Drop DER encoding for composite ML-KEM functions

Composite-MLKEM-2024.asn

@@ -20,25 +20,6 @@ KEM-ALGORITHM
       { iso(1) identified-organization(3) dod(6) internet(1)
         security(5) mechanisms(5) pkix(7) id-mod(0)
         id-mod-kemAlgorithmInformation-2023(109) }
-
-SubjectPublicKeyInfo
-  FROM PKIX1Explicit-2009
-      { iso(1) identified-organization(3) dod(6) internet(1)
-        security(5) mechanisms(5) pkix(7) id-mod(0)
-        id-mod-pkix1-explicit-02(51) }
-
-OneAsymmetricKey
-    FROM AsymmetricKeyPackageModuleV1
-      { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1)
-        pkcs-9(9) smime(16) modules(0)
-        id-mod-asymmetricKeyPkgV1(50) }
-
-RSAPublicKey, ECPoint
-  FROM PKIXAlgs-2009 
-    { iso(1) identified-organization(3) dod(6)
-      internet(1) security(5) mechanisms(5) pkix(7) id-mod(0)
-      id-mod-pkix1-algorithms2008-02(56) }
-
 ;
 
 
@@ -50,42 +31,42 @@ RSAPublicKey, ECPoint
 der OBJECT IDENTIFIER ::=
   {joint-iso-itu-t asn1(1) ber-derived(2) distinguished-encoding(1)}
 
-
--- Just for testing, to be assigned by IANA
-id-raw-key OBJECT IDENTIFIER ::= {
-   joint-iso-itu-t(2) country(16) us(840) organization(1)
-   entrust(114027) algorithm(80) composite(8) raw(999) 1 }
-
 --
 -- Composite KEM basic structures
 --
 
-CompositeKEMPublicKey ::= SEQUENCE SIZE (2) OF BIT STRING
+-- When a CompositeKEMPublicKey is used with an RSA public key, the BIT STRING itself is generated
+-- by the concatenation of a raw ML-KEM key according to {{I-D.ietf-lamps-kyber-certificates}} and
+-- an RSAPublicKey (which is a DER encoded RSAPublicKey).
+
+-- When a CompositeKEMPublicKey is used with an EC public key, the BIT STRING itself is generated
+-- by the concatenation of a raw ML-KEM key according to {{I-D.ietf-lamps-kyber-certificates}} and
+-- an ECDHPublicKey (which is a DER encoded ECPoint).
+
+-- When a CompositeKEMPublicKey is used with an Edwards public key, the BIT STRING itself is generated
+-- by the concatenation of a raw ML-KEM key according to {{I-D.ietf-lamps-kyber-certificates}} and
+-- a raw Edwards public key according to [RFC8410].
 
-CompositeKEMPublicKeyOs ::= OCTET STRING (CONTAINING 
-                                CompositeKEMPublicKey ENCODED BY der)
+CompositeKEMPublicKey ::= BIT STRING
 
-CompositeKEMPublicKeyBs ::= BIT STRING (CONTAINING 
-                                CompositeKEMPublicKey ENCODED BY der)
+-- When a CompositeKEMPrivateKey is used with an RSA private key, the BIT STRING itself is generated
+-- by the concatenation of a raw ML-KEM key according to {{I-D.ietf-lamps-kyber-certificates}} and
+-- an RSAPrivateKey (which is a DER encoded RSAPrivateKey).
 
-CompositeKEMPrivateKey ::= SEQUENCE SIZE (2) OF OCTET STRING
+-- When a CompositeKEMPrivateKey is used with an EC private key, the BIT STRING itself is generated
+-- by the concatenation of a raw ML-KEM key according to {{I-D.ietf-lamps-kyber-certificates}} and
+-- an ECDHPrivateKey (which is a DER encoded ECPoint).
 
-CompositeCiphertextValue ::= SEQUENCE SIZE (2) OF OCTET STRING
+-- When a CompositeKEMPrivateKey is used with an Edwards private key, the BIT STRING itself is generated
+-- by the concatenation of a raw ML-KEM key according to {{I-D.ietf-lamps-kyber-certificates}} and
+-- a raw Edwards private key according to [RFC8410].
 
