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package tpm2
import (
"bytes"
"testing"
)
func TestMarshal2B(t *testing.T) {
// Define some TPMT_Public
pub := TPMTPublic{
Type: TPMAlgKeyedHash,
NameAlg: TPMAlgSHA256,
ObjectAttributes: TPMAObject{
FixedTPM: true,
FixedParent: true,
UserWithAuth: true,
NoDA: true,
},
}
// Get the wire-format version
pubBytes := Marshal(pub)
// Create two versions of the same 2B:
// one instantiated by the actual TPMTPublic
// one instantiated by the contents
var boxed1 TPM2BPublic
var boxed2 TPM2BPublic
boxed1 = New2B(pub)
boxed2 = BytesAs2B[TPMTPublic](pubBytes)
boxed1Bytes := Marshal(boxed1)
boxed2Bytes := Marshal(boxed2)
if !bytes.Equal(boxed1Bytes, boxed2Bytes) {
t.Errorf("got %x want %x", boxed2Bytes, boxed1Bytes)
}
z, err := Unmarshal[TPM2BPublic](boxed1Bytes)
if err != nil {
t.Fatalf("could not unmarshal TPM2BPublic: %v", err)
}
t.Logf("%v", z)
boxed3Bytes := Marshal(z)
if !bytes.Equal(boxed1Bytes, boxed3Bytes) {
t.Errorf("got %x want %x", boxed3Bytes, boxed1Bytes)
}
// Make a nonsense 2B_Public, demonstrating that the library doesn't have to understand the serialization
BytesAs2B[TPMTPublic]([]byte{0xff})
}
func unwrap[T any](f func() (*T, error)) *T {
t, err := f()
if err != nil {
panic(err.Error())
}
return t
}
func TestMarshalT(t *testing.T) {
// Define some TPMT_Public
pub := TPMTPublic{
Type: TPMAlgECC,
NameAlg: TPMAlgSHA256,
ObjectAttributes: TPMAObject{
SignEncrypt: true,
},
Parameters: NewTPMUPublicParms(
TPMAlgECC,
&TPMSECCParms{
CurveID: TPMECCNistP256,
},
),
Unique: NewTPMUPublicID(
// This happens to be a P256 EKpub from the simulator
TPMAlgECC,
&TPMSECCPoint{
X: TPM2BECCParameter{},
Y: TPM2BECCParameter{},
},
),
}
// Marshal each component of the parameters
symBytes := Marshal(&unwrap(pub.Parameters.ECCDetail).Symmetric)
t.Logf("Symmetric: %x\n", symBytes)
sym, err := Unmarshal[TPMTSymDefObject](symBytes)
if err != nil {
t.Fatalf("could not unmarshal TPMTSymDefObject: %v", err)
}
symBytes2 := Marshal(sym)
if !bytes.Equal(symBytes, symBytes2) {
t.Errorf("want %x\ngot %x", symBytes, symBytes2)
}
schemeBytes := Marshal(&unwrap(pub.Parameters.ECCDetail).Scheme)
t.Logf("Scheme: %x\n", symBytes)
scheme, err := Unmarshal[TPMTECCScheme](schemeBytes)
if err != nil {
t.Fatalf("could not unmarshal TPMTECCScheme: %v", err)
}
schemeBytes2 := Marshal(scheme)
if !bytes.Equal(schemeBytes, schemeBytes2) {
t.Errorf("want %x\ngot %x", schemeBytes, schemeBytes2)
}
kdfBytes := Marshal(&unwrap(pub.Parameters.ECCDetail).KDF)
t.Logf("KDF: %x\n", kdfBytes)
kdf, err := Unmarshal[TPMTKDFScheme](kdfBytes)
if err != nil {
t.Fatalf("could not unmarshal TPMTKDFScheme: %v", err)
}
kdfBytes2 := Marshal(kdf)
if !bytes.Equal(kdfBytes, kdfBytes2) {
t.Errorf("want %x\ngot %x", kdfBytes, kdfBytes2)
}
// Marshal the parameters
parmsBytes := Marshal(unwrap(pub.Parameters.ECCDetail))
t.Logf("Parms: %x\n", parmsBytes)
parms, err := Unmarshal[TPMSECCParms](parmsBytes)
if err != nil {
t.Fatalf("could not unmarshal TPMSECCParms: %v", err)
}
parmsBytes2 := Marshal(parms)
if !bytes.Equal(parmsBytes, parmsBytes2) {
t.Errorf("want %x\ngot %x", parmsBytes, parmsBytes2)
}
// Marshal the unique area
uniqueBytes := Marshal(unwrap(pub.Unique.ECC))
t.Logf("Unique: %x\n", uniqueBytes)
unique, err := Unmarshal[TPMSECCPoint](uniqueBytes)
if err != nil {
t.Fatalf("could not unmarshal TPMSECCPoint: %v", err)
}
uniqueBytes2 := Marshal(unique)
if !bytes.Equal(uniqueBytes, uniqueBytes2) {
t.Errorf("want %x\ngot %x", uniqueBytes, uniqueBytes2)
}
// Get the wire-format version of the whole thing
pubBytes := Marshal(&pub)
pub2, err := Unmarshal[TPMTPublic](pubBytes)
if err != nil {
t.Fatalf("could not unmarshal TPMTPublic: %v", err)
}
// Some default fields might have been populated in the round-trip. Get the wire-format again and compare.
pub2Bytes := Marshal(pub2)
if !bytes.Equal(pubBytes, pub2Bytes) {
t.Errorf("want %x\ngot %x", pubBytes, pub2Bytes)
}
}
|
