1/*	$NetBSD: lock.c,v 1.1.1.1 2011/04/13 18:15:11 elric Exp $	*/
2
3/*
4 * Copyright (c) 2005 - 2006 Kungliga Tekniska Högskolan
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 "hx_locl.h"
37
38/**
39 * @page page_lock Locking and unlocking certificates and encrypted data.
40 *
41 * See the library functions here: @ref hx509_lock
42 */
43
44struct hx509_lock_data {
45    struct _hx509_password password;
46    hx509_certs certs;
47    hx509_prompter_fct prompt;
48    void *prompt_data;
49};
50
51static struct hx509_lock_data empty_lock_data = {
52    { 0, NULL }
53};
54
55hx509_lock _hx509_empty_lock = &empty_lock_data;
56
57/*
58 *
59 */
60
61int
62hx509_lock_init(hx509_context context, hx509_lock *lock)
63{
64    hx509_lock l;
65    int ret;
66
67    *lock = NULL;
68
69    l = calloc(1, sizeof(*l));
70    if (l == NULL)
71	return ENOMEM;
72
73    ret = hx509_certs_init(context,
74			   "MEMORY:locks-internal",
75			   0,
76			   NULL,
77			   &l->certs);
78    if (ret) {
79	free(l);
80	return ret;
81    }
82
83    *lock = l;
84
85    return 0;
86}
87
88int
89hx509_lock_add_password(hx509_lock lock, const char *password)
90{
91    void *d;
92    char *s;
93
94    s = strdup(password);
95    if (s == NULL)
96	return ENOMEM;
97
98    d = realloc(lock->password.val,
99		(lock->password.len + 1) * sizeof(lock->password.val[0]));
100    if (d == NULL) {
101	free(s);
102	return ENOMEM;
103    }
104    lock->password.val = d;
105    lock->password.val[lock->password.len] = s;
106    lock->password.len++;
107
108    return 0;
109}
110
111const struct _hx509_password *
112_hx509_lock_get_passwords(hx509_lock lock)
113{
114    return &lock->password;
115}
116
117hx509_certs
118_hx509_lock_unlock_certs(hx509_lock lock)
119{
120    return lock->certs;
121}
122
123void
124hx509_lock_reset_passwords(hx509_lock lock)
125{
126    int i;
127    for (i = 0; i < lock->password.len; i++)
128	free(lock->password.val[i]);
129    free(lock->password.val);
130    lock->password.val = NULL;
131    lock->password.len = 0;
132}
133
134int
135hx509_lock_add_cert(hx509_context context, hx509_lock lock, hx509_cert cert)
136{
137    return hx509_certs_add(context, lock->certs, cert);
138}
139
140int
141hx509_lock_add_certs(hx509_context context, hx509_lock lock, hx509_certs certs)
142{
143    return hx509_certs_merge(context, lock->certs, certs);
144}
145
146void
147hx509_lock_reset_certs(hx509_context context, hx509_lock lock)
148{
149    hx509_certs certs = lock->certs;
150    int ret;
151
152    ret = hx509_certs_init(context,
153			   "MEMORY:locks-internal",
154			   0,
155			   NULL,
156			   &lock->certs);
157    if (ret == 0)
158	hx509_certs_free(&certs);
159    else
160	lock->certs = certs;
161}
162
163int
164_hx509_lock_find_cert(hx509_lock lock, const hx509_query *q, hx509_cert *c)
165{
166    *c = NULL;
167    return 0;
168}
169
170int
171hx509_lock_set_prompter(hx509_lock lock, hx509_prompter_fct prompt, void *data)
172{
173    lock->prompt = prompt;
174    lock->prompt_data = data;
175    return 0;
176}
177
178void
179hx509_lock_reset_promper(hx509_lock lock)
180{
181    lock->prompt = NULL;
182    lock->prompt_data = NULL;
183}
184
185static int
186default_prompter(void *data, const hx509_prompt *prompter)
187{
188    if (hx509_prompt_hidden(prompter->type)) {
189	if(UI_UTIL_read_pw_string(prompter->reply.data,
190				  prompter->reply.length,
191				  prompter->prompt,
192				  0))
193	    return 1;
194    } else {
195	char *s = prompter->reply.data;
196
197	fputs (prompter->prompt, stdout);
198	fflush (stdout);
199	if(fgets(prompter->reply.data,
200		 prompter->reply.length,
201		 stdin) == NULL)
202	    return 1;
203	s[strcspn(s, "\n")] = '\0';
204    }
205    return 0;
206}
207
208int
209hx509_lock_prompt(hx509_lock lock, hx509_prompt *prompt)
210{
211    if (lock->prompt == NULL)
212	return HX509_CRYPTO_NO_PROMPTER;
213    return (*lock->prompt)(lock->prompt_data, prompt);
214}
215
216void
217hx509_lock_free(hx509_lock lock)
218{
219    if (lock) {
220	hx509_certs_free(&lock->certs);
221	hx509_lock_reset_passwords(lock);
222	memset(lock, 0, sizeof(*lock));
223	free(lock);
224    }
225}
226
227int
228hx509_prompt_hidden(hx509_prompt_type type)
229{
230    /* default to hidden if unknown */
231
232    switch (type) {
233    case HX509_PROMPT_TYPE_QUESTION:
234    case HX509_PROMPT_TYPE_INFO:
235	return 0;
236    default:
237	return 1;
238    }
239}
240
241int
242hx509_lock_command_string(hx509_lock lock, const char *string)
243{
244    if (strncasecmp(string, "PASS:", 5) == 0) {
245	hx509_lock_add_password(lock, string + 5);
246    } else if (strcasecmp(string, "PROMPT") == 0) {
247	hx509_lock_set_prompter(lock, default_prompter, NULL);
248    } else
249	return HX509_UNKNOWN_LOCK_COMMAND;
250    return 0;
251}
252