does S3 signed url (for put request) support Content-MD5 header?

Question

Hi,
I tried to create a Signed URL and upload text file to it with Content-MD5 header.
but the response shows "There were headers present in the request which were not signed".
I am using C# SDK. I could not find the options  adding  Content-MD5 header to signed URL.

is this meant that the pre-signed URL does not support content-MD5?

BR

Accepted Answer

have you checked these documentations?
https://docs.aws.amazon.com/AmazonS3/latest/API/API_UploadPart.html
https://aws.amazon.com/premiumsupport/knowledge-center/data-integrity-s3/#:~:text=Note%3A%20When%20you%20use%20the,match%2C%20you%20receive%20an%20error.&text=Verify%20the%20integrity%20of%20the%20uploaded%20object%20by%20passing%20the,header%20during%20the%20object%20upload.

Answer

I do not know why, but SDK for .NET does not have MD5 Option. [TGetPreSignedUrlRequest](https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/S3/TGetPreSignedUrlRequest.html).  
On the other hand, SDK for Java has this Option. [with MD5](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/model/GeneratePresignedUrlRequest.html#withContentMd5-java.lang.String-).   Therefore, it is possible to use Content-MD5 with pre signed URL, i think.

does S3 signed url (for put request) support Content-MD5 header?

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