17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*a7e661a2SAnthony Scarpino * Common Development and Distribution License (the "License").
6*a7e661a2SAnthony Scarpino * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
217c478bd9Sstevel@tonic-gate /*
22*a7e661a2SAnthony Scarpino * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
237c478bd9Sstevel@tonic-gate * Use is subject to license terms.
247c478bd9Sstevel@tonic-gate */
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate #include <sys/types.h>
27*a7e661a2SAnthony Scarpino #include <errno.h>
28*a7e661a2SAnthony Scarpino #include <ctype.h>
297c478bd9Sstevel@tonic-gate
307c478bd9Sstevel@tonic-gate #include <cryptoutil.h>
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate /*
337c478bd9Sstevel@tonic-gate * tohexstr
347c478bd9Sstevel@tonic-gate * IN bytes
357c478bd9Sstevel@tonic-gate * blen
367c478bd9Sstevel@tonic-gate * hexlen should be 2 * blen + 1
377c478bd9Sstevel@tonic-gate * OUT
387c478bd9Sstevel@tonic-gate * hexstr
397c478bd9Sstevel@tonic-gate */
407c478bd9Sstevel@tonic-gate void
tohexstr(uchar_t * bytes,size_t blen,char * hexstr,size_t hexlen)417c478bd9Sstevel@tonic-gate tohexstr(uchar_t *bytes, size_t blen, char *hexstr, size_t hexlen)
427c478bd9Sstevel@tonic-gate {
437c478bd9Sstevel@tonic-gate size_t i;
447c478bd9Sstevel@tonic-gate char hexlist[] = "0123456789abcdef";
457c478bd9Sstevel@tonic-gate
467c478bd9Sstevel@tonic-gate for (i = 0; i < blen; i++) {
477c478bd9Sstevel@tonic-gate if (hexlen < (2 * i + 1))
487c478bd9Sstevel@tonic-gate break;
497c478bd9Sstevel@tonic-gate hexstr[2 * i] = hexlist[(bytes[i] >> 4) & 0xf];
507c478bd9Sstevel@tonic-gate hexstr[2 * i + 1] = hexlist[bytes[i] & 0xf];
517c478bd9Sstevel@tonic-gate }
527c478bd9Sstevel@tonic-gate hexstr[2 * blen] = '\0';
537c478bd9Sstevel@tonic-gate }
54*a7e661a2SAnthony Scarpino
55*a7e661a2SAnthony Scarpino /*
56*a7e661a2SAnthony Scarpino * This function takes a char[] and length of hexadecimal values and
57*a7e661a2SAnthony Scarpino * returns a malloc'ed byte array with the length of that new byte array.
58*a7e661a2SAnthony Scarpino * The caller needs to provide a pointer to where this new malloc'ed byte array
59*a7e661a2SAnthony Scarpino * will be passed back; as well as, a pointer for the length of the new
60*a7e661a2SAnthony Scarpino * byte array.
61*a7e661a2SAnthony Scarpino *
62*a7e661a2SAnthony Scarpino * The caller is responsible for freeing the malloc'ed array when done
63*a7e661a2SAnthony Scarpino *
64*a7e661a2SAnthony Scarpino * The return code is 0 if successful, otherwise the errno value is returned.
65*a7e661a2SAnthony Scarpino */
66*a7e661a2SAnthony Scarpino int
hexstr_to_bytes(char * hexstr,size_t hexlen,uchar_t ** bytes,size_t * blen)67*a7e661a2SAnthony Scarpino hexstr_to_bytes(char *hexstr, size_t hexlen, uchar_t **bytes, size_t *blen)
68*a7e661a2SAnthony Scarpino {
69*a7e661a2SAnthony Scarpino int i, ret = 0;
70*a7e661a2SAnthony Scarpino unsigned char ch;
71*a7e661a2SAnthony Scarpino uchar_t *b = NULL;
72*a7e661a2SAnthony Scarpino
73*a7e661a2SAnthony Scarpino *bytes = NULL;
74*a7e661a2SAnthony Scarpino *blen = 0;
75*a7e661a2SAnthony Scarpino
76*a7e661a2SAnthony Scarpino if (hexstr == NULL || (hexlen % 2 == 1))
77*a7e661a2SAnthony Scarpino return (EINVAL);
78*a7e661a2SAnthony Scarpino
79*a7e661a2SAnthony Scarpino if (hexstr[0] == '0' && ((hexstr[1] == 'x') || (hexstr[1] == 'X'))) {
80*a7e661a2SAnthony Scarpino hexstr += 2;
81*a7e661a2SAnthony Scarpino hexlen -= 2;
82*a7e661a2SAnthony Scarpino }
83*a7e661a2SAnthony Scarpino
84*a7e661a2SAnthony Scarpino *blen = (hexlen / 2);
85*a7e661a2SAnthony Scarpino
86*a7e661a2SAnthony Scarpino b = malloc(*blen);
87*a7e661a2SAnthony Scarpino if (b == NULL) {
88*a7e661a2SAnthony Scarpino *blen = 0;
89*a7e661a2SAnthony Scarpino return (errno);
90*a7e661a2SAnthony Scarpino }
91*a7e661a2SAnthony Scarpino
92*a7e661a2SAnthony Scarpino for (i = 0; i < hexlen; i++) {
93*a7e661a2SAnthony Scarpino ch = (unsigned char) *hexstr;
94*a7e661a2SAnthony Scarpino
95*a7e661a2SAnthony Scarpino if (!isxdigit(ch)) {
96*a7e661a2SAnthony Scarpino ret = EINVAL;
97*a7e661a2SAnthony Scarpino goto out;
98*a7e661a2SAnthony Scarpino }
99*a7e661a2SAnthony Scarpino
100*a7e661a2SAnthony Scarpino hexstr++;
101*a7e661a2SAnthony Scarpino
102*a7e661a2SAnthony Scarpino if ((ch >= '0') && (ch <= '9'))
103*a7e661a2SAnthony Scarpino ch -= '0';
104*a7e661a2SAnthony Scarpino else if ((ch >= 'A') && (ch <= 'F'))
105*a7e661a2SAnthony Scarpino ch = ch - 'A' + 10;
106*a7e661a2SAnthony Scarpino else if ((ch >= 'a') && (ch <= 'f'))
107*a7e661a2SAnthony Scarpino ch = ch - 'a' + 10;
108*a7e661a2SAnthony Scarpino
109*a7e661a2SAnthony Scarpino if (i & 1)
110*a7e661a2SAnthony Scarpino b[i/2] |= ch;
111*a7e661a2SAnthony Scarpino else
112*a7e661a2SAnthony Scarpino b[i/2] = (ch << 4);
113*a7e661a2SAnthony Scarpino }
114*a7e661a2SAnthony Scarpino
115*a7e661a2SAnthony Scarpino out:
116*a7e661a2SAnthony Scarpino if (b != NULL && ret != 0) {
117*a7e661a2SAnthony Scarpino free(b);
118*a7e661a2SAnthony Scarpino *blen = 0;
119*a7e661a2SAnthony Scarpino } else
120*a7e661a2SAnthony Scarpino *bytes = b;
121*a7e661a2SAnthony Scarpino
122*a7e661a2SAnthony Scarpino return (ret);
123*a7e661a2SAnthony Scarpino }
124