cert-info.js/README.md

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# [certpem.js](https://git.coolaj86.com/coolaj86/cert-info.js)
Read basic info from a cert.pem / x509 certificate.
Used for [Greenlock.js](https://git.coolaj86.com/coolaj86/greenlock-express.js)
# Install
```bash
# bin
npm install --global certpem
# node.js library
npm install --save certpem
```
# Usage
## CLI
For basic info (subject, altnames, issuedAt, expiresAt):
```bash
certpem /path/to/cert.pem
```
Output all info by passing `--debug` or use `--json` to see the basic info pretty-printed.
## node.js
```javascript
'use strict';
var certpem = require('certpem').certpem
var cert = fs.readFile('cert.pem', 'ascii', function (err, certstr) {
// basic info
console.info(certpem.info(certstr));
// way too much info
// (requires npm install --save node.extend@1)
console.info(certpem.debug(certstr));
});
```
Example output:
```javascript
{
"subject": "localhost.example.com",
"altnames": [
"localhost.example.com"
],
"issuedAt": 1465516800000,
"expiresAt": 1499731199000
}
```
With a few small changes this could also work in the browser (that's how its dependencies are designed).
# Legal
[certpem.js](https://git.coolaj86.com/coolaj86/certpem.js) |
MPL-2.0 |
[Terms of Use](https://therootcompany.com/legal/#terms) |
[Privacy Policy](https://therootcompany.com/legal/#privacy)