trying to add support for various source and destination modes for encryption and decryption (String, byte[], filename, content stream), also more Intent options added

src/org/thialfihar/android/apg/Apg.java

@@ -117,7 +117,9 @@ public class Apg {
     public static final String EXTRA_STATUS = "status";
     public static final String EXTRA_ERROR = "error";
     public static final String EXTRA_DECRYPTED_MESSAGE = "decryptedMessage";
+    public static final String EXTRA_DECRYPTED_DATA = "decryptedData";
     public static final String EXTRA_ENCRYPTED_MESSAGE = "encryptedMessage";
+    public static final String EXTRA_ENCRYPTED_DATA = "encryptedData";
     public static final String EXTRA_RESULT_URI = "resultUri";
     public static final String EXTRA_SIGNATURE = "signature";
     public static final String EXTRA_SIGNATURE_KEY_ID = "signatureKeyId";
@@ -135,6 +137,8 @@ public class Apg {
     public static final String EXTRA_PROGRESS = "progress";
     public static final String EXTRA_MAX = "max";
     public static final String EXTRA_ACCOUNT = "account";
+    public static final String EXTRA_ASCII_ARMOUR = "asciiArmour";
+    public static final String EXTRA_BINARY = "binary";
 
     public static final String AUTHORITY = DataProvider.AUTHORITY;
 
@@ -576,7 +580,7 @@ public class Apg {
     }
 
     public static Bundle importKeyRings(Activity context, int type,
-                                        InputStream inStream, long dataLength,
+                                        InputData data,
                                         ProgressDialogUpdater progress)
             throws GeneralException, FileNotFoundException, PGPException, IOException {
         Bundle returnData = new Bundle();
@@ -591,7 +595,7 @@ public class Apg {
             throw new GeneralException(context.getString(R.string.error_externalStorageNotReady));
         }
 
-        PositionAwareInputStream progressIn = new PositionAwareInputStream(inStream);
+        PositionAwareInputStream progressIn = new PositionAwareInputStream(data.getInputStream());
         // need to have access to the bufferedInput, so we can reuse it for the possible
         // PGPObject chunks after the first one, e.g. files with several consecutive ASCII
         // armour blocks
@@ -637,7 +641,7 @@ public class Apg {
                     } else if (retValue == Id.return_value.ok) {
                         ++newKeys;
                     }
-                    progress.setProgress((int)(100 * progressIn.position() / dataLength), 100);
+                    progress.setProgress((int)(100 * progressIn.position() / data.getSize()), 100);
                     obj = objectFactory.nextObject();
                 }
             }
@@ -1110,8 +1114,7 @@ public class Apg {
     }
 
     public static void encrypt(Context context,
-                               InputStream inStream, OutputStream outStream,
+                               InputData data, OutputStream outStream,
-                               long dataLength,
                                boolean armored,
                                long encryptionKeyIds[], long signatureKeyId,
                                String signaturePassPhrase,
@@ -1213,14 +1216,15 @@ public class Apg {
         long done = 0;
         int n = 0;
         byte[] buffer = new byte[1 << 16];
-        while ((n = inStream.read(buffer)) > 0) {
+        InputStream in = data.getInputStream();
+        while ((n = in.read(buffer)) > 0) {
             pOut.write(buffer, 0, n);
             if (signatureKeyId != 0) {
                 signatureGenerator.update(buffer, 0, n);
             }
             done += n;
-            if (dataLength != 0) {
+            if (data.getSize() != 0) {
-                progress.setProgress((int) (20 + (95 - 20) * done / dataLength), 100);
+                progress.setProgress((int) (20 + (95 - 20) * done / data.getSize()), 100);
             }
         }
 
@@ -1242,7 +1246,7 @@ public class Apg {
     }
 
     public static void signText(Context context,
-                                InputStream inStream, OutputStream outStream,
+                                InputData data, OutputStream outStream,
                                 long signatureKeyId, String signaturePassPhrase,
                                 int hashAlgorithm,
                                 ProgressDialogUpdater progress)
@@ -1294,6 +1298,7 @@ public class Apg {
         armorOut.beginClearText(hashAlgorithm);
 
         ByteArrayOutputStream lineOut = new ByteArrayOutputStream();
+        InputStream inStream = data.getInputStream();
         int lookAhead = readInputLine(lineOut, inStream);
 
         processLine(armorOut, signatureGenerator, lineOut.toByteArray());
@@ -1319,9 +1324,9 @@ public class Apg {
         progress.setProgress(R.string.progress_done, 100, 100);
     }
 
