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js-encrypt

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A Javascript library to perform OpenSSL RSA Encryption, Decryption, and Key Generation.

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"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } // ASN.1 JavaScript decoder // Copyright (c) 2008-2013 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. /*jshint browser: true, strict: true, immed: true, latedef: true, undef: true, regexdash: false */ /*global oids */ var hardLimit = 100, ellipsis = "\u2026", DOM = { tag: function tag(tagName, className) { var t = document.createElement(tagName); t.className = className; return t; }, text: function text(str) { return document.createTextNode(str); } }; var Stream = function () { _createClass(Stream, null, [{ key: "hexDigits", get: function get() { return "0123456789ABCDEF"; } }, { key: "reTime", get: function get() { return (/^((?:1[89]|2\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 Stream(enc, pos) { _classCallCheck(this, Stream); if (enc instanceof Stream) { this.enc = enc.enc; this.pos = enc.pos; } else { this.enc = enc; this.pos = pos; } } _createClass(Stream, [{ key: "get", value: function get(pos) { if (pos === undefined) pos = this.pos++; if (pos >= this.enc.length) throw 'Requesting byte offset ' + pos + ' on a stream of length ' + this.enc.length; return this.enc[pos]; } }, { key: "hexByte", value: function hexByte(b) { return Stream.hexDigits.charAt(b >> 4 & 0xF) + Stream.hexDigits.charAt(b & 0xF); } }, { key: "hexDump", value: function hexDump(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; } }, { key: "parseStringISO", value: function parseStringISO(start, end) { var s = ""; for (var i = start; i < end; ++i) { s += String.fromCharCode(this.get(i)); }return s; } }, { key: "parseStringUTF", value: function parseStringUTF(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; } }, { key: "parseStringBMP", value: function parseStringBMP(start, end) { var str = ""; for (var i = start; i < end; i += 2) { var high_byte = this.get(i); var low_byte = this.get(i + 1); str += String.fromCharCode((high_byte << 8) + low_byte); } return str; } }, { key: "parseTime", value: function parseTime(start, end) { var s = this.parseStringISO(start, end), m = Stream.reTime.exec(s); if (!m) return "Unrecognized time: " + s; 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; } }, { key: "parseInteger", value: function parseInteger(start, end) { //TODO support negative numbers var len = end - start; if (len > 4) { len <<= 3; var s = this.get(start); if (s === 0) len -= 8;else while (s < 128) { s <<= 1; --len; } return "(" + len + " bit)"; } var n = 0; for (var i = start; i < end; ++i) { n = n << 8 | this.get(i); }return n; } }, { key: "parseBitString", value: function parseBitString(start, end) { var unusedBit = this.get(start), lenBit = (end - start - 1 << 3) - unusedBit, s = "(" + lenBit + " bit)"; if (lenBit <= 20) { var skip = unusedBit; s += " "; for (var i = end - 1; i > start; --i) { var b = this.get(i); for (var j = skip; j < 8; ++j) { s += b >> j & 1 ? "1" : "0"; }skip = 0; } } return s; } }, { key: "parseOctetString", value: function parseOctetString(start, end) { var len = end - start, s = "(" + len + " byte) "; if (len > hardLimit) end = start + hardLimit; for (var i = start; i < end; ++i) { s += this.hexByte(this.get(i)); } //TODO: also try Latin1? if (len > hardLimit) s += ellipsis; return s; } }, { key: "parseOID", value: function parseOID(start, end) { var s = '', n = 0, bits = 0; for (var i = start; i < end; ++i) { var v = this.get(i); n = n << 7 | v & 0x7F; bits += 7; if (!(v & 0x80)) { // finished if (s === '') { var m = n < 80 ? n < 40 ? 