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
+