549f9aaf26
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69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
package auth
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import (
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"crypto/rand"
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"encoding/hex"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// Claims JWT claims
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type Claims struct {
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Username string `json:"username"`
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jwt.RegisteredClaims
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}
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// JWTAuth JWT 认证管理器
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type JWTAuth struct {
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secret []byte
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expiration time.Duration
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}
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// NewJWTAuth 创建 JWT 认证管理器
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func NewJWTAuth(secret string, expHours int) *JWTAuth {
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if secret == "" {
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secret = generateSecret()
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}
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return &JWTAuth{
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secret: []byte(secret),
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expiration: time.Duration(expHours) * time.Hour,
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}
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}
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// GenerateToken 生成 JWT token
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func (j *JWTAuth) GenerateToken(username string) (string, error) {
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claims := &Claims{
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Username: username,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(j.expiration)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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Issuer: "gotunnel",
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString(j.secret)
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}
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// ValidateToken 验证 JWT token
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func (j *JWTAuth) ValidateToken(tokenString string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
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return j.secret, nil
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})
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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, jwt.ErrSignatureInvalid
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}
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func generateSecret() string {
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b := make([]byte, 32)
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rand.Read(b)
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return hex.EncodeToString(b)
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}
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