中国观鸟记录中心 birdreport 爬虫逆向加密 AES解密分析和代码 2023版
目录
1 基本分析3步走
请求头中需要破解Requestid 以及 Sign
载荷的Form表单是一个加密字符串
相应的数据是一个加密数据需要破解
2 加密逻辑分析
2.1 分析timestamp requestId sign
2.2 分析表单加密参数
3 解密相应数据
4 完整代码
1 基本分析3步走
请求头中需要破解Requestid 以及 Sign
载荷的Form表单是一个加密字符串
相应的数据是一个加密数据需要破解
2 加密逻辑分析
2.1 分析timestamp requestId sign
我们可以通过XHR断点调试，经过分析可以定位到在魔改后的Jquery.js里面 在k.beforeSend 是调用了加密逻辑
我们进入beforeSend函数
在beforeSend 函数里面我们看到最下面设置了头部的三个参数timestamp requestId sign
a.setRequestHeader("timestamp", c);
a.setRequestHeader('requestId', d);
a.setRequestHeader('sign', f)
在往上看
var c = Date.parse(new Date()); //是个时间戳
var d = getUuid(); //getUuid 是一个函数返回一个Uuid可以固定
var e = JSON.stringify(sort_ASCII(dataTojson(b.data || '{}'))) //b.data进行处理我们可以看下b.data和e 此处的b.data 会根据搜索条件的不同会略有区别
我们的sign即我们的f 是一个MD5加密(e + d + c)
var f = MD5(e + d + c);
这个MD5函数可以在jqueryAjax.js直接扣到
2.2 分析表单加密参数
接下来分析表单加密数据
可以看到此处调用了一个加密方法encrypt.encryptUnicodeLong(e);
我们进入对应的函数文件只要扣对应的标注函数即可，标注函数前面的代码没用主要用来环境检测
我们可以把这个函数自己命名下比如我这里命名为forever，此外我们需要补环境window 和 navigator
由于代码太长，请看最终的完整代码
执行结果，这样我们就获取到了需要发送的加密form表单数据
3 解密相应数据
返回的数据我们还是可以通过XHR断点方式定位到
这里调用了a.parseData
进入a.parseData方法可以看到又调用了BIRDREPORT_APIJS.decode，并且传入了返回的加密数据
进入加密方法 可以看到这个是AES加密
在js文件的头部可以看到key iv是固定的
我们可以封装解密函数
4 完整代码
最后完整的代码包含加密解密 以及axios发送请求
JSEncrypt = require('jsencrypt')
axios = require('axios')
var CryptoJS = require('crypto-js')
window = global
navigator = {
appName: 'Netscape'
}
function forever () {
'use strict';
var BI_RM = "0123456789abcdefghijklmnopqrstuvwxyz";
function int2char(n) {
return BI_RM.charAt(n);
}
//#region BIT_OPERATIONS
// (public) this & a
function op_and(x, y) {
return x & y;
}
// (public) this | a
function op_or(x, y) {
return x | y;
}
// (public) this ^ a
function op_xor(x, y) {
return x ^ y;
}
// (public) this & ~a
function op_andnot(x, y) {
return x & ~y;
}
// return index of lowest 1-bit in x, x < 2^31
function lbit(x) {
if (x == 0) {
return -1;
}
var r = 0;
if ((x & 0xffff) == 0) {
x >>= 16;
r += 16;
}
if ((x & 0xff) == 0) {
x >>= 8;
r += 8;
}
if ((x & 0xf) == 0) {
x >>= 4;
r += 4;
}
if ((x & 3) == 0) {
x >>= 2;
r += 2;
}
if ((x & 1) == 0) {
++r;
}
return r;
}
// return number of 1 bits in x
function cbit(x) {
var r = 0;
while (x != 0) {
x &= x - 1;
++r;
}
return r;
}
//#endregion BIT_OPERATIONS
var b64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var b64pad = "=";
function hex2b64(h) {
var i;
var c;
var ret = "";
for (i = 0; i + 3 <= h.length; i += 3) {
c = parseInt(h.substring(i, i + 3), 16);
ret += b64map.charAt(c >> 6) + b64map.charAt(c & 63);
}
if (i + 1 == h.length) {
c = parseInt(h.substring(i, i + 1), 16);
ret += b64map.charAt(c << 2);
}
else if (i + 2 == h.length) {
c = parseInt(h.substring(i, i + 2), 16);
ret += b64map.charAt(c >> 2) + b64map.charAt((c & 3) << 4);
}
while ((ret.length & 3) > 0) {
ret += b64pad;
}
return ret;
}
// convert a base64 string to hex
function b64tohex(s) {
var ret = "";
var i;
var k = 0; // b64 state, 0-3
var slop = 0;
for (i = 0; i < s.length; ++i) {
if (s.charAt(i) == b64pad) {
break;
}
var v = b64map.indexOf(s.charAt(i));
if (v < 0) {
continue;
}
if (k == 0) {
