feat: enable bouncy castle for sftp (#1227)

Author: bajrangCoder

src/plugins/sftp/plugin.xml

@@ -26,4 +26,5 @@
 
     <framework src="commons-io:commons-io:2.11.0" />
     <framework src="com.sshtools:maverick-synergy-client:3.1.2" />
+    <framework src="com.sshtools:maverick-bc:3.1.2" />
 </plugin>

src/plugins/sftp/src/com/foxdebug/sftp/Sftp.java

@@ -19,6 +19,7 @@
 import com.sshtools.common.sftp.SftpStatusException;
 import com.sshtools.common.ssh.SshException;
 import com.sshtools.common.ssh.components.SshKeyPair;
+import com.sshtools.common.ssh.components.jce.JCEProvider;
 import com.sshtools.common.util.FileUtils;
 import java.io.File;
 import java.io.IOException;
@@ -94,6 +95,7 @@ public void run() {
               int port = args.optInt(1);
               String username = args.optString(2);
               String password = args.optString(3);
+              JCEProvider.enableBouncyCastle(true);
               Log.d(
                 TAG,
                 "Connecting to " + host + ":" + port + " as " + username
@@ -176,6 +178,8 @@ public void run() {
               ContentResolver contentResolver = context.getContentResolver();
               InputStream in = contentResolver.openInputStream(uri);
 
+              JCEProvider.enableBouncyCastle(true);
+
               SshKeyPair keyPair = null;
               try {
                 keyPair = SshKeyUtils.getPrivateKey(in, passphrase);