Fix decrypt/verify from gmail/aosp mail with sharing intent, fix scrolling in decryt screen

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextActivity.java

@@ -32,9 +32,7 @@ import org.sufficientlysecure.keychain.service.results.SingletonResult;
 import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.ui.util.Notify;
 
-import java.io.StreamTokenizer;
 import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 public class DecryptTextActivity extends ActionBarActivity {
 
@@ -58,38 +56,51 @@ public class DecryptTextActivity extends ActionBarActivity {
     }
 
     /**
-     * Fix the message a bit, trailing spaces and newlines break stuff,
-     * because GMail sends as HTML and such things break ASCII Armor
-     * TODO: things like "<" and ">" also make problems
-     * <p/>
-     * NOTE: Do not use on cleartext signatures, only on ASCII-armored ciphertext,
-     * it would change the signed message
+     * Fixing broken PGP MESSAGE Strings coming from GMail/AOSP Mail
      */
-    private String fixAsciiArmoredCiphertext(String message) {
+    private String fixPgpMessage(String message) {
+        // windows newline -> unix newline
+        message = message.replaceAll("\r\n", "\n");
+        // Mac OS before X newline -> unix newline
+        message = message.replaceAll("\r", "\n");
+
+        // remove whitespaces before newline
         message = message.replaceAll(" +\n", "\n");
+        // only two consecutive newlines are allowed
         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");
+
         // replace non breakable spaces
         message = message.replaceAll("\\xa0", " ");
 
         return message;
     }
 
+    /**
+     * Fixing broken PGP SIGNED MESSAGE Strings coming from GMail/AOSP Mail
+     */
+    private String fixPgpCleartextSignature(String message) {
+        // windows newline -> unix newline
+        message = message.replaceAll("\r\n", "\n");
+        // Mac OS before X newline -> unix newline
+        message = message.replaceAll("\r", "\n");
+
+        return message;
+    }
+
     private String getPgpContent(String input) {
         // only decrypt if clipboard content is available and a pgp message or cleartext signature
         if (input != null) {
             Matcher matcher = PgpHelper.PGP_MESSAGE.matcher(input);
             if (matcher.matches()) {
                 String message = matcher.group(1);
-                message = fixAsciiArmoredCiphertext(message);
+                message = fixPgpMessage(message);
                 return message;
             } else {
                 matcher = PgpHelper.PGP_CLEARTEXT_SIGNATURE.matcher(input);
                 if (matcher.matches()) {
-                    // return cleartext signature
-                    return matcher.group(1);
+                    String message = matcher.group(1);
+                    message = fixPgpCleartextSignature(message);
+                    return message;
                 } else {
                     return null;
                 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptTextFragment.java

@@ -23,6 +23,7 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.os.Message;
 import android.os.Messenger;
+import android.text.method.ScrollingMovementMethod;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -181,7 +182,6 @@ public class DecryptTextFragment extends DecryptFragment {
                         byte[] decryptedMessage = returnData
                                 .getByteArray(KeychainIntentService.RESULT_DECRYPTED_BYTES);
                         mText.setText(new String(decryptedMessage));
-                        mText.setHorizontallyScrolling(false);
 
                         pgpResult.createNotify(getActivity()).show();
 

OpenKeychain/src/main/res/layout/decrypt_text_fragment.xml

@@ -1,51 +1,45 @@
 <?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:fillViewport="true">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
     android:orientation="vertical">
 
     <include layout="@layout/decrypt_result_include" />
 
-        <View
-            android:id="@+id/status_divider"
-            android:layout_height="1dip"
+    <ScrollView
+        android:fillViewport="true"
+        android:paddingTop="8dp"
         android:layout_width="match_parent"
-            android:background="?android:attr/listDivider" />
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:paddingTop="4dp"
-            android:paddingLeft="16dp"
-            android:paddingRight="16dp"
-            android:orientation="vertical">
+        android:scrollbars="vertical"
+        android:layout_height="0dp"
+        android:layout_weight="1">
 
         <TextView
             android:id="@+id/decrypt_text_plaintext"
+            android:paddingLeft="16dp"
+            android:paddingRight="16dp"
             android:textAppearance="?android:attr/textAppearanceMedium"
             android:layout_width="match_parent"
-                android:layout_height="0dip"
+            android:layout_height="wrap_content"
             android:gravity="top"
             android:hint=""
-                android:scrollHorizontally="true"
-                android:layout_weight="1"
             android:textIsSelectable="true" />
 
+    </ScrollView>
+
     <View
         android:layout_width="match_parent"
         android:layout_height="1dip"
+        android:layout_marginLeft="16dp"
+        android:layout_marginRight="16dp"
         android:background="?android:attr/listDivider" />
 
-
     <LinearLayout
         android:id="@+id/action_decrypt_share_plaintext"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:layout_marginLeft="16dp"
+        android:layout_marginRight="16dp"
         android:clickable="true"
         style="@style/SelectableItem"
         android:orientation="horizontal">
@@ -81,9 +75,4 @@
             style="@style/SelectableItem" />
 
     </LinearLayout>
-
 </LinearLayout>
-
-    </LinearLayout>
-
-</ScrollView>