portfolio2023/node_modules/tsse/readme.md

<h1 align="center">
  <b>tsse</b>
</h1>
<p align="center">
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  <br/>

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  <br/>

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</p>
<p align="center">
  ⏱ Constant time string/buffer equals.

  <br/>

  <sub>
    Coded with ❤️ by <a href="#authors">Simone Primarosa</a>.
  </sub>
</p>

## Synopsis
tsse is a string comparison algorithm to prevent Node.js timing attacks.

> This differs from `crypto.timingSafeEqual` because it: 
>  - supports both `strings` and `Buffers`;
>  - supports inputs of different lengths.

## Install

```
$ npm install --save tsse
```

## Usage

```js
const tsse = require('tsse');

const hash      = '0a4d55a8d778e5022fab701977c5d840bbc486d0';
const givenHash = '1265a5eb08997ced279d3854629cba68a378b528';

if (tsse(hash, givenHash)) {
  console.log('good hash');
} else {
  console.log('bad hash');
}
// => bad hash
```

## API

<a name="tsse"></a>

### tsse(hiddenStr, inputStr) ⇒ <code>boolean</code>
Does a constant-time String comparison.  
NOTE: When `hiddenStr` and `inputStr` have different lengths `hiddenStr` is compared to itself, which makes the comparison non-commutative (time-wise).

**Kind**: global function  
**Returns**: <code>boolean</code> - true if equals, false otherwise.  
**Access**: public  

| Param | Type | Description |
| --- | --- | --- |
| hiddenStr | <code>string</code> \| <code>Buffer</code> | A string that you don't want to leak. |
| inputStr | <code>string</code> \| <code>Buffer</code> | Another string. |

## Contributing
Contributions are REALLY welcome and if you find a security flaw in this code, PLEASE [report it][new issue].

## Authors
- **Simone Primarosa** - *Github* ([@simonepri][github:simonepri]) • *Twitter* ([@simoneprimarosa][twitter:simoneprimarosa])

See also the list of [contributors][contributors] who participated in this project.

## License
This project is licensed under the MIT License - see the [license][license] file for details.


<!-- Links -->
[new issue]: https://github.com/simonepri/tsse/issues/new
[contributors]: https://github.com/simonepri/tsse/contributors

[license]: https://github.com/simonepri/tsse/tree/master/license

[github:simonepri]: https://github.com/simonepri
[twitter:simoneprimarosa]: http://twitter.com/intent/user?screen_name=simoneprimarosa