-RsaCompositeKemPublicKey ::= SEQUENCE {
-        firstPublicKey BIT STRING (ENCODED BY id-raw-key),
-        secondPublicKey BIT STRING (CONTAINING RSAPublicKey)
-      }	  
+CompositeKEMPrivateKey ::= OCTET STRING
 
-EcCompositeKemPublicKey ::= SEQUENCE {
-        firstPublicKey BIT STRING (ENCODED BY id-raw-key),
-        secondPublicKey BIT STRING (CONTAINING ECPoint)
-      }
+-- Composite Ciphertext Value is just an OCTET STRING and is a concatenation of the component ciphertext
+-- values.
 
-EdCompositeKemPublicKey ::= SEQUENCE {
-        firstPublicKey BIT STRING (ENCODED BY id-raw-key),
-        secondPublicKey BIT STRING (ENCODED BY id-raw-key)
-      }
+CompositeCiphertextValue ::= OCTET STRING
 
 --
 -- Information Object Classes
@@ -125,7 +106,7 @@ id-MLKEM768-RSA2048 OBJECT IDENTIFIER ::= {
 pk-MLKEM768-RSA2048 PUBLIC-KEY ::= 
   pk-CompositeKEM { 
     id-MLKEM768-RSA2048, 
-    RsaCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM768-RSA2048 KEM-ALGORITHM ::= 
     kema-CompositeKEM{
@@ -142,7 +123,7 @@ id-MLKEM768-RSA3072 OBJECT IDENTIFIER ::= {
 pk-MLKEM768-RSA3072 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM768-RSA3072, 
-    RsaCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM768-RSA3072 KEM-ALGORITHM ::=
     kema-CompositeKEM{
@@ -159,7 +140,7 @@ id-MLKEM768-RSA4096 OBJECT IDENTIFIER ::= {
 pk-MLKEM768-RSA4096 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM768-RSA4096, 
-    RsaCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM768-RSA4096 KEM-ALGORITHM ::=
     kema-CompositeKEM{
@@ -175,7 +156,7 @@ id-MLKEM768-ECDH-P384 OBJECT IDENTIFIER ::= {
 pk-MLKEM768-ECDH-P384 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM768-ECDH-P384, 
-    EcCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM768-ECDH-P384 KEM-ALGORITHM ::= 
     kema-CompositeKEM{
@@ -191,7 +172,7 @@ id-MLKEM768-ECDH-brainpoolP256r1 OBJECT IDENTIFIER ::= {
 pk-MLKEM768-ECDH-brainpoolP256r1 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM768-ECDH-brainpoolP256r1, 
-    EcCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM768-ECDH-brainpoolP256r1 KEM-ALGORITHM ::= 
     kema-CompositeKEM{
@@ -207,7 +188,7 @@ id-MLKEM768-X25519 OBJECT IDENTIFIER ::= {
 pk-MLKEM768-X25519 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM768-X25519, 
-    EdCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM768-X25519 KEM-ALGORITHM ::= 
     kema-CompositeKEM{
@@ -224,7 +205,7 @@ id-MLKEM1024-ECDH-P384 OBJECT IDENTIFIER ::= {
 pk-MLKEM1024-ECDH-P384 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM1024-ECDH-P384, 
-    EcCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM1024-ECDH-P384 KEM-ALGORITHM ::= 
     kema-CompositeKEM{
@@ -240,7 +221,7 @@ id-MLKEM1024-ECDH-brainpoolP384r1 OBJECT IDENTIFIER ::= {
 pk-MLKEM1024-ECDH-brainpoolP384r1 PUBLIC-KEY ::= 
   pk-CompositeKEM{
     id-MLKEM1024-ECDH-brainpoolP384r1, 
-    EcCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM1024-ECDH-brainpoolP384r1 KEM-ALGORITHM ::= 
     kema-CompositeKEM{
@@ -256,7 +237,7 @@ id-MLKEM1024-X448 OBJECT IDENTIFIER ::= {
 pk-MLKEM1024-X448 PUBLIC-KEY ::= 
   pk-CompositeKEM {
     id-MLKEM1024-X448, 
-    EdCompositeKemPublicKey }
+    CompositeKEMPublicKey }
 
 kema-MLKEM1024-X448 KEM-ALGORITHM ::= 
     kema-CompositeKEM{