Set Java 8 as minimum required version (#874)

- Upgraded Bouncy Castle from 1.70 to 1.75
- Upgraded SLF4J from 1.7.36 to 2.0.7
- Upgraded Logback from 1.2.11 to 1.3.8
- Upgraded Apache MINA SSHD from 2.8.0 to 2.10.0
- Upgraded Grizzly HTTP Server from 2.4.4 to 3.0.1
- Upgraded Testcontainers from 1.16.2 to 1.18.3
- Refactored references and removed HttpClient dependency
- Upgraded GitHub Actions setup-java from 1 to 3
- Updated GitHub Actions to use Temurin JDK 11
- Added OpenSSL upgrade to RSA Key Tests

Co-authored-by: Jeroen van Erp <jeroen@hierynomus.com>

.github/workflows/gradle.yml

@@ -6,20 +6,20 @@ name: Build SSHJ
 
 on:
   push:
-    branches: [ master ]
   pull_request:
     branches: [ master ]
 
 jobs:
   java12:
-    name: Build with Java 12
+    name: Build with Java 11
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 12
+    - name: Set up Java 11
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v3
       with:
-        java-version: 12
+        distribution: 'temurin'
+        java-version: 11
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle
@@ -29,14 +29,14 @@ jobs:
 
   integration:
     name: Integration test
-    needs: [java12]
+    runs-on: ubuntu-latest
-    runs-on: [ubuntu-latest]
     steps:
       - uses: actions/checkout@v2
       - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
-      - uses: actions/setup-java@v1
+      - uses: actions/setup-java@v3
         with:
-          java-version: 12
+          distribution: 'temurin'
+          java-version: 11
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
       - name: Build with Gradle

README.adoc

@@ -95,7 +95,11 @@ If you need something that is not included, it shouldn't be too hard to add (do
 http://ssh-comparison.quendi.de/comparison.html[SSH Implementation Comparison]
 
 == Dependencies
-Java 7+. http://www.slf4j.org/download.html[slf4j] is required. http://www.bouncycastle.org/java.html[bouncycastle] is highly recommended and required for using some of the crypto algorithms.
+
+- Java 8 or higher
+- https://www.slf4j.org/[SLF4J 2.0.0]
+- https://www.bouncycastle.org[Bouncy Castle]
+
 
 == Reporting bugs
 Issue tracker: https://github.com/hierynomus/sshj/issues

build.gradle

@@ -35,27 +35,29 @@ project.version = scmVersion.version
 
 configurations.implementation.transitive = false
 
-def bouncycastleVersion = "1.70"
+def bouncycastleVersion = "1.75"
-def sshdVersion = "2.8.0"
+def sshdVersion = "2.10.0"
 
 dependencies {
-  implementation "org.slf4j:slf4j-api:1.7.36"
+  implementation "org.slf4j:slf4j-api:2.0.7"
-  implementation "org.bouncycastle:bcprov-jdk15on:$bouncycastleVersion"
+  implementation "org.bouncycastle:bcprov-jdk18on:$bouncycastleVersion"
-  implementation "org.bouncycastle:bcpkix-jdk15on:$bouncycastleVersion"
+  implementation "org.bouncycastle:bcpkix-jdk18on:$bouncycastleVersion"
   implementation "com.hierynomus:asn-one:0.6.0"
-
   implementation "net.i2p.crypto:eddsa:0.3.0"
 
-  testImplementation "junit:junit:4.13.2"
+  testImplementation(platform("org.junit:junit-bom:5.9.3"))
-  testImplementation 'org.spockframework:spock-core:1.3-groovy-2.4'
+  testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
-  testImplementation "org.mockito:mockito-core:4.2.0"
+  testRuntimeOnly 'org.junit.vintage:junit-vintage-engine'
+  testImplementation 'junit:junit:4.13.2'
+  testImplementation 'org.spockframework:spock-core:2.3-groovy-3.0'
+  testImplementation 'org.spockframework:spock-junit4:2.3-groovy-3.0'
+  testImplementation "org.mockito:mockito-core:4.11.0"
   testImplementation "org.apache.sshd:sshd-core:$sshdVersion"
   testImplementation "org.apache.sshd:sshd-sftp:$sshdVersion"
   testImplementation "org.apache.sshd:sshd-scp:$sshdVersion"
-  testImplementation "ch.qos.logback:logback-classic:1.2.11"
+  testImplementation "ch.qos.logback:logback-classic:1.3.8"
-  testImplementation 'org.glassfish.grizzly:grizzly-http-server:2.4.4'
+  testImplementation 'org.glassfish.grizzly:grizzly-http-server:3.0.1'
-  testImplementation 'org.apache.httpcomponents:httpclient:4.5.13'
+  testImplementation 'org.testcontainers:testcontainers:1.18.3'
-  testImplementation 'org.testcontainers:testcontainers:1.16.2'
 }
 
