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Simplify user verification state #1740

Merged
merged 2 commits into from
Mar 20, 2023
Merged

Simplify user verification state #1740

merged 2 commits into from
Mar 20, 2023

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Anderas
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@Anderas Anderas commented Mar 16, 2023

Resolves https:/matrix-org/internal-config/issues/1325

The SDK has previously relied on MXUserTrustLevel to determine whether any particular user is verified or not. It did so by distinguishing between "local" and "cross-signed" trust, where a user is considered verified if either one of those fields is true. This is however unnecessarily complex model, not used upcoming rust-crypto, and does not really make sense, given that "user verification" should only be possible via cross-signing, not by setting manual values.

To improve this, remove MXUserTrustLevel entirely and replace it with a simple isVerified boolean. This makes the API everywhere much simpler to use. As a downside, we have to deal with some amount of migration from the previous model (we use NSCoding to persist these values). To ensure correct migration, we will now store "version" property in MXCrossSigningInfo, which is used to decode the values correctly

Additionally replace NSProgress with MXTrustSummary when computing trustSummary for more than one user or device. Using NSProgress has worked okay, but it makes for some strange and clunky API (e.g. .fractionCompleted >= 0 instead of allAreTrusted).

@Anderas Anderas force-pushed the andy/user_trust branch 2 times, most recently from aed6ee7 to 1635415 Compare March 16, 2023 12:59
@Anderas Anderas requested review from a team and Velin92 and removed request for a team March 16, 2023 13:14
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LGTM

@Anderas
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Anderas commented Mar 16, 2023

@Velin92 added one more commit 1dafa92

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codecov bot commented Mar 16, 2023

Codecov Report

Patch coverage: 72.02% and project coverage change: +0.02 🎉

Comparison is base (efdf2f4) 37.75% compared to head (1dafa92) 37.78%.

Additional details and impacted files
@@             Coverage Diff             @@
##           develop    #1740      +/-   ##
===========================================
+ Coverage    37.75%   37.78%   +0.02%     
===========================================
  Files          615      616       +1     
  Lines        96889    96899      +10     
  Branches     41856    41867      +11     
===========================================
+ Hits         36580    36610      +30     
+ Misses       59261    59242      -19     
+ Partials      1048     1047       -1     
Impacted Files Coverage Δ
MatrixSDK/Crypto/MXCryptoV2.swift 13.78% <0.00%> (+0.15%) ⬆️
MatrixSDK/Crypto/Recovery/MXRecoveryService.m 2.33% <0.00%> (ø)
...SDK/Crypto/Verification/MXKeyVerificationManager.m 53.67% <0.00%> (+0.03%) ⬆️
...fication/Transactions/QRCode/MXQRCodeTransaction.m 0.00% <0.00%> (ø)
...e/CoreData/Models/MXUsersTrustLevelSummaryMO.swift 0.00% <0.00%> (ø)
MatrixSDKTests/MXRoomSummaryTrustTests.m 0.00% <0.00%> (ø)
MatrixSDK/Crypto/Trust/MXUsersTrustLevelSummary.m 23.68% <16.66%> (+1.18%) ⬆️
MatrixSDK/Crypto/MXCrypto.m 66.87% <27.27%> (-0.10%) ⬇️
MatrixSDKTests/MXCrossSigningVerificationTests.m 27.70% <33.33%> (-0.07%) ⬇️
...rossSigning/Data/MXCrossSigningInfoUnitTests.swift 88.63% <80.00%> (-11.37%) ⬇️
... and 12 more

... and 5 files with indirect coverage changes

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@Anderas Anderas merged commit 4fb70e6 into develop Mar 20, 2023
@Anderas Anderas deleted the andy/user_trust branch March 20, 2023 12:52
Anderas added a commit that referenced this pull request Mar 22, 2023
This reverts commit 4fb70e6, reversing
changes made to efdf2f4.
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2 participants