77 lines
2.9 KiB
JavaScript
77 lines
2.9 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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var b64re = /^(?:[A-Za-z\d+\/]{4})*?(?:[A-Za-z\d+\/]{2}(?:==)?|[A-Za-z\d+\/]{3}=?)?$/;
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exports.weBtoa = function (string) {
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string = String(string);
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var bitmap, a, b, c, result = "", i = 0, rest = string.length % 3;
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for (; i < string.length;) {
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if ((a = string.charCodeAt(i++)) > 255 ||
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(b = string.charCodeAt(i++)) > 255 ||
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(c = string.charCodeAt(i++)) > 255)
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throw new TypeError("Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.");
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bitmap = (a << 16) | (b << 8) | c;
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result += b64.charAt(bitmap >> 18 & 63) + b64.charAt(bitmap >> 12 & 63) +
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b64.charAt(bitmap >> 6 & 63) + b64.charAt(bitmap & 63);
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}
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return rest ? result.slice(0, rest - 3) + "===".substring(rest) : result;
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};
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exports.weAtob = function (string) {
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string = String(string).replace(/[\t\n\f\r ]+/g, "");
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if (!b64re.test(string))
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throw new TypeError("Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.");
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string += "==".slice(2 - (string.length & 3));
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var bitmap, result = "", r1, r2, i = 0;
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for (; i < string.length;) {
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bitmap = b64.indexOf(string.charAt(i++)) << 18 | b64.indexOf(string.charAt(i++)) << 12 |
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(r1 = b64.indexOf(string.charAt(i++))) << 6 | (r2 = b64.indexOf(string.charAt(i++)));
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result += r1 === 64 ? String.fromCharCode(bitmap >> 16 & 255) :
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r2 === 64 ? String.fromCharCode(bitmap >> 16 & 255, bitmap >> 8 & 255) :
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String.fromCharCode(bitmap >> 16 & 255, bitmap >> 8 & 255, bitmap & 255);
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}
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return result;
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};
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function b64DecodeUnicode(str) {
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return decodeURIComponent(exports.weAtob(str).replace(/(.)/g, function (p) {
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var code = p.charCodeAt(0).toString(16).toUpperCase();
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if (code.length < 2) {
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code = "0" + code;
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}
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return "%" + code;
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}));
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}
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function base64_url_decode(str) {
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var output = str.replace(/-/g, "+").replace(/_/g, "/");
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switch (output.length % 4) {
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case 0:
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break;
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case 2:
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output += "==";
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break;
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case 3:
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output += "=";
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break;
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default:
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throw "Illegal base64url string!";
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}
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try {
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return b64DecodeUnicode(output);
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}
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catch (err) {
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return exports.weAtob(output);
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}
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}
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function weappJwtDecode(token, options) {
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if (typeof token !== "string") {
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throw ("Invalid token specified");
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}
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options = options || {};
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var pos = options.header === true ? 0 : 1;
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try {
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return JSON.parse(base64_url_decode(token.split(".")[pos]));
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}
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catch (e) {
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throw ("Invalid token specified: " + e.message);
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}
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}
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exports.default = weappJwtDecode;
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