// Verify if the underlying error is signature mismatch.
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	etag := partInfo.ETag
	if kind, encrypted := crypto.IsEncrypted(mi.UserDefined); encrypted {
		switch kind {
		case crypto.S3KMS:
			w.Header().Set(xhttp.AmzServerSideEncryption, xhttp.AmzEncryptionKMS)
			w.Header().Set(xhttp.AmzServerSideEncryptionKmsID, mi.KMSKeyID())

	//
	// Therefore, we adjust all ETags sent by the client to match what is stored
	// on the backend.
	kind, _ := crypto.IsEncrypted(fi.Metadata)

	var objectEncryptionKey []byte
	switch kind {
	case crypto.SSEC:
		if checksumType.IsSet() {
			if opts.EncryptFn == nil {
				return oi, crypto.ErrMissingCustomerKey
			}

		} else {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		}
		return
	}

	// Set encryption response headers
	switch kind, _ := crypto.IsEncrypted(objInfo.UserDefined); kind {
	case crypto.S3:
		w.Header().Set(xhttp.AmzServerSideEncryption, xhttp.AmzEncryptionAES)
	case crypto.S3KMS:
		w.Header().Set(xhttp.AmzServerSideEncryption, xhttp.AmzEncryptionKMS)

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

		if errs[index] != nil {
			continue
		}

		if readData {
			metaFileInfos[index].Data = metadataArray[index].data.find(versionID)
		}
	}
	if !readData {
		for i := range v2bufs {
			metaDataPoolPut(v2bufs[i])
		}
	}

	// Return all the metadata.
	return metaFileInfos, errs
}