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src/main/java/stirling/software/SPDF/config/security/CustomAuthenticationFailureHandler.java

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+package stirling.software.SPDF.config.security;
+
+import java.io.IOException;
+
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
+
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.security.authentication.BadCredentialsException;
+import org.springframework.security.authentication.LockedException;
+
+public class CustomAuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {
+
+    @Override
+    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) 
+      throws IOException, ServletException {
+        if (exception.getClass().isAssignableFrom(BadCredentialsException.class)) {
+        	setDefaultFailureUrl("/login?error=badcredentials");
+        } else if (exception.getClass().isAssignableFrom(LockedException.class)) {
+        	setDefaultFailureUrl("/login?error=locked");
+        }
+        super.onAuthenticationFailure(request, response, exception);
+    }
+}

src/main/java/stirling/software/SPDF/config/security/CustomUserDetailsService.java

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+package stirling.software.SPDF.config.security;
+
+import java.util.Collection;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Service;
+
+import stirling.software.SPDF.model.Authority;
+import stirling.software.SPDF.model.User;
+import stirling.software.SPDF.repository.UserRepository;
+
+@Service
+public class CustomUserDetailsService implements UserDetailsService {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        User user = userRepository.findByUsername(username)
+            .orElseThrow(() -> new UsernameNotFoundException("No user found with username: " + username));
+
+        return new org.springframework.security.core.userdetails.User(
+            user.getUsername(),
+            user.getPassword(),
+            user.isEnabled(),
+            true, true, true,
+            getAuthorities(user.getAuthorities())
+        );
+    }
+
+    private Collection<? extends GrantedAuthority> getAuthorities(Set<Authority> authorities) {
+        return authorities.stream()
+            .map(authority -> new SimpleGrantedAuthority(authority.getAuthority()))
+            .collect(Collectors.toList());
+    }
+}

src/main/java/stirling/software/SPDF/config/security/SecurityConfiguration.java

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+package stirling.software.SPDF.config.security;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+
+@Configuration
+public class SecurityConfiguration {
+
+    @Autowired
+    private UserDetailsService userDetailsService;
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+
+    @Autowired
+    @Qualifier("loginEnabled")
+    public boolean loginEnabledValue;
+    
+    @Bean
+    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception  {
+    	if(loginEnabledValue) {
+	    	http.csrf().disable();
+	        http
+	            .formLogin(formLogin -> formLogin
+	                .loginPage("/login")
+	                .defaultSuccessUrl("/")
+	                .failureHandler(new CustomAuthenticationFailureHandler())
+	                .permitAll()
+	            )
+	            .logout(logout -> logout
+	            		.logoutRequestMatcher(new AntPathRequestMatcher("/logout"))
+	                    .logoutSuccessUrl("/login?logout=true")
+	                    .invalidateHttpSession(true)        // Invalidate session
+	                    .deleteCookies("JSESSIONID") 
+	            )
+	            .authorizeHttpRequests(authz -> authz
+	                    .requestMatchers(req -> req.getRequestURI().startsWith("/login") || req.getRequestURI().endsWith(".svg") || req.getRequestURI().startsWith("/register") || req.getRequestURI().startsWith("/error") || req.getRequestURI().startsWith("/images/") ||  req.getRequestURI().startsWith("/public/") || req.getRequestURI().startsWith("/css/") || req.getRequestURI().startsWith("/js/"))
+	                    .permitAll()
+	                    .anyRequest().authenticated()
+	                )
+	            .userDetailsService(userDetailsService)
+	            .authenticationProvider(authenticationProvider());
+    	} else {
+    		 http
+             .csrf().disable()
+             .authorizeHttpRequests(authz -> authz
+                 .anyRequest().permitAll()
+             );
+    	}
+        return http.build();
+    }
+
+
+    
+    @Bean
+    public DaoAuthenticationProvider authenticationProvider() {
+        DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
+        authProvider.setUserDetailsService(userDetailsService);
+        authProvider.setPasswordEncoder(passwordEncoder());
+        return authProvider;
+    }
+    
+}
+

src/main/java/stirling/software/SPDF/config/security/UserService.java

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+package stirling.software.SPDF.config.security;
+
+import java.util.Map;
+import java.util.Optional;
+import java.util.HashMap;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+
+import stirling.software.SPDF.repository.UserRepository;
+import stirling.software.SPDF.model.Authority;
+import stirling.software.SPDF.model.Role;
+import stirling.software.SPDF.model.User;
+@Service
+public class UserService {
+    
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private PasswordEncoder passwordEncoder;
+
+    public void saveUser(String username, String password) {
+        User user = new User();
+        user.setUsername(username);
+        user.setPassword(passwordEncoder.encode(password));
+        user.setEnabled(true);
+        userRepository.save(user);
+    }
+
+    public void saveUser(String username, String password, String role) {
+        User user = new User();
+        user.setUsername(username);
+        user.setPassword(passwordEncoder.encode(password));
+        user.addAuthority(new Authority(role, user));
+        user.setEnabled(true);
+        userRepository.save(user);
+    }
+    
+    public void deleteUser(String username) {
+    	 Optional<User> userOpt = userRepository.findByUsername(username);
+         if (userOpt.isPresent()) {
+        	 userRepository.delete(userOpt.get());
+         }
+    }
+    
+    public boolean usernameExists(String username) {
+        return userRepository.findByUsername(username) != null;
+    }
+    
+    public boolean hasUsers() {
+        return userRepository.count() > 0;
+    }
+    
+    public void updateUserSettings(String username, Map<String, String> updates) {
+        Optional<User> userOpt = userRepository.findByUsername(username);
+        if (userOpt.isPresent()) {
+            User user = userOpt.get();
+            Map<String, String> settingsMap = user.getSettings();
+
+            if(settingsMap == null) {
+                settingsMap = new HashMap<String,String>();
+            } 
+            settingsMap.clear();
+            settingsMap.putAll(updates);
+            user.setSettings(settingsMap);
+
+            userRepository.save(user);
+        } 
+    }
+
+    
+}