mirror of https://github.com/denoland/deno.git
699 lines
20 KiB
Rust
699 lines
20 KiB
Rust
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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use crate::deno_error::{permission_denied_msg, type_error};
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use crate::flags::DenoFlags;
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use ansi_term::Style;
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#[cfg(not(test))]
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use atty;
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use deno::ErrBox;
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use log;
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use std::collections::HashSet;
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use std::fmt;
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#[cfg(not(test))]
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use std::io;
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use std::path::PathBuf;
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#[cfg(test)]
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use std::sync::atomic::AtomicBool;
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#[cfg(test)]
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use std::sync::atomic::Ordering;
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use url::Url;
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const PERMISSION_EMOJI: &str = "⚠️";
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/// Tri-state value for storing permission state
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#[derive(PartialEq, Debug, Clone, Copy)]
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pub enum PermissionState {
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Allow = 0,
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Ask = 1,
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Deny = 2,
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}
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impl PermissionState {
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/// Checks the permission state and returns the result.
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pub fn check(self, msg: &str, err_msg: &str) -> Result<(), ErrBox> {
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if self == PermissionState::Allow {
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log_perm_access(msg);
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return Ok(());
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}
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Err(permission_denied_msg(err_msg.to_string()))
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}
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pub fn is_allow(self) -> bool {
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self == PermissionState::Allow
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}
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/// If the state is "Allow" walk it back to the default "Ask"
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/// Don't do anything if state is "Deny"
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pub fn revoke(&mut self) {
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if *self == PermissionState::Allow {
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*self = PermissionState::Ask;
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}
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}
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/// Requests the permission.
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pub fn request(&mut self, msg: &str) -> PermissionState {
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if *self != PermissionState::Ask {
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return *self;
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}
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if permission_prompt(msg) {
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*self = PermissionState::Allow;
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} else {
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*self = PermissionState::Deny;
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}
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*self
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}
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}
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impl From<usize> for PermissionState {
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fn from(val: usize) -> Self {
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match val {
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0 => PermissionState::Allow,
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1 => PermissionState::Ask,
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2 => PermissionState::Deny,
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_ => unreachable!(),
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}
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}
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}
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impl From<bool> for PermissionState {
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fn from(val: bool) -> Self {
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if val {
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PermissionState::Allow
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} else {
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PermissionState::Ask
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}
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}
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}
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impl fmt::Display for PermissionState {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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PermissionState::Allow => f.pad("granted"),
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PermissionState::Ask => f.pad("prompt"),
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PermissionState::Deny => f.pad("denied"),
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}
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}
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}
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impl Default for PermissionState {
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fn default() -> Self {
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PermissionState::Ask
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}
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}
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#[derive(Clone, Debug, Default)]
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pub struct DenoPermissions {
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// Keep in sync with cli/js/permissions.ts
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pub allow_read: PermissionState,
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pub read_whitelist: HashSet<String>,
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pub allow_write: PermissionState,
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pub write_whitelist: HashSet<String>,
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pub allow_net: PermissionState,
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pub net_whitelist: HashSet<String>,
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pub allow_env: PermissionState,
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pub allow_run: PermissionState,
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pub allow_plugin: PermissionState,
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pub allow_hrtime: PermissionState,
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}
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impl DenoPermissions {
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pub fn from_flags(flags: &DenoFlags) -> Self {
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Self {
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allow_read: PermissionState::from(flags.allow_read),
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read_whitelist: flags.read_whitelist.iter().cloned().collect(),
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allow_write: PermissionState::from(flags.allow_write),
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write_whitelist: flags.write_whitelist.iter().cloned().collect(),
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allow_net: PermissionState::from(flags.allow_net),
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net_whitelist: flags.net_whitelist.iter().cloned().collect(),
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allow_env: PermissionState::from(flags.allow_env),
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allow_run: PermissionState::from(flags.allow_run),
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allow_plugin: PermissionState::from(flags.allow_plugin),
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allow_hrtime: PermissionState::from(flags.allow_hrtime),
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}
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}
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pub fn check_run(&self) -> Result<(), ErrBox> {
