AI Gateway Go 0.10.0 源码快照 + 旗舰版需求规划报告

M0-M7 已完成:核心网关(身份/RBAC/TOTP/OIDC/SAML/Provider/配额/路由/内容策略/审计/定价)+ 资源市场(MCP/Skills/数字员工)。
含 22 个 PostgreSQL 迁移、管理端/门户端前端源码、OpenAPI 契约、部署 compose。

Co-Authored-By: Claude <noreply@anthropic.com>

internal/platform/cryptox/aesgcm.go

@@ -0,0 +1,77 @@
+package cryptox
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"encoding/base64"
+	"errors"
+	"fmt"
+)
+
+var ErrKeyUnavailable = errors.New("encryption key unavailable")
+
+type AESGCM struct {
+	aead    cipher.AEAD
+	version int
+	purpose string
+}
+
+func NewAESGCM(encodedKey string, version int, purpose string) (*AESGCM, error) {
+	if encodedKey == "" {
+		return nil, nil
+	}
+	key, err := base64.StdEncoding.DecodeString(encodedKey)
+	if err != nil {
+		key, err = base64.RawStdEncoding.DecodeString(encodedKey)
+	}
+	if err != nil || len(key) != 32 {
+		return nil, errors.New("encryption key must be base64-encoded 32 bytes")
+	}
+	if version < 1 || purpose == "" {
+		return nil, errors.New("encryption version and purpose are required")
+	}
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	aead, err := cipher.NewGCM(block)
+	if err != nil {
+		return nil, err
+	}
+	return &AESGCM{aead: aead, version: version, purpose: purpose}, nil
+}
+
+func (c *AESGCM) Encrypt(plaintext []byte) ([]byte, int, error) {
+	if c == nil {
+		return nil, 0, ErrKeyUnavailable
+	}
+	nonce := make([]byte, c.aead.NonceSize())
+	if _, err := rand.Read(nonce); err != nil {
+		return nil, 0, err
+	}
+	ciphertext := c.aead.Seal(nil, nonce, plaintext, c.additionalData())
+	return append(nonce, ciphertext...), c.version, nil
+}
+
+func (c *AESGCM) Decrypt(encrypted []byte, version int) ([]byte, error) {
+	if c == nil {
+		return nil, ErrKeyUnavailable
+	}
+	if version != c.version {
+		return nil, fmt.Errorf("encryption key version %d is not loaded", version)
+	}
+	nonceSize := c.aead.NonceSize()
+	if len(encrypted) <= nonceSize {
+		return nil, errors.New("encrypted value is truncated")
+	}
+	plaintext, err := c.aead.Open(nil, encrypted[:nonceSize], encrypted[nonceSize:], c.additionalData())
+	if err != nil {
+		return nil, errors.New("encrypted value authentication failed")
+	}
+	return plaintext, nil
+}
+
+func (c *AESGCM) additionalData() []byte {
+	return []byte(fmt.Sprintf("ai-gateway/%s/v%d", c.purpose, c.version))
+}