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version = "0.5.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
|
||||
|
||||
[[package]]
|
||||
name = "strsim"
|
||||
version = "0.8.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "1.0.81"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f2afee18b8beb5a596ecb4a2dce128c719b4ba399d34126b9e4396e3f9860966"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-xid",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "termcolor"
|
||||
version = "1.1.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
|
||||
dependencies = [
|
||||
"winapi-util",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "textwrap"
|
||||
version = "0.11.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
|
||||
dependencies = [
|
||||
"unicode-width",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror"
|
||||
version = "1.0.30"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
|
||||
dependencies = [
|
||||
"thiserror-impl",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror-impl"
|
||||
version = "1.0.30"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tinyvec"
|
||||
version = "1.5.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2c1c1d5a42b6245520c249549ec267180beaffcc0615401ac8e31853d4b6d8d2"
|
||||
dependencies = [
|
||||
"tinyvec_macros",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tinyvec_macros"
|
||||
version = "0.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-bidi"
|
||||
version = "0.3.7"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1a01404663e3db436ed2746d9fefef640d868edae3cceb81c3b8d5732fda678f"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-normalization"
|
||||
version = "0.1.19"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d54590932941a9e9266f0832deed84ebe1bf2e4c9e4a3554d393d18f5e854bf9"
|
||||
dependencies = [
|
||||
"tinyvec",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-width"
|
||||
version = "0.1.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-xid"
|
||||
version = "0.2.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
|
||||
|
||||
[[package]]
|
||||
name = "untrusted"
|
||||
version = "0.7.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
|
||||
|
||||
[[package]]
|
||||
name = "url"
|
||||
version = "2.2.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a507c383b2d33b5fc35d1861e77e6b383d158b2da5e14fe51b83dfedf6fd578c"
|
||||
dependencies = [
|
||||
"form_urlencoded",
|
||||
"idna",
|
||||
"matches",
|
||||
"percent-encoding",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "vec_map"
|
||||
version = "0.8.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
|
||||
|
||||
[[package]]
|
||||
name = "version_check"
|
||||
version = "0.9.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen"
|
||||
version = "0.2.78"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "632f73e236b219150ea279196e54e610f5dbafa5d61786303d4da54f84e47fce"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"wasm-bindgen-macro",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-backend"
|
||||
version = "0.2.78"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a317bf8f9fba2476b4b2c85ef4c4af8ff39c3c7f0cdfeed4f82c34a880aa837b"
|
||||
dependencies = [
|
||||
"bumpalo",
|
||||
"lazy_static",
|
||||
"log",
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro"
|
||||
version = "0.2.78"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d56146e7c495528bf6587663bea13a8eb588d39b36b679d83972e1a2dbbdacf9"
|
||||
dependencies = [
|
||||
"quote",
|
||||
"wasm-bindgen-macro-support",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro-support"
|
||||
version = "0.2.78"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7803e0eea25835f8abdc585cd3021b3deb11543c6fe226dcd30b228857c5c5ab"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
"wasm-bindgen-backend",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-shared"
|
||||
version = "0.2.78"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0237232789cf037d5480773fe568aac745bfe2afbc11a863e97901780a6b47cc"
|
||||
|
||||
[[package]]
|
||||
name = "web-sys"
|
||||
version = "0.3.55"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "38eb105f1c59d9eaa6b5cdc92b859d85b926e82cb2e0945cd0c9259faa6fe9fb"
|
||||
dependencies = [
|
||||
"js-sys",
|
||||
"wasm-bindgen",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "webpki"
|
||||
version = "0.22.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f095d78192e208183081cc07bc5515ef55216397af48b873e5edcd72637fa1bd"
|
||||
dependencies = [
|
||||
"ring",
|
||||
"untrusted",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-util"
|
||||
version = "0.1.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
|
||||
dependencies = [
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "x509-parser"
|
||||
version = "0.12.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ffc90836a84cb72e6934137b1504d0cae304ef5d83904beb0c8d773bbfe256ed"
|
||||
dependencies = [
|
||||
"base64",
|
||||
"chrono",
|
||||
"data-encoding",
|
||||
"der-parser",
|
||||
"lazy_static",
|
||||
"nom",
|
||||
"oid-registry",
|
||||
"rusticata-macros",
|
||||
"thiserror",
|
||||
]
|
||||
20
Cargo.toml
Normal file
20
Cargo.toml
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
[package]
|
||||
name = "opal"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
[profile.release]
|
||||
lto = true
|
||||
|
||||
[dependencies]
|
||||
clap = "2.33"
|
||||
env_logger = "0.9"
|
||||
log = "0.4"
|
||||
mio = { version = "0.7", features = ["os-poll", "net"] }
|
||||
percent-encoding = "2.1"
|
||||
ring = "0.16"
|
||||
rustls = { version = "0.20", features = ["dangerous_configuration"] }
|
||||
rustls-pemfile = "0.2"
|
||||
url = "2.2"
|
||||
webpki = "0.22"
|
||||
x509-parser = "0.12"
|
||||
66
README.md
Normal file
66
README.md
Normal file
|
|
@ -0,0 +1,66 @@
|
|||
Opal
|
||||
====
|
||||
|
||||
Opal is a Gemini server written in Rust. It is meant to serve dynamic content
|
||||
through CGI and does not serve static files. In a way, it is a companion project
|
||||
to the [Agate][agate] Gemini server which only serves static files, trying to
|
||||
focus on a smaller set of features but do them correctly.
|
||||
|
||||
[agate]: https://github.com/mbrubeck/agate/
|
||||
|
||||
|
||||
|
||||
CGI environment variables
|
||||
-------------------------
|
||||
|
||||
Opal tries to implement RFC 3875 (CGI 1.1) and provides all the required
|
||||
environment variables to processes. It also add a bunch of Gemini specific
|
||||
variables, like a lot of other servers (Gemserv, Gmid, Gmnisrv, …).
