Introduce the 'private-cookies' feature.

.travis.yml

@@ -6,6 +6,7 @@ env:
   - TEST_FLAGS=
   - TEST_FLAGS=--release
   - TEST_FLAGS=--contrib
+  - TEST_FLAGS=--core
 rust:
   - nightly
 script: ./scripts/test.sh $TEST_FLAGS

core/http/Cargo.toml

@@ -15,6 +15,7 @@ categories = ["web-programming"]
 
 [features]
 tls = ["rustls", "hyper-sync-rustls"]
+private-cookies = ["cookie/secure"]
 
 [dependencies]
 smallvec = "0.6"
@@ -24,7 +25,7 @@ time = "0.1"
 indexmap = "1.0"
 rustls = { version = "0.14", optional = true }
 state = "0.4"
-cookie = { version = "0.11", features = ["percent-encode", "secure"] }
+cookie = { version = "0.11", features = ["percent-encode"] }
 pear = "0.1"
 unicode-xid = "0.1"
 

core/http/src/cookies.rs

@@ -2,10 +2,16 @@ use std::fmt;
 use std::cell::RefMut;
 
 use cookie::Delta;
-pub use cookie::{Cookie, Key, CookieJar, SameSite};
+pub use cookie::{Cookie, CookieJar, SameSite};
+
+#[cfg(feature = "private-cookies")]
+pub use cookie::Key;
 
 use Header;
 
+#[cfg(not(feature = "private-cookies"))]
+type Key = ();
+
 /// Collection of one or more HTTP cookies.
 ///
 /// The `Cookies` type allows for retrieval of cookies from an incoming request
@@ -166,28 +172,6 @@ impl<'a> Cookies<'a> {
         }
     }
 
-    /// Returns a reference to the `Cookie` inside this collection with the name
-    /// `name` and authenticates and decrypts the cookie's value, returning a
-    /// `Cookie` with the decrypted value. If the cookie cannot be found, or the
-    /// cookie fails to authenticate or decrypt, `None` is returned.
-    ///
-    /// # Example
-    ///
-    /// ```rust
-    /// # extern crate rocket;
-    /// use rocket::http::Cookies;
-    ///
-    /// fn handler(mut cookies: Cookies) {
-    ///     let cookie = cookies.get_private("name");
-    /// }
-    /// ```
-    pub fn get_private(&mut self, name: &str) -> Option<Cookie<'static>> {
-        match *self {
-            Cookies::Jarred(ref mut jar, key) => jar.private(key).get(name),
-            Cookies::Empty(_) => None
-        }
-    }
-
     /// Adds `cookie` to this collection.
     ///
     /// # Example
@@ -213,6 +197,90 @@ impl<'a> Cookies<'a> {
         }
     }
 
+    /// Removes `cookie` from this collection and generates a "removal" cookies
+    /// to send to the client on response. For correctness, `cookie` must
+    /// contain the same `path` and `domain` as the cookie that was initially
+    /// set. Failure to provide the initial `path` and `domain` will result in
+    /// cookies that are not properly removed.
+    ///
+    /// A "removal" cookie is a cookie that has the same name as the original
+    /// cookie but has an empty value, a max-age of 0, and an expiration date
+    /// far in the past.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// # extern crate rocket;
+    /// use rocket::http::{Cookie, Cookies};
+    ///
+    /// fn handler(mut cookies: Cookies) {
+    ///     cookies.remove(Cookie::named("name"));
+    /// }
+    /// ```
+    pub fn remove(&mut self, cookie: Cookie<'static>) {
+        if let Cookies::Jarred(ref mut jar, _) = *self {
+            jar.remove(cookie)
+        }
+    }
+
+    /// Returns an iterator over all of the cookies present in this collection.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// # extern crate rocket;
+    /// use rocket::http::Cookies;
+    ///
+    /// fn handler(cookies: Cookies) {
+    ///     for c in cookies.iter() {
+    ///         println!("Name: '{}', Value: '{}'", c.name(), c.value());
+    ///     }
+    /// }
+    /// ```
+    pub fn iter(&self) -> impl Iterator<Item=&Cookie<'static>> {
+        match *self {
+            Cookies::Jarred(ref jar, _) => jar.iter(),
+            Cookies::Empty(ref jar) => jar.iter()
+        }
+    }
+
+    /// WARNING: This is unstable! Do not use this method outside of Rocket!
+    #[doc(hidden)]
+    #[inline]
+    pub fn delta(&self) -> Delta {
+        match *self {
+            Cookies::Jarred(ref jar, _) => jar.delta(),
+            Cookies::Empty(ref jar) => jar.delta()
+        }
+    }
+}
+
+#[cfg(feature = "private-cookies")]
+impl<'a> Cookies<'a> {
+    /// Returns a reference to the `Cookie` inside this collection with the name
+    /// `name` and authenticates and decrypts the cookie's value, returning a
+    /// `Cookie` with the decrypted value. If the cookie cannot be found, or the
+    /// cookie fails to authenticate or decrypt, `None` is returned.
+    ///
+    /// This method is only available when the `private-cookies` feature is enabled.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// # extern crate rocket;
+    /// use rocket::http::Cookies;
+    ///
+    /// fn handler(mut cookies: Cookies) {
+    ///     let cookie = cookies.get_private("name");
+    /// }
+    /// ```
+    pub fn get_private(&mut self, name: &str) -> Option<Cookie<'static>> {
+        match *self {
+            Cookies::Jarred(ref mut jar, key) => jar.private(key).get(name),
+            Cookies::Empty(_) => None
+        }
+    }
+
     /// Adds `cookie` to the collection. The cookie's value is encrypted with
     /// authenticated encryption assuring confidentiality, integrity, and
     /// authenticity. The cookie can later be retrieved using
@@ -230,6 +298,8 @@ impl<'a> Cookies<'a> {
     /// These defaults ensure maximum usability and security. For additional
     /// security, you may wish to set the `secure` flag.
     ///
+    /// This method is only available when the `private-cookies` feature is enabled.
+    ///
     /// # Example
     ///
     /// ```rust
@@ -267,6 +337,8 @@ impl<'a> Cookies<'a> {
     ///    * `HttpOnly`: `true`
     ///    * `Expires`: 1 week from now
     ///
+    /// This method is only available when the `private-cookies` feature is enabled.
+    ///
     fn set_private_defaults(cookie: &mut Cookie<'static>) {
         if cookie.path().is_none() {
             cookie.set_path("/");
@@ -285,38 +357,14 @@ impl<'a> Cookies<'a> {
         }
     }
 