ret += int2char(v >> 2);
slop = v & 3;
k = 1;
}
else if (k == 1) {
ret += int2char((slop << 2) | (v >> 4));
slop = v & 0xf;
k = 2;
}
else if (k == 2) {
ret += int2char(slop);
ret += int2char(v >> 2);
slop = v & 3;
k = 3;
}
else {
ret += int2char((slop << 2) | (v >> 4));
ret += int2char(v & 0xf);
k = 0;
}
}
if (k == 1) {
ret += int2char(slop << 2);
}
return ret;
}
/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0
THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.
See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
/* global Reflect, Promise */
var extendStatics = Object.setPrototypeOf ||
({__proto__: []} instanceof Array && function (d, b) {
d.__proto__ = b;
}) ||
function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
};
function __extends(d, b) {
extendStatics(d, b);
function __() {
this.constructor = d;
}
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
}
// Hex JavaScript decoder
// Copyright (c) 2008-2013 Lapo Luchini
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
/*jshint browser: true, strict: true, immed: true, latedef: true, undef: true, regexdash: false */
var decoder;
var Hex = {
decode: function (a) {
var i;
if (decoder === undefined) {
var hex = "0123456789ABCDEF";
var ignore = " \f\n\r\t\u00A0\u2028\u2029";
decoder = {};
for (i = 0; i < 16; ++i) {
decoder[hex.charAt(i)] = i;
}
hex = hex.toLowerCase();
for (i = 10; i < 16; ++i) {
decoder[hex.charAt(i)] = i;
}
for (i = 0; i < ignore.length; ++i) {
decoder[ignore.charAt(i)] = -1;
}
}
var out = [];
var bits = 0;
var char_count = 0;
for (i = 0; i < a.length; ++i) {
var c = a.charAt(i);
if (c == "=") {
break;
}
c = decoder[c];
if (c == -1) {
continue;
}
if (c === undefined) {
throw new Error("Illegal character at offset " + i);
}
bits |= c;
if (++char_count >= 2) {
out[out.length] = bits;
bits = 0;
char_count = 0;
}
else {
bits <<= 4;
}
}
if (char_count) {
throw new Error("Hex encoding incomplete: 4 bits missing");
}
return out;
}
};
// Base64 JavaScript decoder
// Copyright (c) 2008-2013 Lapo Luchini
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
/*jshint browser: true, strict: true, immed: true, latedef: true, undef: true, regexdash: false */
var decoder$1;
var Base64 = {
decode: function (a) {
var i;
if (decoder$1 === undefined) {
var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var ignore = "= \f\n\r\t\u00A0\u2028\u2029";
decoder$1 = Object.create(null);
for (i = 0; i < 64; ++i) {
decoder$1[b64.charAt(i)] = i;
}
for (i = 0; i < ignore.length; ++i) {
decoder$1[ignore.charAt(i)] = -1;
}
}
var out = [];
var bits = 0;
var char_count = 0;
for (i = 0; i < a.length; ++i) {
var c = a.charAt(i);
if (c == "=") {
break;
}
c = decoder$1[c];
if (c == -1) {
continue;
}
if (c === undefined) {
throw new Error("Illegal character at offset " + i);
}
bits |= c;
if (++char_count >= 4) {
out[out.length] = (bits >> 16);
out[out.length] = (bits >> 8) & 0xFF;
out[out.length] = bits & 0xFF;
bits = 0;
char_count = 0;
}
else {
bits <<= 6;
}
}
switch (char_count) {
case 1:
throw new Error("Base64 encoding incomplete: at least 2 bits missing");
