fix(object_store): Include Content-MD5 header for S3 DeleteObjects (#5415)

* fix(object_store): Include Content-MD5 header for S3 DeleteObjects

S3 API [specification](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html)
requires the presence of this header for all `DeleteObjects` requests to
general purpose buckets:

> The Content-MD5 request header is required for all Multi-Object Delete requests

Some platform, such as MinIO, enforce this requirement, failing requests
that don't include the header.

* Switch dependency from md5 to md-5

md-5 seems better maintained.

Author: paraseba

object_store/Cargo.toml

@@ -54,6 +54,7 @@ reqwest = { version = "0.11", default-features = false, features = ["rustls-tls-
 ring = { version = "0.17", default-features = false, features = ["std"], optional = true }
 rustls-pemfile = { version = "2.0", default-features = false, features = ["std"], optional = true }
 tokio = { version = "1.25.0", features = ["sync", "macros", "rt", "time", "io-util"] }
+md-5 = { version = "0.10.6", default-features = false, optional = true }
 
 [target.'cfg(target_family="unix")'.dev-dependencies]
 nix = { version = "0.27.1", features = ["fs"] }
@@ -62,7 +63,7 @@ nix = { version = "0.27.1", features = ["fs"] }
 cloud = ["serde", "serde_json", "quick-xml", "hyper", "reqwest", "reqwest/json", "reqwest/stream", "chrono/serde", "base64", "rand", "ring"]
 azure = ["cloud"]
 gcp = ["cloud", "rustls-pemfile"]
-aws = ["cloud"]
+aws = ["cloud", "md-5"]
 http = ["cloud"]
 tls-webpki-roots = ["reqwest?/rustls-tls-webpki-roots"]
 

object_store/src/aws/client.rs

@@ -43,6 +43,7 @@ use bytes::{Buf, Bytes};
 use hyper::http;
 use hyper::http::HeaderName;
 use itertools::Itertools;
+use md5::{Digest, Md5};
 use percent_encoding::{utf8_percent_encode, PercentEncode};
 use quick_xml::events::{self as xml_events};
 use reqwest::{
@@ -438,6 +439,14 @@ impl S3Client {
             None
         };
 
+        // S3 *requires* DeleteObjects to include a Content-MD5 header:
+        // https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html
+        // >   "The Content-MD5 request header is required for all Multi-Object Delete requests"
+        // Some platforms, like MinIO, enforce this requirement and fail requests without the header.
+        let mut hasher = Md5::new();
+        hasher.update(&body);
+        builder = builder.header("Content-MD5", BASE64_STANDARD.encode(hasher.finalize()));
+
         let response = builder
             .header(CONTENT_TYPE, "application/xml")
             .body(body)