smail
f60d3b0880
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统一 frontend、backend、test、test-log 和 out 目录，更新构建、部署及测试入口；纳入配置管理兼容与首次安全引导修复；排除本机配置、密钥和测试产物。
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
package config
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/x509"
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"encoding/pem"
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"errors"
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"os"
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"path/filepath"
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"git.pcux.cn/xuans/Smail/utils/atomicfile"
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)
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const maxACMEPrivateKeySize = 16 << 10
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func loadOrCreateACMEPrivateKey(directory, name string) (*ecdsa.PrivateKey, bool, error) {
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if filepath.Base(name) != name || name == "." || name == "" {
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return nil, false, errors.New("invalid ACME private key path")
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}
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if err := ensureSecureACMEDirectory(directory); err != nil {
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return nil, false, err
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}
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root, err := os.OpenRoot(directory)
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if err != nil {
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return nil, false, err
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}
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defer root.Close()
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info, statErr := root.Lstat(name)
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if statErr == nil {
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if info.Mode()&os.ModeSymlink != 0 || !info.Mode().IsRegular() {
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return nil, false, errors.New("invalid ACME private key file")
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}
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if info.Size() > 0 && info.Size() <= maxACMEPrivateKeySize {
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data, readErr := root.ReadFile(name)
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if readErr != nil {
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return nil, false, readErr
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}
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if privateKey, parseErr := parseACMEPrivateKey(data); parseErr == nil {
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if err := root.Chmod(name, 0600); err != nil {
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return nil, false, err
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}
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return privateKey, false, nil
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}
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}
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} else if !os.IsNotExist(statErr) {
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return nil, false, statErr
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}
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privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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return nil, false, err
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}
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encoded, err := x509.MarshalECPrivateKey(privateKey)
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if err != nil {
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return nil, false, err
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}
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privatePEM := pem.EncodeToMemory(&pem.Block{Type: "EC PRIVATE KEY", Bytes: encoded})
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if len(privatePEM) == 0 {
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return nil, false, errors.New("ACME private key encoding failed")
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}
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if err := atomicfile.WriteRoot(root, name, privatePEM, 0600); err != nil {
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return nil, false, err
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}
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return privateKey, true, nil
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}
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func ensureSecureACMEDirectory(directory string) error {
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if err := os.MkdirAll(directory, 0700); err != nil {
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return err
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}
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info, err := os.Lstat(directory)
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if err != nil {
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return err
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}
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if info.Mode()&os.ModeSymlink != 0 || !info.IsDir() {
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return errors.New("invalid ACME private key directory")
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}
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// #nosec G302 -- ACME 账户私钥目录只允许当前服务账户访问。
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return os.Chmod(directory, 0700)
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}
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func parseACMEPrivateKey(data []byte) (*ecdsa.PrivateKey, error) {
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block, rest := pem.Decode(data)
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if block == nil || block.Type != "EC PRIVATE KEY" || len(bytes.TrimSpace(rest)) != 0 {
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return nil, errors.New("invalid ACME private key")
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}
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privateKey, err := x509.ParseECPrivateKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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if privateKey.Curve == nil || privateKey.Curve.Params().Name != elliptic.P256().Params().Name {
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return nil, errors.New("invalid ACME private key curve")
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}
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return privateKey, nil
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}
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