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authorGravatar Martin Szulecki2013-04-25 17:43:54 +0100
committerGravatar Martin Szulecki2013-04-25 17:43:54 +0100
commit4748e1ac72ede8ba1f7a28ec8c1b8d5bb0f0afd3 (patch)
tree708d1ec3ee0fcc3a3f49be45457c5f641c108dc2 /common/userpref.c
parent927c34ee8e6974a34b1dfd7d1a4fde5eabbeca7a (diff)
downloadlibimobiledevice-4748e1ac72ede8ba1f7a28ec8c1b8d5bb0f0afd3.tar.gz
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common: Move debug and userpref code into libinternalcommon
Diffstat (limited to 'common/userpref.c')
-rw-r--r--common/userpref.c1161
1 files changed, 1161 insertions, 0 deletions
diff --git a/common/userpref.c b/common/userpref.c
new file mode 100644
index 0000000..0e774b7
--- /dev/null
+++ b/common/userpref.c
@@ -0,0 +1,1161 @@
+/*
+ * 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
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_OPENSSL
+#include <openssl/pem.h>
+#include <openssl/rsa.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#else
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+#include <gcrypt.h>
+#endif
+
+#include <dirent.h>
+#include <libgen.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#ifdef WIN32
+#include <shlobj.h>
+#endif
+
+#include "userpref.h"
+#include "debug.h"
+
+#define LIBIMOBILEDEVICE_CONF_DIR "libimobiledevice"
+#define LIBIMOBILEDEVICE_CONF_FILE "libimobiledevicerc"
+
+#define LIBIMOBILEDEVICE_ROOT_PRIVKEY "RootPrivateKey.pem"
+#define LIBIMOBILEDEVICE_HOST_PRIVKEY "HostPrivateKey.pem"
+#define LIBIMOBILEDEVICE_ROOT_CERTIF "RootCertificate.pem"
+#define LIBIMOBILEDEVICE_HOST_CERTIF "HostCertificate.pem"
+
+#ifdef WIN32
+#define DIR_SEP '\\'
+#define DIR_SEP_S "\\"
+#else
+#define DIR_SEP '/'
+#define DIR_SEP_S "/"
+#endif
+
+static char __config_dir[512] = {0, };
+
+#ifdef WIN32
+static char *userpref_utf16_to_utf8(wchar_t *unistr, long len, long *items_read, long *items_written)
+{
+ if (!unistr || (len <= 0)) return NULL;
+ char *outbuf = (char*)malloc(3*(len+1));
+ int p = 0;
+ int i = 0;
+
+ wchar_t wc;
+
+ while (i < len) {
+ wc = unistr[i++];
+ if (wc >= 0x800) {
+ outbuf[p++] = (char)(0xE0 + ((wc >> 12) & 0xF));
+ outbuf[p++] = (char)(0x80 + ((wc >> 6) & 0x3F));
+ outbuf[p++] = (char)(0x80 + (wc & 0x3F));
+ } else if (wc >= 0x80) {
+ outbuf[p++] = (char)(0xC0 + ((wc >> 6) & 0x1F));
+ outbuf[p++] = (char)(0x80 + (wc & 0x3F));
+ } else {
+ outbuf[p++] = (char)(wc & 0x7F);
+ }
+ }
+ if (items_read) {
+ *items_read = i;
+ }
+ if (items_written) {
+ *items_written = p;
+ }
+ outbuf[p] = 0;
+
+ return outbuf;
+}
+#endif
+
+static const char *userpref_get_tmp_dir()
+{
+ const char *cdir = getenv("TMPDIR");
+ if (cdir && cdir[0])
+ return cdir;
+ cdir = getenv("TMP");
+ if (cdir && cdir[0])
+ return cdir;
+ cdir = getenv("TEMP");
+ if (cdir && cdir[0])
+ return cdir;
+ return "/tmp";
+}
+
+static const char *userpref_get_config_dir()
+{
+ if (__config_dir[0]) return __config_dir;
+#ifdef WIN32
+ wchar_t path[MAX_PATH+1];
+ HRESULT hr;
+ LPITEMIDLIST pidl = NULL;
+ BOOL b = FALSE;
+
+ hr = SHGetSpecialFolderLocation (NULL, CSIDL_LOCAL_APPDATA, &pidl);
+ if (hr == S_OK) {
+ b = SHGetPathFromIDListW (pidl, path);
+ if (b) {
+ char *cdir = userpref_utf16_to_utf8 (path, wcslen(path), NULL, NULL);
+ strcpy(__config_dir, cdir);
+ free(cdir);
+ CoTaskMemFree (pidl);
+ }
+ }
+#else
+ const char *cdir = getenv("XDG_CONFIG_HOME");
+ if (!cdir) {
+ cdir = getenv("HOME");
+ if (!cdir || !cdir[0]) {
+ const char *tdir = userpref_get_tmp_dir();
+ strcpy(__config_dir, tdir);
+ strcat(__config_dir, DIR_SEP_S);
+ strcat(__config_dir, "root");
+ } else {
