无法访问保存在 Xamarin.iOS 钥匙串值中 [英] Can't access saved in a Xamarin.iOS keychain value

问题描述

在我的应用程序中，我有两种方法可以帮助我从钥匙串中保存和获取值

In my app I have two methods which help me save and get values from keychain

public static void StoreKeysInKeychain(string key, string value)
    {
        DeleteKeyFromKeychain(key);
        var s = new SecRecord(SecKind.GenericPassword)
        {
            ValueData = NSData.FromString(value),
            Generic = NSData.FromString(key)
        };
        SecKeyChain.Add(s);
        Console.WriteLine(GetRecordsFromKeychain(key));
    }

    public static string GetRecordsFromKeychain(string key)
    {
        SecStatusCode res;
        var rec = new SecRecord(SecKind.GenericPassword)
        {
            Generic = NSData.FromString(key)
        };
        var match = SecKeyChain.QueryAsRecord(rec, out res);

        if (match != null)
            return match.ValueData.ToString();

        return "Error";
    }

我在那里保存了两个值，出于某种原因，当我尝试获取其中任何一个时，我得到一个错误"字符串而不是值.相同的代码以前工作没有任何问题，但后来我添加了另一个参数来存储在钥匙串中并重命名两个

I'm saving there two values and for some reason when I try to get any of them I get an "Error" string instead of the value. The same code previously worked without any problems, but then I added another parameter to store in the keychain and renamed both

推荐答案

如果您的目标是 iOS 10+，请确保您正在检查 SecKeyChain.Add 的返回状态:

If you are targeting iOS 10+, make sure you are checking the return status of your SecKeyChain.Add:

var status = SecKeyChain.Add(s);
if (status == SecStatusCode.Success)
    Console.WriteLine(GetRecordsFromKeychain(key));
else
    Console.WriteLine(status);

如果你得到一个 -34018，那么你需要在你的 Entitlements.plist 中启用 KeyChain 访问:

If you are getting a -34018, then you need to enable KeyChain access in your Entitlements.plist:

然后确保将 Entitlements.plist 分配给您的项目 Build/iOS Bundle Signing 中的 Custom Entitlements:

And then make sure that the Entitlements.plist is assigned to your Custom Entitlements in your Project Build / iOS Bundle Signing:

这篇关于无法访问保存在 Xamarin.iOS 钥匙串值中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！