* Update AccessList Entitlement Enforcement to handle infinite limit
The AccessList service was not correctly handling a zero-value limit
(i.e. an infinite limit) when checking to see if creating an
AccessList would breach the cluster Access List entitlement.
This patch:
* Adds a centralized implementation of a limit check, so that we
only have to get the calculation right once.
* Tests for same
* Updates the AccessList limit check to use the new limit check
* Adds table-driven tests to exercise the limit check in various
scenarios, replacing several almost identical tests.
* Review feedback
* dont allow disabling second factor
* update docs for 2fa change
* add environmental variable to work around disabled 2fa
* check if its cloud
* update todos
* add a test
* introduce insecure test mode
* fixes for tests
Implements RFD #7https://github.com/gravitational/teleport/blob/master/rfd/0007-rbac-oss.md
OSS users can use roles. Some FedRamp related role options
are limited to enterprise.
All users are migrated to a new role "ossuser".
This role is a limited access role downgrading all users
from OSS role "admin".
All trusted clusters are mapped to "ossuser" as well.
Github connector maps teams to generated roles.
For transition period, format `tctl users add alice` works
alongside with `tctl users add alice --roles=admin`, but prints
a warning.
With OSS version and without using the github connector (only local
auth), logged in user won't have any `kubernetes_groups`. Without
usernames too, user can login but can't use kubectl.
This commit fixes#3369, refs #3374
It adds support for kuberenetes_users section in roles,
allowing Teleport proxy to impersonate user identities.
It also extends variable interpolation syntax by adding
suffix and prefix to variables and function `email.local`:
Example:
```yaml
kind: role
version: v3
metadata:
name: admin
spec:
allow:
# extract email local part from the email claim
logins: ['{{email.local(external.email)}}']
# impersonate a kubernetes user with IAM prefix
kubernetes_users: ['IAM#{{external.email}}']
# the deny section uses the identical format as the 'allow' section.
# the deny rules always override allow rules.
deny: {}
```
Some notes on email.local behavior:
* This is the only function supported in the template variables for now
* In case if the email.local will encounter invalid email address,
it will interpolate to empty value, will be removed from resulting
output.
Changes in impersonation behavior:
* By default, if no kubernetes_users is set, which is a majority of cases,
user will impersonate themselves, which is the backwards-compatible behavior.
* As long as at least one `kubernetes_users` is set, the forwarder will start
limiting the list of users allowed by the client to impersonate.
* If the users' role set does not include actual user name, it will be rejected,
otherwise there will be no way to exclude the user from the list).
* If the `kuberentes_users` role set includes only one user
(quite frequently that's the real intent), teleport will default to it,
otherwise it will refuse to select.
This will enable the use case when `kubernetes_users` has just one field to
link the user identity with the IAM role, for example `IAM#{{external.email}}`
* Previous versions of the forwarding proxy were denying all external
impersonation headers, this commit allows 'Impesrsonate-User' and
'Impersonate-Group' header values that are allowed by role set.
* Previous versions of the forwarding proxy ignored 'Deny' section of the roles
when applied to impersonation, this commit fixes that - roles with deny
kubernetes_users and kubernetes_groups section will not allow
impersonation of those users and groups.
Added "--fips" flag to "teleport start" command which can start
Enterprise in FedRAMP/FIPS 140-2 mode.
In FIPS mode, Teleport configures the TLS and SSH servers with FIPS
compliant cryptographic algorithms. In FIPS mode, if non-compliant
algorithms are chosen, Teleport will fail to start. In addition,
Teleport checks if the binary was compiled against an approved
cryptographic module (BoringCrypto) and fails to start if it was not.
If a client, like tsh, tries to use non-FIPS encryption, like NaCl,
those requests are also rejected.
Michelle Bergquist