-    public static long getDecryptionKeyId(Context context, InputStream inStream)
+    public static long getDecryptionKeyId(Context context, InputData data)
             throws GeneralException, NoAsymmetricEncryptionException, IOException {
-        InputStream in = PGPUtil.getDecoderStream(inStream);
+        InputStream in = PGPUtil.getDecoderStream(data.getInputStream());
         PGPObjectFactory pgpF = new PGPObjectFactory(in);
         PGPEncryptedDataList enc;
         Object o = pgpF.nextObject();
@@ -1365,9 +1370,9 @@ public class Apg {
         return secretKey.getKeyID();
     }
 
-    public static boolean hasSymmetricEncryption(Context context, InputStream inStream)
+    public static boolean hasSymmetricEncryption(Context context, InputData data)
             throws GeneralException, IOException {
-        InputStream in = PGPUtil.getDecoderStream(inStream);
+        InputStream in = PGPUtil.getDecoderStream(data.getInputStream());
         PGPObjectFactory pgpF = new PGPObjectFactory(in);
         PGPEncryptedDataList enc;
         Object o = pgpF.nextObject();
@@ -1395,8 +1400,7 @@ public class Apg {
     }
 
     public static Bundle decrypt(Context context,
-                                 PositionAwareInputStream inStream, OutputStream outStream,
+                                 InputData data, OutputStream outStream,
-                                 long dataLength,
                                  String passPhrase, ProgressDialogUpdater progress,
                                  boolean assumeSymmetric)
             throws IOException, GeneralException, PGPException, SignatureException {
@@ -1404,7 +1408,7 @@ public class Apg {
             passPhrase = "";
         }
         Bundle returnData = new Bundle();
-        InputStream in = PGPUtil.getDecoderStream(inStream);
+        InputStream in = PGPUtil.getDecoderStream(data.getInputStream());
         PGPObjectFactory pgpF = new PGPObjectFactory(in);
         PGPEncryptedDataList enc;
         Object o = pgpF.nextObject();
@@ -1557,7 +1561,7 @@ public class Apg {
             }
             int n = 0;
             int done = 0;
-            long startPos = inStream.position();
+            long startPos = data.getStreamPosition();
             while ((n = dataIn.read(buffer)) > 0) {
                 out.write(buffer, 0, n);
                 done += n;
@@ -1571,11 +1575,11 @@ public class Apg {
                 }
                 // unknown size, but try to at least have a moving, slowing down progress bar
                 currentProgress = startProgress + (endProgress - startProgress) * done / (done + 100000);
-                if (dataLength - startPos == 0) {
+                if (data.getSize() - startPos == 0) {
                     currentProgress = endProgress;
                 } else {
                     currentProgress = (int)(startProgress + (endProgress - startProgress) *
-                                        (inStream.position() - startPos) / (dataLength - startPos));
+                                        (data.getStreamPosition() - startPos) / (data.getSize() - startPos));
                 }
                 progress.setProgress(currentProgress, 100);
             }
@@ -1609,13 +1613,13 @@ public class Apg {
     }
 
     public static Bundle verifyText(Context context,
-                                    InputStream inStream, OutputStream outStream,
+                                    InputData data, OutputStream outStream,
                                     ProgressDialogUpdater progress)
             throws IOException, GeneralException, PGPException, SignatureException {
         Bundle returnData = new Bundle();
 
         ByteArrayOutputStream out = new ByteArrayOutputStream();
-        ArmoredInputStream aIn = new ArmoredInputStream(inStream);
+        ArmoredInputStream aIn = new ArmoredInputStream(data.getInputStream());
 
         progress.setProgress(R.string.progress_done, 0, 100);
 

