ASP.Net：「無效的加密消息類型」錯誤加密消息時

Question

public byte[] DoEncrypt(string message, X509Certificate2 cryptCert) 
    { 
     byte[] signedBytes = new System.Text.UTF8Encoding().GetBytes(message); 
     EnvelopedCms encryptedMessage = new EnvelopedCms(new ContentInfo(signedBytes)); 

     CmsRecipientCollection recipients = new CmsRecipientCollection(); 

      CmsRecipient recipient = new CmsRecipient(cryptCert); 
      recipients.Add(recipient); 


     encryptedMessage.Encrypt(recipient); 

     return encryptedMessage.Encode(); 
    } 

當我的應用程序試圖對它進行加密拋出異常「encryptedMessage.RecipientInfos」扔類型的異常的消息「System.Security.Cryptography.CryptographicException '與文本「無效的加密消息類型」出現在行「encryptedMessage.Encrypt（收件人）」

Answer 1

如果您實際上正在加密簽名數據（如變量名稱所示），則不應使用默認內容類型您的ContentInfo。相反，您應該使用允許您指定signedData內容類型的alternative constructor。