diff options
Diffstat (limited to 'src/userpref.c')
| -rw-r--r-- | src/userpref.c | 1161 |
1 files changed, 0 insertions, 1161 deletions
diff --git a/src/userpref.c b/src/userpref.c deleted file mode 100644 index 0e774b7..0000000 --- a/src/userpref.c +++ /dev/null @@ -1,1161 +0,0 @@ -/* - * 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; -} |