Update to base64 0.21

src/tools.rs

@@ -12,6 +12,7 @@ use std::str::from_utf8;
 use std::time::{Duration, SystemTime};
 
 use anyhow::{bail, Context as _, Result};
+use base64::Engine as _;
 use chrono::{Local, TimeZone};
 use futures::{StreamExt, TryStreamExt};
 use mailparse::dateparse;
@@ -276,12 +277,6 @@ async fn maybe_warn_on_outdated(context: &Context, now: i64, approx_compile_time
 /// - for INCOMING messages, the ID is taken from the Chat-Group-ID-header or from the Message-ID in the In-Reply-To: or References:-Header
 /// - the group-id should be a string with the characters [a-zA-Z0-9\-_]
 pub(crate) fn create_id() -> String {
-    const URL_SAFE_ENGINE: base64::engine::fast_portable::FastPortable =
-        base64::engine::fast_portable::FastPortable::from(
-            &base64::alphabet::URL_SAFE,
-            base64::engine::fast_portable::NO_PAD,
-        );
-
     // ThreadRng implements CryptoRng trait and is supposed to be cryptographically secure.
     let mut rng = thread_rng();
 
@@ -290,7 +285,8 @@ pub(crate) fn create_id() -> String {
     rng.fill(&mut arr[..]);
 
     // Take 11 base64 characters containing 66 random bits.
-    base64::encode_engine(arr, &URL_SAFE_ENGINE)
+    base64::engine::general_purpose::URL_SAFE
+        .encode(arr)
         .chars()
         .take(11)
         .collect()