CODEWITHSUNDEEP
c#encryptionrsa
felicia
felicia

Reputation: 13

Check existing RSA Key Container

I have created an RSA Key Container by using the following code.The keys are created in the container and I can encrypt/decrypt in the container successfully.

public static void CreateKeyContainer()
    {
        RSACryptoServiceProvider rsa = null;

        try
        {
            var cryptoParameters = new CspParameters();
            cryptoParameters.KeyContainerName = "MyContainer";
            cryptoParameters.Flags = CspProviderFlags.UseMachineKeyStore;
            rsa = new RSACryptoServiceProvider(2048, cryptoParameters);
        }
        finally
        {
            if (rsa != null)
            {
                rsa.Clear();
                rsa.Dispose();
            }
        }
    }

Before the call of the CreateKeyContainer method, I would like to ensure whether the keys already exist or not in the specified container. I have changed the flag to CpsProviderFlags.UseExistingKey.

public static bool CheckIfKeysExist()
    {
        RSACryptoServiceProvider rsa = null;

        try
        {
            var cryptoParameters = new CspParameters();
            cryptoParameters.KeyContainerName = "MyContainer";
            cryptoParameters.Flags = CspProviderFlags.UseExistingKey;
            rsa = new RSACryptoServiceProvider(2048, cryptoParameters);
        }
        catch (Exception ex)
        {
            return false;
        }
        finally
        {
            if (rsa != null)
            {
                rsa.Clear();
                rsa.Dispose();
            }
        }
        return true;
    }

However, by executing this method, it always throws a Cryptographic Exception that "Keyset does not exist", regardless of the existence of the key container.

How can I check if the key container already exists?

Upvotes: 0

Views: 1639

Answers (1)

Aashish Upadhyay
Aashish Upadhyay

Reputation: 870

Since you are creating the Key in Machine Key Store set the Flags property as shown below:

cryptoParameters.Flags = CspProviderFlags.UseExistingKey | | CspProviderFlags.UseMachineKeyStore;

Upvotes: 0

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