新增活跃会话管理与通行密钥、钱包登录

internal/service/wallet.go

@@ -0,0 +1,308 @@
+package service
+
+import (
+	"context"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+	"sync"
+	"time"
+
+	"gorm.io/gorm"
+
+	"oci-portal/internal/model"
+)
+
+// 钱包(SIWE)流程错误;api 层映射为用户可读提示。
+var (
+	// ErrWalletNoAppURL 表示面板地址缺失,EIP-4361 的 domain/URI 无从派生。
+	ErrWalletNoAppURL = errors.New("面板地址未设置,请先在「设置 → 安全 → 网络与地址」保存面板地址")
+	// ErrWalletAddress 表示地址格式非法(非 0x+40 hex)。
+	ErrWalletAddress = errors.New("钱包地址格式不正确")
+	// ErrWalletChallenge 表示挑战无效或已过期(一次性消费)。
+	ErrWalletChallenge = errors.New("签名挑战无效或已过期,请重新发起")
+	// ErrWalletSig 表示签名校验失败或恢复地址不匹配;统一文案防探测。
+	ErrWalletSig = errors.New("钱包签名校验失败")
+	// ErrWalletNotBound 表示地址未绑定任何账号,拒绝登录(不开放注册)。
+	ErrWalletNotBound = errors.New("该钱包地址未绑定面板账号,请先登录后在设置中绑定")
+	// ErrWalletBound 表示地址已被绑定(重复绑定)。
+	ErrWalletBound = errors.New("该钱包地址已绑定过")
+)
+
+// walletProvider 是钱包身份在 UserIdentity 表中的 provider 取值。
+const walletProvider = "wallet"
+
+// walletPendingTTL 是签名挑战有效期,与消息中的 Expiration Time 一致。
+const walletPendingTTL = 5 * time.Minute
+
+// walletPending 是一次进行中的签名挑战;nonce 一次性使用。
+type walletPending struct {
+	message  string     // EIP-4361 消息全文,验签对象
+	address  string     // EIP-55 规范地址
+	mode     string     // "login" / "bind"
+	username string     // bind 模式的绑定目标账号
+	token    string     // bind 模式发起时的 Bearer;verify 复验,防被盗令牌撤销后仍完成绑定
+	proof    TokenProof // 发起时的版本/jti 快照;绑定事务行锁下复核,覆盖撤销全部/注销/定点撤销
+	expires  time.Time
+}
+
+// WalletService 承接以太坊钱包(EIP-4361)绑定与登录;身份复用 UserIdentity 通道。
+type WalletService struct {
+	db       *gorm.DB
+	settings *SettingService
+	auth     *AuthService
+
+	mu      sync.Mutex
+	pending map[string]walletPending
+}
+
+// NewWalletService 组装依赖。
+func NewWalletService(db *gorm.DB, settings *SettingService, auth *AuthService) *WalletService {
+	return &WalletService{db: db, settings: settings, auth: auth, pending: map[string]walletPending{}}
+}
+
+// Challenge 生成 EIP-4361 消息全文并登记一次性 nonce;
+// 消息由后端持有并作为最终验签对象,前端仅负责原样签名。
+func (w *WalletService) Challenge(ctx context.Context, address, mode, username, bindToken string) (nonce, message string, err error) {
+	app := w.settings.EffectiveAppURL()
+	if app == "" {
+		return "", "", ErrWalletNoAppURL
+	}
+	addr, err := normalizeEthAddress(address)
+	if err != nil {
+		return "", "", err
+	}
+	var proof TokenProof
+	if mode == "bind" {
+		if proof, err = w.bindTokenProof(ctx, username, bindToken); err != nil {
+			return "", "", err
+		}
+	}
+	nonce, err = randHex(16)
+	if err != nil {
+		return "", "", err
+	}
+	message = buildSiweMessage(app, addr, mode, nonce, time.Now())
+	w.mu.Lock()
+	w.gcWalletLocked()
+	w.pending[nonce] = walletPending{message: message, address: addr, mode: mode, username: username, token: bindToken, proof: proof, expires: time.Now().Add(walletPendingTTL)}
+	w.mu.Unlock()
+	return nonce, message, nil
+}
+
+// bindTokenProof 验证 bind 发起令牌的有效性与归属,返回其版本 / jti 快照;
+// 绑定事务行锁下复核该快照,发起后改密、撤销全部、注销或定点撤销均令绑定作废。
+func (w *WalletService) bindTokenProof(ctx context.Context, username, token string) (TokenProof, error) {
+	name, proof, err := w.auth.ParseTokenProof(ctx, token)
+	if err != nil || name != username {
+		return TokenProof{}, ErrWalletChallenge
+	}
+	return proof, nil
