前言：
前段時間因為公司業務需求，需要將微信小程式與企業微信對接通，也就是把小程式繫結到對應的企業微信賬號下，在該企業微信的使用者可以將該小程式繫結到工作臺中，然後可以在工作臺中開啟該小程式並授權。不過將微信小程式與企業微信對接通需要後臺去做資料回撥URL和指令回撥URL驗證，因為第一次接觸這個然後企業微信文件寫的也不是很詳細，並且在全網沒有找到一篇.NET相關企業微信回撥配置驗證有用的文章，所以這裡把自己的配置詳細過程分享出來，希望能夠幫助更多的同學。
企業微信回撥配置相關文件
回撥配置：
主要講的是回撥配置的一些驗證流程和請求介面。
C#解密類庫：
https://open.work.weixin.qq.com/wwopen/downloadfile/csharp.zip
企業微信回撥配置驗證完整流程
注意：配置回撥服務時，需要能同時支援HttpGet以及HttpPost兩種能力，注意介面一定要是https的安全域名地址。
- HttpGet介面用於驗證資料回撥URL有效性
- HttpPost介面用於驗證指令回撥URL有效性
所以我們可以只定義一個介面，通過企業微信請求過來的型別進行不同回撥URL的有效性驗證。
處理企業號的資訊介面：
public class EnterpriseWechatCallbackController : Controller
{ //企業微信後臺開發者設定的token, corpID, EncodingAESKey
private readonly string sToken = "追逐時光者";//企業微信後臺，開發者設定的Token
private readonly string sCorpID = "追逐時光者";//企業號corpid是企業號的專屬編號（CorpID）[不同場景含義不同，詳見文件說明（ToUserName：企業微信的CorpID，當為第三方應用回撥事件時，CorpID的內容為suiteid）]
private readonly string sEncodingAESKey = "追逐時光者";//企業微信後臺，開發者設定的EncodingAESKey /// <summary>
/// 處理企業號的資訊
/// get:資料回撥URL驗證;
/// post:指令回撥URL驗證;
/// </summary>
public ActionResult EtWechatCommunication()
{
string httpMethod = Request.HttpMethod.ToUpper(); if (httpMethod == "POST")
{
//獲取請求中的xml資料
string postString = GetXMLParameters(Request); string responseContent = "響應失敗，未獲取到xml中的請求引數";
if (!string.IsNullOrEmpty(postString))
{
//指令響應回撥
responseContent = CommandCallback(Request, postString);
} return Content(responseContent);
}
else
{
return EtWachatCheckVerifyURL();
}
} /// <summary>
/// 資料回撥URL驗證
/// </summary>
/// <returns></returns>
public ActionResult EtWachatCheckVerifyURL()
{
string signature = Request.QueryString["msg_signature"];//微信加密簽名，msg_signature結合了企業填寫的token、請求中的timestamp、nonce引數、加密的訊息體
string timestamp = Request.QueryString["timestamp"];//時間戳
string nonce = Request.QueryString["nonce"];//隨機數
string httpMethod = Request.HttpMethod.ToUpper(); if (httpMethod == "GET")//驗證回撥URL(注意：企業回撥的url-該url不做任何的業務邏輯，僅僅微信檢視是否可以調通)
{
try
{
//在1秒內響應GET請求，響應內容為上一步得到的明文訊息內容decryptEchoString（不能加引號，不能帶bom頭，不能帶換行符）
string echostr = Request.QueryString["echostr"];//加密的隨機字串，以msg_encrypt格式提供。需要解密並返回echostr明文，解密後有random、msg_len、msg、$CorpID四個欄位，其中msg即為echostr明文 if (!IsNullOrWhiteSpace(signature) && !IsNullOrWhiteSpace(timestamp) && !IsNullOrWhiteSpace(nonce) && !IsNullOrWhiteSpace(echostr))
{
string decryptEchoString = null;
if (CheckVerifyURL(sToken, signature, timestamp, nonce, sCorpID, sEncodingAESKey, echostr, ref decryptEchoString))
{
if (!string.IsNullOrEmpty(decryptEchoString))
{
//必須要返回解密之後的明文
return Content(decryptEchoString);
}
}
}
else
{
return Content("fail");
}
}
catch (Exception ex)
{
return Content("fail");
}
} return Content("fail");
} /// <summary>
/// 驗證URL有效性
/// </summary>
/// <param name="token">企業微信後臺，開發者設定的Token</param>
/// <param name="signature">簽名串，對應URL引數的msg_signature</param>
/// <param name="timestamp">時間戳</param>
/// <param name="nonce">隨機數</param>
