@auth0/angular-jwt
Version:
JSON Web Token helper library for Angular
130 lines • 17.7 kB
JavaScript
// tslint:disable:no-bitwise
import { Injectable, Inject } from '@angular/core';
import { JWT_OPTIONS } from './jwtoptions.token';
import * as i0 from "@angular/core";
export class JwtHelperService {
constructor(config = null) {
this.tokenGetter = (config && config.tokenGetter) || function () { };
}
urlBase64Decode(str) {
let output = str.replace(/-/g, '+').replace(/_/g, '/');
switch (output.length % 4) {
case 0: {
break;
}
case 2: {
output += '==';
break;
}
case 3: {
output += '=';
break;
}
default: {
throw new Error('Illegal base64url string!');
}
}
return this.b64DecodeUnicode(output);
}
// credits for decoder goes to https://github.com/atk
b64decode(str) {
const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
let output = '';
str = String(str).replace(/=+$/, '');
if (str.length % 4 === 1) {
throw new Error(`'atob' failed: The string to be decoded is not correctly encoded.`);
}
for (
// initialize result and counters
let bc = 0, bs, buffer, idx = 0;
// get next character
(buffer = str.charAt(idx++));
// character found in table? initialize bit storage and add its ascii value;
~buffer &&
((bs = bc % 4 ? bs * 64 + buffer : buffer),
// and if not first of each 4 characters,
// convert the first 8 bits to one ascii character
bc++ % 4)
? (output += String.fromCharCode(255 & (bs >> ((-2 * bc) & 6))))
: 0) {
// try to find character in table (0-63, not found => -1)
buffer = chars.indexOf(buffer);
}
return output;
}
b64DecodeUnicode(str) {
return decodeURIComponent(Array.prototype.map
.call(this.b64decode(str), (c) => {
return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
})
.join(''));
}
decodeToken(token = this.tokenGetter()) {
if (token instanceof Promise) {
return token.then(t => this._decodeToken(t));
}
return this._decodeToken(token);
}
_decodeToken(token) {
if (!token || token === '') {
return null;
}
const parts = token.split('.');
if (parts.length !== 3) {
throw new Error(`The inspected token doesn't appear to be a JWT. Check to make sure it has three parts and see https://jwt.io for more.`);
}
const decoded = this.urlBase64Decode(parts[1]);
if (!decoded) {
throw new Error('Cannot decode the token.');
}
return JSON.parse(decoded);
}
getTokenExpirationDate(token = this.tokenGetter()) {
if (token instanceof Promise) {
return token.then(t => this._getTokenExpirationDate(t));
}
return this._getTokenExpirationDate(token);
}
_getTokenExpirationDate(token) {
let decoded;
decoded = this.decodeToken(token);
if (!decoded || !decoded.hasOwnProperty('exp')) {
return null;
}
const date = new Date(0);
date.setUTCSeconds(decoded.exp);
return date;
}
isTokenExpired(token = this.tokenGetter(), offsetSeconds) {
if (token instanceof Promise) {
return token.then(t => this._isTokenExpired(t, offsetSeconds));
}
return this._isTokenExpired(token, offsetSeconds);
}
_isTokenExpired(token, offsetSeconds) {
if (!token || token === '') {
return true;
}
const date = this.getTokenExpirationDate(token);
offsetSeconds = offsetSeconds || 0;
if (date === null) {
return false;
}
return !(date.valueOf() > new Date().valueOf() + offsetSeconds * 1000);
}
getAuthScheme(authScheme, request) {
if (typeof authScheme === 'function') {
return authScheme(request);
}
return authScheme;
}
}
JwtHelperService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.2.16", ngImport: i0, type: JwtHelperService, deps: [{ token: JWT_OPTIONS }], target: i0.ɵɵFactoryTarget.Injectable });
JwtHelperService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "12.2.16", ngImport: i0, type: JwtHelperService });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.2.16", ngImport: i0, type: JwtHelperService, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Inject,
args: [JWT_OPTIONS]
}] }]; } });
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{ HttpRequest } from '@angular/common/http';\n// tslint:disable:no-bitwise\n\nimport { Injectable, Inject } from '@angular/core';\nimport { JWT_OPTIONS } from './jwtoptions.token';\n\n@Injectable()\nexport class JwtHelperService {\n  tokenGetter: () => string | Promise<string>;\n\n  constructor(@Inject(JWT_OPTIONS) config: any = null) {\n    this.tokenGetter = (config && config.tokenGetter) || function () {};\n  }\n\n  public urlBase64Decode(str: string): string {\n    let output = str.replace(/-/g, '+').replace(/_/g, '/');\n    switch (output.length % 4) {\n      case 0: {\n        break;\n      }\n      case 2: {\n        output += '==';\n        break;\n      }\n      case 3: {\n        output += '=';\n        break;\n      }\n      default: {\n        throw new Error('Illegal base64url string!');\n      }\n    }\n    return this.b64DecodeUnicode(output);\n  }\n\n  // credits for decoder goes to https://github.com/atk\n  private b64decode(str: string): string {\n    const chars =\n      'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';\n    let output = '';\n\n    str = String(str).replace(/=+$/, '');\n\n    if (str.length % 4 === 1) {\n      throw new Error(\n        `'atob' failed: The string to be decoded is not correctly encoded.