|
||||
|
||||
| Presence | Variable | Description |
|
||||
|-------------|------------------------|------------------------------------------------------|
|
||||
| always | GATEWAY_INTERFACE | "CGI/1.1" |
|
||||
| always | REMOTE_ADDR | Peer IP address and port |
|
||||
| always | REMOTE_HOST | Same as REMOTE_ADDR |
|
||||
| always | REQUEST_METHOD | Empty string for compatibility |
|
||||
| always | SCRIPT_NAME | Script name part of the URL path |
|
||||
| always | SERVER_NAME | Hostname used for SNI |
|
||||
| always | SERVER_PORT | Port where the request has been received |
|
||||
| always | SERVER_PROTOCOL | "GEMINI" |
|
||||
| always | SERVER_SOFTWARE | "opal/version", e.g. "opal/0.1.0" |
|
||||
| always | GEMINI_DOCUMENT_ROOT | CGI root |
|
||||
| always | GEMINI_SCRIPT_FILENAME | CGI script that matched the URL path |
|
||||
| always | GEMINI_URL | Full URL, normalized |
|
||||
| always | GEMINI_URL_PATH | URL path, normalized |
|
||||
| always | TLS_VERSION | TLS version, e.g. "TLSv1_3" |
|
||||
| always | TLS_CIPHER | TLS cipher suite, e.g. "TLS13_AES_256_GCM_SHA384" |
|
||||
| optional | PATH_INFO | Path passed to the CGI process after the script name |
|
||||
| optional | QUERY_STRING | Query string if provided, still URL-encoded |
|
||||
| client cert | AUTH_TYPE | "Certificate" if one is provided |
|
||||
| client cert | REMOTE_USER | Subject common name (empty if unavailable) |
|
||||
| client cert | TLS_CLIENT_ISSUER | Issuer common name (empty if unavailable) |
|
||||
| client cert | TLS_CLIENT_HASH | Digest of the DER reprensetation of the cert |
|
||||
| client cert | TLS_CLIENT_NOT_AFTER | Timestamp in seconds |
|
||||
| client cert | TLS_CLIENT_NOT_BEFORE | Timestamp in seconds |
|
||||
|
||||
Opal does not provide `CONTENT_LENGTH`, `CONTENT_TYPE`, `REMOTE_IDENT` because
|
||||
they do not make much sense in Gemini.
|
||||
|
||||
The `TLS_CLIENT_HASH` is a string that starts with "SHA256:" followed by the
|
||||
SHA256 digest of the DER representation of the client certificate, as a
|
||||
lowercase hex-string.
|
||||
|
||||
It can be a bit confusing which variable represent what data, especially those
|
||||
related to the URL and the path. Take the following request as example:
|
||||
`gemini://localhost/env/sub1/sub2?search=élément`. Suppose our CGI root, in
|
||||
`/cgi`, contains the executable script named `env`. The variables will be:
|
||||
|
||||
```
|
||||
GEMINI_DOCUMENT_ROOT=/cgi
|
||||
GEMINI_SCRIPT_FILENAME=/cgi/env
|
||||
GEMINI_URL=gemini://localhost/env/sub1/sub2?search=%C3%A9l%C3%A9ment
|
||||
GEMINI_URL_PATH=/env/sub1/sub2
|
||||
SCRIPT_NAME=/env
|
||||
PATH_INFO=/sub1/sub2
|
||||
QUERY_STRING=search=%C3%A9l%C3%A9ment
|
||||
```
|
||||
3
examples/cgi/env
Executable file
3
examples/cgi/env
Executable file
|
|
@ -0,0 +1,3 @@
|
|||
#!/bin/sh
|
||||
printf "20 text/plain\r\n"
|
||||
env
|
||||
321
src/cgi.rs
Normal file
321
src/cgi.rs
Normal file
|
|
@ -0,0 +1,321 @@
|
|||
//! CGI implementation.
|
||||
|
||||
use std::collections::HashMap;
|
||||
use std::fmt::Write;
|
||||
use std::fs;
|
||||
use std::path;
|
||||
use std::process;
|
||||
|
||||
use log::{debug, error};
|
||||
|
||||
/// General CGI configuration.
|
||||
pub struct CgiConfig {
|
||||
pub root: String,
|
||||
}
|
||||
|
||||
/// Return true if this path has executable bits set on Unix systems.
|
||||
///
|
||||
/// If for some reason we can't get the mode information (not on Unix or some error occured),
|
||||
/// return false.
|
||||
fn is_executable(path: &path::Path) -> bool {
|
||||
match fs::metadata(path) {
|
||||
Ok(metadata) => {
|
||||
use std::os::unix::fs::PermissionsExt;
|
||||
let mode = metadata.permissions().mode();
|
||||
mode & 0o111 != 0
|
||||
}
|
||||
Err(err) => {
|
||||
error!(
|
||||
"Can't get metadata for \"{}\": {}",
|
||||
path.to_string_lossy(),
|
||||
err
|
||||
);
|
||||
false
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl crate::server::Connection<'_> {
|
||||
/// Process a client request.
|
||||
///
|
||||
/// If the CGI process returns successfully, return the requested URL with the process output
|
||||
/// so that it can be sent back to the client.
|
||||
///
|
||||
/// If an error occurs outside of the CGI process, return a 3-uple with the URL (if it could be
|
||||
/// parsed correctly), a Gemini error code and an explanation string to provide to the client.
|
||||
pub fn get_response(
|
||||
&self,
|
||||
request: &[u8],
|
||||
) -> Result<(String, Vec<u8>), (Option<String>, u8, &str)> {
|
||||
// Convert the URL to UTF-8.
