feat: Certificate pinning and proxy mode in WireAPI - WPB-10450

[samwyndham]

WPB-10450 [iOS] Support certificate pinning

Issue

This PR adds a certificate pinning implementation to the WireAPI module. It is part of quick sync refactor. It doesn't attempt to use this new implementation in the app.

The code is essentially duplicated from WireTransport with some modifications. Main things to look at are:

• ServerTrustValidator basically combines the existing ServerCertificateTrust.swift with security key generation code from TrustData.swift. See my comments for specific changes.
• PinnedKey.swift will replace TrustData.swift. It is just a basic struct without code for reading the data from file, and generating security keys.

Testing

Run the automated tests.

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Checklist

• Title contains a reference JIRA issue number like [WPB-XXX].
• Description is filled and free of optional paragraphs.
• Adds/updates automated tests.

[github-actions]

Test Results

   16 files     17 suites   13m 59s ⏱️
8 617 tests 8 564 ✅ 31 💤 22 ❌
8 638 runs  8 606 ✅ 31 💤  1 ❌

For more details on these failures, see this check.

Results for commit 07d84e0.

♻️ This comment has been updated with latest results.

[jullianm]

looks good

[johnxnguyen]

Looks good, nice work

[datadog-wireapp]

Datadog Report

Branch report: feat/wire-api-cert-pinning-WPB-10450
Commit report: 288408b
Test service: wire-ios-mono

❌ 1 Failed (0 Known Flaky), 8316 Passed, 31 Skipped, 5m 51.05s Total Time
❄️ 1 New Flaky

❌ Failed Tests (1)

• testThatItDoesSendConversationEventsInATeamConversationWhereYouAreGuest() - WireMockTransportTests - Details

  Expand for error

   XCTAssertEqual failed: ("0") is not equal to ("1") (/Users/admin/actions-runner/_work/wire-ios/wire-ios/wire-ios-mocktransport/Tests/Source/Push%20Events/MockTransportSessionTeamEventsTests.swift#EndingLineNumber=282&StartingLineNumber=282)
  

New Flaky Tests (1)

• testThatItCallsExpirationHandlerOnCreatedActivities() - WireTransport-ios-tests - Last Failure

  Expand for error

   Asynchronous wait failed: Exceeded timeout of 0.5 seconds, with unfulfilled expectations: "The expiration handler is called.". (/Users/admin/actions-runner/_work/wire-ios/wire-ios/wire-ios-transport/Tests/Source/Background/BackgroundActivityFactoryTests.swift#EndingLineNumber=119&StartingLineNumber=119)
  

[samwyndham]

🤦 I accidentally merged https://github.com/wireapp/wire-ios/pull/2260 into this instead of waiting for this PR to merge to develop.