[v16] Backport Secrets scanner (#44799)

* Add the device assertion protos (#43804)

* Add the device assertion protos

* Update generated protos

* Add a client-side API to assert devices (#43890)

* Add a client-side API to assert devices

* Add a godoc to authnStreamAdapter

* Define server-side device assertion interfaces (#44036)

* Define server-side device assertion interfaces

* Update proto comments

* Update generated protos

* [sec_scan][1] Add `teleport.access_graph.v1.SecretsScannerService` (#43462)

This PR introduces the `teleport.access_graph.v1.SecretsScannerService`that will be used by Teleport SSH nodes to report `authorized_keys` and user's laptops to report secrets found on them.

The `ReportAuthorizedKeys` uses node's TLS certs signed by HostCA for authentication while `ReportSecrets` leverages the device trust credentials (requires that the device is enrolled) to report secrets without requiring valid user credentials.

handle Alan's feedback

* [sec_scan][2] expose `ssh_scan_enabled` in `AccessGraphConfig` response (#43467)

This PR exposes the configuration for nodes to be aware that they should report SSH Authorized keys to Teleport.

Part of gravitational/access-graph#637

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][3] add `PrivateKey`, `AuthorizedKey` and `Device` to Access Graph resources (#43468)

This PR extends the Access Graph resources to be able include the newly added `teleport.access_graph.v1.PrivateKey`,
`teleport.access_graph.v1.AuthorizedKey` and existing device trust information `teleport.devicetrust.v1.Device`.

Part of gravitational/access-graph#637

Signed-off-by: Tiago Silva <[email protected]>

* fix: fix `nextKey` values when using multiple prefixes (#43486)

This PR makes `generic.Service` correctly implementing `List*` functions when multiple key prefixes are defined

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][5] add secrets backend service (#43543)

* [sec_scan][5] add secrets backend service

This PR implements the backend service to support storing `authorized_keys` and `private_keys` into Teleport backend.

Part of gravitational/access-graph#637

Signed-off-by: Tiago Silva <[email protected]>

* handle feedback

* handle nits

---------

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][6] add device events (#43905)

This PR adds the ability to watch for events for `*devicepb.Device` objects.

Backend storage representation of  `devicepb.Device` is achieved using an internal representation that lives in `e/lib/devicetrust/storage` and whose logic is internal to the package.

To be able to expose the unmarshal logic necessary for events to work, this PR exposes a registration hook that `e/lib/devicetrust/storage` function must call during initialization to register the unmarshal function.

Part of gravitational/access-graph#637

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][7] add authorizedKeys and privateKeys events support (#43906)

This PR introduces the ability to watch for events related to `accessgraphsecretsv1pb.AuthorizedKey` and
`accessgraphsecretsv1pb.PrivateKey` objects.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][9] add `access_graph_settings` protobuf (#44010)

This PR adds the `clusterconfigpbv1.AccessGraphSettings` resource that will be used to control the secrets scanning definition of Teleport.

This resource will be a singleton and the only goal is to carry some settings related to access graph because on the cloud, users don't have access to fileconf.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][10] add `AccessGraphSettingsUpdate` audit event (#44011)

This PR adds the boilerplate code and proto definition for `AccessGraphSettingsUpdate` audit event.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][11] add `AccessGraphSettings` backend service (#44014)

This PR adds the backend service to be able to create, update and retrieve access graph configurations from Teleport backend.

This PR is part of gravitational/access-graph#637.

* [sec_scan][12] add cache and events support for `AccessGraphSettings` (#44016)

* [sec_scan][12] add cache and events support for `AccessGraphSettings`

This PR adds the cache and events support for the new resource `AccessGraphSettings`.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* add tests

---------

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][13] add `AccessGraphSettings` gRPC implementation (#44021)

This PR introduces the gRPC implementation for the CRUD operations related to `AccessGraphSettings`.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][14] create `AccessGraphSettings` on first auth init (#44032)

* [sec_scan][14] create `AccessGraphSettings` on first auth init

This PR adds a init script that sets `AccessGraphSettings` into Teleport backend when auth first inits and there is no `AccessGraphSettings`.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* remove iterations

---------

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][15] add support for edits to `AccessGraphSettings` via `tctl` (#44055)

This PR allows any cluster admin to edit `access_graph_settings` objects via `tctl`.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][16] add methods to store/retrieve device assertion functions (#44081)

This PR adds methods to store/retrieve functions defined by different teleport services.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][17] add `AssertDevice` to `FakeDeviceService` (#44159)

* [sec_scan][17] add `AssertDevice` to `FakeDeviceService`

This PR introduces a `AssertDevice` logic into `FakeDeviceService` to authenticate devices during unit tests using device trust credentials.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* simplify assert tests