|
||||
let url_str = std::str::from_utf8(&request[..request.len() - 2])
|
||||
.map_err(|_| (None, 59, "URL is not valid UTF-8"))?;
|
||||
// Parse the URL. The `url` crate normalizes ".." and "/" elements here.
|
||||
let url = url::Url::parse(url_str)
|
||||
.map_err(|_| (Some(url_str.to_string()), 59u8, "Invalid URL"))?;
|
||||
|
||||
// Get the script path, optionally with CGI's "path info".
|
||||
let (script_path, path_info) = self.validate_script_path(&url)?;
|
||||
debug!("Script path: \"{}\"", script_path.to_string_lossy());
|
||||
|
||||
// Define a generic "temp failure" error for any other issue.
|
||||
let cgi_error = (Some(url_str.to_string()), 40, "Temporary failure");
|
||||
|
||||
// Execute script and return its output.
|
||||
let env = self
|
||||
.get_cgi_envs(&url, &script_path.to_string_lossy(), &path_info)
|
||||
.ok_or_else(|| {
|
||||
error!("Can't get required environment variables.");
|
||||
cgi_error.to_owned()
|
||||
})?;
|
||||
let output = process::Command::new(&script_path)
|
||||
.env_clear()
|
||||
.envs(env)
|
||||
.output()
|
||||
.map_err(|err| {
|
||||
error!("Can't execute script: {}", err);
|
||||
cgi_error.to_owned()
|
||||
})?;
|
||||
|
||||
Ok((url_str.to_string(), output.stdout))
|
||||
}
|
||||
|
||||
/// Return a validated script path from the requested URL along with CGI PATH_INFO.
|
||||
///
|
||||
/// A valid path points to an existing, executable file, located within the CGI scripts root.
|
||||
/// If any of these condition fails, log the reason and return an appropriate 3-uple for
|
||||
/// `get_response`.
|
||||
fn validate_script_path(
|
||||
&self,
|
||||
url: &url::Url,
|
||||
) -> Result<(path::PathBuf, Option<String>), (Option<String>, u8, &str)> {
|
||||
// Define a generic "not found" error for most path issues.
|
||||
let not_found = (Some(url.as_str().to_string()), 51, "Not found");
|
||||
|
||||
// Find script path from our CGI root and the request.
|
||||
let mut path = path::PathBuf::from(&self.cgi_config.root);
|
||||
let mut segments = url.path_segments().ok_or_else(|| {
|
||||
error!("Can't get path segments from URL");
|
||||
not_found.to_owned()
|
||||
})?;
|
||||
// We incrementally push path segments after our CGI root to find the first path that
|
||||
// represents an executable file.
|
||||
let mut found_script = false;
|
||||
loop {
|
||||
let segment = segments.next();
|
||||
if segment.is_none() {
|
||||
break;
|
||||
}
|
||||
let decoded_segment = percent_encoding::percent_decode_str(segment.unwrap())
|
||||
.decode_utf8()
|
||||
.map_err(|err| {
|
||||
error!("Path segment decoded into invalid UTF-8: {}", err);
|
||||
not_found.to_owned()
|
||||
})?;
|
||||
path.push(decoded_segment.into_owned());
|
||||
// If that path is not an executable file, continue with the next segment.
|
||||
if path.is_file() && is_executable(&path) {
|
||||
found_script = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if !found_script {
|
||||
error!("No script found along path \"{}\".", path.to_string_lossy());
|
||||
return Err(not_found);
|
||||
}
|
||||
|
||||
// Collect the remaining segments into the CGI "path info" value.
|
||||
let rem_segments = segments.collect::<Vec<&str>>();
|
||||
let path_info = if rem_segments.len() > 0 {
|
||||
Some(String::from("/") + &rem_segments.join("/"))
|
||||
} else {
|
||||
None
|
||||
};
|
||||
|
||||
// Just for safety, check that the now-canonicalized path is within the CGI root.
|
||||
if !path.starts_with(&self.cgi_config.root) {
|
||||
debug!(
|
||||
"Script path \"{}\" is outside of CGI root dir \"{}\".",
|
||||
path.to_string_lossy(),
|
||||
self.cgi_config.root
|
||||
);
|
||||
return Err(not_found);
|
||||
}
|
||||
|
||||
Ok((path, path_info))
|
||||
}
|
||||
|
||||
/// Build environment variables for the CGI process.
|
||||
pub fn get_cgi_envs(
|
||||
&self,
|
||||
url: &url::Url,
|
||||
script_path: &str,
|
||||
path_info: &Option<String>,
|
||||
) -> Option<HashMap<String, String>> {
|
||||
// Start the envs vector with common, nothing-to-compute elements.
|
||||
let mut envs = vec![
|
||||
("GATEWAY_INTERFACE", String::from("CGI/1.1")),
|
||||
("REQUEST_METHOD", String::new()),
|
||||
("SERVER_PROTOCOL", String::from("GEMINI")),
|
||||
("SERVER_SOFTWARE", format!("opal/{}", crate_version!())),
|
||||
("GEMINI_DOCUMENT_ROOT", self.cgi_config.root.to_string()),
|
||||
("GEMINI_SCRIPT_FILENAME", script_path.to_string()),
|
||||
("GEMINI_URL", url.to_string()),
|
||||
("GEMINI_URL_PATH", url.path().to_string()),
|
||||
];
|
||||
|
||||
// Next variables must be there but might not be available for some reason: this makes the
|
||||
// whole execution fail.
