X509certificate2的RSA加解密

Question

所以，接下来我需要的是：

1. 创建用于开发的证书，分别为客户端和服务器获取一个证书
2. 通过从客户端编码并在服务器上解码的API检索密码

现在，我按照这个链接创建了certifiactes。那里的女孩一步一步地给出了如何获得自己签名的证书、将其存放在商店等方面的指导。现在，我有问题的部分是：

public static string Encrypt(string stringForEncription, string PathToPrivateKey)
    {
        X509Certificate2 myCertificate;
        try
        {
            myCertificate = new X509Certificate2(PathToPrivateKey, "Test123");
        }
        catch (Exception e)
        {
            throw new CryptographicException("Unable to open key file.");
        }

        RSACryptoServiceProvider rsaObj;
        if (myCertificate.HasPrivateKey)
        {
            rsaObj = (RSACryptoServiceProvider)myCertificate.PrivateKey;
        }
        else
            throw new CryptographicException("Private key not contained within certificate.");

        if (rsaObj == null)
            return String.Empty;

        byte[] decryptedBytes;
        byte[] array = Encoding.UTF8.GetBytes(stringForEncription);
        try
        {
            decryptedBytes = rsaObj.Encrypt(array, false);
            //decryptedBytes = rsaObj.Encrypt(Convert.FromBase64String(Base64EncryptedData), false);
        }
        catch (Exception e)
        {
            throw new CryptographicException("Unable to encrypt data.");
        }

        //    Check to make sure we decrpyted the string 
        if (decryptedBytes.Length == 0)
            return String.Empty;
        else
            return System.Text.Encoding.UTF8.GetString(decryptedBytes);
    }

 public static string DecryptEncryptedData(string Base64EncryptedData, string PathToPrivateKey)
    {
        X509Certificate2 myCertificate;
        try
        {
            myCertificate = new X509Certificate2(PathToPrivateKey, "Test123");
        }
        catch (Exception e)
        {
            throw new CryptographicException("Unable to open key file.");
        }

        RSACryptoServiceProvider rsaObj;
        if (myCertificate.HasPrivateKey)
        {
            rsaObj = (RSACryptoServiceProvider)myCertificate.PrivateKey;
        }
        else
            throw new CryptographicException("Private key not contained within certificate.");

        if (rsaObj == null)
            return String.Empty;

        byte[] decryptedBytes;
        try
        {
            decryptedBytes = rsaObj.Decrypt(Convert.FromBase64String(Base64EncryptedData), false);
        }
        catch (Exception e)
        {
            throw new CryptographicException("Unable to decrypt data.");
        }

        //    Check to make sure we decrpyted the string 
        if (decryptedBytes.Length == 0)
            return String.Empty;
        else
            return System.Text.Encoding.UTF8.GetString(decryptedBytes);
    }

{"The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. "}

真的会有人帮我。

Answer 1

出现错误的原因是您试图convert.fromBase64String从实际上不是base-64字符串的值转换的字符串。

加密数据后，应该将字节数组转换为base-64字符串。为此使用Convert.Tobase64String。

return Convert.ToBase64String(decryptedBytes);

那么您的解密行将起作用：