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73ecb48232
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. |
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| .. | ||
| helpers.go | ||
| integration.go | ||
| integration_test.go | ||
| kube_integration_test.go | ||