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 1996-2002 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* LINTLIBRARY */
28
29 #if !defined(_BOOT) && !defined(_KERNEL)
30 #include <stdio.h>
31 #include <ctype.h>
32 #include <stdlib.h>
33 #endif /* _BOOT && _KERNEL */
34 #include <sys/types.h>
35 #include <sys/null.h>
36 #include <sys/errno.h>
37
38 #if defined(_BOOT) || defined(_KERNEL)
39 #define isdigit(c) ((c) >= '0' && c <= '9')
40 #define isxdigit(c) (isdigit(c) || (((c) >= 'a') && ((c) <= 'f')) || \
41 (((c) >= 'A') && ((c) <= 'F')))
42 #endif /* _BOOT || _KERNEL */
43
44 /*
45 * Converts an octet string into an ASCII string. The string returned is
46 * NULL-terminated, and the length recorded in blen does *not* include the
47 * null terminator (in other words, octet_to_hexascii() returns the length a'la
48 * strlen()).
49 *
50 * Returns 0 for Success, errno otherwise.
51 */
52 int
octet_to_hexascii(const void * nump,uint_t nlen,char * bufp,uint_t * blen)53 octet_to_hexascii(const void *nump, uint_t nlen, char *bufp, uint_t *blen)
54 {
55 int i;
56 char *bp;
57 const uchar_t *np;
58 static char ascii_conv[] = "0123456789ABCDEF";
59
60 if (nump == NULL || bufp == NULL || blen == NULL)
61 return (EINVAL);
62
63 if ((nlen * 2) >= *blen) {
64 *blen = 0;
65 return (E2BIG);
66 }
67 for (i = 0, bp = bufp, np = (const uchar_t *)nump; i < nlen; i++) {
68 *bp++ = ascii_conv[(np[i] >> 4) & 0x0f];
69 *bp++ = ascii_conv[np[i] & 0x0f];
70 }
71 *bp = '\0';
72 *blen = i * 2;
73 return (0);
74 }
75
76 /*
77 * Converts an ASCII string into an octet string.
78 *
79 * Returns 0 for success, errno otherwise.
80 */
81 int
hexascii_to_octet(const char * asp,uint_t alen,void * bufp,uint_t * blen)82 hexascii_to_octet(const char *asp, uint_t alen, void *bufp, uint_t *blen)
83 {
84 int i, j, k;
85 const char *tp;
86 uchar_t *u_tp;
87
88 if (asp == NULL || bufp == NULL || blen == NULL)
89 return (EINVAL);
90
91 if (alen > (*blen * 2))
92 return (E2BIG);
93
94 k = ((alen % 2) == 0) ? alen / 2 : (alen / 2) + 1;
95 for (tp = asp, u_tp = (uchar_t *)bufp, i = 0; i < k; i++, u_tp++) {
96 /* one nibble at a time */
97 for (*u_tp = 0, j = 0; j < 2; j++, tp++) {
98 if (isdigit(*tp))
99 *u_tp |= *tp - '0';
100 else if (isxdigit(*tp))
101 *u_tp |= (*tp & ~0x20) + 10 - 'A';
102 else
103 return (EINVAL);
104 if ((j % 2) == 0)
105 *u_tp <<= 4;
106 }
107 }
108 *blen = k;
109 return (0);
110 }
111