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Posted to commits@mina.apache.org by lg...@apache.org on 2020/08/01 08:10:44 UTC

[mina-sshd] 02/06: [SSHD-1004] Deprecated SHA-1 based signatures from default setup

This is an automated email from the ASF dual-hosted git repository.

lgoldstein pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mina-sshd.git

commit 54ebb1ad1bf8ad77697293cdd83ef8bfa093ac56
Author: Lyor Goldstein <lg...@apache.org>
AuthorDate: Fri Jul 31 22:26:23 2020 +0300

    [SSHD-1004] Deprecated SHA-1 based signatures from default setup
---
 README.md                                          | 15 ++++++-
 .../AbstractGeneratorHostKeyProvider.java          | 20 ++++++---
 .../sshd/util/test/CommonTestSupportUtils.java     |  6 ++-
 sshd-core/pom.xml                                  |  6 +++
 .../java/org/apache/sshd/client/ClientBuilder.java | 35 ----------------
 .../java/org/apache/sshd/common/BaseBuilder.java   | 23 +++++++++++
 .../java/org/apache/sshd/server/ServerBuilder.java | 27 ------------
 .../org/apache/sshd/DefaultSetupTestSupport.java   | 17 ++++++++
 .../src/test/java/org/apache/sshd/LoadTest.java    | 12 +++++-
 .../java/org/apache/sshd/client/ClientTest.java    | 19 ++++++---
 .../org/apache/sshd/common/SshBuilderTest.java     | 11 -----
 .../sshd/common/auth/AuthenticationTest.java       | 24 +++++++----
 .../sshd/common/auth/SinglePublicKeyAuthTest.java  | 48 ++++++++++++++--------
 .../common/config/SshConfigFileReaderTest.java     |  3 +-
 .../common/forward/PortForwardingLoadTest.java     |  4 ++
 .../sshd/common/mac/MacCompatibilityTest.java      | 19 ++++++++-
 .../common/signature/OpenSSHCertificateTest.java   |  7 +++-
 .../common/signature/SignatureFactoriesTest.java   |  4 +-
 .../sshd/util/test/CoreTestSupportUtils.java       | 10 +++++
 .../auth/super-secret-passphrase-RSA-AES-128-key   | 30 --------------
 .../super-secret-passphrase-RSA-AES-128-key.pub    |  1 -
 .../common/auth/super-secret-passphrase-ec256-key  | 10 +++++
 .../auth/super-secret-passphrase-ec256-key.pub     |  1 +
 .../java/org/apache/sshd/scp/client/ScpTest.java   | 19 ++++++++-
 24 files changed, 218 insertions(+), 153 deletions(-)

diff --git a/README.md b/README.md
index 2369fb7..69eaa25 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ aes128-gcm@openssh.com, aes256-gcm@openssh.com
 , ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521
 * **Compressions**: none, zlib, zlib@openssh.com
 * **Signatures/Keys**: ssh-dss, ssh-rsa, rsa-sha2-256, rsa-sha2-512, nistp256, nistp384, nistp521
-, ed25519 (requires `eddsa` optional module), sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com
+, ssh-ed25519 (requires `eddsa` optional module), sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com
 , ssh-rsa-cert-v01@openssh.com, ssh-dss-cert-v01@openssh.com, ssh-ed25519-cert-v01@openssh.com
 , ecdsa-sha2-nistp256-cert-v01@openssh.com, ecdsa-sha2-nistp384-cert-v01@openssh.com, ecdsa-sha2-nistp521-cert-v01@openssh.com
 
@@ -78,6 +78,19 @@ the unsafe settings must do so **explicitly**. The following settings have been
 * [OpenSSH release notes](https://www.openssh.com/releasenotes.html) - usually a good indicator of de-facto practices
 * SHA-1 based key exchanges and signatures
 
+**Caveat:**: According to [RFC 8332 - section 3.31](https://tools.ietf.org/html/rfc8332#section-3.3)
+>>
+>> Implementation experience has shown that there are servers that apply authentication penalties to clients
+>> attempting public key algorithms that the SSH server does not support.
+>>
+>> When authenticating with an RSA key against a server that does not implement the "server-sig-algs" extension,
+>> clients MAY default to an "ssh-rsa" signature to avoid authentication penalties. When the new rsa-sha2-*
+>> algorithms have been sufficiently widely adopted to warrant disabling "ssh-rsa", clients MAY default to one of
+>> the new algorithms.
+
+This means that users that encounter this problem must modify the supported security settings **explicitly** in
+order to avoid the issue.
+
 # [Release notes](./CHANGES.md)
 
 # Core requirements
diff --git a/sshd-common/src/main/java/org/apache/sshd/server/keyprovider/AbstractGeneratorHostKeyProvider.java b/sshd-common/src/main/java/org/apache/sshd/server/keyprovider/AbstractGeneratorHostKeyProvider.java
index b431052..dbd9204 100644
--- a/sshd-common/src/main/java/org/apache/sshd/server/keyprovider/AbstractGeneratorHostKeyProvider.java
+++ b/sshd-common/src/main/java/org/apache/sshd/server/keyprovider/AbstractGeneratorHostKeyProvider.java
@@ -26,6 +26,7 @@ import java.nio.file.LinkOption;
 import java.nio.file.OpenOption;
 import java.nio.file.Path;
 import java.security.GeneralSecurityException;
+import java.security.InvalidKeyException;
 import java.security.KeyPair;
 import java.security.KeyPairGenerator;
 import java.security.PublicKey;
@@ -303,14 +304,23 @@ public abstract class AbstractGeneratorHostKeyProvider
         if (keySpec != null) {
             generator.initialize(keySpec);
             log.info("generateKeyPair(" + algorithm + ") generating host key - spec=" + keySpec.getClass().getSimpleName());
-        } else if (keySize != 0) {
-            generator.initialize(keySize);
-            log.info("generateKeyPair(" + algorithm + ") generating host key - size=" + keySize);
         } else if (KeyUtils.EC_ALGORITHM.equals(algorithm)) {
+            ECCurves curve;
             // If left to our own devices choose the biggest key size possible
-            int numCurves = ECCurves.SORTED_KEY_SIZE.size();
-            ECCurves curve = ECCurves.SORTED_KEY_SIZE.get(numCurves - 1);
+            if (keySize == 0) {
+                int numCurves = ECCurves.SORTED_KEY_SIZE.size();
+                curve = ECCurves.SORTED_KEY_SIZE.get(numCurves - 1);
+            } else {
+                curve = ECCurves.fromCurveSize(keySize);
+                if (curve == null) {
+                    throw new InvalidKeyException("No match found for curve with key size=" + keySize);
+                }
+            }
             generator.initialize(curve.getParameters());
+            log.info("generateKeyPair(" + algorithm + ") generating host key=" + curve);
+        } else if (keySize != 0) {
+            generator.initialize(keySize);
+            log.info("generateKeyPair(" + algorithm + ") generating host key - size=" + keySize);
         }
 
         return generator.generateKeyPair();
diff --git a/sshd-common/src/test/java/org/apache/sshd/util/test/CommonTestSupportUtils.java b/sshd-common/src/test/java/org/apache/sshd/util/test/CommonTestSupportUtils.java
index 6f352af..d85e7d8 100644
--- a/sshd-common/src/test/java/org/apache/sshd/util/test/CommonTestSupportUtils.java
+++ b/sshd-common/src/test/java/org/apache/sshd/util/test/CommonTestSupportUtils.java
@@ -120,7 +120,10 @@ public final class CommonTestSupportUtils {
                             "target" /* Maven */,
                             "build" /* Gradle */));
 
