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Android can't open encrypted folder #16882

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Android can't open encrypted folder#16882
Assignees
alperozturk96
Labels
bugfeature: encryption (client-side)Client-side E2E/E2EE

Description

@kuggu
kuggu
opened on Apr 19, 2026

Cause of error

Exception in thread "Thread-22" java.lang.IllegalStateException: Metadata is corrupt!
    at com.owncloud.android.utils.EncryptionUtilsV2.decryptFolderMetadataFile(EncryptionUtilsV2.kt:254)
    at com.owncloud.android.utils.EncryptionUtilsV2.parseAnyMetadata(EncryptionUtilsV2.kt:619)
    at com.owncloud.android.utils.EncryptionUtils.downloadFolderMetadata(EncryptionUtils.java:421)
    at com.owncloud.android.operations.RefreshFolderOperation.getDecryptedFolderMetadata(RefreshFolderOperation.java:649)
    at com.owncloud.android.operations.RefreshFolderOperation.synchronizeData(RefreshFolderOperation.java:535)
    at com.owncloud.android.operations.RefreshFolderOperation.fetchAndSyncRemoteFolder(RefreshFolderOperation.java:464)
    at com.owncloud.android.operations.RefreshFolderOperation.run(RefreshFolderOperation.java:275)
    at com.owncloud.android.lib.common.operations.RemoteOperation.run(RemoteOperation.java:387)
    at java.lang.Thread.run(Thread.java:1564)

App information

  • ID: com.nextcloud.client
  • Version: 330000190
  • Build flavor: gplay

Device information

  • Brand: google
  • Device: tokay
  • Model: Pixel 9
  • Id: CP1A.260405.005
  • Product: tokay

Firmware

  • SDK: 36
  • Release: 16
  • Incremental: 15001963

⚠️ Before posting ⚠️

  • This is a bug, not a question or an enhancement.
  • I've searched for similar issues and didn't find a duplicate.
  • I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
  • I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

Add Nextcloud instance to Android app. Then try to open encrypted folder.

Expected behaviour

Opened encrypted folder.

Actual behaviour

Gives error.

Android version

Newest current Android.

Device brand and model

Google Pixel 9

Stock or custom OS?

Stock

Nextcloud android app version

Current

Nextcloud server version

Current

Using a reverse proxy?

I don't know

Android logs

No response

Server error logs



Additional information


No response
Activity
  1. kuggu
    added 
    bug
     
    0. Needs triage
     on Apr 19, 2026
  2. alperozturk96
    self-assigned this
    on Apr 20, 2026
  3. alperozturk96
    removed 
    0. Needs triage
     on Apr 20, 2026
  4. alperozturk96 commented on Apr 20, 2026 
    @alperozturk96
    alperozturk96
    on Apr 20, 2026
    Collaborator
    @kuggu Hello
    

    Was folder empty? And server version is v33?
  5. kuggu commented on Apr 20, 2026 
    @kuggu
    kuggu
    on Apr 20, 2026
    Author
    

    @kuggu Hello
    

    Was folder empty? And server version is v33?
    

    

    Hi @alperozturk96
    

    Yes, the folder is empty and the server version is v33. In the browser the folder works. When I make an encrypted folder in de Android app itself, then it works fine. But not the other way around.
  6. joshtrichards
    added 
    feature: encryption (client-side)Client-side E2E/E2EE
     on Apr 22, 2026
  7. Spitfireap commented on Apr 30, 2026 
    @Spitfireap
    Spitfireap
    on Apr 30, 2026
    Same issue here. Though in a recent update of the app it shifted from Metadata is corrupt to an OpenSSL error.
    
Running NC 33.0.2 for the server side.
    

