msb-public
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FairEmail
mirror of https://github.com/M66B/FairEmail.git
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Code Issues Projects Releases Wiki Activity

Better decryption handling

Browse Source 
Refs #66
pull/91/head
M66B 6 years ago
parent b68aba25b7
commit 7e3f4563d1
2 changed files with 291 additions and 196 deletions
Show Stats Download Patch File Download Diff File

55
app/src/main/java/eu/faircode/email/AdapterAttachment.java
Unescape View File

@ -156,31 +156,38 @@ public class AdapterAttachment extends RecyclerView.Adapter<AdapterAttachment.Vi
// Build file name
File file = EntityAttachment.getFile(context, attachment.id);
// https://developer.android.com/reference/android/support/v4/content/FileProvider
Uri uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID, file);
Log.i(Helper.TAG, "uri=" + uri);
// Build intent
final Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, attachment.type);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Log.i(Helper.TAG, "Sharing " + file + " type=" + attachment.type);
Log.i(Helper.TAG, "Intent=" + intent);
// Set permissions
List<ResolveInfo> targets = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : targets) {
Log.i(Helper.TAG, "Target=" + resolveInfo);
context.grantUriPermission(resolveInfo.activityInfo.packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
if ("encrypted.asc".equals(attachment.name)) {
Intent intent = new Intent(FragmentMessage.ACTION_DECRYPT_MESSAGE);
intent.putExtra("file", file);
LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);
lbm.sendBroadcast(intent);
} else {
// https://developer.android.com/reference/android/support/v4/content/FileProvider
Uri uri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID, file);
Log.i(Helper.TAG, "uri=" + uri);
// Build intent
final Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, attachment.type);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Log.i(Helper.TAG, "Sharing " + file + " type=" + attachment.type);
Log.i(Helper.TAG, "Intent=" + intent);
// Set permissions
List<ResolveInfo> targets = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : targets) {
Log.i(Helper.TAG, "Target=" + resolveInfo);
context.grantUriPermission(resolveInfo.activityInfo.packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
// Check if viewer available
if (targets.size() == 0) {
Toast.makeText(context, context.getString(R.string.title_no_viewer, attachment.type), Toast.LENGTH_LONG).show();
return;
}
context.startActivity(intent);
}
// Check if viewer available
if (targets.size() == 0) {
Toast.makeText(context, context.getString(R.string.title_no_viewer, attachment.type), Toast.LENGTH_LONG).show();
return;
}
context.startActivity(intent);
} else {
if (attachment.progress == null) {
Bundle args = new Bundle();

