feat: Postman 预请求处理脚本
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358
instagram-prerequest-script.js
Normal file
358
instagram-prerequest-script.js
Normal file
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function Base64 () {
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// private property
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this._keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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}
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//public method for encoding
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Base64.prototype.encode = function (input) {
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let output = "", chr1, chr2, chr3, enc1, enc2, enc3, enc4, i = 0;
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input = this._utf8_encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output +
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this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
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this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
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}
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return output;
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}
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// public method for decoding
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Base64.prototype.decode = function (input) {
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let output = "", chr1, chr2, chr3, enc1, enc2, enc3, enc4, i = 0;
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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while (i < input.length) {
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enc1 = this._keyStr.indexOf(input.charAt(i++));
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enc2 = this._keyStr.indexOf(input.charAt(i++));
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enc3 = this._keyStr.indexOf(input.charAt(i++));
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enc4 = this._keyStr.indexOf(input.charAt(i++));
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chr1 = (enc1 << 2) | (enc2 >> 4);
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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chr3 = ((enc3 & 3) << 6) | enc4;
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output = output + String.fromCharCode(chr1);
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if (enc3 != 64) {
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output = output + String.fromCharCode(chr2);
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}
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if (enc4 != 64) {
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output = output + String.fromCharCode(chr3);
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}
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}
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output = this._utf8_decode(output);
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return output;
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}
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// private method for UTF-8 encoding
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Base64.prototype._utf8_encode = function (string) {
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string = string.replace(/\r\n/g, "\n");
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let utftext = "";
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for (let n = 0; n < string.length; n++) {
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let c = string.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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} else if ((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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} else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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}
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// private method for UTF-8 decoding
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Base64.prototype._utf8_decode = function (utftext) {
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let string = "", i = 0, c = 0, c1 = 0, c2 = 0, c3 = 0;
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while (i < utftext.length) {
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c = utftext.charCodeAt(i);
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if (c < 128) {
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string += String.fromCharCode(c);
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i++;
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} else if ((c > 191) && (c < 224)) {
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c2 = utftext.charCodeAt(i + 1);
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string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
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i += 2;
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} else {
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c2 = utftext.charCodeAt(i + 1);
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c3 = utftext.charCodeAt(i + 2);
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string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
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i += 3;
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}
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}
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return string;
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}
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let Base = new Base64();
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function md5 (str) {
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return CryptoJS.MD5(str).toString()
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}
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function addinterruptchars (str) {
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let $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
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let maxPos = $chars.length;
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let newstr = '';
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for (let i = 0; i < str.length; i++) {
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newstr = newstr + str.charAt(i) + $chars.charAt(Math.floor(Math.random() * maxPos));
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}
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return newstr;
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}
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function authcode (string, isencrypt) {
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let timestamp = Date.parse(new Date()) / 1000;//;
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if (isencrypt)
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string = string + timestamp;
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let ckey_length = 5;
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// 密匙
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// let key = postman.getEnvironmentletiable("encryptkey");
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let key = pm.environment.get('encryptkey')
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key = md5(key)
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// 密匙a会参与加解密
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let keya = md5(key.substr(0, 12));
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//console.log('keya:'+keya)
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// 密匙b会用来做数据完整性验证
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let keyb = md5(key.substr(12, 20));
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// 密匙c用于变化生成的密文
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//console.log('keyb:'+keyb)
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let keyc = isencrypt ? md5(timestamp).substr(32 - ckey_length) : string.substr(0, ckey_length);
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//console.log('keyc:'+keyc)
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// 参与运算的密匙
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let cryptkey = keya + md5(keya + keyc);
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let key_length = cryptkey.length;
