ios - SecRequestSharedWebCredential 凭据包含 'Passwords not saved' ？

Question

我们通过函数检索所有保存的密码:

SecRequestSharedWebCredential(NULL, NULL, ^(CFArrayRef credentials, CFErrorRef error) {
    if (!error && CFArrayGetCount(credentials)) {
        CFDictionaryRef credential = CFArrayGetValueAtIndex(credentials, 0);
        if (credential > 0) {
            CFDictionaryRef credential = CFArrayGetValueAtIndex(credentials, 0);
            NSString *username = CFDictionaryGetValue(credential, kSecAttrAccount);
            NSString *password = CFDictionaryGetValue(credential, kSecSharedPassword);
            dispatch_async(dispatch_get_main_queue(), ^{
                //Updates the UI here.
            });
        }
    }
});

问题是，在 IOS 9.3.3 iPhone 6 A1524 上，我们会收到一个名为“未保存密码”的条目的提示。没有错误消息提示未找到密码。因为数组 > 0，所以它用条目完成表单。

为什么会这样？我们认为如果您的授权域下没有存储密码，则不会出现提示。

有什么建议吗？

谢谢。

Answer 1

我在 viewDidLoad() 中为我的 Auth View Controller 检查这个。该代码与上面的代码略有不同，是从其他几个 SO 答案中收集的。

swift 3:

SecRequestSharedWebCredential(Configuration.webBaseFQDN as CFString, nil, { (credentials, error) in

    if let error = error {
        print("ERROR: credentials")
        print(error)
    }

    guard let credentials = credentials, CFArrayGetCount(credentials) > 0 else {
        // Did not find a shared web credential.
        return
    }

    guard CFArrayGetCount(credentials) == 1 else {
        // There should be exactly one credential.
        return
    }

    let unsafeCredential = CFArrayGetValueAtIndex(credentials, 0)
    let credential = unsafeBitCast(unsafeCredential, to: CFDictionary.self)

    let unsafeEmail = CFDictionaryGetValue(credential, Unmanaged.passUnretained(kSecAttrAccount).toOpaque())
    let email = unsafeBitCast(unsafeEmail, to: CFString.self) as String

    let unsafePassword = CFDictionaryGetValue(credential, Unmanaged.passUnretained(kSecSharedPassword).toOpaque())
    let password = unsafeBitCast(unsafePassword, to: CFString.self) as String

    if self.isValidEmail(email) && self.isValidPassword(password) {
        self.usedSharedWebCredentials = true
        self.doSignIn(email: email, password: password)
    }
})

isValidEmail(_:) 和 isValidPassword(_:) 最后的额外检查处理了 SecRequeestSharedWebCredential() 返回的情况第一个凭据(电子邮件)中的“密码未保存”。

希望有人能解释为什么会发生这种情况，但如果没有，至少有一种方法可以解决这种情况。

我还想补充一点，我在 iOS 10.2.1 之前就已经看到了这一点