432
app/src/main/java/eu/faircode/email/FragmentMessage.java
Unescape View File

@ -20,9 +20,11 @@ package eu.faircode.email;
*/
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
@ -37,8 +39,10 @@ import android.text.Html;
import android.text.Layout;
import android.text.Spannable;
import android.text.Spanned;
import android.text.SpannedString;
import android.text.TextUtils;
import android.text.method.LinkMovementMethod;
import android.text.style.ImageSpan;
import android.text.style.URLSpan;
import android.util.Log;
import android.view.LayoutInflater;
@ -82,7 +86,11 @@ import java.util.Date;
import java.util.List;
import java.util.Locale;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.InternetHeaders;
import javax.mail.internet.MimeBodyPart;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
@ -137,6 +145,7 @@ public class FragmentMessage extends FragmentEx {
private DateFormat df = SimpleDateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
private static final long CACHE_IMAGE_DURATION = 3 * 24 * 3600 * 1000L;
static final String ACTION_DECRYPT_MESSAGE = BuildConfig.APPLICATION_ID + ".DECRYPT_MESSAGEs";
@Override
public void onCreate(Bundle savedInstanceState) {
@ -151,6 +160,21 @@ public class FragmentMessage extends FragmentEx {
openPgpConnection.bindToService();
}
@Override
public void onResume() {
super.onResume();
LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(getContext());
IntentFilter iff = new IntentFilter(ACTION_DECRYPT_MESSAGE);
lbm.registerReceiver(receiver, iff);
}
@Override
public void onPause() {
super.onPause();
LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(getContext());
lbm.unregisterReceiver(receiver);
}
@Override
public void onDestroy() {
super.onDestroy();
@ -409,121 +433,9 @@ public class FragmentMessage extends FragmentEx {
// Spanned text needs to be loaded after recreation too
final Bundle args = new Bundle();
args.putLong("id", message.id);
args.putBoolean("has_images", false);
args.putBoolean("show_images", false);
pbBody.setVisibility(View.VISIBLE);
final SimpleTask<Spanned> bodyTask = new SimpleTask<Spanned>() {
@Override
protected Spanned onLoad(final Context context, final Bundle args) throws Throwable {
final long id = args.getLong("id");
final boolean show_images = args.getBoolean("show_images");
String body = (decrypted == null ? message.read(context) : decrypted);
args.putInt("size", body.length());
return Html.fromHtml(HtmlHelper.sanitize(getContext(), body, false), new Html.ImageGetter() {
@Override
public Drawable getDrawable(String source) {
float scale = context.getResources().getDisplayMetrics().density;
int px = (int) (24 * scale + 0.5f);
if (show_images) {
// Get cache folder
File dir = new File(context.getCacheDir(), "images");
dir.mkdir();
// Cleanup cache
long now = new Date().getTime();
File[] images = dir.listFiles();
if (images != null)
for (File image : images)
if (image.isFile() && image.lastModified() + CACHE_IMAGE_DURATION < now) {
Log.i(Helper.TAG, "Deleting from image cache " + image.getName());
image.delete();
}
// Create unique file name
File file = new File(dir, id + "_" + source.hashCode());
InputStream is = null;
FileOutputStream os = null;
try {
// Get input stream
if (file.exists()) {
Log.i(Helper.TAG, "Using cached " + file);
is = new FileInputStream(file);
} else {
Log.i(Helper.TAG, "Downloading " + source);
is = new URL(source).openStream();
}
// Decode image from stream
Bitmap bm = BitmapFactory.decodeStream(is);
if (bm == null)
throw new IllegalArgumentException();
// Cache bitmap
if (!file.exists()) {
os = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.PNG, 100, os);
}
// Create drawable from bitmap
Drawable d = new BitmapDrawable(context.getResources(), bm);
d.setBounds(0, 0, bm.getWidth(), bm.getHeight());
return d;
} catch (Throwable ex) {
// Show warning icon
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
Drawable d = context.getResources().getDrawable(R.drawable.baseline_warning_24, context.getTheme());
d.setBounds(0, 0, px, px);
return d;
} finally {
// Close streams
if (is != null) {
try {
is.close();
} catch (IOException e) {
Log.w(Helper.TAG, e + "\n" + Log.getStackTraceString(e));
}
}
if (os != null) {
try {
os.close();
} catch (IOException e) {
Log.w(Helper.TAG, e + "\n" + Log.getStackTraceString(e));
}
}
}
} else {
// Show placeholder icon
args.putBoolean("has_images", true);
Drawable d = context.getResources().getDrawable(R.drawable.baseline_image_24, context.getTheme());
d.setBounds(0, 0, px, px);
return d;
}
}
}, new Html.TagHandler() {
@Override
public void handleTag(boolean opening, String tag, Editable output, XMLReader xmlReader) {
Log.i(Helper.TAG, "HTML tag=" + tag + " opening=" + opening);
}
});
}
@Override
protected void onLoaded(Bundle args, Spanned body) {
boolean has_images = args.getBoolean("has_images");
boolean show_images = args.getBoolean("show_images");
tvSize.setText(Helper.humanReadableByteCount(args.getInt("size"), false));
tvBody.setText(body);
tvBody.setTag(true);
btnImages.setVisibility(has_images && !show_images ? View.VISIBLE : View.GONE);
