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Prevent encrypted files from being corrupted when overwriting them #39623

merged 3 commits into from
Dec 28, 2021


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@JammingBen JammingBen commented Dec 28, 2021


This fixes an issue where overwriting an encrypted file by a share recipient would corrupt it.

This is a regression which was introduced by #39516. An early return was implement in the getHeader() method which caused trouble with a) part files and b) the fix-encrypted-version-command. Therefore I reverted the change as it seemed to be an optimization only.

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Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Database schema changes (next release will require increase of minor version instead of patch)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Technical debt
  • Tests only (no source changes)


  • Code changes
  • Unit tests added
  • Acceptance tests added
  • Documentation ticket raised:
  • Changelog item, see TEMPLATE

@owncloud owncloud deleted a comment from update-docs bot Dec 28, 2021
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sonarcloud bot commented Dec 28, 2021

Kudos, SonarCloud Quality Gate passed!    Quality Gate passed

Bug A 0 Bugs
Vulnerability A 0 Vulnerabilities
Security Hotspot A 0 Security Hotspots
Code Smell A 0 Code Smells

100.0% 100.0% Coverage
0.0% 0.0% Duplication

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Not sure about the target branch here. This has to land in 10.9.1, ideally without all other changes in master that have been made in the meantime. But I think master is fine, we can cherry pick the commits if needed to a release-10.9.1 branch.

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@JammingBen JammingBen merged commit 94463d4 into master Dec 28, 2021
@delete-merged-branch delete-merged-branch bot deleted the fix-encryption-10.9 branch December 28, 2021 12:42
JammingBen added a commit that referenced this pull request Dec 28, 2021
JammingBen added a commit that referenced this pull request Dec 28, 2021
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encryption PHP unit tests fail
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