Feature: Hub 1.3.0 Compatibility

Adds support for the updated Device Registration and Unlock which has been introduced with Cryptomator Hub 1.3.0. For more details about the updated flow see https://github.com/cryptomator/cryptomator/pull/3041 and https://github.com/cryptomator/cryptomator/issues/3181. Unlike the Cryptomator Desktop App we removed the support for Cryptomator Hub instances with a minimum API level of 0, i.e. Cryptomator Hub < 1.3.0. Therefore, we request the API config at (<API-BASE-URL>/config/ and check that apiLevel >= 1.

This can't be merged at the current state because we still need to update cloud-access-swift to use the latest JOSESwift branch which adds support for PBES2_HS512_A256KW (needed to decrypt the user key). Additionally we need to update the HubConfig to the following:

public struct HubConfig: Equatable, Codable {
    public let clientId: String
    public let authEndpoint: String
    public let tokenEndpoint: String
    public let authSuccessUrl: String
    public let authErrorUrl: String
    public let apiBaseUrl: String?
    public let devicesResourceUrl: String

    public init(clientId: String, authEndpoint: String, tokenEndpoint: String, authSuccessUrl: String, authErrorUrl: String, apiBaseUrl: String?, devicesResourceUrl: String) {
        self.clientId = clientId
        self.authEndpoint = authEndpoint
        self.tokenEndpoint = tokenEndpoint
        self.authSuccessUrl = authSuccessUrl
        self.authErrorUrl = authErrorUrl
        self.apiBaseUrl = apiBaseUrl
        self.devicesResourceUrl = devicesResourceUrl
    }
}

Also the localization for the authentication errors is still missing.

I have added a new dependency https://github.com/leif-ibsen/SwiftECC. The only reason it has been added is to support PKCS#8 since CryptoKit does not support it out of the box. We can exchange this later with our own implementation in cryptolib-swift if we want.

Summary by CodeRabbit

New Features
- Updated to Swift tools version 5.9.
- Added new cryptographic functionality and support for SwiftECC.
- Improved hub authentication flow with new cases and error handling.
- Introduced account key parameter and UI for device registration.
- Enhanced vault unlocking process with updated cryptographic methods.
Enhancements
- Extended custom keyboard functionality in SwiftUI.
- Added new localizable strings for hub authentication messages.
Refactor
- Refactored authentication and cryptographic code for clarity and maintainability.
Tests
- Added comprehensive tests for new authentication and cryptographic features.
Documentation
- Updated documentation to reflect new features and changes.

Walkthrough

The project has undergone a significant update, enhancing the authentication flow with the Cryptomator Hub. It now supports a new cryptographic library, SwiftECC, and includes UI updates for account key entry. The authentication process has been refined with additional error handling and a minimum hub version requirement. The JWEHelper has been expanded with new encryption and decryption methods, and the tests have been updated to cover the new functionality.

Changes

File Path	Change Summary
`CryptomatorCommon/Package.swift`	Updated Swift tools to 5.9, added "SwiftECC" dependency, included "SwiftUIIntrospect" and "SwiftECC" in products.
`CryptomatorCommon/Sources/CryptomatorCommonCore/Hub/*.swift`	Refactored authentication enums, added new methods and constants, updated protocols and UI elements for account key handling. Introduces a new method in `HubAuthenticationCoordinator` extension.
`CryptomatorCommon/Sources/CryptomatorCommonCore/JWEHelper.swift`	Renamed and added methods for key decryption and encryption, added private key extension.
`CryptomatorCommon/Sources/CryptomatorCommonCore/SwiftUI/SwiftUI+CustomKeyboard.swift`	Added extensions for custom keyboard functionality.
`CryptomatorCommon/Tests/CryptomatorCommonCoreTests/Hub/HubAuthenticationViewModelTests.swift`, `CryptomatorCommon/Tests/CryptomatorCommonCoreTests/Hub/JWEHelperTests.swift`	Updated tests for new authentication flow and JWEHelper methods.
`SharedResources/en.lproj/Localizable.strings`	Added new keys for hub authentication messages.
`.github/workflows/build.yml`	Added a step to select Xcode 15.1 using `sudo xcode-select` command.
`Cryptomator.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved`	Additions and updates to remote source control dependencies.

🐇✨ A hop of code, a leap of Swift,
Encryption's gift, now set adrift.
Keys entwine in a silent ballet,
Cryptomator's dance, secure they'll stay. 🌟🔐

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cryptomator / ios