src/org/thialfihar/android/apg/DataDestination.java

@@ -0,0 +1,79 @@
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.thialfihar.android.apg.Apg.GeneralException;
+
+import android.content.Context;
+import android.os.Environment;
+
+public class DataDestination {
+    private String mStreamFilename;
+    private String mFilename;
+    private int mMode = Id.mode.undefined;
+
+    public DataDestination() {
+
+    }
+
+    public void setMode(int mode) {
+        mMode = mode;
+    }
+
+    public void setFilename(String filename) {
+        mFilename = filename;
+    }
+
+    public String getStreamFilename() {
+        return mStreamFilename;
+    }
+
+    protected OutputStream getOutputStream(Context context)
+            throws Apg.GeneralException, FileNotFoundException, IOException {
+        OutputStream out = null;
+        mStreamFilename = null;
+
+        switch (mMode) {
+            case Id.mode.stream: {
+                try {
+                    while (true) {
+                        mStreamFilename = Apg.generateRandomString(32);
+                        if (mStreamFilename == null) {
+                            throw new Apg.GeneralException("couldn't generate random file name");
+                        }
+                        context.openFileInput(mStreamFilename).close();
+                    }
+                } catch (FileNotFoundException e) {
+                    // found a name that isn't used yet
+                }
+                out = context.openFileOutput(mStreamFilename, Context.MODE_PRIVATE);
+                break;
+            }
+
+            case Id.mode.byte_array: {
+                out = new ByteArrayOutputStream();
+                break;
+            }
+
+            case Id.mode.file: {
+                if (mFilename.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
+                    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+                        throw new GeneralException(context.getString(R.string.error_externalStorageNotReady));
+                    }
+                }
+                out = new FileOutputStream(mFilename);
+                break;
+            }
+
+            default: {
+                break;
+            }
+        }
+
+        return out;
+    }
+}

src/org/thialfihar/android/apg/DataSource.java

@@ -0,0 +1,88 @@
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.thialfihar.android.apg.Apg.GeneralException;
+
+import android.content.Context;
+import android.net.Uri;
+import android.os.Environment;
+
+public class DataSource {
+    private Uri mContentUri = null;
+    private String mText = null;
+    private byte[] mData = null;
+
+    public DataSource() {
+
+    }
+
+    public void setUri(Uri uri) {
+        mContentUri = uri;
+    }
+
+    public void setUri(String uri) {
+        if (uri.startsWith("/")) {
+            setUri(Uri.parse("file://" + uri));
+        } else {
+            setUri(Uri.parse(uri));
+        }
+    }
+
+    public void setText(String text) {
+        mText = text;
+    }
+
+    public void setData(byte[] data) {
+        mData = data;
+    }
+
+    public InputData getInputData(Context context, boolean withSize)
+            throws GeneralException, FileNotFoundException, IOException {
+        InputStream in = null;
+        long size = 0;
+
+        if (mContentUri != null) {
+            if (mContentUri.getScheme().equals("file")) {
+                // get the rest after "file://"
+                String path = mContentUri.toString().substring(6);
+                if (path.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
+                    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+                        throw new GeneralException(context.getString(R.string.error_externalStorageNotReady));
+                    }
+                }
+                in = new FileInputStream(path);
+                File file = new File(path);
+                if (withSize) {
+                    size = file.length();
+                }
+            } else {
+                in = context.getContentResolver().openInputStream(mContentUri);
+                if (withSize) {
+                    InputStream tmp = context.getContentResolver().openInputStream(mContentUri);
+                    size = Apg.getLengthOfStream(tmp);
+                    tmp.close();
+                }
+            }
+        } else if (mText != null || mData != null) {
+            byte[] bytes = null;
+            if (mData != null) {
+                bytes = mData;
+            } else {
+                bytes = mText.getBytes();
+            }
+            in = new ByteArrayInputStream(bytes);
+            if (withSize) {
+                size = bytes.length;
+            }
+        }
+
+        return new InputData(in, size);
+    }
+
+}

src/org/thialfihar/android/apg/DecryptActivity.java

@@ -16,12 +16,9 @@
 
 package org.thialfihar.android.apg;
 
-import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -88,6 +85,11 @@ public class DecryptActivity extends BaseActivity {
     private String mOutputFilename = null;
 