case 2:
out[out.length] = (bits >> 10);
break;
case 3:
out[out.length] = (bits >> 16);
out[out.length] = (bits >> 8) & 0xFF;
break;
}
return out;
},
re: /-----BEGIN [^-]+-----([A-Za-z0-9+\/=\s]+)-----END [^-]+-----|begin-base64[^\n]+\n([A-Za-z0-9+\/=\s]+)====/,
unarmor: function (a) {
var m = Base64.re.exec(a);
if (m) {
if (m[1]) {
a = m[1];
}
else if (m[2]) {
a = m[2];
}
else {
throw new Error("RegExp out of sync");
}
}
return Base64.decode(a);
}
};
// Big integer base-10 printing library
// Copyright (c) 2014 Lapo Luchini
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
/*jshint browser: true, strict: true, immed: true, latedef: true, undef: true, regexdash: false */
var max = 10000000000000; // biggest integer that can still fit 2^53 when multiplied by 256
var Int10 = /** @class */ (function () {
function Int10(value) {
this.buf = [+value || 0];
}
Int10.prototype.mulAdd = function (m, c) {
// assert(m <= 256)
var b = this.buf;
var l = b.length;
var i;
var t;
for (i = 0; i < l; ++i) {
t = b[i] * m + c;
if (t < max) {
c = 0;
}
else {
c = 0 | (t / max);
t -= c * max;
}
b[i] = t;
}
if (c > 0) {
b[i] = c;
}
};
Int10.prototype.sub = function (c) {
// assert(m <= 256)
var b = this.buf;
var l = b.length;
var i;
var t;
for (i = 0; i < l; ++i) {
t = b[i] - c;
if (t < 0) {
t += max;
c = 1;
}
else {
c = 0;
}
b[i] = t;
}
while (b[b.length - 1] === 0) {
b.pop();
}
};
Int10.prototype.toString = function (base) {
if ((base || 10) != 10) {
throw new Error("only base 10 is supported");
}
var b = this.buf;
var s = b[b.length - 1].toString();
for (var i = b.length - 2; i >= 0; --i) {
s += (max + b[i]).toString().substring(1);
}
return s;
};
Int10.prototype.valueOf = function () {
var b = this.buf;
var v = 0;
for (var i = b.length - 1; i >= 0; --i) {
v = v * max + b[i];
}
return v;
};
Int10.prototype.simplify = function () {
var b = this.buf;
return (b.length == 1) ? b[0] : this;
};
return Int10;
}());
// ASN.1 JavaScript decoder
var ellipsis = "\u2026";
var reTimeS = /^(\d\d)(0[1-9]|1[0-2])(0[1-9]|[12]\d|3[01])([01]\d|2[0-3])(?:([0-5]\d)(?:([0-5]\d)(?:[.,](\d{1,3}))?)?)?(Z|[-+](?:[0]\d|1[0-2])([0-5]\d)?)?$/;
var reTimeL = /^(\d\d\d\d)(0[1-9]|1[0-2])(0[1-9]|[12]\d|3[01])([01]\d|2[0-3])(?:([0-5]\d)(?:([0-5]\d)(?:[.,](\d{1,3}))?)?)?(Z|[-+](?:[0]\d|1[0-2])([0-5]\d)?)?$/;
function stringCut(str, len) {
if (str.length > len) {
str = str.substring(0, len) + ellipsis;
}
return str;
}
var Stream = /** @class */ (function () {
function Stream(enc, pos) {
this.hexDigits = "0123456789ABCDEF";
if (enc instanceof Stream) {
this.enc = enc.enc;
this.pos = enc.pos;
}
else {
// enc should be an array or a binary string
this.enc = enc;
this.pos = pos;
}
}
Stream.prototype.get = function (pos) {
if (pos === undefined) {
pos = this.pos++;
}
if (pos >= this.enc.length) {
throw new Error("Requesting byte offset " + pos + " on a stream of length " + this.enc.length);
}
return ("string" === typeof this.enc) ? this.enc.charCodeAt(pos) : this.enc[pos];
};
Stream.prototype.hexByte = function (b) {
return this.hexDigits.charAt((b >> 4) & 0xF) + this.hexDigits.charAt(b & 0xF);