/// <param name="corpId">ToUserName為企業號的CorpID</param>
/// <param name="encodingAESKey">企業微信後臺，開發者設定的EncodingAESKey</param>
/// <param name="echostr">隨機串，對應URL引數的echostr</param>
/// <param name="retEchostr">解密之後的echostr，當return返回0時有效</param>
/// <returns></returns>
private bool CheckVerifyURL(string token, string signature, string timestamp, string nonce, string corpId, string encodingAESKey, string echostr, ref string retEchostr)
{
WXBizMsgCrypt wxcpt = new WXBizMsgCrypt(token, encodingAESKey, corpId); int result = wxcpt.VerifyURL(signature, timestamp, nonce, echostr, ref retEchostr); if (result != 0)
{
return false;//FAIL
} //result==0表示驗證成功、retEchostr引數表示明文
//使用者需要將retEchostr作為get請求的返回引數、返回給企業微訊號
return true;
} /// <summary>
/// 指令響應回撥
/// </summary>
/// <param name="Request"></param>
/// <param name="postString">post請求的xml引數</param>
/// <returns></returns>
private string CommandCallback(HttpRequestBase Request, string postString)
{
string signature = Request.QueryString["msg_signature"];//微信加密簽名，msg_signature結合了企業填寫的token、請求中的timestamp、nonce引數、加密的訊息體
string timestamp = Request.QueryString["timestamp"];//時間戳
string nonce = Request.QueryString["nonce"];//隨機數
var xmlDoc = XDocument.Parse(postString);//xml資料轉化 try
{
//https://work.weixin.qq.com/api/doc/90001/90143/90613
//在發生授權、通訊錄變更、ticket變化等事件時，企業微信伺服器會嚮應用的“指令回撥URL”推送相應的事件訊息。
//訊息結構體將使用建立應用時的EncodingAESKey進行加密（特別注意, 在第三方回撥事件中使用加解密演算法，receiveid的內容為suiteid），請參考接收訊息解析資料包。 本章節的回撥事件，服務商在收到推送後都必須直接返回字串 “success”，若返回值不是 “success”，企業微信會把返回內容當作錯誤資訊。
if (xmlDoc.Root.Element("Encrypt") != null)
{
//將post請求的資料進行xml解析，並將<Encrypt> 標籤的內容進行解密，解密出來的明文即是使用者回覆訊息的明文
//接收並讀取POST過來的XML檔案流
string decryptionParame = null; // 解析之後的明文 // 注意注意:sCorpID
// @param sReceiveId: 不同場景含義不同，詳見文件說明（[訊息加密時為 CorpId]ToUserName：企業微信的CorpID，當為第三方應用回撥事件時，CorpID的內容為suiteid） WXBizMsgCrypt crypt = new WXBizMsgCrypt(sToken, sEncodingAESKey, xmlDoc.Root.Element("ToUserName").Value);
var result = crypt.DecryptMsg(signature, timestamp, nonce, postString, ref decryptionParame); if (result != 0)
{
return "fial";
} //響應應答處理
return new InstructionCallbackResponse().ReceiveResponse(decryptionParame, timestamp, signature,sToken, sEncodingAESKey, sCorpID);
}
}
catch (Exception ex)
{
//LoggerHelper._.Debug("異常：" + ex.Message);
} return "fail";
} /// <summary>
/// 驗證是否為空
/// </summary>
/// <param name="strParame">驗證引數</param>
/// <returns></returns>
private bool IsNullOrWhiteSpace(string strParame)
{
if (string.IsNullOrWhiteSpace(strParame))
{
return true;
}
else
{
return false;
}
} /// <summary>
/// 獲取post請求中的xml引數
/// </summary>
/// <returns></returns>
private string GetXMLParameters(HttpRequestBase Request)
{
string replyMsg;
using (Stream stream = Request.InputStream)
{
Byte[] postBytes = new Byte[stream.Length];
stream.Read(postBytes, 0, (Int32)stream.Length);