     private Uri mContentUri = null;
+    private byte[] mData = null;
+    private boolean mReturnBinary = false;
+
+    private DataSource mDataSource = null;
+    private DataDestination mDataDestination = null;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
@@ -186,21 +188,26 @@ public class DecryptActivity extends BaseActivity {
             if (extras == null) {
                 extras = new Bundle();
             }
-            String data = extras.getString(Apg.EXTRA_TEXT);
+
-            if (data != null) {
+            mData = extras.getByteArray(Apg.EXTRA_DATA);
-                Matcher matcher = Apg.PGP_MESSAGE.matcher(data);
+            String textData = null;
+            if (mData == null) {
+                textData = extras.getString(Apg.EXTRA_TEXT);
+            }
+            if (textData != null) {
+                Matcher matcher = Apg.PGP_MESSAGE.matcher(textData);
                 if (matcher.matches()) {
-                    data = matcher.group(1);
+                    textData = matcher.group(1);
                     // replace non breakable spaces
-                    data = data.replaceAll("\\xa0", " ");
+                    textData = textData.replaceAll("\\xa0", " ");
-                    mMessage.setText(data);
+                    mMessage.setText(textData);
                 } else {
-                    matcher = Apg.PGP_SIGNED_MESSAGE.matcher(data);
+                    matcher = Apg.PGP_SIGNED_MESSAGE.matcher(textData);
                     if (matcher.matches()) {
-                        data = matcher.group(1);
+                        textData = matcher.group(1);
                         // replace non breakable spaces
-                        data = data.replaceAll("\\xa0", " ");
+                        textData = textData.replaceAll("\\xa0", " ");
-                        mMessage.setText(data);
+                        mMessage.setText(textData);
                         mDecryptButton.setText(R.string.btn_verify);
                     }
                 }
@@ -208,15 +215,12 @@ public class DecryptActivity extends BaseActivity {
             mReplyTo = extras.getString(Apg.EXTRA_REPLY_TO);
             mSubject = extras.getString(Apg.EXTRA_SUBJECT);
         } else if (Apg.Intent.DECRYPT_FILE.equals(mIntent.getAction())) {
+            mInputFilename = mIntent.getDataString();
             if ("file".equals(mIntent.getScheme())) {
-                mInputFilename = mIntent.getDataString().replace("file://", "");
+                mInputFilename = mInputFilename.substring(6);
-                mFilename.setText(mInputFilename);
-                guessOutputFilename();
-            } else if ("content".equals(mIntent.getScheme())) {
-                mInputFilename = mIntent.getDataString();
-                mFilename.setText(mInputFilename);
-                guessOutputFilename();
             }
+            mFilename.setText(mInputFilename);
+            guessOutputFilename();
             mSource.setInAnimation(null);
             mSource.setOutAnimation(null);
             while (mSource.getCurrentView().getId() != R.id.sourceFile) {
@@ -224,11 +228,15 @@ public class DecryptActivity extends BaseActivity {
             }
         } else if (Apg.Intent.DECRYPT_AND_RETURN.equals(mIntent.getAction())) {
             mContentUri = mIntent.getData();
+            Bundle extras = mIntent.getExtras();
+            if (extras == null) {
+                extras = new Bundle();
+            }
+
+            mReturnBinary = extras.getBoolean(Apg.EXTRA_BINARY, false);
+
             if (mContentUri == null) {
-                Bundle extras = mIntent.getExtras();
+                mData = extras.getByteArray(Apg.EXTRA_DATA);
-                if (extras == null) {
-                    extras = new Bundle();
-                }
                 String data = extras.getString(Apg.EXTRA_TEXT);
                 if (data != null) {
                     Matcher matcher = Apg.PGP_MESSAGE.matcher(data);
@@ -397,19 +405,9 @@ public class DecryptActivity extends BaseActivity {
         // else treat it as an decrypted message/file
         mSignedOnly = false;
         String error = null;
+        fillDataSource();
         try {
-            InputStream in;
+            InputData in = mDataSource.getInputData(this, false);
-            if (mContentUri != null) {
-                in = getContentResolver().openInputStream(mContentUri);
-            } else if (mDecryptTarget == Id.target.file) {
-                if (mInputFilename.startsWith("file")) {
-                    in = new FileInputStream(mInputFilename);
-                } else {
-                    in = getContentResolver().openInputStream(Uri.parse(mInputFilename));
-                }
-            } else {
-                in = new ByteArrayInputStream(mMessage.getText().toString().getBytes());
-            }
             try {
                 setSecretKeyId(Apg.getDecryptionKeyId(this, in));
                 if (getSecretKeyId() == Id.key.none) {
@@ -418,19 +416,7 @@ public class DecryptActivity extends BaseActivity {
                 mAssumeSymmetricEncryption = false;
             } catch (Apg.NoAsymmetricEncryptionException e) {
                 setSecretKeyId(Id.key.symmetric);
-                // look at the file/message again to check whether there's
+                in = mDataSource.getInputData(this, false);
-                // symmetric encryption data in there
-                if (mContentUri != null) {
-                    in = getContentResolver().openInputStream(mContentUri);
-                } else if (mDecryptTarget == Id.target.file) {
-                    if (mInputFilename.startsWith("file")) {
-                        in = new FileInputStream(mInputFilename);
-                    } else {
-                        in = getContentResolver().openInputStream(Uri.parse(mInputFilename));
-                    }
-                } else {
-                    in = new ByteArrayInputStream(mMessage.getText().toString().getBytes());
-                }
                 if (!Apg.hasSymmetricEncryption(this, in)) {
                     throw new Apg.GeneralException(getString(R.string.error_noKnownEncryptionFound));
                 }
@@ -500,60 +486,32 @@ public class DecryptActivity extends BaseActivity {
 
