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tokens.go
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tokens.go
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package token
import (
"time"
"github.com/dgrijalva/jwt-go"
"github.com/golanguzb70/simple-post-app/pkg/logger"
)
// JWTHandler ...
type JWTHandler struct {
Sub string
Exp string
Iat string
Aud []string
Role string
SigninKey string
Log *logger.Logger
Token string
Timout int
}
type CustomClaims struct {
*jwt.Token
Sub string `json:"sub"`
Exp float64 `json:"exp"`
Iat float64 `json:"iat"`
Aud []string `json:"aud"`
Role string `json:"role"`
}
// GenerateAuthJWT ...
func (jwtHandler *JWTHandler) GenerateAuthJWT() (access, refresh string, err error) {
var (
accessToken *jwt.Token
refreshToken *jwt.Token
claims jwt.MapClaims
rtClaims jwt.MapClaims
)
accessToken = jwt.New(jwt.SigningMethodHS256)
refreshToken = jwt.New(jwt.SigningMethodHS256)
claims = accessToken.Claims.(jwt.MapClaims)
claims["sub"] = jwtHandler.Sub
claims["exp"] = time.Now().Add(time.Minute * time.Duration(jwtHandler.Timout)).Unix()
claims["iat"] = time.Now().Unix()
claims["role"] = jwtHandler.Role
claims["aud"] = jwtHandler.Aud
access, err = accessToken.SignedString([]byte(jwtHandler.SigninKey))
if err != nil {
jwtHandler.Log.Error("error generating access token", err)
return
}
rtClaims = refreshToken.Claims.(jwt.MapClaims)
rtClaims["sub"] = jwtHandler.Sub
refresh, err = refreshToken.SignedString([]byte(jwtHandler.SigninKey))
if err != nil {
jwtHandler.Log.Error("error generating refresh token", err)
return
}
return
}
// ExtractClaims ...
func (jwtHandler *JWTHandler) ExtractClaims() (jwt.MapClaims, error) {
var (
token *jwt.Token
err error
)
token, err = jwt.Parse(jwtHandler.Token, func(t *jwt.Token) (interface{}, error) {
return []byte(jwtHandler.SigninKey), nil
})
if err != nil {
return nil, err
}
claims, ok := token.Claims.(jwt.MapClaims)
if !(ok && token.Valid) {
jwtHandler.Log.Error("invalid jwt token")
return nil, err
}
return claims, nil
}
// ExtractClaim extracts claims from given token
func ExtractClaim(tokenStr string, signinigKey []byte) (jwt.MapClaims, error) {
var (
token *jwt.Token
err error
)
token, err = jwt.Parse(tokenStr, func(token *jwt.Token) (interface{}, error) {
// check token signing method etc
return signinigKey, nil
})
if err != nil {
return nil, err
}
claims, ok := token.Claims.(jwt.MapClaims)
if !(ok && token.Valid) {
return nil, err
}
return claims, nil
}