feat: add external authorization service (authzd) with JWT authentication

- Add new authzd gRPC service implementing Envoy's external authorization API
- Integrate JWT authentication filter in Envoy configuration with claim extraction
- Update middleware to support both cookie-based and header-based user authentication
- Add comprehensive test coverage for authorization service and server
- Configure proper service orchestration with authzd, sparkled, and Envoy
- Update build system and Docker configuration for multi-service deployment
- Add grpcurl tool for gRPC service debugging and testing

This enables fine-grained authorization control through Envoy's ext_authz filter
while maintaining backward compatibility with existing cookie-based authentication.

1 files changed, 490 insertions, 0 deletions

diff --git a/vendor/cel.dev/expr/eval.pb.go b/vendor/cel.dev/expr/eval.pb.go
new file mode 100644
index 0000000..8f651f9
--- /dev/null
+++ b/vendor/cel.dev/expr/eval.pb.go
@@ -0,0 +1,490 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.1
+// 	protoc        v3.21.5
+// source: cel/expr/eval.proto
+
+package expr
+
+import (
+	status "google.golang.org/genproto/googleapis/rpc/status"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type EvalState struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Values  []*ExprValue        `protobuf:"bytes,1,rep,name=values,proto3" json:"values,omitempty"`
+	Results []*EvalState_Result `protobuf:"bytes,3,rep,name=results,proto3" json:"results,omitempty"`
+}
+
+func (x *EvalState) Reset() {
+	*x = EvalState{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cel_expr_eval_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EvalState) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EvalState) ProtoMessage() {}
+
+func (x *EvalState) ProtoReflect() protoreflect.Message {
+	mi := &file_cel_expr_eval_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EvalState.ProtoReflect.Descriptor instead.
+func (*EvalState) Descriptor() ([]byte, []int) {
+	return file_cel_expr_eval_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *EvalState) GetValues() []*ExprValue {
+	if x != nil {
+		return x.Values
+	}
+	return nil
+}
+
+func (x *EvalState) GetResults() []*EvalState_Result {
+	if x != nil {
+		return x.Results
+	}
+	return nil
+}
+
+type ExprValue struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Types that are assignable to Kind:
+	//
+	//	*ExprValue_Value
+	//	*ExprValue_Error
+	//	*ExprValue_Unknown
+	Kind isExprValue_Kind `protobuf_oneof:"kind"`
+}
+
+func (x *ExprValue) Reset() {
+	*x = ExprValue{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cel_expr_eval_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ExprValue) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExprValue) ProtoMessage() {}
+
+func (x *ExprValue) ProtoReflect() protoreflect.Message {
+	mi := &file_cel_expr_eval_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExprValue.ProtoReflect.Descriptor instead.
+func (*ExprValue) Descriptor() ([]byte, []int) {
+	return file_cel_expr_eval_proto_rawDescGZIP(), []int{1}
+}
+
+func (m *ExprValue) GetKind() isExprValue_Kind {
+	if m != nil {
+		return m.Kind
+	}
+	return nil
+}
+
+func (x *ExprValue) GetValue() *Value {
+	if x, ok := x.GetKind().(*ExprValue_Value); ok {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *ExprValue) GetError() *ErrorSet {
+	if x, ok := x.GetKind().(*ExprValue_Error); ok {
+		return x.Error
+	}
+	return nil
+}
+
+func (x *ExprValue) GetUnknown() *UnknownSet {
+	if x, ok := x.GetKind().(*ExprValue_Unknown); ok {
+		return x.Unknown
+	}
+	return nil
+}
+
+type isExprValue_Kind interface {
+	isExprValue_Kind()
+}
+
+type ExprValue_Value struct {
+	Value *Value `protobuf:"bytes,1,opt,name=value,proto3,oneof"`
+}
+
+type ExprValue_Error struct {
+	Error *ErrorSet `protobuf:"bytes,2,opt,name=error,proto3,oneof"`
+}
+
+type ExprValue_Unknown struct {
+	Unknown *UnknownSet `protobuf:"bytes,3,opt,name=unknown,proto3,oneof"`
+}
+
+func (*ExprValue_Value) isExprValue_Kind() {}
+
+func (*ExprValue_Error) isExprValue_Kind() {}
+
+func (*ExprValue_Unknown) isExprValue_Kind() {}
+
+type ErrorSet struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Errors []*status.Status `protobuf:"bytes,1,rep,name=errors,proto3" json:"errors,omitempty"`
+}
+
+func (x *ErrorSet) Reset() {
+	*x = ErrorSet{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cel_expr_eval_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ErrorSet) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ErrorSet) ProtoMessage() {}
+
+func (x *ErrorSet) ProtoReflect() protoreflect.Message {
+	mi := &file_cel_expr_eval_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ErrorSet.ProtoReflect.Descriptor instead.
+func (*ErrorSet) Descriptor() ([]byte, []int) {
+	return file_cel_expr_eval_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *ErrorSet) GetErrors() []*status.Status {
+	if x != nil {
+		return x.Errors
+	}
+	return nil
+}
+
+type UnknownSet struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Exprs []int64 `protobuf:"varint,1,rep,packed,name=exprs,proto3" json:"exprs,omitempty"`
+}
+
+func (x *UnknownSet) Reset() {