         Bundle data = new Bundle();
         Message msg = new Message();
-
+        fillDataSource();
+        fillDataDestination();
         try {
-            PositionAwareInputStream in = null;
+            InputData in = mDataSource.getInputData(this, true);
-            OutputStream out = null;
+            OutputStream out = mDataDestination.getOutputStream(this);
-            String randomString = null;
-            long size = 0;
-
-            if (mContentUri != null) {
-                in = new PositionAwareInputStream(getContentResolver().openInputStream(mContentUri));
-                size = Apg.getLengthOfStream(getContentResolver().openInputStream(mContentUri));
-                try {
-                    while (true) {
-                        randomString = Apg.generateRandomString(32);
-                        if (randomString == null) {
-                            throw new Apg.GeneralException("couldn't generate random file name");
-                        }
-                        this.openFileInput(randomString).close();
-                    }
-                } catch (FileNotFoundException e) {
-                    // found a name that isn't used yet
-                }
-                out = openFileOutput(randomString, MODE_PRIVATE);
-            } else if (mDecryptTarget == Id.target.message) {
-                String messageData = mMessage.getText().toString();
-                in = new PositionAwareInputStream(new ByteArrayInputStream(messageData.getBytes()));
-                out = new ByteArrayOutputStream();
-                size = messageData.getBytes().length;
-            } else {
-                if (mInputFilename.startsWith("content")) {
-                    size = Apg.getLengthOfStream(getContentResolver().openInputStream(Uri.parse(mInputFilename)));
-                    in = new PositionAwareInputStream(
-                            getContentResolver().openInputStream(Uri.parse(mInputFilename)));
-                } else {
-                    in = new PositionAwareInputStream(new FileInputStream(mInputFilename));
-                    File file = new File(mInputFilename);
-                    size = file.length();
-                }
-                out = new FileOutputStream(mOutputFilename);
-            }
 
             if (mSignedOnly) {
                 data = Apg.verifyText(this, in, out, this);
             } else {
-                data = Apg.decrypt(this, in, out, size, Apg.getCachedPassPhrase(getSecretKeyId()),
+                data = Apg.decrypt(this, in, out, Apg.getCachedPassPhrase(getSecretKeyId()),
                                    this, mAssumeSymmetricEncryption);
             }
 
             out.close();
 
-            if (randomString != null) {
+            if (mDataDestination.getStreamFilename() != null) {
-                data.putString(Apg.EXTRA_RESULT_URI, "content://" + DataProvider.AUTHORITY + "/data/" + randomString);
+                data.putString(Apg.EXTRA_RESULT_URI, "content://" + DataProvider.AUTHORITY +
+                               "/data/" + mDataDestination.getStreamFilename());
             } else if (mDecryptTarget == Id.target.message) {
-                data.putString(Apg.EXTRA_DECRYPTED_MESSAGE,
+                if (mReturnBinary) {
-                               new String(((ByteArrayOutputStream) out).toByteArray()));
+                    data.putByteArray(Apg.EXTRA_DECRYPTED_DATA,
+                                      ((ByteArrayOutputStream) out).toByteArray());
+                } else {
+                    data.putString(Apg.EXTRA_DECRYPTED_MESSAGE,
+                                   new String(((ByteArrayOutputStream) out).toByteArray()));
+                }
             }
         } catch (PGPException e) {
             error = "" + e;
@@ -727,4 +685,31 @@ public class DecryptActivity extends BaseActivity {
 
         return super.onCreateDialog(id);
     }
+
+    protected void fillDataSource() {
+        mDataSource = new DataSource();
+        if (mContentUri != null) {
+            mDataSource.setUri(mContentUri);
+        } else if (mDecryptTarget == Id.target.file) {
+            mDataSource.setUri(mInputFilename);
+        } else {
+            if (mData != null) {
+                mDataSource.setData(mData);
+            } else {
+                mDataSource.setText(mMessage.getText().toString());
+            }
+        }
+    }
+
+    protected void fillDataDestination() {
+        mDataDestination = new DataDestination();
+        if (mContentUri != null) {
+            mDataDestination.setMode(Id.mode.stream);
+        } else if (mDecryptTarget == Id.target.file) {
+            mDataDestination.setFilename(mOutputFilename);
+            mDataDestination.setMode(Id.mode.file);
+        } else {
+            mDataDestination.setMode(Id.mode.byte_array);
+        }
+    }
 }

src/org/thialfihar/android/apg/EncryptActivity.java

@@ -16,13 +16,9 @@
 
 package org.thialfihar.android.apg;
 