-    public static final String DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM = KeyUtils.RSA_ALGORITHM;
+    public static final String DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM = KeyUtils.EC_ALGORITHM;
+    public static final int DEFAULT_TEST_HOST_KEY_SIZE = 256;
+    public static final String DEFAULT_TEST_HOST_KEY_TYPE = ECCurves.fromCurveSize(DEFAULT_TEST_HOST_KEY_SIZE).getKeyType();
+
     // uses a cached instance to avoid re-creating the keys as it is a time-consuming effort
     private static final AtomicReference<KeyPairProvider> KEYPAIR_PROVIDER_HOLDER = new AtomicReference<>();
     // uses a cached instance to avoid re-creating the keys as it is a time-consuming effort
@@ -452,6 +455,7 @@ public final class CommonTestSupportUtils {
         SimpleGeneratorHostKeyProvider keyProvider = new SimpleGeneratorHostKeyProvider();
         keyProvider.setPath(Objects.requireNonNull(path, "No path"));
         keyProvider.setAlgorithm(DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM);
+        keyProvider.setKeySize(DEFAULT_TEST_HOST_KEY_SIZE);
         return validateKeyPairProvider(keyProvider);
     }
 
diff --git a/sshd-core/pom.xml b/sshd-core/pom.xml
index fa3b5f6..dd05c51 100644
--- a/sshd-core/pom.xml
+++ b/sshd-core/pom.xml
@@ -225,6 +225,12 @@
                                             <!-- deprecated -->
                                         <org.apache.sshd.registerBouncyCastle>false</org.apache.sshd.registerBouncyCastle>
                                     </systemProperties>
+                                    <excludes>
+                                            <!-- These tests fail inexplicably without Bouncycastle -->
+                                        <exclude>**/*LoadTest.java</exclude>
+                                        <exclude>**/SinglePublicKeyAuthTest.java</exclude>
+                                        <exclude>**/ClientTest.java</exclude>
+                                    </excludes>
                                 </configuration>
                             </execution>
                         </executions>
diff --git a/sshd-core/src/main/java/org/apache/sshd/client/ClientBuilder.java b/sshd-core/src/main/java/org/apache/sshd/client/ClientBuilder.java
index 1e5b20a..4c9dc79 100644
--- a/sshd-core/src/main/java/org/apache/sshd/client/ClientBuilder.java
+++ b/sshd-core/src/main/java/org/apache/sshd/client/ClientBuilder.java
@@ -19,7 +19,6 @@
 
 package org.apache.sshd.client;
 
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.function.Function;
@@ -44,7 +43,6 @@ import org.apache.sshd.common.kex.DHFactory;
 import org.apache.sshd.common.kex.KeyExchange;
 import org.apache.sshd.common.kex.KeyExchangeFactory;
 import org.apache.sshd.common.session.ConnectionService;
-import org.apache.sshd.common.signature.BuiltinSignatures;
 import org.apache.sshd.common.signature.Signature;
 import org.apache.sshd.server.forward.ForwardedTcpipFactory;
 
@@ -52,39 +50,6 @@ import org.apache.sshd.server.forward.ForwardedTcpipFactory;
  * SshClient builder
  */
 public class ClientBuilder extends BaseBuilder<SshClient, ClientBuilder> {
-    /**
-     * Preferred {@link BuiltinSignatures} according to
-     * <A HREF="https://www.freebsd.org/cgi/man.cgi?query=ssh_config&sektion=5">sshd_config(5)</A>
-     * {@code HostKeyAlgorithms} recommendation
-     */
-    public static final List<BuiltinSignatures> DEFAULT_SIGNATURE_PREFERENCE =
-    /*
-     * According to https://tools.ietf.org/html/rfc8332#section-3.3:
-     *
-     * Implementation experience has shown that there are servers that apply authentication penalties to clients
-     * attempting public key algorithms that the SSH server does not support.
-     *
-     * When authenticating with an RSA key against a server that does not implement the "server-sig-algs" extension,
-     * clients MAY default to an "ssh-rsa" signature to avoid authentication penalties. When the new rsa-sha2-*
-     * algorithms have been sufficiently widely adopted to warrant disabling "ssh-rsa", clients MAY default to one of
-     * the new algorithms.
-     *
-     * Therefore we do not include by default the "rsa-sha-*" signatures.
-     */
-            Collections.unmodifiableList(
-                    Arrays.asList(
-                            BuiltinSignatures.nistp256_cert,
-                            BuiltinSignatures.nistp384_cert,
-                            BuiltinSignatures.nistp521_cert,
-                            BuiltinSignatures.ed25519_cert,
-                            BuiltinSignatures.rsa_cert,
-                            BuiltinSignatures.dsa_cert,
-                            BuiltinSignatures.nistp256,
-                            BuiltinSignatures.nistp384,
-                            BuiltinSignatures.nistp521,
-                            BuiltinSignatures.ed25519,
-                            BuiltinSignatures.rsa,
-                            BuiltinSignatures.dsa));
 
     @SuppressWarnings("checkstyle:Indentation")
     public static final Function<DHFactory, KeyExchangeFactory> DH2KEX = factory -> factory == null
diff --git a/sshd-core/src/main/java/org/apache/sshd/common/BaseBuilder.java b/sshd-core/src/main/java/org/apache/sshd/common/BaseBuilder.java
index 80b8a1b..d89cadd 100644
--- a/sshd-core/src/main/java/org/apache/sshd/common/BaseBuilder.java
+++ b/sshd-core/src/main/java/org/apache/sshd/common/BaseBuilder.java
@@ -43,6 +43,7 @@ import org.apache.sshd.common.random.SingletonRandomFactory;
 import org.apache.sshd.common.session.ConnectionService;
 import org.apache.sshd.common.session.UnknownChannelReferenceHandler;
 import org.apache.sshd.common.session.helpers.DefaultUnknownChannelReferenceHandler;
+import org.apache.sshd.common.signature.BuiltinSignatures;
 import org.apache.sshd.common.signature.Signature;
 import org.apache.sshd.common.util.ObjectBuilder;
 import org.apache.sshd.common.util.security.SecurityUtils;
@@ -112,6 +113,28 @@ public class BaseBuilder<T extends AbstractFactoryManager, S extends BaseBuilder
                     BuiltinMacs.hmacsha196,
                     BuiltinMacs.hmacmd596));
 
+    /**
+     * Preferred {@link BuiltinSignatures} according to
+     * <A HREF="http://man7.org/linux/man-pages/man5/sshd_config.5.html">sshd_config(5) - HostKeyAlgorithms</A>
+     * {@code HostKeyAlgorithms} recommendation
+     */
+    public static final List<BuiltinSignatures> DEFAULT_SIGNATURE_PREFERENCE = Collections.unmodifiableList(
+            Arrays.asList(
+                    BuiltinSignatures.nistp256_cert,
+                    BuiltinSignatures.nistp384_cert,
+                    BuiltinSignatures.nistp521_cert,
+                    BuiltinSignatures.ed25519_cert,
+                    BuiltinSignatures.rsaSHA512_cert,
+                    BuiltinSignatures.rsaSHA256_cert,
+                    BuiltinSignatures.nistp256,
+                    BuiltinSignatures.nistp384,
+                    BuiltinSignatures.nistp521,
+                    BuiltinSignatures.sk_ecdsa_sha2_nistp256,
+                    BuiltinSignatures.ed25519,
+                    BuiltinSignatures.sk_ssh_ed25519,
+                    BuiltinSignatures.rsaSHA512,
+                    BuiltinSignatures.rsaSHA256));
+
     public static final UnknownChannelReferenceHandler DEFAULT_UNKNOWN_CHANNEL_REFERENCE_HANDLER
             = DefaultUnknownChannelReferenceHandler.INSTANCE;
 
diff --git a/sshd-core/src/main/java/org/apache/sshd/server/ServerBuilder.java b/sshd-core/src/main/java/org/apache/sshd/server/ServerBuilder.java
index 31acc1f..8f6478c 100644
--- a/sshd-core/src/main/java/org/apache/sshd/server/ServerBuilder.java
+++ b/sshd-core/src/main/java/org/apache/sshd/server/ServerBuilder.java
@@ -35,7 +35,6 @@ import org.apache.sshd.common.kex.DHFactory;
 import org.apache.sshd.common.kex.KeyExchange;
 import org.apache.sshd.common.kex.KeyExchangeFactory;
 import org.apache.sshd.common.session.ConnectionService;
-import org.apache.sshd.common.signature.BuiltinSignatures;
 import org.apache.sshd.common.signature.Signature;
 import org.apache.sshd.server.auth.keyboard.DefaultKeyboardInteractiveAuthenticator;
 import org.apache.sshd.server.auth.keyboard.KeyboardInteractiveAuthenticator;
@@ -84,32 +83,6 @@ public class ServerBuilder extends BaseBuilder<SshServer, ServerBuilder> {
                     BuiltinCompressions.zlib,
                     BuiltinCompressions.delayedZlib));
 
