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JavaScript generic ASN.1 parser (mirror)
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205// ASN.1 JavaScript decoder// Copyright (c) 2008-2018 Lapo Luchini <lapo@lapo.it>
// 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.
(function (undefined) {"use strict";
var ASN1 = (typeof module !== 'undefined') ? require('./asn1.js') : window.ASN1, oids = (typeof module !== 'undefined') ? require('./oids.js') : window.oids, lineLength = 80, contentLength = 8 * lineLength, DOM = { ellipsis: "\u2026", tag: function (tagName, className) { var t = document.createElement(tagName); t.className = className; return t; }, text: function (str) { return document.createTextNode(str); }, space: function () { var t = document.createElement('span'); t.className = 'spaces'; t.innerHTML = ' '; return t; }, breakLines: function (str, length) { var lines = str.split(/\r?\n/), o = ''; for (var i = 0; i < lines.length; ++i) { var line = lines[i]; if (i > 0) o += "\n"; while (line.length > length) { o += line.substring(0, length); o += "\n"; line = line.substring(length); } o += line; } return o; } };
ASN1.prototype.toDOM = function (spaces) { spaces = spaces || ''; var isOID = (typeof oids === 'object') && (this.tag.isUniversal() && (this.tag.tagNumber == 0x06)); var node = DOM.tag("div", "node"); node.asn1 = this; var head = DOM.tag("div", "head"); head.innerHTML = "<span class='spaces'>" + spaces + "</span>" + this.typeName().replace(/_/g, " "); var content = this.content(contentLength); if (content !== null) { var preview = DOM.tag("span", "preview"), shortContent; if (isOID) content = content.split('\n', 1)[0]; shortContent = (content.length > lineLength) ? content.substring(0, lineLength) + DOM.ellipsis : content; preview.appendChild(DOM.space()); preview.appendChild(DOM.text(shortContent)); if (isOID) { var oid = oids[content]; if (oid) { if (oid.d) { preview.appendChild(DOM.space()); var oidd = DOM.tag("span", "oid description"); oidd.appendChild(DOM.text(oid.d)); preview.appendChild(oidd); } if (oid.c) { preview.appendChild(DOM.space()); var oidc = DOM.tag("span", "oid comment"); oidc.appendChild(DOM.text("(" + oid.c + ")")); preview.appendChild(oidc); } } } head.appendChild(preview); content = DOM.breakLines(content, lineLength); content = content.replace(/</g, "<"); content = content.replace(/\n/g, "<br>"); } node.appendChild(head); this.node = node; this.head = head; var value = DOM.tag("div", "value"); var s = "Offset: " + this.stream.pos + "<br>"; s += "Length: " + this.header + "+"; if (this.length >= 0) s += this.length; else s += (-this.length) + " (undefined)"; if (this.tag.tagConstructed) s += "<br>(constructed)"; else if ((this.tag.isUniversal() && ((this.tag.tagNumber == 0x03) || (this.tag.tagNumber == 0x04))) && (this.sub !== null)) s += "<br>(encapsulates)"; //TODO if (this.tag.isUniversal() && this.tag.tagNumber == 0x03) s += "Unused bits: " if (content !== null) { s += "<br>Value:<br><b>" + content + "</b>"; if (isOID && oid) { if (oid.d) s += "<br>" + oid.d; if (oid.c) s += "<br>" + oid.c; if (oid.w) s += "<br>(warning!)"; } } value.innerHTML = s; node.appendChild(value); var sub = DOM.tag("div", "sub"); if (this.sub !== null) { spaces += '\xA0 '; for (var i = 0, max = this.sub.length; i < max; ++i) sub.appendChild(this.sub[i].toDOM(spaces)); } node.appendChild(sub); head.onclick = function () { node.className = (node.className == "node collapsed") ? "node" : "node collapsed"; }; return node;};ASN1.prototype.fakeHover = function (current) { this.node.className += " hover"; if (current) this.head.className += " hover";};ASN1.prototype.fakeOut = function (current) { var re = / ?hover/; this.node.className = this.node.className.replace(re, ""); if (current) this.head.className = this.head.className.replace(re, "");};ASN1.prototype.toHexDOM_sub = function (node, className, stream, start, end) { if (start >= end) return; var sub = DOM.tag("span", className); sub.appendChild(DOM.text( stream.hexDump(start, end))); node.appendChild(sub);};ASN1.prototype.toHexDOM = function (root) { var node = DOM.tag("span", "hex"); if (root === undefined) root = node; this.head.hexNode = node; this.head.onmouseover = function () { this.hexNode.className = "hexCurrent"; }; this.head.onmouseout = function () { this.hexNode.className = "hex"; }; node.asn1 = this; node.onmouseover = function () { var current = !root.selected; if (current) { root.selected = this.asn1; this.className = "hexCurrent"; } this.asn1.fakeHover(current); }; node.onmouseout = function () { var current = (root.selected == this.asn1); this.asn1.fakeOut(current); if (current) { root.selected = null; this.className = "hex"; } }; this.toHexDOM_sub(node, "tag", this.stream, this.posStart(), this.posLen()); this.toHexDOM_sub(node, (this.length >= 0) ? "dlen" : "ulen", this.stream, this.posLen(), this.posContent()); if (this.sub === null) { var start = this.posContent(); var end = this.posEnd(); if (end - start < 10 * 16) node.appendChild(DOM.text( this.stream.hexDump(start, end))); else { var end1 = start + 5 * 16 - (start & 0xF); var start2 = end - 16 - (end & 0xF); node.appendChild(DOM.text( this.stream.hexDump(start, end1))); var sub = DOM.tag("span", "skip"); sub.appendChild(DOM.text("\u2026 skipping " + (start2 - end1) + " bytes \u2026\n")); node.appendChild(sub); node.appendChild(DOM.text( this.stream.hexDump(start2, end))); } } else if (this.sub.length > 0) { var first = this.sub[0]; var last = this.sub[this.sub.length - 1]; this.toHexDOM_sub(node, "intro", this.stream, this.posContent(), first.posStart()); for (var i = 0, max = this.sub.length; i < max; ++i) node.appendChild(this.sub[i].toHexDOM(root)); this.toHexDOM_sub(node, "outro", this.stream, last.posEnd(), this.posEnd()); } else this.toHexDOM_sub(node, "outro", this.stream, this.posContent(), this.posEnd()); return node;};
})();