+}
+
+// buildSiweMessage 按 EIP-4361 模板拼装消息;Chain ID 固定 1
+// (personal_sign 与链无关,字段仅为满足标准的人类可读格式)。
+func buildSiweMessage(appURL, address, mode, nonce string, now time.Time) string {
+	domain := appURL
+	if u, err := url.Parse(appURL); err == nil && u.Host != "" {
+		domain = u.Host
+	}
+	statement := "登录 OCI Portal 面板"
+	if mode == "bind" {
+		statement = "将此钱包绑定到 OCI Portal 账号"
+	}
+	return domain + " wants you to sign in with your Ethereum account:\n" +
+		address + "\n\n" +
+		statement + "\n\n" +
+		"URI: " + appURL + "\n" +
+		"Version: 1\n" +
+		"Chain ID: 1\n" +
+		"Nonce: " + nonce + "\n" +
+		"Issued At: " + now.UTC().Format(time.RFC3339) + "\n" +
+		"Expiration Time: " + now.Add(walletPendingTTL).UTC().Format(time.RFC3339)
+}
+
+// gcWalletLocked 清理过期挑战;调用方须持锁。
+func (w *WalletService) gcWalletLocked() {
+	now := time.Now()
+	for k, p := range w.pending {
+		if now.After(p.expires) {
+			delete(w.pending, k)
+		}
+	}
+}
+
+// takeChallenge 取出并消费挑战(一次性);不存在或过期视为无效。
+func (w *WalletService) takeChallenge(nonce string) (walletPending, error) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	p, ok := w.pending[nonce]
+	delete(w.pending, nonce)
+	if !ok || time.Now().After(p.expires) {
+		return walletPending{}, ErrWalletChallenge
+	}
+	return p, nil
+}
+
+// WalletVerifyResult 是校验成功后的会话信息;Mode 在失败时也尽力携带,
+// 供 api 层留痕与决定响应形态。
+type WalletVerifyResult struct {
+	Token     string
+	ExpiresAt time.Time
+	Username  string
+	Mode      string
+}
+
+// Verify 校验签名并完成绑定或登录(落地会话);登录失败按「IP+地址」计入登录守卫,
+// 锁定期内一律 ErrLoginLocked。
+func (w *WalletService) Verify(ctx context.Context, nonce, signature string, meta SessionMeta) (WalletVerifyResult, error) {
+	p, err := w.takeChallenge(nonce)
+	if err != nil {
+		return WalletVerifyResult{}, err
+	}
+	res := WalletVerifyResult{Mode: p.mode}
+	if p.mode == "login" {
+		meta.Method = walletProvider // 绑定不改登录方式,见 OAuth 侧同款注释
+	}
+	key := guardKey(meta.ClientIP, strings.ToLower(p.address))
+	now := time.Now()
+	sec := securityOf(w.auth.settings)
+	if p.mode == "login" && w.auth.guard.locked(key, now, time.Duration(sec.LoginLockMinutes)*time.Minute) {
+		return res, ErrLoginLocked
+	}
+	if err := verifyWalletSig(p, signature); err != nil {
+		if p.mode == "login" {
+			if lockErr := w.auth.failLogin(key, now, p.address, meta.ClientIP, sec); errors.Is(lockErr, ErrLoginLocked) {
+				return res, ErrLoginLocked
+			}
+		}
+		return res, err
+	}
+	if p.mode == "bind" {
+		// 复验发起挑战时的令牌仍有效且归属一致:改密/撤销全部后挑战随之作废
+		if name, tokenErr := w.auth.ParseToken(ctx, p.token); tokenErr != nil || name != p.username {
+			return res, ErrWalletChallenge
+		}
+		res.Username = p.username
+		res.Token, res.ExpiresAt, err = w.bind(ctx, p, meta)
+		return res, err
+	}
+	res.Token, res.ExpiresAt, res.Username, err = w.login(ctx, p, key, meta)
+	return res, err
+}
+
+// verifyWalletSig 验签并比对恢复地址(大小写不敏感);失败统一 ErrWalletSig。
+func verifyWalletSig(p walletPending, signature string) error {
+	raw, err := hex.DecodeString(strings.TrimPrefix(signature, "0x"))
+	if err != nil {
+		return ErrWalletSig
+	}
+	recovered, err := recoverEthAddress(personalSignDigest([]byte(p.message)), raw)
+	if err != nil {
+		return ErrWalletSig
+	}