|
||||
|
||||
let remote_addr = self
|
||||
.socket
|
||||
.peer_addr()
|
||||
.map_err(|err| {
|
||||
error!("Can't get peer address for CGI envs: {}", err);
|
||||
err
|
||||
})
|
||||
.ok()?;
|
||||
envs.push(("REMOTE_ADDR", remote_addr.to_string()));
|
||||
envs.push(("REMOTE_HOST", remote_addr.to_string()));
|
||||
|
||||
let server_port = self
|
||||
.socket
|
||||
.local_addr()
|
||||
.map(|address| address.port())
|
||||
.map_err(|err| {
|
||||
error!("Can't get local address for CGI envs: {}", err);
|
||||
err
|
||||
})
|
||||
.ok()?;
|
||||
envs.push(("SERVER_PORT", server_port.to_string()));
|
||||
|
||||
let root_len = self.cgi_config.root.len();
|
||||
envs.push(("SCRIPT_NAME", script_path[root_len..].to_string()));
|
||||
|
||||
let server_name = self.tls.sni_hostname().or_else(|| {
|
||||
error!("Can't get SNI hostname for SERVER_NAME.");
|
||||
None
|
||||
})?;
|
||||
envs.push(("SERVER_NAME", server_name.to_string()));
|
||||
|
||||
let version = self
|
||||
.tls
|
||||
.protocol_version()
|
||||
.and_then(|v| v.as_str())
|
||||
.or_else(|| {
|
||||
error!("Can't get TLS version.");
|
||||
None
|
||||
})?;
|
||||
envs.push(("TLS_VERSION", version.to_string()));
|
||||
|
||||
let cipher = self
|
||||
.tls
|
||||
.negotiated_cipher_suite()
|
||||
.and_then(|s| s.suite().as_str())
|
||||
.or_else(|| {
|
||||
error!("Can't get TLS negociated cipher suite.");
|
||||
None
|
||||
})?;
|
||||
envs.push(("TLS_CIPHER", cipher.to_string()));
|
||||
|
||||
// Next variables are optional.
|
||||
|
||||
if let Some(path_info) = path_info {
|
||||
let percent_decode = percent_encoding::percent_decode_str(path_info);
|
||||
match percent_decode.decode_utf8() {
|
||||
Ok(path_info) => {
|
||||
envs.push(("PATH_INFO", path_info.to_string()));
|
||||
}
|
||||
Err(err) => {
|
||||
error!("CGI PATH_INFO decoded into invalid UTF-8: {}", err);
|
||||
}
|
||||
};
|
||||
}
|
||||
if let Some(query) = url.query() {
|
||||
envs.push(("QUERY_STRING", query.to_string()));
|
||||
}
|
||||
|
||||
// Variables related to client certificates.
|
||||
if let Some(certs) = self.tls.peer_certificates() {
|
||||
if certs.len() > 0 {
|
||||
envs.push(("AUTH_TYPE", String::from("Certificate")));
|
||||
let der = &certs[0].0;
|
||||
if let Ok((_, cert)) = x509_parser::parse_x509_certificate(der) {
|
||||
envs.push(("REMOTE_USER", get_common_name(cert.subject())));
|
||||
envs.push(("TLS_CLIENT_ISSUER", get_common_name(cert.issuer())));
|
||||
|
||||
let digest = ring::digest::digest(&ring::digest::SHA256, der);
|
||||
let hex_digest = hexlify(digest.as_ref());
|
||||
let client_hash = String::from("SHA256:") + &hex_digest;
|
||||
envs.push(("TLS_CLIENT_HASH", client_hash));
|
||||
|
||||
let not_valid_before = cert.validity().not_before.timestamp().to_string();
|
||||
let not_valid_after = cert.validity().not_after.timestamp().to_string();
|
||||
envs.push(("TLS_CLIENT_NOT_BEFORE", not_valid_before));
|
||||
envs.push(("TLS_CLIENT_NOT_AFTER", not_valid_after));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// CGI standard
|
||||
// AUTH_TYPE: OK
|
||||
// CONTENT_LENGTH: not affected
|
||||
// CONTENT_TYPE: not affected
|
||||
// GATEWAY_INTERFACE: OK
|
||||
// PATH_INFO: OK, decoded
|
||||
// PATH_TRANSLATED: TODO useful?
|
||||
// QUERY_STRING: OK still URL-encoded like the standard asks
|
||||
// REMOTE_ADDR: OK
|
||||
// REMOTE_HOST: use REMOTE_ADDR
|
||||
// REMOTE_IDENT: not affected
|
||||
// REMOTE_USER: OK
|
||||
// REQUEST_METHOD: empty string for compatibility
|
||||
// SCRIPT_NAME: OK
|
||||
// SERVER_NAME: OK
|
||||
// SERVER_PORT: OK
|
||||
// SERVER_PROTOCOL: OK
|
||||
// SERVER_SOFTWARE: OK
|
||||
|
||||
// Additionally proposed by gmid
|
||||
// GEMINI_DOCUMENT_ROOT: OK
|
||||
// GEMINI_SCRIPT_FILENAME: OK
|
||||
// GEMINI_URL: OK
|
||||
// GEMINI_URL_PATH: OK
|
||||
// TLS_CLIENT_ISSUER: OK
|
||||
// TLS_CLIENT_HASH: OK
|
||||
// TLS_VERSION: OK
|
||||
// TLS_CIPHER: OK
|
||||
// TLS_CIPHER_STRENGTH: pfffff
|
||||
// TLS_CLIENT_NOT_AFTER: OK but timestamp
|
||||
// TLS_CLIENT_NOT_BEFORE: OK but timestamp
|
||||
|
||||
Some(
|
||||
envs.iter()
|
||||
.map(|(k, v)| (k.to_string(), v.to_owned()))
|
||||
.collect::<HashMap<String, String>>(),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
/// Helper to get the common name of an x509 name field.
|
||||
///
|
||||
/// If there is no common name or it can't be easily converted into a string, return an empty
|
||||
/// string instead.