-import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.security.NoSuchAlgorithmException;
 import java.security.NoSuchProviderException;
@@ -34,8 +30,6 @@ import org.bouncycastle2.openpgp.PGPPublicKey;
 import org.bouncycastle2.openpgp.PGPPublicKeyRing;
 import org.bouncycastle2.openpgp.PGPSecretKey;
 import org.bouncycastle2.openpgp.PGPSecretKeyRing;
-import org.bouncycastle2.util.Strings;
-import org.thialfihar.android.apg.Apg.GeneralException;
 import org.thialfihar.android.apg.utils.Choice;
 
 import android.app.Dialog;
@@ -43,7 +37,6 @@ import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.Environment;
 import android.os.Message;
 import android.text.ClipboardManager;
 import android.view.View;
@@ -100,6 +93,14 @@ public class EncryptActivity extends BaseActivity {
     private String mInputFilename = null;
     private String mOutputFilename = null;
 
+    private boolean mAsciiArmourDemand = false;
+    private boolean mOverrideAsciiArmour = false;
+    private Uri mContentUri = null;
+    private byte[] mData = null;
+
+    private DataSource mDataSource = null;
+    private DataDestination mDataDestination = null;
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -271,6 +272,7 @@ public class EncryptActivity extends BaseActivity {
         if (Apg.Intent.ENCRYPT.equals(mIntent.getAction()) ||
             Apg.Intent.ENCRYPT_FILE.equals(mIntent.getAction()) ||
             Apg.Intent.ENCRYPT_AND_RETURN.equals(mIntent.getAction())) {
+            mContentUri = mIntent.getData();
             Bundle extras = mIntent.getExtras();
             if (extras == null) {
                 extras = new Bundle();
@@ -280,7 +282,17 @@ public class EncryptActivity extends BaseActivity {
                 mReturnResult = true;
             }
 
-            String data = extras.getString(Apg.EXTRA_TEXT);
+            if (extras.containsKey(Apg.EXTRA_ASCII_ARMOUR)) {
+                mAsciiArmourDemand = extras.getBoolean(Apg.EXTRA_ASCII_ARMOUR, true);
+                mOverrideAsciiArmour = true;
+                mAsciiArmour.setChecked(mAsciiArmourDemand);
+            }
+
+            mData = extras.getByteArray(Apg.EXTRA_DATA);
+            String textData = null;
+            if (mData == null) {
+                textData = extras.getString(Apg.EXTRA_TEXT);
+            }
             mSendTo = extras.getString(Apg.EXTRA_SEND_TO);
             mSubject = extras.getString(Apg.EXTRA_SUBJECT);
             long signatureKeyId = extras.getLong(Apg.EXTRA_SIGNATURE_KEY_ID);
@@ -327,8 +339,8 @@ public class EncryptActivity extends BaseActivity {
 
             if (Apg.Intent.ENCRYPT.equals(mIntent.getAction()) ||
                 Apg.Intent.ENCRYPT_AND_RETURN.equals(mIntent.getAction())) {
-                if (data != null) {
+                if (textData != null) {
-                    mMessage.setText(data);
+                    mMessage.setText(textData);
                 }
                 mSource.setInAnimation(null);
                 mSource.setOutAnimation(null);
@@ -548,11 +560,11 @@ public class EncryptActivity extends BaseActivity {
         String error = null;
         Bundle data = new Bundle();
         Message msg = new Message();
-
+        fillDataSource();
+        fillDataDestination();
         try {
-            InputStream in;
+            InputData in;
             OutputStream out;
-            long size;
             boolean useAsciiArmour = true;
             long encryptionKeyIds[] = null;
             long signatureKeyId = 0;
@@ -571,65 +583,28 @@ public class EncryptActivity extends BaseActivity {
                 signOnly = (mEncryptionKeyIds == null || mEncryptionKeyIds.length == 0);
             }
 
