/
publickey_test.go
489 lines (394 loc) · 13.8 KB
/
publickey_test.go
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// Copyright 2019 Teserakt AG
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package keys
import (
"bytes"
"encoding/binary"
"encoding/json"
"reflect"
"testing"
"time"
"golang.org/x/crypto/curve25519"
"golang.org/x/crypto/ed25519"
e4crypto "github.com/teserakt-io/e4go/crypto"
)
func TestNewPubKeyMaterial(t *testing.T) {
expectedSignerID := e4crypto.HashIDAlias("test")
_, expectedPrivateKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate ed25519 private key: %v", err)
}
expectedC2PubKey := getTestC2PubKey(t)
key, err := NewPubKeyMaterial(expectedSignerID, expectedPrivateKey, expectedC2PubKey)
if err != nil {
t.Fatalf("Key creation failed: %v", err)
}
assertPubKeyMaterialContains(t, key, expectedSignerID, expectedPrivateKey, expectedC2PubKey)
invalidSignerID := make([]byte, e4crypto.IDLen-1)
_, err = NewPubKeyMaterial(invalidSignerID, expectedPrivateKey, expectedC2PubKey)
if err == nil {
t.Fatal("Expected an invalid signerID to produce an error when creating a key material")
}
invalidPrivateKey := make([]byte, len(expectedPrivateKey))
_, err = NewPubKeyMaterial(expectedSignerID, invalidPrivateKey, expectedC2PubKey)
if err == nil {
t.Fatal("Expected an invalid private key to produce an error when creating a key material")
}
}
func assertPubKeyMaterialContains(
t *testing.T,
key PubKeyMaterial,
expectedSignerID []byte,
expectedPrivateKey ed25519.PrivateKey,
expectedC2PubKey []byte,
) {
typedKey, ok := key.(*pubKeyMaterial)
if !ok {
t.Fatalf("Unexpected type: got %T, wanted pubKeyMaterial", key)
}
if !bytes.Equal(typedKey.SignerID, expectedSignerID) {
t.Fatalf("Invalid signer ID: got %v, wanted %v", typedKey.SignerID, expectedSignerID)
}
if !bytes.Equal(typedKey.C2PubKey, expectedC2PubKey) {
t.Fatalf("Invalid c2PubKey: got %v, wanted %v", typedKey.C2PubKey, expectedC2PubKey)
}
if !bytes.Equal(typedKey.PrivateKey, expectedPrivateKey) {
t.Fatalf("Invalid private key: got %v, wanted %v", typedKey.PrivateKey, expectedPrivateKey)
}
}
func getTestC2PubKey(t *testing.T) []byte {
pubKey, _, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate ed25519 public key: %v", err)
}
return pubKey
}
func TestNewRandomPubKeyMaterial(t *testing.T) {
expectedSignerID := e4crypto.HashIDAlias("test")
expectedC2PubKey := getTestC2PubKey(t)
key, err := NewRandomPubKeyMaterial(expectedSignerID, expectedC2PubKey)
if err != nil {
t.Fatalf("Failed to create key: %v", err)
}
typedKey, ok := key.(*pubKeyMaterial)
if !ok {
t.Fatalf("Unexpected type: got %T, wanted pubKeyMaterial", key)
}
if !bytes.Equal(typedKey.SignerID, expectedSignerID) {
t.Fatalf("Invalid signerID: got %v, wanted: %v", typedKey.SignerID, expectedSignerID)
}
if !bytes.Equal(typedKey.C2PubKey, expectedC2PubKey) {
t.Fatalf("Invalid c2PubKey: got %v, wanted %v", typedKey.C2PubKey, expectedC2PubKey)
}
if err := e4crypto.ValidateEd25519PrivKey(typedKey.PrivateKey); err != nil {
t.Fatalf("Failed to validate private key: %v", err)
}
}
func TestPubKeyMaterialProtectUnprotectMessage(t *testing.T) {
clientID := e4crypto.HashIDAlias("test")
pubKey, privKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate ed25519 keys: %v", err)