replyMsg = Encoding.UTF8.GetString(postBytes);
}
return replyMsg;
} }
指令回撥響應應答處理：
/// <summary>
/// 指令回撥響應應答處理
/// </summary>
public class InstructionCallbackResponse
{
/// <summary>
/// 響應應答處理
/// </summary>
/// <param name="sMsg">解密引數</param>
/// <param name="timestamp">時間戳</param>
/// <param name="signature">簽名</param>
/// <param name="sToken">企業微信後臺，開發者設定的Token</param>
/// <param name="sEncodingAESKey">開發者設定的EncodingAESKey</param>
/// <param name="sCorpID">業號corpid是企業號的專屬編號（CorpID）</param>
/// <returns></returns>
public string ReceiveResponse(string sMsg, string timestamp, string signature, string sToken, string sEncodingAESKey, string sCorpID)
{
string responseMessage = "success";//響應內容
var xmlDoc = XDocument.Parse(sMsg);//xml資料轉化 //區分普通訊息與第三方應用授權推送訊息，MsgType有值說明是普通訊息，反之則是第三方應用授權推送訊息
if (xmlDoc.Root.Element("MsgType") != null)
{
var msgType = (ResponseMsgType)Enum.Parse(typeof(ResponseMsgType), xmlDoc.Root.Element("MsgType").Value, true);
switch (msgType)
{
case ResponseMsgType.Text://文字訊息
responseMessage = ResponseMessageText(xmlDoc, timestamp, signature,sToken,sEncodingAESKey,sCorpID);
break;
case ResponseMsgType.Image:
responseMessage = ResponseMessageImage();
break;
case ResponseMsgType.Voice:
responseMessage = ResponseMessageVoice();
break;
case ResponseMsgType.Video:
responseMessage = ResponseMessageVideo();
break;
case ResponseMsgType.News:
responseMessage = ResponseMessageNews();
break;
}
}
else if (xmlDoc.Root.Element("InfoType") != null)
{
//第三方回撥
var infoType = (ResponseInfoType)Enum.Parse(typeof(ResponseInfoType), xmlDoc.Root.Element("InfoType").Value, true); switch (infoType)
{
case ResponseInfoType.suite_ticket:
{
//LoggerHelper._.Warn("suite_ticket===>>>>>,進來了，獲取到的SuiteTicket票據為" + xmlDoc.Root.Element("SuiteTicket").Value);
}
break;
}
}
else
{
//其他情況
} // result==0表示解密成功，sMsg表示解密之後的明文xml串
//伺服器未正確返回響應字串 “success”
return responseMessage;
} #region 相關事件實現 /// <summary>
/// 訊息文本回復
/// </summary>
/// <returns></returns>
public string ResponseMessageText(XDocument xmlDoc, string timestamp, string nonce,string sToken,string sEncodingAESKey,string sCorpID)
{
string FromUserName = xmlDoc.Root.Element("FromUserName").Value;
string ToUserName = xmlDoc.Root.Element("ToUserName").Value;
string Content = xmlDoc.Root.Element("Content").Value; string xml = "<xml>";
xml += "<ToUserName><![CDATA[" + ToUserName + "]]></ToUserName>";
xml += "<FromUserName><![CDATA[" + FromUserName + "]]></FromUserName>";
xml += "<CreateTime>" + GetCurrentTimeUnix() + "</CreateTime>";
xml += "<MsgType><![CDATA[text]]></MsgType>";
xml += "<Content><![CDATA[" + Content + "]]></Content>";
xml += "</xml>";
//"" + Content + "0";//回覆內容 FuncFlag設定為1的時候，自動星標剛才接收到的訊息，適合活動統計使用
WXBizMsgCrypt wxcpt = new WXBizMsgCrypt(sToken, sEncodingAESKey, sCorpID);
string sEncryptMsg = "";// 加密後的可以直接回複用戶的密文;
wxcpt.EncryptMsg(xml, timestamp, nonce, ref sEncryptMsg); //返回
