feat: 完整游戏运维功能

platform/service/secret_envelope.go

@@ -0,0 +1,98 @@
+package service
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base64"
+	"strings"
+)
+
+const developmentSecretEnvelopeKey = "browser.local/platform/development-secret-envelope/v1"
+
+type SecretEnvelope interface {
+	Seal(string) (string, error)
+	Open(string) (string, error)
+}
+
+type aesGCMSecretEnvelope struct {
+	key [32]byte
+}
+
+func newSecretEnvelope(secret string) *aesGCMSecretEnvelope {
+	return &aesGCMSecretEnvelope{key: sha256.Sum256([]byte(secret))}
+}
+
+func (envelope *aesGCMSecretEnvelope) Seal(plain string) (string, error) {
+	block, err := aes.NewCipher(envelope.key[:])
+	if err != nil {
+		return "", err
+	}
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return "", err
+	}
+	nonce := make([]byte, gcm.NonceSize())
+	if _, err := rand.Read(nonce); err != nil {
+		return "", err
+	}
+	ciphertext := gcm.Seal(nil, nonce, []byte(plain), nil)
+	return "enc:v1:" + base64.RawURLEncoding.EncodeToString(nonce) + ":" + base64.RawURLEncoding.EncodeToString(ciphertext), nil
+}
+
+func (envelope *aesGCMSecretEnvelope) Open(encrypted string) (string, error) {
+	parts := strings.Split(encrypted, ":")
+	if len(parts) != 4 || parts[0] != "enc" || parts[1] != "v1" {
+		return "", validationError("encrypted key format is invalid")
+	}
+	nonce, err := base64.RawURLEncoding.DecodeString(parts[2])
+	if err != nil {
+		return "", err
+	}
+	ciphertext, err := base64.RawURLEncoding.DecodeString(parts[3])
+	if err != nil {
+		return "", err
+	}
+	block, err := aes.NewCipher(envelope.key[:])
+	if err != nil {
+		return "", err
+	}
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		return "", err
+	}
+	plain, err := gcm.Open(nil, nonce, ciphertext, nil)
+	if err != nil {
+		return "", err
+	}
+	return string(plain), nil
+}
+
+func (svc *CoreService) ConfigureSecretEnvelopeKey(secret string) error {
+	secret = strings.TrimSpace(secret)
+	if secret == "" {
+		return nil
+	}
+	if len([]rune(secret)) < 32 {
+		return validationError("PLATFORM_SECRET_ENVELOPE_KEY must be at least 32 characters")
+	}
+	svc.secretEnvelope = newSecretEnvelope(secret)
+	return nil
+}
+
+func (svc *CoreService) encryptRuntimeKey(plain string) (string, error) {
+	return svc.secretEnvelope.Seal(plain)
+}
+
+func (svc *CoreService) decryptRuntimeKey(encrypted string) (string, error) {
+	return svc.secretEnvelope.Open(encrypted)
+}
+
+func encryptRuntimeKey(plain string) (string, error) {
+	return newSecretEnvelope(developmentSecretEnvelopeKey).Seal(plain)
+}
+
+func decryptRuntimeKey(encrypted string) (string, error) {
+	return newSecretEnvelope(developmentSecretEnvelopeKey).Open(encrypted)
+}