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Commit 844518af authored by 黄奎's avatar 黄奎
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Mall.Common/WechatMessage/Cryptography.cs 0 → 100644
View file @ 844518af
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using System.Net;
namespace Tencent
{
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 appid)
{
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[] bAppid = new byte[btmpMsg.Length - 20 - len];
Array.Copy(btmpMsg, 20, bMsg, 0, len);
Array.Copy(btmpMsg, 20+len , bAppid, 0, btmpMsg.Length - 20 - len);
string oriMsg = Encoding.UTF8.GetString(bMsg);
appid = Encoding.UTF8.GetString(bAppid);
return oriMsg;
}
public static String AES_encrypt(String Input, string EncodingAESKey, string appid)
{
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[] bAppid = Encoding.UTF8.GetBytes(appid);
byte[] btmpMsg = Encoding.UTF8.GetBytes(Input);
byte[] bMsgLen = BitConverter.GetBytes(HostToNetworkOrder(btmpMsg.Length));
byte[] bMsg = new byte[bRand.Length + bMsgLen.Length + bAppid.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(bAppid, 0, bMsg, bRand.Length + bMsgLen.Length + btmpMsg.Length, bAppid.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();
//秘钥的大小，以位为单位
aes.KeySize = 256;
//支持的块大小
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();
//秘钥的大小，以位为单位
aes.KeySize = 256;
//支持的块大小
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 自己进行PKCS7补位，用系统自己带的不行
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 注释的也是一种方法，效果一样
//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;
// 计算需要填充的位数
int amount_to_pad = block_size - (text_length % block_size);
if (amount_to_pad == 0)
{
amount_to_pad = block_size;
}
// 获得补位所用的字符
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);
}
/**
* 将数字转化成ASCII码对应的字符，用于对明文进行补码
*
* @param a 需要转化的数字
* @return 转化得到的字符
*/
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();
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;
}
}
}
Mall.Common/WechatMessage/Readme.txt 0 → 100644
View file @ 844518af
注意事项
1.Cryptography.cs文件封装了AES加解密过程，用户无须关心具体实现。WXBizMsgCrypt.cs文件提供了用户接入企业微信的两个接口，Sample.cs文件提供了如何使用这两个接口的示例。
2.WXBizMsgCrypt.cs封装了DecryptMsg, EncryptMsg两个接口，分别用于收到用户回复消息的解密以及开发者回复消息的加密过程。使用方法可以参考Sample.cs文件。
3.加解密协议请参考微信公众平台官方文档。
\ No newline at end of file
Mall.Common/WechatMessage/Sample.cs 0 → 100644
View file @ 844518af
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
namespace MsgCryptTest
{
class Sample
{
static void Main(string[] args)
{
//公众平台上开发者设置的token, appID, EncodingAESKey
string sToken = "QDG6eK";
string sAppID = "wx5823bf96d3bd56c7";
string sEncodingAESKey = "jWmYm7qr5nMoAUwZRjGtBxmz3KA1tkAj3ykkR6q2B2C";
Tencent.WXBizMsgCrypt wxcpt = new Tencent.WXBizMsgCrypt(sToken, sEncodingAESKey, sAppID);
/* 1. 对用户回复的数据进行解密。
* 用户回复消息或者点击事件响应时，企业会收到回调消息，假设企业收到的推送消息：
* POST /cgi-bin/wxpush? msg_signature=477715d11cdb4164915debcba66cb864d751f3e6&timestamp=1409659813&nonce=1372623149 HTTP/1.1