}
k, err := NewPubKeyMaterial(clientID, privKey, getTestC2PubKey(t))
if err != nil {
t.Fatalf("Failed to create key: %v", err)
}
payload := []byte("some message")
topicKey := e4crypto.RandomKey()
protected, err := k.ProtectMessage(payload, topicKey)
if err != nil {
t.Fatalf("Failed to protect message: %v", err)
}
_, err = k.UnprotectMessage(protected, topicKey)
if err == nil {
t.Fatal("Expected unprotect to fail without the proper public key")
}
k.AddPubKey(clientID, pubKey)
unprotected, err := k.UnprotectMessage(protected, topicKey)
if err != nil {
t.Fatalf("Failed to unprotect message: %v", err)
}
if !bytes.Equal(unprotected, payload) {
t.Fatalf("Invalid unprotected message: got %v, wanted: %v", unprotected, payload)
}
badTopicKey := e4crypto.RandomKey()
_, err = k.UnprotectMessage(protected, badTopicKey)
if err == nil {
t.Fatal("Expected unprotect to fail without the proper topic key")
}
if _, err := k.UnprotectMessage([]byte("too short"), topicKey); err == nil {
t.Fatal("Expected unprotect to fail with a too short protected message")
}
if _, err := k.ProtectMessage([]byte("some message"), []byte("not a key")); err == nil {
t.Fatal("Expected protect message to fail with a bad topic key")
}
tooOldProtected := make([]byte, len(protected))
copy(tooOldProtected, protected)
tooOldTs := make([]byte, e4crypto.TimestampLen)
binary.LittleEndian.PutUint64(tooOldTs, uint64(time.Now().Add(-(e4crypto.MaxDelayDuration + 1)).Unix()))
tooOldProtected = append(tooOldTs, tooOldProtected[e4crypto.TimestampLen:]...)
if _, err := k.UnprotectMessage(tooOldProtected, topicKey); err == nil {
t.Fatal("Expected unprotect message to fail with a too old timestamp")
}
}
func TestPubKeyMaterialUnprotectCommand(t *testing.T) {
clientID := e4crypto.HashIDAlias("test")
pubKey, privKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate ed25519 keys: %v", err)
}
c2PrivateCurveKey := e4crypto.RandomKey()
c2PublicCurveKey, err := curve25519.X25519(c2PrivateCurveKey, curve25519.Basepoint)
if err != nil {
t.Fatalf("Failed to generate curve25519 keys: %v", err)
}
k, err := NewPubKeyMaterial(clientID, privKey, c2PublicCurveKey)
if err != nil {
t.Fatalf("Failed to create key: %v", err)
}
command := []byte{0x01, 0x02, 0x03, 0x04}
sharedKey, err := curve25519.X25519(c2PrivateCurveKey, e4crypto.PublicEd25519KeyToCurve25519(pubKey))
if err != nil {
t.Fatalf("curve25519 X25519 failed: %v", err)
}
protectedCmd, err := e4crypto.ProtectSymKey(command, e4crypto.Sha3Sum256(sharedKey))
if err != nil {
t.Fatalf("Failed to protect command: %v", err)
}
unprotectedCmd, err := k.UnprotectCommand(protectedCmd)
if err != nil {
t.Fatalf("Failed to unprotect command: %v", err)
}
if !bytes.Equal(unprotectedCmd, command) {
t.Fatalf("Invalid unprotected command: got %v, wanted %v", unprotectedCmd, command)
}
}
func TestPubKeyMaterialPubKeys(t *testing.T) {
clientID := e4crypto.HashIDAlias("test")
k, err := NewRandomPubKeyMaterial(clientID, getTestC2PubKey(t))
if err != nil {
t.Fatalf("Failed to create key: %v", err)
}
if c := len(k.GetPubKeys()); c != 0 {
t.Fatalf("Invalid pubkey count: got %d, wanted 0", c)
}
pk0, _, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate public key: %v", err)
