Port keyutils tests add

Cargo.toml

@@ -13,6 +13,10 @@ edition = "2018"
 [workspace]
 members = ["keyutils-raw"]
 
+[dev-dependencies]
+lazy_static = "1"
+regex = "1"
+
 [dependencies]
 bitflags = "1.0.4"
 errno = "0.2"

src/lib.rs

@@ -30,6 +30,10 @@
 
 #![warn(missing_docs)]
 
+#[cfg(test)]
+#[macro_use]
+extern crate lazy_static;
+
 mod api;
 mod constants;
 mod keytype;
@@ -41,3 +45,6 @@ pub use self::constants::*;
 pub use self::keytype::*;
 
 pub use keyutils_raw::{DefaultKeyring, KeyPermissions, KeyringSerial, TimeoutSeconds};
+
+#[cfg(test)]
+mod tests;

src/tests/add.rs

@@ -0,0 +1,131 @@
+// Copyright (c) 2019, Ben Boeckel
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright notice,
+//       this list of conditions and the following disclaimer in the documentation
+//       and/or other materials provided with the distribution.
+//     * Neither the name of this project nor the names of its contributors
+//       may be used to endorse or promote products derived from this software
+//       without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+use std::iter;
+
+use crate::keytypes::User;
+use crate::{Keyring, KeyringSerial, SpecialKeyring};
+
+use super::utils::kernel::*;
+use super::utils::keys::*;
+
+#[test]
+fn empty_key_type() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    let err = keyring.add_key::<EmptyKey, _, _>("", ()).unwrap_err();
+    assert_eq!(err, errno::Errno(libc::EINVAL));
+}
+
+#[test]
+fn unsupported_key_type() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    let err = keyring.add_key::<UnsupportedKey, _, _>("", ()).unwrap_err();
+    assert_eq!(err, errno::Errno(libc::ENODEV));
+}
+
+#[test]
+fn invalid_key_type() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    let err = keyring.add_key::<InvalidKey, _, _>("", ()).unwrap_err();
+    assert_eq!(err, errno::Errno(libc::EPERM));
+}
+
+#[test]
+fn maxlen_key_type() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    let err = keyring.add_key::<MaxLenKey, _, _>("", ()).unwrap_err();
+    assert_eq!(err, errno::Errno(libc::ENODEV));
+}
+
+#[test]
+fn overlong_key_type() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    let err = keyring.add_key::<OverlongKey, _, _>("", ()).unwrap_err();
+    assert_eq!(err, errno::Errno(libc::EINVAL));
+}
+
+#[test]
+fn keyring_with_payload() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    let err = keyring
+        .add_key::<KeyringShadow, _, _>("", "payload")
+        .unwrap_err();
+    assert_eq!(err, errno::Errno(libc::EINVAL));
+}
+
+#[test]
+fn max_user_description() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    // Subtract one because the NUL is added in the kernel API.
+    let maxdesc: String = iter::repeat('a').take(*PAGE_SIZE - 1).collect();
+    let res = keyring.add_key::<User, _, _>(maxdesc.as_ref(), "payload".as_bytes());
+    // If the user's quota is smaller than this, it's an error.
+    if KEY_INFO.maxbytes < *PAGE_SIZE {
+        assert_eq!(res.unwrap_err(), errno::Errno(libc::EDQUOT));
+    } else {
+        let key = res.unwrap();
+        assert_eq!(key.description().unwrap().description, maxdesc);
+        key.invalidate().unwrap();
+    }
+}
+
+#[test]
+fn overlong_user_description() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Process).unwrap();
+    // On MIPS with < 3.19, there is a bug where this is allowed. 3.19 was released in Feb 2015,
+    // so this is being ignored here.
+    let toolarge: String = iter::repeat('a').take(*PAGE_SIZE).collect();
+    let err = keyring
+        .add_key::<User, _, _>(toolarge.as_ref(), "payload".as_bytes())
+        .unwrap_err();
+    assert_eq!(err, errno::Errno(libc::EINVAL));
+}
+
+#[test]
+fn invalid_keyring() {
+    // Yes, we're explicitly breaking the NonZeroI32 rules here. However, it is not passing
+    // through any bits which care (e.g., `Option`), so this is purely to test that using an
+    // invalid keyring ID gives back `EINVAL` as expected.
+    let mut keyring = unsafe { Keyring::new(KeyringSerial::new_unchecked(0)) };
+    let err = keyring
+        .add_key::<User, _, _>("desc", "payload".as_bytes())
+        .unwrap_err();
+    assert_eq!(err, errno::Errno(libc::EINVAL));
+}
+
+#[test]
+fn add_key_to_session() {
+    let mut keyring = Keyring::attach_or_create(SpecialKeyring::Session).unwrap();
+    let expected = "stuff".as_bytes();
+    let mut key = keyring.add_key::<User, _, _>("wibble", expected).unwrap();
+    let payload = key.read().unwrap();
+    assert_eq!(payload, expected);
+    let new_expected = "lizard".as_bytes();
+    key.update(new_expected).unwrap();
+    let new_payload = key.read().unwrap();
+    assert_eq!(new_payload, new_expected);
+    keyring.unlink_key(&key).unwrap();
+}

