# SSH Fingerprint (for node.js)

A minimal library to read an SSH public key (`id_rsa.pub`)
and generate its fingerprint.

Works for RSA and ECDSA public keys.

Features
========

&lt; 100 lines of code | <1kb gzipped | 1.8kb minified | 3.1kb with comments

* [x] SSH Public Key SHA256 Fingerprints
  * RSA (2048-bit, 3072-bit, 4096-bit)
  * EC / ECDSA
    * P-256 (prime256v1, secp256r1)
    * P-384 (secp384r1)
* [x] Browser Version
  * [Bluecrypt SSH Fingerprint](https://git.coolaj86.com/coolaj86/bluecrypt-ssh-fingerprint.js)

# CLI

You can install `ssh-fingerprint` and use it from command line:

```bash
npm install -g ssh-fingerprint
```

```bash
ssh-fingerprint ~/.ssh/id_rsa.pub
```

```
2048 SHA256:yCB62vBVsOwqksgYwy/WDbaMF2PhPijAwcrlzmrxfko root@localhost (RSA)
```

(the output is the same as `ssh-keygen -lf ~/.ssh/id_rsa.pub`)

# Usage

You can also use it from JavaScript:

**SSH Fingerprint**

```js
var fs = require('fs');
var SSH = require('ssh-fingerprint');
var pub = fs.readFileSync("./id_rsa.pub");

SSH.fingerprint({ pub: pub }).then(function (fing) {
  console.info('The key fingerprint is:');
  console.info(fing.fingerprint, fing.comment);
  // SHA256:yCB62vBVsOwqksgYwy/WDbaMF2PhPijAwcrlzmrxfko root@localhost
});
```

# Legal

[ssh-fingerprint.js](https://git.coolaj86.com/coolaj86/ssh-fingerprint.js) |
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