grpMessage.setVisibility(View.VISIBLE);
fab.setVisibility(free ? View.GONE : View.VISIBLE);
pbBody.setVisibility(View.GONE);
}
};
bodyTask.load(FragmentMessage.this, args);
@ -761,79 +673,24 @@ public class FragmentMessage extends FragmentEx {
}
private void onMenuDecrypt() {
Log.i(Helper.TAG, "On decrypt");
if (!PreferenceManager.getDefaultSharedPreferences(getContext()).getBoolean("pro", false)) {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.content_frame, new FragmentPro()).addToBackStack("pro");
fragmentTransaction.commit();
return;
}
try {
if (openPgpConnection == null || !openPgpConnection.isBound())
throw new IllegalArgumentException(getString(R.string.title_no_openpgp));
if (message.to == null || message.to.length == 0)
throw new IllegalArgumentException(getString(R.string.title_to_missing));
// Find encrypted message
String begin = "-----BEGIN PGP MESSAGE-----";
String end = "-----END PGP MESSAGE-----";
Document document = Jsoup.parse(message.read(getContext()));
String encrypted = document.text();
int efrom = encrypted.indexOf(begin) + begin.length();
int eto = encrypted.indexOf(end);
if (efrom < 0 || eto < 0)
throw new IllegalArgumentException(getString(R.string.title_not_encrypted));
encrypted = begin + "\n" + encrypted.substring(efrom, eto).replace(" ", "\n") + end + "\n";
final InputStream is = new ByteArrayInputStream(encrypted.getBytes("UTF-8"));
final ByteArrayOutputStream os = new ByteArrayOutputStream();
InternetAddress to = (InternetAddress) message.to[0];
encrypted = begin + "\n" + encrypted.substring(efrom, eto).replace(" ", "\n") + end + "\n";
InputStream is = new ByteArrayInputStream(encrypted.getBytes("UTF-8"));
Intent data = new Intent();
data.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
data.putExtra(OpenPgpApi.EXTRA_USER_IDS, new String[]{to.getAddress()});
decrypt(is, false);
OpenPgpApi api = new OpenPgpApi(getContext(), openPgpConnection.getService());
api.executeApiAsync(data, is, os, new OpenPgpApi.IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
try {
int code = result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR);
switch (code) {
case OpenPgpApi.RESULT_CODE_SUCCESS: {
Log.i(Helper.TAG, "Decrypted");
FragmentMessage.this.decrypted = os.toString("UTF-8");
getActivity().invalidateOptionsMenu();
tvBody.setText(decrypted);
break;
}
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: {
Log.i(Helper.TAG, "User interaction");
PendingIntent pi = result.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
startIntentSenderForResult(
pi.getIntentSender(),
ActivityView.REQUEST_OPENPGP,
null, 0, 0, 0,
new Bundle());
break;
}
case OpenPgpApi.RESULT_CODE_ERROR: {
OpenPgpError error = result.getParcelableExtra(OpenPgpApi.RESULT_ERROR);
throw new IllegalArgumentException(error.getMessage());
}
}
} catch (Throwable ex) {
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
if (ex instanceof IllegalArgumentException)
Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
else
Toast.makeText(getContext(), ex.toString(), Toast.LENGTH_LONG).show();
}
}
});
} catch (Throwable ex) {
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
if (ex instanceof IllegalArgumentException)
@ -1173,4 +1030,235 @@ public class FragmentMessage extends FragmentEx {
.putExtra("action", "reply")
.putExtra("reference", message.id));
}
SimpleTask<Spanned> bodyTask = new SimpleTask<Spanned>() {
@Override
protected Spanned onLoad(final Context context, final Bundle args) throws Throwable {
final long id = args.getLong("id");
final boolean show_images = args.getBoolean("show_images");
String body = (decrypted == null ? message.read(context) : decrypted);
args.putInt("size", body.length());
return decodeHtml(context, id, body, show_images);
}
@Override
protected void onLoaded(Bundle args, Spanned body) {
boolean show_images = args.getBoolean("show_images");
SpannedString ss = new SpannedString(body);
boolean has_images = (ss.getSpans(0, ss.length(), ImageSpan.class).length > 0);
tvSize.setText(Helper.humanReadableByteCount(args.getInt("size"), false));
tvBody.setText(body);
tvBody.setTag(true);
btnImages.setVisibility(has_images && !show_images ? View.VISIBLE : View.GONE);
grpMessage.setVisibility(View.VISIBLE);
fab.setVisibility(free ? View.GONE : View.VISIBLE);
pbBody.setVisibility(View.GONE);
}
};
private static Spanned decodeHtml(final Context context, final long id, String body, final boolean show_images) {
Spanned result = Html.fromHtml(HtmlHelper.sanitize(context, body, false), new Html.ImageGetter() {
@Override
public Drawable getDrawable(String source) {
float scale = context.getResources().getDisplayMetrics().density;
int px = (int) (24 * scale + 0.5f);
if (show_images) {
// Get cache folder
File dir = new File(context.getCacheDir(), "images");
dir.mkdir();
// Cleanup cache
long now = new Date().getTime();
File[] images = dir.listFiles();
if (images != null)
for (File image : images)
if (image.isFile() && image.lastModified() + CACHE_IMAGE_DURATION < now) {
Log.i(Helper.TAG, "Deleting from image cache " + image.getName());
image.delete();
}
// Create unique file name
