谁能给我一个使用BouncyCastle将.pem公共DSA密钥导入c＃的示例吗？

Question

I am trying co import a .pem key into c#, and I've found a library, which does that: BouncyCastle

I've created a code, which loads public key and is supposed to load the data into DSACryptoServiceProvider:

        DSA dsa;

        using (StreamReader rdr = new StreamReader(@"pubkey.pem"))
        {
            PemReader pr = new PemReader(rdr);
            DsaPublicKeyParameters o = pr.ReadObject() as DsaPublicKeyParameters;
            CspParameters prm = new CspParameters(13);
            prm.Flags = System.Security.Cryptography.CspProviderFlags.UseMachineKeyStore; 
            //o.Parameters.
            dsa = new DSACryptoServiceProvider(prm);
            DSAParameters dp = new DSAParameters();
            dp.G = o.Parameters.G.ToByteArray();
            dp.P = o.Parameters.P.ToByteArray();
            dp.Q = o.Parameters.Q.ToByteArray();                
            dp.Y = o.Y.ToByteArray();

            if (o.Parameters.ValidationParameters != null)
            {
                dp.Counter = o.Parameters.ValidationParameters.Counter;
                dp.Seed = o.Parameters.ValidationParameters.GetSeed();
            }

            //todo: missing: J, X?
            dsa.ImportParameters(dp);
        }

it crashes on dsa.ImportParameters(dp); with following exception: Cryptographic exception:bad data.

What should I change for this to work?

Answer 1

您需要使用ToByteArrayUnsigned方法，而不是普通的ToByteArray一个否则存在以下情况的字节数组表达结束了一个领先的零字节打破一切:)