agent/consul: Intention.Get ACLs

This commit is contained in:
Mitchell Hashimoto 2018-03-04 11:53:52 -08:00
parent fd840da97a
commit db44a98a2d
No known key found for this signature in database
GPG key ID: 744E147AA52F5B0A
3 changed files with 130 additions and 1 deletions

View file

@ -454,6 +454,33 @@ func (f *aclFilter) filterCoordinates(coords *structs.Coordinates) {
*coords = c
}
// filterIntentions is used to filter intentions based on ACL rules.
// We prune entries the user doesn't have access to, and we redact any tokens
// if the user doesn't have a management token.
func (f *aclFilter) filterIntentions(ixns *structs.Intentions) {
// Management tokens can see everything with no filtering.
if f.acl.ACLList() {
return
}
// Otherwise, we need to see what the token has access to.
ret := make(structs.Intentions, 0, len(*ixns))
for _, ixn := range *ixns {
// If no prefix ACL applies to this then filter it, since
// we know at this point the user doesn't have a management
// token, otherwise see what the policy says.
prefix, ok := ixn.GetACLPrefix()
if !ok || !f.acl.IntentionRead(prefix) {
f.logger.Printf("[DEBUG] consul: dropping intention %q from result due to ACLs", ixn.ID)
continue
}
ret = append(ret, ixn)
}
*ixns = ret
}
// filterNodeDump is used to filter through all parts of a node dump and
// remove elements the provided ACL token cannot access.
func (f *aclFilter) filterNodeDump(dump *structs.NodeDump) {
@ -598,6 +625,9 @@ func (s *Server) filterACL(token string, subj interface{}) error {
case *structs.IndexedHealthChecks:
filt.filterHealthChecks(&v.HealthChecks)
case *structs.IndexedIntentions:
filt.filterIntentions(&v.Intentions)
case *structs.IndexedNodeDump:
filt.filterNodeDump(&v.Dump)

View file

@ -168,7 +168,16 @@ func (s *Intention) Get(
reply.Index = index
reply.Intentions = structs.Intentions{ixn}
// TODO: acl filtering
// Filter
if err := s.srv.filterACL(args.Token, reply); err != nil {
return err
}
// If ACLs prevented any responses, error
if len(reply.Intentions) == 0 {
s.srv.logger.Printf("[WARN] consul.intention: Request to get intention '%s' denied due to ACLs", args.IntentionID)
return acl.ErrPermissionDenied
}
return nil
},

View file

@ -654,6 +654,96 @@ service "foo" {
}
}
// Test reading with ACLs
func TestIntentionGet_acl(t *testing.T) {
t.Parallel()
dir1, s1 := testServerWithConfig(t, func(c *Config) {
c.ACLDatacenter = "dc1"
c.ACLMasterToken = "root"
c.ACLDefaultPolicy = "deny"
})
defer os.RemoveAll(dir1)
defer s1.Shutdown()
codec := rpcClient(t, s1)
defer codec.Close()
testrpc.WaitForLeader(t, s1.RPC, "dc1")
// Create an ACL with service write permissions. This will grant
// intentions read.
var token string
{
var rules = `
service "foo" {
policy = "write"
}`
req := structs.ACLRequest{
Datacenter: "dc1",
Op: structs.ACLSet,
ACL: structs.ACL{
Name: "User token",
Type: structs.ACLTypeClient,
Rules: rules,
},
WriteRequest: structs.WriteRequest{Token: "root"},
}
if err := msgpackrpc.CallWithCodec(codec, "ACL.Apply", &req, &token); err != nil {
t.Fatalf("err: %v", err)
}
}
// Setup a basic record to create
ixn := structs.IntentionRequest{
Datacenter: "dc1",
Op: structs.IntentionOpCreate,
Intention: structs.TestIntention(t),
}
ixn.Intention.DestinationName = "foobar"
ixn.WriteRequest.Token = "root"
// Create
var reply string
if err := msgpackrpc.CallWithCodec(codec, "Intention.Apply", &ixn, &reply); err != nil {
t.Fatalf("err: %v", err)
}
ixn.Intention.ID = reply
// Read without token should be error
{
req := &structs.IntentionQueryRequest{
Datacenter: "dc1",
IntentionID: ixn.Intention.ID,
}
var resp structs.IndexedIntentions
err := msgpackrpc.CallWithCodec(codec, "Intention.Get", req, &resp)
if !acl.IsErrPermissionDenied(err) {
t.Fatalf("bad: %v", err)
}
if len(resp.Intentions) != 0 {
t.Fatalf("bad: %v", resp)
}
}
// Read with token should work
{
req := &structs.IntentionQueryRequest{
Datacenter: "dc1",
IntentionID: ixn.Intention.ID,
QueryOptions: structs.QueryOptions{Token: token},
}
var resp structs.IndexedIntentions
if err := msgpackrpc.CallWithCodec(codec, "Intention.Get", req, &resp); err != nil {
t.Fatalf("err: %v", err)
}
if len(resp.Intentions) != 1 {
t.Fatalf("bad: %v", resp)
}
}
}
func TestIntentionList(t *testing.T) {
t.Parallel()