public Authentication getAuthentication(String token) {
Claims claims = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody();
Collection<? extends GrantedAuthority> authorities =
Arrays.stream(claims.get(AUTHORITIES_KEY).toString().split(","))
.map(SimpleGrantedAuthority::new)
.collect(Collectors.toList());
User principal = new User(claims.getSubject(), "", authorities);
return new UsernamePasswordAuthenticationToken(principal, "", authorities);
}
public boolean validateToken(String authToken) {
try {
Jwts.parser().setSigningKey(secretKey).parseClaimsJws(authToken);
return true;
} catch (SignatureException e) {
log.info("Invalid JWT signature: " + e.getMessage());
return false;
}
}
public String createToken(Authentication authentication, Boolean rememberMe) {
String authorities =
authentication
.getAuthorities()
.stream()
.map(GrantedAuthority::getAuthority)
.collect(Collectors.joining(","));
long now = (new Date()).getTime();
Date validity;
if (rememberMe) {
validity = new Date(now + this.tokenValidityInMillisecondsForRememberMe);
} else {
validity = new Date(now + this.tokenValidityInMilliseconds);
}
return Jwts.builder()
.setSubject(authentication.getName())
.claim(AUTHORITIES_KEY, authorities)
.signWith(SignatureAlgorithm.HS512, secretKey)
.setExpiration(validity)
.compact();
}