return sEncryptMsg;
} /// <summary>
/// 圖片訊息
/// </summary>
/// <returns></returns> public string ResponseMessageImage()
{
return "success";
} /// <summary>
/// 語音訊息
/// </summary>
/// <returns></returns>
public string ResponseMessageVoice()
{
return "success";
} /// <summary>
/// 視訊訊息
/// </summary>
/// <returns></returns>
public string ResponseMessageVideo()
{
return "success";
} /// <summary>
/// 圖文訊息
/// </summary>
/// <returns></returns>
public string ResponseMessageNews()
{
return "success";
} #endregion /// <summary>
/// 獲取當前時間戳
/// </summary>
/// <returns></returns>
public static string GetCurrentTimeUnix()
{
TimeSpan cha = (DateTime.Now - TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1)));
long t = (long)cha.TotalSeconds;
return t.ToString();
}
}
訊息型別列舉（enumType）：
第三方應用授權推送訊息型別（ResponseInfoType）
/// <summary>
/// 第三方應用授權推送訊息型別
/// </summary>
public enum ResponseInfoType
{
/// <summary>
/// 推送suite_ticket 企業微信伺服器會定時（每十分鐘）推送ticket。ticket會實時變更，並用於後續介面的呼叫。
/// </summary>
suite_ticket =1, /// <summary>
/// 授權成功通知
/// </summary>
create_auth = 2, /// <summary>
/// 成員通知事件
/// </summary>
change_contact = 3
}
普通訊息響應型別（ResponseMsgType）
/// <summary>
/// 普通訊息響應型別
/// </summary>
public enum ResponseMsgType
{
/// <summary>
/// 文字訊息
/// </summary>
Text = 0,
/// <summary>
/// 圖文訊息
/// </summary>
News = 1,
/// <summary>
/// 圖片訊息
/// </summary>
Image = 3,
/// <summary>
/// 語音訊息
/// </summary>
Voice = 4,
/// <summary>
/// 視訊訊息
/// </summary>
Video = 5
}
C#解密類庫
WXBizMsgCrypt
public class WXBizMsgCrypt
{
string m_sToken;
string m_sEncodingAESKey;
string m_sReceiveId; //-40001 ： 簽名驗證錯誤
//-40002 : xml解析失敗
//-40003 : sha加密生成簽名失敗
//-40004 : AESKey 非法
//-40005 : corpid 校驗錯誤
//-40006 : AES 加密失敗
//-40007 ： AES 解密失敗
//-40008 ： 解密後得到的buffer非法
//-40009 : base64加密異常
//-40010 : base64解密異常 enum WXBizMsgCryptErrorCode
{
WXBizMsgCrypt_OK = 0,
WXBizMsgCrypt_ValidateSignature_Error = -40001,
WXBizMsgCrypt_ParseXml_Error = -40002,
WXBizMsgCrypt_ComputeSignature_Error = -40003,
WXBizMsgCrypt_IllegalAesKey = -40004,
WXBizMsgCrypt_ValidateCorpid_Error = -40005,
WXBizMsgCrypt_EncryptAES_Error = -40006,
WXBizMsgCrypt_DecryptAES_Error = -40007,
WXBizMsgCrypt_IllegalBuffer = -40008,
WXBizMsgCrypt_EncodeBase64_Error = -40009,
WXBizMsgCrypt_DecodeBase64_Error = -40010
}; //建構函式
// @param sToken: 企業微信後臺，開發者設定的Token
// @param sEncodingAESKey: 企業微信後臺，開發者設定的EncodingAESKey
// @param sReceiveId: 不同場景含義不同，詳見文件說明（[訊息加密時為 CorpId]ToUserName：企業微信的CorpID，當為第三方應用回撥事件時，CorpID的內容為suiteid）
public WXBizMsgCrypt(string sToken, string sEncodingAESKey, string sReceiveId)
{
m_sToken = sToken;
m_sReceiveId = sReceiveId;
m_sEncodingAESKey = sEncodingAESKey;
} //驗證URL
// @param sMsgSignature: 簽名串，對應URL引數的msg_signature
// @param sTimeStamp: 時間戳，對應URL引數的timestamp
// @param sNonce: 隨機串，對應URL引數的nonce
