277 lines
9.0 KiB
Go
277 lines
9.0 KiB
Go
package consul
|
|
|
|
import (
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/hashicorp/consul/acl"
|
|
"github.com/hashicorp/consul/agent/structs"
|
|
"github.com/hashicorp/consul/lib/serf"
|
|
)
|
|
|
|
var serverACLCacheConfig *structs.ACLCachesConfig = &structs.ACLCachesConfig{
|
|
// The server's ACL caching has a few underlying assumptions:
|
|
//
|
|
// 1 - All policies can be resolved locally. Hence we do not cache any
|
|
// unparsed policies/roles as we have memdb for that.
|
|
// 2 - While there could be many identities being used within a DC the
|
|
// number of distinct policies and combined multi-policy authorizers
|
|
// will be much less.
|
|
// 3 - If you need more than 10k tokens cached then you should probably
|
|
// enable token replication or be using DC local tokens. In both
|
|
// cases resolving the tokens from memdb will avoid the cache
|
|
// entirely
|
|
//
|
|
Identities: 10 * 1024,
|
|
Policies: 0,
|
|
ParsedPolicies: 512,
|
|
Authorizers: 1024,
|
|
Roles: 0,
|
|
}
|
|
|
|
func (s *Server) checkTokenUUID(id string) (bool, error) {
|
|
state := s.fsm.State()
|
|
|
|
// We won't check expiration times here. If we generate a UUID that matches
|
|
// a token that hasn't been reaped yet, then we won't be able to insert the
|
|
// new token due to a collision.
|
|
|
|
if _, token, err := state.ACLTokenGetByAccessor(nil, id, nil); err != nil {
|
|
return false, err
|
|
} else if token != nil {
|
|
return false, nil
|
|
}
|
|
|
|
if _, token, err := state.ACLTokenGetBySecret(nil, id, nil); err != nil {
|
|
return false, err
|
|
} else if token != nil {
|
|
return false, nil
|
|
}
|
|
|
|
return !structs.ACLIDReserved(id), nil
|
|
}
|
|
|
|
func (s *Server) checkPolicyUUID(id string) (bool, error) {
|
|
state := s.fsm.State()
|
|
if _, policy, err := state.ACLPolicyGetByID(nil, id, nil); err != nil {
|
|
return false, err
|
|
} else if policy != nil {
|
|
return false, nil
|
|
}
|
|
|
|
return !structs.ACLIDReserved(id), nil
|
|
}
|
|
|
|
func (s *Server) checkRoleUUID(id string) (bool, error) {
|
|
state := s.fsm.State()
|
|
if _, role, err := state.ACLRoleGetByID(nil, id, nil); err != nil {
|
|
return false, err
|
|
} else if role != nil {
|
|
return false, nil
|
|
}
|
|
|
|
return !structs.ACLIDReserved(id), nil
|
|
}
|
|
|
|
func (s *Server) checkBindingRuleUUID(id string) (bool, error) {
|
|
state := s.fsm.State()
|
|
if _, rule, err := state.ACLBindingRuleGetByID(nil, id, nil); err != nil {
|
|
return false, err
|
|
} else if rule != nil {
|
|
return false, nil
|
|
}
|
|
|
|
return !structs.ACLIDReserved(id), nil
|
|
}
|
|
|
|
func (s *Server) updateSerfTags(key, value string) {
|
|
// Update the LAN serf
|
|
serf.UpdateTag(s.serfLAN, key, value)
|
|
|
|
if s.serfWAN != nil {
|
|
serf.UpdateTag(s.serfWAN, key, value)
|
|
}
|
|
|
|
s.updateEnterpriseSerfTags(key, value)
|
|
}
|
|
|
|
func (s *Server) updateACLAdvertisement() {
|
|
// One thing to note is that once in new ACL mode the server will
|
|
// never transition to legacy ACL mode. This is not currently a
|
|
// supported use case.