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self.allow_run.check(
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"access to run a subprocess",
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"run again with the --allow-run flag",
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)
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}
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fn get_state_read(&self, filename: &Option<&str>) -> PermissionState {
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if check_path_white_list(filename, &self.read_whitelist) {
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return PermissionState::Allow;
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}
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self.allow_read
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}
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pub fn check_read(&self, filename: &str) -> Result<(), ErrBox> {
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self.get_state_read(&Some(filename)).check(
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&format!("read access to \"{}\"", filename),
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"run again with the --allow-read flag",
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)
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}
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fn get_state_write(&self, filename: &Option<&str>) -> PermissionState {
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if check_path_white_list(filename, &self.write_whitelist) {
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return PermissionState::Allow;
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}
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self.allow_write
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}
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pub fn check_write(&self, filename: &str) -> Result<(), ErrBox> {
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self.get_state_write(&Some(filename)).check(
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&format!("write access to \"{}\"", filename),
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"run again with the --allow-write flag",
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)
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}
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fn get_state_net(&self, host: &str, port: Option<u16>) -> PermissionState {
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if check_host_and_port_whitelist(host, port, &self.net_whitelist) {
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return PermissionState::Allow;
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}
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self.allow_net
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}
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fn get_state_net_url(
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&self,
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url: &Option<&str>,
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) -> Result<PermissionState, ErrBox> {
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if url.is_none() {
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return Ok(self.allow_net);
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}
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let url: &str = url.unwrap();
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// If url is invalid, then throw a TypeError.
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let parsed = Url::parse(url)
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.map_err(|_| type_error(format!("Invalid url: {}", url)))?;
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Ok(
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self.get_state_net(&format!("{}", parsed.host().unwrap()), parsed.port()),
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)
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}
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pub fn check_net(&self, hostname: &str, port: u16) -> Result<(), ErrBox> {
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self.get_state_net(hostname, Some(port)).check(
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&format!("network access to \"{}:{}\"", hostname, port),
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"run again with the --allow-net flag",
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)
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}
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pub fn check_net_url(&self, url: &url::Url) -> Result<(), ErrBox> {
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self
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.get_state_net(&format!("{}", url.host().unwrap()), url.port())
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.check(
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&format!("network access to \"{}\"", url),
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"run again with the --allow-net flag",
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)
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}
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pub fn check_env(&self) -> Result<(), ErrBox> {
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self.allow_env.check(
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"access to environment variables",
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"run again with the --allow-env flag",
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)
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}
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pub fn check_plugin(&self, filename: &str) -> Result<(), ErrBox> {
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self.allow_plugin.check(
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&format!("access to open a plugin: {}", filename),
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"run again with the --allow-plugin flag",
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)
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}
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pub fn request_run(&mut self) -> PermissionState {
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self
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.allow_run
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.request("Deno requests to access to run a subprocess.")
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}
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pub fn request_read(&mut self, path: &Option<&str>) -> PermissionState {
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if check_path_white_list(path, &self.read_whitelist) {
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return PermissionState::Allow;
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};
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self.allow_read.request(&match path {
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None => "Deno requests read access.".to_string(),
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Some(path) => format!("Deno requests read access to \"{}\".", path),
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})
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}
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pub fn request_write(&mut self, path: &Option<&str>) -> PermissionState {
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if check_path_white_list(path, &self.write_whitelist) {
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return PermissionState::Allow;
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};
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self.allow_write.request(&match path {
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None => "Deno requests write access.".to_string(),
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Some(path) => format!("Deno requests write access to \"{}\".", path),
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})
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}
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pub fn request_net(
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&mut self,
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url: &Option<&str>,
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) -> Result<PermissionState, ErrBox> {
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if self.get_state_net_url(url)? == PermissionState::Ask {
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return Ok(self.allow_net.request(&match url {
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None => "Deno requests network access.".to_string(),
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Some(url) => format!("Deno requests network access to \"{}\".", url),
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}));
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};
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self.get_state_net_url(url)
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}
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pub fn request_env(&mut self) -> PermissionState {
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self
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.allow_env
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.request("Deno requests to access to environment variables.")
