Form based logins are mainly stateful sessions. In your scenario using stateless sessions would be best.
JWT provide implementation for this. Its basically a key which you need to pass as header in each HTTP request.
So as long as you have the key. API is available.
We can integrate JWT with Spring.
Basically you need to write these logic.
- Generate Key Logic
- Use JWT in Spring Security
- Validate key on each call
I can give you a head start
pom.xml
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.0</version>
</dependency>
TokenHelper.java
Contain useful functions for validating, checking, and parsing Token.
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;
import com.test.dfx.common.TimeProvider;
import com.test.dfx.model.LicenseDetail;
import com.test.dfx.model.User;
@Component
public class TokenHelper {
protected final Log LOGGER = LogFactory.getLog(getClass());
@Value("${app.name}")
private String APP_NAME;
@Value("${jwt.secret}")
public String SECRET; // Secret key used to generate Key. Am getting it from propertyfile
@Value("${jwt.expires_in}")
private int EXPIRES_IN; // can specify time for token to expire.
@Value("${jwt.header}")
private String AUTH_HEADER;
@Autowired
TimeProvider timeProvider;
private SignatureAlgorithm SIGNATURE_ALGORITHM = SignatureAlgorithm.HS512; // JWT Algorithm for encryption
public Date getIssuedAtDateFromToken(String token) {
Date issueAt;
try {
final Claims claims = this.getAllClaimsFromToken(token);
issueAt = claims.getIssuedAt();
} catch (Exception e) {
LOGGER.error("Could not get IssuedDate from passed token");
issueAt = null;
}
return issueAt;
}
public String getAudienceFromToken(String token) {
String audience;
try {
final Claims claims = this.getAllClaimsFromToken(token);
audience = claims.getAudience();
} catch (Exception e) {
LOGGER.error("Could not get Audience from passed token");
audience = null;
}
return audience;
}
public String refreshToken(String token) {
String refreshedToken;
Date a = timeProvider.now();
try {
final Claims claims = this.getAllClaimsFromToken(token);
claims.setIssuedAt(a);
refreshedToken = Jwts.builder()
.setClaims(claims)
.setExpiration(generateExpirationDate())
.signWith( SIGNATURE_ALGORITHM, SECRET )
.compact();
} catch (Exception e) {
LOGGER.error("Could not generate Refresh Token from passed token");
refreshedToken = null;
}
return refreshedToken;
}
public String generateToken(String username) {
String audience = generateAudience();
return Jwts.builder()
.setIssuer( APP_NAME )
.setSubject(username)
.setAudience(audience)
.setIssuedAt(timeProvider.now())
.setExpiration(generateExpirationDate())
.signWith( SIGNATURE_ALGORITHM, SECRET )
.compact();
}
private Claims getAllClaimsFromToken(String token) {
Claims claims;
try {
claims = Jwts.parser()
.setSigningKey(SECRET)
.parseClaimsJws(token)
.getBody();
} catch (Exception e) {
LOGGER.error("Could not get all claims Token from passed token");
claims = null;
}
return claims;
}
private Date generateExpirationDate() {
long expiresIn = EXPIRES_IN;
return new Date(timeProvider.now().getTime() + expiresIn * 1000);
}
public int getExpiredIn() {
return EXPIRES_IN;
}
public Boolean validateToken(String token, UserDetails userDetails) {
User user = (User) userDetails;
final String username = getUsernameFromToken(token);
final Date created = getIssuedAtDateFromToken(token);
return (
username != null &&
username.equals(userDetails.getUsername()) &&
!isCreatedBeforeLastPasswordReset(created, user.getLastPasswordResetDate())
);
}
private Boolean isCreatedBeforeLastPasswordReset(Date created, Date lastPasswordReset) {
return (lastPasswordReset != null && created.before(lastPasswordReset));
}
public String getToken( HttpServletRequest request ) {
/**
* Getting the token from Authentication header
* e.g Bearer your_token
*/
String authHeader = getAuthHeaderFromHeader( request );
if ( authHeader != null && authHeader.startsWith("Bearer ")) {
return authHeader.substring(7);
}
return null;
}
public String getAuthHeaderFromHeader( HttpServletRequest request ) {
return request.getHeader(AUTH_HEADER);
}
}
WebSecurity
SpringSecurity Logic to add JWT check
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.sessionManagement().sessionCreationPolicy( SessionCreationPolicy.STATELESS ).and()
.exceptionHandling().authenticationEntryPoint( restAuthenticationEntryPoint ).and()
.authorizeRequests()
.antMatchers("/auth/**").permitAll()
.antMatchers("/login").permitAll()
.antMatchers("/home").permitAll()
.antMatchers("/actuator/**").permitAll()
.anyRequest().authenticated().and()
.addFilterBefore(new TokenAuthenticationFilter(tokenHelper, jwtUserDetailsService), BasicAuthenticationFilter.class);
http.csrf().disable();
}
TokenAuthenticationFilter.java
Check each Rest Call for valid Token
package com.test.dfx.security;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.web.filter.OncePerRequestFilter;
public class TokenAuthenticationFilter extends OncePerRequestFilter {
protected final Log logger = LogFactory.getLog(getClass());
private TokenHelper tokenHelper;
private UserDetailsService userDetailsService;
public TokenAuthenticationFilter(TokenHelper tokenHelper, UserDetailsService userDetailsService) {
this.tokenHelper = tokenHelper;
this.userDetailsService = userDetailsService;
}
@Override
public void doFilterInternal(
HttpServletRequest request,
HttpServletResponse response,
FilterChain chain
) throws IOException, ServletException {
String username;
String authToken = tokenHelper.getToken(request);
logger.info("AuthToken: "+authToken);
if (authToken != null) {
// get username from token
username = tokenHelper.getUsernameFromToken(authToken);
logger.info("UserName: "+username);
if (username != null) {
// get user
UserDetails userDetails = userDetailsService.loadUserByUsername(username);
if (tokenHelper.validateToken(authToken, userDetails)) {
// create authentication
TokenBasedAuthentication authentication = new TokenBasedAuthentication(userDetails);
authentication.setToken(authToken);
SecurityContextHolder.getContext().setAuthentication(authentication);
}
}else{
logger.error("Something is wrong with Token.");
}
}
chain.doFilter(request, response);
}
}
