt_data(hContext, hPrivateLeafKey, cleartxt, cleartxt_len,
	    ciphertxt, &ciphertxt_len);

	if (rc != CKR_OK) {
		goto error;
	}

	(void) snprintf((char *)fname, sizeof (fname),
	    "%s/%s/%s", p, TOKEN_OBJ_DIR, obj->name);

	fp = fopen((char *)fname, "w");
	if (!fp) {
		rc = CKR_FUNCTION_FAILED;
		goto error;
	}
	if (lockfile(fileno(fp), F_WRLCK)) {
		rc = CKR_FUNCTION_FAILED;
		goto error;
	}

	set_perm(fileno(fp));

	total_len = sizeof (CK_ULONG) + sizeof (CK_BBOOL) + ciphertxt_len;

	flag = TRUE;

	(void) fwrite(&total_len, sizeof (CK_ULONG), 1, fp);
	(void) fwrite(&flag, sizeof (CK_BBOOL), 1, fp);
	(void) fwrite(ciphertxt, ciphertxt_len,    1, fp);

	(void) lockfile(fileno(fp), F_UNLCK);
	(void) fclose(fp);

	free(obj_data);
	free(cleartxt);
	free(ciphertxt);
	return (CKR_OK);

error:
	if (fp)
		(void) fclose(fp);
	if (obj_data)
		free(obj_data);
	if (cleartxt)
		free(cleartxt);
	if (ciphertxt)
		free(ciphertxt);

	return (rc);
}

CK_RV
load_public_token_objects(void)
{
	FILE	*fp1 = NULL, *fp2 = NULL;
	CK_BYTE *buf = NULL;
	CK_BYTE tmp[MAXPATHLEN], fname[MAXPATHLEN], iname[MAXPATHLEN];
	CK_BBOOL priv;
	CK_ULONG size;
	char *ksdir = get_tpm_keystore_path();

	if (ksdir == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) snprintf((char *)iname, sizeof (iname),
	    "%s/%s/%s", ksdir,
	    TOKEN_OBJ_DIR, TOKEN_OBJ_INDEX_FILE);

	fp1 = fopen((char *)iname, "r");
	if (!fp1)
		return (CKR_OK);  // no token objects

	if (lockfile(fileno(fp1), F_RDLCK)) {
		(void) fclose(fp1);
		return (CKR_FUNCTION_FAILED);
	}

	while (!feof(fp1)) {
		(void) fgets((char *)tmp, 50, fp1);
		if (feof(fp1))
			break;

		tmp[strlen((char *)tmp) - 1] = 0;

		(void) snprintf((char *)fname, sizeof (fname),
		    "%s/%s/", ksdir, TOKEN_OBJ_DIR);

		(void) strncat((char *)fname, (const char *)tmp,
		    (size_t)sizeof (fname));

		fp2 = fopen((char *)fname, "r");
		if (!fp2)
			continue;

		(void) fread(&size, sizeof (CK_ULONG), 1, fp2);
		(void) fread(&priv, sizeof (CK_BBOOL), 1, fp2);
		if (priv == TRUE) {
			(void) fclose(fp2);
			continue;
		}

		size = size - sizeof (CK_ULONG) - sizeof (CK_BBOOL);
		buf = (CK_BYTE *)malloc(size);
		if (!buf) {
			(void) lockfile(fileno(fp1), F_UNLCK);
			(void) fclose(fp1);
			(void) fclose(fp2);
			return (CKR_HOST_MEMORY);
		}

		(void) fread(buf, size, 1, fp2);

		if (pthread_mutex_lock(&obj_list_mutex)) {
			(void) lockfile(fileno(fp1), F_UNLCK);
			(void) fclose(fp1);
			(void) fclose(fp2);
			free(buf);
			return (CKR_FUNCTION_FAILED);
		}

		(void) object_mgr_restore_obj(buf, NULL);

		(void) pthread_mutex_unlock(&obj_list_mutex);
		free(buf);
		(void) fclose(fp2);
	}
	(void) lockfile(fileno(fp1), F_UNLCK);
	(void) fclose(fp1);

	return (CKR_OK);
}

CK_RV
load_private_token_objects(TSS_HCONTEXT hContext)
{
	FILE *fp1 = NULL, *fp2 = NULL;
	CK_BYTE *buf = NULL;
	CK_BYTE tmp[MAXPATHLEN], fname[MAXPATHLEN], iname[MAXPATHLEN];
	CK_BBOOL priv;
	CK_ULONG size;
	CK_RV rc;
	char *ksdir = get_tpm_keystore_path();

	if (ksdir == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) snprintf((char *)iname, sizeof (iname),
	    "%s/%s/%s", ksdir, TOKEN_OBJ_DIR, TOKEN_OBJ_INDEX_FILE);

	fp1 = fopen((char *)iname, "r");
	if (!fp1)
		return (CKR_OK);

	if (lockfile(fileno(fp1), F_RDLCK)) {
		rc = CKR_FUNCTION_FAILED;
		goto error;
	}

	while (!feof(fp1)) {
		(void) fgets((char *)tmp, sizeof (tmp), fp1);
		if (feof(fp1))
			break;

		tmp[strlen((char *)tmp) - 1] = 0;

