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JavaScript generic ASN.1 parser (mirror)
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465// Hex 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 Hex = {}, decoder;
Hex.decode = function(a) { var i; if (decoder === undefined) { var hex = "0123456789ABCDEF", 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 = [], bits = 0, 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 '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 "Hex encoding incomplete: 4 bits missing"; return out;};
// export globalsif (typeof module !== 'undefined') { module.exports = Hex; } else { window.Hex = Hex; }})();