+            // streams
+            in = mDataSource.getInputData(this, true);
+            out = mDataDestination.getOutputStream(this);
+
             if (mEncryptTarget == Id.target.file) {
-                if (mInputFilename.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath()) ||
-                    mOutputFilename.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
-                    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
-                        throw new GeneralException(getString(R.string.error_externalStorageNotReady));
-                    }
-                }
-
-                if (mInputFilename.startsWith("content")) {
-                    in = getContentResolver().openInputStream(Uri.parse(mInputFilename));
-                    size = 0;
-                    long n = 0;
-                    byte dummy[] = new byte[0x10000];
-                    while ((n = in.read(dummy)) > 0) {
-                        size += n;
-                    }
-                    in = getContentResolver().openInputStream(Uri.parse(mInputFilename));
-                } else {
-                    in = new FileInputStream(mInputFilename);
-                    File file = new File(mInputFilename);
-                    size = file.length();
-                }
-                out = new FileOutputStream(mOutputFilename);
-
                 useAsciiArmour = mAsciiArmour.isChecked();
                 compressionId = ((Choice) mFileCompression.getSelectedItem()).getId();
             } else {
-                String message = mMessage.getText().toString();
-
-                if (signOnly && !mReturnResult) {
-                    // fix the message a bit, trailing spaces and newlines break stuff,
-                    // because GMail sends as HTML and such things fuck up the signature,
-                    // TODO: things like "<" and ">" also fuck up the signature
-                    message = message.replaceAll(" +\n", "\n");
-                    message = message.replaceAll("\n\n+", "\n\n");
-                    message = message.replaceFirst("^\n+", "");
-                    // make sure there'll be exactly one newline at the end
-                    message = message.replaceFirst("\n*$", "\n");
-                }
-
-                if (signOnly && !message.endsWith("\n")) {
-                    message += '\n';
-                }
-
-                byte[] byteData = Strings.toUTF8ByteArray(message);
-                in = new ByteArrayInputStream(byteData);
-                out = new ByteArrayOutputStream();
-
-                size = byteData.length;
                 useAsciiArmour = true;
                 compressionId = mPreferences.getDefaultMessageCompression();
             }
 
+            if (mOverrideAsciiArmour) {
+                useAsciiArmour = mAsciiArmourDemand;
+            }
+
             if (signOnly) {
                 Apg.signText(this, in, out, getSecretKeyId(),
                              Apg.getCachedPassPhrase(getSecretKeyId()),
                              mPreferences.getDefaultHashAlgorithm(), this);
             } else {
-                Apg.encrypt(this, in, out, size, useAsciiArmour,
+                Apg.encrypt(this, in, out, useAsciiArmour,
                             encryptionKeyIds, signatureKeyId,
                             Apg.getCachedPassPhrase(signatureKeyId), this,
                             mPreferences.getDefaultEncryptionAlgorithm(),
@@ -639,8 +614,13 @@ public class EncryptActivity extends BaseActivity {
 
             out.close();
             if (mEncryptTarget != Id.target.file) {
-                data.putString(Apg.EXTRA_ENCRYPTED_MESSAGE,
+                if (useAsciiArmour) {
-                               new String(((ByteArrayOutputStream)out).toByteArray()));
+                    data.putString(Apg.EXTRA_ENCRYPTED_MESSAGE,
+                                   new String(((ByteArrayOutputStream)out).toByteArray()));
+                } else {
+                    data.putByteArray(Apg.EXTRA_ENCRYPTED_DATA,
+                                      ((ByteArrayOutputStream)out).toByteArray());
+                }
             }
         } catch (IOException e) {
             error = "" + e;
@@ -889,4 +869,31 @@ public class EncryptActivity extends BaseActivity {
 
         return super.onCreateDialog(id);
     }
+
+    protected void fillDataSource() {
+        mDataSource = new DataSource();
+        if (mContentUri != null) {
+            mDataSource.setUri(mContentUri);
+        } else if (mEncryptTarget == Id.target.file) {
+            mDataSource.setUri(mInputFilename);
+        } else {
+            if (mData != null) {
+                mDataSource.setData(mData);
+            } else {
+                mDataSource.setText(mMessage.getText().toString());
+            }
+        }
+    }
+
+    protected void fillDataDestination() {
+        mDataDestination = new DataDestination();
+        if (mContentUri != null) {
+            mDataDestination.setMode(Id.mode.stream);
+        } else if (mEncryptTarget == Id.target.file) {
+            mDataDestination.setFilename(mOutputFilename);
+            mDataDestination.setMode(Id.mode.file);
+        } else {
+            mDataDestination.setMode(Id.mode.byte_array);
+        }
+    }
 }

src/org/thialfihar/android/apg/GeneralActivity.java

@@ -14,11 +14,11 @@ import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.ListView;
 import android.widget.Toast;
-import android.widget.AdapterView.OnItemClickListener;
 
 public class GeneralActivity extends BaseActivity {
     private Intent mIntent;

src/org/thialfihar/android/apg/Id.java

@@ -135,6 +135,13 @@ public final class Id {
         public static final int message = 0x21070004;
     }
 