// @param sEchoStr: 隨機串，對應URL引數的echostr
// @param sReplyEchoStr: 解密之後的echostr，當return返回0時有效
// @return：成功0，失敗返回對應的錯誤碼
public int VerifyURL(string sMsgSignature, string sTimeStamp, string sNonce, string sEchoStr, ref string sReplyEchoStr)
{
int ret = 0;
if (m_sEncodingAESKey.Length != 43)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_IllegalAesKey;
}
ret = VerifySignature(m_sToken, sTimeStamp, sNonce, sEchoStr, sMsgSignature);
if (0 != ret)
{
return ret;
}
sReplyEchoStr = "";
string cpid = "";
try
{
sReplyEchoStr = Cryptography.AES_decrypt(sEchoStr, m_sEncodingAESKey, ref cpid); //m_sReceiveId);
}
catch (Exception)
{
sReplyEchoStr = "";
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecryptAES_Error;
}
if (cpid != m_sReceiveId)
{
sReplyEchoStr = "";
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ValidateCorpid_Error;
}
return 0;
} // 檢驗訊息的真實性，並且獲取解密後的明文
// @param sMsgSignature: 簽名串，對應URL引數的msg_signature
// @param sTimeStamp: 時間戳，對應URL引數的timestamp
// @param sNonce: 隨機串，對應URL引數的nonce
// @param sPostData: 密文，對應POST請求的資料
// @param sMsg: 解密後的原文，當return返回0時有效
// @return: 成功0，失敗返回對應的錯誤碼
public int DecryptMsg(string sMsgSignature, string sTimeStamp, string sNonce, string sPostData, ref string sMsg)
{
if (m_sEncodingAESKey.Length != 43)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_IllegalAesKey;
}
XmlDocument doc = new XmlDocument();
XmlNode root;
string sEncryptMsg;
try
{
doc.LoadXml(sPostData);
root = doc.FirstChild;
sEncryptMsg = root["Encrypt"].InnerText; LoggerHelper._.Info("進來解密了，解密密文sEncryptMsg為：" + sEncryptMsg);
}
catch (Exception)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ParseXml_Error;
}
//verify signature
int ret = 0;
ret = VerifySignature(m_sToken, sTimeStamp, sNonce, sEncryptMsg, sMsgSignature); LoggerHelper._.Info("進來解密了，解密結果：" + ret); if (ret != 0)
return ret;
//decrypt
string cpid = "";
try
{
sMsg = Cryptography.AES_decrypt(sEncryptMsg, m_sEncodingAESKey, ref cpid);
}
catch (FormatException)
{
sMsg = "";
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecodeBase64_Error;
}
catch (Exception)
{
sMsg = "";
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecryptAES_Error;
}
if (cpid != m_sReceiveId)
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ValidateCorpid_Error;
return 0;
} //將企業號回覆使用者的訊息加密打包
// @param sReplyMsg: 企業號待回覆使用者的訊息，xml格式的字串
// @param sTimeStamp: 時間戳，可以自己生成，也可以用URL引數的timestamp
// @param sNonce: 隨機串，可以自己生成，也可以用URL引數的nonce
// @param sEncryptMsg: 加密後的可以直接回複用戶的密文，包括msg_signature, timestamp, nonce, encrypt的xml格式的字串,當return返回0時有效
// return：成功0，失敗返回對應的錯誤碼
public int EncryptMsg(string sReplyMsg, string sTimeStamp, string sNonce, ref string sEncryptMsg)
{
if (m_sEncodingAESKey.Length != 43)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_IllegalAesKey;
}
string raw = "";
try
{
raw = Cryptography.AES_encrypt(sReplyMsg, m_sEncodingAESKey, m_sReceiveId);
