AWSSDK.S3 causes x-amz-content-sha256 error against minio

Question

I'm using the AWSSDK.S3 for .NET (v4.0.9.1) in my app. For my tests I run minio in a docker container. I know this worked in the past but with an update to the current versions of the SDK and the docker image I get this exception

Amazon.S3.AmazonS3Exception: The provided 'x-amz-content-sha256' header does not match what was computed.

when I try to upload a file via one of the extension methods from the SDK

IAmazonS3 s3 = ...;
await s3.UploadObjectFromStreamAsync(
    bucketName,
    objectKey,
    stream,
    new Dictionary<string, object>(),
    cancellationToken);

I tried to turn off the checksum validation via the AmazonS3Config but that did not solve the problem.

Any ideas what I'm missing? Since this is for tests only I don't care all that much if a solution is potentially "dangerous" and should not be applied in production code.

Geoff Langenderfer · Accepted Answer · 2025-11-07 19:51:41Z

0

you can disable new Sigv4 signing:

using Amazon;
using Amazon.Runtime;
using Amazon.S3;

var request = new PutObjectRequest
{
    FilePath = @"/path/file.txt",
    BucketName = "theBucket",
    DisablePayloadSigning = true,           // sigv4 is introduced in the new s3 sdk
    DisableDefaultChecksumValidation = true // need to disable it until you migrate
};

var response = await s3Client.PutObjectAsync(request);

Console.WriteLine("ETag: {0}", response.ETag);

https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html

answered Nov 7 at 19:51

Geoff Langenderfer

9402 gold badges11 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Sebastian Weber Nov 10 at 5:58

Unfortunately that would require HTTPS Amazon.Runtime.AmazonClientException: When DisablePayloadSigning is true, the request must be sent over HTTPS.

Collectives™ on Stack Overflow

AWSSDK.S3 causes x-amz-content-sha256 error against minio

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related