mime: respect charset header (default to utf-8)

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/InputDataOperation.java

@@ -172,7 +172,13 @@ public class InputDataOperation extends BaseOperation<InputDataParcel> {
 
                 log.add(LogType.MSG_DATA_MIME_LENGTH, 3, totalLength);
 
-                OpenPgpMetadata metadata = new OpenPgpMetadata(mFilename, bd.getMimeType(), 0L, totalLength);
+                String charset = bd.getCharset();
+                // the charset defaults to us-ascii, but we want to default to utf-8
+                if ("us-ascii".equals(charset)) {
+                    charset = "utf-8";
+                }
+
+                OpenPgpMetadata metadata = new OpenPgpMetadata(mFilename, bd.getMimeType(), 0L, totalLength, charset);
 
                 out.close();
                 outputUris.add(uri);

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/results/DecryptVerifyResult.java

@@ -34,9 +34,6 @@ public class DecryptVerifyResult extends InputPendingResult {
     OpenPgpSignatureResult mSignatureResult;
     OpenPgpDecryptionResult mDecryptionResult;
     OpenPgpMetadata mDecryptionMetadata;
-    // This holds the charset which was specified in the ascii armor, if specified
-    // https://tools.ietf.org/html/rfc4880#page56
-    String mCharset;
 
     CryptoInputParcel mCachedCryptoInputParcel;
 
@@ -96,14 +93,6 @@ public class DecryptVerifyResult extends InputPendingResult {
         mDecryptionMetadata = decryptMetadata;
     }
 
-    public String getCharset () {
-        return mCharset;
-    }
-
-    public void setCharset(String charset) {
-        mCharset = charset;
-    }
-
     public void setOutputBytes(byte[] outputBytes) {
         mOutputBytes = outputBytes;
     }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerifyOperation.java

@@ -556,12 +556,12 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp
                     originalFilename,
                     mimeType,
                     literalData.getModificationTime().getTime(),
-                    originalSize == null ? 0 : originalSize);
+                    originalSize == null ? 0 : originalSize,
+                    charset);
 
             log.add(LogType.MSG_DC_OK_META_ONLY, indent);
             DecryptVerifyResult result =
                     new DecryptVerifyResult(DecryptVerifyResult.RESULT_OK, log);
-            result.setCharset(charset);
             result.setDecryptionMetadata(metadata);
             return result;
         }
@@ -607,7 +607,7 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp
         }
 
         metadata = new OpenPgpMetadata(
-                originalFilename, mimeType, literalData.getModificationTime().getTime(), alreadyWritten);
+                originalFilename, mimeType, literalData.getModificationTime().getTime(), alreadyWritten, charset);
 
         if (signature != null) {
             updateProgress(R.string.progress_verifying_signature, 90, 100);
@@ -663,7 +663,6 @@ public class PgpDecryptVerifyOperation extends BaseOperation<PgpDecryptVerifyInp
 
         result.setCachedCryptoInputParcel(cryptoInput);
         result.setSignatureResult(signatureResultBuilder.build());
-        result.setCharset(charset);
         result.setDecryptionResult(decryptionResultBuilder.build());
         result.setDecryptionMetadata(metadata);
 

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/remote/OpenPgpService.java

@@ -628,15 +628,14 @@ public class OpenPgpService extends RemoteService {
                     }
                 }
 
-
+                OpenPgpMetadata metadata = pgpResult.getDecryptionMetadata();
                 if (data.getIntExtra(OpenPgpApi.EXTRA_API_VERSION, -1) >= 4) {
-                    OpenPgpMetadata metadata = pgpResult.getDecryptionMetadata();
                     if (metadata != null) {
                         result.putExtra(OpenPgpApi.RESULT_METADATA, metadata);
                     }
                 }
 
-                String charset = pgpResult.getCharset();
+                String charset = metadata != null ? metadata.getCharset() : null;
                 if (charset != null) {
                     result.putExtra(OpenPgpApi.RESULT_CHARSET, charset);
                 }

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

@@ -472,7 +472,8 @@ public class DecryptListFragment
             Intent intent = new Intent(activity, DisplayTextActivity.class);
             intent.setAction(Intent.ACTION_VIEW);
             intent.setDataAndType(outputUri, "text/plain");
-            intent.putExtra(DisplayTextActivity.EXTRA_METADATA, result.mDecryptVerifyResult);
+            intent.putExtra(DisplayTextActivity.EXTRA_RESULT, result.mDecryptVerifyResult);
+            intent.putExtra(DisplayTextActivity.EXTRA_METADATA, metadata);
             activity.startActivity(intent);
 
         } else {

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

@@ -25,9 +25,9 @@ import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
-import android.view.View;
 import android.widget.Toast;
 
+import org.openintents.openpgp.OpenPgpMetadata;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.operations.results.DecryptVerifyResult;
 import org.sufficientlysecure.keychain.ui.base.BaseActivity;
@@ -35,6 +35,7 @@ import org.sufficientlysecure.keychain.util.FileHelper;
 
 public class DisplayTextActivity extends BaseActivity {
 
+    public static final String EXTRA_RESULT = "result";
     public static final String EXTRA_METADATA = "metadata";
 
     @Override
@@ -60,11 +61,12 @@ public class DisplayTextActivity extends BaseActivity {
             return;
         }
 
-        DecryptVerifyResult result = intent.getParcelableExtra(EXTRA_METADATA);
+        DecryptVerifyResult result = intent.getParcelableExtra(EXTRA_RESULT);
+        OpenPgpMetadata metadata = intent.getParcelableExtra(EXTRA_METADATA);
 
         String plaintext;
         try {
-            plaintext = FileHelper.readTextFromUri(this, intent.getData(), result.getCharset());
+            plaintext = FileHelper.readTextFromUri(this, intent.getData(), metadata.getCharset());
         } catch (IOException e) {
             Toast.makeText(this, R.string.error_preparing_data, Toast.LENGTH_LONG).show();
             return;

OpenKeychain/src/test/java/org/sufficientlysecure/keychain/pgp/PgpEncryptDecryptTest.java

@@ -792,9 +792,9 @@ public class PgpEncryptDecryptTest {
             Assert.assertArrayEquals("decrypted ciphertext should equal plaintext bytes",
                     out.toByteArray(), plaindata);
             Assert.assertEquals("charset should be read correctly",
-                    "iso-2022-jp", result.getCharset());
+                    "iso-2022-jp", result.getDecryptionMetadata().getCharset());
             Assert.assertEquals("decrypted ciphertext should equal plaintext",
-                    new String(out.toByteArray(), result.getCharset()), plaintext);
+                    new String(out.toByteArray(), result.getDecryptionMetadata().getCharset()), plaintext);
             Assert.assertEquals("decryptionResult should be RESULT_ENCRYPTED",
                     OpenPgpDecryptionResult.RESULT_ENCRYPTED, result.getDecryptionResult().getResult());
             Assert.assertEquals("signatureResult should be RESULT_NO_SIGNATURE",