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package signing
import (
"crypto/ed25519"
"encoding/base64"
"errors"
"strings"
"testing"
)
// withKey sets Key to pub for the test.
func withKey(t *testing.T, pub ed25519.PublicKey) {
t.Helper()
old := Key
Key = base64.StdEncoding.EncodeToString(pub)
t.Cleanup(func() { Key = old })
}
func sign(priv ed25519.PrivateKey, data []byte) []byte {
return []byte(base64.StdEncoding.EncodeToString(ed25519.Sign(priv, data)) + "\n")
}
func TestASignatureByTheKeyIsAccepted(t *testing.T) {
pub, priv, _ := ed25519.GenerateKey(nil)
withKey(t, pub)
data := []byte("abc Firefox-VPN-1.2.3-Windows-x64.zip\n")
if err := Verify(data, sign(priv, data)); err != nil {
t.Fatal(err)
}
}
func TestOtherSignaturesAreRefused(t *testing.T) {
pub, priv, _ := ed25519.GenerateKey(nil)
_, other, _ := ed25519.GenerateKey(nil)
withKey(t, pub)
data := []byte("data")
for name, sig := range map[string][]byte{
"another key": sign(other, data),
"other data": sign(priv, []byte("changed")),
"unreadable": []byte("not base64!"),
"empty": nil,
} {
if err := Verify(data, sig); err == nil {
t.Errorf("%s: accepted", name)
}
}
}
func TestABuildWithoutAKeyChecksNothing(t *testing.T) {
_, priv, _ := ed25519.GenerateKey(nil)
withKey(t, nil)
Key = ""
if Available() {
t.Fatal("available without a key")
}
if err := Verify([]byte("x"), sign(priv, []byte("x"))); !errors.Is(err, ErrNoKey) {
t.Fatalf("got %v", err)
}
Key = "broken"
if err := Verify([]byte("x"), sign(priv, []byte("x"))); err == nil || !strings.Contains(err.Error(), "broken") {
t.Fatalf("broken key: %v", err)
}
}
arblant