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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| import CoreBluetooth | ||
| import Foundation | ||
| import SpruceIDMobileSdkRs | ||
|
|
||
| public enum DeviceEngagement { | ||
| case QRCode | ||
| } | ||
|
|
||
| /// To be implemented by the consumer to update the UI | ||
| public protocol BLESessionStateDelegate: AnyObject { | ||
| func update(state: BLESessionState) | ||
| } | ||
|
|
||
| public class IsoMdlPresentation { | ||
| var callback: BLESessionStateDelegate | ||
| var uuid: UUID | ||
| var session: MdlPresentationSession | ||
| var mdoc: MDoc | ||
| var bleManager: MDocHolderBLECentral! | ||
| var useL2CAP: Bool | ||
|
|
||
| init?( | ||
| mdoc: MDoc, engagement: DeviceEngagement, | ||
| callback: BLESessionStateDelegate, useL2CAP: Bool | ||
| ) async { | ||
| self.callback = callback | ||
| self.uuid = UUID() | ||
| self.mdoc = mdoc | ||
| self.useL2CAP = useL2CAP | ||
| do { | ||
| self.session = | ||
| try await SpruceIDMobileSdkRs.initializeMdlPresentationFromBytes( | ||
| mdoc: mdoc.inner, uuid: self.uuid.uuidString) | ||
| bleManager = MDocHolderBLECentral( | ||
| callback: self, | ||
| serviceUuid: CBUUID(nsuuid: self.uuid), | ||
| useL2CAP: useL2CAP) | ||
| self.callback.update( | ||
| state: .engagingQRCode( | ||
| session.getQrCodeUri().data(using: .ascii)!)) | ||
| } catch { | ||
| print("\(error)") | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| // Cancel the request mid-transaction and gracefully clean up the BLE stack. | ||
| public func cancel() { | ||
| bleManager.disconnectFromDevice(session: self.session) | ||
| } | ||
|
|
||
| public func submitNamespaces(items: [String: [String: [String]]]) { | ||
| do { | ||
| let payload = try session.generateResponse(permittedItems: items) | ||
| let query = | ||
| [ | ||
| kSecClass: kSecClassKey, | ||
| kSecAttrApplicationLabel: self.mdoc.keyAlias, | ||
| kSecReturnRef: true | ||
| ] as [String: Any] | ||
|
|
||
| // Find and cast the result as a SecKey instance. | ||
| var item: CFTypeRef? | ||
| var secKey: SecKey | ||
| switch SecItemCopyMatching(query as CFDictionary, &item) { | ||
| case errSecSuccess: | ||
| // swiftlint:disable force_cast | ||
| secKey = item as! SecKey | ||
| // swiftlint:enable force_cast | ||
| case errSecItemNotFound: | ||
| self.callback.update(state: .error(.generic("Key not found"))) | ||
| self.cancel() | ||
| return | ||
| case let status: | ||
| self.callback.update( | ||
| state: .error(.generic("Keychain read failed: \(status)"))) | ||
| self.cancel() | ||
| return | ||
| } | ||
| var error: Unmanaged<CFError>? | ||
| guard | ||
| let derSignature = SecKeyCreateSignature( | ||
| secKey, | ||
| .ecdsaSignatureMessageX962SHA256, | ||
| payload as CFData, | ||
| &error) as Data? | ||
| else { | ||
| self.callback.update( | ||
| state: .error( | ||
| .generic( | ||
| "Failed to sign message: \(error.debugDescription)") | ||
| )) | ||
| self.cancel() | ||
| return | ||
| } | ||
| let response = try session.submitResponse( | ||
| derSignature: derSignature) | ||
| self.bleManager.writeOutgoingValue(data: response) | ||
| } catch { | ||
| self.callback.update(state: .error(.generic("\(error)"))) | ||
| self.cancel() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| extension IsoMdlPresentation: MDocBLEDelegate { | ||
| func callback(message: MDocBLECallback) { | ||
| switch message { | ||
| case .done: | ||
| self.callback.update(state: .success) | ||
| case .connected: | ||
| self.callback.update(state: .connected) | ||
| case .uploadProgress(let value, let total): | ||
| self.callback.update(state: .uploadProgress(value, total)) | ||
| case .message(let data): | ||
| do { | ||
| let itemsRequests = try session.handleRequest(request: data) | ||
| self.callback.update(state: .selectNamespaces(itemsRequests)) | ||
| } catch { | ||
| self.callback.update(state: .error(.generic("\(error)"))) | ||
| self.cancel() | ||
| } | ||
| case .error(let error): | ||
| self.callback.update( | ||
| state: .error(BleSessionError(holderBleError: error))) | ||
| self.cancel() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public enum BleSessionError { | ||
| /// When discovery or communication with the peripheral fails | ||
| case peripheral(String) | ||
| /// When Bluetooth is unusable (e.g. unauthorized). | ||
| case bluetooth(CBCentralManager) | ||
| /// Generic unrecoverable error | ||
| case generic(String) | ||
|
|
||
| init(holderBleError: MdocHolderBleError) { | ||
| switch holderBleError { | ||
| case .peripheral(let string): | ||
| self = .peripheral(string) | ||
| case .bluetooth(let string): | ||
| self = .bluetooth(string) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public enum BLESessionState { | ||
| /// App should display the error message | ||
| case error(BleSessionError) | ||
| /// App should display the QR code | ||
| case engagingQRCode(Data) | ||
| /// App should indicate to the user that BLE connection has been made | ||
| case connected | ||
| /// App should display an interactive page for the user to chose which values to reveal | ||
| case selectNamespaces([ItemsRequest]) | ||
| /// App should display the fact that a certain percentage of data has been sent | ||
| /// - Parameters: | ||
| /// - 0: The number of chunks sent to far | ||
| /// - 1: The total number of chunks to be sent | ||
| case uploadProgress(Int, Int) | ||
| /// App should display a success message and offer to close the page | ||
| case success | ||
| } |
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