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package de.blinkt.openvpn.fragments;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.util.Base64;
import android.webkit.MimeTypeMap;
import java.io.*;
import java.util.TreeSet;
import java.util.Vector;
public class Utils {
@TargetApi(Build.VERSION_CODES.KITKAT)
public static Intent getFilePickerIntent(FileType fileType) {
Intent i = new Intent(Intent.ACTION_OPEN_DOCUMENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
TreeSet<String> supportedMimeTypes = new TreeSet<String>();
Vector<String> extensions = new Vector<String>();
switch (fileType) {
case PKCS12:
i.setType("application/x-pkcs12");
supportedMimeTypes.add("application/x-pkcs12");
extensions.add("p12");
extensions.add("pfx");
break;
case CERTIFICATE:
i.setType("application/x-pem-file");
supportedMimeTypes.add("application/x-x509-ca-cert");
supportedMimeTypes.add("application/x-x509-user-cert");
supportedMimeTypes.add("application/x-pem-file");
supportedMimeTypes.add("text/plain");
extensions.add("pem");
extensions.add("crt");
break;
case KEYFILE:
i.setType("application/x-pem-file");
supportedMimeTypes.add("application/x-pem-file");
supportedMimeTypes.add("application/pkcs8");
extensions.add("key");
break;
case OVPN_CONFIG:
i.setType("application/x-openvpn-profile");
supportedMimeTypes.add("application/x-openvpn-profile");
supportedMimeTypes.add("application/openvpn-profile");
supportedMimeTypes.add("application/ovpn");
extensions.add("ovpn");
extensions.add("conf");
break;
case TLS_AUTH_FILE:
i.setType("text/plain");
// Backup ....
supportedMimeTypes.add("application/pkcs8");
extensions.add("txt");
extensions.add("key");
break;
}
MimeTypeMap mtm = MimeTypeMap.getSingleton();
for (String ext : extensions) {
String mimeType = mtm.getMimeTypeFromExtension(ext);
if (mimeType != null)
supportedMimeTypes.add(mimeType);
else
supportedMimeTypes.add("application/octet-stream");
}
i.putExtra(Intent.EXTRA_MIME_TYPES, supportedMimeTypes.toArray(new String[supportedMimeTypes.size()]));
return i;
}
public enum FileType {
PKCS12,
CERTIFICATE,
OVPN_CONFIG,
KEYFILE,
TLS_AUTH_FILE
}
static private byte[] readBytesFromStream(InputStream input) throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
byte[] data = new byte[16384];
while ((nRead = input.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
input.close();
return buffer.toByteArray();
}
public static String getStringFromFilePickerResult(FileType ft, Intent result, Context c) throws IOException {
Uri uri = result.getData();
if (uri ==null)
return null;
byte[] fileData = readBytesFromStream(c.getContentResolver().openInputStream(uri));
String newData = null;
switch (ft) {
case PKCS12:
newData = Base64.encodeToString(fileData, Base64.DEFAULT);
break;
default:
newData = new String(fileData, "UTF-8");
break;
}
return newData;
}
}
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