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106 lines
3.4 KiB
JavaScript
106 lines
3.4 KiB
JavaScript
const Base64 = {
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_keyStr: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',
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encode(input) {
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let output = '';
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let chr1;
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let chr2;
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let chr3;
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let enc1;
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let enc2;
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let enc3;
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let enc4;
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let i = 0;
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input = Base64._utf8_encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (Number.isNaN(chr2)) enc3 = enc4 = 64;
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else if (Number.isNaN(chr3)) enc4 = 64;
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output = output
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+ this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2)
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+ this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
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}
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return output;
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},
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decode(input) {
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let output = '';
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let chr1;
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let chr2;
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let chr3;
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let enc1;
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let enc2;
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let enc3;
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let enc4;
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let i = 0;
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input = input.replace(/[^A-Za-z0-9+/=]/g, '');
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while (i < input.length) {
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enc1 = this._keyStr.indexOf(input.charAt(i++));
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enc2 = this._keyStr.indexOf(input.charAt(i++));
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enc3 = this._keyStr.indexOf(input.charAt(i++));
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enc4 = this._keyStr.indexOf(input.charAt(i++));
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chr1 = (enc1 << 2) | (enc2 >> 4);
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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chr3 = ((enc3 & 3) << 6) | enc4;
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output += String.fromCharCode(chr1);
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if (enc3 !== 64) output += String.fromCharCode(chr2);
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if (enc4 !== 64) output += String.fromCharCode(chr3);
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}
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output = Base64._utf8_decode(output);
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return output;
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},
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_utf8_encode(string) {
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string = string.replace(/\r\n/g, '\n');
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let utftext = '';
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for (let n = 0; n < string.length; n++) {
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const c = string.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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} else if ((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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} else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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},
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_utf8_decode(utftext) {
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let string = '';
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let i = 0;
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let c = 0;
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let c2 = 0;
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let c3 = 0;
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while (i < utftext.length) {
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c = utftext.charCodeAt(i);
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if (c < 128) {
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string += String.fromCharCode(c);
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i++;
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} else if ((c > 191) && (c < 224)) {
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c2 = utftext.charCodeAt(i + 1);
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string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
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i += 2;
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} else {
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c2 = utftext.charCodeAt(i + 1);
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c3 = utftext.charCodeAt(i + 2);
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string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
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i += 3;
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}
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}
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return string;
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},
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};
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export default Base64;
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window.Hydro.utils.base64 = Base64;
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