/*
 * 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 <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <security/cryptoki.h>
#include "softGlobal.h"
#include "softRandom.h"
#include "softSession.h"


CK_RV
C_SeedRandom(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pSeed, CK_ULONG ulSeedLen)
{

	CK_RV	rv;
	soft_session_t	*session_p;
	boolean_t	lock_held = B_FALSE;
	int		fd;
	long		nwrite;

	if (!softtoken_initialized)
		return (CKR_CRYPTOKI_NOT_INITIALIZED);

	/* Obtain the session pointer just for validity check. */
	rv = handle2session(hSession, &session_p);
	if (rv != CKR_OK)
		return (rv);

	SES_REFRELE(session_p, lock_held);

	if ((pSeed == NULL) || (ulSeedLen == 0)) {
		return (CKR_ARGUMENTS_BAD);
	}

	while ((fd = open(DEV_URANDOM, O_WRONLY)) < 0) {
		if (errno != EINTR)
			break;
	}
	if (fd == -1) {
		if (errno == EACCES)
			return (CKR_RANDOM_SEED_NOT_SUPPORTED);
		return (CKR_DEVICE_ERROR);
	}
	(void) fcntl(fd, F_SETFD, FD_CLOEXEC);

	nwrite = looping_write(fd, pSeed, ulSeedLen);
	if (nwrite <= 0) {
		(void) close(fd);
		return (CKR_DEVICE_ERROR);
	}

	(void) close(fd);

	return (CKR_OK);

}

CK_RV
C_GenerateRandom(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pRandomData,
    CK_ULONG ulRandomLen)
{

	CK_RV	rv;
	soft_session_t	*session_p;
	boolean_t	lock_held = B_FALSE;

	if (!softtoken_initialized)
		return (CKR_CRYPTOKI_NOT_INITIALIZED);

	/* Obtain the session pointer just for validity check. */
	rv = handle2session(hSession, &session_p);
	if (rv != CKR_OK)
		return (rv);

	SES_REFRELE(session_p, lock_held);

	if ((pRandomData == NULL) || (ulRandomLen == 0)) {
		return (CKR_ARGUMENTS_BAD);
	}

	return (soft_random_generator(pRandomData, ulRandomLen, B_FALSE));

}