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| 1 | + |
| 2 | +// --- stubs --- |
| 3 | + |
| 4 | +class Data { |
| 5 | + init<S>(_ elements: S) {} |
| 6 | +} |
| 7 | + |
| 8 | +class NSObject |
| 9 | +{ |
| 10 | +} |
| 11 | + |
| 12 | +struct _RNCryptorSettings { |
| 13 | + // ... |
| 14 | +} |
| 15 | +typealias RNCryptorSettings = _RNCryptorSettings |
| 16 | + |
| 17 | +let kRNCryptorAES256Settings = RNCryptorSettings() |
| 18 | + |
| 19 | +struct _RNCryptorKeyDerivationSettings { |
| 20 | + // ... |
| 21 | +} |
| 22 | +typealias RNCryptorKeyDerivationSettings = _RNCryptorKeyDerivationSettings |
| 23 | + |
| 24 | +typealias RNCryptorHandler = () -> Void // simplified |
| 25 | + |
| 26 | +class RNCryptor : NSObject |
| 27 | +{ |
| 28 | + func key(forPassword password: String?, salt: Data?, settings keySettings: RNCryptorKeyDerivationSettings) -> Data? { return nil } |
| 29 | + func keyForPassword(_ password: String?, salt: Data?, settings keySettings: RNCryptorKeyDerivationSettings) -> Data? { return nil } |
| 30 | +} |
| 31 | + |
| 32 | +class RNEncryptor : RNCryptor |
| 33 | +{ |
| 34 | + override init() {} |
| 35 | + |
| 36 | + init(settings: RNCryptorSettings, password: String?, handler: RNCryptorHandler?) {} |
| 37 | + init(settings: RNCryptorSettings, password: String, iv anIV: Data?, encryptionSalt anEncryptionSalt: Data?, hmacSalt anHMACSalt: Data?, handler: RNCryptorHandler?) {} |
| 38 | + init(settings: RNCryptorSettings, password: String, IV anIV: Data?, encryptionSalt anEncryptionSalt: Data?, HMACSalt anHMACSalt: Data?, handler: RNCryptorHandler?) {} |
| 39 | + |
| 40 | + func encryptData(_ data: Data?, with settings: RNCryptorSettings, password: String?) throws -> Data { return Data(0) } |
| 41 | + func encryptData(_ data: Data?, withSettings settings: RNCryptorSettings, password: String?) throws -> Data { return Data(0) } |
| 42 | + func encryptData(_ data: Data?, with settings: RNCryptorSettings, password: String?, iv anIV: Data?, encryptionSalt anEncryptionSalt: Data?, hmacSalt anHMACSalt: Data?) throws -> Data { return Data(0) } |
| 43 | + func encryptData(_ data: Data?, withSettings settings: RNCryptorSettings, password: String?, IV anIV: Data?, encryptionSalt anEncryptionSalt: Data?, HMACSalt anHMACSalt: Data?) throws -> Data { return Data(0) } |
| 44 | +} |
| 45 | + |
| 46 | +class RNDecryptor : RNCryptor |
| 47 | +{ |
| 48 | + override init() {} |
| 49 | + |
| 50 | + init(password: String?, handler: RNCryptorHandler?) {} |
| 51 | + |
| 52 | + func decryptData(_ data: Data?, withPassword password: String?) throws -> Data { return Data(0) } |
| 53 | + func decryptData(_ theCipherText: Data?, withSettings settings: RNCryptorSettings, password aPassword: String?) throws -> Data { return Data(0) } |
| 54 | +} |
| 55 | + |
| 56 | +// --- tests --- |
| 57 | + |
| 58 | +func getARandomPassword() -> String { |
| 59 | + let charset = "abcdefghijklmnopqrstuvwxyz1234567890" |
| 60 | + return String("............".map{_ in charset.randomElement()!}) |
| 61 | +} |
| 62 | + |
| 63 | +func test(cond: Bool) { |
| 64 | + let myEncryptor = RNEncryptor() |
| 65 | + let myDecryptor = RNDecryptor() |