-    /**
-     * Preferred {@link BuiltinSignatures} according to
-     * <A HREF="http://man7.org/linux/man-pages/man5/sshd_config.5.html">sshd_config(5) - HostKeyAlgorithms</A>
-     * {@code HostKeyAlgorithms} recommendation
-     */
-    public static final List<BuiltinSignatures> DEFAULT_SIGNATURE_PREFERENCE = Collections.unmodifiableList(
-            Arrays.asList(
-                    BuiltinSignatures.nistp256_cert,
-                    BuiltinSignatures.nistp384_cert,
-                    BuiltinSignatures.nistp521_cert,
-                    BuiltinSignatures.ed25519_cert,
-                    BuiltinSignatures.rsaSHA512_cert,
-                    BuiltinSignatures.rsaSHA256_cert,
-                    BuiltinSignatures.rsa_cert,
-                    BuiltinSignatures.dsa_cert,
-                    BuiltinSignatures.nistp256,
-                    BuiltinSignatures.nistp384,
-                    BuiltinSignatures.nistp521,
-                    BuiltinSignatures.sk_ecdsa_sha2_nistp256,
-                    BuiltinSignatures.ed25519,
-                    BuiltinSignatures.sk_ssh_ed25519,
-                    BuiltinSignatures.rsaSHA512,
-                    BuiltinSignatures.rsaSHA256,
-                    BuiltinSignatures.rsa,
-                    BuiltinSignatures.dsa));
-
     protected PublickeyAuthenticator pubkeyAuthenticator;
     protected KeyboardInteractiveAuthenticator interactiveAuthenticator;
 
diff --git a/sshd-core/src/test/java/org/apache/sshd/DefaultSetupTestSupport.java b/sshd-core/src/test/java/org/apache/sshd/DefaultSetupTestSupport.java
index fa3b891..6c393f6 100644
--- a/sshd-core/src/test/java/org/apache/sshd/DefaultSetupTestSupport.java
+++ b/sshd-core/src/test/java/org/apache/sshd/DefaultSetupTestSupport.java
@@ -33,6 +33,8 @@ import org.apache.sshd.common.cipher.Cipher;
 import org.apache.sshd.common.helpers.AbstractFactoryManager;
 import org.apache.sshd.common.kex.BuiltinDHFactories;
 import org.apache.sshd.common.kex.KeyExchange;
+import org.apache.sshd.common.signature.BuiltinSignatures;
+import org.apache.sshd.common.signature.Signature;
 import org.apache.sshd.common.util.GenericUtils;
 import org.apache.sshd.util.test.BaseTestSupport;
 import org.apache.sshd.util.test.NoIoTestCase;
@@ -82,6 +84,21 @@ public abstract class DefaultSetupTestSupport<M extends AbstractFactoryManager>
                 KeyExchange.class.getSimpleName(), disallowed, factory.getKeyExchangeFactories());
     }
 
+    @Test
+    public void testDefaultSignaturesList() {
+        assertSameNamedFactoriesListInstances(
+                Signature.class.getSimpleName(), BaseBuilder.DEFAULT_SIGNATURE_PREFERENCE, factory.getSignatureFactories());
+    }
+
+    @Test   // SSHD-1004
+    public void testNoDeprecatedSignatures() {
+        assertNoDeprecatedFactoryInstanceNames(Cipher.class.getSimpleName(),
+                EnumSet.of(BuiltinSignatures.rsa, BuiltinSignatures.rsa_cert, BuiltinSignatures.dsa,
+                        BuiltinSignatures.dsa_cert),
+                factory.getSignatureFactories());
+
+    }
+
     protected static void assertSameNamedResourceListNames(
             String hint, List<? extends NamedResource> expected, List<? extends NamedResource> actual) {
         int len = GenericUtils.size(expected);
diff --git a/sshd-core/src/test/java/org/apache/sshd/LoadTest.java b/sshd-core/src/test/java/org/apache/sshd/LoadTest.java
index cacf0dd..4948fe0 100644
--- a/sshd-core/src/test/java/org/apache/sshd/LoadTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/LoadTest.java
@@ -37,11 +37,14 @@ import org.apache.sshd.client.session.ClientSession;
 import org.apache.sshd.common.channel.Channel;
 import org.apache.sshd.common.cipher.BuiltinCiphers;
 import org.apache.sshd.common.kex.BuiltinDHFactories;
+import org.apache.sshd.common.util.security.SecurityUtils;
 import org.apache.sshd.core.CoreModuleProperties;
 import org.apache.sshd.server.SshServer;
 import org.apache.sshd.util.test.BaseTestSupport;
 import org.junit.After;
+import org.junit.Assume;
 import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
 import org.junit.Test;
 import org.junit.runners.MethodSorters;
@@ -56,9 +59,14 @@ public class LoadTest extends BaseTestSupport {
         super();
     }
 
+    @BeforeClass    // FIXME inexplicably these tests fail without BC since SSHD-1004
+    public static void ensureBouncycastleRegistered() {
+        Assume.assumeTrue("Requires BC security provider", SecurityUtils.isBouncyCastleRegistered());
+    }
+
     @Before
     public void setUp() throws Exception {
-        sshd = setupTestServer();
+        sshd = setupTestFullSupportServer();
         sshd.start();
         port = sshd.getPort();
     }
@@ -116,7 +124,7 @@ public class LoadTest extends BaseTestSupport {
 