|
|
s.updateSerfTags("acls", string(structs.ACLModeEnabled))
|
|
}
|
|
|
|
func (s *Server) canUpgradeToNewACLs(isLeader bool) bool {
|
|
if atomic.LoadInt32(&s.useNewACLs) != 0 {
|
|
// can't upgrade because we are already upgraded
|
|
return false
|
|
}
|
|
|
|
// Check to see if we already upgraded the last time we ran by seeing if we
|
|
// have a copy of any global management policy stored locally. This should
|
|
// always be true because policies always replicate.
|
|
_, mgmtPolicy, err := s.fsm.State().ACLPolicyGetByID(nil, structs.ACLPolicyGlobalManagementID, structs.DefaultEnterpriseMeta())
|
|
if err != nil {
|
|
s.logger.Warn("Failed to get the builtin global-management policy to check for a completed ACL upgrade; skipping this optimization", "error", err)
|
|
} else if mgmtPolicy != nil {
|
|
return true
|
|
}
|
|
|
|
if !s.InACLDatacenter() {
|
|
foundServers, mode, _ := ServersGetACLMode(s, "", s.config.ACLDatacenter)
|
|
if mode != structs.ACLModeEnabled || !foundServers {
|
|
s.logger.Debug("Cannot upgrade to new ACLs, servers in acl datacenter are not yet upgraded", "ACLDatacenter", s.config.ACLDatacenter, "mode", mode, "found", foundServers)
|
|
return false
|
|
}
|
|
}
|
|
|
|
leaderAddr := string(s.raft.Leader())
|
|
foundServers, mode, leaderMode := ServersGetACLMode(s, leaderAddr, s.config.Datacenter)
|
|
if isLeader {
|
|
if mode == structs.ACLModeLegacy {
|
|
return true
|
|
}
|
|
} else {
|
|
if leaderMode == structs.ACLModeEnabled {
|
|
return true
|
|
}
|
|
}
|
|
|
|
s.logger.Debug("Cannot upgrade to new ACLs", "leaderMode", leaderMode, "mode", mode, "found", foundServers, "leader", leaderAddr)
|
|
return false
|
|
}
|
|
|
|
func (s *Server) InACLDatacenter() bool {
|
|
return s.config.ACLDatacenter == "" || s.config.Datacenter == s.config.ACLDatacenter
|
|
}
|
|
|
|
func (s *Server) UseLegacyACLs() bool {
|
|
return atomic.LoadInt32(&s.useNewACLs) == 0
|
|
}
|
|
|
|
func (s *Server) LocalTokensEnabled() bool {
|
|
// in ACL datacenter so local tokens are always enabled
|
|
if s.InACLDatacenter() {
|
|
return true
|
|
}
|
|
|
|
if !s.config.ACLTokenReplication || s.tokens.ReplicationToken() == "" {
|
|
// token replication is off so local tokens are disabled
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func (s *Server) ACLDatacenter(legacy bool) string {
|
|
// For resolution running on servers the only option
|
|
// is to contact the configured ACL Datacenter
|
|
if s.config.ACLDatacenter != "" {
|
|
return s.config.ACLDatacenter
|
|
}
|
|
|
|
// This function only gets called if ACLs are enabled.
|
|
// When no ACL DC is set then it is assumed that this DC
|
|
// is the primary DC
|
|
return s.config.Datacenter
|
|
}
|
|
|
|
// ResolveIdentityFromToken retrieves a token's full identity given its secretID.
|
|
func (s *Server) ResolveIdentityFromToken(token string) (bool, structs.ACLIdentity, error) {
|
|
// only allow remote RPC resolution when token replication is off and
|
|
// when not in the ACL datacenter
|
|
if !s.InACLDatacenter() && !s.config.ACLTokenReplication {
|
|
return false, nil, nil
|
|
}
|
|
|
|
index, aclToken, err := s.fsm.State().ACLTokenGetBySecret(nil, token, nil)
|
|
if err != nil {
|
|
return true, nil, err
|
|
} else if aclToken != nil && !aclToken.IsExpired(time.Now()) {
|
|
return true, aclToken, nil
|
|
}
|
|
|
|
return s.InACLDatacenter() || index > 0, nil, acl.ErrNotFound
|
|
}
|
|
|
|
func (s *Server) ResolvePolicyFromID(policyID string) (bool, *structs.ACLPolicy, error) {
|
|
index, policy, err := s.fsm.State().ACLPolicyGetByID(nil, policyID, nil)
|
|
if err != nil {
|
|
return true, nil, err
|
|
} else if policy != nil {
|
|
return true, policy, nil
|
|
}
|
|
|
|
// If the max index of the policies table is non-zero then we have acls, until then
|
|
// we may need to allow remote resolution. This is particularly useful to allow updating
|
|
// the replication token via the API in a non-primary dc.