}
if err := k.AddPubKey([]byte("id1"), pk0); err != nil {
t.Fatalf("Failed to add pubkey for id1: %v", err)
}
pk, err := k.GetPubKey([]byte("id1"))
if err != nil {
t.Fatalf("Failed to get pubKey: %v", err)
}
if !bytes.Equal(pk, pk0) {
t.Fatalf("Invalid pubKey for id1: got %v, wanted %v", pk, pk0)
}
pk1, _, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate public key: %v", err)
}
if err := k.AddPubKey([]byte("id1"), pk1); err != nil {
t.Fatalf("Failed to add pubkey for id1: %v", err)
}
if c := len(k.GetPubKeys()); c != 1 {
t.Fatalf("Invalid pubkey count: got %d, wanted 1", c)
}
pk, err = k.GetPubKey([]byte("id1"))
if err != nil {
t.Fatalf("Failed to get pubKey: %v", err)
}
if !bytes.Equal(pk, pk1) {
t.Fatalf("Invalid pubkey for id1: got %v, wanted %v", pk, pk1)
}
pk2, _, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate public key: %v", err)
}
if err := k.AddPubKey([]byte("id2"), pk2); err != nil {
t.Fatalf("Failed to add pubkey for id2: %v", err)
}
if c := len(k.GetPubKeys()); c != 2 {
t.Fatalf("Invalid pubkey count: got %d, wanted 2", c)
}
pk, err = k.GetPubKey([]byte("id1"))
if err != nil {
t.Fatalf("Failed to get public key: %v", err)
}
if !bytes.Equal(pk, pk1) {
t.Fatalf("Invalid pubkey for id1: got %v, wanted %v", pk, pk1)
}
pk, err = k.GetPubKey([]byte("id2"))
if err != nil {
t.Fatalf("Failed to get public key: %v", err)
}
if !bytes.Equal(pk, pk2) {
t.Fatalf("Invalid pubkey for id2: got %v, wanted %v", pk, pk2)
}
if err := k.RemovePubKey([]byte("id1")); err != nil {
t.Fatalf("Failed to remove pubkey for id1: %v", err)
}
if c := len(k.GetPubKeys()); c != 1 {
t.Fatalf("Invalid pubkey count: got %d, wanted 1", c)
}
pk, err = k.GetPubKey([]byte("id2"))
if err != nil {
t.Fatalf("Failed to get public key: %v", err)
}
if !bytes.Equal(pk, pk2) {
t.Fatalf("Invalid pubkey for id2: got %v, wanted %v", pk, pk2)
}
if _, err := k.GetPubKey([]byte("id1")); err != ErrPubKeyNotFound {
t.Fatal("Expected pubkey for id1 to be removed")
}
// Double remove must return an error
if err := k.RemovePubKey([]byte("id1")); err == nil {
t.Fatal("Expected an error when removing an inexistent pubKey")
}
// Reset clears all
k.ResetPubKeys()
if c := len(k.GetPubKeys()); c != 0 {
t.Fatalf("Invalid pubkey count: got %d, wanted 0", c)
}
if _, err := k.GetPubKey([]byte("id2")); err != ErrPubKeyNotFound {
t.Fatal("Expected pubkey for id2 to be removed")
}
// Adding invalid keys return errors
if err := k.AddPubKey([]byte("id1"), []byte("not a key")); err == nil {
t.Fatal("Expected an error when adding an invalid pubKey")
}
}
func TestPubKeyMaterialSetKey(t *testing.T) {
_, privateKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate key: %v", err)
}
clientID := e4crypto.HashIDAlias("test")
k, err := NewPubKeyMaterial(clientID, privateKey, getTestC2PubKey(t))
if err != nil {
t.Fatalf("Failed to create key: %v", err)
}
typedKey, ok := k.(*pubKeyMaterial)
if !ok {
t.Fatalf("Unexpected type: got %T, wanted pubKeyMaterial", k)
}
if !bytes.Equal(typedKey.PrivateKey, privateKey) {
t.Fatalf("Invalid private key: got %v, wanted %v", typedKey.PrivateKey, privateKey)
}
_, privateKey2, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate key: %v", err)
}
if err := typedKey.SetKey(privateKey2); err != nil {
