consul/agent/structs/config_entry_mesh.go

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package structs
import (
"encoding/json"
"fmt"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/consul/types"
)
type MeshConfigEntry struct {
// TransparentProxy contains cluster-wide options pertaining to TPROXY mode
// when enabled.
TransparentProxy TransparentProxyMeshConfig `alias:"transparent_proxy"`
TLS *MeshTLSConfig `json:",omitempty"`
Meta map[string]string `json:",omitempty"`
EnterpriseMeta `hcl:",squash" mapstructure:",squash"`
RaftIndex
}
// TransparentProxyMeshConfig contains cluster-wide options pertaining to
// TPROXY mode when enabled.
type TransparentProxyMeshConfig struct {
// MeshDestinationsOnly can be used to disable the pass-through that
// allows traffic to destinations outside of the mesh.
MeshDestinationsOnly bool `alias:"mesh_destinations_only"`
}
type MeshTLSConfig struct {
Incoming *MeshDirectionalTLSConfig `json:",omitempty"`
Outgoing *MeshDirectionalTLSConfig `json:",omitempty"`
}
type MeshDirectionalTLSConfig struct {
TLSMinVersion types.TLSVersion `json:",omitempty" alias:"tls_min_version"`
TLSMaxVersion types.TLSVersion `json:",omitempty" alias:"tls_max_version"`
// Define a subset of cipher suites to restrict
// Only applicable to connections negotiated via TLS 1.2 or earlier
CipherSuites []types.TLSCipherSuite `json:",omitempty" alias:"cipher_suites"`
}
func (e *MeshConfigEntry) GetKind() string {
return MeshConfig
}
func (e *MeshConfigEntry) GetName() string {
if e == nil {
return ""
}
return MeshConfigMesh
}
func (e *MeshConfigEntry) GetMeta() map[string]string {
if e == nil {
return nil
}
return e.Meta
}
func (e *MeshConfigEntry) Normalize() error {
if e == nil {
return fmt.Errorf("config entry is nil")
}
e.EnterpriseMeta.Normalize()
return nil
}
func (e *MeshConfigEntry) Validate() error {
if e == nil {
return fmt.Errorf("config entry is nil")
}
if err := validateConfigEntryMeta(e.Meta); err != nil {
return err
}
if e.TLS != nil {
if e.TLS.Incoming != nil {
if err := validateMeshDirectionalTLSConfig(e.TLS.Incoming); err != nil {
return fmt.Errorf("error in incoming TLS configuration: %v", err)
}
}
if e.TLS.Outgoing != nil {
if err := validateMeshDirectionalTLSConfig(e.TLS.Outgoing); err != nil {
return fmt.Errorf("error in outgoing TLS configuration: %v", err)
}
}
}
return e.validateEnterpriseMeta()
}
func (e *MeshConfigEntry) CanRead(authz acl.Authorizer) error {
return nil
}
func (e *MeshConfigEntry) CanWrite(authz acl.Authorizer) error {
var authzContext acl.AuthorizerContext
e.FillAuthzContext(&authzContext)
return authz.ToAllowAuthorizer().MeshWriteAllowed(&authzContext)
}
func (e *MeshConfigEntry) GetRaftIndex() *RaftIndex {
if e == nil {
return &RaftIndex{}
}
return &e.RaftIndex
}
func (e *MeshConfigEntry) GetEnterpriseMeta() *EnterpriseMeta {
if e == nil {
return nil
}
return &e.EnterpriseMeta
}
// MarshalJSON adds the Kind field so that the JSON can be decoded back into the
// correct type.
// This method is implemented on the structs type (as apposed to the api type)
// because that is what the API currently uses to return a response.
func (e *MeshConfigEntry) MarshalJSON() ([]byte, error) {
type Alias MeshConfigEntry
source := &struct {
Kind string
*Alias
}{
Kind: MeshConfig,
Alias: (*Alias)(e),
}
return json.Marshal(source)
}
func validateMeshDirectionalTLSConfig(cfg *MeshDirectionalTLSConfig) error {
if cfg == nil {
return nil
}
return validateTLSConfig(cfg.TLSMinVersion, cfg.TLSMaxVersion, cfg.CipherSuites)
}
func validateTLSConfig(
tlsMinVersion types.TLSVersion,
tlsMaxVersion types.TLSVersion,
cipherSuites []types.TLSCipherSuite,
) error {
if tlsMinVersion != types.TLSVersionUnspecified {
if err := types.ValidateTLSVersion(tlsMinVersion); err != nil {
return err
}
}
if tlsMaxVersion != types.TLSVersionUnspecified {
if err := types.ValidateTLSVersion(tlsMaxVersion); err != nil {
return err
}
if tlsMinVersion != types.TLSVersionUnspecified {
if err, maxLessThanMin := tlsMaxVersion.LessThan(tlsMinVersion); err == nil && maxLessThanMin {
return fmt.Errorf("configuring max version %s less than the configured min version %s is invalid", tlsMaxVersion, tlsMinVersion)
}
}
}
if len(cipherSuites) != 0 {
if _, ok := types.TLSVersionsWithConfigurableCipherSuites[tlsMinVersion]; !ok {
return fmt.Errorf("configuring CipherSuites is only applicable to connections negotiated with TLS 1.2 or earlier, TLSMinVersion is set to %s", tlsMinVersion)
}
// NOTE: it would be nice to emit a warning but not return an error from
// here if TLSMaxVersion is unspecified, TLS_AUTO or TLSv1_3
if err := types.ValidateEnvoyCipherSuites(cipherSuites); err != nil {
return err
}
}
return nil
}