55 lines
1.4 KiB
Java
55 lines
1.4 KiB
Java
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package com.example.demo.security;
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import io.jsonwebtoken.Claims;
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import io.jsonwebtoken.Jwts;
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import io.jsonwebtoken.security.Keys;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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import javax.crypto.SecretKey;
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import java.nio.charset.StandardCharsets;
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import java.util.Date;
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import java.util.Map;
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@Component
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public class LearningJwtUtil {
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@Value("${learning.auth.jwt.secret}")
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private String secret;
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@Value("${learning.auth.jwt.expiration:86400000}")
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private long expiration;
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private SecretKey key() {
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return Keys.hmacShaKeyFor(secret.getBytes(StandardCharsets.UTF_8));
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}
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public String generateToken(String username) {
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Date now = new Date();
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return Jwts.builder()
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.claims(Map.of("username", username))
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.subject(username)
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.issuedAt(now)
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.expiration(new Date(now.getTime() + expiration))
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.signWith(key(), Jwts.SIG.HS256)
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.compact();
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}
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public boolean validate(String token) {
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try {
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parse(token);
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return true;
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} catch (Exception e) {
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return false;
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}
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}
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public String username(String token) {
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return parse(token).getSubject();
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}
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private Claims parse(String token) {
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return Jwts.parser().verifyWith(key()).build().parseSignedClaims(token).getPayload();
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}
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}
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