File file = new File(dir, id + "_" + source.hashCode());
InputStream is = null;
FileOutputStream os = null;
try {
// Get input stream
if (file.exists()) {
Log.i(Helper.TAG, "Using cached " + file);
is = new FileInputStream(file);
} else {
Log.i(Helper.TAG, "Downloading " + source);
is = new URL(source).openStream();
}
// Decode image from stream
Bitmap bm = BitmapFactory.decodeStream(is);
if (bm == null)
throw new IllegalArgumentException();
// Cache bitmap
if (!file.exists()) {
os = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.PNG, 100, os);
}
// Create drawable from bitmap
Drawable d = new BitmapDrawable(context.getResources(), bm);
d.setBounds(0, 0, bm.getWidth(), bm.getHeight());
return d;
} catch (Throwable ex) {
// Show warning icon
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
Drawable d = context.getResources().getDrawable(R.drawable.baseline_warning_24, context.getTheme());
d.setBounds(0, 0, px, px);
return d;
} finally {
// Close streams
if (is != null) {
try {
is.close();
} catch (IOException e) {
Log.w(Helper.TAG, e + "\n" + Log.getStackTraceString(e));
}
}
if (os != null) {
try {
os.close();
} catch (IOException e) {
Log.w(Helper.TAG, e + "\n" + Log.getStackTraceString(e));
}
}
}
} else {
// Show placeholder icon
Drawable d = context.getResources().getDrawable(R.drawable.baseline_image_24, context.getTheme());
d.setBounds(0, 0, px, px);
return d;
}
}
}, new Html.TagHandler() {
@Override
public void handleTag(boolean opening, String tag, Editable output, XMLReader xmlReader) {
Log.i(Helper.TAG, "HTML tag=" + tag + " opening=" + opening);
}
});
return result;
}
private void decrypt(InputStream is, final boolean isPart) {
Log.i(Helper.TAG, "On decrypt");
if (!PreferenceManager.getDefaultSharedPreferences(getContext()).getBoolean("pro", false)) {
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.content_frame, new FragmentPro()).addToBackStack("pro");
fragmentTransaction.commit();
return;
}
if (openPgpConnection == null || !openPgpConnection.isBound())
throw new IllegalArgumentException(getString(R.string.title_no_openpgp));
if (message.to == null || message.to.length == 0)
throw new IllegalArgumentException(getString(R.string.title_to_missing));
final ByteArrayOutputStream os = new ByteArrayOutputStream();
InternetAddress to = (InternetAddress) message.to[0];
Intent data = new Intent();
data.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
data.putExtra(OpenPgpApi.EXTRA_USER_IDS, new String[]{to.getAddress()});
OpenPgpApi api = new OpenPgpApi(getContext(), openPgpConnection.getService());
api.executeApiAsync(data, is, os, new OpenPgpApi.IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
try {
int code = result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR);
switch (code) {
case OpenPgpApi.RESULT_CODE_SUCCESS: {
Log.i(Helper.TAG, "Decrypted");
String decrypted = os.toString("UTF-8");
if (isPart) {
String plain = null;
String html = null;
InternetHeaders ih = new InternetHeaders();
ih.addHeader("Content-Type", "multipart/alternative");
MimeBodyPart part = new MimeBodyPart(ih, decrypted.getBytes());
Multipart mp = (Multipart) part.getContent();
for (int i = 0; i < mp.getCount(); i++) {
Part bp = mp.getBodyPart(i);
if (bp.isMimeType("text/plain"))
plain = bp.getContent().toString();
else if (bp.isMimeType("text/html"))
html = bp.getContent().toString();
}
if (html != null)
FragmentMessage.this.decrypted = html;
else if (plain != null)
FragmentMessage.this.decrypted = "<pre>" + plain.replaceAll("\\r?\\n", "<br />") + "</pre>";
} else
FragmentMessage.this.decrypted = "<pre>" + decrypted.replaceAll("\\r?\\n", "<br />") + "</pre>";
getActivity().invalidateOptionsMenu();
Bundle args = new Bundle();
args.putLong("id", message.id);
args.putBoolean("show_images", false);
pbBody.setVisibility(View.VISIBLE);
bodyTask.load(FragmentMessage.this, args);
break;
}
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: {
Log.i(Helper.TAG, "User interaction");
PendingIntent pi = result.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
startIntentSenderForResult(
pi.getIntentSender(),
ActivityView.REQUEST_OPENPGP,
null, 0, 0, 0,
new Bundle());
break;
}
case OpenPgpApi.RESULT_CODE_ERROR: {
OpenPgpError error = result.getParcelableExtra(OpenPgpApi.RESULT_ERROR);
throw new IllegalArgumentException(error.getMessage());
}
}
} catch (Throwable ex) {
Log.e(Helper.TAG, ex + "\n" + Log.getStackTraceString(ex));
if (ex instanceof IllegalArgumentException)
Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
else
Toast.makeText(getContext(), ex.toString(), Toast.LENGTH_LONG).show();
}
}
});
}
BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
new SimpleTask<InputStream>() {
@Override
protected InputStream onLoad(Context context, Bundle args) throws Throwable {
File file = (File) args.getSerializable("file");
FileInputStream fis = new FileInputStream(file);
return fis;
}
@Override
protected void onLoaded(Bundle args, InputStream data) {
decrypt(data, true);
}
}.load(FragmentMessage.this, intent.getExtras());
}
};
}

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