-    /// Removes `cookie` from this collection and generates a "removal" cookies
-    /// to send to the client on response. For correctness, `cookie` must
-    /// contain the same `path` and `domain` as the cookie that was initially
-    /// set. Failure to provide the initial `path` and `domain` will result in
-    /// cookies that are not properly removed.
-    ///
-    /// A "removal" cookie is a cookie that has the same name as the original
-    /// cookie but has an empty value, a max-age of 0, and an expiration date
-    /// far in the past.
-    ///
-    /// # Example
-    ///
-    /// ```rust
-    /// # extern crate rocket;
-    /// use rocket::http::{Cookie, Cookies};
-    ///
-    /// fn handler(mut cookies: Cookies) {
-    ///     cookies.remove(Cookie::named("name"));
-    /// }
-    /// ```
-    pub fn remove(&mut self, cookie: Cookie<'static>) {
-        if let Cookies::Jarred(ref mut jar, _) = *self {
-            jar.remove(cookie)
-        }
-    }
-
     /// Removes the private `cookie` from the collection.
     ///
     /// For correct removal, the passed in `cookie` must contain the same `path`
     /// and `domain` as the cookie that was initially set. If a path is not set
     /// on `cookie`, the `"/"` path will automatically be set.
     ///
+    /// This method is only available when the `private-cookies` feature is enabled.
+    ///
     /// # Example
     ///
     /// ```rust
@@ -336,37 +384,6 @@ impl<'a> Cookies<'a> {
             jar.private(key).remove(cookie)
         }
     }
-
-    /// Returns an iterator over all of the cookies present in this collection.
-    ///
-    /// # Example
-    ///
-    /// ```rust
-    /// # extern crate rocket;
-    /// use rocket::http::Cookies;
-    ///
-    /// fn handler(cookies: Cookies) {
-    ///     for c in cookies.iter() {
-    ///         println!("Name: '{}', Value: '{}'", c.name(), c.value());
-    ///     }
-    /// }
-    /// ```
-    pub fn iter(&self) -> impl Iterator<Item=&Cookie<'static>> {
-        match *self {
-            Cookies::Jarred(ref jar, _) => jar.iter(),
-            Cookies::Empty(ref jar) => jar.iter()
-        }
-    }
-
-    /// WARNING: This is unstable! Do not use this method outside of Rocket!
-    #[doc(hidden)]
-    #[inline]
-    pub fn delta(&self) -> Delta {
-        match *self {
-            Cookies::Jarred(ref jar, _) => jar.delta(),
-            Cookies::Empty(ref jar) => jar.delta()
-        }
-    }
 }
 
 impl<'a> fmt::Debug for Cookies<'a> {

core/http/src/lib.rs

@@ -59,7 +59,8 @@ pub mod uncased;
 #[doc(hidden)] pub use smallvec::{SmallVec, Array};
 