};
Stream.prototype.hexDump = function (start, end, raw) {
var s = "";
for (var i = start; i < end; ++i) {
s += this.hexByte(this.get(i));
if (raw !== true) {
switch (i & 0xF) {
case 0x7:
s += " ";
break;
case 0xF:
s += "\n";
break;
default:
s += " ";
}
}
}
return s;
};
Stream.prototype.isASCII = function (start, end) {
for (var i = start; i < end; ++i) {
var c = this.get(i);
if (c < 32 || c > 176) {
return false;
}
}
return true;
};
Stream.prototype.parseStringISO = function (start, end) {
var s = "";
for (var i = start; i < end; ++i) {
s += String.fromCharCode(this.get(i));
}
return s;
};
Stream.prototype.parseStringUTF = function (start, end) {
var s = "";
for (var i = start; i < end;) {
var c = this.get(i++);
if (c < 128) {
s += String.fromCharCode(c);
}
else if ((c > 191) && (c < 224)) {
s += String.fromCharCode(((c & 0x1F) << 6) | (this.get(i++) & 0x3F));
}
else {
s += String.fromCharCode(((c & 0x0F) << 12) | ((this.get(i++) & 0x3F) << 6) | (this.get(i++) & 0x3F));
}
}
return s;
};
Stream.prototype.parseStringBMP = function (start, end) {
var str = "";
var hi;
var lo;
for (var i = start; i < end;) {
hi = this.get(i++);
lo = this.get(i++);
str += String.fromCharCode((hi << 8) | lo);
}
return str;
};
Stream.prototype.parseTime = function (start, end, shortYear) {
var s = this.parseStringISO(start, end);
var m = (shortYear ? reTimeS : reTimeL).exec(s);
if (!m) {
return "Unrecognized time: " + s;
}
if (shortYear) {
// to avoid querying the timer, use the fixed range [1970, 2069]
// it will conform with ITU X.400 [-10, +40] sliding window until 2030
m[1] = +m[1];
m[1] += (+m[1] < 70) ? 2000 : 1900;
}
s = m[1] + "-" + m[2] + "-" + m[3] + " " + m[4];
if (m[5]) {
s += ":" + m[5];
if (m[6]) {
s += ":" + m[6];
if (m[7]) {
s += "." + m[7];
}
}
}
if (m[8]) {
s += " UTC";
if (m[8] != "Z") {
s += m[8];
if (m[9]) {
s += ":" + m[9];
}
}
}
return s;
};
Stream.prototype.parseInteger = function (start, end) {
var v = this.get(start);
var neg = (v > 127);
var pad = neg ? 255 : 0;
var len;
var s = "";
// skip unuseful bits (not allowed in DER)
while (v == pad && ++start < end) {
v = this.get(start);
}
len = end - start;
if (len === 0) {
return neg ? -1 : 0;
}
// show bit length of huge integers
if (len > 4) {
s = v;
len <<= 3;
while (((+s ^ pad) & 0x80) == 0) {
s = +s << 1;
--len;
}
s = "(" + len + " bit)\n";
}
// decode the integer
if (neg) {
v = v - 256;
}
var n = new Int10(v);
for (var i = start + 1; i < end; ++i) {
n.mulAdd(256, this.get(i));
}
return s + n.toString();
};
Stream.prototype.parseBitString = function (start, end, maxLength) {
var unusedBit = this.get(start);
var lenBit = ((end - start - 1) << 3) - unusedBit;
var intro = "(" + lenBit + " bit)\n";
var s = "";
for (var i = start + 1; i < end; ++i) {
var b = this.get(i);
var skip = (i == end - 1) ? unusedBit : 0;
for (var j = 7; j >= skip; --j) {
s += (b >> j) & 1 ? "1" : "0";
}
if (s.length > maxLength) {
return intro + stringCut(s, maxLength);
}
}
return intro + s;
};
Stream.prototype.parseOctetString = function (start, end, maxLength) {