 license {
@@ -83,7 +85,7 @@ if (JavaVersion.current().isJava8Compatible()) {
 }
 
 compileJava {
-  options.compilerArgs.addAll(['--release', '7'])
+  options.compilerArgs.addAll(['--release', '8'])
 }
 
 task writeSshjVersionProperties {
@@ -119,7 +121,6 @@ jar {
   }
 }
 
-
 java {
 	withJavadocJar()
 	withSourcesJar()
@@ -163,14 +164,7 @@ tasks.withType(Test) {
   testLogging {
     exceptionFormat = 'full'
   }
-  include "**/*Test.*"
+  useJUnitPlatform()
-  include "**/*Spec.*"
-  if (!project.hasProperty("allTests")) {
-    useJUnit {
-      excludeCategories 'com.hierynomus.sshj.test.SlowTests'
-      excludeCategories 'com.hierynomus.sshj.test.KnownFailingTests'
-    }
-  }
 
   afterSuite { descriptor, result ->
     if (descriptor.className != null) {

src/itest/groovy/com/hierynomus/sshj/RsaShaKeySignatureTest.groovy

@@ -38,7 +38,7 @@ class RsaShaKeySignatureTest extends Specification {
 
     private static void dockerfileBuilder(DockerfileBuilder it, String hostKey, String pubkeyAcceptedAlgorithms) {
         it.from("archlinux:base")
-        it.run('yes | pacman -Sy core/openssh' +
+        it.run('pacman -Sy --noconfirm core/openssh core/openssl' +
                 ' && (' +
                 '  V=$(echo $(/usr/sbin/sshd -h 2>&1) | grep -o \'OpenSSH_[0-9][0-9]*[.][0-9][0-9]*p[0-9]\');' +
                 '  if [[ "$V" < OpenSSH_8.8p1 ]]; then' +
@@ -61,7 +61,6 @@ class RsaShaKeySignatureTest extends Specification {
                 '-D',
                 '-e',
                 '-f', '/dev/null',
-                '-o', 'LogLevel=DEBUG2',
                 '-o', "HostKey=/etc/ssh/$hostKey",
         ]
         if (pubkeyAcceptedAlgorithms != null) {
@@ -130,7 +129,7 @@ class RsaShaKeySignatureTest extends Specification {
     }
 
     @Unroll
-    def "connect to a server with host key #hostkey that supports only ssh-rsa"() {
+    def "connect to a server with host key #hostKey that supports only ssh-rsa"() {
         given:
         SshdContainer sshd = makeSshdContainer(hostKey, "ssh-rsa,ssh-ed25519")
         sshd.start()

src/test/java/com/hierynomus/sshj/connection/channel/forwarded/LocalPortForwarderTest.java

@@ -21,28 +21,28 @@ import com.hierynomus.sshj.test.util.FileUtil;
 import net.schmizz.sshj.SSHClient;
 import net.schmizz.sshj.connection.channel.direct.LocalPortForwarder;
 import net.schmizz.sshj.connection.channel.direct.Parameters;
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpGet;
-import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.sshd.server.forward.AcceptAllForwardingFilter;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
-import java.io.*;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.net.HttpURLConnection;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
+import java.net.URL;
 
-import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
 
 public class LocalPortForwarderTest {
-    private static final Logger log = LoggerFactory.getLogger(LocalPortForwarderTest.class);
+    private static final String LOCALHOST_URL = "http://127.0.0.1:8080";
 
     @Rule
     public SshFixture fixture = new SshFixture();
@@ -59,8 +59,7 @@ public class LocalPortForwarderTest {
 