src/tests/mod.rs

@@ -0,0 +1,31 @@
+// Copyright (c) 2019, Ben Boeckel
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright notice,
+//       this list of conditions and the following disclaimer in the documentation
+//       and/or other materials provided with the distribution.
+//     * Neither the name of this project nor the names of its contributors
+//       may be used to endorse or promote products derived from this software
+//       without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+//! The test structure here comes from the structure in libkeyutils.
+
+mod utils;
+
+mod add;

src/tests/utils/kernel.rs

@@ -0,0 +1,122 @@
+// Copyright (c) 2019, Ben Boeckel
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright notice,
+//       this list of conditions and the following disclaimer in the documentation
+//       and/or other materials provided with the distribution.
+//     * Neither the name of this project nor the names of its contributors
+//       may be used to endorse or promote products derived from this software
+//       without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+use std::collections::HashMap;
+use std::fs;
+use std::str::FromStr;
+
+use regex::{Captures, Regex};
+
+lazy_static! {
+    pub static ref PAGE_SIZE: usize = page_size();
+    pub static ref KEY_INFO: KeyQuota = key_user_info();
+}
+
+fn page_size() -> usize {
+    errno::set_errno(errno::Errno(0));
+    let ret = unsafe { libc::sysconf(libc::_SC_PAGESIZE) };
+    if ret < 0 {
+        let err = errno::errno();
+        if err.0 == 0 {
+            panic!("page size is indeterminite?");
+        } else {
+            panic!("failed to query the page size: {}", errno::errno());
+        }
+    }
+    ret as usize
+}
+
+const KEY_USERS_FILE: &str = "/proc/key-users";
+
+lazy_static! {
+    static ref KEY_USERS: Regex = Regex::new(
+        " *(?P<uid>\\d+): +\
+         (?P<usage>\\d+) \
+         (?P<nkeys>\\d+)/(?P<nikeys>\\d+) \
+         (?P<qnkeys>\\d+)/(?P<maxkeys>\\d+) \
+         (?P<qnbytes>\\d+)/(?P<maxbytes>\\d+)"
+    )
+    .unwrap();
+}
+
+fn by_name<T: FromStr>(capture: &Captures, name: &str) -> T {
+    let cap = capture
+        .name(name)
+        .expect("name should be captured")
+        .as_str();
+    match cap.parse() {
+        Ok(v) => v,
+        Err(_) => panic!("failed to parse {} as an integer", name),
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct KeyQuota {
+    pub usage: usize,
+    pub nkeys: usize,
+    pub nikeys: usize,
+    pub qnkeys: usize,
+    pub maxkeys: usize,
+    pub qnbytes: usize,
+    pub maxbytes: usize,
+}
+
+fn all_key_user_info() -> HashMap<libc::uid_t, KeyQuota> {
+    let data = String::from_utf8(fs::read(KEY_USERS_FILE).unwrap()).unwrap();
+    (*KEY_USERS)
+        .captures_iter(&data)
+        .map(|capture| {
+            let uid = by_name(&capture, "uid");
+            let usage = by_name(&capture, "usage");
+            let nkeys = by_name(&capture, "nkeys");
+            let nikeys = by_name(&capture, "nikeys");
+            let qnkeys = by_name(&capture, "qnkeys");
+            let maxkeys = by_name(&capture, "maxkeys");
+            let qnbytes = by_name(&capture, "qnbytes");
+            let maxbytes = by_name(&capture, "maxbytes");
+
+            (
+                uid,
+                KeyQuota {
+                    usage,
+                    nkeys,
+                    nikeys,
+                    qnkeys,
+                    maxkeys,
+                    qnbytes,
+                    maxbytes,
+                },
+            )
+        })
+        .collect()
+}
+
+fn key_user_info() -> KeyQuota {
+    let uid = unsafe { libc::getuid() };
+    *all_key_user_info()
+        .get(&uid)
+        .expect("the current user has no keys?")
+}