		(void) snprintf((char *)fname, sizeof (fname),
		    "%s/%s/%s", ksdir, TOKEN_OBJ_DIR, tmp);

		fp2 = fopen((char *)fname, "r");
		if (!fp2)
			continue;

		(void) fread(&size, sizeof (CK_ULONG), 1, fp2);
		(void) fread(&priv, sizeof (CK_BBOOL), 1, fp2);
		if (priv == FALSE) {
			(void) fclose(fp2);
			continue;
		}

		size = size - sizeof (CK_ULONG) - sizeof (CK_BBOOL);
		buf = (CK_BYTE *)malloc(size);
		if (!buf) {
			rc = CKR_HOST_MEMORY;
			goto error;
		}

		rc = fread((char *)buf, size, 1, fp2);
		if (rc != 1) {
			rc = CKR_FUNCTION_FAILED;
			goto error;
		}

		if (pthread_mutex_lock(&obj_list_mutex)) {
			rc = CKR_FUNCTION_FAILED;
			goto error;
		}
		rc = restore_private_token_object(hContext, buf, size, NULL);
		(void) pthread_mutex_unlock(&obj_list_mutex);
		if (rc != CKR_OK)
			goto error;

		free(buf);
		(void) fclose(fp2);
	}
	(void) lockfile(fileno(fp1), F_UNLCK);
	(void) fclose(fp1);

	return (CKR_OK);

error:
	if (buf)
		free(buf);
	if (fp1) {
		(void) lockfile(fileno(fp1), F_UNLCK);
		(void) fclose(fp1);
	}
	if (fp2)
		(void) fclose(fp2);
	return (rc);
}

static CK_RV
restore_private_token_object(
	TSS_HCONTEXT hContext,
	CK_BYTE  *data,
	CK_ULONG len,
	OBJECT   *pObj)
{
	CK_BYTE * cleartxt  = NULL;
	CK_BYTE * obj_data  = NULL;
	CK_BYTE *ptr = NULL;
	CK_BYTE hash_sha[SHA1_DIGEST_LENGTH];
	CK_ULONG cleartxt_len, obj_data_len;
	CK_RV rc;

	/*
	 * format for the object data:
	 *    (private flag has already been read at this point)
	 *    ---- begin encrypted part
	 *	length of object data
	 *	object data
	 *	SHA of object data
	 *    ---- end encrypted part
	 */

	cleartxt_len = len;

	cleartxt = (CK_BYTE *)malloc(len);
	if (!cleartxt) {
		rc = CKR_HOST_MEMORY;
		goto done;
	}

	rc = tpm_decrypt_data(hContext, hPrivateLeafKey, data, len,
	    cleartxt, &len);

	if (rc != CKR_OK) {
		goto done;
	}

	(void) strip_pkcs_padding(cleartxt, len, &cleartxt_len);

	if (cleartxt_len > len) {
		rc = CKR_FUNCTION_FAILED;
		goto done;
	}

	ptr = cleartxt;

	bcopy(ptr, &obj_data_len, sizeof (CK_ULONG));
	ptr += sizeof (CK_ULONG);
	obj_data = ptr;

	if ((rc = compute_sha(ptr, obj_data_len, hash_sha)) != CKR_OK)
		goto done;
	ptr += obj_data_len;

	if (memcmp(ptr, hash_sha, SHA1_DIGEST_LENGTH) != 0) {
		rc = CKR_FUNCTION_FAILED;
		goto done;
	}

	(void) object_mgr_restore_obj(obj_data, pObj);
	rc = CKR_OK;
done:
	if (cleartxt)
		free(cleartxt);

	return (rc);
}

CK_RV
reload_token_object(TSS_HCONTEXT hContext, OBJECT *obj)
{
	FILE *fp = NULL;
	CK_BYTE *buf = NULL;
	CK_BYTE fname[MAXPATHLEN];
	CK_BBOOL priv;
	CK_ULONG size;
	CK_ULONG size_64;
	CK_RV rc;
	char *p = get_tpm_keystore_path();

	if (p == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) memset((char *)fname, 0x0, sizeof (fname));

	(void) snprintf((char *)fname, sizeof (fname),
	    "%s/%s/", p, TOKEN_OBJ_DIR);

	(void) strncat((char *)fname, (char *)obj->name, sizeof (fname));

	fp = fopen((char *)fname, "r");
	if (!fp) {
		rc = CKR_FUNCTION_FAILED;
		goto done;
	}
	if (lockfile(fileno(fp), F_RDLCK)) {
		rc = CKR_FUNCTION_FAILED;
		goto done;
	}

	set_perm(fileno(fp));

