wrapper for keytool binary

Usage no npm install needed!

<script type="module">
  import expoNodeKeytool from 'https://cdn.skypack.dev/@expo/node-keytool';



Basic wrapper for the Java keytool.


To include node-keytool in Node, first install it using npm:

npm install node-keytool

Second, require the library:

var Keytool = require('node-keytool');

Then, open / create your keystore file:

// Keytool(filename, storepass, options)
var store = Keytool('example.keystore', 'changeit', {debug: false, storetype: 'JCEKS'});

Finally, execute the desired functions on the Keytool object.


Keytool(filename, storepass, options)

Constructs a Keytool object from a keystore file (filename) using the password from storepass.

Possible options

debug (boolean, if true all keytool output is piped to stdout/stderr)

storetype: keystore type (defaults to JKS, some actions require other storage types), executable (see below)

The library assumes that the keytool executable is on your PATH. In other cases, you can specify a path to the executable by passing the appropriate option:

var store = Keytool(filename, storepass, {executable: '/usr/bin/keytool'});


Most keytool actions are supported with their stdin input method or file-based operations. All operations expect a callback (cb) of the form function(err, result) as the last argument. See the manpage for keytool for more details.

Certificate Request: certreq

certreq(alias, keypass, dname, outfile, sigalg, cb)

Generates a certificate request for the given alias. If outfile is omitted or null, res.outdata will contain the certificate data.

Rename an alias: changealias

changealias(alias, keypass, destalias, cb)

Renames alias to destalias.

Export a certificate: exportcert

exportcert(alias, filename, rfcoutput, cb)

Exports the given certificate to the output file filename.

If rfcoutput is true the result is output in RFC 1421 compliant base64 encoding. Binary DER is the default.

Generate a keypair: genkeypair

genkeypair(alias, keypass, dname, validity, keysize, keyalg, sigalg, destalias, startdate, x509ext, cb)

Generates a keypair.

dname: Distinguished name, e.g. CN=abc,OU=dev

validity: Integer, Number of days this certificate should be valid

x509ext: String-Array, multiple extensions can be specified

startdate: JavaScript Date object

Generate a certificate: gencert

gencert(alias, keypass, dname, infile, datain, outfile, rfcoutput, validity, sigalg, startdate, cb)

Generates a certificate from the request given as a) an input file (parameter infile) or b) as a string in-memory (parameter datain).

If the parameter outfile is omitted or null, the result object contains the certificate data.

If the parameter dname is specified, this will be used in favor of the distinguished name used to generate the request.

startdate: JavaScript Date object

Import a certificate: importcert

importcert(alias, keypass, infile, datain, trustcacerts, cb)

Imports a certificate from a file (parameter infile) or from a string (parameter datain).

trustcacerts: Boolean

Import a passphrase: importpass

importpass(alias, keypass, data, keyalg, keysize, cb)

Imports a passphrase into the keystore.

Note: This operation is not supported by the default keystore type (JKS). Use JCEKS or similar if you need this.

Change a keys password: keypasswd

keypasswd(alias, keypass, newkeypass, cb)

Changes the password for the given alias from keypass to newkeypass.

Change the keystore password: storepasswd

storepasswd(newstorepass, cb)

Changes the password for the keystore itself.

Get basic information on a certificate in the keystore: getcert

getcert(file, data, sslserver, jarfile, rfcoutput, cb)

If rfcoutput is true, the callback will contain the BASE64 encoded representation of the certificate given in file (string, filename) or data (string).

If rfcoutput is false, basic certificate information will be parsed from the keytool output (signature algorithms, validity information, issuer / owner - where applicable).

Delete an alias from the keystore: deletealias

deletealias(alias, keypass, cb)

Removes an alias completely.

List the content of the keystore: getlist


Reads the content of the keystore. See examples/listcontent.js for an example on how to use the results.

Create empty keystore: create


Creates an empty keystore at the previously specified location. Fails if the targeted file already exists.