Masked OAuth bearer tokens in credential trace output by emitting ***
when a bearer token is present, matching the existing password redaction
behavior and preventing sensitive token disclosure in verbose/debug
logs.
Closes#21659
The SASL service name, used in authentication, is part of curl's credentials
when authenticating to a server/proxy. Make it part of `struct Curl_creds`.
Change code to use `creds` to obtain a service name. By tying creds used
to the connection, connection reuse is also only allowed when the service
name matches.
Closes#21585
Authorizdation credentials are kept in `struct Curl_creds`. This contains:
* `user`: the username, maybe the empty string
* `passwd`: the password, maybe the empty string
* `sasl_authzid`: the SASL authz value, maybe the empty string
* `oauth_bearer`: the OAUTH bearer token, maybe the empty string
* `source`: where the credentials from from
* `refcount`: a reference counter to link/unkink creds
A `creds` with all values empty is equivalent to NULL, e.g. no `creds`
instance. With reference counting, `creds` can be linked/unlinked
in several places.
See docs/internals/CREDENTIALS.md for use.
Closes#21548
