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package tpm2test
import (
"bytes"
"encoding/binary"
"testing"
. "github.com/google/go-tpm/tpm2"
"github.com/google/go-tpm/tpm2/transport/simulator"
)
func TestNVAuthWrite(t *testing.T) {
thetpm, err := simulator.OpenSimulator()
if err != nil {
t.Fatalf("could not connect to TPM simulator: %v", err)
}
defer thetpm.Close()
def := NVDefineSpace{
AuthHandle: TPMRHOwner,
Auth: TPM2BAuth{
Buffer: []byte("p@ssw0rd"),
},
PublicInfo: New2B(
TPMSNVPublic{
NVIndex: TPMHandle(0x0180000F),
NameAlg: TPMAlgSHA256,
Attributes: TPMANV{
OwnerWrite: true,
OwnerRead: true,
AuthWrite: true,
AuthRead: true,
NT: TPMNTOrdinary,
NoDA: true,
},
DataSize: 4,
}),
}
if _, err := def.Execute(thetpm); err != nil {
t.Fatalf("Calling TPM2_NV_DefineSpace: %v", err)
}
pub, err := def.PublicInfo.Contents()
if err != nil {
t.Fatalf("%v", err)
}
nvName, err := NVName(pub)
if err != nil {
t.Fatalf("Calculating name of NV index: %v", err)
}
prewrite := NVWrite{
AuthHandle: AuthHandle{
Handle: pub.NVIndex,
Name: *nvName,
Auth: PasswordAuth([]byte("p@ssw0rd")),
},
NVIndex: NamedHandle{
Handle: pub.NVIndex,
Name: *nvName,
},
Data: TPM2BMaxNVBuffer{
Buffer: []byte{0x01, 0x02, 0x03, 0x04},
},
Offset: 0,
}
if _, err := prewrite.Execute(thetpm); err != nil {
t.Errorf("Calling TPM2_NV_Write: %v", err)
}
read := NVReadPublic{
NVIndex: pub.NVIndex,
}
readRsp, err := read.Execute(thetpm)
if err != nil {
t.Fatalf("Calling TPM2_NV_ReadPublic: %v", err)
}
t.Logf("Name: %x", readRsp.NVName.Buffer)
write := NVWrite{
AuthHandle: AuthHandle{
Handle: TPMRHOwner,
Auth: HMAC(TPMAlgSHA256, 16, Auth([]byte{})),
},
NVIndex: NamedHandle{
Handle: pub.NVIndex,
Name: readRsp.NVName,
},
Data: TPM2BMaxNVBuffer{
Buffer: []byte{0x01, 0x02, 0x03, 0x04},
},
Offset: 0,
}
if _, err := write.Execute(thetpm); err != nil {
t.Errorf("Calling TPM2_NV_Write: %v", err)
}
}
func TestNVAuthIncrement(t *testing.T) {
thetpm, err := simulator.OpenSimulator()
if err != nil {
t.Fatalf("could not connect to TPM simulator: %v", err)
}
defer thetpm.Close()
// Define the counter space
def := NVDefineSpace{
AuthHandle: TPMRHOwner,
Auth: TPM2BAuth{
Buffer: []byte("p@ssw0rd"),
},
PublicInfo: New2B(
TPMSNVPublic{
NVIndex: TPMHandle(0x0180000F),
NameAlg: TPMAlgSHA256,
Attributes: TPMANV{
OwnerWrite: true,
OwnerRead: true,
AuthWrite: true,
AuthRead: true,
NT: TPMNTCounter,
NoDA: true,
},
DataSize: 8,
}),
}
if _, err := def.Execute(thetpm); err != nil {
t.Fatalf("Calling TPM2_NV_DefineSpace: %v", err)
}
pub, err := def.PublicInfo.Contents()
if err != nil {
t.Fatalf("%v", err)
}
// Calculate the Name of the index as of its creation
// (i.e., without NV_WRITTEN set).
nvName, err := NVName(pub)
if err != nil {
t.Fatalf("Calculating name of NV index: %v", err)
}
incr := NVIncrement{
AuthHandle: AuthHandle{
Handle: TPMRHOwner,
Auth: HMAC(TPMAlgSHA256, 16, Auth([]byte{})),
},
NVIndex: NamedHandle{
Handle: pub.NVIndex,
Name: *nvName,
},
}
if _, err := incr.Execute(thetpm); err != nil {
t.Errorf("Calling TPM2_NV_Increment: %v", err)
}
// The NV index's Name has changed. Ask the TPM for it.
readPub := NVReadPublic{
NVIndex: pub.NVIndex,
}
readPubRsp, err := readPub.Execute(thetpm)
if err != nil {
t.Fatalf("Calling TPM2_NV_ReadPublic: %v", err)
}
incr.NVIndex = NamedHandle{
Handle: pub.NVIndex,
Name: readPubRsp.NVName,
}
read := NVRead{
AuthHandle: AuthHandle{
Handle: TPMRHOwner,
Auth: HMAC(TPMAlgSHA256, 16, Auth([]byte{})),
},
NVIndex: NamedHandle{
Handle: pub.NVIndex,
Name: readPubRsp.NVName,
},
Size: 8,
}
readRsp, err := read.Execute(thetpm)
if err != nil {
t.Fatalf("Calling TPM2_NV_Read: %v", err)
}
if _, err := incr.Execute(thetpm); err != nil {
t.Errorf("Calling TPM2_NV_Increment: %v", err)
}
var val1 uint64
err = binary.Read(bytes.NewReader(readRsp.Data.Buffer), binary.BigEndian, &val1)
if err != nil {
t.Fatalf("Parsing counter: %v", err)
}
readRsp, err = read.Execute(thetpm)
if err != nil {
t.Fatalf("Calling TPM2_NV_Read: %v", err)
}
var val2 uint64
err = binary.Read(bytes.NewReader(readRsp.Data.Buffer), binary.BigEndian, &val2)
if err != nil {
t.Fatalf("Parsing counter: %v", err)
}
if val2 != (val1 + 1) {
t.Errorf("want %v got %v", val1+1, val2)
}
}
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