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token.go
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token.go
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package security
import (
"errors"
"strings"
"time"
"github.com/dgrijalva/jwt-go"
)
// GenerateJWT ...
func GenerateJWT(m map[string]interface{}, tokenExpireTime time.Duration, tokenSecretKey string) (tokenString string, err error) {
var (
token *jwt.Token
)
token = jwt.New(jwt.SigningMethodHS256)
claims := token.Claims.(jwt.MapClaims)
for key, value := range m {
claims[key] = value
}
claims["iat"] = time.Now().Unix()
claims["exp"] = time.Now().Add(tokenExpireTime).Unix()
tokenString, err = token.SignedString([]byte(tokenSecretKey))
if err != nil {
return "", err
}
return tokenString, nil
}
// ExtractClaims extracts claims from given token
func ExtractClaims(tokenString string, tokenSecretKey string) (jwt.MapClaims, error) {
var (
token *jwt.Token
err error
)
token, err = jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
// check token signing method etc
return []byte(tokenSecretKey), nil
})
if err != nil {
return nil, err
}
claims, ok := token.Claims.(jwt.MapClaims)
if !(ok && token.Valid) {
return nil, errors.New("invalid token")
}
return claims, nil
}
// ExtractToken checks and returns token part of input string
func ExtractToken(bearer string) (token string, err error) {
strArr := strings.Split(bearer, " ")
if len(strArr) == 2 {
return strArr[1], nil
}
return token, errors.New("wrong token format")
}