+ strcpy(__config_dir, cdir);
+ }
+ strcat(__config_dir, DIR_SEP_S);
+ strcat(__config_dir, ".config");
+ } else {
+ strcpy(__config_dir, cdir);
+ }
+#endif
+ strcat(__config_dir, DIR_SEP_S);
+ strcat(__config_dir, LIBIMOBILEDEVICE_CONF_DIR);
+
+ int i = strlen(__config_dir)-1;
+ while ((i > 0) && (__config_dir[i] == DIR_SEP)) {
+ __config_dir[i--] = '\0';
+ }
+
+ return __config_dir;
+}
+
+static int __mkdir(const char *dir, int mode)
+{
+#ifdef WIN32
+ return mkdir(dir);
+#else
+ return mkdir(dir, mode);
+#endif
+}
+
+static int mkdir_with_parents(const char *dir, int mode)
+{
+ if (!dir) return -1;
+ if (__mkdir(dir, mode) == 0) {
+ return 0;
+ } else {
+ if (errno == EEXIST) return 0;
+ }
+ int res;
+ char *parent = strdup(dir);
+ parent = dirname(parent);
+ if (parent) {
+ res = mkdir_with_parents(parent, mode);
+ } else {
+ res = -1;
+ }
+ free(parent);
+ if (res == 0) {
+ mkdir_with_parents(dir, mode);
+ }
+ return res;
+}
+
+static int config_write(const char *cfgfile, plist_t dict)
+{
+ if (!cfgfile || !dict || (plist_get_node_type(dict) != PLIST_DICT)) {
+ return -1;
+ }
+ int res = -1;
+
+#if 1 // old style config
+ plist_t hostid = plist_dict_get_item(dict, "HostID");
+ if (hostid && (plist_get_node_type(hostid) == PLIST_STRING)) {
+ char *hostidstr = NULL;
+ plist_get_string_val(hostid, &hostidstr);
+ if (hostidstr) {
+ FILE *fd = fopen(cfgfile, "wb");
+ if (fd) {
+ fprintf(fd, "\n[Global]\nHostID=%s\n", hostidstr);
+ fclose(fd);
+ res = 0;
+ } else {
+ debug_info("could not open '%s' for writing: %s", cfgfile, strerror(errno));
+ }
+ free(hostidstr);
+ }
+ }
+#endif
+#if 0
+ char *xml = NULL;
+ uint32_t length = 0;
+
+ plist_to_xml(dict, &xml, &length);
+ if (!xml) {
+ return res;
+ }
+
+ FILE *fd = fopen(cfgfile, "wb");
+ if (!fd) {
+ free(xml);
+ return res;
+ }
+
+ if (fwrite(xml, 1, length, fd) == length) {
+ res = 0;
+ } else {
+ fprintf(stderr, "%s: ERROR: failed to write configuration to '%s'\n", __func__, cfgfile);
+ }
+ fclose(fd);
+
+ free(xml);
+#endif
+ return res;
+}
+
+static int config_read(const char *cfgfile, plist_t *dict)
+{
+ if (!cfgfile || !dict) {
+ return -1;
+ }
+
+ int res = -1;
+ FILE *fd = fopen(cfgfile, "rb");
+ if (!fd) {
+ debug_info("could not open '%s' for reading: %s", cfgfile, strerror(errno));
+ return -1;
+ }
+
+ fseek(fd, 0, SEEK_END);
+ unsigned long int size = ftell(fd);
+ fseek(fd, 0, SEEK_SET);
+ unsigned char *contents = NULL;
+
+ contents = malloc(size);
+ if (fread(contents, 1, size, fd) != size) {
+ free(contents);
+ fclose(fd);
+ return -1;
+ }
+ plist_t plist = NULL;
+
+ if (!memcmp(contents, "bplist00", 8)) {
+ plist_from_bin((const char*)contents, (uint32_t)size, &plist);
+ fclose(fd);
+ } else {
+ if (memchr(contents, '<', size)) {
+ plist_from_xml((const char*)contents, (uint32_t)size, &plist);
+ }
+ if (plist) {
+ fclose(fd);
+ } else {
+ // try parsing old format config file
+ char line[256];
+ fseek(fd, 0, SEEK_SET);
+ while (fgets(line, 256, fd)) {
+ char *p = &line[0];
+ size_t llen = strlen(p)-1;
+ while ((llen > 0) && ((p[llen] == '\n') || (p[llen] == '\r'))) {
+ p[llen] = '\0';
+ llen--;
+ }
+ if (llen == 0) continue;
+ while ((p[0] == '\n') || (p[0] == '\r')) {
+ p++;
+ }
+ if (!strncmp(p, "HostID=", 7)) {
+ plist = plist_new_dict();
+ plist_dict_insert_item(plist, "HostID", plist_new_string(p+7));
+ break;
+ }
+ }
+ fclose(fd);
+#if 0
+ if (plist) {
+ // write new format config
+ config_write(cfgfile, plist);
+ }
+#endif
+ }
+ }
+ free(contents);
+ if (plist) {
+ *dict = plist;
+ res = 0;
+ }
+ return res;
+}
+
+/**
+ * Creates a freedesktop compatible configuration directory.
