add checks

Signed-off-by: alperozturk <alper_ozturk@proton.me>
nextcloud · Dec 4, 2024 · 54ca238 · 54ca238
1 parent 0ef9e0e
commit 54ca238
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/app/src/main/java/com/owncloud/android/utils/EncryptionUtilsV2.kt b/app/src/main/java/com/owncloud/android/utils/EncryptionUtilsV2.kt
@@ -953,6 +953,10 @@ class EncryptionUtilsV2 {
         oldCounter: Long,
         signature: String
     ) {
+        if (signature.isEmpty()) {
+            return
+        }
+
         if (decryptedFolderMetadataFile.metadata.counter < oldCounter) {
             MainApp.showMessage(R.string.e2e_counter_too_old)
             return
@@ -962,7 +966,7 @@ class EncryptionUtilsV2 {
         val certs = decryptedFolderMetadataFile.users.map { EncryptionUtils.convertCertFromString(it.certificate) }
         val signedData = getSignedData(signature, message)
 
-        if (!verifySignedData(signedData, certs)) {
+        if (certs.isNotEmpty() && !verifySignedData(signedData, certs)) {
             MainApp.showMessage(R.string.e2e_signature_does_not_match)
             return
         }
@@ -974,7 +978,7 @@ class EncryptionUtilsV2 {
         }
     }
 
-    fun getSignedData(base64encodedSignature: String, message: String): CMSSignedData {
+    private fun getSignedData(base64encodedSignature: String, message: String): CMSSignedData {
         val signature = EncryptionUtils.decodeStringToBase64Bytes(base64encodedSignature)
         val asn1Signature = ASN1Sequence.fromByteArray(signature)
         val contentInfo = ContentInfo.getInstance(asn1Signature)