	(void) fread(&size, sizeof (CK_ULONG), 1, fp);
	(void) fread(&priv, sizeof (CK_BBOOL), 1, fp);

	size = size - sizeof (CK_ULONG) - sizeof (CK_BBOOL);

	buf = (CK_BYTE *)malloc(size);
	if (!buf) {
		rc = CKR_HOST_MEMORY;
		goto done;
	}

	(void) fread(buf, size, 1, fp);

	size_64 = size;

	if (priv) {
		rc = restore_private_token_object(hContext, buf, size_64, obj);
	} else {
		rc = object_mgr_restore_obj(buf, obj);
	}

done:
	if (fp) {
		(void) lockfile(fileno(fp), F_UNLCK);
		(void) fclose(fp);
	}
	if (buf)
		free(buf);
	return (rc);
}

static int
islink(char *fname)
{
	struct stat st;

	if (stat((const char *)fname, &st))
		return (-1);
	else if (S_ISLNK(st.st_mode))
		return (1);
	return (0);
}

CK_RV
delete_token_object(OBJECT *obj)
{
	FILE *fp1, *fp2;
	CK_BYTE line[100];
	char objidx[MAXPATHLEN], idxtmp[MAXPATHLEN], fname[MAXPATHLEN];
	char *ksdir = get_tpm_keystore_path();

	if (ksdir == NULL)
		return (CKR_FUNCTION_FAILED);

	(void) snprintf(objidx, sizeof (objidx),
	    "%s/%s/%s", ksdir, TOKEN_OBJ_DIR, TOKEN_OBJ_INDEX_FILE);

	(void) snprintf(idxtmp, sizeof (idxtmp),
	    "%s/IDX.TMP", ksdir, TOKEN_OBJ_DIR);

	/*
	 * If either file is a link, fail.
	 */
	if (islink(objidx) != 0)
		return (CKR_FUNCTION_FAILED);

	if (islink(idxtmp) != 0)
		return (CKR_FUNCTION_FAILED);

	fp1 = fopen(objidx, "r");
	fp2 = fopen(idxtmp, "w");
	if (!fp1 || !fp2) {
		if (fp1)
			(void) fclose(fp1);
		if (fp2)
			(void) fclose(fp2);
		return (CKR_FUNCTION_FAILED);
	}

	if (lockfile(fileno(fp1), F_RDLCK)) {
		(void) fclose(fp1);
		(void) fclose(fp2);
		return (CKR_FUNCTION_FAILED);
	}
	if (lockfile(fileno(fp2), F_WRLCK)) {
		(void) lockfile(fileno(fp1), F_UNLCK);
		(void) fclose(fp1);
		(void) fclose(fp2);
		return (CKR_FUNCTION_FAILED);
	}
	set_perm(fileno(fp2));

	while (!feof(fp1)) {
		(void) fgets((char *)line, 50, fp1);
		if (!feof(fp1)) {
			line[ strlen((char *)line)-1 ] = 0;
			if (strcmp((char *)line, (char *)obj->name))
				(void) fprintf(fp2, "%s\n", line);
		}
	}

	(void) lockfile(fileno(fp1), F_UNLCK);
	(void) lockfile(fileno(fp2), F_UNLCK);
	(void) fclose(fp1);
	(void) fclose(fp2);

	fp2 = fopen(objidx, "w");
	fp1 = fopen(idxtmp, "r");
	if (!fp1 || !fp2) {
		if (fp1)
			(void) fclose(fp1);
		if (fp2)
			(void) fclose(fp2);
		return (CKR_FUNCTION_FAILED);
	}
	if (lockfile(fileno(fp1), F_RDLCK)) {
		(void) fclose(fp1);
		(void) fclose(fp2);
		return (CKR_FUNCTION_FAILED);
	}
	if (lockfile(fileno(fp2), F_WRLCK)) {
		(void) lockfile(fileno(fp1), F_UNLCK);
		(void) fclose(fp1);
		(void) fclose(fp2);
		return (CKR_FUNCTION_FAILED);
	}

	set_perm(fileno(fp2));

	while (!feof(fp1)) {
		(void) fgets((char *)line, 50, fp1);
		if (!feof(fp1))
			(void) fprintf(fp2, "%s", (char *)line);
	}

	(void) lockfile(fileno(fp1), F_UNLCK);
	(void) lockfile(fileno(fp2), F_UNLCK);
	(void) fclose(fp1);
	(void) fclose(fp2);

	(void) snprintf(fname, sizeof (fname),
	    "%s/%s/%s", ksdir, TOKEN_OBJ_DIR, (char *)obj->name);

	(void) unlink(fname);
	return (CKR_OK);
}