prepare config for pairing

Signed-off-by: Matt Colyer <matt@colyer.name>

2 files changed, 265 insertions, 9 deletions

diff --git a/src/userpref.c b/src/userpref.c
index bc92f96..399e054 100644
--- a/src/userpref.c
+++ b/src/userpref.c
@@ -29,27 +29,239 @@
 
 extern int debug;
 
+inline void create_config_dir() {
+        gchar* config_dir = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR, NULL);
+        g_mkdir_with_parents (config_dir, 755);
+        return;
+}
+
 char* get_host_id()
 {
         char* host_id = NULL;
-        gchar* config_file = NULL;
+        gchar* config_file =  g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+
+        /* now parse file to get the HostID */
+        GKeyFile* key_file = g_key_file_new ();
+        if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
+
+                gchar* loc_host_id = g_key_file_get_value(key_file, "Global", "HostID", NULL);
+                if (loc_host_id)
+                        host_id = strdup((char*)loc_host_id);
+                g_free(loc_host_id);
+        }
+        g_key_file_free(key_file);
+
+        if (debug) printf("Using %s as HostID\n",host_id);
+        return host_id;
+}
+
+int is_device_known(char* public_key)
+{
+        int ret = 0;
 
         /* first get config file */
-        config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        gchar* config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
         if (g_file_test(config_file, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
 
-                /* now parse file to get the HostID */
+                /* now parse file to get knwon devices list */
                 GKeyFile* key_file = g_key_file_new ();
                 if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
 
-                        gchar* loc_host_id = g_key_file_get_value(key_file, "Global", "HostID", NULL);
-                        if (loc_host_id)
-                                host_id = strdup((char*)loc_host_id);
-                        g_free(loc_host_id);
+                        gchar** devices_list = g_key_file_get_string_list (key_file, "Global", "DevicesList", NULL, NULL);
+                        if (devices_list) {
+                                gchar** pcur = devices_list;
+                                while(*pcur && !ret) {
+                                        /* open associated base64 encoded key */
+                                        gchar* keyfilepath = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR, *pcur, NULL);
+                                        if (g_file_test(keyfilepath, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
+                                                GIOChannel* keyfile = g_io_channel_new_file (keyfilepath, "r", NULL);
+                                                
+                                                gchar* stored_key = NULL;
+                                                g_io_channel_read_to_end (keyfile, &stored_key, NULL, NULL);
+
+                                                /* now compare to input */
+                                                if (strcmp(public_key, stored_key) == 2)
+                                                        ret = 1;
+                                                g_free(stored_key);
+                                                g_io_channel_shutdown(keyfile, FALSE, NULL);
+                                                pcur++;
+                                        }
+                                }
+                        }
+                        g_strfreev(devices_list);
                 }
                 g_key_file_free(key_file);
         }
-        if (debug) printf("Using %s as HostID\n",host_id);
-        return host_id;
+        return ret;
+}
+
+int store_device_public_key(char* public_key)
+{
+        if (NULL == public_key || is_device_known(public_key))
+                return 0;
+
+        /* first get config file */
+        gchar* config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        if (g_file_test(config_file, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
+
+
+                GKeyFile* key_file = g_key_file_new ();
+                if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
+
+                        gchar** devices_list = g_key_file_get_string_list (key_file, "Global", "DevicesList", NULL, NULL);
+
+                        guint length = 0;
+                        if (devices_list)
+                                g_strv_length(devices_list);
+                        g_strfreev(devices_list);
+
+                        gchar dev_file[20];
+                        g_sprintf (dev_file, "Device%i", length);
+
+                        gchar* device_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  dev_file, NULL);
+                        GIOChannel* file = g_io_channel_new_file (device_file, "w", NULL);
+                        g_io_channel_write_chars (file, public_key, length, NULL, NULL);
+                        g_io_channel_shutdown(file, FALSE, NULL);
+                                
+                        /* append device to list */
+                        gchar** new_devices_list = (gchar**)g_malloc(sizeof(gchar*)* (length + 1));
+                        int i;
+                        for( i = 0; i < length; i++)
+                                new_devices_list[i] = devices_list[i];
+                        new_devices_list[length] = dev_file;
+                        new_devices_list[length+1] = NULL;
+                        g_key_file_set_string_list (key_file,"Global", "DevicesList", new_devices_list, length+1);
+                        g_free(new_devices_list);
+
+                }
+                gsize length;
+                gchar* buf = g_key_file_to_data (key_file, &length,NULL);
+                GIOChannel* file = g_io_channel_new_file (config_file, "w", NULL);
+                g_io_channel_write_chars (file, buf, length, NULL, NULL);
+                g_io_channel_shutdown(file, FALSE, NULL);
+                g_key_file_free(key_file);
+        }
+
+        return 1;
+}
+
+
+char* get_root_private_key()
+{
+        char* private_key = NULL;
+
+        /* first get config file */
+        gchar* config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        if (g_file_test(config_file, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
+
+                /* now parse file to get knwon devices list */
+                GKeyFile* key_file = g_key_file_new ();
+                if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
+
+                        gchar* loc_private_key = g_key_file_get_value(key_file, "Global", "RootPrivateKey", NULL);
+                        if (loc_private_key)
+                                private_key = strdup((char*)loc_private_key);
+                        g_free(loc_private_key);
+                }
+                g_key_file_free(key_file);
+        }
+        return private_key;
 }
 
