@@ -0,0 +1,62 @@
+// Copyright (c) 2019 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+use std::io::{self, Read};
+use std::env;
+use xmpp_parsers::{
+ TryFrom,
+ Element,
+ disco::DiscoInfoResult,
+ caps::{Caps, compute_disco as compute_disco_caps, hash_caps},
+ ecaps2::{ECaps2, compute_disco as compute_disco_ecaps2, hash_ecaps2},
+ hashes::Algo,
+};
+
+fn get_caps(disco: &DiscoInfoResult, node: String) -> Result<Caps, String> {
+ let caps_data = compute_disco_caps(&disco);
+ let caps_hash = hash_caps(&caps_data, Algo::Sha_1)?;
+ Ok(Caps::new(node, caps_hash))
+}
+
+fn get_ecaps2(disco: &DiscoInfoResult) -> Result<ECaps2, String> {
+ let ecaps2_data = compute_disco_ecaps2(&disco).unwrap();
+ let ecaps2_sha256 = hash_ecaps2(&ecaps2_data, Algo::Sha_256)?;
+ let ecaps2_sha3_256 = hash_ecaps2(&ecaps2_data, Algo::Sha3_256)?;
+ Ok(ECaps2::new(vec![ecaps2_sha256, ecaps2_sha3_256]))
+}
+
+fn main() -> Result<(), ()> {
+ let args: Vec<_> = env::args().collect();
+ if args.len() != 2 {
+ println!("Usage: {} <node>", args[0]);
+ return Err(());
+ }
+ let node = args[1].clone();
+
+ eprintln!("Reading a disco#info payload from stdin...");
+
+ // Read from stdin.
+ let stdin = io::stdin();
+ let mut data = String::new();
+ let mut handle = stdin.lock();
+ handle.read_to_string(&mut data).unwrap();
+
+ // Parse the payload into a DiscoInfoResult.
+ let elem: Element = data.parse().unwrap();
+ let disco = DiscoInfoResult::try_from(elem).unwrap();
+
+ // Compute both kinds of caps.
+ let caps = get_caps(&disco, node).unwrap();
+ let ecaps2 = get_ecaps2(&disco).unwrap();
+
+ // Print them.
+ let caps_elem = Element::from(caps);
+ let ecaps2_elem = Element::from(ecaps2);
+ println!("{}", String::from(&caps_elem));
+ println!("{}", String::from(&ecaps2_elem));
+
+ Ok(())
+}