|
||||
fn get_common_name(x509name: &x509_parser::x509::X509Name) -> String {
|
||||
x509name
|
||||
.iter_common_name()
|
||||
.next()
|
||||
.and_then(|cn| cn.as_str().ok())
|
||||
.or(Some(""))
|
||||
.unwrap()
|
||||
.to_string()
|
||||
}
|
||||
|
||||
/// Return an hex-string representing the digest data.
|
||||
fn hexlify(digest: &[u8]) -> String {
|
||||
let mut s = String::with_capacity(digest.len() * 2);
|
||||
for b in digest {
|
||||
write!(&mut s, "{:02x}", b).unwrap();
|
||||
}
|
||||
s
|
||||
}
|
||||
194
src/main.rs
Normal file
194
src/main.rs
Normal file
|
|
@ -0,0 +1,194 @@
|
|||
use std::fs;
|
||||
use std::io;
|
||||
use std::net;
|
||||
use std::sync::Arc;
|
||||
|
||||
#[macro_use]
|
||||
extern crate clap;
|
||||
|
||||
use log::{debug, error, info};
|
||||
|
||||
pub mod cgi;
|
||||
pub mod server;
|
||||
pub mod tls;
|
||||
|
||||
use crate::cgi::CgiConfig;
|
||||
use crate::server::Server;
|
||||
use crate::tls::GeminiClientCertVerifier;
|
||||
|
||||
/// Load a PEM certificate(s) from disk.
|
||||
fn load_certificate(path: &str) -> Option<Vec<rustls::Certificate>> {
|
||||
let cert_file = match fs::File::open(path) {
|
||||
Ok(f) => f,
|
||||
Err(err) => {
|
||||
error!("Can't open certificate file at {}: {}", path, err);
|
||||
return None;
|
||||
}
|
||||
};
|
||||
let mut reader = io::BufReader::new(cert_file);
|
||||
Some(
|
||||
rustls_pemfile::certs(&mut reader)
|
||||
.unwrap()
|
||||
.iter()
|
||||
.map(|v| rustls::Certificate(v.clone()))
|
||||
.collect(),
|
||||
)
|
||||
}
|
||||
|
||||
/// Load a PEM private key from disk.
|
||||
fn load_private_key(path: &str) -> Option<rustls::PrivateKey> {
|
||||
let key_file = match fs::File::open(path) {
|
||||
Ok(f) => f,
|
||||
Err(err) => {
|
||||
error!("Can't open private key file at {}: {}", path, err);
|
||||
return None;
|
||||
}
|
||||
};
|
||||
let mut reader = io::BufReader::new(key_file);
|
||||
loop {
|
||||
match rustls_pemfile::read_one(&mut reader) {
|
||||
Ok(Some(key)) => match key {
|
||||
rustls_pemfile::Item::RSAKey(key) => return Some(rustls::PrivateKey(key)),
|
||||
rustls_pemfile::Item::PKCS8Key(key) => return Some(rustls::PrivateKey(key)),
|
||||
_ => debug!("Ignored unknown private key type."),
|
||||
},
|
||||
Ok(None) => {
|
||||
error!("No key found in file.");
|
||||
return None;
|
||||
}
|
||||
Err(err) => {
|
||||
error!("Can't parse private key data: {}", err);
|
||||
return None;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
// Get command-line args. Opal does not use config files.
|
||||
let matches = clap::App::new("Opal")
|
||||
.version(crate_version!())
|
||||
.about("Gemini CGI-only server")
|
||||
.arg(
|
||||
clap::Arg::with_name("address")
|
||||
.required(true)
|
||||
.short("a")
|
||||
.long("address")
|
||||
.help("Address to listen to")
|
||||
.takes_value(true),
|
||||
)
|
||||
.arg(
|
||||
clap::Arg::with_name("cert")
|
||||
.required(true)
|
||||
.short("c")
|
||||
.long("cert")
|
||||
.help("Path to certificate")
|
||||
.takes_value(true),
|
||||
)
|
||||
.arg(
|
||||
clap::Arg::with_name("key")
|
||||
.required(true)
|
||||
.short("k")
|
||||
.long("key")
|
||||
.help("Path to private key")
|
||||
.takes_value(true),
|
||||
)
|
||||
.arg(
|
||||
clap::Arg::with_name("root_path")
|
||||
.required(true)
|
||||
.short("p")
|
||||
.long("root-path")
|
||||
.help("Path to CGI scripts root")
|
||||
.takes_value(true),
|
||||
)
|
||||
.get_matches();
|
||||
|
||||
// Setup logging pretty much just like Agate.
|
||||
let log_config = env_logger::Env::default().default_filter_or("opal=info");
|
||||
env_logger::Builder::from_env(log_config).init();
|
||||
|
||||
// Process command-line args.
|
||||
info!("Starting Opal");
|
||||
let addr = match matches
|
||||
.value_of("address")
|
||||
.unwrap()
|
||||
.parse::<net::SocketAddr>()
|
||||
{
|
||||
Ok(a) => a,
|
||||
Err(err) => {
|
||||
error!(
|
||||
"Invalid listening address (wrong format or port missing?): {}",
|
||||
err
|
||||
);
|
||||
return;
|
||||
}
|
||||
};
|
||||
let server_certs = match load_certificate(matches.value_of("cert").unwrap()) {
|
||||
Some(v) if v.len() > 0 => v,
|
||||
Some(_) => {
|
||||
error!("No valid certificate found.");
|
||||
return;
|
||||
}
|
||||
None => return,
|
||||
};
|
||||
let server_key = match load_private_key(matches.value_of("key").unwrap()) {
|
||||
Some(k) => k,
|
||||
None => return,
|
||||
};
|
||||
let cgi_root = match fs::canonicalize(matches.value_of("root_path").unwrap()) {
|
||||
Ok(p) => p.to_str().unwrap().to_string(),
|
||||
Err(err) => {
|
||||
error!("Invalid CGI root path: {}", err);
|
||||
return;
|
||||
}
|
||||
};
|
||||
let cgi_config = CgiConfig { root: cgi_root };
|
||||
|
||||
// Setup TLS server.