t.Fatalf("Failed to set key: %v", err)
}
if !bytes.Equal(typedKey.PrivateKey, privateKey2) {
t.Fatalf("Invalid private key: got %v, wanted %v", typedKey.PrivateKey, privateKey2)
}
if err := typedKey.SetKey([]byte("not a key")); err == nil {
t.Fatal("Expected SetKey with invalid key to returns an error")
}
privateKey2[0] = privateKey2[0] + 1
if bytes.Equal(typedKey.PrivateKey, privateKey2) {
t.Fatalf("Expected private key slice to have been copied, but it is still pointing to same slice")
}
}
func TestPubKeyMaterialMarshalJSON(t *testing.T) {
_, privateKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate key: %v", err)
}
clientID := e4crypto.HashIDAlias("test")
c2Pk := getTestC2PubKey(t)
k, err := NewPubKeyMaterial(clientID, privateKey, c2Pk)
if err != nil {
t.Fatalf("Failed to create key: %v", err)
}
pk1, _, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate public key: %v", err)
}
if err := k.AddPubKey(e4crypto.HashIDAlias("id1"), pk1); err != nil {
t.Fatalf("Failed to add pubkey for id1: %v", err)
}
pk2, _, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate public key: %v", err)
}
if err := k.AddPubKey(e4crypto.HashIDAlias("id2"), pk2); err != nil {
t.Fatalf("Failed to add pubkey for id2: %v", err)
}
jsonKey, err := json.Marshal(k)
if err != nil {
t.Fatalf("Failed to marshal key into json: %v", err)
}
unmarshalledKey, err := FromRawJSON(jsonKey)
if err != nil {
t.Fatalf("Failed to unmarshal json key: %v", err)
}
if !reflect.DeepEqual(unmarshalledKey, k) {
t.Fatalf("Invalid unmarshalled key: got %v, wanted %v", unmarshalledKey, k)
}
}
func TestPrecomputeSharedKey(t *testing.T) {
_, privateKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate key: %v", err)
}
clientID := e4crypto.HashIDAlias("test")
c2Pk := getTestC2PubKey(t)
k, err := NewPubKeyMaterial(clientID, privateKey, c2Pk)
if err != nil {
t.Fatalf("Failed to create pubKeyMaterial: %v", err)
}
typedKey, ok := k.(*pubKeyMaterial)
if !ok {
t.Fatalf("failed to cast key to pubKeyMaterial")
}
if len(typedKey.sharedKey) == 0 {
t.Fatalf("Expected sharedKey to have length > 0")
}
if !bytes.Equal(typedKey.C2PubKey, c2Pk) {
t.Fatalf("Expected C2 pubkey to be %v, got %v", c2Pk, typedKey.C2PubKey)
}
originalSharedKey := make([]byte, len(typedKey.sharedKey))
copy(originalSharedKey, typedKey.sharedKey)
newC2Pk := getTestC2PubKey(t)
if err := typedKey.SetC2PubKey(newC2Pk); err != nil {
t.Fatalf("failed to set key: %v", err)
}
if !bytes.Equal(typedKey.C2PubKey, newC2Pk) {
t.Fatalf("Expected new C2 pubkey to be %v, got %v", newC2Pk, typedKey.C2PubKey)
}
if bytes.Equal(typedKey.sharedKey, originalSharedKey) {
t.Fatal("Expected shared key to change when c2 key is changed")
}
copy(originalSharedKey, typedKey.sharedKey)
_, newPrivateKey, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatalf("Failed to generate key: %v", err)
}
if err := typedKey.SetKey(newPrivateKey); err != nil {
t.Fatalf("failed to set key: %v", err)
}
if !bytes.Equal(typedKey.PrivateKey, newPrivateKey) {
t.Fatalf("Expected new private key to be %v, got %v", newPrivateKey, typedKey.PrivateKey)
}
if bytes.Equal(typedKey.sharedKey, originalSharedKey) {
t.Fatal("Expected shared key to change when private key is changed")
}
}