From b6c32fc05a1939419b983970afcea3bb8b62825d Mon Sep 17 00:00:00 2001
From: Klaus Post <klauspost@gmail.com>
Date: Wed, 26 Oct 2022 17:37:42 +0200
Subject: [PATCH] Transfer returned checksum values (#1719)

Checksums were missing from multipart uploads.
---
 api-datatypes.go            | 2 ++
 api-put-object-multipart.go | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/api-datatypes.go b/api-datatypes.go
index d6795a024..1f4793877 100644
--- a/api-datatypes.go
+++ b/api-datatypes.go
@@ -87,6 +87,8 @@ type UploadInfo struct {
 	ExpirationRuleID string
 
 	// Verified checksum values, if any.
+	// Values are base64 (standard) encoded.
+	// For multipart objects this is a checksum of the checksum of each part.
 	ChecksumCRC32  string
 	ChecksumCRC32C string
 	ChecksumSHA1   string
diff --git a/api-put-object-multipart.go b/api-put-object-multipart.go
index e4c958882..3c9a13ff2 100644
--- a/api-put-object-multipart.go
+++ b/api-put-object-multipart.go
@@ -448,5 +448,10 @@ func (c *Client) completeMultipartUpload(ctx context.Context, bucketName, object
 		Location:         completeMultipartUploadResult.Location,
 		Expiration:       expTime,
 		ExpirationRuleID: ruleID,
+
+		ChecksumSHA256: completeMultipartUploadResult.ChecksumSHA256,
+		ChecksumSHA1:   completeMultipartUploadResult.ChecksumSHA1,
+		ChecksumCRC32:  completeMultipartUploadResult.ChecksumCRC32,
+		ChecksumCRC32C: completeMultipartUploadResult.ChecksumCRC32C,
 	}, nil
 }