@imajin/rx-otp/esm2015/lib/components/totp.js

HMAC-based (HOTP) and Time-based (TOTP) One-Time Password manager. Works with Google Authenticator for Two-Factor Authentication.

import { mergeMap, of } from 'rxjs';
import { map } from 'rxjs/operators';
import { HOTP } from './hotp';
import { Validator } from '../schemas/validator';
export class TOTP {
}
TOTP.generate = (key, options = {}) => of(Object.assign(Object.assign({}, options), { key }))
    .pipe(mergeMap((data) => Validator.validateDataWithSchemaReference('/rx-otp/schemas/totp-generate.json', data)), map((_) => ({
    key: _.key,
    options: {
        key_format: _.key_format,
        counter: Math.floor((_.timestamp / 1000) / _.time),
        code_digits: _.code_digits,
        add_checksum: _.add_checksum,
        truncation_offset: _.truncation_offset,
        algorithm: _.algorithm
    }
})), mergeMap((_) => HOTP.generate(_.key, _.options)));
TOTP.verify = (token, key, options = {}) => of(Object.assign(Object.assign({}, options), { token, key }))
    .pipe(mergeMap((data) => Validator.validateDataWithSchemaReference('/rx-otp/schemas/totp-verify.json', data)), map((_) => ({
    token: _.token,
    key: _.key,
    options: {
        key_format: _.key_format,
        window: _.window,
        counter: Math.floor((_.timestamp / 1000) / _.time),
        add_checksum: _.add_checksum,
        truncation_offset: _.truncation_offset,
        algorithm: _.algorithm,
        previous_otp_allowed: true
    }
})), mergeMap((_) => HOTP.verify(_.token, _.key, _.options)));