Issue #41 Fix value of 'algorithm' field when signing algorithm is set to 'hs2019'

[sebastien-rosset]

This is a fix for #41.

When the signing algorithm is set to 'hs2019', the value of the 'algorithm' field in the Authorization header must be set to hs2019. Previously it was set to the actual cryptographic algorithm, such as rsa-sha256. When the signing algorithm is something other than 'hs2019', the value of the 'algorithm' field remains as it was before.

Example:

Signature keyId="my-key",algorithm="hs2019",\
headers="(request-target) host date digest content-length", \
signature="q2ctRkTYo6RRi7Tb7+C6nfYFRV+P2mw5ykEEdB0vQlcqF4pXqnWKjGI3ZBkrb7qKDxEE/zvrZKDsY3WUAS+UFvinhEwZUap4W3Xi4xwm4R7Wd9Gzm4l6SJf7I+UqhW0FjlH9i1/c+xpLFOY0puw1XIdVOBKS3UqxOpeY/0qdlkM="

versus:

Signature keyId="my-key",algorithm="rsa-sh256",\
headers="(request-target) host date digest content-length",\
signature="q2ctRkTYo6RRi7Tb7+C6nfYFRV+P2mw5ykEEdB0vQlcqF4pXqnWKjGI3ZBkrb7qKDxEE/zvrZKDsY3WUAS+UFvinhEwZUap4W3Xi4xwm4R7Wd9Gzm4l6SJf7I+UqhW0FjlH9i1/c+xpLFOY0puw1XIdVOBKS3UqxOpeY/0qdlkM="

[jeanouii]

This is a bug and needs to go in the release notes, so ticket is required here in my opinion. Can you do that?

[sebastien-rosset]

This is a bug and needs to go in the release notes, so ticket is required here in my opinion. Can you do that?

I have created #41.

[sebastien-rosset]

This is a bug and needs to go in the release notes, so ticket is required here in my opinion. Can you do that?

@jeanouii , is there anything else you need before these three PRs can be merged?