+	*x = UnknownSet{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cel_expr_eval_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *UnknownSet) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*UnknownSet) ProtoMessage() {}
+
+func (x *UnknownSet) ProtoReflect() protoreflect.Message {
+	mi := &file_cel_expr_eval_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use UnknownSet.ProtoReflect.Descriptor instead.
+func (*UnknownSet) Descriptor() ([]byte, []int) {
+	return file_cel_expr_eval_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *UnknownSet) GetExprs() []int64 {
+	if x != nil {
+		return x.Exprs
+	}
+	return nil
+}
+
+type EvalState_Result struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Expr  int64 `protobuf:"varint,1,opt,name=expr,proto3" json:"expr,omitempty"`
+	Value int64 `protobuf:"varint,2,opt,name=value,proto3" json:"value,omitempty"`
+}
+
+func (x *EvalState_Result) Reset() {
+	*x = EvalState_Result{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cel_expr_eval_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *EvalState_Result) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EvalState_Result) ProtoMessage() {}
+
+func (x *EvalState_Result) ProtoReflect() protoreflect.Message {
+	mi := &file_cel_expr_eval_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EvalState_Result.ProtoReflect.Descriptor instead.
+func (*EvalState_Result) Descriptor() ([]byte, []int) {
+	return file_cel_expr_eval_proto_rawDescGZIP(), []int{0, 0}
+}
+
+func (x *EvalState_Result) GetExpr() int64 {
+	if x != nil {
+		return x.Expr
+	}
+	return 0
+}
+
+func (x *EvalState_Result) GetValue() int64 {
+	if x != nil {
+		return x.Value
+	}
+	return 0
+}
+
+var File_cel_expr_eval_proto protoreflect.FileDescriptor
+
+var file_cel_expr_eval_proto_rawDesc = []byte{
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+	0x64, 0x65, 0x76, 0x2e, 0x63, 0x65, 0x6c, 0x2e, 0x65, 0x78, 0x70, 0x72, 0x42, 0x09, 0x45, 0x76,
+	0x61, 0x6c, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x0c, 0x63, 0x65, 0x6c, 0x2e, 0x64,
+	0x65, 0x76, 0x2f, 0x65, 0x78, 0x70, 0x72, 0xf8, 0x01, 0x01, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
+}
+
+var (
+	file_cel_expr_eval_proto_rawDescOnce sync.Once
+	file_cel_expr_eval_proto_rawDescData = file_cel_expr_eval_proto_rawDesc
+)
+
+func file_cel_expr_eval_proto_rawDescGZIP() []byte {
+	file_cel_expr_eval_proto_rawDescOnce.Do(func() {
+		file_cel_expr_eval_proto_rawDescData = protoimpl.X.CompressGZIP(file_cel_expr_eval_proto_rawDescData)
+	})
+	return file_cel_expr_eval_proto_rawDescData
+}
+
+var file_cel_expr_eval_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_cel_expr_eval_proto_goTypes = []interface{}{
+	(*EvalState)(nil),        // 0: cel.expr.EvalState
+	(*ExprValue)(nil),        // 1: cel.expr.ExprValue
+	(*ErrorSet)(nil),         // 2: cel.expr.ErrorSet
+	(*UnknownSet)(nil),       // 3: cel.expr.UnknownSet
+	(*EvalState_Result)(nil), // 4: cel.expr.EvalState.Result
+	(*Value)(nil),            // 5: cel.expr.Value
+	(*status.Status)(nil),    // 6: google.rpc.Status
+}
+var file_cel_expr_eval_proto_depIdxs = []int32{
+	1, // 0: cel.expr.EvalState.values:type_name -> cel.expr.ExprValue
+	4, // 1: cel.expr.EvalState.results:type_name -> cel.expr.EvalState.Result
+	5, // 2: cel.expr.ExprValue.value:type_name -> cel.expr.Value
+	2, // 3: cel.expr.ExprValue.error:type_name -> cel.expr.ErrorSet
+	3, // 4: cel.expr.ExprValue.unknown:type_name -> cel.expr.UnknownSet
+	6, // 5: cel.expr.ErrorSet.errors:type_name -> google.rpc.Status
+	6, // [6:6] is the sub-list for method output_type
+	6, // [6:6] is the sub-list for method input_type
+	6, // [6:6] is the sub-list for extension type_name
+	6, // [6:6] is the sub-list for extension extendee
+	0, // [0:6] is the sub-list for field type_name
+}
+
+func init() { file_cel_expr_eval_proto_init() }
+func file_cel_expr_eval_proto_init() {
+	if File_cel_expr_eval_proto != nil {
+		return
+	}
+	file_cel_expr_value_proto_init()
+	if !protoimpl.UnsafeEnabled {
+		file_cel_expr_eval_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EvalState); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cel_expr_eval_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ExprValue); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cel_expr_eval_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ErrorSet); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cel_expr_eval_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*UnknownSet); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cel_expr_eval_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*EvalState_Result); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_cel_expr_eval_proto_msgTypes[1].OneofWrappers = []interface{}{
+		(*ExprValue_Value)(nil),
+		(*ExprValue_Error)(nil),
+		(*ExprValue_Unknown)(nil),
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_cel_expr_eval_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_cel_expr_eval_proto_goTypes,
+		DependencyIndexes: file_cel_expr_eval_proto_depIdxs,
+		MessageInfos:      file_cel_expr_eval_proto_msgTypes,
+	}.Build()
+	File_cel_expr_eval_proto = out.File
+	file_cel_expr_eval_proto_rawDesc = nil
+	file_cel_expr_eval_proto_goTypes = nil
+	file_cel_expr_eval_proto_depIdxs = nil
+}