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}
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pub fn request_hrtime(&mut self) -> PermissionState {
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self
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.allow_hrtime
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.request("Deno requests to access to high precision time.")
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}
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pub fn request_plugin(&mut self) -> PermissionState {
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self.allow_plugin.request("Deno requests to open plugins.")
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}
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pub fn get_permission_state(
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&self,
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name: &str,
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url: &Option<&str>,
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path: &Option<&str>,
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) -> Result<PermissionState, ErrBox> {
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match name {
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"run" => Ok(self.allow_run),
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"read" => Ok(self.get_state_read(path)),
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"write" => Ok(self.get_state_write(path)),
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"net" => self.get_state_net_url(url),
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"env" => Ok(self.allow_env),
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"plugin" => Ok(self.allow_plugin),
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"hrtime" => Ok(self.allow_hrtime),
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n => Err(type_error(format!("No such permission name: {}", n))),
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}
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}
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}
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/// Shows the permission prompt and returns the answer according to the user input.
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/// This loops until the user gives the proper input.
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#[cfg(not(test))]
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fn permission_prompt(message: &str) -> bool {
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if !atty::is(atty::Stream::Stdin) || !atty::is(atty::Stream::Stderr) {
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return false;
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};
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let msg = format!(
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"️{} {}. Grant? [g/d (g = grant, d = deny)] ",
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PERMISSION_EMOJI, message
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);
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// print to stderr so that if deno is > to a file this is still displayed.
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eprint!("{}", Style::new().bold().paint(msg));
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loop {
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let mut input = String::new();
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let stdin = io::stdin();
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let result = stdin.read_line(&mut input);
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if result.is_err() {
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return false;
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};
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let ch = input.chars().next().unwrap();
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match ch.to_ascii_lowercase() {
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'g' => return true,
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'd' => return false,
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_ => {
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// If we don't get a recognized option try again.
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let msg_again =
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format!("Unrecognized option '{}' [g/d (g = grant, d = deny)] ", ch);
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eprint!("{}", Style::new().bold().paint(msg_again));
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}
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};
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}
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}
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#[cfg(test)]
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static STUB_PROMPT_VALUE: AtomicBool = AtomicBool::new(true);
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#[cfg(test)]
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fn set_prompt_result(value: bool) {
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STUB_PROMPT_VALUE.store(value, Ordering::SeqCst);
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}
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// When testing, permission prompt returns the value of STUB_PROMPT_VALUE
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// which we set from the test functions.
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#[cfg(test)]
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fn permission_prompt(_message: &str) -> bool {
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STUB_PROMPT_VALUE.load(Ordering::SeqCst)
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}
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fn log_perm_access(message: &str) {
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if log_enabled!(log::Level::Info) {
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eprintln!(
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"{}",
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Style::new()
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.bold()
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.paint(format!("{}️ Granted {}", PERMISSION_EMOJI, message))
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);
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}
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}
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fn check_path_white_list(
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filename: &Option<&str>,
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white_list: &HashSet<String>,
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) -> bool {
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if filename.is_none() {
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return false;
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}
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let mut path_buf = PathBuf::from(filename.unwrap());
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loop {
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if white_list.contains(path_buf.to_str().unwrap()) {
