Pem2Jwk

A tool to convert a PEM file to a JSON Web Key (JWK). AThe package provides methods to convert both public and private PEM files, as well as a method to convert a private PEM to a public JWK.

Requirements

• OpenSSL 1.1.0 or later

Table of Contents

• fromPublic
• fromPrivate
• fromPrivateToPublic

---

fromPublic

This method takes a public PEM file and converts it to a JSON Web Key (JWK).

Syntax

Pem2Jwk.fromPublic<T>(publicPem: PEM, extraKeys?: T): PublicJWK<T>

Parameters

• publicPem: The public PEM file. Can be a string or a Buffer.
• extraKeys (optional): An object that provides additional information to be included in the JWK.

Return Value

The public JWK.

Example

const publicPem = `-----BEGIN PUBLIC KEY-----
...
-----END PUBLIC KEY-----`;
const publicJwk = Pem2Jwk.fromPublic(publicPem);
console.log(publicJwk);

---

fromPrivate

This method takes a private PEM file and converts it to a JSON Web Key (JWK).

Syntax

Pem2Jwk.fromPrivate<T>(privatePem: PEM, extraKeys?: T): PrivateJWK<T>

Parameters

• privatePem: The private PEM file. Can be a string or a Buffer.
• extraKeys (optional): An object that provides additional information to be included in the JWK.

Return Value

The private JWK.

Example

const privatePem = `-----BEGIN RSA PRIVATE KEY-----
...
-----END RSA PRIVATE KEY-----`;

const privateJwk = Pem2Jwk.fromPrivate(privatePem);
console.log(privateJwk);

---

fromPrivateToPublic

This method converts a private PEM key to a public JWK. The private PEM key is passed as a parameter to the method, and the public JWK is returned.

The method works by first creating a temporary PEM file from the private PEM key and then using openssl to generate a public key from that file. The public key is then converted to a JWK using the fromPublic method.

Syntax

Pem2Jwk.fromPrivateToPublic<T>(privatePem: PEM, extraKeys?: T): Promise<PublicJWK<T>>

Parameters

• privatePem: The private PEM file. Can be a string or a Buffer.
• extraKeys (optional): An object that provides additional information to be included in the JWK.

Return Value

A Promise that resolves to the public JWK.

Example

const privatePem = `-----BEGIN RSA PRIVATE KEY-----
...
-----END RSA PRIVATE KEY-----`;

Pem2Jwk.fromPrivateToPublic(privatePem).then(publicJwk => {
  console.log(publicJwk);
});