// Base64 JavaScript decoder
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// Copyright (c) 2008-2013 Lapo Luchini <lapo@lapo.it>
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/*jshint browser: true, strict: true, immed: true, latedef: true, undef: true, regexdash: false */
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var decoder;
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export var Base64 = {
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decode: function (a) {
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var i;
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if (decoder === undefined) {
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var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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var ignore = "= \f\n\r\t\u00A0\u2028\u2029";
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decoder = Object.create(null);
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for (i = 0; i < 64; ++i) {
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decoder[b64.charAt(i)] = i;
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}
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decoder['-'] = 62; //+
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decoder['_'] = 63; //-
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for (i = 0; i < ignore.length; ++i) {
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decoder[ignore.charAt(i)] = -1;
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}
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}
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var out = [];
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var bits = 0;
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var char_count = 0;
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for (i = 0; i < a.length; ++i) {
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var c = a.charAt(i);
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if (c == "=") {
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break;
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}
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c = decoder[c];
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if (c == -1) {
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continue;
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}
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if (c === undefined) {
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throw new Error("Illegal character at offset " + i);
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}
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bits |= c;
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if (++char_count >= 4) {
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out[out.length] = (bits >> 16);
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out[out.length] = (bits >> 8) & 0xFF;
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out[out.length] = bits & 0xFF;
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bits = 0;
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char_count = 0;
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}
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else {
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bits <<= 6;
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}
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}
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switch (char_count) {
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case 1:
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throw new Error("Base64 encoding incomplete: at least 2 bits missing");
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case 2:
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out[out.length] = (bits >> 10);
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break;
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case 3:
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out[out.length] = (bits >> 16);
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out[out.length] = (bits >> 8) & 0xFF;
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break;
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}
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return out;
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},
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re: /-----BEGIN [^-]+-----([A-Za-z0-9+\/=\s]+)-----END [^-]+-----|begin-base64[^\n]+\n([A-Za-z0-9+\/=\s]+)====/,
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unarmor: function (a) {
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var m = Base64.re.exec(a);
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if (m) {
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if (m[1]) {
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a = m[1];
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}
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else if (m[2]) {
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a = m[2];
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}
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else {
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throw new Error("RegExp out of sync");
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}
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}
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return Base64.decode(a);
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}
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};
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