base64: be a tolerant reader

src/lib.rs

@@ -81,3 +81,8 @@ impl Config {
         self.files.iter().find(|f| f.path == path)
     }
 }
+
+pub fn base64_decode(s: &str) -> Result<Vec<u8>, base64::DecodeError> {
+    use base64::{prelude::BASE64_STANDARD_NO_PAD as B64, Engine};
+    B64.decode(s.trim_end_matches('='))
+}