tokio-xmpp: explicitly set default CryptoProvider in all examples

This way, we don't end up with breakage if rustls is built with more
than one provider enabled. This can (and does) happen if a transitive
dependency (such as reqwest *hinthint*) depends on a specific,
non-default rustls backend.

tokio-xmpp/examples/contact_addr.rs

@@ -2,7 +2,7 @@ use futures::stream::StreamExt;
 use std::env::args;
 use std::process::exit;
 use std::str::FromStr;
-use tokio_xmpp::{Client, IqRequest, IqResponse};
+use tokio_xmpp::{rustls, Client, IqRequest, IqResponse};
 use xmpp_parsers::{
     disco::{DiscoInfoQuery, DiscoInfoResult},
     jid::{BareJid, Jid},
@@ -14,6 +14,11 @@ use xmpp_parsers::{
 async fn main() {
     env_logger::init();
 
+    #[cfg(feature = "tls-rust")]
+    rustls::crypto::aws_lc_rs::default_provider()
+        .install_default()
+        .expect("failed to install rustls crypto provider");
+
     let args: Vec<String> = args().collect();
     if args.len() != 4 {
         println!("Usage: {} <jid> <password> <target>", args[0]);

tokio-xmpp/examples/download_avatars.rs

@@ -4,7 +4,7 @@ use std::fs::{create_dir_all, File};
 use std::io::{self, Write};
 use std::process::exit;
 use std::str::FromStr;
-use tokio_xmpp::{Client, Stanza};
+use tokio_xmpp::{rustls, Client, Stanza};
 use xmpp_parsers::{
     avatar::{Data as AvatarData, Metadata as AvatarMetadata},
     caps::{compute_disco, hash_caps, Caps},
@@ -26,6 +26,11 @@ use xmpp_parsers::{
 async fn main() {
     env_logger::init();
 
+    #[cfg(feature = "tls-rust")]
+    rustls::crypto::aws_lc_rs::default_provider()
+        .install_default()
+        .expect("failed to install rustls crypto provider");
+
     let args: Vec<String> = args().collect();
     if args.len() != 3 {
         println!("Usage: {} <jid> <password>", args[0]);

tokio-xmpp/examples/echo_bot.rs

@@ -2,7 +2,7 @@ use futures::stream::StreamExt;
 use std::env::args;
 use std::process::exit;
 use std::str::FromStr;
-use tokio_xmpp::Client;
+use tokio_xmpp::{rustls, Client};
 use xmpp_parsers::jid::{BareJid, Jid};
 use xmpp_parsers::message::{Lang, Message, MessageType};
 use xmpp_parsers::presence::{Presence, Show as PresenceShow, Type as PresenceType};
@@ -11,6 +11,11 @@ use xmpp_parsers::presence::{Presence, Show as PresenceShow, Type as PresenceTyp
 async fn main() {
     env_logger::init();
 
+    #[cfg(feature = "tls-rust")]
+    rustls::crypto::aws_lc_rs::default_provider()
+        .install_default()
+        .expect("failed to install rustls crypto provider");
+
     let args: Vec<String> = args().collect();
     if args.len() != 3 {
         println!("Usage: {} <jid> <password>", args[0]);

tokio-xmpp/examples/echo_component.rs

@@ -6,12 +6,17 @@ use xmpp_parsers::jid::Jid;
 use xmpp_parsers::message::{Lang, Message, MessageType};
 use xmpp_parsers::presence::{Presence, Show as PresenceShow, Type as PresenceType};
 
-use tokio_xmpp::{connect::DnsConfig, Component};
+use tokio_xmpp::{connect::DnsConfig, rustls, Component};
 
 #[tokio::main]
 async fn main() {
     env_logger::init();
 
+    #[cfg(feature = "tls-rust")]
+    rustls::crypto::aws_lc_rs::default_provider()
+        .install_default()
+        .expect("failed to install rustls crypto provider");
+
     let args: Vec<String> = args().collect();
     if args.len() < 3 || args.len() > 4 {
         println!("Usage: {} <jid> <password> [server:port]", args[0]);

tokio-xmpp/examples/echo_server.rs

@@ -4,11 +4,17 @@ use tokio::{self, io, net::TcpSocket};
 use tokio_xmpp::{
     minidom::Element,
     parsers::stream_features::StreamFeatures,
+    rustls,
     xmlstream::{accept_stream, StreamHeader, Timeouts},
 };
 
 #[tokio::main]
 async fn main() -> Result<(), io::Error> {
+    #[cfg(feature = "tls-rust")]
+    rustls::crypto::aws_lc_rs::default_provider()
+        .install_default()
+        .expect("failed to install rustls crypto provider");
+
     // TCP socket
     let address = "127.0.0.1:5222".parse().unwrap();
     let socket = TcpSocket::new_v4()?;

tokio-xmpp/examples/keep_connection.rs

@@ -26,6 +26,7 @@ use tokio_xmpp::{
         jid::{BareJid, Jid},
         ping,
     },
+    rustls,
     stanzastream::StanzaStream,
     xmlstream::Timeouts,
 };
@@ -34,6 +35,11 @@ use tokio_xmpp::{
 async fn main() {
     env_logger::init();
 
+    #[cfg(feature = "tls-rust")]
+    rustls::crypto::aws_lc_rs::default_provider()
+        .install_default()
+        .expect("failed to install rustls crypto provider");
+
     let args: Vec<String> = args().collect();
     if args.len() != 3 {
         println!("Usage: {} <jid> <password>", args[0]);