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console.log('cryptkey:' + cryptkey)
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let tempstr = md5(string + keyb).substr(0, 18);//检验字符串
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string = isencrypt ? (timestamp + 120) + tempstr + string : Base.decode(string.substr(ckey_length));//timestamp+120过期时间
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let string_length = string.length;
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//console.log('string='+string+' length='+string_length);
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let result = '';
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let box = [];
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let rndkey = [];
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// 128是ascrii码,字符范围,也可取256以内其它数字,产生密匙簿,加解密的cryptkey是相同的,由当时时间md5生成的
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for (let i = 0; i < 128; i++) {
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rndkey[i] = cryptkey.charCodeAt(i % key_length);
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box[i] = i;
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}
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let tmp;
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// 用固定的算法，打乱密匙簿，增加随机性，好像很复杂，实际上对并不会增加密文的强度
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for (let j = 0, i = 0; i < 128; i++) {
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j = (j + box[i] + rndkey[i]) % 128;//rndkey[i]是随机数,j是也是随机,加起来也是随机数
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tmp = box[i];
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box[i] = box[j];
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box[j] = tmp;
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}
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// 核心加解密部分
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for (let a = j = i = 0; i < string_length; i++) {
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a = (a + 1) % 128;
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j = (j + box[a]) % 128;
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tmp = box[a];//再次打乱
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box[a] = box[j];
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box[j] = tmp;
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// 从密匙簿得出密匙进行异或，再转成字符
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let b = box[(box[a] + box[j]) % 128];
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let c = a ^ b;
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let d = String.fromCharCode(c);
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result += String.fromCharCode(string.charCodeAt(i) ^ (box[(box[a] + box[j]) % 128]));
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}
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//console.log('result='+result);
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if (isencrypt) {
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// 把动态密匙保存在密文里，这也是为什么同样的明文，生产不同密文后能解密的原因
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// 因为加密后的密文可能是一些特殊字符，复制过程可能会丢失，所以用base64编码
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return keyc + Base.encode(result);
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}
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else {
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return result.substr(28)
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}
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}
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function randomString (len) {
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len = len || 32;
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let $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678';
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let maxPos = $chars.length;
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let pwd = '';
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for (let i = 0; i < len; i++) {
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pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
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}
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return pwd;
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}
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function aesEncrypt (message, key, iv) {
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let ciphertext = CryptoJS.AES.encrypt(message, key, {
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iv: iv,
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mode: CryptoJS.mode.CBC,
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padding: CryptoJS.pad.Pkcs7
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});
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//return ciphertext;//密码对象(Obejct类型，非WordArray类型)，Base64编码。
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return ciphertext.toString();//密码对象的Base64字符串
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}
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if (pm.environment.get("isencrypt") == 1) {
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hasparam = 1
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// try {
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// ps = pm.request.body.urlencoded.members
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// }
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// catch (err) {
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// console.log('没有设置参数')
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// hasparam = 0
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// pm.request.body.urlencoded = new Array()
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// }
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//let param={'key':'zyh','value':'lisi'}
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//pm.request.body.urlencoded.members.push(param)
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console.log('hasparam值：', hasparam)
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console.log('请求参数：', pm.request.body.urlencoded.members)
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// if (hasparam == 0) {
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// console.log('请求参数：', pm.request.body.urlencoded.members)
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// }
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let oldparams = {};
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let params = {};
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let ps = pm.request.body.urlencoded.members;
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// if (!ps) {
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// ps = []
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// }
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let regex = /\{{2}(\w+)\}{2}/
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for (let i = 0; i < ps.length; i++) {
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let param = ps[i]
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let value = param.value
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let vReg = regex.exec(value)
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let key = param.key
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oldparams[key] = value
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if (param.disabled == true || key == "receipt") {
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//console.log('disabled:'+key)
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continue
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}
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if (key == 'params') {
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continue
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}
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if (vReg !== null && vReg.length > 1) {
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console.log(key, pm.environment.get(vReg[1]))
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params[encodeURIComponent(key)] = pm.environment.get(vReg[1])
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} else {
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params[encodeURIComponent(key)] = value;
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}
