34 lines
1.0 KiB
JavaScript
34 lines
1.0 KiB
JavaScript
var Crypto = require('./cryptojs/cryptojs.js').Crypto;
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var app = getApp();
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function RdWXBizDataCrypt(appId, sessionKey) {
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this.appId = appId
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this.sessionKey = sessionKey
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}
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RdWXBizDataCrypt.prototype.decryptData = function (encryptedData, iv) {
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// base64 decode ：使用 CryptoJS 中 Crypto.util.base64ToBytes()进行 base64解码
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var encryptedData = Crypto.util.base64ToBytes(encryptedData)
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// console.log(sessionKey)
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var key = Crypto.util.base64ToBytes(this.sessionKey);
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var iv = Crypto.util.base64ToBytes(iv);
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// console.log(encryptedData,key,iv)
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// 对称解密使用的算法为 AES-128-CBC，数据采用PKCS#7填充
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var mode = new Crypto.mode.CBC(Crypto.pad.pkcs7);
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try {
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// 解密
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var bytes = Crypto.AES.decrypt(encryptedData, key, {
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asBpytes: true,
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iv: iv,
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mode: mode
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});
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var decryptResult = JSON.parse(bytes);
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} catch (err) {
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console.log(err)
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}
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if (decryptResult.watermark.appid !== this.appId) {
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console.log(err)
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}
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return decryptResult
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}
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module.exports = RdWXBizDataCrypt |