use aesgcm:// uri scheme for omemo encrypted http upload

1 files changed, 13 insertions, 0 deletions

diff --git a/src/main/java/de/pixart/messenger/utils/CryptoHelper.java b/src/main/java/de/pixart/messenger/utils/CryptoHelper.java
index da9007a06..b5d3d6c61 100644
--- a/src/main/java/de/pixart/messenger/utils/CryptoHelper.java
+++ b/src/main/java/de/pixart/messenger/utils/CryptoHelper.java
@@ -8,6 +8,8 @@ import org.bouncycastle.asn1.x500.style.BCStyle;
 import org.bouncycastle.asn1.x500.style.IETFUtils;
 import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
 
+import java.net.MalformedURLException;
+import java.net.URL;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.security.cert.CertificateEncodingException;
@@ -230,4 +232,15 @@ public final class CryptoHelper {
                 return R.string.encryption_choice_pgp;
         }
     }
+
+    public static URL toAesGcmUrl(URL url) {
+        if (!url.getProtocol().equalsIgnoreCase("https")) {
+            return url;
+        }
+        try {
+            return new URL("aesgcm" + url.toString().substring(url.getProtocol().length()));
+        } catch (MalformedURLException e) {
+            return url;
+        }
+    }
 }