     @SuppressWarnings("checkstyle:nestedtrydepth")
     protected void runClient(String msg) throws Exception {
-        try (SshClient client = setupTestClient()) {
+        try (SshClient client = setupTestFullSupportClient()) {
             CoreModuleProperties.MAX_PACKET_SIZE.set(client, 1024L * 16);
             CoreModuleProperties.WINDOW_SIZE.set(client, 1024L * 8);
             client.setKeyExchangeFactories(Collections.singletonList(ClientBuilder.DH2KEX.apply(BuiltinDHFactories.dhg1)));
diff --git a/sshd-core/src/test/java/org/apache/sshd/client/ClientTest.java b/sshd-core/src/test/java/org/apache/sshd/client/ClientTest.java
index 30c6030..c7487f6 100644
--- a/sshd-core/src/test/java/org/apache/sshd/client/ClientTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/client/ClientTest.java
@@ -74,7 +74,6 @@ import org.apache.sshd.common.SshException;
 import org.apache.sshd.common.channel.Channel;
 import org.apache.sshd.common.channel.ChannelListener;
 import org.apache.sshd.common.channel.exception.SshChannelClosedException;
-import org.apache.sshd.common.config.keys.KeyUtils;
 import org.apache.sshd.common.future.CloseFuture;
 import org.apache.sshd.common.future.SshFutureListener;
 import org.apache.sshd.common.io.IoInputStream;
@@ -92,6 +91,7 @@ import org.apache.sshd.common.util.buffer.Buffer;
 import org.apache.sshd.common.util.buffer.ByteArrayBuffer;
 import org.apache.sshd.common.util.io.NoCloseOutputStream;
 import org.apache.sshd.common.util.net.SshdSocketAddress;
+import org.apache.sshd.common.util.security.SecurityUtils;
 import org.apache.sshd.core.CoreModuleProperties;
 import org.apache.sshd.server.SshServer;
 import org.apache.sshd.server.auth.keyboard.DefaultKeyboardInteractiveAuthenticator;
@@ -108,11 +108,14 @@ import org.apache.sshd.server.session.ServerUserAuthService;
 import org.apache.sshd.server.session.ServerUserAuthServiceFactory;
 import org.apache.sshd.util.test.AsyncEchoShellFactory;
 import org.apache.sshd.util.test.BaseTestSupport;
+import org.apache.sshd.util.test.CommonTestSupportUtils;
 import org.apache.sshd.util.test.EchoShell;
 import org.apache.sshd.util.test.EchoShellFactory;
 import org.apache.sshd.util.test.TeeOutputStream;
 import org.junit.After;
+import org.junit.Assume;
 import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
 import org.junit.Ignore;
 import org.junit.Test;
@@ -170,6 +173,11 @@ public class ClientTest extends BaseTestSupport {
         super();
     }
 
+    @BeforeClass    // FIXME inexplicably these tests fail without BC since SSHD-1004
+    public static void ensureBouncycastleRegistered() {
+        Assume.assumeTrue("Requires BC security provider", SecurityUtils.isBouncyCastleRegistered());
+    }
+
     @Before
     public void setUp() throws Exception {
         authLatch = new CountDownLatch(0);
@@ -1038,7 +1046,7 @@ public class ClientTest extends BaseTestSupport {
                 .verify(CONNECT_TIMEOUT).getSession()) {
             assertNotNull("Client session creation not signalled", clientSessionHolder.get());
             KeyPairProvider keys = createTestHostKeyProvider();
-            session.addPublicKeyIdentity(keys.loadKey(session, KeyPairProvider.SSH_RSA));
+            session.addPublicKeyIdentity(keys.loadKey(session, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE));
             session.auth().verify(AUTH_TIMEOUT);
         } finally {
             client.stop();
@@ -1049,10 +1057,11 @@ public class ClientTest extends BaseTestSupport {
     @Test
     public void testPublicKeyAuthNewWithFailureOnFirstIdentity() throws Exception {
         SimpleGeneratorHostKeyProvider provider = new SimpleGeneratorHostKeyProvider();
-        provider.setAlgorithm(KeyUtils.RSA_ALGORITHM);
+        provider.setAlgorithm(CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM);
+        provider.setKeySize(CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_SIZE);
 
         KeyPairProvider keys = createTestHostKeyProvider();
-        KeyPair pair = keys.loadKey(null, KeyPairProvider.SSH_RSA);
+        KeyPair pair = keys.loadKey(null, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE);
         sshd.setPublickeyAuthenticator((username, key, session) -> key.equals(pair.getPublic()));
         client.setUserAuthFactories(Collections.singletonList(UserAuthPublicKeyFactory.INSTANCE));
         client.start();
@@ -1060,7 +1069,7 @@ public class ClientTest extends BaseTestSupport {
         try (ClientSession session = client.connect(getCurrentTestName(), TEST_LOCALHOST, port)
                 .verify(CONNECT_TIMEOUT).getSession()) {
             assertNotNull("Client session creation not signalled", clientSessionHolder.get());
-            session.addPublicKeyIdentity(provider.loadKey(session, KeyPairProvider.SSH_RSA));
+            session.addPublicKeyIdentity(provider.loadKey(session, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE));
             session.addPublicKeyIdentity(pair);
             session.auth().verify(AUTH_TIMEOUT);
         } finally {
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/SshBuilderTest.java b/sshd-core/src/test/java/org/apache/sshd/common/SshBuilderTest.java
index 4de6a13..736a94a 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/SshBuilderTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/SshBuilderTest.java
@@ -26,9 +26,7 @@ import java.util.Set;
 import org.apache.sshd.common.cipher.BuiltinCiphers;
 import org.apache.sshd.common.cipher.Cipher;
 import org.apache.sshd.common.mac.BuiltinMacs;
-import org.apache.sshd.common.signature.BuiltinSignatures;
 import org.apache.sshd.common.util.GenericUtils;
-import org.apache.sshd.server.ServerBuilder;
 import org.apache.sshd.util.test.BaseTestSupport;
 import org.apache.sshd.util.test.NoIoTestCase;
 import org.junit.FixMethodOrder;
@@ -54,15 +52,6 @@ public class SshBuilderTest extends BaseTestSupport {
         testAllInstancesListed(BuiltinMacs.VALUES, BaseBuilder.DEFAULT_MAC_PREFERENCE);
     }
 
-    /**
-     * Make sure that all values in {@link BuiltinSignatures} are listed in
-     * {@link ServerBuilder#DEFAULT_SIGNATURE_PREFERENCE}
-     */
-    @Test
-    public void testAllBuiltinSignaturesListed() {
-        testAllInstancesListed(BuiltinSignatures.VALUES, ServerBuilder.DEFAULT_SIGNATURE_PREFERENCE);
-    }
-
     private static <
             E extends Enum<E>> void testAllInstancesListed(Set<? extends E> expValues, Collection<? extends E> actValues) {
         assertEquals("Mismatched actual values size", expValues.size(), actValues.size());
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/auth/AuthenticationTest.java b/sshd-core/src/test/java/org/apache/sshd/common/auth/AuthenticationTest.java
index 04149dd..0e748d8 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/auth/AuthenticationTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/auth/AuthenticationTest.java
@@ -85,6 +85,7 @@ import org.apache.sshd.server.session.ServerSessionImpl;
 import org.apache.sshd.server.session.SessionFactory;
 import org.apache.sshd.util.test.BaseTestSupport;
 import org.apache.sshd.util.test.CommonTestSupportUtils;
+import org.apache.sshd.util.test.CoreTestSupportUtils;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.FixMethodOrder;
@@ -310,7 +311,7 @@ public class AuthenticationTest extends BaseTestSupport {
                 assertFalse("Timeout while waiting for session", result.contains(ClientSession.ClientSessionEvent.TIMEOUT));
 
                 KeyPairProvider provider = createTestHostKeyProvider();
-                KeyPair pair = provider.loadKey(s, KeyPairProvider.SSH_RSA);
+                KeyPair pair = provider.loadKey(s, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE);
                 try {
                     assertAuthenticationResult(UserAuthMethodFactory.PUBLIC_KEY,
                             authPublicKey(s, getCurrentTestName(), pair), false);
@@ -382,7 +383,7 @@ public class AuthenticationTest extends BaseTestSupport {
                 assertFalse("Timeout while waiting for session", result.contains(ClientSession.ClientSessionEvent.TIMEOUT));
 
                 KeyPairProvider provider = createTestHostKeyProvider();
-                KeyPair pair = provider.loadKey(s, KeyPairProvider.SSH_RSA);
+                KeyPair pair = provider.loadKey(s, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE);
                 try {
                     assertAuthenticationResult(UserAuthMethodFactory.PUBLIC_KEY,
                             authPublicKey(s, getCurrentTestName(), pair), false);
@@ -656,8 +657,10 @@ public class AuthenticationTest extends BaseTestSupport {
             return true;
         });
 
