IOSSecuritySuite – iOS Platform Security And Anti-Tampering Swift Library

if IOSSecuritySuite.amIJailbroken() {
	print("This device is jailbroken")
} else {
	print("This device is not jailbroken")
}

let jailbreakStatus = IOSSecuritySuite.amIJailbrokenWithFailMessage()
if jailbreakStatus.jailbroken {
	print("This device is jailbroken")
	print("Because: (jailbreakStatus.failMessage)")
} else {
	print("This device is not jailbroken")
}

let jailbreakStatus = IOSSecuritySuite.amIJailbrokenWithFailedChecks()
if jailbreakStatus.jailbroken {
   if (jailbreakStatus.failedChecks.contains { $0.check == .existenceOfSuspiciousFiles }) && (jailbreakStatus.failedChecks.contains { $0.check == .suspiciousFilesCanBeOpened }) {
         print("This is real jailbroken device")
   }
}

// If we want to deny symbol hook of Swift function, we have to pass mangled name of that function
denySymbolHook("$s10Foundation5NSLogyySS_s7CVarArg_pdtF")   // denying hooking for the NSLog function
NSLog("Hello Symbol Hook")

denySymbolHook("abort") 
abort()

// Function declaration
func someFunction(takes: Int) -> Bool {
	return false
} 

// Defining FunctionType : @convention(thin) indicates a “thin” function reference, which uses the Swift calling convention with no special “self” or “context” parameters.
typealias FunctionType = @convention(thin) (Int) -> (Bool)

// Getting pointer address of function we want to verify
func getSwiftFunctionAddr(_ function: @escaping FunctionType) -> UnsafeMutableRawPointer {
	return unsafeBitCast(function, to: UnsafeMutableRawPointer.self)
}

let funcAddr = getSwiftFunctionAddr(someFunction)
let amIMSHooked = IOSSecuritySuite.amIMSHooked(funcAddr)

// Function declaration
func denyDebugger(value: Int) {
}

// Defining FunctionType : @convention(thin) indicates a “thin” function reference, which uses the Swift calling convention with no special “self” or “context” parameters.
typealias FunctionType = @convention(thin) (Int)->()

// Getting original function address
let funcDenyDebugger: FunctionType = denyDebugger 
let funcAddr = unsafeBitCast(funcDenyDebugger, to: UnsafeMutableRawPointer.self)


if let originalDenyDebugger = denyMSHook(funcAddr) {
// Call the original function with 1337 as Int argument
     unsafeBitCast(originalDenyDebugger, to: FunctionType.self)(1337)
 } else {
     denyDebugger()
 }

// Determine if application has been tampered with 
if IOSSecuritySuite.amITampered([.bundleID("biz.securing.FrameworkClientApp"),
    .mobileProvision("2976c70b56e9ae1e2c8e8b231bf6b0cff12bbbd0a593f21846d9a004dd181be3"),
    .machO("IOSSecuritySuite", "6d8d460b9a4ee6c0f378e30f137cebaf2ce12bf31a2eef3729c36889158aa7fc")]).result {
    print("I have been Tampered.")
}
else {
    print("I have not been Tampered.")
}

// Manually verify SHA256 hash value of a loaded dylib
if let hashValue = IOSSecuritySuite.getMachOFileHashValue(.custom("IOSSecuritySuite")), hashValue == "6d8d460b9a4ee6c0f378e30f137cebaf2ce12bf31a2eef3729c36889158aa7fc" {
    print("I have not been Tampered.")
}
else {
    print("I have been Tampered.")
}

// Check SHA256 hash value of the main executable
// Tip: Your application may retrieve this value from the server
if let hashValue = IOSSecuritySuite.getMachOFileHashValue(.d   efault), hashValue == "your-application-executable-hash-value" {
    print("I have not been Tampered.")
}
else {
    print("I have been Tampered.")
}

func denyDebugger() {
    // Set breakpoint here
}

typealias FunctionType = @convention(thin) ()->()
let func_denyDebugger: FunctionType = denyDebugger   // `: FunctionType` is a must
let func_addr = unsafeBitCast(func_denyDebugger, to: UnsafeMutableRawPointer.self)
let hasBreakpoint = IOSSecuritySuite.hasBreakpointAt(func_addr, functionSize: nil)

if hasBreakpoint {
    print("Breakpoint found in the specified function")
} else {
    print("Breakpoint not found in the specified function")
}

// Set a breakpoint at the testWatchpoint function
func testWatchpoint() -> Bool{
		// lldb: watchpoint set expression ptr
    var ptr = malloc(9)
    // lldb: watchpoint set variable count
    var count = 3
    return IOSSecuritySuite.hasWatchpoint()
}