Release 1.1.0

src/main/java/eu/europa/ec/simpl/tlsgateway/configurations/ssl/UsersRolesClient.java

+package eu.europa.ec.simpl.tlsgateway.configurations.ssl;
+
+import eu.europa.ec.simpl.tlsgateway.configurations.microservices.UsersRolesProperties;
+import eu.europa.ec.simpl.tlsgateway.exceptions.InvalidCertificateException;
+import java.nio.charset.StandardCharsets;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@Component
+public class UsersRolesClient {
+    private final UsersRolesProperties usersRolesProperties;
+
+    public UsersRolesClient(UsersRolesProperties usersRolesProperties) {
+        this.usersRolesProperties = usersRolesProperties;
+    }
+
+    public String loadPemCertificates() {
+        return WebClient.builder()
+                .baseUrl("%s/credential/download".formatted(usersRolesProperties.url()))
+                .defaultHeader("Content-Type", MediaType.APPLICATION_OCTET_STREAM_VALUE)
+                .build()
+                .get()
+                .retrieve()
+                .bodyToMono(byte[].class)
+                .map(res -> new String(res, StandardCharsets.UTF_8))
+                .doOnError(e -> {
+                    throw new InvalidCertificateException(
+                            "Failed to load certificate from %s".formatted(usersRolesProperties.url()));
+                })
+                .block();
+    }
+}