The SSH secrets engine previously split the `validPrincipals` field
on comma, then if user templating is enabled, evaluated the
templates on each substring. This meant the identity template was only
ever allowed to return a single principal. There are use cases
where it would be helpful for identity metadata to contain a list
of valid principals and for the identity template to be able to inject
all of those as valid principals.
This change inverts the order of processing. First the template
is evaluated, and then the resulting string is split on commas.
This allows the identity template to return a single comma-separated
string with multiple permitted principals.
There is a potential security implication here, that if a user is
allowed to update their own identity metadata, they may be able to
elevate privileges where previously this was not possible.
Fixes#11038
When requesting a SSH certificate with default_extension templating
enabled, if the request lacks entity information and a particular
extension requires templating, just these extensions will be elided.
Other extensions (if present) will still be on the final certificate.
Add a warning in the event of missing entity information and at least
one extension that was skipped as a result.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* impr(ssh): fix bug with allowed_users_template and add allowed_domains_template field in SSH role configuration, closes#10943
* chore: add changelog entry
* ssh: Fix template regex test for defaultExtensions
- The regex to identify if our defaultExtensions contains a template was
a little too greedy, requiring the entire field to be just the regex. Allow
additional text within the value field to be added
* Add cl
* Handle func
* Update - check if key_type and key_bits are allowed
* Update - fields
* Generating keys based on provided key_type and key_bits
* Returning signed key
* Refactor
* Refactor update to common logic function
* Descriptions
* Tests added
* Suggested changes and tests added and refactored
* Suggested changes and fmt run
* File refactoring
* Changelog file
* Update changelog/15561.txt
Co-authored-by: Alexander Scheel <alexander.m.scheel@gmail.com>
* Suggested changes - consistent returns and additional info to test messages
* ssh issue key pair documentation
Co-authored-by: Alexander Scheel <alexander.m.scheel@gmail.com>
