1/*
2 * Copyright (c) 1997 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "krb5_locl.h"
35#ifdef HAVE_EXECINFO_H
36#include <execinfo.h>
37#endif
38
39KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
40_krb5_s4u2self_to_checksumdata(krb5_context context,
41			       const PA_S4U2Self *self,
42			       krb5_data *data)
43{
44    krb5_error_code ret;
45    krb5_ssize_t ssize;
46    krb5_storage *sp;
47    size_t size;
48    size_t i;
49
50    sp = krb5_storage_emem();
51    if (sp == NULL) {
52	krb5_clear_error_message(context);
53	return ENOMEM;
54    }
55    krb5_storage_set_flags(sp, KRB5_STORAGE_BYTEORDER_LE);
56    ret = krb5_store_int32(sp, self->name.name_type);
57    if (ret)
58	goto out;
59    for (i = 0; i < self->name.name_string.len; i++) {
60	size = strlen(self->name.name_string.val[i]);
61	ssize = krb5_storage_write(sp, self->name.name_string.val[i], size);
62	if (ssize != (krb5_ssize_t)size) {
63	    ret = ENOMEM;
64	    goto out;
65	}
66    }
67    size = strlen(self->realm);
68    ssize = krb5_storage_write(sp, self->realm, size);
69    if (ssize != (krb5_ssize_t)size) {
70	ret = ENOMEM;
71	goto out;
72    }
73    size = strlen(self->auth);
74    ssize = krb5_storage_write(sp, self->auth, size);
75    if (ssize != (krb5_ssize_t)size) {
76	ret = ENOMEM;
77	goto out;
78    }
79
80    ret = krb5_storage_to_data(sp, data);
81    krb5_storage_free(sp);
82    return ret;
83
84out:
85    krb5_clear_error_message(context);
86    return ret;
87}
88
89krb5_error_code
90krb5_enomem(krb5_context context)
91{
92    krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
93    return ENOMEM;
94}
95
96void
97_krb5_debug_backtrace(krb5_context context)
98{
99#if defined(HAVE_BACKTRACE) && !defined(HEIMDAL_SMALLER)
100    void *stack[128];
101    char **strs = NULL;
102    int i, frames = backtrace(stack, sizeof(stack) / sizeof(stack[0]));
103    if (frames > 0)
104	strs = backtrace_symbols(stack, frames);
105    if (strs) {
106	for (i = 0; i < frames; i++)
107	    _krb5_debugx(context, 10, "frame %d: %s", i, strs[i]);
108	free(strs);
109    }
110#endif
111}
112
113krb5_error_code
114_krb5_einval(krb5_context context, const char *func, unsigned long argn)
115{
116#ifndef HEIMDAL_SMALLER
117    krb5_set_error_message(context, EINVAL,
118			   N_("programmer error: invalid argument to %s argument %lu",
119			      "function:line"),
120			   func, argn);
121    if (_krb5_have_debug(context, 10)) {
122	_krb5_debugx(context, 10, "invalid argument to function %s argument %lu",
123		     func, argn);
124	_krb5_debug_backtrace(context);
125    }
126#endif
127    return EINVAL;
128}
129
130static const char hexchar[16] = "0123456789ABCDEF";
131
132char * KRB5_LIB_FUNCTION
133krb5_uuid_to_string(krb5_uuid uuid)
134{
135    char *string, *p;
136    size_t n;
137
138    string = malloc((sizeof(krb5_uuid) * 2) + 5);
139    if (string == NULL)
140	return NULL;
141
142    for (n = 0, p = string; n < sizeof(krb5_uuid); n++) {
143	if (n == 4 || n == 6 || n == 8 || n == 10)
144	    *p++ = '-';
145	*p++ = hexchar[uuid[n] >> 4];
146	*p++ = hexchar[uuid[n] & 0xf];
147    }
148    *p = '\0';
149    return string;
150}
151
152static int
153pos(char c)
154{
155    const char *p;
156    c = toupper((unsigned char)c);
157    for (p = hexchar; *p; p++)
158	if (*p == c)
159	    return (int)(p - hexchar);
160    return -1;
161}
162
163krb5_error_code KRB5_LIB_FUNCTION
164krb5_string_to_uuid(const char *str, krb5_uuid uuid)
165{
166    size_t n;
167
168    if (strlen(str) != 36)
169	return EINVAL;
170
171    for (n = 0; n < sizeof(krb5_uuid); n++) {
172	if (n == 4 || n == 6 || n == 8 || n == 10) {
173	    if (*str++ != '-')
174		return EINVAL;
175	}
176	uuid[n] = pos(str[0]) << 4 | pos(str[1]);
177	str += 2;
178    }
179    return 0;
180}
181