+ */
+static void userpref_create_config_dir(void)
+{
+ const char *config_path = userpref_get_config_dir();
+ struct stat st;
+ if (stat(config_path, &st) != 0) {
+ mkdir_with_parents(config_path, 0755);
+ }
+}
+
+static int get_rand(int min, int max)
+{
+ int retval = (rand() % (max - min)) + min;
+ return retval;
+}
+
+/**
+ * Generates a valid HostID (which is actually a UUID).
+ *
+ * @return A null terminated string containing a valid HostID.
+ */
+static char *userpref_generate_host_id()
+{
+ /* HostID's are just UUID's, and UUID's are 36 characters long */
+ char *hostid = (char *) malloc(sizeof(char) * 37);
+ 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)];
+ }
+ }
+ /* make it a real string */
+ hostid[36] = '\0';
+ return hostid;
+}
+
+/**
+ * Store HostID in config file.
+ *
+ * @param host_id A null terminated string containing a valid HostID.
+ */
+static int userpref_set_host_id(const char *host_id)
+{
+ const char *config_path;
+ char *config_file;
+
+ if (!host_id)
+ return 0;
+
+ /* Make sure config directory exists */
+ userpref_create_config_dir();
+
+ config_path = userpref_get_config_dir();
+ config_file = (char*)malloc(strlen(config_path)+1+strlen(LIBIMOBILEDEVICE_CONF_FILE)+1);
+ strcpy(config_file, config_path);
+ strcat(config_file, DIR_SEP_S);
+ strcat(config_file, LIBIMOBILEDEVICE_CONF_FILE);
+
+ /* Now parse file to get the HostID */
+ plist_t config = NULL;
+ config_read(config_file, &config);
+ if (!config) {
+ config = plist_new_dict();
+ plist_dict_insert_item(config, "HostID", plist_new_string(host_id));
+ } else {
+ plist_t n = plist_dict_get_item(config, "HostID");
+ if (n) {
+ plist_set_string_val(n, host_id);
+ } else {
+ plist_dict_insert_item(config, "HostID", plist_new_string(host_id));
+ }
+ }
+
+ /* Store in config file */
+ debug_info("setting hostID to %s", host_id);
+
+ config_write(config_file, config);
+ plist_free(config);
+
+ free(config_file);
+ return 1;
+}
+
+/**
+ * Reads the HostID from a previously generated configuration file.
+ *
+ * @note It is the responsibility of the calling function to free the returned host_id
+ *
+ * @return The string containing the HostID or NULL
+ */
+void userpref_get_host_id(char **host_id)
+{
+ const char *config_path;
+ char *config_file;
+
+ config_path = userpref_get_config_dir();
+ config_file = (char*)malloc(strlen(config_path)+1+strlen(LIBIMOBILEDEVICE_CONF_FILE)+1);
+ strcpy(config_file, config_path);
+ strcat(config_file, DIR_SEP_S);
+ strcat(config_file, LIBIMOBILEDEVICE_CONF_FILE);
+
+ /* now parse file to get the HostID */
+ plist_t config = NULL;
+ if (config_read(config_file, &config) == 0) {
+ plist_t n_host_id = plist_dict_get_item(config, "HostID");
+ if (n_host_id && (plist_get_node_type(n_host_id) == PLIST_STRING)) {
+ plist_get_string_val(n_host_id, host_id);
+ }
+ }
+ plist_free(config);
+ free(config_file);
+
+ if (!*host_id) {
+ /* no config, generate host_id */
+ *host_id = userpref_generate_host_id();
+ userpref_set_host_id(*host_id);
+ }
+
+ debug_info("Using %s as HostID", *host_id);
+}
+
+/**
+ * Determines whether this device has been connected to this system before.
+ *
+ * @param udid The device UDID as given by the device.
+ *
+ * @return 1 if the device has been connected previously to this configuration
+ * or 0 otherwise.
+ */
+int userpref_has_device_public_key(const char *udid)
+{
+ int ret = 0;
+ const char *config_path;
+ char *config_file;
+ struct stat st;
+
+ if (!udid) return 0;
+
+ /* first get config file */
+ config_path = userpref_get_config_dir();
+ config_file = (char*)malloc(strlen(config_path)+1+strlen(udid)+4+1);
+ strcpy(config_file, config_path);
+ strcat(config_file, DIR_SEP_S);
+ strcat(config_file, udid);
+ strcat(config_file, ".pem");
+
+ if ((stat(config_file, &st) == 0) && S_ISREG(st.st_mode))
+ ret = 1;
+ free(config_file);
+ return ret;
+}
+
+/**
+ * Fills a list with UDIDs of devices that have been connected to this
+ * system before, i.e. for which a public key file exists.
+ *
+ * @param list A pointer to a char** initially pointing to NULL that will
+ * hold a newly allocated list of UDIDs upon successful return.
+ * The caller is responsible for freeing the memory. Note that if
+ * no public key file was found the list has to be freed too as it
+ * points to a terminating NULL element.
+ * @param count The number of UDIDs found. This parameter can be NULL if it
+ * is not required.
