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# Verdaccio Module For User Auth Via Htpasswd

`verdaccio-htpasswd` is a default authentication plugin for the [Verdaccio](https://github.com/verdaccio/verdaccio).

> This plugin is being used as dependency after `v3.0.0-beta.x`. The `v2.x` still contains this plugin built-in.

## Install

As simple as running:

    $ npm install -g verdaccio-htpasswd

## Configure

    auth:
        htpasswd:
            file: ./htpasswd
            # Maximum amount of users allowed to register, defaults to "+infinity".
            # You can set this to -1 to disable registration.
            #max_users: 1000
            # Hash algorithm, possible options are: "bcrypt", "md5", "sha1", "crypt".
            #algorithm: bcrypt
            # Rounds number for "bcrypt", will be ignored for other algorithms.
            # Setting this value higher will result in password verification taking longer.
            #rounds: 10
            # Log a warning if the password takes more then this duration in milliseconds to verify.
            #slow_verify_ms: 200

### Bcrypt rounds

It is important to note that when using the default `bcrypt` algorithm and setting
the `rounds` configuration value to a higher number then the default of `10`, that
verification of a user password can cause significantly increased CPU usage and
additional latency in processing requests.

If your Verdaccio instance handles a large number of authenticated requests using
username and password for authentication, the `rounds` configuration value may need
to be decreased to prevent excessive CPU usage and request latency.

Also note that setting the `rounds` configuration value to a value that is too small
increases the risk of successful brute force attack. Auth0 has a
[blog article](https://auth0.com/blog/hashing-in-action-understanding-bcrypt)
that provides an overview of how `bcrypt` hashing works and some best practices.

## Logging In

To log in using NPM, run:

```
    npm adduser --registry  https://your.registry.local
```

## Generate htpasswd username/password combination

If you wish to handle access control using htpasswd file, you can generate
username/password combination form
[here](http://www.htaccesstools.com/htpasswd-generator/) and add it to htpasswd
file.

## How does it work?

The htpasswd file contains rows corresponding to a pair of username and password
separated with a colon character. The password is encrypted using the UNIX system's
crypt method and may use MD5 or SHA1.

## Plugin Development in Verdaccio

There are many ways to extend [Verdaccio](https://github.com/verdaccio/verdaccio),
currently it support authentication plugins, middleware plugins (since v2.7.0)
and storage plugins since (v3.x).

#### Useful Links

- [Plugin Development](http://www.verdaccio.org/docs/en/dev-plugins.html)
- [List of Plugins](http://www.verdaccio.org/docs/en/plugins.html)

## License

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