Host: qy.weixin.qq.com
Content-Length: 613
*
* <xml>
<ToUserName><![CDATA[wx5823bf96d3bd56c7]]></ToUserName>
<Encrypt><![CDATA[RypEvHKD8QQKFhvQ6QleEB4J58tiPdvo+rtK1I9qca6aM/wvqnLSV5zEPeusUiX5L5X/0lWfrf0QADHHhGd3QczcdCUpj911L3vg3W/sYYvuJTs3TUUkSUXxaccAS0qhxchrRYt66wiSpGLYL42aM6A8dTT+6k4aSknmPj48kzJs8qLjvd4Xgpue06DOdnLxAUHzM6+kDZ+HMZfJYuR+LtwGc2hgf5gsijff0ekUNXZiqATP7PF5mZxZ3Izoun1s4zG4LUMnvw2r+KqCKIw+3IQH03v+BCA9nMELNqbSf6tiWSrXJB3LAVGUcallcrw8V2t9EL4EhzJWrQUax5wLVMNS0+rUPA3k22Ncx4XXZS9o0MBH27Bo6BpNelZpS+/uh9KsNlY6bHCmJU9p8g7m3fVKn28H3KDYA5Pl/T8Z1ptDAVe0lXdQ2YoyyH2uyPIGHBZZIs2pDBS8R07+qN+E7Q==]]></Encrypt>
</xml>
*/
string sReqMsgSig = "477715d11cdb4164915debcba66cb864d751f3e6";
string sReqTimeStamp = "1409659813";
string sReqNonce = "1372623149";
string sReqData = "<xml><ToUserName><![CDATA[wx5823bf96d3bd56c7]]></ToUserName><Encrypt><![CDATA[RypEvHKD8QQKFhvQ6QleEB4J58tiPdvo+rtK1I9qca6aM/wvqnLSV5zEPeusUiX5L5X/0lWfrf0QADHHhGd3QczcdCUpj911L3vg3W/sYYvuJTs3TUUkSUXxaccAS0qhxchrRYt66wiSpGLYL42aM6A8dTT+6k4aSknmPj48kzJs8qLjvd4Xgpue06DOdnLxAUHzM6+kDZ+HMZfJYuR+LtwGc2hgf5gsijff0ekUNXZiqATP7PF5mZxZ3Izoun1s4zG4LUMnvw2r+KqCKIw+3IQH03v+BCA9nMELNqbSf6tiWSrXJB3LAVGUcallcrw8V2t9EL4EhzJWrQUax5wLVMNS0+rUPA3k22Ncx4XXZS9o0MBH27Bo6BpNelZpS+/uh9KsNlY6bHCmJU9p8g7m3fVKn28H3KDYA5Pl/T8Z1ptDAVe0lXdQ2YoyyH2uyPIGHBZZIs2pDBS8R07+qN+E7Q==]]></Encrypt></xml>";
string sMsg = ""; //解析之后的明文
int ret = 0;
ret = wxcpt.DecryptMsg(sReqMsgSig, sReqTimeStamp, sReqNonce, sReqData, ref sMsg);
if (ret != 0)
{
System.Console.WriteLine("ERR: Decrypt fail, ret: " + ret);
return;
}
System.Console.WriteLine(sMsg);
/*
* 2. 企业回复用户消息也需要加密和拼接xml字符串。
* 假设企业需要回复用户的消息为：
* <xml>
* <ToUserName><![CDATA[mycreate]]></ToUserName>
* <FromUserName><![CDATA[wx5823bf96d3bd56c7]]></FromUserName>
* <CreateTime>1348831860</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
* <Content><![CDATA[this is a test]]></Content>
* <MsgId>1234567890123456</MsgId>
* </xml>
* 生成xml格式的加密消息过程为：
*/
string sRespData = "<xml><ToUserName><![CDATA[mycreate]]></ToUserName><FromUserName><![CDATA[wx582测试一下中文的情况，消息长度是按字节来算的396d3bd56c7]]></FromUserName><CreateTime>1348831860</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[this is a test]]></Content><MsgId>1234567890123456</MsgId></xml>";
string sEncryptMsg = ""; //xml格式的密文
ret = wxcpt.EncryptMsg(sRespData, sReqTimeStamp, sReqNonce, ref sEncryptMsg);
System.Console.WriteLine("sEncryptMsg");
System.Console.WriteLine(sEncryptMsg);
/*测试：
* 将sEncryptMsg解密看看是否是原文
* */
XmlDocument doc = new XmlDocument();
doc.LoadXml(sEncryptMsg);
XmlNode root = doc.FirstChild;
string sig = root["MsgSignature"].InnerText;
string enc = root["Encrypt"].InnerText;
string timestamp = root["TimeStamp"].InnerText;
string nonce = root["Nonce"].InnerText;
string stmp = "";
ret = wxcpt.DecryptMsg(sig, timestamp, nonce, sEncryptMsg, ref stmp);
System.Console.WriteLine("stemp");
System.Console.WriteLine(stmp + ret);