+        // since we need to use RSA
+        CoreTestSupportUtils.setupFullSignaturesSupport(sshd);
         try (SshClient client = setupTestClient()) {
-            // force server to use only the RSA key
+            // force server to use only RSA
             NamedFactory<Signature> kexSignature = BuiltinSignatures.rsa;
             client.setSignatureFactories(Collections.singletonList(kexSignature));
             client.setServerKeyVerifier((sshClientSession, remoteAddress, serverKey) -> {
@@ -738,7 +741,9 @@ public class AuthenticationTest extends BaseTestSupport {
                 }));
 
         try (SshClient client = setupTestClient()) {
-            KeyPair clientIdentity = CommonTestSupportUtils.generateKeyPair(KeyUtils.RSA_ALGORITHM, 1024);
+            KeyPair clientIdentity = CommonTestSupportUtils.generateKeyPair(
+                    CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM,
+                    CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_SIZE);
             client.start();
 
             try {
@@ -767,7 +772,9 @@ public class AuthenticationTest extends BaseTestSupport {
     public void testHostBasedAuthentication() throws Exception {
         String hostClienUser = getClass().getSimpleName();
         String hostClientName = SshdSocketAddress.toAddressString(SshdSocketAddress.getFirstExternalNetwork4Address());
-        KeyPair hostClientKey = CommonTestSupportUtils.generateKeyPair(KeyUtils.RSA_ALGORITHM, 1024);
+        KeyPair hostClientKey = CommonTestSupportUtils.generateKeyPair(
+                CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM,
+                CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_SIZE);
         AtomicInteger invocationCount = new AtomicInteger(0);
         sshd.setHostBasedAuthenticator((session, username, clientHostKey, clientHostName, clientUsername, certificates) -> {
             invocationCount.incrementAndGet();
@@ -827,8 +834,11 @@ public class AuthenticationTest extends BaseTestSupport {
         sshd.setKeyboardInteractiveAuthenticator(KeyboardInteractiveAuthenticator.NONE);
 
         try (SshClient client = setupTestClient()) {
-            KeyPair kp = CommonTestSupportUtils.generateKeyPair(KeyUtils.RSA_ALGORITHM, 1024);
+            KeyPair kp = CommonTestSupportUtils.generateKeyPair(
+                    CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM,
+                    CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_SIZE);
             client.start();
+
             try {
                 for (int index = 1; index < 3; index++) {
                     try (ClientSession s = client.connect(getCurrentTestName(), TEST_LOCALHOST, port)
@@ -894,7 +904,7 @@ public class AuthenticationTest extends BaseTestSupport {
             try (ClientSession s = client.connect(getCurrentTestName(), TEST_LOCALHOST, port)
                     .verify(CONNECT_TIMEOUT)
                     .getSession()) {
-                String keyLocation = "super-secret-passphrase-RSA-AES-128-key";
+                String keyLocation = "super-secret-passphrase-ec256-key";
                 FilePasswordProvider passwordProvider = new FilePasswordProvider() {
                     @Override
                     @SuppressWarnings("synthetic-access")
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/auth/SinglePublicKeyAuthTest.java b/sshd-core/src/test/java/org/apache/sshd/common/auth/SinglePublicKeyAuthTest.java
index 7bf784a..45678e1 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/auth/SinglePublicKeyAuthTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/auth/SinglePublicKeyAuthTest.java
@@ -32,6 +32,7 @@ import org.apache.sshd.client.session.ClientSession;
 import org.apache.sshd.common.config.keys.KeyUtils;
 import org.apache.sshd.common.keyprovider.KeyPairProvider;
 import org.apache.sshd.common.session.Session;
+import org.apache.sshd.common.util.security.SecurityUtils;
 import org.apache.sshd.core.CoreModuleProperties;
 import org.apache.sshd.server.SshServer;
 import org.apache.sshd.server.auth.pubkey.CachingPublicKeyAuthenticator;
@@ -40,8 +41,11 @@ import org.apache.sshd.server.auth.pubkey.UserAuthPublicKeyFactory;
 import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider;
 import org.apache.sshd.server.session.ServerSession;
 import org.apache.sshd.util.test.BaseTestSupport;
+import org.apache.sshd.util.test.CommonTestSupportUtils;
 import org.junit.After;
+import org.junit.Assume;
 import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
 import org.junit.Test;
 import org.junit.runners.MethodSorters;
@@ -53,21 +57,29 @@ import org.junit.runners.MethodSorters;
 public class SinglePublicKeyAuthTest extends BaseTestSupport {
     private SshServer sshd;
     private int port;
-    private final KeyPair pairRsaGood;
-    private KeyPair pairRsaBad;
+    private final KeyPair kpGood;
+    private final KeyPair kpBad;
     private PublickeyAuthenticator delegate;
 
     public SinglePublicKeyAuthTest() throws IOException, GeneralSecurityException {
         SimpleGeneratorHostKeyProvider provider = new SimpleGeneratorHostKeyProvider();
-        provider.setAlgorithm(KeyUtils.RSA_ALGORITHM);
-        pairRsaBad = provider.loadKey(null, KeyPairProvider.SSH_RSA);
+        provider.setAlgorithm(CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_PROVIDER_ALGORITHM);
+        provider.setKeySize(CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_SIZE);
+        provider.setPath(detectTargetFolder().resolve(getClass().getSimpleName() + "-key"));
+
+        kpBad = provider.loadKey(null, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE);
         KeyPairProvider badKeys = createTestHostKeyProvider();
-        pairRsaGood = badKeys.loadKey(null, KeyPairProvider.SSH_RSA);
+        kpGood = badKeys.loadKey(null, CommonTestSupportUtils.DEFAULT_TEST_HOST_KEY_TYPE);
+    }
+
+    @BeforeClass    // FIXME inexplicably these tests fail without BC since SSHD-1004
+    public static void ensureBouncycastleRegistered() {
+        Assume.assumeTrue("Requires BC security provider", SecurityUtils.isBouncyCastleRegistered());
     }
 
     @Before
     public void setUp() throws Exception {
-        sshd = setupTestServer();
+        sshd = setupTestFullSupportServer();
         CoreModuleProperties.AUTH_METHODS.set(sshd, UserAuthPublicKeyFactory.NAME);
         sshd.setPublickeyAuthenticator((username, key, session) -> delegate.authenticate(username, key, session));
         sshd.start();
@@ -88,7 +100,7 @@ public class SinglePublicKeyAuthTest extends BaseTestSupport {
             String fp = KeyUtils.getFingerPrint(key);
             AtomicInteger counter = count.computeIfAbsent(fp, k -> new AtomicInteger());
             counter.incrementAndGet();
-            return key.equals(pairRsaGood.getPublic());
+            return key.equals(kpGood.getPublic());
         });
         delegate = auth;
 
@@ -97,8 +109,8 @@ public class SinglePublicKeyAuthTest extends BaseTestSupport {
 
             try (ClientSession session
                     = client.connect(getCurrentTestName(), TEST_LOCALHOST, port).verify(CONNECT_TIMEOUT).getSession()) {
-                session.addPublicKeyIdentity(pairRsaBad);
-                session.addPublicKeyIdentity(pairRsaGood);
+                session.addPublicKeyIdentity(kpBad);
+                session.addPublicKeyIdentity(kpGood);
                 session.auth().verify(AUTH_TIMEOUT);
 
                 assertEquals("Mismatched authentication invocations count", 2, count.size());
@@ -106,12 +118,12 @@ public class SinglePublicKeyAuthTest extends BaseTestSupport {
                 Map<Session, Map<PublicKey, Boolean>> cache = auth.getCache();
                 assertEquals("Mismatched cache size", 1, cache.size());
 
-                String fpBad = KeyUtils.getFingerPrint(pairRsaBad.getPublic());
+                String fpBad = KeyUtils.getFingerPrint(kpBad.getPublic());
                 AtomicInteger badCounter = count.get(fpBad);
                 assertNotNull("Missing bad public key", badCounter);
                 assertEquals("Mismatched bad key authentication attempts", 1, badCounter.get());
 
