S3 Multipart Upload into ObjectLock enabled bucket (go, sdk-v2)

[AAZANOVICH]

My understanding is that when upload to ObjectLock enabled bucket it is required to provide precomputed md5 hash of the file.
However when multipart upload is used I guess we need to provide md5 for each part ? If so how to do it ?
The below code does not work for multipart, how to do it with aws-sdk-go-v2 ?

largeBuffer := bytes.NewReader(largeObject)
	var partMiBs int64 = 10
	uploader := manager.NewUploader(t.s3Client, func(u *manager.Uploader) {
		u.PartSize = partMiBs * 1024 * 1024
	})
	hash := md5.New()
	_, err := uploader.Upload(ctx, &s3.PutObjectInput{
		Bucket:     aws.String(bucketName),
		Key:        aws.String(objectKey),
		Body:       largeBuffer,
		ContentMD5: aws.String(base64.StdEncoding.EncodeToString(hash.Sum(largeObject))),
	}) 

[AAZANOVICH]

Seems like the issue was in incorrect md5 lib usage, the following works:
hash := md5.New()
hash.Write(largeObject)
md5Hash := base64.StdEncoding.EncodeToString(hash.Sum(nil))

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.