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package main
import (
"bytes"
"crypto/ed25519"
"crypto/sha256"
"encoding/hex"
"os"
"path/filepath"
"strings"
"testing"
)
func TestWriteMirrorPrivateKey(t *testing.T) {
t.Parallel()
seed := bytes.Repeat([]byte{0x42}, ed25519.SeedSize)
out := filepath.Join(t.TempDir(), "mirror.key")
fingerprint, err := writeMirrorPrivateKey(out, false, bytes.NewReader(seed))
if err != nil {
t.Fatalf("write key: %v", err)
}
b, err := os.ReadFile(out)
if err != nil {
t.Fatalf("read key file: %v", err)
}
expectedFile := hex.EncodeToString(seed) + "\n"
if string(b) != expectedFile {
t.Fatalf("key file content mismatch: got %q want %q", string(b), expectedFile)
}
pub := ed25519.NewKeyFromSeed(seed).Public().(ed25519.PublicKey)
sum := sha256.Sum256(pub)
expectedFP := "ed25519:" + hex.EncodeToString(sum[:8])
if fingerprint != expectedFP {
t.Fatalf("fingerprint mismatch: got %s want %s", fingerprint, expectedFP)
}
}
func TestWriteMirrorPrivateKey_NoForceRefusesOverwrite(t *testing.T) {
t.Parallel()
out := filepath.Join(t.TempDir(), "mirror.key")
if err := os.WriteFile(out, []byte("existing\n"), 0o600); err != nil {
t.Fatalf("seed existing file: %v", err)
}
_, err := writeMirrorPrivateKey(out, false, bytes.NewReader(bytes.Repeat([]byte{0x01}, ed25519.SeedSize)))
if err == nil {
t.Fatalf("expected overwrite refusal error")
}
if !strings.Contains(err.Error(), "already exists") {
t.Fatalf("unexpected error: %v", err)
}
}
func TestWriteMirrorPrivateKey_ForceOverwrites(t *testing.T) {
t.Parallel()
out := filepath.Join(t.TempDir(), "mirror.key")
if err := os.WriteFile(out, []byte("existing\n"), 0o600); err != nil {
t.Fatalf("seed existing file: %v", err)
}
seed := bytes.Repeat([]byte{0x03}, ed25519.SeedSize)
if _, err := writeMirrorPrivateKey(out, true, bytes.NewReader(seed)); err != nil {
t.Fatalf("force overwrite key: %v", err)
}
b, err := os.ReadFile(out)
if err != nil {
t.Fatalf("read overwritten file: %v", err)
}
expectedFile := hex.EncodeToString(seed) + "\n"
if string(b) != expectedFile {
t.Fatalf("overwritten content mismatch: got %q want %q", string(b), expectedFile)
}
}
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