+ *
+ * @return USERPREF_E_SUCCESS on success, or USERPREF_E_INVALID_ARG if the
+ * list parameter is not pointing to NULL.
+ */
+userpref_error_t userpref_get_paired_udids(char ***list, unsigned int *count)
+{
+ struct slist_t {
+ char *name;
+ void *next;
+ };
+ DIR *config_dir;
+ const char *config_path;
+ struct slist_t *udids = NULL;
+ unsigned int i;
+ unsigned int found = 0;
+
+ if (!list || (list && *list)) {
+ debug_info("ERROR: The list parameter needs to point to NULL!");
+ return USERPREF_E_INVALID_ARG;
+ }
+
+ if (count) {
+ *count = 0;
+ }
+
+ config_path = userpref_get_config_dir();
+ config_dir = opendir(config_path);
+ if (config_dir) {
+ struct dirent *entry;
+ struct slist_t *listp = udids;
+ while ((entry = readdir(config_dir))) {
+ char *ext = strstr(entry->d_name, ".pem");
+ if (ext && ((ext - entry->d_name) == 40) && (strlen(entry->d_name) == 44)) {
+ struct slist_t *ne = (struct slist_t*)malloc(sizeof(struct slist_t));
+ ne->name = (char*)malloc(41);
+ strncpy(ne->name, entry->d_name, 40);
+ ne->name[40] = 0;
+ ne->next = NULL;
+ if (!listp) {
+ listp = ne;
+ udids = listp;
+ } else {
+ listp->next = ne;
+ listp = listp->next;
+ }
+ found++;
+ }
+ }
+ closedir(config_dir);
+ }
+ *list = (char**)malloc(sizeof(char*) * (found+1));
+ i = 0;
+ while (udids) {
+ (*list)[i++] = udids->name;
+ struct slist_t *old = udids;
+ udids = udids->next;
+ free(old);
+ }
+ (*list)[i] = NULL;
+
+ if (count) {
+ *count = found;
+ }
+
+ return USERPREF_E_SUCCESS;
+}
+
+/**
+ * Mark the device (as represented by the key) as having connected to this
+ * configuration.
+ *
+ * @param udid The device UDID as given by the device
+ * @param public_key The public key given by the device
+ *
+ * @return 1 on success and 0 if no public key is given or if it has already
+ * been marked as connected previously.
+ */
+userpref_error_t userpref_set_device_public_key(const char *udid, key_data_t public_key)
+{
+ if (NULL == public_key.data)
+ return USERPREF_E_INVALID_ARG;
+
+ if (userpref_has_device_public_key(udid))
+ return USERPREF_E_SUCCESS;
+
+ /* ensure config directory exists */
+ userpref_create_config_dir();
+
+ /* build file path */
+ const char *config_path = userpref_get_config_dir();
+ char *pem = (char*)malloc(strlen(config_path)+1+strlen(udid)+4+1);
+ strcpy(pem, config_path);
+ strcat(pem, DIR_SEP_S);
+ strcat(pem, udid);
+ strcat(pem, ".pem");
+
+ /* store file */
+ FILE *pFile = fopen(pem, "wb");
+ if (pFile) {
+ fwrite(public_key.data, 1, public_key.size, pFile);
+ fclose(pFile);
+ } else {
+ debug_info("could not open '%s' for writing: %s", pem, strerror(errno));
+ }
+ free(pem);
+
+ return USERPREF_E_SUCCESS;
+}
+
+/**
+ * Remove the public key stored for the device with udid from this host.
+ *
+ * @param udid The udid of the device
+ *
+ * @return USERPREF_E_SUCCESS on success.
+ */
+userpref_error_t userpref_remove_device_public_key(const char *udid)
+{
+ if (!userpref_has_device_public_key(udid))
+ return USERPREF_E_SUCCESS;
+
+ /* build file path */
+ const char *config_path = userpref_get_config_dir();
+ char *pem = (char*)malloc(strlen(config_path)+1+strlen(udid)+4+1);
+ strcpy(pem, config_path);
+ strcat(pem, DIR_SEP_S);
+ strcat(pem, udid);
+ strcat(pem, ".pem");
+
+ /* remove file */
+ remove(pem);
+
+ free(pem);
+
+ return USERPREF_E_SUCCESS;
+}
+
+/**
+ * Private function which reads the given file into a key_data_t structure.
+ *
+ * @param file The filename of the file to read
+ * @param data The pointer at which to store the data.
+ *
+ * @return 1 if the file contents where read successfully and 0 otherwise.