0 : 1 : 2; s = m + "." + (n - m * 40); } else s += "." + (bits >= 31 ? "bigint" : n); n = bits = 0; } } return s; } }]); return Stream; }(); var ASN1 = exports.ASN1 = function () { _createClass(ASN1, null, [{ key: "reSeemsASCII", get: function get() { return (/^[ -~]+$/ ); } }]); function ASN1(stream, header, length, tag, sub) { _classCallCheck(this, ASN1); this.stream = stream; this.header = header; this.length = length; this.tag = tag; this.sub = sub; } _createClass(ASN1, [{ key: "typeName", value: function typeName() { if (this.tag === undefined) return "unknown"; var tagClass = this.tag >> 6, tagConstructed = this.tag >> 5 & 1, tagNumber = this.tag & 0x1F; switch (tagClass) { case 0: // universal switch (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"; default: return "Universal_" + tagNumber.toString(16); } case 1: return "Application_" + tagNumber.toString(16); case 2: return "[" + tagNumber + "]"; // Context case 3: return "Private_" + tagNumber.toString(16); } } }, { key: "content", value: function content() { if (this.tag === undefined) return null; var tagClass = this.tag >> 6, tagNumber = this.tag & 0x1F, content = this.posContent(), len = Math.abs(this.length); if (tagClass !== 0) { // universal if (this.sub !== null) return "(" + this.sub.length + " elem)"; //TODO: TRY TO PARSE ASCII STRING var s = this.stream.parseStringISO(content, content + Math.min(len, hardLimit)); if (ASN1.reSeemsASCII.test(s)) return s.substring(0, 2 * hardLimit) + (s.length > 2 * hardLimit ? ellipsis : "");else return this.stream.parseOctetString(content, content + len); } switch (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); case 0x04: // OCTET_STRING return this.sub ? "(" + this.sub.length + " elem)" : this.stream.parseOctetString(content, content + len); //case 0x05: // NULL case 0x06: // OBJECT_IDENTIFIER return this.stream.parseOID(content, content + len); //case 0x07: // ObjectDescriptor //case 0x08: // EXTERNAL //case 0x09: // REAL //case 0x0A: // ENUMERATED //case 0x0B: // EMBEDDED_PDV case 0x10: // SEQUENCE case 0x11: // SET return "(" + this.sub.length + " elem)"; case 0x0C: // UTF8String return this.stream.parseStringUTF(content, content + len); 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 this.stream.parseStringISO(content, content + len); case 0x1E: // BMPString return this.stream.parseStringBMP(content, content + len); case 0x17: // UTCTime case 0x18: // GeneralizedTime return this.stream.parseTime(content, content + len); } return null; } }, { key: "toString", value: function toString() { return this.typeName() + "@" + this.stream.pos + "[header:" + this.header + ",length:" + this.length + ",sub:" + (this.sub === null ? 'null' : this.sub.length) + "]"; } }, { key: "print", value: function print(indent) { if (indent === undefined) indent = ''; document.writeln(indent + this); if (this.sub !== null) { indent += ' '; for (var i = 0, max = this.sub.length; i < max; ++i) { this.sub[i].print(indent); } } } }, { key: "toPrettyString", value: function toPrettyString(indent) { if (indent === undefined) indent = ''; var s = indent + this.typeName() + " @" + this.stream.pos; if (this.length >= 0) s += "+"; s += this.length; if (this.tag & 0x20) s += " (constructed)";else if ((this.tag == 0x03 || this.tag == 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; } }, { key: "toDOM", value: function toDOM() { var node = DOM.tag("div", "node"); node.asn1 = this; var head = DOM.tag("div", "head"); var s = this.typeName().replace(/_/g, " "); head.innerHTML = s; var content = this.content(); if (content !== null) { content = String(content).replace(/</g, "&lt;"); var preview = DOM.tag("span", "preview"); preview.appendChild(DOM.text(content)); head.appendChild(preview); } node.appendChild(head); this.node = node; this.head = head; var value = DOM.tag("div", "value"); 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 & 0x20) s += "<br/>(constructed)";else if ((this.tag == 0x03 || this.tag == 0x04) && this.sub !== null) s += "<br/>(encapsulates)"; //TODO if (this.tag == 0x03) s += "Unused bits: " if (content !