xref: /illumos-gate/usr/src/lib/libcryptoutil/common/tohexstr.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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 2002-2003 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 <sys/types.h>
30 
31 #include <cryptoutil.h>
32 
33 /*
34  * tohexstr
35  * IN	bytes
36  *	blen
37  *	hexlen should be 2 * blen + 1
38  * OUT
39  *	hexstr
40  */
41 void
42 tohexstr(uchar_t *bytes, size_t blen, char *hexstr, size_t hexlen)
43 {
44 	size_t i;
45 	char hexlist[] = "0123456789abcdef";
46 
47 	for (i = 0; i < blen; i++) {
48 		if (hexlen < (2 * i + 1))
49 			break;
50 		hexstr[2 * i] = hexlist[(bytes[i] >> 4) & 0xf];
51 		hexstr[2 * i + 1] = hexlist[bytes[i] & 0xf];
52 	}
53 	hexstr[2 * blen] = '\0';
54 }
55