commit 7ef914153b1e2753ae6fee16c521130b3d2f65b4
parent bd2bc310d9a472c21e45af63fd4b4acfb3370ec7
Author: Johann150 <johann.galle@protonmail.com>
Date: Sat, 14 Nov 2020 11:15:30 +0100
add host and port checks
If the host does not match, the status code 53 should be used. But I am not sure how
to implement this best as the parse_request function only returns a String as error.
Diffstat:
2 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/README.md b/README.md
@@ -27,12 +27,15 @@ openssl req -x509 -newkey rsa:4096 -keyout key.rsa -out cert.pem \
-days 3650 -nodes -subj "/CN=example.com"
```
-3. Run the server. The command line arguments are `agate <addr:port> <content_dir> <cert_file> <key_file>`. For example, to listen on the standard Gemini port (1965) on all interfaces:
+3. Run the server. The command line arguments are `agate <addr:port> <content_dir> <cert_file> <key_file> [<domain>]`. For example, to listen on the standard Gemini port (1965) on all interfaces:
```
agate 0.0.0.0:1965 path/to/content/ cert.pem key.rsa
```
+Agate will check that the port part of the requested URL matches the port specified in the 1st argument.
+If `<domain>` is specified, agate will also check that the host part of the requested URL matches this domain.
+
When a client requests the URL `gemini://example.com/foo/bar`, Agate will respond with the file at `path/to/content/foo/bar`. If there is a directory at that path, Agate will look for a file named `index.gmi` inside that directory.
Optionally, set a log level via the `AGATE_LOG` environment variable. Logging is powered by the [env_logger crate](https://crates.io/crates/env_logger):
diff --git a/src/main.rs b/src/main.rs
@@ -25,7 +25,7 @@ fn main() -> Result {
type Result<T=()> = std::result::Result<T, Box<dyn Error + Send + Sync>>;
static ARGS: Lazy<Args> = Lazy::new(|| args().unwrap_or_else(|| {
- eprintln!("usage: agate <addr:port> <dir> <cert> <key>");
+ eprintln!("usage: agate <addr:port> <dir> <cert> <key> [<domain to check>]");
std::process::exit(1);
}));
@@ -34,6 +34,7 @@ struct Args {
content_dir: String,
cert_file: String,
key_file: String,
+ domain: Option<String>,
}
fn args() -> Option<Args> {
@@ -43,6 +44,7 @@ fn args() -> Option<Args> {
content_dir: args.next()?,
cert_file: args.next()?,
key_file: args.next()?,
+ domain: args.next(),
})
}
@@ -108,9 +110,15 @@ async fn parse_request<R: Read + Unpin>(stream: &mut R) -> Result<Url> {
Url::parse(request)?
};
- // Validate the URL. TODO: Check the hostname and port.
+ // Validate the URL, host and port.
if url.scheme() != "gemini" {
+ // FIXME: This should return a 53 status code.
Err("unsupported URL scheme")?
+ } else if ARGS.domain.as_ref().map_or(false, |domain| url.host().map_or(false, |host| &host.to_string() != domain)) {
+ // FIXME: This should return a 53 status code.
+ Err("proxy request refused")?
+ } else if url.port().map_or(false, |port| port != ARGS.sock_addr.rsplitn(2, ':').next().unwrap().parse().unwrap()) {
+ Err("port did not match")?
}
log::info!("Got request for {:?}", url);
Ok(url)