fix: CompleteMultipartUpload encryption (#626)

Cargo.lock

@@ -4422,9 +4422,9 @@ checksum = "ae960838283323069879657ca3de837e9f7bbb4c7bf6ea7f1b290d5e9476d2e0"
 
 [[package]]
 name = "memchr"
-version = "2.7.5"
+version = "2.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a282da65faaf38286cf3be983213fcf1d2e2a58700e808f83f4ea9a4804bc0"
+checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
 
 [[package]]
 name = "memmap2"
@@ -4667,15 +4667,6 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
-[[package]]
-name = "nugine-rust-utils"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04dcd9cfa92246a9c7ca0671e00733c4e9d77ee1fa0ae08c9a181b7c8802aea2"
-dependencies = [
- "simdutf8",
-]
-
 [[package]]
 name = "num"
 version = "0.4.3"
@@ -7056,9 +7047,9 @@ checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
 
 [[package]]
 name = "s3s"
-version = "0.12.0-rc.1"
+version = "0.12.0-rc.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0c7ae94d88d3d0d4ab0cb3f8e106199832b2943609680b5d75b0d7f686f6be3"
+checksum = "6fbf35b8b229398629d8df8a0cb908a70a24da69f65911fe0461fba3f4e9dda5"
 dependencies = [
  "arrayvec",
  "async-trait",
@@ -7066,6 +7057,7 @@ dependencies = [
  "base64-simd",
  "bytes",
  "bytestring",
+ "cfg-if",
  "chrono",
  "const-str",
  "crc32c",
@@ -7084,7 +7076,6 @@ dependencies = [
  "memchr",
  "mime",
  "nom 7.1.3",
- "nugine-rust-utils",
  "numeric_cast",
  "pin-project-lite",
  "quick-xml 0.37.5",

Cargo.toml

@@ -210,7 +210,7 @@ rustfs-rsc = "2025.506.1"
 rustls = { version = "0.23.32", features = ["ring", "logging", "std", "tls12"], default-features = false }
 rustls-pki-types = "1.12.0"
 rustls-pemfile = "2.2.0"
-s3s = { version = "0.12.0-rc.1", features = ["minio"] }
+s3s = { version = "0.12.0-rc.2", features = ["minio"] }
 schemars = "1.0.4"
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = { version = "1.0.145", features = ["raw_value"] }

crates/e2e_test/src/kms/bucket_default_encryption_test.rs

@@ -388,23 +388,11 @@ async fn test_bucket_default_encryption_multipart_upload() -> Result<(), Box<dyn
         complete_multipart_response.ssekms_key_id()
     );
 
-    // Verify: complete_multipart_upload response should contain encryption information
-    // KNOWN BUG: s3s library bug where CompleteMultipartUploadOutput encryption fields serialize as None
-    // even when properly set. Our server implementation is correct (see server logs above).
-    // TODO: Remove this workaround when s3s library is fixed
-    warn!("KNOWN BUG: s3s library - complete_multipart_upload response encryption fields return None even when set");
-
-    if complete_multipart_response.server_side_encryption().is_some() {
-        // If s3s library is fixed, verify the encryption info
-        assert_eq!(
-            complete_multipart_response.server_side_encryption(),
-            Some(&ServerSideEncryption::AwsKms),
-            "complete_multipart_upload response should contain SSE-KMS encryption information"
-        );
-    } else {
-        // Expected behavior due to s3s library bug - log and continue
-        warn!("Skipping assertion due to known s3s library bug - server logs confirm correct encryption handling");
-    }
+    assert_eq!(
+        complete_multipart_response.server_side_encryption(),
+        Some(&ServerSideEncryption::AwsKms),
+        "complete_multipart_upload response should contain SSE-KMS encryption information"
+    );
 
     // Step 4: Download file and verify encryption status
     info!("Downloading file and verifying encryption status");