+ */
+static int userpref_get_file_contents(const char *file, key_data_t * data)
+{
+ int success = 0;
+ unsigned long int size = 0;
+ unsigned char *content = NULL;
+ const char *config_path;
+ char *filepath;
+ FILE *fd;
+
+ if (NULL == file || NULL == data)
+ return 0;
+
+ /* Read file */
+ config_path = userpref_get_config_dir();
+ filepath = (char*)malloc(strlen(config_path)+1+strlen(file)+1);
+ strcpy(filepath, config_path);
+ strcat(filepath, DIR_SEP_S);
+ strcat(filepath, file);
+
+ fd = fopen(filepath, "rb");
+ if (fd) {
+ fseek(fd, 0, SEEK_END);
+ size = ftell(fd);
+ fseek(fd, 0, SEEK_SET);
+
+ // prevent huge files
+ if (size > 0xFFFFFF) {
+ fprintf(stderr, "%s: file is too big (> 16MB). Refusing to read the contents to memory!", __func__);
+ } else {
+ size_t p = 0;
+ content = (unsigned char*)malloc(size);
+ while (!feof(fd)) {
+ p += fread(content+p, 1, size-p, fd);
+ if (ferror(fd) != 0) {
+ break;
+ }
+ if (p >= size) {
+ success = 1;
+ break;
+ }
+ }
+ }
+ fclose(fd);
+ }
+
+ free(filepath);
+
+ /* Add it to the key_data_t structure */
+ if (success) {
+ data->data = (uint8_t*) content;
+ data->size = size;
+ }
+
+ return success;
+}
+
+/**
+ * Private function which generate private keys and certificates.
+ *
+ * @return 1 if keys were successfully generated, 0 otherwise
+ */
+static userpref_error_t userpref_gen_keys_and_cert(void)
+{
+ userpref_error_t ret = USERPREF_E_SSL_ERROR;
+
+ key_data_t root_key_pem = { NULL, 0 };
+ key_data_t root_cert_pem = { NULL, 0 };
+ key_data_t host_key_pem = { NULL, 0 };
+ key_data_t host_cert_pem = { NULL, 0 };
+
+ debug_info("Generating keys and certificates");
+#ifdef HAVE_OPENSSL
+ RSA* root_keypair = RSA_generate_key(2048, 65537, NULL, NULL);
+ RSA* host_keypair = RSA_generate_key(2048, 65537, NULL, NULL);
+
+ EVP_PKEY* root_pkey = EVP_PKEY_new();
+ EVP_PKEY_assign_RSA(root_pkey, root_keypair);
+
+ EVP_PKEY* host_pkey = EVP_PKEY_new();
+ EVP_PKEY_assign_RSA(host_pkey, host_keypair);
+
+ /* generate root certificate */
+ X509* root_cert = X509_new();
+ {
+ /* set serial number */
+ ASN1_INTEGER* sn = ASN1_INTEGER_new();
+ ASN1_INTEGER_set(sn, 0);
+ X509_set_serialNumber(root_cert, sn);
+ ASN1_INTEGER_free(sn);
+
+ /* set version */
+ X509_set_version(root_cert, 2);
+
+ /* set x509v3 basic constraints */
+ X509_EXTENSION* ext;
+ if (!(ext = X509V3_EXT_conf_nid(NULL, NULL, NID_basic_constraints, (char*)"critical,CA:TRUE"))) {
+ debug_info("ERROR: X509V3_EXT_conf_nid failed");
+ }
+ X509_add_ext(root_cert, ext, -1);
+
+ /* set key validity */
+ ASN1_TIME* asn1time = ASN1_TIME_new();
+ ASN1_TIME_set(asn1time, time(NULL));
+ X509_set_notBefore(root_cert, asn1time);
+ ASN1_TIME_set(asn1time, time(NULL) + (60 * 60 * 24 * 365 * 10));
+ X509_set_notAfter(root_cert, asn1time);
+ ASN1_TIME_free(asn1time);
+
+ /* use root public key for root cert */
+ X509_set_pubkey(root_cert, root_pkey);
+ /* sign root cert with root private key */
+ X509_sign(root_cert, root_pkey, EVP_sha1());
+ }
+
+ /* create host certificate */
+ X509* host_cert = X509_new();
+ {
+ /* set serial number */
+ ASN1_INTEGER* sn = ASN1_INTEGER_new();
+ ASN1_INTEGER_set(sn, 0);
+ X509_set_serialNumber(host_cert, sn);
+ ASN1_INTEGER_free(sn);
+
+ /* set version */
+ X509_set_version(host_cert, 2);
+
+ /* set x509v3 basic constraints */
+ X509_EXTENSION* ext;
+ if (!(ext = X509V3_EXT_conf_nid(NULL, NULL, NID_basic_constraints, (char*)"critical,CA:FALSE"))) {
+ debug_info("ERROR: X509V3_EXT_conf_nid failed");
+ }
+ X509_add_ext(host_cert, ext, -1);
+
+ /* set x509v3 key usage */
+ if (!(ext = X509V3_EXT_conf_nid(NULL, NULL, NID_key_usage, (char*)"digitalSignature,keyEncipherment"))) {
+ debug_info("ERROR: X509V3_EXT_conf_nid failed");
+ }
+ X509_add_ext(host_cert, ext, -1);
+
+ /* set key validity */
+ ASN1_TIME* asn1time = ASN1_TIME_new();
+ ASN1_TIME_set(asn1time, time(NULL));
