* update genUsername to cap STS usernames at 64 chars
* add changelog
* refactor tests into t.Run block
* patch: remove warningExpected bool and include expected string
* patch: revert sts to cap at 32 chars and add assume_role case in genUsername
* update changelog
* update genUsername to return error if username generated exceeds length limits
* update changelog
* add conditional default username template to provide custom STS usernames
* update changelog
* include test for failing STS length case
* update comments for more clarity
* add ability to customize IAM usernames based on templates
* add changelog
* remove unnecessary logs
* patch: add test for readConfig
* patch: add default STS Template
* patch: remove unnecessary if cases
* patch: add regex checks in username test
* patch: update genUsername to return an error instead of warnings
* patch: separate tests for default and custom templates
* patch: return truncate warning from genUsername and trigger a 400 response on errors
* patch: truncate midString to 42 chars in default template
* docs: add new username_template field to aws docs
* Add AWS Secret Engine Root Credential Rotation
This allows the AWS Secret Engine to rotate its credentials used to
access AWS. This will only work when the AWS Secret Engine has been
provided explicit IAM credentials via the config/root endpoint, and
further, when the IAM credentials provided are the only access key on
the IAM user associated wtih the access key (because AWS allows a
maximum of 2 access keys per user).
Fixes#4385
* Add test for AWS root credential rotation
Also fix a typo in the root credential rotation code
* Add docs for AWS root rotation
* Add locks around reading and writing config/root
And wire the backend up in a bunch of places so the config can get the
lock
* Respond to PR feedback
* Fix casing in error messages
* Fix merge errors
* Fix locking bugs
* Initial implemntation of returning 529 for rate limits
- bump aws iam and sts packages to v1.14.31 to get mocking interface
- promote the iam and sts clients to the aws backend struct, for mocking in tests
- this also promotes some functions to methods on the Backend struct, so
that we can use the injected client
Generating creds requires reading config/root for credentials to contact
IAM. Here we make pathConfigRoot a method on aws/backend so we can clear
the clients on successful update of config/root path. Adds a mutex to
safely clear the clients
* refactor locking and unlocking into methods on *backend
* refactor/simply the locking
* check client after grabbing lock
* Start work on passing context to backends
* More work on passing context
* Unindent logical system
* Unindent token store
* Unindent passthrough
* Unindent cubbyhole
* Fix tests
* use requestContext in rollback and expiration managers