| 66 | + let myData = Data(0) |
| 67 | + |
| 68 | + let myRandomPassword = getARandomPassword() |
| 69 | + let myConstPassword = "abc123" |
| 70 | + let myMaybePassword = cond ? myRandomPassword : myConstPassword |
| 71 | + |
| 72 | + // reasonable usage |
| 73 | + |
| 74 | + let a = try? myEncryptor.encryptData(myData, with: kRNCryptorAES256Settings, password: myRandomPassword) // GOOD |
| 75 | + let _ = try? myDecryptor.decryptData(a, withPassword: myRandomPassword) // GOOD |
| 76 | + |
| 77 | + let b = try? myEncryptor.encryptData(myData, with: kRNCryptorAES256Settings, password: myConstPassword) // BAD |
| 78 | + let _ = try? myDecryptor.decryptData(b, withPassword: myConstPassword) // BAD |
| 79 | + |
| 80 | + let c = try? myEncryptor.encryptData(myData, with: kRNCryptorAES256Settings, password: myMaybePassword) // BAD |
| 81 | + let _ = try? myDecryptor.decryptData(c, withPassword: myMaybePassword) // BAD |
| 82 | + |
| 83 | + // all methods |
| 84 | + |
| 85 | + let myKeyDerivationSettings = RNCryptorKeyDerivationSettings() |
| 86 | + let myHandler = {} |
| 87 | + let myIV = Data(0) |
| 88 | + let mySalt = Data(0) |
| 89 | + let mySalt2 = Data(0) |
| 90 | + |
| 91 | + let _ = myEncryptor.key(forPassword: myConstPassword, salt: mySalt, settings: myKeyDerivationSettings) // BAD |
| 92 | + let _ = myEncryptor.keyForPassword(myConstPassword, salt: mySalt, settings: myKeyDerivationSettings) // BAD |
| 93 | + let _ = myDecryptor.key(forPassword: myConstPassword, salt: mySalt, settings: myKeyDerivationSettings) // BAD |
| 94 | + let _ = myDecryptor.keyForPassword(myConstPassword, salt: mySalt, settings: myKeyDerivationSettings) // BAD |
| 95 | + |
| 96 | + let _ = RNEncryptor(settings: kRNCryptorAES256Settings, password: myConstPassword, handler: myHandler) // BAD |
| 97 | + let _ = RNEncryptor(settings: kRNCryptorAES256Settings, password: myConstPassword, iv: myIV, encryptionSalt: mySalt, hmacSalt: mySalt2, handler: myHandler) // BAD |
| 98 | + let _ = RNEncryptor(settings: kRNCryptorAES256Settings, password: myConstPassword, IV: myIV, encryptionSalt: mySalt, HMACSalt: mySalt2, handler: myHandler) // BAD |
| 99 | + |
| 100 | + let _ = try? myEncryptor.encryptData(myData, with: kRNCryptorAES256Settings, password: myConstPassword) // BAD |
| 101 | + let _ = try? myEncryptor.encryptData(myData, withSettings: kRNCryptorAES256Settings, password: myConstPassword) // BAD |
| 102 | + let _ = try? myEncryptor.encryptData(myData, with: kRNCryptorAES256Settings, password: myConstPassword, iv: myIV, encryptionSalt: mySalt, hmacSalt: mySalt2) // BAD |
| 103 | + let _ = try? myEncryptor.encryptData(myData, withSettings: kRNCryptorAES256Settings, password: myConstPassword, IV: myIV, encryptionSalt: mySalt, HMACSalt: mySalt2) // BAD |
| 104 | + |
| 105 | + let _ = RNDecryptor(password: myConstPassword, handler: myHandler) // BAD |
| 106 | + |
| 107 | + let _ = try? myDecryptor.decryptData(myData, withPassword: myConstPassword) // BAD |
| 108 | + let _ = try? myDecryptor.decryptData(myData, withSettings: kRNCryptorAES256Settings, password: myConstPassword) // BAD |
| 109 | +} |
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