* Update lib/devicetrust/assert/assert_test.go

Co-authored-by: Alan Parra <[email protected]>

---------

Signed-off-by: Tiago Silva <[email protected]>
Co-authored-by: Alan Parra <[email protected]>

* [sec_scan][20] add `ReportSecrets` forwarder to proxy's gRPC insecure server (#44324)

* [sec_scan][20] add `ReportSecrets` forwarder to proxy's gRPC insecure server

This PR implements a `ReportSecrets` forwarder from Proxy server to Auth server.
The goal is to allow clients to hit the proxy insecure gRPC server (credentialless)
and proxy will forward requests to the AuthServer on behalf of the client. This is required
because the client doesn't have valid credentials and it wasn't possible for it to reach auth server
via reversetunnel when the cluster uses `separate` mode.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* add comments

* move dial to lib/client/proxy/insecure

---------

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][19] add `tsh scan keys` implementation (#44220)

* [sec_scan][19] add `tsh scan keys` implementation

This PR introduces the required code to transverse a directory(es), finding all the SSH private keys and report them back to the cluster using the device security enclave as authentication mechanism.

This PR is part of gravitational/access-graph#637.

Signed-off-by: Tiago Silva <[email protected]>

* handle code review

* fix message

* handle code review

* fork ssh private keys

* add skip dirs support

* handle code review

---------

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][22] add authorized keys reporter (#44523)

* [sec_scan][22] add authorized keys reporter

This PR introduces a SSH authorized keys reporter that monitors `/etc/passwd` file and all users' authorized_keys files and reports the findings back to teleport.

Part of gravitational/access-graph#637

Signed-off-by: Tiago Silva <[email protected]>

* handle comments

* handle comments

---------

Signed-off-by: Tiago Silva <[email protected]>

* [sec_scan][24] extract AuthorizedKey's comment and type (#44643)

This PR adds ability to extract the comment and key type from AuthorizedKeys files.

Signed-off-by: Tiago Silva <[email protected]>

* fix api module

* [sec_scan][27] add support for LDAP users and macOS (#45109)

* [sec_scan][27] add support for LDAP users and macOS

This PR extends support for authorized keys report for users managed by LDAP system and macOS targets.

It leverages `getpwent` to read the system database files and retrieve the user properties.
It doesn't use the `getpwent_r` because it's not available in macOS and because it's not (yet) standerdized

>   PLEASE NOTE: the `getpwent_r' function is not (yet) standardized.
>   The interface may change in later versions of this library.  But
>   the interface is designed following the principals used for the
>   other reentrant functions so the chances are good this is what the
>   POSIX people would choose.

Part of gravitational/access-graph#637

* handle comments

* handle comments 2

* add comment

---------

Signed-off-by: Tiago Silva <[email protected]>
Co-authored-by: Alan Parra <[email protected]>

api/client/events.go

@@ -19,6 +19,7 @@ import (
 
 	"github.com/gravitational/teleport/api/client/proto"
 	accessmonitoringrulesv1 "github.com/gravitational/teleport/api/gen/proto/go/teleport/accessmonitoringrules/v1"
+	clusterconfigpb "github.com/gravitational/teleport/api/gen/proto/go/teleport/clusterconfig/v1"
 	crownjewelv1 "github.com/gravitational/teleport/api/gen/proto/go/teleport/crownjewel/v1"
 	dbobjectv1 "github.com/gravitational/teleport/api/gen/proto/go/teleport/dbobject/v1"
 	kubewaitingcontainerpb "github.com/gravitational/teleport/api/gen/proto/go/teleport/kubewaitingcontainer/v1"
@@ -80,6 +81,10 @@ func EventToGRPC(in types.Event) (*proto.Event, error) {
 			out.Resource = &proto.Event_DatabaseObject{
 				DatabaseObject: r,
 			}
+		case *clusterconfigpb.AccessGraphSettings:
+			out.Resource = &proto.Event_AccessGraphSettings{
+				AccessGraphSettings: r,
+			}
 		default:
 			return nil, trace.BadParameter("resource type %T is not supported", r)
 		}
@@ -511,6 +516,9 @@ func EventFromGRPC(in *proto.Event) (*types.Event, error) {
 	} else if r := in.GetDatabaseObject(); r != nil {
 		out.Resource = types.Resource153ToLegacy(r)
 		return &out, nil
+	} else if r := in.GetAccessGraphSettings(); r != nil {
+		out.Resource = types.Resource153ToLegacy(r)
+		return &out, nil
 	} else {
 		return nil, trace.BadParameter("received unsupported resource %T", in.Resource)
 	}