if (this.isASCII(start, end)) {
return stringCut(this.parseStringISO(start, end), maxLength);
}
var len = end - start;
var s = "(" + len + " byte)\n";
maxLength /= 2; // we work in bytes
if (len > maxLength) {
end = start + maxLength;
}
for (var i = start; i < end; ++i) {
s += this.hexByte(this.get(i));
}
if (len > maxLength) {
s += ellipsis;
}
return s;
};
Stream.prototype.parseOID = function (start, end, maxLength) {
var s = "";
var n = new Int10();
var bits = 0;
for (var i = start; i < end; ++i) {
var v = this.get(i);
n.mulAdd(128, v & 0x7F);
bits += 7;
if (!(v & 0x80)) {
if (s === "") {
n = n.simplify();
if (n instanceof Int10) {
n.sub(80);
s = "2." + n.toString();
}
else {
var m = n < 80 ? n < 40 ? 0 : 1 : 2;
s = m + "." + (n - m * 40);
}
}
else {
s += "." + n.toString();
}
if (s.length > maxLength) {
return stringCut(s, maxLength);
}
n = new Int10();
bits = 0;
}
}
if (bits > 0) {
s += ".incomplete";
}
return s;
};
return Stream;
}());
var ASN1 = /** @class */ (function () {
function ASN1(stream, header, length, tag, sub) {
if (!(tag instanceof ASN1Tag)) {
throw new Error("Invalid tag value.");
}
this.stream = stream;
this.header = header;
this.length = length;
this.tag = tag;
this.sub = sub;
}
ASN1.prototype.typeName = function () {
switch (this.tag.tagClass) {
case 0:// universal
switch (this.tag.tagNumber) {
case 0x00:
return "EOC";
case 0x01:
return "BOOLEAN";
case 0x02:
return "INTEGER";
case 0x03:
return "BIT_STRING";
case 0x04:
return "OCTET_STRING";
case 0x05:
return "NULL";
case 0x06:
return "OBJECT_IDENTIFIER";
case 0x07:
return "ObjectDescriptor";
case 0x08:
return "EXTERNAL";
case 0x09:
return "REAL";
case 0x0A:
return "ENUMERATED";
case 0x0B:
return "EMBEDDED_PDV";
case 0x0C:
return "UTF8String";
case 0x10:
return "SEQUENCE";
case 0x11:
return "SET";
case 0x12:
return "NumericString";
case 0x13:
return "PrintableString"; // ASCII subset
case 0x14:
return "TeletexString"; // aka T61String
case 0x15:
return "VideotexString";
case 0x16:
return "IA5String"; // ASCII
case 0x17:
return "UTCTime";
case 0x18:
return "GeneralizedTime";
case 0x19:
return "GraphicString";
case 0x1A:
return "VisibleString"; // ASCII subset
case 0x1B:
return "GeneralString";
case 0x1C:
return "UniversalString";
case 0x1E:
return "BMPString";
}
return "Universal_" + this.tag.tagNumber.toString();
case 1:
return "Application_" + this.tag.tagNumber.toString();
case 2:
return "[" + this.tag.tagNumber.toString() + "]"; // Context
case 3:
return "Private_" + this.tag.tagNumber.toString();
}
};
ASN1.prototype.content = function (maxLength) {
if (this.tag === undefined) {
return null;
}
if (maxLength === undefined) {
maxLength = Infinity;
}
var content = this.posContent();
var len = Math.abs(this.length);
if (!this.tag.isUniversal()) {
if (this.sub !== null) {
return "(" + this.sub.length + " elem)";
}
return this.stream.parseOctetString(content, content + len, maxLength);
}
switch (this.tag.tagNumber) {
case 0x01:// BOOLEAN
return (this.stream.get(content) === 0) ? "false" : "true";
case 0x02:// INTEGER
return this.stream.parseInteger(content, content + len);