|
||||
let config = Arc::new(
|
||||
match rustls::ServerConfig::builder()
|
||||
.with_safe_defaults()
|
||||
.with_client_cert_verifier(GeminiClientCertVerifier::new())
|
||||
.with_single_cert(server_certs, server_key)
|
||||
{
|
||||
Ok(c) => c,
|
||||
Err(err) => {
|
||||
error!("Invalid certificate or private key provided: {}", err);
|
||||
return;
|
||||
}
|
||||
},
|
||||
);
|
||||
let mut listener = match mio::net::TcpListener::bind(addr) {
|
||||
Ok(l) => l,
|
||||
Err(err) => {
|
||||
error!("Can't listen on port: {}", err);
|
||||
return;
|
||||
}
|
||||
};
|
||||
let listener_token = mio::Token(0);
|
||||
let mut poll = mio::Poll::new().unwrap();
|
||||
if let Err(err) =
|
||||
poll.registry()
|
||||
.register(&mut listener, listener_token, mio::Interest::READABLE)
|
||||
{
|
||||
error!("Can't setup poll listener: {}", err);
|
||||
return;
|
||||
}
|
||||
let mut server = Server::new(listener, config, &cgi_config);
|
||||
let mut events = mio::Events::with_capacity(256);
|
||||
loop {
|
||||
if let Err(err) = poll.poll(&mut events, None) {
|
||||
debug!("Poll failed: {}", err);
|
||||
continue;
|
||||
}
|
||||
for event in events.iter() {
|
||||
if event.token() == listener_token {
|
||||
if let Err(err) = server.accept(poll.registry()) {
|
||||
error!("Could not accept socket: {}", err);
|
||||
}
|
||||
} else {
|
||||
server.handle_event(poll.registry(), &event);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
263
src/server.rs
Normal file
263
src/server.rs
Normal file
|
|
@ -0,0 +1,263 @@
|
|||
//! Server listening loop and connection basics.
|
||||
|
||||
use std::collections::HashMap;
|
||||
use std::io::{self, Read, Write};
|
||||
use std::net;
|
||||
use std::sync::Arc;
|
||||
|
||||
use log::{debug, error, info};
|
||||
|
||||
use crate::cgi::CgiConfig;
|
||||
|
||||
/// TCP server, listening for clients opening TLS connections.
|
||||
pub struct Server<'a> {
|
||||
pub config: Arc<rustls::ServerConfig>,
|
||||
pub cgi_config: &'a CgiConfig,
|
||||
listener: mio::net::TcpListener,
|
||||
connections: HashMap<mio::Token, Connection<'a>>,
|
||||
next_id: usize,
|
||||
}
|
||||
|
||||
impl<'a> Server<'a> {
|
||||
/// Create a new Server.
|
||||
pub fn new(
|
||||
listener: mio::net::TcpListener,
|
||||
config: Arc<rustls::ServerConfig>,
|
||||
cgi_config: &'a CgiConfig,
|
||||
) -> Self {
|
||||
Server {
|
||||
config,
|
||||
listener,
|
||||
connections: HashMap::new(),
|
||||
next_id: 2,
|
||||
cgi_config,
|
||||
}
|
||||
}
|
||||
|
||||
/// Accept incoming client connections forever.
|
||||
pub fn accept(&mut self, registry: &mio::Registry) -> Result<(), io::Error> {
|
||||
loop {
|
||||
match self.listener.accept() {
|
||||
Ok((socket, addr)) => {
|
||||
debug!("Connection from {:?}", addr);
|
||||
let tls = match rustls::ServerConnection::new(Arc::clone(&self.config)) {
|
||||
Ok(c) => c,
|
||||
Err(err) => {
|
||||
error!("Could not create server connection: {}", err);
|
||||
continue;
|
||||
}
|
||||
};
|
||||
let token = mio::Token(self.next_id);
|
||||
self.next_id += 1;
|
||||
let mut connection = Connection::new(socket, token, tls, self.cgi_config);
|
||||
connection.register(registry);
|
||||
self.connections.insert(token, connection);
|
||||
}
|
||||
Err(ref err) if err.kind() == io::ErrorKind::WouldBlock => return Ok(()),
|
||||
Err(err) => {
|
||||
error!("Error while accepting connection: {}", err);
|
||||
return Err(err);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Pass MIO events to corresponding connections.
|
||||
pub fn handle_event(&mut self, registry: &mio::Registry, event: &mio::event::Event) {
|
||||
let token = event.token();
|
||||
if self.connections.contains_key(&token) {
|
||||
self.connections
|
||||
.get_mut(&token)
|
||||
.unwrap()
|
||||
.ready(registry, event);
|
||||
if self.connections[&token].state == ConnectionState::Closed {
|
||||
self.connections.remove(&token);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Connection state, mostly used for graceful shutdowns.
|
||||
#[derive(PartialEq)]
|
||||
pub enum ConnectionState {
|
||||
Open,
|
||||
Closing,
|
||||
Closed,
|
||||
}
|
||||
|
||||
/// A once open connection; hold the TCP and TLS states, as well as the incoming client data.
|
||||
pub struct Connection<'a> {
|
||||
pub cgi_config: &'a CgiConfig,
|
||||
pub socket: mio::net::TcpStream,
|
||||
pub tls: rustls::ServerConnection,
|
||||
pub token: mio::Token,
|
||||
pub state: ConnectionState,
|
||||
buffer: Vec<u8>,
|
||||
received: usize,
|
||||
}
|
||||
|
||||
impl<'a> Connection<'a> {
|
||||
/// Create a new Connection.