 // This one we need to expose for core.
-#[doc(hidden)] pub use cookies::{Key, CookieJar};
+#[doc(hidden)] pub use cookies::CookieJar;
+#[doc(hidden)] #[cfg(feature = "private-cookies")] pub use cookies::Key;
 
 pub use method::Method;
 pub use content_type::ContentType;

core/lib/Cargo.toml

@@ -16,6 +16,7 @@ categories = ["web-programming::http-server"]
 
 [features]
 tls = ["rocket_http/tls"]
+private-cookies = ["rocket_http/private-cookies"]
 
 [dependencies]
 rocket_codegen = { version = "0.4.0-rc.1", path = "../codegen" }

core/lib/src/config/config.rs

@@ -10,7 +10,8 @@ use {num_cpus, base64};
 use config::Environment::*;
 use config::{Result, ConfigBuilder, Environment, ConfigError, LoggingLevel};
 use config::{Table, Value, Array, Datetime};
-use http::Key;
+
+#[cfg(feature = "private-cookies")] use http::Key;
 
 /// Structure for Rocket application configuration.
 ///
@@ -49,6 +50,7 @@ pub struct Config {
     /// How much information to log.
     pub log_level: LoggingLevel,
     /// The secret key.
+    #[cfg(feature = "private-cookies")]
     crate secret_key: SecretKey,
     /// TLS configuration.
     crate tls: Option<TlsConfig>,
@@ -231,6 +233,7 @@ impl Config {
         let default_workers = (num_cpus::get() * 2) as u16;
 
         // Use a generated secret key by default.
+        #[cfg(feature = "private-cookies")]
         let key = SecretKey::Generated(Key::generate());
 
         Ok(match env {
@@ -242,6 +245,7 @@ impl Config {
                     workers: default_workers,
                     keep_alive: Some(5),
                     log_level: LoggingLevel::Normal,
+                    #[cfg(feature = "private-cookies")]
                     secret_key: key,
                     tls: None,
                     limits: Limits::default(),
@@ -257,6 +261,7 @@ impl Config {
                     workers: default_workers,
                     keep_alive: Some(5),
                     log_level: LoggingLevel::Normal,
+                    #[cfg(feature = "private-cookies")]
                     secret_key: key,
                     tls: None,
                     limits: Limits::default(),
@@ -272,6 +277,7 @@ impl Config {
                     workers: default_workers,
                     keep_alive: Some(5),
                     log_level: LoggingLevel::Critical,
+                    #[cfg(feature = "private-cookies")]
                     secret_key: key,
                     tls: None,
                     limits: Limits::default(),
@@ -473,6 +479,7 @@ impl Config {
     /// # Ok(())
     /// # }
     /// ```
+    #[cfg(feature = "private-cookies")]
     pub fn set_secret_key<K: Into<String>>(&mut self, key: K) -> Result<()> {
         let key = key.into();
         let error = self.bad_type("secret_key", "string",
@@ -490,6 +497,10 @@ impl Config {
         self.secret_key = SecretKey::Provided(Key::from_master(&bytes));
         Ok(())
     }
+    #[cfg(not(feature = "private-cookies"))]
+    pub fn set_secret_key<K: Into<String>>(&mut self, key: K) -> Result<()> {
+        Ok(())
+    }
 
     /// Sets the logging level for `self` to `log_level`.
     ///
@@ -663,6 +674,7 @@ impl Config {
     }
 
     /// Retrieves the secret key from `self`.
+    #[cfg(feature = "private-cookies")]
     #[inline]
     crate fn secret_key(&self) -> &Key {
         self.secret_key.inner()

core/lib/src/config/custom_values.rs

@@ -3,14 +3,17 @@ use std::fmt;
 #[cfg(feature = "tls")] use http::tls::{Certificate, PrivateKey};
 
 use config::{Result, Config, Value, ConfigError, LoggingLevel};
-use http::Key;
 
+#[cfg(feature = "private-cookies")] use http::Key;
+
+#[cfg(feature = "private-cookies")]
 #[derive(Clone)]
 pub enum SecretKey {
     Generated(Key),
     Provided(Key)
 }
 
+#[cfg(feature = "private-cookies")]
 impl SecretKey {
     #[inline]
     crate fn inner(&self) -> &Key {
@@ -28,6 +31,7 @@ impl SecretKey {
     }
 }
 