}
catch (Exception)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_EncryptAES_Error;
}
string MsgSigature = "";
int ret = 0;
ret = GenarateSinature(m_sToken, sTimeStamp, sNonce, raw, ref MsgSigature);
if (0 != ret)
return ret;
sEncryptMsg = ""; string EncryptLabelHead = "<Encrypt><![CDATA[";
string EncryptLabelTail = "]]></Encrypt>";
string MsgSigLabelHead = "<MsgSignature><![CDATA[";
string MsgSigLabelTail = "]]></MsgSignature>";
string TimeStampLabelHead = "<TimeStamp><![CDATA[";
string TimeStampLabelTail = "]]></TimeStamp>";
string NonceLabelHead = "<Nonce><![CDATA[";
string NonceLabelTail = "]]></Nonce>";
sEncryptMsg = sEncryptMsg + "<xml>" + EncryptLabelHead + raw + EncryptLabelTail;
sEncryptMsg = sEncryptMsg + MsgSigLabelHead + MsgSigature + MsgSigLabelTail;
sEncryptMsg = sEncryptMsg + TimeStampLabelHead + sTimeStamp + TimeStampLabelTail;
sEncryptMsg = sEncryptMsg + NonceLabelHead + sNonce + NonceLabelTail;
sEncryptMsg += "</xml>";
return 0;
} public class DictionarySort : System.Collections.IComparer
{
public int Compare(object oLeft, object oRight)
{
string sLeft = oLeft as string;
string sRight = oRight as string;
int iLeftLength = sLeft.Length;
int iRightLength = sRight.Length;
int index = 0;
while (index < iLeftLength && index < iRightLength)
{
if (sLeft[index] < sRight[index])
return -1;
else if (sLeft[index] > sRight[index])
return 1;
else
index++;
}
return iLeftLength - iRightLength; }
}
//Verify Signature
private static int VerifySignature(string sToken, string sTimeStamp, string sNonce, string sMsgEncrypt, string sSigture)
{
string hash = "";
int ret = 0;
ret = GenarateSinature(sToken, sTimeStamp, sNonce, sMsgEncrypt, ref hash);
if (ret != 0)
return ret;
if (hash == sSigture)
return 0;
else
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ValidateSignature_Error;
}
} public static int GenarateSinature(string sToken, string sTimeStamp, string sNonce, string sMsgEncrypt, ref string sMsgSignature)
{
//校驗規則：https://work.weixin.qq.com/api/doc#90000/90139/90968/%E6%B6%88%E6%81%AF%E4%BD%93%E7%AD%BE%E5%90%8D%E6%A0%A1%E9%AA%8C ArrayList AL = new ArrayList();
AL.Add(sToken);
AL.Add(sTimeStamp);
AL.Add(sNonce);
AL.Add(sMsgEncrypt);
AL.Sort(new DictionarySort());
string raw = "";
for (int i = 0; i < AL.Count; ++i)
{
raw += AL[i];
} SHA1 sha;
ASCIIEncoding enc;
string hash = "";
try
{
sha = new SHA1CryptoServiceProvider();
enc = new ASCIIEncoding();
byte[] dataToHash = enc.GetBytes(raw);
byte[] dataHashed = sha.ComputeHash(dataToHash);
hash = BitConverter.ToString(dataHashed).Replace("-", "");
hash = hash.ToLower();
}
catch (Exception)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ComputeSignature_Error;
}
sMsgSignature = hash;
return 0;
} }
Cryptography
public class Cryptography
{
public static UInt32 HostToNetworkOrder(UInt32 inval)
{
UInt32 outval = 0;
