333 lines
8.7 KiB
Go
333 lines
8.7 KiB
Go
// Package logic is the auth application use-case layer (JWT, login, denylist).
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package logic
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import (
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"context"
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"strconv"
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"strings"
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"time"
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"github.com/golang-jwt/jwt/v5"
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authentity "spark-server/internal/module/auth/entity"
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"spark-server/internal/pkg/errs"
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"spark-server/internal/pkg/reqctx"
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)
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// Service validates an access token. HTTP middleware and TCP AUTH share this.
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type Service interface {
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Authenticate(ctx context.Context, token string) (*authentity.Principal, error)
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}
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// Issuer mints, refreshes, and revokes access tokens.
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type Issuer interface {
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Issue(ctx context.Context, userID int64, deviceID uint64) (*authentity.IssuedToken, error)
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Refresh(ctx context.Context, refreshToken string) (*authentity.IssuedToken, error)
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Logout(ctx context.Context, userID int64, deviceID uint64, accessJTI string, accessExp time.Time) error
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LogoutAll(ctx context.Context, userID int64) error
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Revoke(ctx context.Context, token string) error
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}
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// TokenService is JWT: authenticate, issue, and revoke.
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type TokenService interface {
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Service
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Issuer
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}
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const (
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defaultIssuer = "spark-im"
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defaultTTL = 7 * 24 * time.Hour
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defaultRefreshTTL = 30 * 24 * time.Hour
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)
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// Options configure HS256 JWT issuance and validation.
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type Options struct {
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Secret string
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Issuer string
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TTL time.Duration
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RefreshTTL time.Duration
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Denylist Denylist
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Pairs PairStore
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Clock func() time.Time
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}
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type claims struct {
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DeviceID uint64 `json:"did"`
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Use string `json:"use,omitempty"`
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jwt.RegisteredClaims
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}
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// JWT implements TokenService with HS256 and an optional jti denylist.
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type JWT struct {
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secret []byte
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issuer string
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ttl time.Duration
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refreshTTL time.Duration
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denylist Denylist
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pairs PairStore
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clock func() time.Time
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}
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func NewJWT(opt *Options) (*JWT, error) {
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if opt == nil || strings.TrimSpace(opt.Secret) == "" {
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return nil, errs.ErrInner.WithInnerMsg("jwt: secret is required")
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}
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issuer := opt.Issuer
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if issuer == "" {
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issuer = defaultIssuer
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}
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ttl := opt.TTL
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if ttl <= 0 {
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ttl = defaultTTL
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}
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refreshTTL := opt.RefreshTTL
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if refreshTTL <= 0 {
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refreshTTL = defaultRefreshTTL
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}
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dl := opt.Denylist
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if dl == nil {
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dl = NewMemoryDenylist()
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}
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pairs := opt.Pairs
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if pairs == nil {
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pairs = NewMemoryPairs()
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}
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clock := opt.Clock
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if clock == nil {
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clock = time.Now
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}
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return &JWT{
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secret: []byte(opt.Secret),
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issuer: issuer,
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ttl: ttl,
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refreshTTL: refreshTTL,
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denylist: dl,
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pairs: pairs,
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clock: clock,
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}, nil
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}
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func (j *JWT) Issue(ctx context.Context, userID int64, deviceID uint64) (*authentity.IssuedToken, error) {
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if err := ctx.Err(); err != nil {
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return nil, errs.FromRPCError("jwt", err)
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}
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if userID <= 0 || deviceID == 0 {
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return nil, errs.ErrInvalidArgument
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}
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access, err := j.sign(userID, deviceID, tokenUseAccess, j.ttl)
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if err != nil {
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return nil, err
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}
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refresh, err := j.sign(userID, deviceID, tokenUseRefresh, j.refreshTTL)
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if err != nil {
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return nil, err
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}
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if err := j.replacePair(ctx, userID, deviceID, access.jti, refresh.jti); err != nil {
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return nil, err
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}
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return &authentity.IssuedToken{
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AccessToken: access.raw,
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RefreshToken: refresh.raw,
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ExpiresIn: int64(j.ttl / time.Second),
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RefreshExpiresIn: int64(j.refreshTTL / time.Second),
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UserID: userID,
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DeviceID: deviceID,
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}, nil
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}
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type signedToken struct {
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raw string
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jti string
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}
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func (j *JWT) sign(userID int64, deviceID uint64, use string, ttl time.Duration) (signedToken, error) {
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now := j.clock()
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jti := reqctx.NewID()
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tok := jwt.NewWithClaims(jwt.SigningMethodHS256, &claims{
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DeviceID: deviceID,
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Use: use,
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RegisteredClaims: jwt.RegisteredClaims{
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Subject: strconv.FormatInt(userID, 10),
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Issuer: j.issuer,
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IssuedAt: jwt.NewNumericDate(now),
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ExpiresAt: jwt.NewNumericDate(now.Add(ttl)),
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ID: jti,
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},
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})
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raw, err := tok.SignedString(j.secret)
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if err != nil {
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return signedToken{}, errs.ErrInner.WithError("jwt", err)
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}
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return signedToken{raw: raw, jti: jti}, nil
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}
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func (j *JWT) replacePair(ctx context.Context, userID int64, deviceID uint64, accessJTI, refreshJTI string) error {
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old, err := j.pairs.Get(ctx, userID, deviceID)
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if err != nil {
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return errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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if old.Access != "" {
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_ = j.denylist.Add(ctx, old.Access, j.ttl)
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}
