Vladimir Zagainov
070b5c0262
- config: OS-specific paths, launcher.json load/save, DefaultSettings with MRIXSCRAFT_SERVER_URL env override - auth: Yggdrasil client (authenticate, refresh, validate), session persistence in session.json, EnsureValid flow - fetcher: HTTP download with SHA-1 verification, WorkerPool for concurrent downloads - java: JRE detection (IsInstalled/Find), platform-specific executable name - utils: SHA1File, SHA1Bytes, Unzip with zip-slip protection - cmd/launcher: wire config + auth into main, session restore on startup Co-Authored-By: OWL <noreply@anthropic.com>
82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
// package utils provides shared utility functions.
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package utils
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import (
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"archive/zip"
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"crypto/sha1"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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// SHA1File computes the SHA-1 hex digest of the file at path.
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func SHA1File(path string) (string, error) {
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f, err := os.Open(path)
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if err != nil {
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return "", fmt.Errorf("opening %s: %w", path, err)
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}
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defer f.Close()
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h := sha1.New()
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if _, err := io.Copy(h, f); err != nil {
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return "", fmt.Errorf("hashing %s: %w", path, err)
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}
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return fmt.Sprintf("%x", h.Sum(nil)), nil
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}
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// SHA1Bytes returns the SHA-1 hex digest of data.
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func SHA1Bytes(data []byte) string {
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return fmt.Sprintf("%x", sha1.Sum(data))
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}
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// Unzip extracts a zip archive into dest, preserving the directory structure.
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func Unzip(src, dest string) error {
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r, err := zip.OpenReader(src)
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if err != nil {
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return fmt.Errorf("opening zip %s: %w", src, err)
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}
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defer r.Close()
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for _, f := range r.File {
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target := filepath.Join(dest, f.Name)
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// Prevent zip-slip.
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if !strings.HasPrefix(target, filepath.Clean(dest)+string(os.PathSeparator)) {
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return fmt.Errorf("illegal zip path: %s", f.Name)
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}
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if f.FileInfo().IsDir() {
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if err := os.MkdirAll(target, f.Mode()); err != nil {
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return fmt.Errorf("creating directory %s: %w", target, err)
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}
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continue
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}
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if err := os.MkdirAll(filepath.Dir(target), 0o755); err != nil {
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return fmt.Errorf("creating parent for %s: %w", target, err)
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}
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out, err := os.OpenFile(target, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
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if err != nil {
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return fmt.Errorf("creating file %s: %w", target, err)
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}
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rc, err := f.Open()
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if err != nil {
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out.Close()
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return fmt.Errorf("reading zip entry %s: %w", f.Name, err)
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}
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if _, err := io.Copy(out, rc); err != nil {
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rc.Close()
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out.Close()
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return fmt.Errorf("extracting %s: %w", f.Name, err)
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}
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rc.Close()
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out.Close()
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}
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return nil
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}
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