+char* get_host_private_key()
+{
+        char* private_key = NULL;
+
+        /* first get config file */
+        gchar* config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        if (g_file_test(config_file, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
+
+                /* now parse file to get knwon devices list */
+                GKeyFile* key_file = g_key_file_new ();
+                if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
+
+                        gchar* loc_private_key = g_key_file_get_value(key_file, "Global", "HostPrivateKey", NULL);
+                        if (loc_private_key)
+                                private_key = strdup((char*)loc_private_key);
+                        g_free(loc_private_key);
+                }
+                g_key_file_free(key_file);
+        }
+        return private_key;
+}
+
+
+char* get_root_certificate()
+{
+        char* cert = NULL;
+
+        /* first get config file */
+        gchar* config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        if (g_file_test(config_file, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
+
+                /* now parse file to get knwon devices list */
+                GKeyFile* key_file = g_key_file_new ();
+                if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
+
+                        gchar* loc_cert = g_key_file_get_value(key_file, "Global", "RootCertificate", NULL);
+                        if (loc_cert)
+                                cert = strdup((char*)loc_cert);
+                        g_free(loc_cert);
+                }
+                g_key_file_free(key_file);
+        }
+        return cert;
+}
+
+char* get_host_certificate()
+{
+        char* cert = NULL;
+
+        /* first get config file */
+        gchar* config_file = g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        if (g_file_test(config_file, (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))) {
+
+                /* now parse file to get knwon devices list */
+                GKeyFile* key_file = g_key_file_new ();
+                if( g_key_file_load_from_file (key_file, config_file, G_KEY_FILE_KEEP_COMMENTS, NULL) ) {
+
+                        gchar* loc_cert = g_key_file_get_value(key_file, "Global", "HostCertificate", NULL);
+                        if (loc_cert)
+                                cert = strdup((char*)loc_cert);
+                        g_free(loc_cert);
+                }
+                g_key_file_free(key_file);
+        }
+        return cert;
+}
+
+int init_config_file(char* host_id, char* root_private_key, char* host_private_key, char* root_cert, char* host_cert)
+{
+        if (!host_id || !root_private_key || !host_private_key)
+                return 0;
+
+        gchar* config_file =  g_build_path(G_DIR_SEPARATOR_S,  g_get_user_config_dir(), LIBIPHONE_CONF_DIR,  LIBIPHONE_CONF_FILE, NULL);
+        /* make sure config directory exists*/
+        create_config_dir();
+
+        /* now parse file to get the HostID */
+        GKeyFile* key_file = g_key_file_new ();
+
+        /* store in config file */
+        g_key_file_set_value (key_file, "Global", "HostID", host_id);
+        g_key_file_set_value (key_file, "Global", "RootPrivateKey", root_private_key);
+        g_key_file_set_value (key_file, "Global", "HostPrivateKey", host_private_key);
+        g_key_file_set_value (key_file, "Global", "RootCertificate", root_cert);
+        g_key_file_set_value (key_file, "Global", "HostCertificate", host_cert);
+
+        /* write config file on disk */
+        gsize length;
+        gchar* buf = g_key_file_to_data (key_file, &length,NULL);
+        GIOChannel* file = g_io_channel_new_file (config_file, "w", NULL);
+        g_io_channel_write_chars (file, buf, length, NULL, NULL);
+        g_io_channel_shutdown(file, FALSE, NULL);
+
+        g_key_file_free(key_file);
+
+        return 1;
+}
diff --git a/src/userpref.h b/src/userpref.h
index b097084..cef0bed 100644
--- a/src/userpref.h
+++ b/src/userpref.h
@@ -29,4 +29,48 @@
 */
 char* get_host_id();
 
+/**
+* \fn int is_device_known(char* public_key)
+*  determine if we already paired this device.
+* \return 1 if device is already paired. Returns 0 otherwise.
+*/
+int is_device_known(char* public_key);
+
+/**
+* \fn int store_device_public_key(char* public_key)
+* \return 1 if everything went well. Returns 0 otherwise.
+*/
+int store_device_public_key(char* public_key);
+
+/**
+* \fn char* get_root_private_key()
+* \return RootPrivateKey if exists. Returns NULL otherwise.
+*/
+char* get_root_private_key();
+
+/**
+* \fn char* get_host_private_key()
+* \return HostPrivateKey if exists. Returns NULL otherwise.
+*/
+char* get_host_private_key();
+
+/**
+* \fn char* get_root_certificate()
+* \return RootCertificate if exists. Returns NULL otherwise.
+*/
+char* get_root_certificate();
+
+/**
+* \fn char* get_host_certificate()
+* \return HostCertificate if exists. Returns NULL otherwise.
+*/
+char* get_host_certificate();
+
+/**
+* \fn int init_config_file(char* host_id, char* root_private_key, char* host_private_key, char* root_cert, char* host_cert)
+* setup a brand new config file.
+* \return 1 if everything went well. Returns 0 otherwise.
+*/
+int init_config_file(char* host_id, char* root_private_key, char* host_private_key, char* root_cert, char* host_cert);
 #endif
+