+#[cfg(feature = "private-cookies")]
 impl fmt::Display for SecretKey {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {

core/lib/src/local/request.rs

@@ -269,6 +269,8 @@ impl<'c> LocalRequest<'c> {
     ///
     /// [private cookie]: ::http::Cookies::add_private()
     ///
+    /// This method is only available when the `private-cookies` feature is enabled.
+    ///
     /// # Examples
     ///
     /// Add `user_id` as a private cookie:
@@ -281,6 +283,7 @@ impl<'c> LocalRequest<'c> {
     /// # #[allow(unused_variables)]
     /// let req = client.get("/").private_cookie(Cookie::new("user_id", "sb"));
     /// ```
+    #[cfg(feature = "private-cookies")]
     #[inline]
     pub fn private_cookie(self, cookie: Cookie<'static>) -> Self {
         self.request.cookies().add_original_private(cookie);

core/lib/src/request/request.rs

@@ -290,7 +290,10 @@ impl<'r> Request<'r> {
     pub fn cookies(&self) -> Cookies {
         // FIXME: Can we do better? This is disappointing.
         match self.state.cookies.try_borrow_mut() {
+            #[cfg(feature = "private-cookies")]
             Ok(jar) => Cookies::new(jar, self.state.config.secret_key()),
+            #[cfg(not(feature = "private-cookies"))]
+            Ok(jar) => Cookies::new(jar, &()),
             Err(_) => {
                 error_!("Multiple `Cookies` instances are active at once.");
                 info_!("An instance of `Cookies` must be dropped before another \

core/lib/src/rocket.rs

@@ -396,6 +396,7 @@ impl Rocket {
         launch_info_!("port: {}", Paint::white(&config.port));
         launch_info_!("log: {}", Paint::white(config.log_level));
         launch_info_!("workers: {}", Paint::white(config.workers));
+        #[cfg(feature = "private-cookies")]
         launch_info_!("secret key: {}", Paint::white(&config.secret_key));
         launch_info_!("limits: {}", Paint::white(&config.limits));
 
@@ -414,8 +415,10 @@ impl Rocket {
             launch_info_!("tls: {}", Paint::white("disabled"));
         }
 
-        if config.secret_key.is_generated() && config.environment.is_prod() {
-            warn!("environment is 'production', but no `secret_key` is configured");
+        #[cfg(feature = "private-cookies")] {
+            if config.secret_key.is_generated() && config.environment.is_prod() {
+                warn!("environment is 'production', but no `secret_key` is configured");
+            }
         }
 
         for (name, value) in config.extras() {

core/lib/tests/local_request_private_cookie-issue-368.rs

@@ -4,6 +4,7 @@
 
 use rocket::http::Cookies;
 
+#[cfg(feature = "private-cookies")]
 #[get("/")]
 fn return_private_cookie(mut cookies: Cookies) -> Option<String> {
     match cookies.get_private("cookie_name") {
@@ -12,6 +13,7 @@ fn return_private_cookie(mut cookies: Cookies) -> Option<String> {
     }
 }
 
+#[cfg(feature = "private-cookies")]
 mod tests {
     use super::*;
     use rocket::local::Client;

examples/session/Cargo.toml

@@ -5,7 +5,7 @@ workspace = "../../"
 publish = false
 
 [dependencies]
-rocket = { path = "../../core/lib" }
+rocket = { path = "../../core/lib", features = ["private-cookies"] }
 
 [dependencies.rocket_contrib]
 path = "../../contrib/lib"

scripts/test.sh

@@ -107,6 +107,26 @@ if [ "$1" = "--contrib" ]; then
     CARGO_INCREMENTAL=0 cargo test --no-default-features --features "${feature}"
   done
 
+  popd > /dev/null 2>&1
+elif [ "$1" = "--core" ]; then
+  FEATURES=(
+    private-cookies
+    tls
+  )
+
+  pushd "${CORE_ROOT}" > /dev/null 2>&1
+
+  echo ":: Building and testing core [no features]..."
+  CARGO_INCREMENTAL=0 cargo test --no-default-features
+
+  echo ":: Building and testing core [default]..."
+  CARGO_INCREMENTAL=0 cargo test
+
+  for feature in "${FEATURES[@]}"; do
+    echo ":: Building and testing core [${feature}]..."
+    CARGO_INCREMENTAL=0 cargo test --no-default-features --features "${feature}"
+  done
+
   popd > /dev/null 2>&1
 else
   echo ":: Bootstrapping examples..."

site/guide/4-requests.md

@@ -503,6 +503,15 @@ fn logout(mut cookies: Cookies) -> Flash<Redirect> {
 
 [`Cookies::add()`]: @api/rocket/http/enum.Cookies.html#method.add
 
+Private Cookies can be omitted at build time by excluding the feature
+`private-cookies`. You can do this by setting the `default-features`
+directive to `false` in your `Cargo.toml`:
+
+```toml
+[dependencies.rocket]
+default-features = false
+```
+
 ### Secret Key
 
 To encrypt private cookies, Rocket uses the 256-bit key specified in the