    Cause of error
    

    Exception in thread "Thread-46" javax.crypto.BadPaddingException: error:04000085:RSA routines:OPENSSL_internal:OAEP_DECODING_ERROR
    at org.conscrypt.NativeCrypto.EVP_PKEY_decrypt(Native Method)
    at org.conscrypt.OpenSSLCipherRSA$OAEP.doCryptoOperation(OpenSSLCipherRSA.java:594)
    at org.conscrypt.OpenSSLCipherRSA.engineDoFinal(OpenSSLCipherRSA.java:312)
    at javax.crypto.Cipher.doFinal(Cipher.java:2074)
    at com.owncloud.android.utils.EncryptionUtils.decryptStringAsymmetricV2(EncryptionUtils.java:726)
    at com.owncloud.android.utils.EncryptionUtilsV2.decryptMetadataKey(EncryptionUtilsV2.kt:412)
    at com.owncloud.android.utils.EncryptionUtilsV2.decryptFolderMetadataFile(EncryptionUtilsV2.kt:214)
    at com.owncloud.android.utils.EncryptionUtilsV2.parseAnyMetadata(EncryptionUtilsV2.kt:619)
    at com.owncloud.android.utils.EncryptionUtils.downloadFolderMetadata(EncryptionUtils.java:421)
    at com.owncloud.android.operations.RefreshFolderOperation.getDecryptedFolderMetadata(RefreshFolderOperation.java:649)
    at com.owncloud.android.operations.RefreshFolderOperation.synchronizeData(RefreshFolderOperation.java:535)
    at com.owncloud.android.operations.RefreshFolderOperation.fetchAndSyncRemoteFolder(RefreshFolderOperation.java:464)
    at com.owncloud.android.operations.RefreshFolderOperation.run(RefreshFolderOperation.java:275)
    at com.owncloud.android.lib.common.operations.RemoteOperation.run(RemoteOperation.java:387)
    at java.lang.Thread.run(Thread.java:1564)
    

    App information
    

      

    • ID: com.nextcloud.client
      • 

    • Version: 330010090
      • 

    • Build flavor: generic
      • 

    

    Device information
    

      

    • Brand: samsung
      • 

    • Device: dm1q
      • 

    • Model: SM-S911B
      • 

    • Id: BP2A.250605.031.A3
      • 

    • Product: dm1qxeea
      • 

    

    Firmware
    

      

    • SDK: 36
      • 

    • Release: 16
      • 

    • Incremental: S911BXXS9EZCI
      • 

  8. maybeanerd commented on May 23, 2026 
    @maybeanerd
    maybeanerd
    on May 23, 2026
    Same error here. also folder I created on another client and then tried opening in Android
    
Opening in web works, folder is empty
    

    Server is v33.0.3, freshly set up last week using the kubernetes helmchart ( infrastructure definition although I don't think that would be related)
    

    Cause of error
    

    Exception in thread "Thread-316" java.lang.IllegalStateException: Metadata is corrupt!
    at com.owncloud.android.utils.EncryptionUtilsV2.decryptFolderMetadataFile(EncryptionUtilsV2.kt:254)
    at com.owncloud.android.utils.EncryptionUtilsV2.parseAnyMetadata(EncryptionUtilsV2.kt:619)
    at com.owncloud.android.utils.EncryptionUtils.downloadFolderMetadata(EncryptionUtils.java:421)
    at com.owncloud.android.operations.RefreshFolderOperation.getDecryptedFolderMetadata(RefreshFolderOperation.java:649)
    at com.owncloud.android.operations.RefreshFolderOperation.synchronizeData(RefreshFolderOperation.java:535)
    at com.owncloud.android.operations.RefreshFolderOperation.fetchAndSyncRemoteFolder(RefreshFolderOperation.java:464)
    at com.owncloud.android.operations.RefreshFolderOperation.run(RefreshFolderOperation.java:275)
    at com.owncloud.android.lib.common.operations.RemoteOperation.run(RemoteOperation.java:387)
    at java.lang.Thread.run(Thread.java:1564)
    

    App information
    

      

    • ID: com.nextcloud.client
      • 

    • Version: 330010090
      • 

    • Build flavor: gplay
      • 

    

    Device information
    

      

    • Brand: OnePlus
      • 

    • Device: OP5D55L1
      • 

    • Model: CPH2653
      • 

    • Id: BP2A.250605.015
      • 

    • Product: CPH2653EEA
      • 

    

    Firmware
    

      

    • SDK: 36
      • 

    • Release: 16
      • 

    • Incremental: V.R4T3.535a14b-3024561-302455e
      • 

  9. maybeanerd commented on May 25, 2026 
    @maybeanerd
    maybeanerd
    on May 25, 2026
    It seems that now it works for me. Didn't change anything myself, and I think the app is also the same version (33.1.1)
  10. alperozturk96 commented on May 26, 2026 
    @alperozturk96
    alperozturk96
    on May 26, 2026
    Collaborator
    Fixed via:
    

    #16916
    

    #16944
  11. alperozturk96
    closed this as completedon May 26, 2026
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