for (int i = 0; i < 4; i++)
outval = (outval << 8) + ((inval >> (i * 8)) & 255);
return outval;
} public static Int32 HostToNetworkOrder(Int32 inval)
{
Int32 outval = 0;
for (int i = 0; i < 4; i++)
outval = (outval << 8) + ((inval >> (i * 8)) & 255);
return outval;
}
/// <summary>
/// 解密方法
/// </summary>
/// <param name="Input">密文</param>
/// <param name="EncodingAESKey"></param>
/// <returns></returns>
///
public static string AES_decrypt(String Input, string EncodingAESKey, ref string corpid)
{
byte[] Key;
Key = Convert.FromBase64String(EncodingAESKey + "=");
byte[] Iv = new byte[16];
Array.Copy(Key, Iv, 16);
byte[] btmpMsg = AES_decrypt(Input, Iv, Key); int len = BitConverter.ToInt32(btmpMsg, 16);
len = IPAddress.NetworkToHostOrder(len); byte[] bMsg = new byte[len];
byte[] bCorpid = new byte[btmpMsg.Length - 20 - len];
Array.Copy(btmpMsg, 20, bMsg, 0, len);
Array.Copy(btmpMsg, 20 + len, bCorpid, 0, btmpMsg.Length - 20 - len);
string oriMsg = Encoding.UTF8.GetString(bMsg);
corpid = Encoding.UTF8.GetString(bCorpid); return oriMsg;
} public static String AES_encrypt(String Input, string EncodingAESKey, string corpid)
{
byte[] Key;
Key = Convert.FromBase64String(EncodingAESKey + "=");
byte[] Iv = new byte[16];
Array.Copy(Key, Iv, 16);
string Randcode = CreateRandCode(16);
byte[] bRand = Encoding.UTF8.GetBytes(Randcode);
byte[] bCorpid = Encoding.UTF8.GetBytes(corpid);
byte[] btmpMsg = Encoding.UTF8.GetBytes(Input);
byte[] bMsgLen = BitConverter.GetBytes(HostToNetworkOrder(btmpMsg.Length));
byte[] bMsg = new byte[bRand.Length + bMsgLen.Length + bCorpid.Length + btmpMsg.Length]; Array.Copy(bRand, bMsg, bRand.Length);
Array.Copy(bMsgLen, 0, bMsg, bRand.Length, bMsgLen.Length);
Array.Copy(btmpMsg, 0, bMsg, bRand.Length + bMsgLen.Length, btmpMsg.Length);
Array.Copy(bCorpid, 0, bMsg, bRand.Length + bMsgLen.Length + btmpMsg.Length, bCorpid.Length); return AES_encrypt(bMsg, Iv, Key); }
private static string CreateRandCode(int codeLen)
{
string codeSerial = "2,3,4,5,6,7,a,c,d,e,f,h,i,j,k,m,n,p,r,s,t,A,C,D,E,F,G,H,J,K,M,N,P,Q,R,S,U,V,W,X,Y,Z";
if (codeLen == 0)
{
codeLen = 16;
}
string[] arr = codeSerial.Split(',');
string code = "";
int randValue = -1;
Random rand = new Random(unchecked((int)DateTime.Now.Ticks));
for (int i = 0; i < codeLen; i++)
{
randValue = rand.Next(0, arr.Length - 1);
code += arr[randValue];
}
return code;
} private static String AES_encrypt(String Input, byte[] Iv, byte[] Key)
{
//var aes = new RijndaelManaged();
#if NET45
var aes = new RijndaelManaged();
#else
var aes = Aes.Create();
#endif
//祕鑰的大小，以位為單位
aes.KeySize = 256;
//支援的塊大小
aes.BlockSize = 128;
//填充模式
aes.Padding = PaddingMode.PKCS7;
aes.Mode = CipherMode.CBC;
aes.Key = Key;
aes.IV = Iv;
var encrypt = aes.CreateEncryptor(aes.Key, aes.IV);
byte[] xBuff = null; using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, encrypt, CryptoStreamMode.Write))
