C# 使用非对称密钥的UWP编码/解码

我试图找到一种方法，用私钥加密字符串，用公钥解密。我使用OpenSSL生成密钥，如中所述：

这就是我目前拥有的

public static string Encrypt(string str, string key)
{
    try
    {
        key = key.Replace(Environment.NewLine, "");
        IBuffer keyBuffer = CryptographicBuffer.DecodeFromBase64String(key);

        AsymmetricKeyAlgorithmProvider provider = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithmNames.RsaPkcs1);

        CryptographicKey publicKey = provider.ImportPublicKey(keyBuffer, CryptographicPublicKeyBlobType.Pkcs1RsaPublicKey);
        IBuffer dataBuffer = CryptographicBuffer.CreateFromByteArray(Encoding.UTF8.GetBytes(str));
        var encryptedData = CryptographicEngine.Encrypt(publicKey, dataBuffer, null);

        return CryptographicBuffer.EncodeToBase64String(encryptedData);
    }
    catch (Exception e)
    {
        throw;
        return "Error in Encryption:With RSA ";
    }
}

然而，在ImportPublicKey方法中，我得到了一个异常

ASN1损坏数据

传递给该方法的字符串

键

具有以下格式：

var privateKey =

@“MIICXWIBAAKBGQDUTQFSNFIQX3AEPORHJYCWK007CFU4FXLUTIYF6U9IPDHYPD .... yDxwZVmexltyK5Bwc26lmb+5EtTEic+kZToYWcCucF8lsok=“

因此，OpenSSL生成的密钥文件的内容不包含此部分：

-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----

---

好的，所以我的代码是非常错误的，因为我想用私钥加密，但是使用了

ImportPublicKey

函数，正确的方法应该是

public static string Encrypt(string str, string key)
{
    try
    {
        key = key.Replace(Environment.NewLine, "");
        IBuffer keyBuffer = CryptographicBuffer.DecodeFromBase64String(key);

        AsymmetricKeyAlgorithmProvider provider = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithmNames.RsaPkcs1);

        var keyPar = provider.ImportKeyPair(keyBuffer, CryptographicPrivateKeyBlobType.Pkcs1RsaPrivateKey);
        //CryptographicKey publicKey = provider.ImportPublicKey(keyBuffer, CryptographicPublicKeyBlobType.Pkcs1RsaPublicKey);
        IBuffer dataBuffer = CryptographicBuffer.CreateFromByteArray(Encoding.UTF8.GetBytes(str));
        var encryptedData = CryptographicEngine.Encrypt(keyPar, dataBuffer, null);
        var encryptedStr = CryptographicBuffer.EncodeToBase64String(encryptedData);
        var signature = CryptographicEngine.Sign(keyPar, dataBuffer);
        var signatureStr = CryptographicBuffer.EncodeToBase64String(signature);
        return encryptedStr;
    }
    catch (Exception e)
    {
        throw;
        return "Error in Encryption:With RSA ";
    }
}

这可以使用RSA私钥对字符串进行加密

但是，当我尝试使用公钥解密时，使用以下类似的方法

public static string Decrypt(string str, string key)
{
    try
    {
        key = key.Replace(Environment.NewLine, "");
        IBuffer keyBuffer = CryptographicBuffer.DecodeFromBase64String(key);

        AsymmetricKeyAlgorithmProvider provider = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithmNames.RsaSignPkcs1Sha256);

        CryptographicKey publicKey = provider.ImportPublicKey(keyBuffer, CryptographicPublicKeyBlobType.X509SubjectPublicKeyInfo);
        IBuffer dataBuffer = CryptographicBuffer.CreateFromByteArray(Encoding.UTF8.GetBytes(str));
        var encryptedData = CryptographicEngine.Decrypt(publicKey, dataBuffer, null);
        return CryptographicBuffer.EncodeToBase64String(encryptedData);
    }
    catch (Exception e)
    {
        throw;
        return "Error in Decryption:With RSA ";
    }
}

我得到了一个未实现的

方法或操作

异常，要么仍然有问题，要么UWP中还没有私有加密/公共解密方法

我最后做的是让nuget软件包

可移植。BouncyCastle签名

，并按照下面的答案中的代码片段进行操作：

---

像沙姆一样工作。

请使用官方便携式版本的BouncyCastle，portable.BouncyCastle。我是便携式叉子的维护者。如果遇到问题，请在repo中打开问题：github.com/onovotny/bc-csharp