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pem
===
Create private keys and certificates with node.js
[](http://travis-ci.org/Dexus/pem) [](http://badge.fury.io/js/pem) [](https://www.npmjs.com/package/pem) [](https://dexus.github.io/pem/jsdoc/)
[](https://github.com/standard/standard)
## Installation
Install with npm
npm install pem
or use yarn
yarn add pem
:warning: Please make sure you have `openssl` or `libressl` already installed on your system/container, without
them `pem` will not work.
## Examples
Here are some examples for creating an SSL key/cert on the fly, and running an HTTPS server on port 443. 443 is the
standard HTTPS port, but requires root permissions on most systems. To get around this, you could use a higher port
number, like 4300, and use https://localhost:4300 to access your server.
### Basic https
```javascript
var https = require('https')
var pem = require('pem')
pem.createCertificate({ days: 1, selfSigned: true }, function (err, keys) {
if (err) {
throw err
}
https.createServer({ key: keys.clientKey, cert: keys.certificate }, function (req, res) {
res.end('o hai!')
}).listen(443)
})
```
### Express
```javascript
var https = require('https')
var pem = require('pem')
var express = require('express')
pem.createCertificate({ days: 1, selfSigned: true }, function (err, keys) {
if (err) {
throw err
}
var app = express()
app.get('/', function (req, res) {
res.send('o hai!')
})
https.createServer({ key: keys.clientKey, cert: keys.certificate }, app).listen(443)
})
```
## API
Please have a look into the [API documentation](https://dexus.github.io/pem/jsdoc/).
_we had to clean up a bit_
<!--
### Create a dhparam key
Use `createDhparam` for creating dhparam keys
pem.createDhparam(keyBitsize, callback)
Where
* **keyBitsize** is an optional size of the key, defaults to 512 (bit)
* **callback** is a callback function with an error object and `{dhparam}`
### Create a ecparam key
Use `createEcparam` for creating ecparam keys
pem.createEcparam(keyName, callback)
Where
* **keyName** is an optional name of the key curves name, defaults to secp256k1
* **callback** is a callback function with an error object and `{ecparam}`
### Create a private key
Use `createPrivateKey` for creating private keys
pem.createPrivateKey(keyBitsize, [options,] callback)
Where
* **keyBitsize** is an optional size of the key, defaults to 2048 (bit)
* **options** is an optional object of the cipher and password (both required for encryption), defaults {cipher:'',password:''}
(ciphers:["aes128", "aes192", "aes256", "camellia128", "camellia192", "camellia256", "des", "des3", "idea"])
* **callback** is a callback function with an error object and `{key}`
### Create a Certificate Signing Request
Use `createCSR` for creating certificate signing requests
pem.createCSR(options, callback)
Where
* **options** is an optional options object
* **callback** is a callback function with an error object and `{csr, clientKey}`
Possible options are the following
* **clientKey** is an optional client key to use
* **clientKeyPassword** the optional password for `clientKey`
* **keyBitsize** - if `clientKey` is undefined, bit size to use for generating a new key (defaults to 2048)
* **hash** is a hash function to use (either `md5`, `sha1` or `sha256`, defaults to `sha256`)
* **country** is a CSR country field
* **state** is a CSR state field
* **locality** is a CSR locality field
* **organization** is a CSR organization field
* **organizationUnit** is a CSR organizational unit field
* **commonName** is a CSR common name field (defaults to `localhost`)
* **altNames** is a list (`Array`) of subjectAltNames in the subjectAltName field (optional)
* **emailAddress** is a CSR email address field
* **csrConfigFile** is a CSR config file
### Create a certificate
Use `createCertificate` for creating private keys
pem.createCertificate(options, callback)
Where
* **options** is an optional options object
* **callback** is a callback function with an error object and `{certificate, csr, clientKey, serviceKey}`
Possible options include all the options for `createCSR` - in case `csr` parameter is not defined and a new
CSR needs to be generated.
In addition, possible options are the following
* **serviceKey** is a private key for signing the certificate, if not defined a new one is generated
* **serviceKeyPassword** Password of the service key
* **serviceCertificate** is the optional certificate for the `serviceKey`
* **serial** is the unique serial number for the signed certificate, required if `serviceCertificate` is defined
* **selfSigned** - if set to true and `serviceKey` is not defined, use `clientKey` for signing
* **csr** is a CSR for the certificate, if not defined a new one is generated
* **days** is the certificate expire time in days
* **extFile** extension config file - **without** `-extensions v3_req`
* **config** extension config file - **with** `-extensions v3_req`
### Export a public key
Use `getPublicKey` for exporting a public key from a private key, CSR or certificate
pem.getPublicKey(certificate, callback)
Where
* **certificate** is a PEM encoded private key, CSR or certificate
* **callback** is a callback function with an error object and `{publicKey}`
### Read certificate info
Use `readCertificateInfo` for reading subject data from a certificate or a CSR
pem.readCertificateInfo(certificate, callback)
Where
* **certificate** is a PEM encoded CSR or a certificate
* **callback** is a callback function with an error object and `{serial, country, state, locality, organization, organizationUnit, commonName, emailAddress, validity{start, end}, san{dns, ip, email}?, issuer{country, state, locality, organization, organizationUnit}, signatureAlgorithm, publicKeyAlgorithm, publicKeySize }`
? *san* is only present if the CSR or certificate has SAN entries.