case 0x03:// BIT_STRING
return this.sub ? "(" + this.sub.length + " elem)" :
this.stream.parseBitString(content, content + len, maxLength);
case 0x04:// OCTET_STRING
return this.sub ? "(" + this.sub.length + " elem)" :
this.stream.parseOctetString(content, content + len, maxLength);
// case 0x05: // NULL
case 0x06:// OBJECT_IDENTIFIER
return this.stream.parseOID(content, content + len, maxLength);
// case 0x07: // ObjectDescriptor
// case 0x08: // EXTERNAL
// case 0x09: // REAL
// case 0x0A: // ENUMERATED
// case 0x0B: // EMBEDDED_PDV
case 0x10: // SEQUENCE
case 0x11:// SET
if (this.sub !== null) {
return "(" + this.sub.length + " elem)";
}
else {
return "(no elem)";
}
case 0x0C:// UTF8String
return stringCut(this.stream.parseStringUTF(content, content + len), maxLength);
case 0x12: // NumericString
case 0x13: // PrintableString
case 0x14: // TeletexString
case 0x15: // VideotexString
case 0x16: // IA5String
// case 0x19: // GraphicString
case 0x1A:// VisibleString
// case 0x1B: // GeneralString
// case 0x1C: // UniversalString
return stringCut(this.stream.parseStringISO(content, content + len), maxLength);
case 0x1E:// BMPString
return stringCut(this.stream.parseStringBMP(content, content + len), maxLength);
case 0x17: // UTCTime
case 0x18:// GeneralizedTime
return this.stream.parseTime(content, content + len, (this.tag.tagNumber == 0x17));
}
return null;
};
ASN1.prototype.toString = function () {
return this.typeName() + "@" + this.stream.pos + "[header:" + this.header + ",length:" + this.length + ",sub:" + ((this.sub === null) ? "null" : this.sub.length) + "]";
};
ASN1.prototype.toPrettyString = function (indent) {
if (indent === undefined) {
indent = "";
}
var s = indent + this.typeName() + " @" + this.stream.pos;
if (this.length >= 0) {
s += "+";
}
s += this.length;
if (this.tag.tagConstructed) {
s += " (constructed)";
}
else if ((this.tag.isUniversal() && ((this.tag.tagNumber == 0x03) || (this.tag.tagNumber == 0x04))) && (this.sub !== null)) {
s += " (encapsulates)";
}
s += "\n";
if (this.sub !== null) {
indent += " ";
for (var i = 0, max = this.sub.length; i < max; ++i) {
s += this.sub[i].toPrettyString(indent);
}
}
return s;
};
ASN1.prototype.posStart = function () {
return this.stream.pos;
};
ASN1.prototype.posContent = function () {
return this.stream.pos + this.header;
};
ASN1.prototype.posEnd = function () {
return this.stream.pos + this.header + Math.abs(this.length);
};
ASN1.prototype.toHexString = function () {
return this.stream.hexDump(this.posStart(), this.posEnd(), true);
};
ASN1.decodeLength = function (stream) {
var buf = stream.get();
var len = buf & 0x7F;
if (len == buf) {
return len;
}
// no reason to use Int10, as it would be a huge buffer anyways
if (len > 6) {
throw new Error("Length over 48 bits not supported at position " + (stream.pos - 1));
}
if (len === 0) {
return null;
} // undefined
buf = 0;
for (var i = 0; i < len; ++i) {
buf = (buf * 256) + stream.get();
}
return buf;
};
/**
* Retrieve the hexadecimal value (as a string) of the current ASN.1 element
* @returns {string}
