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@@ -1,35 +0,0 @@
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-var crypto = require('crypto')
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-
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-function WXBizDataCrypt(appId, sessionKey) {
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- this.appId = appId
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- this.sessionKey = sessionKey
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-}
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-
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-WXBizDataCrypt.prototype.decryptData = function (encryptedData, iv) {
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- // base64 decode
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- var sessionKey = new Buffer(this.sessionKey, 'base64')
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- encryptedData = new Buffer(encryptedData, 'base64')
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- iv = new Buffer(iv, 'base64')
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-
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- try {
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- // 解密
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- var decipher = crypto.createDecipheriv('aes-128-cbc', sessionKey, iv)
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- // 设置自动 padding 为 true,删除填充补位
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- decipher.setAutoPadding(true)
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- var decoded = decipher.update(encryptedData, 'binary', 'utf8')
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- decoded += decipher.final('utf8')
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-
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- decoded = JSON.parse(decoded)
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-
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- } catch (err) {
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- throw new Error('Illegal Buffer')
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- }
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-
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- if (decoded.watermark.appid !== this.appId) {
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- throw new Error('Illegal Buffer')
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- }
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-
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- return decoded
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-}
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-
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-module.exports = WXBizDataCrypt
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