ssl: implement import of .bks files

AndroidManifest.xml

@@ -68,6 +68,17 @@
 		<category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
 	</activity>
+	<activity android:name=".KeyfileImportActivity" android:label="@string/ssl_import_activity">
+	    <intent-filter>
+		<action android:name="android.intent.action.VIEW" />
+		<category android:name="android.intent.category.DEFAULT" />
+		<category android:name="android.intent.category.BROWSABLE" />
+		<data android:scheme="file" />
+		<data android:mimeType="*/*" />
+		<data android:pathPattern=".*\\.bks" />
+		<data android:host="*" />
+	    </intent-filter>
+	</activity>
 	<service android:name=".AprsService" android:label="@string/aprsservice">
 	    <intent-filter>
 		<action android:name="org.aprsdroid.app.SERVICE" />

res/values/strings.xml

@@ -350,4 +350,10 @@
 <!-- TCP/IP TNC settings -->
 <string name="p_tcptnc_server_summary">KISS TCP server to contact</string>
 <string name="p_tcptnc_entry">Enter the KISS server hostname</string>
+
+<!-- SSL strings -->
+<string name="ssl_import_activity">Import keyfile into APRSdroid</string>
+<string name="ssl_no_keyfile">No keyfile for %s! Using plaintext.</string>
+<string name="ssl_import_ok">Imported keyfile for %s.</string>
+<string name="ssl_import_error">Error importing keyfile: %s!</string>
 </resources>

src/KeyfileImportActivity.scala

@@ -0,0 +1,61 @@
+package org.aprsdroid.app
+
+import _root_.android.app.Activity
+import _root_.android.content.Context
+import _root_.android.os.Bundle
+import _root_.android.preference.PreferenceManager
+import _root_.android.util.Log
+import _root_.android.widget.Toast
+
+import _root_.java.io.File
+import _root_.java.io.FileOutputStream
+import _root_.java.security.KeyStore
+import _root_.java.security.cert.X509Certificate
+
+import scala.collection.JavaConversions._ // for enumeration of keystore aliases
+
+class KeyfileImportActivity extends Activity {
+	val TAG = "APRSdroid.KeyImport"
+	val KEYSTORE_PASS = "APRS-IS".toCharArray()
+	val KEYSTORE_DIR = "keystore"
+
+	val CALL_RE = ".*CALLSIGN=([0-9A-Za-z]+).*".r
+
+	override def onCreate(savedInstanceState: Bundle) {
+		super.onCreate(savedInstanceState)
+		Log.d(TAG, "created: " + getIntent())
+		try {
+			val ks = KeyStore.getInstance("BKS")
+			ks.load(getContentResolver().openInputStream(getIntent.getData()), KEYSTORE_PASS)
+			var callsign : String = null
+			for (alias <- ks.aliases()) {
+				if (ks.isKeyEntry(alias)) {
+					val c = ks.getCertificate(alias).asInstanceOf[X509Certificate]
+					// work around missing X500Principal.getName(String, Map<String, String) on SDK<9:
+					val dn = c.getSubjectX500Principal().toString()
+						.replace("OID.1.3.6.1.4.1.12348.1.1=", "CALLSIGN=")
+					Log.d(TAG, "Loaded key: " + dn)
+					dn match {
+					case CALL_RE(call) => callsign = call
+					case _ =>
+					}
+				}
+			}
+			if (callsign != null) {
+				val dir = getApplicationContext().getDir(KEYSTORE_DIR, Context.MODE_PRIVATE)
+				val keyStoreFile = new File(dir + File.separator + callsign + ".bks")
+				ks.store(new FileOutputStream(keyStoreFile), KEYSTORE_PASS)
+
+				PreferenceManager.getDefaultSharedPreferences(this)
+					.edit().putString("callsign", callsign).commit()
+
+				Toast.makeText(this, getString(R.string.ssl_import_ok, callsign), Toast.LENGTH_SHORT).show()
+			}
+		} catch {
+		case e : Exception =>
+			Toast.makeText(this, getString(R.string.ssl_import_error, e.getMessage()), Toast.LENGTH_SHORT).show()
+			e.printStackTrace()
+		}
+		finish()
+	}
+}

src/backend/TcpUploader.scala

@@ -100,7 +100,7 @@ class TcpUploader(service : AprsService, prefs : PrefsWrapper) extends AprsBacke
 			} catch {
 				case e : java.io.FileNotFoundException =>
 					service.postAddPost(StorageDatabase.Post.TYPE_INFO, R.string.post_info,
-						"No keyfile for '%s'! Using plaintext.".format(prefs.getCallsign()))
+						service.getString(R.string.ssl_no_keyfile, prefs.getCallsign()))
 					return null
 				case e : Exception =>
 					e.printStackTrace()