Added New VeficationMethod ED25519VerificationKey2020 (#114)

Author: m-rit

did/document.go

@@ -340,7 +340,7 @@ func NewVerificationMethod(id DIDURL, keyType ssi.KeyType, controller DID, key c
 		}
 		vm.PublicKeyJwk = jwkAsMap
 	}
-	if keyType == ssi.ED25519VerificationKey2018 {
+	if keyType == ssi.ED25519VerificationKey2018 || keyType == ssi.ED25519VerificationKey2020  {
 		ed25519Key, ok := key.(ed25519.PublicKey)
 		if !ok {
 			return nil, errors.New("wrong key type")
@@ -371,7 +371,7 @@ func (v VerificationMethod) JWK() (jwk.Key, error) {
 func (v VerificationMethod) PublicKey() (crypto.PublicKey, error) {
 	var pubKey crypto.PublicKey
 	switch v.Type {
-	case ssi.ED25519VerificationKey2018:
+	case ssi.ED25519VerificationKey2018, ssi.ED25519VerificationKey2020:
 		var keyBytes []byte
 		var err error
 		if v.PublicKeyMultibase != "" {

did/document_test.go

@@ -139,6 +139,19 @@ func Test_Document(t *testing.T) {
 		require.NotNil(t, publicKey)
 	})
 
+	t.Run("ED25519VerificationKey2020", func(t *testing.T) {
+		keyID := DIDURL{DID: actual.ID}
+		keyID.Fragment = "added-assertion-method-1"
+
+		pubKey, _, _ := ed25519.GenerateKey(rand.Reader)
+		vm, err := NewVerificationMethod(keyID, ssi.ED25519VerificationKey2020, actual.ID, pubKey)
+		require.NoError(t, err)
+
+		publicKey, err := vm.PublicKey()
+		require.NoError(t, err)
+		require.NotNil(t, publicKey)
+	})
+
 	t.Run("ECDSASECP256K1VerificationKey2019", func(t *testing.T) {
 		t.Run("generated key", func(t *testing.T) {
 			keyID := DIDURL{DID: actual.ID}

spec-registries.go

@@ -7,9 +7,13 @@ type KeyType string
 const JsonWebKey2020 = KeyType("JsonWebKey2020")
 
 // ED25519VerificationKey2018 is the Ed25519VerificationKey2018 verification key type as specified here:
-// https://w3c-ccg.github.io/lds-ed25519-2018/
+// https://w3c-ccg.github.io/
 const ED25519VerificationKey2018 = KeyType("Ed25519VerificationKey2018")
 
+// ED25519VerificationKey2020 is the Ed25519VerificationKey2020 verification key type as specified here:
+// https://www.w3.org/TR/vc-di-eddsa/#ed25519verificationkey2020
+const ED25519VerificationKey2020 = KeyType("Ed25519VerificationKey2020")
+
 // ECDSASECP256K1VerificationKey2019 is the EcdsaSecp256k1VerificationKey2019 verification key type as specified here:
 // https://w3c-ccg.github.io/lds-ecdsa-secp256k1-2019/
 const ECDSASECP256K1VerificationKey2019 = KeyType("EcdsaSecp256k1VerificationKey2019")