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if old.Refresh != "" {
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_ = j.denylist.Add(ctx, old.Refresh, j.refreshTTL)
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}
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if err := j.pairs.Put(ctx, userID, deviceID, TokenPair{Access: accessJTI, Refresh: refreshJTI}, j.refreshTTL); err != nil {
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return errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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return nil
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}
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func (j *JWT) Refresh(ctx context.Context, refreshToken string) (*authentity.IssuedToken, error) {
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c, err := j.parse(refreshToken, false)
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if err != nil {
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return nil, err
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}
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if c.Use != tokenUseRefresh {
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return nil, errs.ErrUnauthorized
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}
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denied, err := j.denylist.Has(ctx, c.ID)
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if err != nil {
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return nil, errs.ErrAvailable.WithError("jwt-denylist", err)
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}
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if denied {
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return nil, errs.ErrUnauthorized
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}
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uid, err := strconv.ParseInt(c.Subject, 10, 64)
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if err != nil || uid <= 0 || c.DeviceID == 0 {
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return nil, errs.ErrUnauthorized
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}
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stored, err := j.pairs.Get(ctx, uid, c.DeviceID)
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if err != nil {
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return nil, errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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if stored.Refresh == "" || stored.Refresh != c.ID {
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return nil, errs.ErrUnauthorized
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}
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return j.Issue(ctx, uid, c.DeviceID)
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}
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func (j *JWT) Logout(ctx context.Context, userID int64, deviceID uint64, accessJTI string, accessExp time.Time) error {
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if accessJTI != "" {
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remain := accessExp.Sub(j.clock())
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if remain > 0 {
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if err := j.denylist.Add(ctx, accessJTI, remain); err != nil {
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return errs.ErrAvailable.WithError("jwt-denylist", err)
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}
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}
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}
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old, err := j.pairs.Get(ctx, userID, deviceID)
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if err != nil {
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return errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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if old.Access != "" && old.Access != accessJTI {
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_ = j.denylist.Add(ctx, old.Access, j.ttl)
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}
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if old.Refresh != "" {
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_ = j.denylist.Add(ctx, old.Refresh, j.refreshTTL)
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}
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if err := j.pairs.Delete(ctx, userID, deviceID); err != nil {
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return errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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return nil
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}
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func (j *JWT) LogoutAll(ctx context.Context, userID int64) error {
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if userID <= 0 {
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return errs.ErrInvalidArgument
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}
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rows, err := j.pairs.ListByUser(ctx, userID)
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if err != nil {
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return errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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for i := range rows {
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row := rows[i]
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if row.Pair.Access != "" {
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_ = j.denylist.Add(ctx, row.Pair.Access, j.ttl)
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}
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if row.Pair.Refresh != "" {
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_ = j.denylist.Add(ctx, row.Pair.Refresh, j.refreshTTL)
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}
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if err := j.pairs.Delete(ctx, userID, row.DeviceID); err != nil {
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return errs.ErrAvailable.WithError("jwt-refresh", err)
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}
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}
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return nil
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}
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func (j *JWT) Authenticate(ctx context.Context, token string) (*authentity.Principal, error) {
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c, err := j.parse(token, false)
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if err != nil {
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return nil, err
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}
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denied, err := j.denylist.Has(ctx, c.ID)
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if err != nil {
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return nil, errs.ErrAvailable.WithError("jwt-denylist", err)
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}
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if denied {
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return nil, errs.ErrUnauthorized
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}
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if c.Use != "" && c.Use != tokenUseAccess {
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return nil, errs.ErrUnauthorized
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}
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uid, err := strconv.ParseInt(c.Subject, 10, 64)
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if err != nil || uid <= 0 || c.DeviceID == 0 {
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return nil, errs.ErrUnauthorized
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}
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exp := time.Time{}
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if c.ExpiresAt != nil {
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exp = c.ExpiresAt.Time
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}
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return &authentity.Principal{UserID: uid, DeviceID: c.DeviceID, JTI: c.ID, ExpiresAt: exp}, nil
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}
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func (j *JWT) Revoke(ctx context.Context, token string) error {
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c, err := j.parse(token, true)
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if err != nil {
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return err
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}
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if c.ExpiresAt == nil {
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return nil
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}
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remain := c.ExpiresAt.Time.Sub(j.clock())
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if remain <= 0 {
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return nil
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}
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if err := j.denylist.Add(ctx, c.ID, remain); err != nil {
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return errs.ErrAvailable.WithError("jwt-denylist", err)
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}
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return nil
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}
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func (j *JWT) parse(token string, allowExpired bool) (*claims, error) {
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if token == "" {
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return nil, errs.ErrUnauthorized
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}
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opts := []jwt.ParserOption{
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jwt.WithValidMethods([]string{jwt.SigningMethodHS256.Alg()}),
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jwt.WithTimeFunc(j.clock),
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}
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if allowExpired {
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opts = append(opts, jwt.WithoutClaimsValidation())
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} else {
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opts = append(opts, jwt.WithIssuer(j.issuer), jwt.WithIssuedAt(), jwt.WithExpirationRequired())
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}
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parsed, err := jwt.ParseWithClaims(token, &claims{}, func(t *jwt.Token) (any, error) {
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if t.Method != jwt.SigningMethodHS256 {
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return nil, jwt.ErrSignatureInvalid
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}
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return j.secret, nil
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}, opts...)
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if err != nil || parsed == nil || !parsed.Valid {
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return nil, errs.ErrUnauthorized
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}
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c, ok := parsed.Claims.(*claims)
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if !ok || c.ID == "" {
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return nil, errs.ErrUnauthorized
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}
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if allowExpired && c.Issuer != j.issuer {
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return nil, errs.ErrUnauthorized
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}
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return c, nil
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}
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