WIP: dynamic ICryptoKeyValue registration prototype

Signed-off-by: Sergei Trofimov <[email protected]>

comid/cbor.go

@@ -4,6 +4,7 @@
 package comid
 
 import (
+	"fmt"
 	"reflect"
 
 	cbor "github.com/fxamacker/cbor/v2"
@@ -12,10 +13,8 @@ import (
 var (
 	em, emError = initCBOREncMode()
 	dm, dmError = initCBORDecMode()
-)
 
-func comidTags() cbor.TagSet {
-	comidTagsMap := map[uint64]interface{}{
+	comidTagsMap = map[uint64]interface{}{
 		32:  TaggedURI(""),
 		37:  TaggedUUID{},
 		111: TaggedOID{},
@@ -37,7 +36,9 @@ func comidTags() cbor.TagSet {
 		601: TaggedPSARefValID{},
 		602: TaggedCCAPlatformConfigID(""),
 	}
+)
 
+func comidTags() cbor.TagSet {
 	opts := cbor.TagOptions{
 		EncTag: cbor.EncTagRequired,
 		DecTag: cbor.DecTagRequired,
@@ -69,6 +70,28 @@ func initCBORDecMode() (dm cbor.DecMode, err error) {
 	return decOpt.DecModeWithTags(comidTags())
 }
 
+func registerCOMIDTag(tag uint64, t interface{}) error {
+	if _, exists := comidTagsMap[tag]; exists {
+		return fmt.Errorf("tag %d is already registered", tag)
+	}
+
+	comidTagsMap[tag] = t
+
+	var err error
+
+	em, err = initCBOREncMode()
+	if err != nil {
+		return err
+	}
+
+	dm, err = initCBORDecMode()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func init() {
 	if emError != nil {
 		panic(emError)

comid/class.go

@@ -23,39 +23,33 @@ type Class struct {
 // NewClassUUID instantiates a new Class object with the specified UUID as
 // identifier
 func NewClassUUID(uuid UUID) *Class {
-	c := Class{
-		ClassID: &ClassID{},
-	}
-
-	if c.ClassID.SetUUID(uuid) == nil {
+	classID, err := NewUUIDClassID(uuid)
+	if err != nil {
 		return nil
 	}
-	return &c
+
+	return &Class{ClassID: classID}
 }
 
 // NewClassImplID instantiates a new Class object that identifies the specified PSA
 // Implementation ID
 func NewClassImplID(implID ImplID) *Class {
-	c := Class{
-		ClassID: &ClassID{},
-	}
-
-	if c.ClassID.SetImplID(implID) == nil {
+	classID, err := NewImplIDClassID(implID)
+	if err != nil {
 		return nil
 	}
-	return &c
+
+	return &Class{ClassID: classID}
 }
 
 // NewClassOID instantiates a new Class object that identifies the OID
 func NewClassOID(oid string) *Class {
-	c := Class{
-		ClassID: &ClassID{},
-	}
-
-	if c.ClassID.SetOID(oid) == nil {
+	classID, err := NewOIDClassID(oid)
+	if err != nil {
 		return nil
 	}
-	return &c
+
+	return &Class{ClassID: classID}
 }
 
 // SetVendor sets the vendor metadata to the supplied string
@@ -131,7 +125,7 @@ func (o *Class) SetIndex(index uint64) *Class {
 // Valid checks the non-empty<> constraint on the map
 func (o Class) Valid() error {
 	// check non-empty<{ ... }>
-	if (o.ClassID == nil || o.ClassID.Unset()) &&
+	if (o.ClassID == nil || !o.ClassID.IsSet()) &&
 		o.Vendor == nil && o.Model == nil && o.Layer == nil && o.Index == nil {
 		return fmt.Errorf("class must not be empty")
 	}