+ X509_set_notBefore(host_cert, asn1time);
+ ASN1_TIME_set(asn1time, time(NULL) + (60 * 60 * 24 * 365 * 10));
+ X509_set_notAfter(host_cert, asn1time);
+ ASN1_TIME_free(asn1time);
+
+ /* use host public key for host cert */
+ X509_set_pubkey(host_cert, host_pkey);
+
+ /* sign host cert with root private key */
+ X509_sign(host_cert, root_pkey, EVP_sha1());
+ }
+
+ if (root_cert && root_pkey && host_cert && host_pkey) {
+ BIO* membp;
+
+ membp = BIO_new(BIO_s_mem());
+ if (PEM_write_bio_X509(membp, root_cert) > 0) {
+ root_cert_pem.size = BIO_get_mem_data(membp, &root_cert_pem.data);
+ }
+ membp = BIO_new(BIO_s_mem());
+ if (PEM_write_bio_PrivateKey(membp, root_pkey, NULL, NULL, 0, 0, NULL) > 0) {
+ root_key_pem.size = BIO_get_mem_data(membp, &root_key_pem.data);
+ }
+ membp = BIO_new(BIO_s_mem());
+ if (PEM_write_bio_X509(membp, host_cert) > 0) {
+ host_cert_pem.size = BIO_get_mem_data(membp, &host_cert_pem.data);
+ }
+ membp = BIO_new(BIO_s_mem());
+ if (PEM_write_bio_PrivateKey(membp, host_pkey, NULL, NULL, 0, 0, NULL) > 0) {
+ host_key_pem.size = BIO_get_mem_data(membp, &host_key_pem.data);
+ }
+ }
+
+ EVP_PKEY_free(root_pkey);
+ EVP_PKEY_free(host_pkey);
+
+ X509_free(host_cert);
+ X509_free(root_cert);
+#else
+ gnutls_x509_privkey_t root_privkey;
+ gnutls_x509_crt_t root_cert;
+ gnutls_x509_privkey_t host_privkey;
+ gnutls_x509_crt_t host_cert;
+
+ gnutls_global_deinit();
+ gnutls_global_init();
+
+ //use less secure random to speed up key generation
+ gcry_control(GCRYCTL_ENABLE_QUICK_RANDOM);
+
+ 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 root key */
+ gnutls_x509_privkey_generate(root_privkey, GNUTLS_PK_RSA, 2048, 0);
+ gnutls_x509_privkey_generate(host_privkey, GNUTLS_PK_RSA, 2048, 0);
+
+ /* 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 */
+ size_t root_key_export_size = 0;
+ size_t host_key_export_size = 0;
+
+ gnutls_x509_privkey_export(root_privkey, GNUTLS_X509_FMT_PEM, NULL, &root_key_export_size);
+ gnutls_x509_privkey_export(host_privkey, GNUTLS_X509_FMT_PEM, NULL, &host_key_export_size);
+
+ root_key_pem.data = gnutls_malloc(root_key_export_size);
+ host_key_pem.data = gnutls_malloc(host_key_export_size);
+
+ gnutls_x509_privkey_export(root_privkey, GNUTLS_X509_FMT_PEM, root_key_pem.data, &root_key_export_size);
+ root_key_pem.size = root_key_export_size;
+ gnutls_x509_privkey_export(host_privkey, GNUTLS_X509_FMT_PEM, host_key_pem.data, &host_key_export_size);
+ host_key_pem.size = host_key_export_size;
+
+ size_t root_cert_export_size = 0;
+ size_t host_cert_export_size = 0;
+
+ gnutls_x509_crt_export(root_cert, GNUTLS_X509_FMT_PEM, NULL, &root_cert_export_size);
+ gnutls_x509_crt_export(host_cert, GNUTLS_X509_FMT_PEM, NULL, &host_cert_export_size);
+
+ root_cert_pem.data = gnutls_malloc(root_cert_export_size);
+ host_cert_pem.data = gnutls_malloc(host_cert_export_size);
+
+ gnutls_x509_crt_export(root_cert, GNUTLS_X509_FMT_PEM, root_cert_pem.data, &root_cert_export_size);
+ root_cert_pem.size = root_cert_export_size;
+ gnutls_x509_crt_export(host_cert, GNUTLS_X509_FMT_PEM, host_cert_pem.data, &host_cert_export_size);
+ host_cert_pem.size = host_cert_export_size;
+
+ //restore gnutls env
+ gnutls_global_deinit();
+ gnutls_global_init();
+#endif
+ if (NULL != root_cert_pem.data && 0 != root_cert_pem.size &&
+ NULL != host_cert_pem.data && 0 != host_cert_pem.size)
+ ret = USERPREF_E_SUCCESS;
+
+ /* store values in config file */
+ userpref_set_keys_and_certs( &root_key_pem, &root_cert_pem, &host_key_pem, &host_cert_pem);
+
+ if (root_key_pem.data)
+ free(root_key_pem.data);
+ if (root_cert_pem.data)
+ free(root_cert_pem.data);
+ if (host_key_pem.data)
+ free(host_key_pem.data);
+ if (host_cert_pem.data)
+ free(host_cert_pem.data);
+
+ return ret;
+}
+
+/**
+ * Private function which import the given key into a gnutls structure.