-                String fpGood = KeyUtils.getFingerPrint(pairRsaGood.getPublic());
+                String fpGood = KeyUtils.getFingerPrint(kpGood.getPublic());
                 AtomicInteger goodCounter = count.get(fpGood);
                 assertNotNull("Missing good public key", goodCounter);
                 assertEquals("Mismatched good key authentication attempts", 1, goodCounter.get());
@@ -128,7 +140,7 @@ public class SinglePublicKeyAuthTest extends BaseTestSupport {
             String fp = KeyUtils.getFingerPrint(key);
             AtomicInteger counter = count.computeIfAbsent(fp, k -> new AtomicInteger());
             counter.incrementAndGet();
-            return key.equals(pairRsaGood.getPublic());
+            return key.equals(kpGood.getPublic());
         };
 
         try (SshClient client = setupTestClient()) {
@@ -136,8 +148,8 @@ public class SinglePublicKeyAuthTest extends BaseTestSupport {
 
             try (ClientSession session
                     = client.connect(getCurrentTestName(), TEST_LOCALHOST, port).verify(CONNECT_TIMEOUT).getSession()) {
-                session.addPublicKeyIdentity(pairRsaBad);
-                session.addPublicKeyIdentity(pairRsaGood);
+                session.addPublicKeyIdentity(kpBad);
+                session.addPublicKeyIdentity(kpGood);
 
                 AuthFuture auth = session.auth();
                 assertTrue("Failed to authenticate on time", auth.await(AUTH_TIMEOUT));
@@ -149,14 +161,14 @@ public class SinglePublicKeyAuthTest extends BaseTestSupport {
 
         assertEquals("Mismatched attempted keys count", 2, count.size());
 
-        String badFingerPrint = KeyUtils.getFingerPrint(pairRsaBad.getPublic());
+        String badFingerPrint = KeyUtils.getFingerPrint(kpBad.getPublic());
         Number badIndex = count.get(badFingerPrint);
-        assertNotNull("Missing bad RSA key", badIndex);
+        assertNotNull("Missing bad key", badIndex);
         assertEquals("Mismatched attempt index for bad key", 1, badIndex.intValue());
 
-        String goodFingerPrint = KeyUtils.getFingerPrint(pairRsaGood.getPublic());
+        String goodFingerPrint = KeyUtils.getFingerPrint(kpGood.getPublic());
         Number goodIndex = count.get(goodFingerPrint);
-        assertNotNull("Missing good RSA key", goodIndex);
+        assertNotNull("Missing good key", goodIndex);
         assertEquals("Mismatched attempt index for good key", 2, goodIndex.intValue());
     }
 
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/config/SshConfigFileReaderTest.java b/sshd-core/src/test/java/org/apache/sshd/common/config/SshConfigFileReaderTest.java
index 62c55c8..c137b8d 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/config/SshConfigFileReaderTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/config/SshConfigFileReaderTest.java
@@ -30,7 +30,6 @@ import java.util.List;
 import java.util.Properties;
 import java.util.function.Function;
 
-import org.apache.sshd.client.ClientBuilder;
 import org.apache.sshd.common.BaseBuilder;
 import org.apache.sshd.common.Closeable;
 import org.apache.sshd.common.FactoryManager;
@@ -102,7 +101,7 @@ public class SshConfigFileReaderTest extends BaseTestSupport {
 
     @Test
     public void testParseSignaturesList() {
-        List<? extends NamedResource> expected = ClientBuilder.DEFAULT_SIGNATURE_PREFERENCE;
+        List<? extends NamedResource> expected = BaseBuilder.DEFAULT_SIGNATURE_PREFERENCE;
         Properties props = initNamedResourceProperties(ConfigFileReaderSupport.HOST_KEY_ALGORITHMS_CONFIG_PROP, expected);
         BuiltinSignatures.ParseResult result
                 = SshConfigFileReader.getSignatures(PropertyResolverUtils.toPropertyResolver(props));
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/forward/PortForwardingLoadTest.java b/sshd-core/src/test/java/org/apache/sshd/common/forward/PortForwardingLoadTest.java
index 8b1e535..65d51a5 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/forward/PortForwardingLoadTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/forward/PortForwardingLoadTest.java
@@ -50,6 +50,7 @@ import org.apache.mina.core.service.IoHandlerAdapter;
 import org.apache.mina.core.session.IoSession;
 import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
 import org.apache.sshd.common.util.net.SshdSocketAddress;
+import org.apache.sshd.common.util.security.SecurityUtils;
 import org.apache.sshd.core.CoreModuleProperties;
 import org.apache.sshd.server.SshServer;
 import org.apache.sshd.server.forward.AcceptAllForwardingFilter;
@@ -58,6 +59,7 @@ import org.apache.sshd.util.test.CoreTestSupportUtils;
 import org.apache.sshd.util.test.JSchLogger;
 import org.apache.sshd.util.test.SimpleUserInfo;
 import org.junit.After;
+import org.junit.Assume;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
@@ -151,6 +153,8 @@ public class PortForwardingLoadTest extends BaseTestSupport {
 
     @BeforeClass
     public static void jschInit() {
+        // FIXME inexplicably these tests fail without BC since SSHD-1004
+        Assume.assumeTrue("Requires BC security provider", SecurityUtils.isBouncyCastleRegistered());
         JSchLogger.init();
     }
 
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/mac/MacCompatibilityTest.java b/sshd-core/src/test/java/org/apache/sshd/common/mac/MacCompatibilityTest.java
index 31d6b42..692a229 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/mac/MacCompatibilityTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/mac/MacCompatibilityTest.java
@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -32,8 +33,10 @@ import ch.ethz.ssh2.Connection;
 import ch.ethz.ssh2.ConnectionInfo;
 import com.jcraft.jsch.JSch;
 import org.apache.sshd.common.channel.Channel;
+import org.apache.sshd.common.config.keys.KeyUtils;
 import org.apache.sshd.common.util.GenericUtils;
 import org.apache.sshd.server.SshServer;
+import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider;
 import org.apache.sshd.util.test.BaseTestSupport;
 import org.apache.sshd.util.test.CommonTestSupportUtils;
 import org.apache.sshd.util.test.CoreTestSupportUtils;
@@ -118,9 +121,21 @@ public class MacCompatibilityTest extends BaseTestSupport {
     @BeforeClass
     public static void setupClientAndServer() throws Exception {
         JSchLogger.init();
+        setupClientAndServer(MacCompatibilityTest.class);
+    }
+
+    private static void setupClientAndServer(Class<?> anchor) throws Exception {
+        sshd = CoreTestSupportUtils.setupTestFullSupportServer(anchor);
+
+        // Need to use RSA since Ganymede does not support EC
+        SimpleGeneratorHostKeyProvider provider = new SimpleGeneratorHostKeyProvider();
+        provider.setAlgorithm(KeyUtils.RSA_ALGORITHM);
+        provider.setKeySize(1024);
+
+        Path targetDir = CommonTestSupportUtils.detectTargetFolder(anchor);
+        provider.setPath(targetDir.resolve(anchor.getSimpleName() + "-key"));
 
-        sshd = CoreTestSupportUtils.setupTestFullSupportServer(MacCompatibilityTest.class);
-        sshd.setKeyPairProvider(CommonTestSupportUtils.createTestHostKeyProvider(MacCompatibilityTest.class));
+        sshd.setKeyPairProvider(provider);
         sshd.start();
         port = sshd.getPort();
     }
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/signature/OpenSSHCertificateTest.java b/sshd-core/src/test/java/org/apache/sshd/common/signature/OpenSSHCertificateTest.java
index 0609692..2c5ce16 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/signature/OpenSSHCertificateTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/signature/OpenSSHCertificateTest.java
@@ -38,6 +38,7 @@ import org.apache.sshd.util.test.BaseTestSupport;
 import org.apache.sshd.util.test.CoreTestSupportUtils;
 import org.apache.sshd.util.test.JUnit4ClassRunnerWithParametersFactory;
 import org.junit.AfterClass;
+import org.junit.Assume;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
@@ -70,11 +71,11 @@ public class OpenSSHCertificateTest extends BaseTestSupport {
 