`\n      );\n    }\n\n    for (\n      // initialize result and counters\n      let bc = 0, bs: any, buffer: any, idx = 0;\n      // get next character\n      (buffer = str.charAt(idx++));\n      // character found in table? initialize bit storage and add its ascii value;\n      ~buffer &&\n      ((bs = bc % 4 ? bs * 64 + buffer : buffer),\n      // and if not first of each 4 characters,\n      // convert the first 8 bits to one ascii character\n      bc++ % 4)\n        ? (output += String.fromCharCode(255 & (bs >> ((-2 * bc) & 6))))\n        : 0\n    ) {\n      // try to find character in table (0-63, not found => -1)\n      buffer = chars.indexOf(buffer);\n    }\n    return output;\n  }\n\n  private b64DecodeUnicode(str: any) {\n    return decodeURIComponent(\n      Array.prototype.map\n        .call(this.b64decode(str), (c: any) => {\n          return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);\n        })\n        .join('')\n    );\n  }\n\n  public decodeToken<T = any>(token: string): T | null;\n  public decodeToken<T = any>(token: Promise<string>): Promise<T | null>;\n  public decodeToken<T = any>(): null | T | Promise<T | null>;\n  public decodeToken<T = any>(token: string | Promise<string> = this.tokenGetter()): null | T | Promise<T | null> {\n    if (token instanceof Promise) {\n      return token.then(t => this._decodeToken(t));\n    }\n\n    return this._decodeToken(token);\n  }\n\n  private _decodeToken<T = any>(token: string): null | T  {\n    if (!token || token === '') {\n      return null;\n    }\n\n    const parts = token.split('.');\n\n    if (parts.length !== 3) {\n      throw new Error(\n        `The inspected token doesn't appear to be a JWT. Check to make sure it has three parts and see https://jwt.io for more.`\n      );\n    }\n\n    const decoded = this.urlBase64Decode(parts[1]);\n    if (!decoded) {\n      throw new Error('Cannot decode the token.');\n    }\n\n    return JSON.parse(decoded);\n  }\n\n  public getTokenExpirationDate(token: string): Date | null;\n  public getTokenExpirationDate(token: Promise<string>): Promise<Date | null>;\n  public getTokenExpirationDate(): null | Date | Promise<Date | null>;\n  public getTokenExpirationDate(\n    token: string | Promise<string> = this.tokenGetter()\n  ): Date | null | Promise<Date | null> {\n    if (token instanceof Promise) {\n      return token.then(t => this._getTokenExpirationDate(t));\n    }\n\n    return this._getTokenExpirationDate(token);\n  }\n\n  private _getTokenExpirationDate(token: string): Date | null {\n    let decoded: any;\n    decoded = this.decodeToken(token);\n\n    if (!decoded || !decoded.hasOwnProperty('exp')) {\n      return null;\n    }\n\n    const date = new Date(0);\n    date.setUTCSeconds(decoded.exp);\n\n    return date;\n  }\n\n  public isTokenExpired(token?: undefined, offsetSeconds?: number): boolean | Promise<boolean>;\n  public isTokenExpired(token: string | null, offsetSeconds?: number): boolean;\n  public isTokenExpired(token: Promise<string>, offsetSeconds?: number): Promise<boolean>;\n  public isTokenExpired(\n    token: undefined | null | string | Promise<string> = this.tokenGetter(),\n    offsetSeconds?: number\n  ): boolean | Promise<boolean> {\n    if (token instanceof Promise) {\n      return token.then(t => this._isTokenExpired(t, offsetSeconds));\n    }\n\n    return this._isTokenExpired(token, offsetSeconds);\n  }\n\n  private _isTokenExpired(\n    token: string | null,\n    offsetSeconds?: number\n  ): boolean {\n    if (!token || token === '') {\n      return true;\n    }\n    const date = this.getTokenExpirationDate(token);\n    offsetSeconds = offsetSeconds || 0;\n\n    if (date === null) {\n      return false;\n    }\n\n    return !(date.valueOf() > new Date().valueOf() + offsetSeconds * 1000);\n  }\n\n  public getAuthScheme(\n    authScheme: Function | string | undefined,\n    request: HttpRequest<any>\n  ): string | undefined {\n    if (typeof authScheme === 'function') {\n      return authScheme(request);\n    }\n\n    return authScheme;\n  }\n}\n"]}