gen-totp
v2.0.6
Published
A time-based One-time Password generator that uses current time as a source of uniqueness, following RFC 6238.
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Generate TOTP
Time-based One-Time Password (TOTP) is an algorithm that generates a one-time password based on the current time. TOTP is an extension of the HMAC-based One-Time Password (HOTP) algorithm and is standardized in RFC 6238. For more details, see Wikipedia.
Table of Contents
Installation
You can install gen-totp
via npm or yarn:
npm install gen-totp
# or
yarn add gen-totp
Usage
Basic Usage
import genTOTP from 'gen-totp';
const otp = genTOTP('test-key');
// Returns a 6-digit OTP by default
console.log(otp);
Customizing OTP Length
import genTOTP from 'gen-totp';
const otp = genTOTP('test-key', { digits: 4 });
// Returns a 4-digit OTP
console.log(otp);
Options
The genTOTP function accepts two parameters:
key
: A string containing the base32-encoded secret key. It can include numbers, uppercase letters,_
, and-
.options
: An optional object to customize the OTP generation. The availableoptions
are detailed in the table below:
| Option | Type | Default | Description |
|------------|--------|---------|--------------------------------------------------------------------------------------------------|
| digits
| number | 6 | The number of digits in the generated OTP. |
| period
| number | 30 | The time period (in seconds) after which a new OTP is generated. |
| algorithm
| string | 'SHA-1' | The hashing algorithm used to generate the OTP. Supported algorithms include: |
| | | | - SHA-1
|
| | | | - SHA-224
|
| | | | - SHA-256
|
| | | | - SHA-384
|
| | | | - SHA-512
|
| | | | - SHA3-224
|
| | | | - SHA3-256
|
| | | | - SHA3-384
|
| | | | - SHA3-512
|
| | | | For more details, refer to the JsSHA documentation. |
Documentation
For more detailed documentation, visit the Official Documentation.
Contributing
Contributions are welcome! If you have any bug reports, suggestions, or feature requests, please open an issue on GitHub.
To contribute:
- Fork the repository
- Create a new feature branch (
git checkout -b feature/new-feature
) - Commit your changes (
git commit -m 'Add new feature'
) - Push to the branch (
git push origin feature/new-feature
) - Create a new Pull Request
Make sure to follow the Contributor Covenant Code of Conduct when participating in the project.