     @Test
     public void shouldHaveWorkingHttpServer() throws IOException {
-        // Just to check that we have a working http server...
+        assertEquals(200, httpGet());
-        assertThat(httpGet("127.0.0.1", 8080), equalTo(200));
     }
 
     @Test
@@ -93,7 +92,6 @@ public class LocalPortForwarderTest {
     }
 
     public static void httpGetAndAssertConnectionClosedByServer(int port) throws IOException {
-        System.out.println("HTTP GET to port: " + port);
         try (Socket socket = new Socket("localhost", port)) {
             // Send a basic HTTP GET
             // It returns 400 Bad Request because it's missing a bunch of info, but the HTTP response doesn't matter, we just want to test the connection closing.
@@ -107,12 +105,8 @@ public class LocalPortForwarderTest {
             InputStream inputStream = socket.getInputStream();
             InputStreamReader reader = new InputStreamReader(inputStream);
             int buf = -2;
-            while (true) {
+            while (buf != -1) {
                 buf = reader.read();
-                System.out.print((char)buf);
-                if (buf == -1) {
-                    break;
-                }
             }
 
             // Attempt to read more. If the server has closed the connection this will return -1
@@ -123,12 +117,12 @@ public class LocalPortForwarderTest {
         }
     }
 
-    private int httpGet(String server, int port) throws IOException {
+    private int httpGet() throws IOException {
-        HttpClient client = HttpClientBuilder.create().build();
+        final URL url = new URL(LOCALHOST_URL);
-        String urlString = "http://" + server + ":" + port;
+        final HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
-        log.info("Trying: GET " + urlString);
+        urlConnection.setConnectTimeout(3000);
-        HttpResponse execute = client.execute(new HttpGet(urlString));
+        urlConnection.setRequestMethod("GET");
-        return execute.getStatusLine().getStatusCode();
+        return urlConnection.getResponseCode();
     }
 
     private SSHClient getFixtureClient() throws IOException {

src/test/java/com/hierynomus/sshj/connection/channel/forwarded/RemotePortForwarderTest.java

@@ -22,28 +22,23 @@ import net.schmizz.sshj.SSHClient;
 import net.schmizz.sshj.connection.ConnectionException;
 import net.schmizz.sshj.connection.channel.forwarded.RemotePortForwarder;
 import net.schmizz.sshj.connection.channel.forwarded.SocketForwardingConnectListener;
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpGet;
-import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.sshd.server.forward.AcceptAllForwardingFilter;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.io.IOException;
+import java.net.HttpURLConnection;
 import java.net.InetSocketAddress;
+import java.net.URL;
 
 import static org.junit.Assert.assertEquals;
 
 public class RemotePortForwarderTest {
-    private static final Logger log = LoggerFactory.getLogger(RemotePortForwarderTest.class);
-
     private static final PortRange RANGE = new PortRange(9000, 9999);
     private static final String LOCALHOST = "127.0.0.1";
+    private static final String LOCALHOST_URL_FORMAT = "http://127.0.0.1:%d";
     private static final InetSocketAddress HTTP_SERVER_SOCKET_ADDR = new InetSocketAddress(LOCALHOST, 8080);
 
     @Rule
@@ -61,8 +56,7 @@ public class RemotePortForwarderTest {
 
     @Test
     public void shouldHaveWorkingHttpServer() throws IOException {
-        // Just to check that we have a working http server...
+        assertEquals(200, httpGet(8080));
-        assertEquals(200, httpGet( 8080));
     }
 
     @Test
@@ -127,12 +121,12 @@ public class RemotePortForwarderTest {
         }
     }
 
-    private int httpGet(int port) throws IOException {
+    private int httpGet(final int port) throws IOException {
-        HttpClient client = HttpClientBuilder.create().build();
+        final URL url = new URL(String.format(LOCALHOST_URL_FORMAT, port));
-        String urlString = "http://" + LOCALHOST + ":" + port;
+        final HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
-        log.info("Trying: GET " + urlString);
+        urlConnection.setConnectTimeout(3000);
-        HttpResponse execute = client.execute(new HttpGet(urlString));
+        urlConnection.setRequestMethod("GET");
-        return execute.getStatusLine().getStatusCode();
+        return urlConnection.getResponseCode();
     }
 
     private SSHClient getFixtureClient() throws IOException {