*signatureAlgorithm, publicKeyAlgorithm and publicKeySize* only available if supportet and can parsed form openssl output
### Get fingerprint
Use `getFingerprint` to get the default SHA1 fingerprint for a certificate
pem.getFingerprint(certificate, [hash], callback)
Where
* **certificate** is a PEM encoded certificate
* **hash** is a hash function to use (either `md5`, `sha1` or `sha256`, defaults to `sha1`)
* **callback** is a callback function with an error object and `{fingerprint}`
### Get modulus
Use `getModulus` to get the modulus for a certificate, a CSR or a private key. Modulus can be useful to check that a Private Key Matches a Certificate
pem.getModulus(certificate, [password], [hash], callback)
Where
* **certificate** is a PEM encoded certificate, CSR or private key
* **password** is an optional passphrase for passpharse protected certificates
* **hash** is an optional hash function to use (up to now `md5` supported) (default: none)
* **callback** is a callback function with an error object and `{modulus}`
### Get DH parameter information
Use `getDhparamInfo` to get the size and prime of DH parameters.
pem.getDhparamInfo(dhparam, callback)
Where
* **dhparam** is a PEM encoded DH parameters string
* **callback** is a callback function with an error object and `{size, prime}`
### Export to a PKCS12 keystore
Use `createPkcs12` to export a certificate, the private key and optionally any signing or intermediate CA certificates to a PKCS12 keystore.
pem.createPkcs12(clientKey, certificate, p12Password, [options], callback)
Where
* **clientKey** is a PEM encoded private key
* **certificate** is a PEM encoded certificate
* **p12Password** is the password of the exported keystore
* **options** is an optional options object with `cipher`, (one of "aes128", "aes192", "aes256", "camellia128", "camellia192", "camellia256", "des", "des3" or "idea"), `clientKeyPassword` and `certFiles` (an array of additional certificates to include - e.g. CA certificates)
* **callback** is a callback function with an error object and `{pkcs12}` (binary)
### Read a PKCS12 keystore
Use `readPkcs12` to read a certificate, private key and CA certificates from a PKCS12 keystore.
pem.readPkcs12(bufferOrPath, [options], callback)
Where
* **bufferOrPath** is a PKCS12 keystore as a [Buffer](https://nodejs.org/api/buffer.html) or the path to a file
* **options** is an optional options object with `clientKeyPassword` which will be used to encrypt the stored key and `p12Password` which will be used to open the keystore
* **callback** is a callback function with an error object and `{key: String, cert: String, ca: Array}`
### Check a PKCS12 keystore
Use `checkPkcs12` to check a PKCS12 keystore.
pem.checkPkcs12(bufferOrPath, [passphrase], callback)
Where
* **bufferOrPath** is a PKCS12 keystore as a [Buffer](https://nodejs.org/api/buffer.html) or the path to a file
* **passphrase** is an optional passphrase which will be used to open the keystore
* **callback** is a callback function with an error object and a boolean as arguments
### Verify a certificate signing chain
Use `verifySigningChain` to assert that a given certificate has a valid signing chain.
pem.verifySigningChain(certificate, ca, callback)
Where
* **certificate** is a PEM encoded certificate string
* **ca** is a PEM encoded CA certificate string or an array of certificate strings
* **callback** is a callback function with an error object and a boolean as arguments
### Check a certificate file
Use `checkCertificate` to check / verify consistency of a certificate.
pem.checkCertificate(certificate, callback)
Where
* **certificate** is a PEM encoded certificate string
* **callback** is a callback function with an error object and a boolean as arguments
-->
### Custom extensions config file
You can specify custom OpenSSL extensions using the `config` or `extFile` options for `createCertificate` (or using `csrConfigFile` with `createCSR`).
`extFile` and `csrConfigFile` should be paths to the extension files. While `config` will generate a temporary file from the supplied file contents.
If you specify `config` then the `v3_req` section of your config file will be used.
The following would be an example of a Certificate Authority extensions file:
[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
commonName = Common Name
commonName_max = 64
[v3_req]
basicConstraints = critical,CA:TRUE
While the following would specify subjectAltNames in the resulting certificate:
[req]
req_extensions = v3_req
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names
[alt_names]
DNS.1 = host1.example.com
DNS.2 = host2.example.com
DNS.3 = host3.example.com
Note that `createCertificate` and `createCSR` supports the `altNames` option which would be easier to use in most cases.
:warning: **Warning: If you specify `altNames` the custom extensions file will not be passed to OpenSSL.**
### Setting openssl location
In some systems the `openssl` executable might not be available by the default name or it is not included in $PATH. In this case you can define the location of the executable yourself as a one time action after you have loaded the pem module:
```javascript
var pem = require('pem')
pem.config({
pathOpenSSL: '/usr/local/bin/openssl'
})
// do something with the pem module
```
### :warning: CSR/Certificates with special chars
For more details, search in `test/pem.spec.js`: `Create CSR with specialchars config file`
If you use special chars like:
```
-!$%^&*()_+|~=`{}[]:/;<>?,.@#
```
You should know that the result mey have escaped characters when you read it in your application.
Will try to fix this in the future, but not sure.
### Special thanks to
- Andris Reinman (@andris9) - Initiator of pem
## License
**MIT**