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package com.juick.service.security;
import com.juick.User;
import com.juick.server.SignatureManager;
import com.juick.service.UserService;
import org.apache.commons.io.IOUtils;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.filter.OncePerRequestFilter;
import javax.annotation.Nonnull;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.Map;
import java.util.stream.Collectors;
public class HTTPSignatureAuthenticationFilter extends OncePerRequestFilter {
private final SignatureManager signatureManager;
private final UserService userService;
public HTTPSignatureAuthenticationFilter(
final SignatureManager signatureManager,
final UserService userService) {
this.signatureManager = signatureManager;
this.userService = userService;
}
@Override
protected void doFilterInternal(@Nonnull HttpServletRequest request, @Nonnull HttpServletResponse response, @Nonnull FilterChain filterChain) throws IOException, ServletException {
if (authenticationIsRequired()) {
Map<String, String> headers = Collections.list(request.getHeaderNames())
.stream()
.collect(Collectors.toMap(String::toLowerCase, request::getHeader));
try {
User user = signatureManager.verifySignature(request.getMethod(), request.getRequestURI(), headers);
if (!user.isAnonymous()) {
String userUri = user.getUri().toString();
if (userUri.length() == 0) {
User userWithPassword = userService.getUserByName(user.getName());
userWithPassword.setAuthHash(userService.getHashByUID(userWithPassword.getUid()));
Authentication authentication = new UsernamePasswordAuthenticationToken(userWithPassword.getName(), userWithPassword.getCredentials());
SecurityContextHolder.getContext().setAuthentication(authentication);
} else {
Authentication authentication = new AnonymousAuthenticationToken(userUri, user, Collections.singletonList(new SimpleGrantedAuthority("ROLE_ANONYMOUS")));
SecurityContextHolder.getContext().setAuthentication(authentication);
}
}
} catch (IOException e) {
logger.warn(String.format("Signature %s is not verified, context: %s", headers.get("Signature"),
IOUtils.toString(request.getInputStream(), StandardCharsets.UTF_8)), e);
}
}
filterChain.doFilter(request, response);
}
private boolean authenticationIsRequired() {
Authentication existingAuth = SecurityContextHolder.getContext().getAuthentication();
return existingAuth == null ||
!existingAuth.isAuthenticated() ||
existingAuth instanceof AnonymousAuthenticationToken;
}
}
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