From b10b14d9bc737edc56af0eec3a14bed5ebf3ea39 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Dominik=20Sch=C3=BCrmann?= Date: Fri, 25 Sep 2015 01:02:21 +0200 Subject: Check that the encrypt input uris are not linked to our own internal storage (OKC-01-010) --- .../keychain/ui/EncryptFilesFragment.java | 29 +++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java') diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java index 58476fc57..0e357cfcd 100644 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java +++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptFilesFragment.java @@ -18,6 +18,7 @@ package org.sufficientlysecure.keychain.ui; +import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Date; @@ -451,9 +452,29 @@ public class EncryptFilesFragment } - // prepares mOutputUris, either directly and returns false, or indirectly - // which returns true and will call cryptoOperation after mOutputUris has - // been set at a later point. + /** + * Checks that the input uris are not linked to our own internal storage. + * This prevents the encryption of our own database (-> export of whole database) + */ + private void securityCheckInternalStorage() { + for (FilesAdapter.ViewModel model : mFilesAdapter.mDataset) { + File fileInput = new File(model.inputUri.getPath()); + try { + // the canonical path of the file must not start with /data/data/org.sufficientlysecure.keychain/ + if (fileInput.getCanonicalPath().startsWith(getActivity().getApplicationInfo().dataDir)) { + throw new RuntimeException("Encrypting OpenKeychain's private files is not allowed!"); + } + } catch (IOException e) { + Log.e(Constants.TAG, "Getting canonical path failed!", e); + } + } + } + + /** + * Prepares mOutputUris, either directly and returns false, or indirectly + * which returns true and will call cryptoOperation after mOutputUris has + * been set at a later point. + */ private boolean prepareOutputStreams() { switch (mAfterEncryptAction) { @@ -529,6 +550,8 @@ public class EncryptFilesFragment } + securityCheckInternalStorage(); + return actionsParcel; } -- cgit v1.2.3