+    public static final class mode {
+        public static final int undefined = 0x21070001;
+        public static final int byte_array = 0x21070002;
+        public static final int file = 0x21070003;
+        public static final int stream = 0x21070004;
+    }
+
     public static final class key {
         public static final int none = 0;
         public static final int symmetric = -1;

src/org/thialfihar/android/apg/InputData.java

@@ -0,0 +1,25 @@
+package org.thialfihar.android.apg;
+
+import java.io.InputStream;
+
+public class InputData {
+    private PositionAwareInputStream mInputStream;
+    private long mSize;
+
+    InputData(InputStream inputStream, long size) {
+        mInputStream = new PositionAwareInputStream(inputStream);
+        mSize = size;
+    }
+
+    public InputStream getInputStream() {
+        return mInputStream;
+    }
+
+    public long getSize() {
+        return mSize;
+    }
+
+    public long getStreamPosition() {
+        return mInputStream.position();
+    }
+}

src/org/thialfihar/android/apg/KeyListActivity.java

@@ -48,15 +48,15 @@ import android.os.Message;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.ViewGroup;
 import android.view.View.OnClickListener;
+import android.view.ViewGroup;
 import android.widget.BaseExpandableListAdapter;
 import android.widget.Button;
 import android.widget.ExpandableListView;
+import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
 import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
-import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
 
 public class KeyListActivity extends BaseActivity {
     protected ExpandableListView mList;
@@ -328,7 +328,7 @@ public class KeyListActivity extends BaseActivity {
             }
 
             if (mTask == Id.task.import_keys) {
-                data = Apg.importKeyRings(this, mKeyType, importInputStream, size, this);
+                data = Apg.importKeyRings(this, mKeyType, new InputData(importInputStream, size), this);
             } else {
                 Vector<Integer> keyRingIds = new Vector<Integer>();
                 if (mSelectedItem == -1) {

src/org/thialfihar/android/apg/MailListActivity.java

@@ -30,11 +30,11 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
 import android.widget.BaseAdapter;
 import android.widget.ImageView;
 import android.widget.ListAdapter;
 import android.widget.TextView;
-import android.widget.AdapterView.OnItemClickListener;
 
 public class MailListActivity extends ListActivity {
     LayoutInflater mInflater = null;

src/org/thialfihar/android/apg/MainActivity.java

@@ -29,21 +29,21 @@ import android.database.SQLException;
 import android.net.Uri;
 import android.os.Bundle;
 import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.ViewGroup;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.view.View.OnClickListener;
+import android.view.ViewGroup;
 import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
 import android.widget.Button;
 import android.widget.CursorAdapter;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.TextView;
 import android.widget.Toast;
-import android.widget.AdapterView.OnItemClickListener;
 
 public class MainActivity extends BaseActivity {
     private ListView mAccounts = null;

src/org/thialfihar/android/apg/PreferencesActivity.java

@@ -18,7 +18,6 @@ package org.thialfihar.android.apg;
 
 import org.bouncycastle2.bcpg.HashAlgorithmTags;
 import org.bouncycastle2.openpgp.PGPEncryptedData;
-import org.thialfihar.android.apg.utils.Choice;
 
 import android.os.Bundle;
 import android.preference.CheckBoxPreference;

src/org/thialfihar/android/apg/PublicKeyListActivity.java

@@ -18,9 +18,9 @@ package org.thialfihar.android.apg;
 
 import android.os.Bundle;
 import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
 import android.view.Menu;
 import android.view.View;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.widget.ExpandableListView;
 
 public class PublicKeyListActivity extends KeyListActivity {

src/org/thialfihar/android/apg/SecretKeyListActivity.java

@@ -20,10 +20,10 @@ import android.app.Dialog;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.widget.ExpandableListView;
 import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
 import android.widget.ExpandableListView.OnChildClickListener;

src/org/thialfihar/android/apg/SelectSecretKeyListActivity.java

@@ -23,10 +23,10 @@ import android.view.Menu;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
 import android.widget.Button;
 import android.widget.ListView;
 import android.widget.TextView;
-import android.widget.AdapterView.OnItemClickListener;
 
 public class SelectSecretKeyListActivity extends BaseActivity {
     protected ListView mList;