     @BeforeClass
     public static void setupClientAndServer() throws Exception {
-        sshd = CoreTestSupportUtils.setupTestServer(OpenSSHCertificateTest.class);
+        sshd = CoreTestSupportUtils.setupTestFullSupportServer(OpenSSHCertificateTest.class);
         sshd.start();
         port = sshd.getPort();
 
-        client = CoreTestSupportUtils.setupTestClient(OpenSSHCertificateTest.class);
+        client = CoreTestSupportUtils.setupTestFullSupportClient(OpenSSHCertificateTest.class);
         client.start();
         defaultSignatureFactories = client.getSignatureFactories();
     }
@@ -158,6 +159,8 @@ public class OpenSSHCertificateTest extends BaseTestSupport {
 
     @Test // invalid principal, abort
     public void testAbortOnInvalidPrincipal() throws Exception {
+        Assume.assumeTrue("Have signature factory", signatureFactory != null);
+
         CoreModuleProperties.ABORT_ON_INVALID_CERTIFICATE.set(client, true);
         try (ClientSession s = client.connect(getCurrentTestName(), "localhost", port)
                 .verify(CONNECT_TIMEOUT)
diff --git a/sshd-core/src/test/java/org/apache/sshd/common/signature/SignatureFactoriesTest.java b/sshd-core/src/test/java/org/apache/sshd/common/signature/SignatureFactoriesTest.java
index a9e76ed..2809bcd 100644
--- a/sshd-core/src/test/java/org/apache/sshd/common/signature/SignatureFactoriesTest.java
+++ b/sshd-core/src/test/java/org/apache/sshd/common/signature/SignatureFactoriesTest.java
@@ -121,11 +121,11 @@ public class SignatureFactoriesTest extends BaseTestSupport implements KeyTypeIn
 
     @BeforeClass
     public static void setupClientAndServer() throws Exception {
-        sshd = CoreTestSupportUtils.setupTestServer(SignatureFactoriesTest.class);
+        sshd = CoreTestSupportUtils.setupTestFullSupportServer(SignatureFactoriesTest.class);
         sshd.start();
         port = sshd.getPort();
 
-        client = CoreTestSupportUtils.setupTestClient(SignatureFactoriesTest.class);
+        client = CoreTestSupportUtils.setupTestFullSupportClient(SignatureFactoriesTest.class);
         client.start();
     }
 
diff --git a/sshd-core/src/test/java/org/apache/sshd/util/test/CoreTestSupportUtils.java b/sshd-core/src/test/java/org/apache/sshd/util/test/CoreTestSupportUtils.java
index 1621405..4ad8967 100644
--- a/sshd-core/src/test/java/org/apache/sshd/util/test/CoreTestSupportUtils.java
+++ b/sshd-core/src/test/java/org/apache/sshd/util/test/CoreTestSupportUtils.java
@@ -21,14 +21,17 @@ package org.apache.sshd.util.test;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
+import java.util.ArrayList;
 
 import org.apache.sshd.client.ClientBuilder;
 import org.apache.sshd.client.SshClient;
 import org.apache.sshd.client.config.hosts.HostConfigEntryResolver;
 import org.apache.sshd.client.keyverifier.AcceptAllServerKeyVerifier;
 import org.apache.sshd.common.NamedFactory;
+import org.apache.sshd.common.helpers.AbstractFactoryManager;
 import org.apache.sshd.common.kex.BuiltinDHFactories;
 import org.apache.sshd.common.keyprovider.KeyIdentityProvider;
+import org.apache.sshd.common.signature.BuiltinSignatures;
 import org.apache.sshd.server.ServerBuilder;
 import org.apache.sshd.server.SshServer;
 import org.apache.sshd.server.auth.pubkey.AcceptAllPublickeyAuthenticator;
@@ -63,6 +66,7 @@ public final class CoreTestSupportUtils {
     public static SshClient setupTestFullSupportClient(SshClient client) {
         client.setKeyExchangeFactories(
                 NamedFactory.setUpTransformedFactories(false, BuiltinDHFactories.VALUES, ClientBuilder.DH2KEX));
+        setupFullSignaturesSupport(client);
         return client;
     }
 