+	if !strings.EqualFold(recovered, p.address) {
+		return ErrWalletSig
+	}
+	return nil
+}
+
+// bind 在单事务内完成绑定全程:行锁下比对发起时令牌版本(发起后被撤销即作废)、
+// 身份写入、版本递增、原会话行接续换发;任一失败整体回滚,不留半程状态。
+// 新令牌接续 p.token 的会话行(保留登录方式与创建时间),旧令牌无行时按 meta 新建。
+func (w *WalletService) bind(ctx context.Context, p walletPending, meta SessionMeta) (string, time.Time, error) {
+	var token string
+	var expires time.Time
+	err := w.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		user, err := lockUserForAuthChange(tx, p.username)
+		if err != nil {
+			return err
+		}
+		if err := w.auth.ensureTokenCurrentTx(tx, user, p.proof); err != nil {
+			return ErrWalletChallenge
+		}
+		if err := createIdentityTx(tx, user.ID, walletProvider, p.address, shortEthAddress(p.address), ErrWalletBound); err != nil {
+			return err
+		}
+		if err := bumpTokenVersionTx(tx, p.username); err != nil {
+			return err
+		}
+		user.TokenVersion++
+		token, expires, err = w.auth.renewSessionTx(tx, user, p.token, meta)
+		return err
+	})
+	return token, expires, err
+}
+
+// login 查绑定关系并签发 JWT(落地会话);未绑定一律拒绝(不开放注册)。
+func (w *WalletService) login(ctx context.Context, p walletPending, key string, meta SessionMeta) (string, time.Time, string, error) {
+	row, err := w.findWalletIdentity(ctx, p.address)
+	if err != nil {
+		return "", time.Time{}, "", err
+	}
+	token, expires, username, err := w.loginWalletIdentity(ctx, row, p.address, meta)
+	if err == nil {
+		w.auth.guard.success(key)
+	}
+	return token, expires, username, err
+}
+
+func (w *WalletService) loginWalletIdentity(
+	ctx context.Context, row *model.UserIdentity, address string, meta SessionMeta,
+) (string, time.Time, string, error) {
+	var token, username string
+	var expires time.Time
+	err := w.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		user, err := lockUserByIDForAuthChange(tx, row.UserID)
+		if err != nil {
+			return err
+		}
+		if err := identityStillBoundTx(tx, row.ID, user.ID, walletProvider, address); err != nil {
+			if errors.Is(err, ErrOAuthNotBound) {
+				return ErrWalletNotBound
+			}
+			return err
+		}
+		token, expires, err = w.auth.signSessionTokenTx(tx, user, meta)
+		username = user.Username
+		return err
+	})
+	return token, expires, username, err
+}
+
+func (w *WalletService) findWalletIdentity(ctx context.Context, address string) (*model.UserIdentity, error) {
+	var row model.UserIdentity
+	err := w.db.WithContext(ctx).
+		Where("provider = ? AND subject = ?", walletProvider, address).First(&row).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, ErrWalletNotBound
+	}
+	if err != nil {
+		return nil, fmt.Errorf("find wallet identity: %w", err)
+	}
+	return &row, nil
+}
+
+// HasAny 报告是否存在可登录的钱包身份;SIWE 依赖面板地址,缺失时不暴露入口。
+func (w *WalletService) HasAny(ctx context.Context) bool {
+	if w.settings == nil || w.settings.EffectiveAppURL() == "" {
+		return false
+	}
+	var count int64
+	err := w.db.WithContext(ctx).Model(&model.UserIdentity{}).
+		Where("provider = ?", walletProvider).Count(&count).Error
+	if err != nil {
+		return false
+	}
+	return count > 0
+}
+
+// shortEthAddress 生成列表展示用的缩写地址(0x1234…abcd)。
+func shortEthAddress(addr string) string {
+	if len(addr) < 12 {
+		return addr
+	}
+	return addr[:6] + "…" + addr[len(addr)-4:]
+}