{
byte[] xXml = Encoding.UTF8.GetBytes(Input);
cs.Write(xXml, 0, xXml.Length);
}
xBuff = ms.ToArray();
}
String Output = Convert.ToBase64String(xBuff);
return Output;
} private static String AES_encrypt(byte[] Input, byte[] Iv, byte[] Key)
{
//var aes = new RijndaelManaged();
#if NET45
var aes = new RijndaelManaged();
#else
var aes = Aes.Create();
#endif
//祕鑰的大小，以位為單位
aes.KeySize = 256;
//支援的塊大小
aes.BlockSize = 128;
//填充模式
//aes.Padding = PaddingMode.PKCS7;
aes.Padding = PaddingMode.None;
aes.Mode = CipherMode.CBC;
aes.Key = Key;
aes.IV = Iv;
var encrypt = aes.CreateEncryptor(aes.Key, aes.IV);
byte[] xBuff = null; #region 自己進行PKCS7補位，用系統自己帶的不行
byte[] msg = new byte[Input.Length + 32 - Input.Length % 32];
Array.Copy(Input, msg, Input.Length);
byte[] pad = KCS7Encoder(Input.Length);
Array.Copy(pad, 0, msg, Input.Length, pad.Length);
#endregion #region 註釋的也是一種方法，效果一樣
//ICryptoTransform transform = aes.CreateEncryptor();
//byte[] xBuff = transform.TransformFinalBlock(msg, 0, msg.Length);
#endregion using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, encrypt, CryptoStreamMode.Write))
{
cs.Write(msg, 0, msg.Length);
}
xBuff = ms.ToArray();
} String Output = Convert.ToBase64String(xBuff);
return Output;
} private static byte[] KCS7Encoder(int text_length)
{
int block_size = 32;
// 計算需要填充的位數
int amount_to_pad = block_size - (text_length % block_size);
if (amount_to_pad == 0)
{
amount_to_pad = block_size;
}
// 獲得補位所用的字元
char pad_chr = chr(amount_to_pad);
string tmp = "";
for (int index = 0; index < amount_to_pad; index++)
{
tmp += pad_chr;
}
return Encoding.UTF8.GetBytes(tmp);
}
/**
* 將數字轉化成ASCII碼對應的字元，用於對明文進行補碼
*
* @param a 需要轉化的數字
* @return 轉化得到的字元
*/
static char chr(int a)
{ byte target = (byte)(a & 0xFF);
return (char)target;
}
private static byte[] AES_decrypt(String Input, byte[] Iv, byte[] Key)
{
//RijndaelManaged aes = new RijndaelManaged();
#if NET45
var aes = new RijndaelManaged();
#else
var aes = Aes.Create();
#endif
aes.KeySize = 256;
aes.BlockSize = 128;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
aes.Key = Key;
aes.IV = Iv;
var decrypt = aes.CreateDecryptor(aes.Key, aes.IV);
byte[] xBuff = null;
using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, decrypt, CryptoStreamMode.Write))
{
byte[] xXml = Convert.FromBase64String(Input);
byte[] msg = new byte[xXml.Length + 32 - xXml.Length % 32];
Array.Copy(xXml, msg, xXml.Length);
cs.Write(xXml, 0, xXml.Length);
}
xBuff = decode2(ms.ToArray());
}
return xBuff;
}
private static byte[] decode2(byte[] decrypted)
{
int pad = (int)decrypted[decrypted.Length - 1];
if (pad < 1 || pad > 32)
{
pad = 0;
}
byte[] res = new byte[decrypted.Length - pad];
Array.Copy(decrypted, 0, res, 0, decrypted.Length - pad);
return res;
}
}
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