+ *
+ * @param key_name The filename of the private key to import.
+ * @param key the gnutls key structure.
+ *
+ * @return 1 if the key was successfully imported.
+ */
+#ifdef HAVE_OPENSSL
+static userpref_error_t userpref_import_key(const char* key_name, key_data_t* key)
+#else
+static userpref_error_t userpref_import_key(const char* key_name, gnutls_x509_privkey_t key)
+#endif
+{
+#ifdef HAVE_OPENSSL
+ if (!key)
+ return USERPREF_E_SUCCESS;
+#endif
+ userpref_error_t ret = USERPREF_E_INVALID_CONF;
+ key_data_t pem_key = { NULL, 0 };
+ if (userpref_get_file_contents(key_name, &pem_key)) {
+#ifdef HAVE_OPENSSL
+ key->data = (unsigned char*)malloc(pem_key.size);
+ memcpy(key->data, pem_key.data, pem_key.size);
+ key->size = pem_key.size;
+ ret = USERPREF_E_SUCCESS;
+#else
+ if (GNUTLS_E_SUCCESS == gnutls_x509_privkey_import(key, &pem_key, GNUTLS_X509_FMT_PEM))
+ ret = USERPREF_E_SUCCESS;
+ else
+ ret = USERPREF_E_SSL_ERROR;
+#endif
+ }
+ if (pem_key.data)
+ free(pem_key.data);
+ return ret;
+}
+
+/**
+ * Private function which import the given certificate into a gnutls structure.
+ *
+ * @param crt_name The filename of the certificate to import.
+ * @param cert the gnutls certificate structure.
+ *
+ * @return IDEVICE_E_SUCCESS if the certificate was successfully imported.
+ */
+#ifdef HAVE_OPENSSL
+static userpref_error_t userpref_import_crt(const char* crt_name, key_data_t* cert)
+#else
+static userpref_error_t userpref_import_crt(const char* crt_name, gnutls_x509_crt_t cert)
+#endif
+{
+#ifdef HAVE_OPENSSL
+ if (!cert)
+ return USERPREF_E_SUCCESS;
+#endif
+ userpref_error_t ret = USERPREF_E_INVALID_CONF;
+ key_data_t pem_cert = { NULL, 0 };
+
+ if (userpref_get_file_contents(crt_name, &pem_cert)) {
+#ifdef HAVE_OPENSSL
+ cert->data = (unsigned char*)malloc(pem_cert.size);
+ memcpy(cert->data, pem_cert.data, pem_cert.size);
+ cert->size = pem_cert.size;
+ ret = USERPREF_E_SUCCESS;
+#else
+ if (GNUTLS_E_SUCCESS == gnutls_x509_crt_import(cert, &pem_cert, GNUTLS_X509_FMT_PEM))
+ ret = USERPREF_E_SUCCESS;
+ else
+ ret = USERPREF_E_SSL_ERROR;
+#endif
+ }
+ if (pem_cert.data)
+ free(pem_cert.data);
+ return ret;
+}
+
+/**
+ * Function to retrieve host keys and certificates.
+ * This function trigger key generation if they do not exists yet or are invalid.
+ *
+ * @note This function can take few seconds to complete (typically 5 seconds)
+ *
+ * @param root_privkey The root private key.
+ * @param root_crt The root certificate.
+ * @param host_privkey The host private key.
+ * @param host_crt The host certificate.
+ *
+ * @return 1 if the keys and certificates were successfully retrieved, 0 otherwise
+ */
+#ifdef HAVE_OPENSSL
+userpref_error_t userpref_get_keys_and_certs(key_data_t* root_privkey, key_data_t* root_crt, key_data_t* host_privkey, key_data_t* host_crt)
+#else
+userpref_error_t userpref_get_keys_and_certs(gnutls_x509_privkey_t root_privkey, gnutls_x509_crt_t root_crt, gnutls_x509_privkey_t host_privkey, gnutls_x509_crt_t host_crt)
+#endif
+{
+ userpref_error_t ret = USERPREF_E_SUCCESS;
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_key(LIBIMOBILEDEVICE_ROOT_PRIVKEY, root_privkey);
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_key(LIBIMOBILEDEVICE_HOST_PRIVKEY, host_privkey);
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_crt(LIBIMOBILEDEVICE_ROOT_CERTIF, root_crt);
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_crt(LIBIMOBILEDEVICE_HOST_CERTIF, host_crt);
+
+ if (USERPREF_E_SUCCESS != ret) {
+ //we had problem reading or importing root cert
+ //try with a new ones.
+ ret = userpref_gen_keys_and_cert();
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_key(LIBIMOBILEDEVICE_ROOT_PRIVKEY, root_privkey);
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_key(LIBIMOBILEDEVICE_HOST_PRIVKEY, host_privkey);
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_crt(LIBIMOBILEDEVICE_ROOT_CERTIF, root_crt);
+
+ if (ret == USERPREF_E_SUCCESS)
+ ret = userpref_import_crt(LIBIMOBILEDEVICE_HOST_CERTIF, host_crt);
+ }
+
+ return ret;
+}
+
+/**
+ * Function to retrieve certificates encoded in PEM format.
