108 lines
4.9 KiB
C++
108 lines
4.9 KiB
C++
#pragma once
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#include <stdint.h>
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#include <string>
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namespace Tencent {
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static const unsigned int kAesKeySize = 32;
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static const unsigned int kAesIVSize = 16;
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static const unsigned int kEncodingKeySize = 43;
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static const unsigned int kRandEncryptStrLen = 16;
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static const unsigned int kMsgLen = 4;
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static const unsigned int kMaxBase64Size = 1000000000;
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enum WXBizMsgCryptErrorCode {
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WXBizMsgCrypt_OK = 0,
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WXBizMsgCrypt_ValidateSignature_Error = -40001,
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WXBizMsgCrypt_ParseXml_Error = -40002,
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WXBizMsgCrypt_ComputeSignature_Error = -40003,
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WXBizMsgCrypt_IllegalAesKey = -40004,
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WXBizMsgCrypt_ValidateCorpid_Error = -40005,
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WXBizMsgCrypt_EncryptAES_Error = -40006,
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WXBizMsgCrypt_DecryptAES_Error = -40007,
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WXBizMsgCrypt_IllegalBuffer = -40008,
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WXBizMsgCrypt_EncodeBase64_Error = -40009,
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WXBizMsgCrypt_DecodeBase64_Error = -40010,
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WXBizMsgCrypt_GenReturnXml_Error = -40011,
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};
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class WXBizMsgCrypt {
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public:
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// 构造函数
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// @param sToken: 企业微信后台，开发者设置的Token
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// @param sEncodingAESKey: 企业微信后台，开发者设置的EncodingAESKey
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// @param sReceiveId: 不同场景含义不同，详见文档
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WXBizMsgCrypt(const std::string &sToken, const std::string &sEncodingAESKey, const std::string &sReceiveId)
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: m_sToken(sToken), m_sEncodingAESKey(sEncodingAESKey), m_sReceiveId(sReceiveId) {
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}
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// 验证URL
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// @param sMsgSignature: 签名串，对应URL参数的msg_signature
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// @param sTimeStamp: 时间戳，对应URL参数的timestamp
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// @param sNonce: 随机串，对应URL参数的nonce
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// @param sEchoStr: 随机串，对应URL参数的echostr
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// @param sReplyEchoStr: 解密之后的echostr，当return返回0时有效
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// @return：成功0，失败返回对应的错误码
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int VerifyURL(const std::string &sMsgSignature, const std::string &sTimeStamp, const std::string &sNonce,
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const std::string &sEchoStr, std::string &sReplyEchoStr);
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// 检验消息的真实性，并且获取解密后的明文
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// @param sMsgSignature: 签名串，对应URL参数的msg_signature
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// @param sTimeStamp: 时间戳，对应URL参数的timestamp
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// @param sNonce: 随机串，对应URL参数的nonce
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// @param sPostData: 密文，对应POST请求的数据
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// @param sMsg: 解密后的原文，当return返回0时有效
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// @return: 成功0，失败返回对应的错误码
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int DecryptMsg(const std::string &sMsgSignature, const std::string &sTimeStamp, const std::string &sNonce,
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const std::string &sPostData, std::string &sMsg);
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// 将企业微信回复用户的消息加密打包
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// @param sReplyMsg:企业微信待回复用户的消息，xml格式的字符串
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// @param sTimeStamp: 时间戳，可以自己生成，也可以用URL参数的timestamp
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// @param sNonce: 随机串，可以自己生成，也可以用URL参数的nonce
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// @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,
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// 当return返回0时有效
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// return：成功0，失败返回对应的错误码
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int EncryptMsg(const std::string &sReplyMsg, const std::string &sTimeStamp, const std::string &sNonce,
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std::string &sEncryptMsg);
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private:
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std::string m_sToken;
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std::string m_sEncodingAESKey;
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std::string m_sReceiveId;
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private:
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// AES CBC
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int AES_CBCEncrypt(const char *sSource, const uint32_t iSize, const char *sKey, unsigned int iKeySize, std::string *poResult);
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int AES_CBCEncrypt(const std::string &objSource, const std::string &objKey, std::string *poResult);
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int AES_CBCDecrypt(const char *sSource, const uint32_t iSize, const char *sKey, uint32_t iKeySize, std::string *poResult);
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int AES_CBCDecrypt(const std::string &objSource, const std::string &objKey, std::string *poResult);
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// base64
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int EncodeBase64(const std::string sSrc, std::string &sTarget);
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int DecodeBase64(const std::string sSrc, std::string &sTarget);
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// genkey
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int GenAesKeyFromEncodingKey(const std::string &sEncodingKey, std::string &sAesKey);
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// signature
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int ComputeSignature(const std::string sToken, const std::string sTimeStamp, const std::string &sNonce,
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const std::string &sMessage, std::string &sSignature);
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int ValidateSignature(const std::string &sMsgSignature, const std::string &sTimeStamp, const std::string &sNonce,
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const std::string &sEncryptMsg);
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// get , set data
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void GenRandStr(std::string &sRandStr, uint32_t len);
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void GenNeedEncryptData(const std::string &sReplyMsg, std::string &sNeedEncrypt);
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int GenReturnXml(const std::string &sEncryptMsg, const std::string &sSignature, const std::string &sTimeStamp,
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const std::string &sNonce, std::string &sResult);
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};
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} // namespace Tencent
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