== null) { s += "<br/>Value:<br/><b>" + content + "</b>"; if ((typeof oids === "undefined" ? "undefined" : _typeof(oids)) === 'object' && this.tag == 0x06) { var oid = oids[content]; if (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) { for (var i = 0, max = this.sub.length; i < max; ++i) { sub.appendChild(this.sub[i].toDOM()); } } node.appendChild(sub); head.onclick = function () { node.className = node.className == "node collapsed" ? "node" : "node collapsed"; }; return node; } }, { key: "posStart", value: function posStart() { return this.stream.pos; } }, { key: "posContent", value: function posContent() { return this.stream.pos + this.header; } }, { key: "posEnd", value: function posEnd() { return this.stream.pos + this.header + Math.abs(this.length); } }, { key: "fakeHover", value: function fakeHover(current) { this.node.className += " hover"; if (current) this.head.className += " hover"; } }, { key: "fakeOut", value: function fakeOut(current) { var re = / ?hover/; this.node.className = this.node.className.replace(re, ""); if (current) this.head.className = this.head.className.replace(re, ""); } }, { key: "toHexDOM_sub", value: function toHexDOM_sub(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); } }, { key: "toHexDOM", value: function toHexDOM(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.posStart() + 1); this.toHexDOM_sub(node, this.length >= 0 ? "dlen" : "ulen", this.stream, this.posStart() + 1, this.posContent()); if (this.sub === null) node.appendChild(DOM.text(this.stream.hexDump(this.posContent(), this.posEnd())));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()); } return node; } }, { key: "toHexString", value: function toHexString(root) { return this.stream.hexDump(this.posStart(), this.posEnd(), true); } }]); return ASN1; }(); ASN1.decodeLength = function (stream) { var buf = stream.get(), len = buf & 0x7F; if (len == buf) return len; if (len > 3) throw "Length over 24 bits not supported at position " + (stream.pos - 1); if (len === 0) return -1; // undefined buf = 0; for (var i = 0; i < len; ++i) { buf = buf << 8 | stream.get(); }return buf; }; ASN1.hasContent = function (tag, len, stream) { if (tag & 0x20) // constructed return true; if (tag < 0x03 || tag > 0x04) return false; var p = new Stream(stream); if (tag == 0x03) p.get(); // BitString unused bits, must be in [0, 7] var subTag = p.get(); if (subTag >> 6 & 0x01) // not (universal or context) return false; try { var subLength = ASN1.decodeLength(p); return p.pos - stream.pos + subLength == len; } catch (exception) { return false; } }; ASN1.decode = function (stream) { if (!(stream instanceof Stream)) stream = new Stream(stream, 0); var streamStart = new Stream(stream), tag = stream.get(), len = ASN1.decodeLength(stream), header = stream.pos - streamStart.pos, sub = null; if (ASN1.hasContent(tag, len, stream)) { // it has content, so we decode it var start = stream.pos; if (tag == 0x03) stream.get(); // skip BitString unused bits, must be in [0, 7] sub = []; if (len >= 0) { // definite length var end = start + len; while (stream.pos < end) { sub[sub.length] = ASN1.decode(stream); }if (stream.pos != end) throw "Content size is not correct for container starting at offset " + start; } else { // undefined length try { for (;;) { var s = ASN1.decode(stream); if (s.tag === 0) break; sub[sub.length] = s; } len = start - stream.pos; } catch (e) { throw "Exception while decoding undefined length content: " + e; } } } else stream.pos += len; // skip content return new ASN1(streamStart, header, len, tag, sub); }; ASN1.test = function () { var test = [{ value: [0x27], expected: 0x27 }, { value: [0x81, 0xC9], expected: 0xC9 }, { value: [0x83, 0xFE, 0xDC, 0xBA], expected: 0xFEDCBA }]; for (var i = 0, max = test.length; i < max; ++i) { var pos = 0, stream = new Stream(test[i].value, 0), res = ASN1.decodeLength(stream); if (res != test[i].expected) document.write("In test[" + i + "] expected " + test[i].expected + " got " + res + "\n"); } };