|
||||
fn new(
|
||||
socket: mio::net::TcpStream,
|
||||
token: mio::Token,
|
||||
tls_connection: rustls::ServerConnection,
|
||||
cgi_config: &'a CgiConfig,
|
||||
) -> Self {
|
||||
Connection {
|
||||
socket,
|
||||
token,
|
||||
state: ConnectionState::Open,
|
||||
tls: tls_connection,
|
||||
buffer: vec![0; 1026],
|
||||
received: 0,
|
||||
cgi_config,
|
||||
}
|
||||
}
|
||||
|
||||
/// Process an event.
|
||||
fn ready(&mut self, registry: &mio::Registry, event: &mio::event::Event) {
|
||||
if event.is_readable() {
|
||||
self.read_tls();
|
||||
self.read_plain();
|
||||
}
|
||||
if event.is_writable() {
|
||||
self.write_tls_with_errors();
|
||||
}
|
||||
if self.state == ConnectionState::Closing {
|
||||
if let Err(err) = self.socket.shutdown(net::Shutdown::Both) {
|
||||
error!("Could not properly shutdown socket: {}", err);
|
||||
}
|
||||
self.state = ConnectionState::Closed;
|
||||
registry.deregister(&mut self.socket).unwrap();
|
||||
} else {
|
||||
let event_set = self.event_set();
|
||||
registry
|
||||
.reregister(&mut self.socket, self.token, event_set)
|
||||
.unwrap();
|
||||
}
|
||||
}
|
||||
|
||||
/// Read data from the TLS tunnel; if enough data is read, new packets are processed and can be
|
||||
/// later read with `read_plain`.
|
||||
fn read_tls(&mut self) {
|
||||
match self.tls.read_tls(&mut self.socket) {
|
||||
Err(err) => {
|
||||
if err.kind() != io::ErrorKind::WouldBlock {
|
||||
error!("TLS read error: {}", err);
|
||||
self.state = ConnectionState::Closing;
|
||||
}
|
||||
return;
|
||||
}
|
||||
Ok(num_bytes) if num_bytes == 0 => {
|
||||
self.state = ConnectionState::Closing;
|
||||
return;
|
||||
}
|
||||
_ => {}
|
||||
};
|
||||
|
||||
if let Err(err) = self.tls.process_new_packets() {
|
||||
error!("Can't process packet: {}", err);
|
||||
self.write_tls_with_errors();
|
||||
self.state = ConnectionState::Closing;
|
||||
}
|
||||
}
|
||||
|
||||
/// Process packets with incoming data from a client.
|
||||
fn read_plain(&mut self) {
|
||||
if let Ok(io_state) = self.tls.process_new_packets() {
|
||||
let to_read = io_state.plaintext_bytes_to_read();
|
||||
if to_read > 0 {
|
||||
let mut buffer = vec![0u8; to_read];
|
||||
self.tls.reader().read(&mut buffer).unwrap();
|
||||
self.handle_incoming_data(&buffer);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Process received client data as a Gemini request; it either is a self-contained
|
||||
fn handle_incoming_data(&mut self, data: &[u8]) {
|
||||
// The connection buffer should never exceed 1026 bytes: 1024 URL bytes plus \r\n.
|
||||
if data.len() + self.received > 1026 {
|
||||
error!("URL queried is longer 1024 bytes, discarding.");
|
||||
self.state = ConnectionState::Closing;
|
||||
return;
|
||||
}
|
||||
// If the URL requested is contained within that single data packet, process it without
|
||||
// copying stuff.
|
||||
if self.received == 0 && data.ends_with(b"\r\n") {
|
||||
self.process_buffer(data);
|
||||
}
|
||||
// Else append received data into the connection buffer and try to process it.
|
||||
else {
|
||||
let buffer_end = self.received + data.len();
|
||||
self.buffer[self.received..buffer_end].copy_from_slice(data);
|
||||
self.received = buffer_end;
|
||||
if self.buffer[..self.received].ends_with(b"\r\n") {
|
||||
self.process_buffer(&self.buffer.clone());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Respond to a client request. Whether the request succeeds or not, a response is sent and
|
||||
/// the connection is closed.
|
||||
fn process_buffer(&mut self, buffer: &[u8]) {
|
||||
// Get appropriate response from either Opal or the CGI process.
|
||||
let response: Vec<u8> = match self.get_response(buffer) {
|
||||
Ok((url, data)) => {
|
||||
info!("\"{}\" → reply {} bytes", url, data.len());
|
||||
data
|
||||
}
|
||||
Err((url, code, meta)) => {
|
||||
info!(
|
||||
"\"{}\" → {} \"{}\"",
|
||||
url.or(Some("<invalid URL>".to_string())).unwrap(),
|
||||
code,
|
||||
meta
|
||||
);
|
||||
format!("{} {}\r\n", code, meta).as_bytes().to_vec()
|
||||
}
|
||||
};
|
||||
// Whether the request succeeded or not, send the response.
|
||||
if let Err(err) = self.tls.writer().write_all(&response) {
|
||||
error!("Error while writing TLS data: {}", err);
|
||||
}
|
||||
// Properly close the connection.
|
||||
self.tls.send_close_notify();
|
||||
self.state = ConnectionState::Closing;
|
||||
}
|
||||
|
||||
/// Write TLS data in the TCP socket.
|
||||
fn write_tls(&mut self) -> io::Result<usize> {
|
||||
self.tls.write_tls(&mut self.socket)
|
||||
}
|
||||
|
||||
/// Call `write_tls` and mark connection as closing on error.
