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/*
* userpref.c
* contains methods to access user specific certificates IDs and more.
*
* Copyright (c) 2008 Jonathan Beck All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
#include <glib.h>
#include "libiphone/libiphone.h"
#include "userpref.h"
#include "utils.h"
/** Generates a 2048 byte key, split into a function so that it can be run in a
* thread.
*
* @param key The pointer to the desired location of the new key.
*/
static void generate_key(gpointer key)
{
gnutls_x509_privkey_generate(*((gnutls_x509_privkey_t *) key), GNUTLS_PK_RSA, 2048, 0);
g_thread_exit(0);
}
/** Simple function that generates a spinner until the mutex is released.
*/
static void progress_bar(gpointer mutex)
{
const char *spinner = "|/-\\|/-\\";
int i = 0;
while (!g_static_mutex_trylock((GStaticMutex *) mutex)) {
usleep(500000);
printf("Generating key... %c\r", spinner[i++]);
fflush(stdout);
if (i > 8)
i = 0;
}
printf("Generating key... done\n");
g_thread_exit(0);
}
int get_rand(int min, int max)
{
int retval = (rand() % (max - min)) + min;
return retval;
}
/** Generates a valid HostID (which is actually a UUID).
*
* @param A null terminated string containing a valid HostID.
*/
char *lockdownd_generate_hostid()
{
char *hostid = (char *) malloc(sizeof(char) * 37); // HostID's are just UUID's, and UUID's are 36 characters long
const char *chars = "ABCDEF0123456789";
srand(time(NULL));
int i = 0;
for (i = 0; i < 36; i++) {
if (i == 8 || i == 13 || i == 18 || i == 23) {
hostid[i] = '-';
continue;
} else {
hostid[i] = chars[get_rand(0, 16)];
}
}
hostid[36] = '\0'; // make it a real string
return hostid;
}
int main(int argc, char *argv[])
{
GThread *progress_thread, *key_thread;
GError *err;
static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
char *host_id = NULL;
gnutls_x509_privkey_t root_privkey;
gnutls_x509_privkey_t host_privkey;
gnutls_x509_crt_t root_cert;
gnutls_x509_crt_t host_cert;
iphone_set_debug(1);
// Create the thread
if (!g_thread_supported()) {
g_thread_init(NULL);
}
gnutls_global_init();
printf("This program generates keys required to connect with the iPhone\n");
printf("It only needs to be run ONCE.\n\n");
printf("Additionally it may take several minutes to run, please be patient.\n\n");
gnutls_x509_privkey_init(&root_privkey);
gnutls_x509_privkey_init(&host_privkey);
gnutls_x509_crt_init(&root_cert);
gnutls_x509_crt_init(&host_cert);
/* generate HostID */
host_id = lockdownd_generate_hostid();
/* generate root key */
g_static_mutex_lock(&mutex);
if ((key_thread = g_thread_create((GThreadFunc) generate_key, &root_privkey, TRUE, &err)) == NULL) {
printf("Thread create failed: %s!!\n", err->message);
g_error_free(err);
}
if ((progress_thread = g_thread_create((GThreadFunc) progress_bar, &mutex, TRUE, &err)) == NULL) {
printf("Thread create failed: %s!!\n", err->message);
g_error_free(err);
}
g_thread_join(key_thread);
g_static_mutex_unlock(&mutex);
g_thread_join(progress_thread);
/* generate host key */
g_static_mutex_init(&mutex);
g_static_mutex_lock(&mutex);
if ((key_thread = g_thread_create((GThreadFunc) generate_key, &host_privkey, TRUE, &err)) == NULL) {
printf("Thread create failed: %s!!\n", err->message);
g_error_free(err);
}
if ((progress_thread = g_thread_create((GThreadFunc) progress_bar, &mutex, TRUE, &err)) == NULL) {
printf("Thread create failed: %s!!\n", err->message);
g_error_free(err);
}
g_thread_join(key_thread);
g_static_mutex_unlock(&mutex);
g_thread_join(progress_thread);
/* generate certificates */
gnutls_x509_crt_set_key(root_cert, root_privkey);
gnutls_x509_crt_set_serial(root_cert, "\x00", 1);
gnutls_x509_crt_set_version(root_cert, 3);
gnutls_x509_crt_set_ca_status(root_cert, 1);
gnutls_x509_crt_set_activation_time(root_cert, time(NULL));
gnutls_x509_crt_set_expiration_time(root_cert, time(NULL) + (60 * 60 * 24 * 365 * 10));
gnutls_x509_crt_sign(root_cert, root_cert, root_privkey);
gnutls_x509_crt_set_key(host_cert, host_privkey);
gnutls_x509_crt_set_serial(host_cert, "\x00", 1);
gnutls_x509_crt_set_version(host_cert, 3);
gnutls_x509_crt_set_ca_status(host_cert, 0);
gnutls_x509_crt_set_key_usage(host_cert, GNUTLS_KEY_KEY_ENCIPHERMENT | GNUTLS_KEY_DIGITAL_SIGNATURE);
gnutls_x509_crt_set_activation_time(host_cert, time(NULL));
gnutls_x509_crt_set_expiration_time(host_cert, time(NULL) + (60 * 60 * 24 * 365 * 10));
gnutls_x509_crt_sign(host_cert, root_cert, root_privkey);
/* export to PEM format */
gnutls_datum_t root_key_pem = { NULL, 0 };
gnutls_datum_t host_key_pem = { NULL, 0 };
gnutls_x509_privkey_export(root_privkey, GNUTLS_X509_FMT_PEM, NULL, &root_key_pem.size);
gnutls_x509_privkey_export(host_privkey, GNUTLS_X509_FMT_PEM, NULL, &host_key_pem.size);
root_key_pem.data = gnutls_malloc(root_key_pem.size);
host_key_pem.data = gnutls_malloc(host_key_pem.size);
gnutls_x509_privkey_export(root_privkey, GNUTLS_X509_FMT_PEM, root_key_pem.data, &root_key_pem.size);
gnutls_x509_privkey_export(host_privkey, GNUTLS_X509_FMT_PEM, host_key_pem.data, &host_key_pem.size);
gnutls_datum_t root_cert_pem = { NULL, 0 };
gnutls_datum_t host_cert_pem = { NULL, 0 };
gnutls_x509_crt_export(root_cert, GNUTLS_X509_FMT_PEM, NULL, &root_cert_pem.size);
gnutls_x509_crt_export(host_cert, GNUTLS_X509_FMT_PEM, NULL, &host_cert_pem.size);
root_cert_pem.data = gnutls_malloc(root_cert_pem.size);
host_cert_pem.data = gnutls_malloc(host_cert_pem.size);
printf("Generating root certificate...");
gnutls_x509_crt_export(root_cert, GNUTLS_X509_FMT_PEM, root_cert_pem.data, &root_cert_pem.size);
printf("done\n");
printf("Generating host certificate...");
gnutls_x509_crt_export(host_cert, GNUTLS_X509_FMT_PEM, host_cert_pem.data, &host_cert_pem.size);
printf("done\n");
/* store values in config file */
init_config_file(host_id, &root_key_pem, &host_key_pem, &root_cert_pem, &host_cert_pem);
gnutls_free(root_key_pem.data);
gnutls_free(host_key_pem.data);
gnutls_free(root_cert_pem.data);
gnutls_free(host_cert_pem.data);
return 0;
}
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