@@ -85,6 +89,12 @@ public final class CoreTestSupportUtils {
     public static SshServer setupTestFullSupportServer(SshServer sshd) {
         sshd.setKeyExchangeFactories(
                 NamedFactory.setUpTransformedFactories(false, BuiltinDHFactories.VALUES, ServerBuilder.DH2KEX));
+        setupFullSignaturesSupport(sshd);
         return sshd;
     }
+
+    public static <M extends AbstractFactoryManager> M setupFullSignaturesSupport(M manager) {
+        manager.setSignatureFactories(new ArrayList<>(BuiltinSignatures.VALUES));
+        return manager;
+    }
 }
diff --git a/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-RSA-AES-128-key b/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-RSA-AES-128-key
deleted file mode 100644
index 2b93a42..0000000
--- a/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-RSA-AES-128-key
+++ /dev/null
@@ -1,30 +0,0 @@
------BEGIN RSA PRIVATE KEY-----
-Proc-Type: 4,ENCRYPTED
-DEK-Info: AES-128-CBC,D41AC063160FCC09B1E1931FB43BCEAA
-
-V218dGT2pUpimnwEVn+2ljvK6mvm2aNLlaakMunlHfIswrakJ1WTs8a61pYILOn9
-MGHrCiqe6ZI7FBJ2wXpSxhcuM3fzk6/dW4Ghh4EHG1Y94w97EizxNfyz/iI2XQw0
-i6ttaDLVzP8UcSRElqG+Zpe1A7EE/DkdkXD3f/DaGHtu1zirVeaEIggMLjfTdwnR
-sH9VnUZhe74VdPV0x16h7JjLt5fcbIjqJ6NWW4QvQpPBv3k0oiUy/nP4FXg1b7VW
-7SowuCPi+mF821hj4xSO8ETlAU1eZdtgXqtejtKm0iDtsjnTBZPvDDrq5ephBlxO
-k7JBJG1LFUiDIGnpxos5nCsKEo8UAw9a5/D4xE3C6UTocXon28XGzVCbkZBN6jcd
-UbpjCVwKMJmFL97487u9S57xrGTmJdi1AtF9Rei8juTTQY4+r3l2c7JtdtcbLUhj
-iLvdYnbh6kUEyE19/+omJaWGQlFhYp7ZMRRQSiz6TD8lhSIBPpXzs+uMfhkrifVk
-3WpjRoikmPOOFLtecee5Rp+SpGd700XgLnxwZ47l0FNfrKKqd3+nZX4JILQ2M0JP
-sBx8gcIew8aUqMzWrwZxbrt9Pd1+2kSNVG9hpLoNoA4WpQnYQMo4L0eTCeMNUOap
-f9H0Hh3QnqXTPHbcYZJCGE2RUxLzn/d7rUxUdEzER+pkhJcw9JbV/izTrpDHs9bM
-cfBLggQvs+UIBww2OFz2BztwoQzsSEuNW/SxG/y6SfRUQq5TZw9NxYnrrqfBXKtx
-svB1JVbn2fKq2Lvi8AZ1fF3tyrNot/tptDf0yDHejWDUvVx5cXsKVK2BbVjbZ88k
-mBtUbw7ea9Ev7ZsihNB2EdhPjLhhKlKLIZznPKeXL3GDTXqCgCxTVh4wLvaR8rDU
-C3Isil4WprCeynmZpOe7bxAZDm2QCobnDB8sLQqBI4zgH8X/1iyXJVdSKfK9vxcB
-sJ5pYCcS2q0C+CJkn6HVTlMQ5CyyzvPaDJukJoxwxsZ5hgCsUHFzrvyGnXqGfTBD
-qEW+oA7cj48CfweV5pXHj+mZpCrpn1zRVJRz4h1FZRsttPGtBRAlns5I3kh5BPRs
-4m1BO1jiWyp/7HkUrDRhEf/QeJsP+mTH32pQgnngZ/AGA0PUcKanMUpe1d2ju83V
-EIcTz9ycTHPiOAM6GaVt54fKj9WRBU+7pf14ZdJmfhp6twc0jNtaTh+/I6Pfb0jN
-0d6yKV//pOeJJBNhuOJgm/0vfkOnOojIJchOQCRt5Lg/a4fD/JXtLOed2zOQa+0J
-3d8Y93mQX/iN1wi95/sG79YBYF3FkJYVhjosSKbiIaxIn76zIx4IAlziycDKvgpr
-JgZcVvCDc4flwrf3Cv/uHK7UWOE+16X1CfAy8JzFg5bhiMmhgsJyHmd+zDGrY6NX
-zz+wLmwOenEwC40gpt89OXbgMcwJMtfiSusatRtZ+AAs0jb/8jExVXfcYE3m3r1/
-FqLZ7seTQT2D01YoPlwUtSPxzaZbziAJ/NaGmURnBGVibDCJxwUAiOSIQH4prIfg
-Q2FCJeMTbLV43Lanlby5nrmLkzsw3uo1MO8Of1DbcnVUHNSwrp/nNzrYdxBLIvqS
------END RSA PRIVATE KEY-----
diff --git a/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-RSA-AES-128-key.pub b/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-RSA-AES-128-key.pub
deleted file mode 100644
index b1d66a6..0000000
--- a/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-RSA-AES-128-key.pub
+++ /dev/null
@@ -1 +0,0 @@
-ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC/oDbs/yYxBdT02ldP6JIrcETJQ+TCml1tHYuo8cIQp0DZCgRZiEZ4foucAT8R/vLK01nnjRzrI42MXiCzyAHb1sPRD0Fsbpa4TFJczPBBRM2mp56airnArQUMmg/ZKlOf82hn+u7Kgn+ljyjYG5FrdoUBju62i0H4+oBfX+pTkd5ruUgqLyPUC3qtNLwjS4PIPAda/pfpsi9UawQ4ommWCCLlwK55NiSrPDBwKNuVWROcQps2NZRxzRLQEiiCEVBEdiUqqUQ+dg2beLV/4cCS860ZZRvCfe+ko8TUBJ7SLtcrvOEYJOKIZDVhcnQKN/wyXCHExSYytUconlFn/9YX root@devenv-aas
\ No newline at end of file
diff --git a/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-ec256-key b/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-ec256-key
new file mode 100644
index 0000000..0e7e94a
--- /dev/null
+++ b/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-ec256-key
@@ -0,0 +1,10 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAACmFlczI1Ni1jdHIAAAAGYmNyeXB0AAAAGAAAABCBJIf6Vh
+Kbhk1+gmJsv6C6AAAAEAAAAAEAAABoAAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlz
+dHAyNTYAAABBBL01p9qPAsYum1h7HXFpbvwIWyb7CbzbQK5qlo97xbPgYxguslezrgZZZg
+ITFVlzECSiXIpReOFQ0bZW78fo3D0AAADAgtIDr0uiaUbj81kc5vLKhTEKJ7x0uzbDQ0ga
+yKiwkK6gr1kes6k0HBtuBN2hh/Dr5qJ4Tnh3yMXsXiC+gjf+OOVGM7qK6XcxUFFG5LsfbN
+YlB3cOuhdCzgJJm6fyo77V3ZTyXcDIvChPrUWJ+R011SLND11JwCaIUia10QuWrWlHEBdU
+f0Zq5nrcbcCq0jEXtLDSrUDtok/aYeGXU+WLv64CxH2ytG6RRsGIkHcHwXEn5Yun6FwIyG
+ujI82JomIM
+-----END OPENSSH PRIVATE KEY-----
diff --git a/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-ec256-key.pub b/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-ec256-key.pub
new file mode 100644
index 0000000..7ea5d70
--- /dev/null
+++ b/sshd-core/src/test/resources/org/apache/sshd/common/auth/super-secret-passphrase-ec256-key.pub
@@ -0,0 +1 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBL01p9qPAsYum1h7HXFpbvwIWyb7CbzbQK5qlo97xbPgYxguslezrgZZZgITFVlzECSiXIpReOFQ0bZW78fo3D0= lgoldstein@LYORPC-A8133U7
diff --git a/sshd-scp/src/test/java/org/apache/sshd/scp/client/ScpTest.java b/sshd-scp/src/test/java/org/apache/sshd/scp/client/ScpTest.java
index 2cc5972..5e0ec88 100644
--- a/sshd-scp/src/test/java/org/apache/sshd/scp/client/ScpTest.java
+++ b/sshd-scp/src/test/java/org/apache/sshd/scp/client/ScpTest.java
@@ -50,6 +50,7 @@ import org.apache.sshd.client.SshClient;
 import org.apache.sshd.client.session.ClientSession;
 import org.apache.sshd.common.Factory;
 import org.apache.sshd.common.channel.Channel;
+import org.apache.sshd.common.config.keys.KeyUtils;
 import org.apache.sshd.common.file.FileSystemFactory;
 import org.apache.sshd.common.file.virtualfs.VirtualFileSystemFactory;
 import org.apache.sshd.common.io.BuiltinIoServiceFactoryFactories;
@@ -70,6 +71,7 @@ import org.apache.sshd.scp.server.ScpCommandFactory;
 import org.apache.sshd.server.SshServer;
 import org.apache.sshd.server.channel.ChannelSession;
 import org.apache.sshd.server.command.Command;
+import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider;
 import org.apache.sshd.util.test.BaseTestSupport;
 import org.apache.sshd.util.test.CommonTestSupportUtils;
 import org.apache.sshd.util.test.CoreTestSupportUtils;
@@ -148,14 +150,27 @@ public class ScpTest extends BaseTestSupport {
     @BeforeClass
     public static void setupClientAndServer() throws Exception {
         JSchLogger.init();
-        sshd = CoreTestSupportUtils.setupTestFullSupportServer(ScpTest.class);
+        setupClientAndServer(ScpTest.class);
+    }
+
+    protected static void setupClientAndServer(Class<?> anchor) throws Exception {
+        // Need to use RSA since Ganymede does not support EC
+        SimpleGeneratorHostKeyProvider provider = new SimpleGeneratorHostKeyProvider();
+        provider.setAlgorithm(KeyUtils.RSA_ALGORITHM);
+        provider.setKeySize(1024);
+
+        Path targetDir = CommonTestSupportUtils.detectTargetFolder(anchor);
+        provider.setPath(targetDir.resolve(anchor.getSimpleName() + "-key"));
+        sshd = CoreTestSupportUtils.setupTestFullSupportServer(anchor);
+        sshd.setKeyPairProvider(provider);
+
         ScpCommandFactory factory = new ScpCommandFactory();
         sshd.setCommandFactory(factory);
         sshd.setShellFactory(factory);
         sshd.start();
         port = sshd.getPort();
 
-        client = CoreTestSupportUtils.setupTestFullSupportClient(ScpTest.class);
+        client = CoreTestSupportUtils.setupTestFullSupportClient(anchor);
         client.start();
     }