|
||||
fn write_tls_with_errors(&mut self) {
|
||||
if let Err(err) = self.write_tls() {
|
||||
error!("TLS write error after errors: {}", err);
|
||||
self.state = ConnectionState::Closing;
|
||||
}
|
||||
}
|
||||
|
||||
/// Register the connection into the MIO registry using its own token.
|
||||
fn register(&mut self, registry: &mio::Registry) {
|
||||
let event_set = self.event_set();
|
||||
registry
|
||||
.register(&mut self.socket, self.token, event_set)
|
||||
.unwrap();
|
||||
}
|
||||
|
||||
/// Return what IO events we're currently waiting for, based on wants_read/wants_write.
|
||||
fn event_set(&self) -> mio::Interest {
|
||||
let r = self.tls.wants_read();
|
||||
let w = self.tls.wants_write();
|
||||
if r && w {
|
||||
mio::Interest::READABLE | mio::Interest::WRITABLE
|
||||
} else if w {
|
||||
mio::Interest::WRITABLE
|
||||
} else {
|
||||
mio::Interest::READABLE
|
||||
}
|
||||
}
|
||||
}
|
||||
86
src/tls.rs
Normal file
86
src/tls.rs
Normal file
|
|
@ -0,0 +1,86 @@
|
|||
//! Trying desperately to not implement a security colander.
|
||||
|
||||
use std::sync::Arc;
|
||||
|
||||
type SignatureAlgorithms = &'static [&'static webpki::SignatureAlgorithm];
|
||||
|
||||
/// Supported signature verification mechanisms; copied from Rustls source.
|
||||
static SUPPORTED_SIG_ALGS: SignatureAlgorithms = &[
|
||||
&webpki::ECDSA_P256_SHA256,
|
||||
&webpki::ECDSA_P256_SHA384,
|
||||
&webpki::ECDSA_P384_SHA256,
|
||||
&webpki::ECDSA_P384_SHA384,
|
||||
&webpki::ED25519,
|
||||
&webpki::RSA_PSS_2048_8192_SHA256_LEGACY_KEY,
|
||||
&webpki::RSA_PSS_2048_8192_SHA384_LEGACY_KEY,
|
||||
&webpki::RSA_PSS_2048_8192_SHA512_LEGACY_KEY,
|
||||
&webpki::RSA_PKCS1_2048_8192_SHA256,
|
||||
&webpki::RSA_PKCS1_2048_8192_SHA384,
|
||||
&webpki::RSA_PKCS1_2048_8192_SHA512,
|
||||
&webpki::RSA_PKCS1_3072_8192_SHA384,
|
||||
];
|
||||
|
||||
/// A `ClientCertVerifier` for Gemini.
|
||||
///
|
||||
/// Client certificate is optional. When provided, we check that it is valid for use by a client.
|
||||
/// No certificate chain is verified as client certs in Gemini are mostly self-signed anyway.
|
||||
/// Signature verification is left to the default implementation.
|
||||
pub struct GeminiClientCertVerifier {}
|
||||
|
||||
impl GeminiClientCertVerifier {
|
||||
pub fn new() -> Arc<dyn rustls::server::ClientCertVerifier> {
|
||||
Arc::new(Self {})
|
||||
}
|
||||
}
|
||||
|
||||
impl rustls::server::ClientCertVerifier for GeminiClientCertVerifier {
|
||||
/// Make client certificate optional.
|
||||
fn client_auth_mandatory(&self) -> Option<bool> {
|
||||
Some(false)
|
||||
}
|
||||
|
||||
/// Do not provide CA names.
|
||||
fn client_auth_root_subjects(&self) -> Option<rustls::DistinguishedNames> {
|
||||
Some(vec![])
|
||||
}
|
||||
|
||||
/// “Verify” client certificates.
|
||||
///
|
||||
/// Actually do not verify much, mostly that the certificate is well-formed. Like Rustls, we
|
||||
/// rely on the WebPKI crate to verify the certificate. It rejects self-signed client
|
||||
/// certificates early in the verification stage (we can't do much against that), and we ignore
|
||||
/// that error because Gemini clients mostly use self-signed certificates, so we can miss other
|
||||
/// WebPKI verifications errors. We should use a validation process that reports all issues
|
||||
/// found or provide a way to filter acceptable issues, but we can't blame anyone on this…
|
||||
fn verify_client_cert(
|
||||
&self,
|
||||
end_entity: &rustls::Certificate,
|
||||
intermediates: &[rustls::Certificate],
|
||||
now: std::time::SystemTime,
|
||||
) -> Result<rustls::server::ClientCertVerified, rustls::Error> {
|
||||
let cert = webpki::EndEntityCert::try_from(end_entity.0.as_ref())
|
||||
.map_err(|_| rustls::Error::InvalidCertificateEncoding)?;
|
||||
let now = webpki::Time::try_from(now).map_err(|_| rustls::Error::FailedToGetCurrentTime)?;
|
||||
let verified = rustls::server::ClientCertVerified::assertion();
|
||||
match cert.verify_is_valid_tls_client_cert(
|
||||
SUPPORTED_SIG_ALGS,
|
||||
&webpki::TlsClientTrustAnchors(&vec![]),
|
||||
&intermediates
|
||||
.iter()
|
||||
.map(|c| c.0.as_ref())
|
||||
.collect::<Vec<&[u8]>>(),
|
||||
now,
|
||||
) {
|
||||
Ok(()) => Ok(verified),
|
||||
Err(e) => match e {
|
||||
// It's OK for client certs to be self-signed.
|
||||
webpki::Error::CaUsedAsEndEntity => Ok(verified),
|
||||
// Any other error is fatal.
|
||||
_ => Err(rustls::Error::InvalidCertificateData(format!(
|
||||
"invalid client cert: {}",
|
||||
e
|
||||
))),
|
||||
},
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in a new issue