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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <stdio.h> 29 #include <string.h> 30 #include <fcntl.h> 31 #include <locale.h> 32 #include <cryptoutil.h> 33 34 #define RANDOM_DEVICE "/dev/urandom" /* random device name */ 35 36 /* 37 * Put the requested amount of random data into a preallocated buffer. 38 * Good for passphrase salts, initialization vectors. 39 */ 40 int 41 pkcs11_random_data(void *dbuf, size_t dlen) 42 { 43 int fd; 44 45 if (dbuf == NULL || dlen == 0) 46 return (0); 47 48 /* Read random data directly from /dev/urandom */ 49 if ((fd = open(RANDOM_DEVICE, O_RDONLY)) != -1) { 50 if (read(fd, dbuf, dlen) == dlen) { 51 (void) close(fd); 52 return (0); 53 } 54 (void) close(fd); 55 } 56 return (-1); 57 } 58