server/protocol: Add 'change_password' command

1 files changed, 18 insertions, 2 deletions

diff --git a/command.c b/command.c
index ca70d76..39a50b7 100644
--- a/command.c
+++ b/command.c
@@ -98,6 +98,21 @@ static struct cmd_retval cmd_logout(struct conn_data *data,const char *tag,const
 	return RET_OK;
 }
 
+static struct cmd_retval cmd_change_password(struct conn_data *data, const char *tag, const char **args) {
+	// TODO: use sodium_mlock correctly for the password
+
+	// Note: this function has exactly ONE return point, so that it is easier
+	// to see that we indeed return MEMZERO.
+
+	if (data->userid == -1) {
+		net_send_error(data->fd, tag, "Not logged in");
+	} else {
+		db_set_pass(data->userid, args[0]);
+		net_send_ok(data->fd, tag);
+	}
+	return RET_MEMZERO;
+}
+
 static struct cmd_retval cmd_list_rooms(struct conn_data *data,const char *tag,const char **args){
 	(void)args;
 	if(data->userid==-1){
@@ -465,8 +480,8 @@ struct cmd_info{
 
 // Use CommandHash.hs to re-generate this perfect hash function for a different
 // list of commands.
-#define COMMAND_HASH_MODULUS 34
-#define COMMAND_HASH(cmd0, len) ((4 * cmd0 + 7 * len) % COMMAND_HASH_MODULUS)
+#define COMMAND_HASH_MODULUS 35
+#define COMMAND_HASH(cmd0, len) ((1 * cmd0 + 6 * len) % COMMAND_HASH_MODULUS)
 
 #define COMMAND_ENTRY(cmd0, cmd, nargs, longlast, handler) \
 	[COMMAND_HASH(cmd0, strlen(cmd))] = {cmd, nargs, longlast, handler}
@@ -478,6 +493,7 @@ static const struct cmd_info commands[COMMAND_HASH_MODULUS] = {
 	COMMAND_ENTRY('r', "register", 2, true, cmd_register),
 	COMMAND_ENTRY('l', "login", 2, true, cmd_login),
 	COMMAND_ENTRY('l', "logout", 0, false, cmd_logout),
+	COMMAND_ENTRY('c', "change_password", 1, true, cmd_change_password),
 	COMMAND_ENTRY('l', "list_rooms", 0, false, cmd_list_rooms),
 	COMMAND_ENTRY('l', "list_members", 1, false, cmd_list_members),
 	COMMAND_ENTRY('c', "create_room", 0, false, cmd_create_room),