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// Copyright 2022-2023 The NATS Authors
// 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 nkeys
import (
"bytes"
"reflect"
"testing"
)
func testCurve(t *testing.T, kp KeyPair) {
// Check seed
seed, err := kp.Seed()
if err != nil {
t.Fatalf("Unexpected error retrieving seed: %v", err)
}
_, err = Decode(PrefixByteSeed, seed)
if err != nil {
t.Fatalf("Expected a proper seed string, got %s with err: %v", seed, err)
}
if pb, _, err := DecodeSeed(seed); err != nil || pb != PrefixByteCurve {
t.Fatalf("Expected a proper seed string, got %s", seed)
}
// Check public key
pub, err := kp.PublicKey()
if err != nil {
t.Fatalf("Received an error retrieving public key: %v", err)
}
if pub[0] != 'X' {
t.Fatalf("Expected a prefix of 'X' but got %c", pub[0])
}
if !IsValidPublicCurveKey(pub) {
t.Fatalf("Not a valid public curve key")
}
// Check private key
private, err := kp.PrivateKey()
if err != nil {
t.Fatalf("Received an error retrieving private key: %v", err)
}
if private[0] != 'P' {
t.Fatalf("Expected a prefix of 'P' but got %v", private[0])
}
// Seal
rkp, _ := CreateCurveKeys()
rpub, _ := rkp.PublicKey()
msg := []byte("Hello xkeys!")
encrypted, err := kp.Seal(msg, rpub)
if err != nil {
t.Fatalf("Received an error on Seal: %v", err)
}
decrypted, err := rkp.Open(encrypted, pub)
if err != nil {
t.Fatalf("Received an error on Open: %v", err)
}
if !bytes.Equal(decrypted, msg) {
t.Fatalf("Expected %q to be %q", decrypted, msg)
}
}
func TestCurveFromCreateCurveKeys(t *testing.T) {
kp, err := CreateCurveKeys()
if err != nil {
t.Fatalf("Expected nil error on CreateCurveKeys, received %v", err)
}
if kp == nil {
t.Fatal("Expected a non-nil curve key pair")
}
testCurve(t, kp)
}
func TestCurveFromCreatePair(t *testing.T) {
kp, err := CreatePair(PrefixByteCurve)
if err != nil {
t.Fatalf("Expected nil error on CreatePair, received %v", err)
}
if kp == nil {
t.Fatal("Expected a non-nil curve key pair")
}
testCurve(t, kp)
}
func TestCurveFromSeed(t *testing.T) {
kp, _ := CreateCurveKeys()
seed, _ := kp.Seed()
nkp, err := FromCurveSeed(seed)
if err != nil {
t.Fatalf("Unexpected error deriving curve keypair: %v", err)
}
if !reflect.DeepEqual(kp.(*ckp), nkp.(*ckp)) {
t.Fatal("Expected the curve pairs to be equal")
}
testCurve(t, nkp)
}
func TestCurveFromKeyPair(t *testing.T) {
kp, _ := CreatePair(PrefixByteCurve)
_, err := kp.Sign([]byte("hello"))
if err == nil {
t.Fatal("Expected sign to fail as it non supported operation")
}
if err != ErrInvalidCurveKeyOperation {
t.Fatalf("Expected %v but got %v", ErrInvalidCurveKeyOperation, err)
}
err = kp.Verify([]byte("hello"), []byte("bad"))
if err == nil {
t.Fatal("Expected verify to fail as it is unsupported operation")
}
if err != ErrInvalidCurveKeyOperation {
t.Fatalf("Expected %v but got %v", ErrInvalidCurveKeyOperation, err)
}
}
func TestCurvePublic(t *testing.T) {
kp, _ := CreatePair(PrefixByteCurve)
_, err := kp.Sign([]byte("hello"))
if err == nil {
t.Fatal("Expected sign to fail as it non supported operation")
}
pk, err := kp.PublicKey()
if err != nil {
t.Fatalf("Unexpected public key error: %v", err)
}
pub, err := FromPublicKey(pk)
if err != nil {
t.Fatalf("Unexpected error when creating public key: %v", err)
}
_, err = pub.Open([]byte("hello"), "bad")
if err != ErrCannotOpen {
t.Fatalf("Expected %v but got %v", ErrCannotOpen, err)
}
_, err = pub.Seal([]byte("hello"), "bad")
if err != ErrCannotSeal {
t.Fatalf("Expected %v but got %v", ErrCannotSeal, err)
}
_, err = pub.SealWithRand([]byte("hello"), "bad", nil)
if err != ErrCannotSeal {
t.Fatalf("Expected %v but got %v", ErrCannotSeal, err)
}
}
func TestCurvePublicEmptyBug(t *testing.T) {
kp, _ := CreateCurveKeys()
pub, _ := kp.PublicKey()
rkp, _ := CreateCurveKeys()
rpub, _ := rkp.PublicKey()
msg := []byte("Empty public better not work!")
encrypted, err := kp.Seal(msg, rpub)
if err != nil {
t.Fatalf("Received an error on Seal: %v", err)
}
decrypted, err := rkp.Open(encrypted, pub)
if err != nil {
t.Fatalf("Received an error on Open: %v", err)
}
if !bytes.Equal(decrypted, msg) {
t.Fatalf("Expected %q to be %q", decrypted, msg)
}
// Check an empty pub key.
var empty [curveKeyLen]byte
epub, _ := Encode(PrefixByteCurve, empty[:])
_, err = rkp.Open(encrypted, string(epub))
if err == nil {
t.Fatalf("Expected a failure with empty pub key")
}
}
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