nodejs 实现钉钉ISV接入的加密解密方法

这是我开发Worktile钉钉版本的时候遇到的当时感觉比较难的地方，现在写下来方法供大家学习交流

解密方法

exports.decryptMsg = function (text) {
var aes_msg_buffer = new Buffer(text, 'base64');
var key = new Buffer(aes_key + "=", 'base64');
var iv = key.slice(0, 16);
var decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
var dec = decipher.write(aes_msg_buffer);
dec = decipher.read();
var msg_leng_buffer = dec.slice(16, 20);
var msg_length = msg_leng_buffer.readInt32BE();
var rand_buffer = dec.slice(20, 20 + msg_length);
var msg = rand_buffer.toString("utf-8");
var result = JSON.parse(msg);
return result;
};

加密方法

exports.encrypt_text = function (text, aes_key, suiteKey) {
var key = new Buffer(aes_key + "=", 'base64');
var iv = key.slice(0, 16);
var random_buffer = new Buffer(exports.getRandomStr(16), 'utf-8');
var buffer = new Buffer(text, 'utf-8');
var length_buffer = new Buffer(4);
length_buffer.writeUInt32BE(buffer.length, 0);
var corpidBytes = new Buffer(suiteKey, 'utf-8');
var newBuffer = Buffer.concat([random_buffer, length_buffer, buffer, corpidBytes]);
var cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
//cipher.write(newBuffer);
//var dec = cipher.read();
var cipheredMsg = Buffer.concat([cipher.update(/*encoded*/newBuffer), cipher.final()]);
return cipheredMsg.toString('base64');
};

签名方法

var arr =[token, timestamp, nonce, res_encrypt] //token 是配置钉钉套件的token，timestamp时间戳， nonce随机字符串， res_encrypt是上面加密后的结果
exports.signature_arr = function (arr) {
arr.sort();
var str = "";
for (var i = 0; i < arr.length; i++) {
str += arr[i];
}
var sha1 = crypto.createHash('sha1');
sha1.update(str);
var msg_signature = sha1.digest('hex');
return msg_signature;
};

以上所述是小编给大家介绍的nodejs 实现钉钉ISV接入的加密解密方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！

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