chore(deps): update base64 requirement from 0.13 to 0.21 (#89)

* chore(deps): update base64 requirement from 0.13 to 0.21

Updates the requirements on [base64](https://github.com/marshallpierce/rust-base64) to permit the latest version.
- [Release notes](https://github.com/marshallpierce/rust-base64/releases)
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](marshallpierce/rust-base64@v0.13.0...v0.21.0)

---
updated-dependencies:
- dependency-name: base64
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

* fix: fix removed methods

* fix: indifferent padding

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Raphael Taylor-Davies <[email protected]>

pbjson-types/src/wrappers.rs

@@ -32,7 +32,9 @@ macro_rules! ser_bytes_value {
             where
                 S: serde::Serializer,
             {
-                let value = pbjson::private::base64::encode(&self.value);
+                use pbjson::private::base64::engine::Engine;
+                let value =
+                    pbjson::private::base64::engine::general_purpose::STANDARD.encode(&self.value);
                 value.serialize(ser)
             }
         }

pbjson/Cargo.toml

@@ -12,7 +12,7 @@ repository = "https://github.com/influxdata/pbjson"
 [dependencies]
 
 serde = { version = "1.0", features = ["derive"] }
-base64 = "0.13"
+base64 = "0.21"
 
 [dev-dependencies]
 bytes = "1.0"

pbjson/src/lib.rs

@@ -22,6 +22,9 @@ pub mod private {
     /// Re-export base64
     pub use base64;
 
+    use base64::engine::DecodePaddingMode;
+    use base64::engine::{GeneralPurpose, GeneralPurposeConfig};
+    use base64::Engine;
     use serde::de::Visitor;
     use serde::Deserialize;
     use std::borrow::Cow;
@@ -69,7 +72,15 @@ pub mod private {
         where
             E: serde::de::Error,
         {
-            let decoded = base64::decode_config(s, base64::STANDARD)
+            const INDIFFERENT_PAD: GeneralPurposeConfig = GeneralPurposeConfig::new()
+                .with_decode_padding_mode(DecodePaddingMode::Indifferent);
+            const STANDARD_INDIFFERENT_PAD: GeneralPurpose =
+                GeneralPurpose::new(&base64::alphabet::STANDARD, INDIFFERENT_PAD);
+            const URL_SAFE_INDIFFERENT_PAD: GeneralPurpose =
+                GeneralPurpose::new(&base64::alphabet::URL_SAFE, INDIFFERENT_PAD);
+
+            let decoded = STANDARD_INDIFFERENT_PAD
+                .decode(s)
                 .or_else(|e| match e {
                     // Either standard or URL-safe base64 encoding are accepted
                     //
@@ -78,7 +89,7 @@ pub mod private {
                     // Therefore if we error out on those characters, try again with
                     // the URL-safe character set
                     base64::DecodeError::InvalidByte(_, c) if c == b'-' || c == b'_' => {
-                        base64::decode_config(s, base64::URL_SAFE)
+                        URL_SAFE_INDIFFERENT_PAD.decode(s)
                     }
                     _ => Err(e),
                 })
@@ -105,6 +116,7 @@ pub mod private {
     #[cfg(test)]
     mod tests {
         use super::*;
+        use base64::Engine;
         use bytes::Bytes;
         use rand::prelude::*;
         use serde::de::value::{BorrowedStrDeserializer, Error};
@@ -117,12 +129,12 @@ pub mod private {
                 let raw: Vec<_> = std::iter::from_fn(|| Some(rng.gen())).take(len).collect();
 
                 for config in [
-                    base64::STANDARD,
-                    base64::STANDARD_NO_PAD,
-                    base64::URL_SAFE,
-                    base64::URL_SAFE_NO_PAD,
+                    base64::engine::general_purpose::STANDARD,
+                    base64::engine::general_purpose::STANDARD_NO_PAD,
+                    base64::engine::general_purpose::URL_SAFE,
+                    base64::engine::general_purpose::URL_SAFE_NO_PAD,
                 ] {
-                    let encoded = base64::encode_config(&raw, config);
+                    let encoded = config.encode(&raw);
 
                     let deserializer = BorrowedStrDeserializer::<'_, Error>::new(&encoded);
                     let a: Bytes = BytesDeserialize::deserialize(deserializer).unwrap().0;