Register NTLM authentication support explicitly

Author: strangelookingnerd

src/main/java/jenkins/plugins/http_request/auth/CredentialNtlmAuthentication.java

@@ -3,13 +3,18 @@
 import java.io.PrintStream;
 import java.net.URISyntaxException;
 
+import org.apache.hc.client5.http.auth.AuthSchemeFactory;
+import org.apache.hc.client5.http.auth.StandardAuthScheme;
 import org.apache.hc.client5.http.classic.methods.HttpUriRequestBase;
 import org.apache.hc.client5.http.impl.auth.BasicCredentialsProvider;
 import org.apache.hc.client5.http.auth.AuthScope;
 import org.apache.hc.client5.http.auth.NTCredentials;
+import org.apache.hc.client5.http.impl.auth.NTLMSchemeFactory;
 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
 import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
 import org.apache.hc.client5.http.protocol.HttpClientContext;
+import org.apache.hc.core5.http.config.Lookup;
+import org.apache.hc.core5.http.config.RegistryBuilder;
 
 import com.cloudbees.plugins.credentials.common.StandardUsernamePasswordCredentials;
 
@@ -59,7 +64,15 @@ static CloseableHttpClient auth(HttpClientBuilder clientBuilder, HttpClientConte
                     new AuthScope(requestBase.getUri().getHost(), requestBase.getUri().getPort()),
                     new NTCredentials(username, password.toCharArray(), requestBase.getUri().getHost(), domain));
 
-            clientBuilder.setDefaultCredentialsProvider(provider);
+			// register NTLM authentication support explicitly
+			Lookup<AuthSchemeFactory> authRegistry = RegistryBuilder.<AuthSchemeFactory>create()
+					.register(StandardAuthScheme.NTLM, NTLMSchemeFactory.INSTANCE)
+					.build();
+
+            clientBuilder
+					.setDefaultCredentialsProvider(provider)
+					.setDefaultAuthSchemeRegistry(authRegistry);
+
             context.setCredentialsProvider(provider);
 
             return clientBuilder.build();