|
|
return s.InACLDatacenter() || index > 0, policy, acl.ErrNotFound
|
|
}
|
|
|
|
func (s *Server) ResolveRoleFromID(roleID string) (bool, *structs.ACLRole, error) {
|
|
index, role, err := s.fsm.State().ACLRoleGetByID(nil, roleID, nil)
|
|
if err != nil {
|
|
return true, nil, err
|
|
} else if role != nil {
|
|
return true, role, nil
|
|
}
|
|
|
|
// If the max index of the roles table is non-zero then we have acls, until then
|
|
// we may need to allow remote resolution. This is particularly useful to allow updating
|
|
// the replication token via the API in a non-primary dc.
|
|
return s.InACLDatacenter() || index > 0, role, acl.ErrNotFound
|
|
}
|
|
|
|
func (s *Server) ResolveToken(token string) (acl.Authorizer, error) {
|
|
_, authz, err := s.ResolveTokenToIdentityAndAuthorizer(token)
|
|
return authz, err
|
|
}
|
|
|
|
func (s *Server) ResolveTokenToIdentity(token string) (structs.ACLIdentity, error) {
|
|
// not using ResolveTokenToIdentityAndAuthorizer because in this case we don't
|
|
// need to resolve the roles, policies and namespace but just want the identity
|
|
// information such as accessor id.
|
|
return s.acls.ResolveTokenToIdentity(token)
|
|
}
|
|
|
|
func (s *Server) ResolveTokenToIdentityAndAuthorizer(token string) (structs.ACLIdentity, acl.Authorizer, error) {
|
|
return s.acls.ResolveTokenToIdentityAndAuthorizer(token)
|
|
}
|
|
|
|
// ResolveTokenIdentityAndDefaultMeta retrieves an identity and authorizer for the caller,
|
|
// and populates the EnterpriseMeta based on the AuthorizerContext.
|
|
func (s *Server) ResolveTokenIdentityAndDefaultMeta(token string, entMeta *structs.EnterpriseMeta, authzContext *acl.AuthorizerContext) (structs.ACLIdentity, acl.Authorizer, error) {
|
|
identity, authz, err := s.ResolveTokenToIdentityAndAuthorizer(token)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
// Default the EnterpriseMeta based on the Tokens meta or actual defaults
|
|
// in the case of unknown identity
|
|
if identity != nil {
|
|
entMeta.Merge(identity.EnterpriseMetadata())
|
|
} else {
|
|
entMeta.Merge(structs.DefaultEnterpriseMeta())
|
|
}
|
|
|
|
// Use the meta to fill in the ACL authorization context
|
|
entMeta.FillAuthzContext(authzContext)
|
|
|
|
return identity, authz, err
|
|
}
|
|
|
|
// ResolveTokenAndDefaultMeta passes through to ResolveTokenIdentityAndDefaultMeta, eliding the identity from its response.
|
|
func (s *Server) ResolveTokenAndDefaultMeta(token string, entMeta *structs.EnterpriseMeta, authzContext *acl.AuthorizerContext) (acl.Authorizer, error) {
|
|
_, authz, err := s.ResolveTokenIdentityAndDefaultMeta(token, entMeta, authzContext)
|
|
return authz, err
|
|
}
|
|
|
|
func (s *Server) filterACL(token string, subj interface{}) error {
|
|
return s.acls.filterACL(token, subj)
|
|
}
|
|
|
|
func (s *Server) filterACLWithAuthorizer(authorizer acl.Authorizer, subj interface{}) error {
|
|
return s.acls.filterACLWithAuthorizer(authorizer, subj)
|
|
}
|