SpringCloudBase/zen-api/src/main/kotlin/cn/gygxzc/envir/config/jwt/JwtUtils.kt

package cn.gygxzc.envir.config.jwt

import io.jsonwebtoken.Jwts
import io.jsonwebtoken.SignatureAlgorithm
import java.security.Key
import java.util.*

/**
 * Created by niantuo on 2018/9/21.
 * 签发jwt方法，
 */

object JwtUtils {


    /**
     * 暂时如此，后期可以考虑ip，域名这些加强验证
     */
    fun sign(payload: JwtPayload, jwtConfig: JwtConfig): String {
        val calendar = Calendar.getInstance(Locale.CANADA)
        calendar.add(Calendar.HOUR_OF_DAY, jwtConfig.expired.toHours().toInt())
        return Jwts.builder()
                .setId(payload.id)
                .setSubject(payload.username)
                .setExpiration(calendar.time)
                .signWith(jwtConfig.key,SignatureAlgorithm.HS256)
                .compact()
    }


    /**
     * 解析出放进去的结果
     */
    @Throws(Exception::class)
    fun parseJwt(key: Key, jwtToken: String): JwtPayload {
        val parser = Jwts.parser()
                .setSigningKey(key)
                .parseClaimsJws(jwtToken)
        val id = parser.body.id
        val username = parser.body.subject
        return JwtPayload(id, username)
    }


}