问题描述
我建立了多个客户端之间的安全通信的应用程序。为了做到这一点，我加密与AES的消息，然后我加密AES密钥与收件人的RSA公钥，然后我送这两个组件（RSA加密AES密钥和AES加密的消息）给收件人。整个过程运作良好，并没有任何错误。
I'm building an application for secure messaging between multiple clients. In order to achieve that, I encrypt the message with AES, then I encrypt the AES key with the recipients public RSA key, then I send these two components (RSA-encrypted AES key and AES-encrypted message) to the recipient. The whole process works well and without any errors.
现在我遇到了一个问题，我不知道什么是最好的做法：为了持续1 participent的私钥和公钥，我需要存储的密钥对。地方保存为XML文件是可能的，但显然不是一个选项。所以决定用这里描述一个关键的容器。中实现用容器是很容易的，但我怎么能
Now I ran into a problem and I'm wondering what would be the best practice: In order to persist the private and public key of one participent, I need to store the key pair. Saving it somewhere as an XML file is possible, but obviously not an option. So decided to use a key container as described here. Implementing the use of the container is quite easy, but how can I
- 检查是否在指定的容器已经存在？
- 检查密钥大小的给定值匹配？
据我可以看到这是不可能的，因为的RSACryptoServiceProvider生成一个新的密钥，如果容器不存在 - 瞒着左右。但我需要知道，如果有一个previously存储密钥对现有或创建一个新的。
As far as I can see this is not possible, because the RSACryptoServiceProvider generates a new key if the container does not exist - without telling so. But I need to know if there is a previously stored key pair available or if a new one is created.
我该如何解决呢？或者，这是一个完全错误的做法？非常感谢您对这种帮助！
How can I fix that? Or is this a completely wrong approach?Thanks for your help on that!
问候，罗布
推荐答案
试试这个：
public static bool DoesKeyExists(string containerName)
{
var cspParams = new CspParameters
{
Flags = CspProviderFlags.UseExistingKey,
KeyContainerName = containerName
};
try
{
var provider = new RSACryptoServiceProvider(cspParams);
}
catch (Exception e)
{
return false;
}
return true;
}
similiar问题：How检查是否在.NET
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