1/*	$NetBSD: der_format.c,v 1.2 2017/01/28 21:31:45 christos Exp $	*/
2
3/*
4 * Copyright (c) 2005 Kungliga Tekniska H��gskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "der_locl.h"
37#include <krb5/hex.h>
38
39__RCSID("$NetBSD: der_format.c,v 1.2 2017/01/28 21:31:45 christos Exp $");
40
41int
42der_parse_hex_heim_integer (const char *p, heim_integer *data)
43{
44    ssize_t len;
45
46    data->length = 0;
47    data->negative = 0;
48    data->data = NULL;
49
50    if (*p == '-') {
51	p++;
52	data->negative = 1;
53    }
54
55    len = strlen(p);
56    if (len <= 0) {
57	data->data = NULL;
58	data->length = 0;
59	return EINVAL;
60    }
61
62    data->length = (len / 2) + 1;
63    data->data = malloc(data->length);
64    if (data->data == NULL) {
65	data->length = 0;
66	return ENOMEM;
67    }
68
69    len = hex_decode(p, data->data, data->length);
70    if (len < 0) {
71	free(data->data);
72	data->data = NULL;
73	data->length = 0;
74	return EINVAL;
75    }
76
77    {
78	unsigned char *q = data->data;
79	while(len > 0 && *q == 0) {
80	    q++;
81	    len--;
82	}
83	data->length = len;
84	memmove(data->data, q, len);
85    }
86    return 0;
87}
88
89int
90der_print_hex_heim_integer (const heim_integer *data, char **p)
91{
92    ssize_t len;
93    char *q;
94
95    len = hex_encode(data->data, data->length, p);
96    if (len < 0)
97	return ENOMEM;
98
99    if (data->negative) {
100	len = asprintf(&q, "-%s", *p);
101	free(*p);
102	if (len < 0)
103	    return ENOMEM;
104	*p = q;
105    }
106    return 0;
107}
108
109int
110der_print_heim_oid (const heim_oid *oid, char delim, char **str)
111{
112    struct rk_strpool *p = NULL;
113    size_t i;
114
115    if (oid->length == 0)
116	return EINVAL;
117
118    for (i = 0; i < oid->length ; i++) {
119	p = rk_strpoolprintf(p, "%d", oid->components[i]);
120	if (p && i < oid->length - 1)
121	    p = rk_strpoolprintf(p, "%c", delim);
122	if (p == NULL) {
123	    *str = NULL;
124	    return ENOMEM;
125	}
126    }
127
128    *str = rk_strpoolcollect(p);
129    if (*str == NULL)
130	return ENOMEM;
131    return 0;
132}
133
134int
135der_parse_heim_oid (const char *str, const char *sep, heim_oid *data)
136{
137    char *s, *w, *brkt, *endptr;
138    unsigned int *c;
139    long l;
140
141    data->length = 0;
142    data->components = NULL;
143
144    if (sep == NULL)
145	sep = ".";
146
147    s = strdup(str);
148
149    for (w = strtok_r(s, sep, &brkt);
150	 w != NULL;
151	 w = strtok_r(NULL, sep, &brkt)) {
152
153	c = realloc(data->components,
154		    (data->length + 1) * sizeof(data->components[0]));
155	if (c == NULL) {
156	    der_free_oid(data);
157	    free(s);
158	    return ENOMEM;
159	}
160	data->components = c;
161
162	l = strtol(w, &endptr, 10);
163	if (*endptr != '\0' || l < 0 || l > INT_MAX) {
164	    der_free_oid(data);
165	    free(s);
166	    return EINVAL;
167	}
168	data->components[data->length++] = (unsigned int)l;
169    }
170    free(s);
171    return 0;
172}
173