Secure enclave implementation

SecretAgentKit/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>Copyright © 2020 Max Goedjen. All rights reserved.</string>
+</dict>
+</plist>

SecretAgentKit/OpenSSHReader.swift

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+import Foundation
+
+public class OpenSSHReader {
+
+    var remaining: Data
+
+    public init(data: Data) {
+        remaining = Data(data)
+    }
+
+    public func readNextChunk() throws -> Data {
+        let lengthRange = 0..<(UInt32.bitWidth/8)
+        let lengthChunk = remaining[lengthRange]
+        remaining.removeSubrange(lengthRange)
+        let littleEndianLength = lengthChunk.withUnsafeBytes { pointer in
+            return pointer.load(as: UInt32.self)
+        }
+        let length = Int(littleEndianLength.bigEndian)
+        let dataRange = 0..<length
+        let ret = Data(remaining[dataRange])
+        remaining.removeSubrange(dataRange)
+        return ret
+    }
+
+}

SecretAgentKit/SSHAgentProtocol.swift

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+import Foundation
+
+public enum SSHAgent {}
+
+extension SSHAgent {
+
+    public enum RequestType: UInt8, CustomDebugStringConvertible {
+        case requestIdentities = 11
+        case signRequest = 13
+
+        public var debugDescription: String {
+            switch self {
+            case .requestIdentities:
+                return "RequestIdentities"
+            default:
+                return "SignRequest"
+            }
+        }
+    }
+
+    public enum ResponseType: UInt8, CustomDebugStringConvertible {
+        case agentFailure = 5
+        case agentIdentitiesAnswer = 12
+        case agentSignResponse = 14
+
+        public var debugDescription: String {
+            switch self {
+            case .agentFailure:
+                return "AgentFailure"
+            case .agentIdentitiesAnswer:
+                return "AgentIdentitiesAnswer"
+            case .agentSignResponse:
+                return "AgentSignResponse"
+            }
+        }
+    }
+    
+}

SecretAgentKit/SecretAgentKit.h

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+//
+//  SecretAgentKit.h
+//  SecretAgentKit
+//
+//  Created by Max Goedjen on 2/22/20.
+//  Copyright © 2020 Max Goedjen. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+//! Project version number for SecretAgentKit.
+FOUNDATION_EXPORT double SecretAgentKitVersionNumber;
+
+//! Project version string for SecretAgentKit.
+FOUNDATION_EXPORT const unsigned char SecretAgentKitVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <SecretAgentKit/PublicHeader.h>
+
+