+ *
+ * @param pem_root_cert The root certificate.
+ * @param pem_host_cert The host certificate.
+ *
+ * @return 1 if the certificates were successfully retrieved, 0 otherwise
+ */
+userpref_error_t userpref_get_certs_as_pem(key_data_t *pem_root_cert, key_data_t *pem_host_cert)
+{
+ if (!pem_root_cert || !pem_host_cert)
+ return USERPREF_E_INVALID_ARG;
+
+ if (userpref_get_file_contents(LIBIMOBILEDEVICE_ROOT_CERTIF, pem_root_cert) && userpref_get_file_contents(LIBIMOBILEDEVICE_HOST_CERTIF, pem_host_cert))
+ return USERPREF_E_SUCCESS;
+ else {
+ if (pem_root_cert->data) {
+ free(pem_root_cert->data);
+ pem_root_cert->size = 0;
+ }
+ if (pem_host_cert->data) {
+ free(pem_host_cert->data);
+ pem_host_cert->size = 0;
+ }
+ }
+ debug_info("configuration invalid");
+ return USERPREF_E_INVALID_CONF;
+}
+
+/**
+ * Create and save a configuration file containing the given data.
+ *
+ * @note: All fields must specified and be non-null
+ *
+ * @param root_key The root key
+ * @param root_cert The root certificate
+ * @param host_key The host key
+ * @param host_cert The host certificate
+ *
+ * @return 1 on success and 0 otherwise.
+ */
+userpref_error_t userpref_set_keys_and_certs(key_data_t * root_key, key_data_t * root_cert, key_data_t * host_key, key_data_t * host_cert)
+{
+ FILE *pFile;
+ char *pem;
+ const char *config_path;
+ userpref_error_t ret = USERPREF_E_SUCCESS;
+
+ debug_info("saving keys and certs");
+
+ if (!root_key || !host_key || !root_cert || !host_cert) {
+ debug_info("missing key or cert (root_key=%p, host_key=%p, root=cert=%p, host_cert=%p", root_key, host_key, root_cert, host_cert);
+ return USERPREF_E_INVALID_ARG;
+ }
+
+ /* Make sure config directory exists */
+ userpref_create_config_dir();
+
+ config_path = userpref_get_config_dir();
+
+ /* Now write keys and certificates to disk */
+ pem = (char*)malloc(strlen(config_path)+1+strlen(LIBIMOBILEDEVICE_ROOT_PRIVKEY)+1);
+ strcpy(pem, config_path);
+ strcat(pem, DIR_SEP_S);
+ strcat(pem, LIBIMOBILEDEVICE_ROOT_PRIVKEY);
+ pFile = fopen(pem, "wb");
+ if (pFile) {
+ fwrite(root_key->data, 1, root_key->size, pFile);
+ fclose(pFile);
+ } else {
+ debug_info("could not open '%s' for writing: %s", pem, strerror(errno));
+ ret = USERPREF_E_WRITE_ERROR;
+ }
+ free(pem);
+
+ pem = (char*)malloc(strlen(config_path)+1+strlen(LIBIMOBILEDEVICE_HOST_PRIVKEY)+1);
+ strcpy(pem, config_path);
+ strcat(pem, DIR_SEP_S);
+ strcat(pem, LIBIMOBILEDEVICE_HOST_PRIVKEY);
+ pFile = fopen(pem, "wb");
+ if (pFile) {
+ fwrite(host_key->data, 1, host_key->size, pFile);
+ fclose(pFile);
+ } else {
+ debug_info("could not open '%s' for writing: %s", pem, strerror(errno));
+ ret = USERPREF_E_WRITE_ERROR;
+ }
+ free(pem);
+
+ pem = (char*)malloc(strlen(config_path)+1+strlen(LIBIMOBILEDEVICE_ROOT_CERTIF)+1);
+ strcpy(pem, config_path);
+ strcat(pem, DIR_SEP_S);
+ strcat(pem, LIBIMOBILEDEVICE_ROOT_CERTIF);
+ pFile = fopen(pem, "wb");
+ if (pFile) {
+ fwrite(root_cert->data, 1, root_cert->size, pFile);
+ fclose(pFile);
+ } else {
+ debug_info("could not open '%s' for writing: %s", pem, strerror(errno));
+ ret = USERPREF_E_WRITE_ERROR;
+ }
+ free(pem);
+
+ pem = (char*)malloc(strlen(config_path)+1+strlen(LIBIMOBILEDEVICE_HOST_CERTIF)+1);
+ strcpy(pem, config_path);
+ strcat(pem, DIR_SEP_S);
+ strcat(pem, LIBIMOBILEDEVICE_HOST_CERTIF);
+ pFile = fopen(pem, "wb");
+ if (pFile) {
+ fwrite(host_cert->data, 1, host_cert->size, pFile);
+ fclose(pFile);
+ } else {
+ debug_info("could not open '%s' for writing: %s", pem, strerror(errno));
+ ret = USERPREF_E_WRITE_ERROR;
+ }
+ free(pem);
+
+ return ret;
+}