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return true;
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}
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if !path_buf.pop() {
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break;
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}
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}
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false
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}
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fn check_host_and_port_whitelist(
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host: &str,
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port: Option<u16>,
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whitelist: &HashSet<String>,
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) -> bool {
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whitelist.contains(host)
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|| (port.is_some()
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&& whitelist.contains(&format!("{}:{}", host, port.unwrap())))
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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// Creates vector of strings, Vec<String>
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macro_rules! svec {
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($($x:expr),*) => (vec![$($x.to_string()),*]);
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}
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#[test]
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fn check_paths() {
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let whitelist = svec!["/a/specific/dir/name", "/a/specific", "/b/c"];
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let perms = DenoPermissions::from_flags(&DenoFlags {
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read_whitelist: whitelist.clone(),
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write_whitelist: whitelist.clone(),
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..Default::default()
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});
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// Inside of /a/specific and /a/specific/dir/name
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assert!(perms.check_read("/a/specific/dir/name").is_ok());
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assert!(perms.check_write("/a/specific/dir/name").is_ok());
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// Inside of /a/specific but outside of /a/specific/dir/name
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assert!(perms.check_read("/a/specific/dir").is_ok());
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assert!(perms.check_write("/a/specific/dir").is_ok());
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// Inside of /a/specific and /a/specific/dir/name
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assert!(perms.check_read("/a/specific/dir/name/inner").is_ok());
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assert!(perms.check_write("/a/specific/dir/name/inner").is_ok());
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// Inside of /a/specific but outside of /a/specific/dir/name
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assert!(perms.check_read("/a/specific/other/dir").is_ok());
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assert!(perms.check_write("/a/specific/other/dir").is_ok());
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// Exact match with /b/c
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assert!(perms.check_read("/b/c").is_ok());
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assert!(perms.check_write("/b/c").is_ok());
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// Sub path within /b/c
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assert!(perms.check_read("/b/c/sub/path").is_ok());
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assert!(perms.check_write("/b/c/sub/path").is_ok());
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// Inside of /b but outside of /b/c
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assert!(perms.check_read("/b/e").is_err());
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assert!(perms.check_write("/b/e").is_err());
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// Inside of /a but outside of /a/specific
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assert!(perms.check_read("/a/b").is_err());
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assert!(perms.check_write("/a/b").is_err());
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}
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#[test]
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fn test_check_net() {
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let perms = DenoPermissions::from_flags(&DenoFlags {
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net_whitelist: svec![
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"localhost",
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"deno.land",
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"github.com:3000",
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"127.0.0.1",
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"172.16.0.2:8000"
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],
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..Default::default()
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});
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let domain_tests = vec![
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("localhost", 1234, true),
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("deno.land", 0, true),
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("deno.land", 3000, true),
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("deno.lands", 0, false),
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("deno.lands", 3000, false),
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("github.com", 3000, true),
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("github.com", 0, false),
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("github.com", 2000, false),
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("github.net", 3000, false),
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("127.0.0.1", 0, true),
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("127.0.0.1", 3000, true),
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("127.0.0.2", 0, false),
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("127.0.0.2", 3000, false),
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("172.16.0.2", 8000, true),
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("172.16.0.2", 0, false),
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("172.16.0.2", 6000, false),
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("172.16.0.1", 8000, false),
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// Just some random hosts that should err
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("somedomain", 0, false),
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("192.168.0.1", 0, false),
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];
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let url_tests = vec![
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// Any protocol + port for localhost should be ok, since we don't specify