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}
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console.log('params:', params)
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if (!oldparams.hasOwnProperty('app_bundle_id')) {
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params['app_bundle_id'] = pm.environment.get('app_bundle_id');
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}
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if (!oldparams.hasOwnProperty('device_id')) {
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params['device_id'] = pm.environment.get('device_id');
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}
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if (!oldparams.hasOwnProperty('token')) {
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params['token'] = pm.environment.get('token');
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}
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// 其他基础参数
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params['lang'] = pm.environment.get('lang');
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params['timezone'] = pm.environment.get('timezone');
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params['platform'] = pm.environment.get('platform');
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params['app_name'] = pm.environment.get('app_name');
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params['device_version'] = pm.environment.get('device_version');
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let jsonstr = JSON.stringify(params);
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// let jsonstr='{"app_bundle_id":"com.ylp.qrforfollowers","app_name":"qrforfollowers","app_version":"1.2","device_id":"EA7FA2BA-92FC-4538-93F7-B00E1B90A4F3","device_version":"12.1.2","instagram_id":"2207136901","lang":"zh-Hans-CN","password":"edee9KBx+HBBzOm8WS1pJHgB6aTIMMlYJLAZ8HT9Ban55MTkvTgUvB0NBcVgtO0Mb","platform":"iOS","timezone":"Asia/Shanghai","username":"sherryboa","token":"b6ea6b8fd7a4e00cb9e172a17a035ef5"}'
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let CryptoJS = require("crypto-js");
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let iv = randomString(16)
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//let iv='JdG3kecbQPSWKHKp'
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console.log('iv转类型 ' + CryptoJS.enc.Utf8.parse(iv))
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//let iv='1111111111111111'
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// let cryptkey = postman.getEnvironmentletiable("encryptkey");
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let cryptkey = pm.environment.get('encryptkey')
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console.log('jsonstr ' + jsonstr)
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//测试
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let ciphertext = aesEncrypt(jsonstr, CryptoJS.enc.Utf8.parse(cryptkey), CryptoJS.enc.Utf8.parse(iv));//加密
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console.log('iv ' + iv)
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console.log('ciphertext ' + ciphertext)
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let checkdata = CryptoJS.HmacSHA256(jsonstr, cryptkey);
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console.log('HmacSHA256checkdata ' + checkdata)
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checkdata = CryptoJS.enc.Base64.stringify(checkdata)
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console.log('Base64checkdata ' + checkdata)
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let encstr = btoa(iv + atob(checkdata) + atob(ciphertext))
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console.log('[BASE64]btoa结果:', encstr)
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encstr = encstr.replace(/\//g, '_a')
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encstr = encstr.replace(/\+/g, '_b')
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encstr = encstr.replace(/\=/g, '_c')
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console.log('[BASE64]加密前:', encstr)
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if (pm.environment.get("authcode_encrypt") == 1) {
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encstr = authcode(encstr, 1)
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console.log('[BASE64]authcode:', encstr)
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}
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if (pm.environment.get("interrupt_encrypt") == 1) {
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encstr = addinterruptchars(encstr)
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console.log('[BASE64]interupt:', encstr)
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}
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pm.environment.set("params", encstr)
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console.log('[BASE64]加密后:', encstr)
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// let requestCfg = {
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// url: pm.environment.get('host') + '/index/instagram/base64encrypt',
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// method: 'POST',
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// body: {
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// mode: 'urlencoded',
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// urlencoded: [
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// {
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// key: 'encstr',
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// value: ciphertext,
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// disabled: false
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// },
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// {
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// key: 'checkdata',
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// value: checkdata,
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// disabled: false
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// },
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// {
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// key: 'iv',
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// value: iv,
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// disabled: false
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// },
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// ]
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// }
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// }
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// pm.sendRequest(requestCfg, function (err, response) {
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// try {
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// console.log('base64encrypt', response.json())
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// encstr = response.json()['msg']
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// console.log('[BASE64]加密前:', encstr)
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// if (pm.environment.get("authcode_encrypt") == 1) {
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// encstr = authcode(encstr, 1);
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// console.log('[BASE64]authcode:', encstr)
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// }
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// if (pm.environment.get("interrupt_encrypt") == 1) {
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// encstr = addinterruptchars(encstr)
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// console.log('[BASE64]interupt:', encstr)
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// }
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// pm.environment.set("params", encstr);
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// console.log('[BASE64]加密后:', encstr)
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// } catch (e) {
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// console.error(e.message, e)
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// console.log('[BASE64]response:', response.text())
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// }
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// })
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}
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