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Configuration error
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package com.example.app.services;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.function.Function;
import javax.crypto.SecretKey;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Service;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.io.Decoders;
import io.jsonwebtoken.security.Keys;
import lombok.Getter;
@Getter
@Service
public class JwtService {
@Value("${SECRET}")
private String SECRET;
public String generateToken(String username) {
Map<String, Object> claims = new HashMap<>();
return generateToken(claims, username);
}
private String generateToken(Map<String, Object> claims, String username) {
return Jwts
.builder()
.claims(claims)
.subject(username)
.issuedAt(new Date())
.expiration(new Date(System.currentTimeMillis() + 1000 * 60 * 30))
.signWith(getSignKey())
.compact();
}
private SecretKey getSignKey() {
byte[] keyBytes = Decoders.BASE64.decode(SECRET);
return Keys.hmacShaKeyFor(keyBytes);
}
public Optional<String> extractUsername(String token) {
return extractClaim(token, Claims::getSubject);
}
public Optional<Date> extractExpiration(String token) {
return extractClaim(token, Claims::getExpiration);
}
public <T> Optional<T> extractClaim(String token, Function<Claims, T> claimResolver) {
final Claims claims = extractAllClaims(token);
return Optional.ofNullable(claimResolver.apply(claims));
}
private Claims extractAllClaims(String token) {
return Jwts
.parser()
.verifyWith(getSignKey())
.build()
.parseSignedClaims(token)
.getPayload();
}
private boolean isTokenExpired(String token) {
return extractExpiration(token).map(x -> x.before(new Date())).orElse(false);
}
public boolean validateToken(String token, UserDetails user) {
return extractUsername(token).map(x -> x.equals(user.getUsername())).orElse(false) && !isTokenExpired(token);
}
}
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