Initial commit with basic CRUD functionality:

* GET all properties
* GET one property by id
* CREATE one property
* DELETE one property by id

src/main/java/de/iwomm/propify_api/security/CorsConfig.java

@@ -0,0 +1,28 @@
+package de.iwomm.propify_api.security;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Configuration
+public class CorsConfig implements WebMvcConfigurer {
+    private final CorsProperties corsProperties;
+
+    public CorsConfig(CorsProperties corsProperties) {
+        this.corsProperties = corsProperties;
+    }
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**") // Apply rules to all endpoints
+                .allowedOrigins(corsProperties.getAllowedOrigins().toArray(new String[0])) // This targets the frontend app's URLs (you can allow multiple URLs, e.g. "http://localhost:4200,http://example.com"
+                .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
+                .allowedHeaders(corsProperties.getAllowedHeaders())
+                .allowCredentials(true); // Allow cookies and authentication headers
+    }
+}

src/main/java/de/iwomm/propify_api/security/CorsProperties.java

@@ -0,0 +1,29 @@
+package de.iwomm.propify_api.security;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.List;
+
+@Configuration
+@ConfigurationProperties(prefix = "cors")
+public class CorsProperties {
+    private List<String> allowedOrigins;
+    private String allowedHeaders;
+
+    public List<String> getAllowedOrigins() {
+        return allowedOrigins;
+    }
+
+    public void setAllowedOrigins(List<String> allowedOrigins) {
+        this.allowedOrigins = allowedOrigins;
+    }
+
+    public String getAllowedHeaders() {
+        return allowedHeaders;
+    }
+
+    public void setAllowedHeaders(String allowedHeaders) {
+        this.allowedHeaders = allowedHeaders;
+    }
+}

src/main/java/de/iwomm/propify_api/security/KeycloakRoleConverter.java

@@ -0,0 +1,33 @@
+package de.iwomm.propify_api.security;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.oauth2.jwt.Jwt;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class KeycloakRoleConverter implements Converter<Jwt, Collection<GrantedAuthority>> {
+
+    @Override
+    public Collection<GrantedAuthority> convert(Jwt jwt) {
+        // Holen Sie sich das "realm_access" Feld aus dem Token
+        Map<String, Object> realmAccess = (Map<String, Object>) jwt.getClaims().get("realm_access");
+
+        if (realmAccess == null || realmAccess.isEmpty()) {
+            return List.of();
+        }
+
+        // Holen Sie sich die Liste der Rollen
+        List<String> roles = (List<String>) realmAccess.get("roles");
+
+        // Konvertieren Sie die Rollen in Spring Security GrantedAuthority-Objekte
+        return roles.stream()
+                .map(roleName -> "ROLE_" + roleName.toUpperCase()) // Empfohlene Namenskonvention
+                .map(SimpleGrantedAuthority::new)
+                .collect(Collectors.toList());
+    }
+}

src/main/java/de/iwomm/propify_api/security/SecurityConfig.java

@@ -2,27 +2,44 @@ package de.iwomm.propify_api.security;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
+import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationConverter;
 import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
 
 @Configuration
 @EnableWebSecurity
+@EnableMethodSecurity // Wichtig für die Verwendung von @PreAuthorize
 public class SecurityConfig {
 
     @Bean
     public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
         http
-                .csrf(csrf -> csrf.disable()) // CSRF deaktivieren für APIs
-                .authorizeHttpRequests(auth -> auth
-                        .requestMatchers("/api/**").permitAll() // API ist offen
-                        .anyRequest().permitAll()               // Alles andere auch offen
+                .csrf(AbstractHttpConfigurer::disable)
+                .cors(cors -> {})
+
+                .authorizeHttpRequests(authorize -> authorize
+                        .requestMatchers("/api/**").authenticated()
+                        .anyRequest().permitAll()
                 )
-                .httpBasic(httpBasic -> httpBasic.disable()) // Kein Basic Auth
-                .formLogin(form -> form.disable());         // Kein Login-Formular
+
+                .oauth2ResourceServer(oauth2 -> oauth2
+                        .jwt(jwt -> jwt.jwtAuthenticationConverter(jwtAuthenticationConverter()))
+                )
+
+                .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS));
 
         return http.build();
     }
 
-
-}
+    // Konvertiert die Keycloak-Rollen (im JWT) in Spring Security Authorities
+    private JwtAuthenticationConverter jwtAuthenticationConverter() {
+        JwtAuthenticationConverter jwtAuthenticationConverter = new JwtAuthenticationConverter();
+        jwtAuthenticationConverter.setJwtGrantedAuthoritiesConverter(new KeycloakRoleConverter());
+        return jwtAuthenticationConverter;
+    }
+}