return;
}
}
}
Mall.Common/WechatMessage/WXBizMsgCrypt.cs 0 → 100644
View file @ 844518af
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Collections;
//using System.Web;
using System.Security.Cryptography;
//-40001 ： 签名验证错误
//-40002 : xml解析失败
//-40003 : sha加密生成签名失败
//-40004 : AESKey 非法
//-40005 : appid 校验错误
//-40006 : AES 加密失败
//-40007 ： AES 解密失败
//-40008 ： 解密后得到的buffer非法
//-40009 : base64加密异常
//-40010 : base64解密异常
namespace Tencent
{
public class WXBizMsgCrypt
{
string m_sToken;
string m_sEncodingAESKey;
string m_sAppID;
enum WXBizMsgCryptErrorCode
{
WXBizMsgCrypt_OK = 0,
WXBizMsgCrypt_ValidateSignature_Error = -40001,
WXBizMsgCrypt_ParseXml_Error = -40002,
WXBizMsgCrypt_ComputeSignature_Error = -40003,
WXBizMsgCrypt_IllegalAesKey = -40004,
WXBizMsgCrypt_ValidateAppid_Error = -40005,
WXBizMsgCrypt_EncryptAES_Error = -40006,
WXBizMsgCrypt_DecryptAES_Error = -40007,
WXBizMsgCrypt_IllegalBuffer = -40008,
WXBizMsgCrypt_EncodeBase64_Error = -40009,
WXBizMsgCrypt_DecodeBase64_Error = -40010
};
//构造函数
// @param sToken: 公众平台上，开发者设置的Token
// @param sEncodingAESKey: 公众平台上，开发者设置的EncodingAESKey
// @param sAppID: 公众帐号的appid
public WXBizMsgCrypt(string sToken, string sEncodingAESKey, string sAppID)
{
m_sToken = sToken;
m_sAppID = sAppID;
m_sEncodingAESKey = sEncodingAESKey;
}
// 检验消息的真实性，并且获取解密后的明文
// @param sMsgSignature: 签名串，对应URL参数的msg_signature
// @param sTimeStamp: 时间戳，对应URL参数的timestamp
// @param sNonce: 随机串，对应URL参数的nonce
// @param sPostData: 密文，对应POST请求的数据
// @param sMsg: 解密后的原文，当return返回0时有效
// @return: 成功0，失败返回对应的错误码
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;
}
catch (Exception)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ParseXml_Error;
}
//verify signature
int ret = 0;
ret = VerifySignature(m_sToken, sTimeStamp, sNonce, sEncryptMsg, sMsgSignature);
if (ret != 0)
return ret;
//decrypt
string cpid = "";
try
{
sMsg = Cryptography.AES_decrypt(sEncryptMsg, m_sEncodingAESKey, ref cpid);
}
catch (FormatException)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecodeBase64_Error;
}
catch (Exception)
{
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_DecryptAES_Error;
}
if (cpid != m_sAppID)
return (int)WXBizMsgCryptErrorCode.WXBizMsgCrypt_ValidateAppid_Error;
return 0;
}
//将企业号回复用户的消息加密打包
// @param sReplyMsg: 企业号待回复用户的消息，xml格式的字符串
// @param sTimeStamp: 时间戳，可以自己生成，也可以用URL参数的timestamp
// @param sNonce: 随机串，可以自己生成，也可以用URL参数的nonce
// @param sEncryptMsg: 加密后的可以直接回复用户的密文，包括msg_signature, timestamp, nonce, encrypt的xml格式的字符串,
// 当return返回0时有效
// return：成功0，失败返回对应的错误码
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_sAppID);
}
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
public 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;
//System.Console.WriteLine(hash);
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)
{
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;
}
}
}
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