我正在使用 Xcode 7.1 版 (7B91b)，我正在使用 Swift 并构建一个 OSX 应用程序 (10.11.2)。我正在尝试生成并存储用于数据加密/解密的 RSA key 对。这是从以下位置获取的实现:'AsymmetricCrypto Github
// Constants
private let kAsymmetricCryptoManagerApplicationTag = "com.AsymmetricCrypto.keypair"
private let kAsymmetricCryptoManagerKeyType = kSecAttrKeyTypeRSA
private let kAsymmetricCryptoManagerKeySize = 2048
private let kAsymmetricCryptoManagerCypheredBufferSize = 1024
private let kAsymmetricCryptoManagerSecPadding: SecPadding = .PKCS1
func createSecureKeyPair(completion: ((success: Bool, error: AsymmetricCryptoException?) -> Void)? = nil) {
// private key parameters
let privateKeyParams: [String: AnyObject] = [
kSecAttrIsPermanent as String: false,
kSecAttrApplicationTag as String: kAsymmetricCryptoManagerApplicationTag
]
// private key parameters
let publicKeyParams: [String: AnyObject] = [
kSecAttrIsPermanent as String: false,
kSecAttrApplicationTag as String: kAsymmetricCryptoManagerApplicationTag
]
// global parameters for our key generation
let parameters: [String: AnyObject] = [
kSecAttrKeyType as String: kAsymmetricCryptoManagerKeyType,
kSecAttrKeySizeInBits as String: kAsymmetricCryptoManagerKeySize,
kSecPublicKeyAttrs as String: publicKeyParams,
kSecPrivateKeyAttrs as String: privateKeyParams,
]
// asynchronously generate the key pair and call the completion block
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) { () -> Void in
var pubKey, privKey: SecKeyRef?
let status = SecKeyGeneratePair(parameters, &pubKey, &privKey)
if status == errSecSuccess {
dispatch_async(dispatch_get_main_queue(), { completion?(success: true, error: nil) })
} else {
var error = AsymmetricCryptoException.UnknownError
switch (status) {
case errSecDuplicateItem: error = .DuplicateFoundWhileTryingToCreateKey
case errSecItemNotFound: error = .KeyNotFound
case errSecAuthFailed: error = .AuthFailed
default: break
}
dispatch_async(dispatch_get_main_queue(), { completion?(success: false, error: error) })
}
}
}
调用createSecureKeyPair()后，如下:
AsymmetricCryptoManager.sharedInstance.createSecureKeyPair({
(success, error) -> Void in
if (success) {
print("keys created")
} else {
print("error: \(error)")
}
})
我收到这个错误:
2015-12-26 03:55:46.113 sectest[17165:20928431] -[Swift._NSContiguousString bytes]: unrecognized selector sent to instance 0x610000045880
当然，异常 AsymmetricCryptoException.UnknownError 被返回(意味着错误是未知性质的)，如果有帮助，SecKeyGeneratePair() 返回值 -2070
奇怪的是 key (公钥和私钥)实际上是在钥匙串(keychain)中创建的:
这个错误是什么以及如何从上面的代码中得到预期的行为？
最佳答案
我从 Apple Developer Forums 得到了问题的答案。问题在于:
private let kAsymmetricCryptoManagerApplicationTag = "com.AsymmetricCrypto.keypair"
参数字典的键 kSecAttrApplicationTag 的值需要是 CFDataRef，而不是字符串。下面一行，解决了这个问题。
private let kAsymmetricCryptoManagerApplicationTag = "com.sectest.keypair".dataUsingEncoding(NSUTF8StringEncoding)!
关于swift - [Swift._NSContiguousString 字节] : unrecognized selector sent to instance，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34467722/