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121 lines
3.2 KiB
121 lines
3.2 KiB
package token
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import (
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"crypto/sha256"
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"encoding/hex"
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"errors"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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var (
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jwtSecret []byte
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accessExpireH = 7 * 24 // 默认 7 天
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refreshExpireH = 30 * 24 // 默认 30 天
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)
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// Init 初始化 JWT 密钥与有效期（main 启动时从配置加载）
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func Init(secret string, accessH, refreshH int) {
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jwtSecret = []byte(secret)
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if accessH > 0 {
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accessExpireH = accessH
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}
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if refreshH > 0 {
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refreshExpireH = refreshH
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}
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}
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// Claims access token 载荷
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type Claims struct {
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UserID int64 `json:"user_id"`
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Username string `json:"username"`
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Roles []string `json:"roles"`
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jwt.RegisteredClaims
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}
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// RefreshClaims refresh token 载荷
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type RefreshClaims struct {
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UserID int64 `json:"user_id"`
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jwt.RegisteredClaims
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}
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// GenerateToken 生成 access + refresh token
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func GenerateToken(userID int64, username string, roles []string) (string, string, error) {
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now := time.Now()
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claims := Claims{
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UserID: userID,
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Username: username,
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Roles: roles,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(now.Add(time.Duration(accessExpireH) * time.Hour)),
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IssuedAt: jwt.NewNumericDate(now),
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NotBefore: jwt.NewNumericDate(now),
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},
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}
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access, err := jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString(jwtSecret)
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if err != nil {
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return "", "", err
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}
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refreshClaims := RefreshClaims{
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UserID: userID,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(now.Add(time.Duration(refreshExpireH) * time.Hour)),
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IssuedAt: jwt.NewNumericDate(now),
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NotBefore: jwt.NewNumericDate(now),
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},
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}
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refresh, err := jwt.NewWithClaims(jwt.SigningMethodHS256, refreshClaims).SignedString(jwtSecret)
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if err != nil {
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return "", "", err
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}
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return access, refresh, nil
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}
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// ParseToken 解析并校验 access token
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func ParseToken(tokenString string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, keyFunc)
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if err != nil {
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return nil, err
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}
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if claims, ok := token.Claims.(*Claims); ok && token.Valid {
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return claims, nil
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}
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return nil, errors.New("invalid token")
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}
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// ParseRefreshToken 解析并校验 refresh token，返回用户 ID
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func ParseRefreshToken(tokenString string) (int64, error) {
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token, err := jwt.ParseWithClaims(tokenString, &RefreshClaims{}, keyFunc)
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if err != nil {
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return 0, err
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}
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if claims, ok := token.Claims.(*RefreshClaims); ok && token.Valid {
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return claims.UserID, nil
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}
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return 0, errors.New("invalid refresh token")
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}
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func keyFunc(t *jwt.Token) (any, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, errors.New("unexpected signing method")
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}
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return jwtSecret, nil
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}
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// GenerateShortID 生成 token 的短摘要，作为 Redis 存储 key 的一部分
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func GenerateShortID(tokenString string) string {
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hash := sha256.Sum256([]byte(tokenString))
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return hex.EncodeToString(hash[:8])
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}
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// AccessExpireSeconds 返回 access token 有效期（秒），用于 Redis TTL
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func AccessExpireSeconds() uint {
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return uint(accessExpireH * 3600)
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}
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// RefreshExpireSeconds 返回 refresh token 有效期（秒），用于 Redis TTL
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func RefreshExpireSeconds() uint {
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return uint(refreshExpireH * 3600)
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}
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