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("http://localhost", true),
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("https://localhost", true),
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("https://localhost:4443", true),
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("tcp://localhost:5000", true),
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("udp://localhost:6000", true),
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// Correct domain + any port and protocol should be ok incorrect shouldn't
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("https://deno.land/std/example/welcome.ts", true),
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("https://deno.land:3000/std/example/welcome.ts", true),
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("https://deno.lands/std/example/welcome.ts", false),
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("https://deno.lands:3000/std/example/welcome.ts", false),
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// Correct domain + port should be ok all other combinations should err
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("https://github.com:3000/denoland/deno", true),
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("https://github.com/denoland/deno", false),
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("https://github.com:2000/denoland/deno", false),
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("https://github.net:3000/denoland/deno", false),
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// Correct ipv4 address + any port should be ok others should err
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("tcp://127.0.0.1", true),
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("https://127.0.0.1", true),
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("tcp://127.0.0.1:3000", true),
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("https://127.0.0.1:3000", true),
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("tcp://127.0.0.2", false),
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("https://127.0.0.2", false),
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("tcp://127.0.0.2:3000", false),
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("https://127.0.0.2:3000", false),
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// Correct address + port should be ok all other combinations should err
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("tcp://172.16.0.2:8000", true),
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("https://172.16.0.2:8000", true),
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("tcp://172.16.0.2", false),
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("https://172.16.0.2", false),
|
||
("tcp://172.16.0.2:6000", false),
|
||
("https://172.16.0.2:6000", false),
|
||
("tcp://172.16.0.1:8000", false),
|
||
("https://172.16.0.1:8000", false),
|
||
];
|
||
|
||
for (url_str, is_ok) in url_tests.iter() {
|
||
let u = url::Url::parse(url_str).unwrap();
|
||
assert_eq!(*is_ok, perms.check_net_url(&u).is_ok());
|
||
}
|
||
|
||
for (host, port, is_ok) in domain_tests.iter() {
|
||
assert_eq!(*is_ok, perms.check_net(host, *port).is_ok());
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn test_permissions_request_run() {
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(perms0.request_run(), PermissionState::Allow);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(perms1.request_run(), PermissionState::Deny);
|
||
}
|
||
|
||
#[test]
|
||
fn test_permissions_request_read() {
|
||
let whitelist = svec!["/foo/bar"];
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
read_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
// If the whitelist contains the path, then the result is `allow`
|
||
// regardless of prompt result
|
||
assert_eq!(
|
||
perms0.request_read(&Some("/foo/bar")),
|
||
PermissionState::Allow
|
||
);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
read_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(
|
||
perms1.request_read(&Some("/foo/baz")),
|
||
PermissionState::Allow
|
||
);
|
||
|
||
let mut perms2 = DenoPermissions::from_flags(&DenoFlags {
|
||
read_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(
|
||
perms2.request_read(&Some("/foo/baz")),
|
||
PermissionState::Deny
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn test_permissions_request_write() {
|
||
let whitelist = svec!["/foo/bar"];
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
write_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
// If the whitelist contains the path, then the result is `allow`
|
||
// regardless of prompt result
|
||
assert_eq!(
|
||
perms0.request_write(&Some("/foo/bar")),
|
||
PermissionState::Allow
|
||
);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
write_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(
|
||
perms1.request_write(&Some("/foo/baz")),
|
||
PermissionState::Allow
|
||
);
|
||
|
||
let mut perms2 = DenoPermissions::from_flags(&DenoFlags {
|
||
write_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(
|
||
perms2.request_write(&Some("/foo/baz")),
|
||
PermissionState::Deny
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn test_permission_request_net() {
|
||
let whitelist = svec!["localhost:8080"];
|
||
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
net_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
// If the url matches the whitelist item, then the result is `allow`
|
||
// regardless of prompt result
|
||
assert_eq!(
|
||
perms0
|
||
.request_net(&Some("http://localhost:8080/"))
|
||
.expect("Testing expect"),
|
||
PermissionState::Allow
|
||
);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
net_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(
|
||
perms1
|
||
.request_net(&Some("http://deno.land/"))
|
||
.expect("Testing expect"),
|
||
PermissionState::Allow
|
||
);
|
||
|
||
let mut perms2 = DenoPermissions::from_flags(&DenoFlags {
|
||
net_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(
|
||
perms2
|
||
.request_net(&Some("http://deno.land/"))
|
||
.expect("Testing expect"),
|
||
PermissionState::Deny
|
||
);
|
||
|
||
let mut perms3 = DenoPermissions::from_flags(&DenoFlags {
|
||
net_whitelist: whitelist.clone(),
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert!(perms3.request_net(&Some(":")).is_err());
|
||
}
|
||
|
||
#[test]
|
||
fn test_permissions_request_env() {
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(perms0.request_env(), PermissionState::Allow);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(perms1.request_env(), PermissionState::Deny);
|
||
}
|
||
|
||
#[test]
|
||
fn test_permissions_request_plugin() {
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(perms0.request_plugin(), PermissionState::Allow);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(perms1.request_plugin(), PermissionState::Deny);
|
||
}
|
||
|
||
#[test]
|
||
fn test_permissions_request_hrtime() {
|
||
let mut perms0 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(true);
|
||
assert_eq!(perms0.request_hrtime(), PermissionState::Allow);
|
||
|
||
let mut perms1 = DenoPermissions::from_flags(&DenoFlags {
|
||
..Default::default()
|
||
});
|
||
set_prompt_result(false);
|
||
assert_eq!(perms1.request_hrtime(), PermissionState::Deny);
|
||
}
|
||
}
|