// Copyright (c) Tailscale Inc & AUTHORS // SPDX-License-Identifier: BSD-3-Clause package key import ( "bytes" "encoding/json" "strings" "testing" ) func TestMachineKey(t *testing.T) { k := NewMachine() if k.IsZero() { t.Fatal("MachinePrivate should not be zero") } p := k.Public() if p.IsZero() { t.Fatal("MachinePublic should not be zero") } bs, err := p.MarshalText() if err != nil { t.Fatal(err) } if full, got := string(bs), ":"+p.UntypedHexString(); !strings.HasSuffix(full, got) { t.Fatalf("MachinePublic.UntypedHexString is not a suffix of the typed serialization, got %q want suffix of %q", got, full) } z := MachinePublic{} if !z.IsZero() { t.Fatal("IsZero(MachinePublic{}) is false") } if s := z.ShortString(); s != "" { t.Fatalf("MachinePublic{}.ShortString() is %q, want \"\"", s) } } func TestMachineSerialization(t *testing.T) { serialized := `{ "Priv": "privkey:40ab1b58e9076c7a4d9d07291f5edf9d1aa017eb949624ba683317f48a640369", "Pub":"mkey:50d20b455ecf12bc453f83c2cfdb2a24925d06cf2598dcaa54e91af82ce9f765" }` // Carefully check that the expected serialized data decodes and // reencodes to the expected keys. These types are serialized to // disk all over the place and need to be stable. priv := MachinePrivate{ k: [32]uint8{ 0x40, 0xab, 0x1b, 0x58, 0xe9, 0x7, 0x6c, 0x7a, 0x4d, 0x9d, 0x7, 0x29, 0x1f, 0x5e, 0xdf, 0x9d, 0x1a, 0xa0, 0x17, 0xeb, 0x94, 0x96, 0x24, 0xba, 0x68, 0x33, 0x17, 0xf4, 0x8a, 0x64, 0x3, 0x69, }, } pub := MachinePublic{ k: [32]uint8{ 0x50, 0xd2, 0xb, 0x45, 0x5e, 0xcf, 0x12, 0xbc, 0x45, 0x3f, 0x83, 0xc2, 0xcf, 0xdb, 0x2a, 0x24, 0x92, 0x5d, 0x6, 0xcf, 0x25, 0x98, 0xdc, 0xaa, 0x54, 0xe9, 0x1a, 0xf8, 0x2c, 0xe9, 0xf7, 0x65, }, } type keypair struct { Priv MachinePrivate Pub MachinePublic } var a keypair if err := json.Unmarshal([]byte(serialized), &a); err != nil { t.Fatal(err) } if !a.Priv.Equal(priv) { t.Errorf("wrong deserialization of private key, got %#v want %#v", a.Priv, priv) } if a.Pub != pub { t.Errorf("wrong deserialization of public key, got %#v want %#v", a.Pub, pub) } bs, err := json.MarshalIndent(a, "", " ") if err != nil { t.Fatal(err) } var b bytes.Buffer json.Indent(&b, []byte(serialized), "", " ") if got, want := string(bs), b.String(); got != want { t.Error("json serialization doesn't roundtrip") } } func TestSealViaSharedKey(t *testing.T) { // encrypt a message from a to b a := NewMachine() b := NewMachine() apub, bpub := a.Public(), b.Public() shared := a.SharedKey(bpub) const clear = "the eagle flies at midnight" enc := shared.Seal([]byte(clear)) back, ok := b.OpenFrom(apub, enc) if !ok { t.Fatal("failed to decrypt") } if string(back) != clear { t.Errorf("OpenFrom got %q; want cleartext %q", back, clear) } backShared, ok := shared.Open(enc) if !ok { t.Fatal("failed to decrypt from shared key") } if string(backShared) != clear { t.Errorf("Open got %q; want cleartext %q", back, clear) } }