* @public
*/
ASN1.prototype.getHexStringValue = function () {
var hexString = this.toHexString();
var offset = this.header * 2;
var length = this.length * 2;
return hexString.substr(offset, length);
};
ASN1.decode = function (str) {
var stream;
if (!(str instanceof Stream)) {
stream = new Stream(str, 0);
}
else {
stream = str;
}
var streamStart = new Stream(stream);
var tag = new ASN1Tag(stream);
var len = ASN1.decodeLength(stream);
var start = stream.pos;
var header = start - streamStart.pos;
var sub = null;
var getSub = function () {
var ret = [];
if (len !== null) {
// definite length
var end = start + len;
while (stream.pos < end) {
ret[ret.length] = ASN1.decode(stream);
}
if (stream.pos != end) {
throw new Error("Content size is not correct for container starting at offset " + start);
}
}
else {
// undefined length
try {
for (; ;) {
var s = ASN1.decode(stream);
if (s.tag.isEOC()) {
break;
}
ret[ret.length] = s;
}
len = start - stream.pos; // undefined lengths are represented as negative values
}
catch (e) {
throw new Error("Exception while decoding undefined length content: " + e);
}
}
return ret;
};
if (tag.tagConstructed) {
// must have valid content
sub = getSub();
}
else if (tag.isUniversal() && ((tag.tagNumber == 0x03) || (tag.tagNumber == 0x04))) {
// sometimes BitString and OctetString are used to encapsulate ASN.1
try {
if (tag.tagNumber == 0x03) {
if (stream.get() != 0) {
throw new Error("BIT STRINGs with unused bits cannot encapsulate.");
}
}
sub = getSub();
for (var i = 0; i < sub.length; ++i) {
if (sub[i].tag.isEOC()) {
throw new Error("EOC is not supposed to be actual content.");
}
}
}
catch (e) {
// but silently ignore when they don't
sub = null;
}
}
if (sub === null) {
if (len === null) {
throw new Error("We can't skip over an invalid tag with undefined length at offset " + start);
}
stream.pos = start + Math.abs(len);
}
return new ASN1(streamStart, header, len, tag, sub);
};
return ASN1;
}());
var ASN1Tag = /** @class */ (function () {
function ASN1Tag(stream) {
var buf = stream.get();
this.tagClass = buf >> 6;
this.tagConstructed = ((buf & 0x20) !== 0);
this.tagNumber = buf & 0x1F;
if (this.tagNumber == 0x1F) {
var n = new Int10();
do {
buf = stream.get();
n.mulAdd(128, buf & 0x7F);
} while (buf & 0x80);
this.tagNumber = n.simplify();
}
}
ASN1Tag.prototype.isUniversal = function () {
return this.tagClass === 0x00;
};
ASN1Tag.prototype.isEOC = function () {
return this.tagClass === 0x00 && this.tagNumber === 0x00;
};
return ASN1Tag;
}());
// Copyright (c) 2005 Tom Wu
// Bits per digit
var dbits;
// JavaScript engine analysis
var canary = 0xdeadbeefcafe;
var j_lm = ((canary & 0xffffff) == 0xefcafe);
//#region
var lowprimes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997];
var lplim = (1 << 26) / lowprimes[lowprimes.length - 1];
//#endregion
// (public) Constructor
var BigInteger = /** @class */ (function () {
function BigInteger(a, b, c) {
if (a != null) {
if ("number" == typeof a) {
this.fromNumber(a, b, c);
}
else if (b == null && "string" != typeof a) {
this.fromString(a, 256);
}
else {
this.fr