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package fs
import (
"bytes"
"os"
"path/filepath"
"testing"
)
func TestRootedPathReadWrite(t *testing.T) {
dir := t.TempDir()
filePath := filepath.Join(dir, "known_hosts")
rootedPath, err := NewRootedPath(filePath)
if err != nil {
t.Fatalf("NewRootedPath failed: %v", err)
}
want := []byte("trusted host\n")
if err := rootedPath.WriteFile(want, 0o600); err != nil {
t.Fatalf("WriteFile failed: %v", err)
}
got, err := rootedPath.ReadFile()
if err != nil {
t.Fatalf("ReadFile failed: %v", err)
}
if !bytes.Equal(got, want) {
t.Fatalf("ReadFile returned %q, want %q", got, want)
}
}
func TestRootedPathReadFileRejectsEscapingSymlink(t *testing.T) {
dir := t.TempDir()
rootDir := filepath.Join(dir, "ssh")
if err := os.MkdirAll(rootDir, 0o755); err != nil {
t.Fatalf("MkdirAll failed: %v", err)
}
outsidePath := filepath.Join(dir, "outside_authorized_keys")
if err := os.WriteFile(outsidePath, []byte("outside\n"), 0o600); err != nil {
t.Fatalf("WriteFile failed: %v", err)
}
linkPath := filepath.Join(rootDir, "authorized_keys")
if err := os.Symlink(filepath.Join("..", "outside_authorized_keys"), linkPath); err != nil {
t.Fatalf("Symlink failed: %v", err)
}
rootedPath, err := NewRootedPath(linkPath)
if err != nil {
t.Fatalf("NewRootedPath failed: %v", err)
}
if _, err := rootedPath.ReadFile(); err == nil {
t.Fatalf("ReadFile succeeded for escaping symlink")
}
}
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