5183082-big.jpeg?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAY55CGH2VECWAZGTW/20240308/eu-west-1/s3/

How AWS S3 Requests Are Authenticated: HMAC-SHA256, by Shekhar

x-amz-content-sha256 and content-md5 header value does not match the data sometimes when using UploadPart · Issue #2900 · aws/aws-sdk-go · GitHub

Missing required header for this request: x-amz-content-sha256 · Issue #2138 · aws/aws-cli · GitHub

Requests are unsigned since x-amz-content-sha256 is not part of the canonical headers · Issue #362 · cloudyr/aws.s3 · GitHub

EC2_Examples/AWS_EC2_Example2/src/main/java/com/aws/ec2/AWSSignatureV4Generator.java at master · Biruntha/EC2_Examples · GitHub

web services - Postman with AWS signature: Missing x-amz-target Header - Stack Overflow

X-amz-content-sha256 - 🙋 Help - Postman Community

web services - AWS Upload file to S3 REST API - Missing required header for this request: x-amz-content-sha256 - Stack Overflow

Support `STREAMING-AWS4-HMAC-SHA256-PAYLOAD` · Issue #3954 · aws/aws-sdk-js-v3 · GitHub

web services - There were headers present in the request which were not signed - Stack Overflow

HMAC-SHA Signature - SimpleDB