Example of a AWS4 canonical request & string-to-sign

This canonical request has been extracted via boto3 source code modification.

HEAD
/my-bucket/folder/example-object.txt

host:minio.mydomain.com
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
x-amz-date:20230608T220550Z

host;x-amz-content-sha256;x-amz-date
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

The corresponding string-to-sign is

AWS4-HMAC-SHA256
20230608T220550Z
20230608/us-east-1/s3/aws4_request
e2d4be537009ba634ecc7a2717df2d74e612c63d31cf4bd8cb94eaf43be3665b

Note that the checksum of the string-to-sign does not match since some details of the canonical request have been modified.