RSA/ECB/ with 1填充解密

Question

下面的标记是SAML响应的一部分。我必须解密跟随CipherValue。我将CipherValue (字符串)传递给以下函数，但它没有返回正确的值，我做错了什么？

文件上说：

1. 从证书中获取私钥。使用RSA/ECB/PKCS1Padding.

解密加密密钥的

(键为以下值)

private string RSADecryption(string dataToDecrypt) 
{

  String certificateLocation = ConfigurationManager.AppSettings.Get("CertificateLocation");
  String certificateStore = ConfigurationManager.AppSettings.Get("CertificateStore");
  string certificateSubject = ConfigurationManager.AppSettings.Get("CertificateSubject");
  String decryptedKey = string.Empty;
  try
  {
      X509Certificate2 encryptionCertificate = X509Utilities.GetCertificateBySubject(certificateSubject, certificateStore.ParseAsEnum<StoreName>(),
      certificateLocation.ParseAsEnum<StoreLocation>());
      if (encryptionCertificate == null )
          Helper.LogMessage(" Did not find Encryption Certificate on the sserver " );
      RSACryptoServiceProvider rsaProvider = (RSACryptoServiceProvider)encryptionCertificate.PrivateKey;
      byte[] cipherbytes = Convert.FromBase64String(dataToDecrypt);
      byte[] plainbytes = rsaProvider.Decrypt(cipherbytes, false);
      System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
      decryptedKey =  enc.GetString(plainbytes);
  }

  catch (Exception e)
  {
      Helper.LogMessage(e.Message + " Key Parsing error. DataToDecrypt = " + dataToDecrypt);
      throw e;
  }
  return decryptedKey;

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Answer 1

如果不能够复制这个值，或者没有生成加密值的代码，就很难确定。我最好的猜测，也就是我见过太多次，是一个文本编码问题。这更有可能是因为：

( a)密码(如不良填充)也不例外；

( b)目前ASCII的使用不多，因此如下所示：

System.Text.ASCIIEncoding enc =新的System.Text.ASCIIEncoding()；

可能不会如愿以偿。

所以我想试试UFT8，Unicode.以及所有的变体(除非你在某个地方有这个文档)。