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JavaScript generic ASN.1 parser (mirror)
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102// Base64 JavaScript decoder// Copyright (c) 2008-2019 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 Base64 = {}, decoder, // populated on first usage haveU8 = ('Uint8Array' in (typeof window == 'object' ? window : global));
Base64.decode = function (a) { var i; if (decoder === undefined) { var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", ignore = "= \f\n\r\t\u00A0\u2028\u2029"; decoder = []; for (i = 0; i < 64; ++i) decoder[b64.charAt(i)] = i; for (i = 0; i < ignore.length; ++i) decoder[ignore.charAt(i)] = -1; // RFC 3548 URL & file safe encoding decoder['-'] = decoder['+']; decoder['_'] = decoder['/']; } var out = haveU8 ? new Uint8Array(a.length * 3 >> 2) : []; var bits = 0, char_count = 0, len = 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 'Illegal character at offset ' + i; bits |= c; if (++char_count >= 4) { out[len++] = (bits >> 16); out[len++] = (bits >> 8) & 0xFF; out[len++] = bits & 0xFF; bits = 0; char_count = 0; } else { bits <<= 6; } } switch (char_count) { case 1: throw "Base64 encoding incomplete: at least 2 bits missing"; case 2: out[len++] = (bits >> 10); break; case 3: out[len++] = (bits >> 16); out[len++] = (bits >> 8) & 0xFF; break; } if (haveU8 && out.length > len) // in case it was originally longer because of ignored characters out = out.subarray(0, len); return out;};
Base64.pretty = function (str) { // fix padding if (str.length % 4 > 0) str = (str + '===').slice(0, str.length + str.length % 4); // convert RFC 3548 to standard Base64 str = str.replace(/-/g, '+').replace(/_/g, '/'); // 80 column width return str.replace(/(.{80})/g, '$1\n');};
Base64.re = /-----BEGIN [^-]+-----([A-Za-z0-9+\/=\s]+)-----END [^-]+-----|begin-base64[^\n]+\n([A-Za-z0-9+\/=\s]+)====/;Base64.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 "RegExp out of sync"; } return Base64.decode(a);};
// export globalsif (typeof module !== 'undefined') { module.exports = Base64; } else { window.Base64 = Base64; }})();