@jill64/ecdsa-sig-formatter

ecdsa-sig-formatter

Translate between JOSE and ASN.1/DER encodings for ECDSA signatures

Install

npm install ecdsa-sig-formatter --save

Usage

var format = require('ecdsa-sig-formatter');

var derSignature = '..'; // asn.1/DER encoded ecdsa signature

var joseSignature = format.derToJose(derSignature);

API

.derToJose(Buffer|String signature, String alg) -> String

Convert the ASN.1/DER encoded signature to a JOSE-style concatenated signature. Returns a base64 url encoded String.

• If signature is a String, it should be base64 encoded
• alg must be one of ES256, ES384 or ES512

.joseToDer(Buffer|String signature, String alg) -> Buffer

Convert the JOSE-style concatenated signature to an ASN.1/DER encoded signature. Returns a Buffer

• If signature is a String, it should be base64 url encoded
• alg must be one of ES256, ES384 or ES512

Contributing

• Fork the repository. Committing directly against this repository is highly discouraged.

• Make your modifications in a branch, updating and writing new unit tests as necessary in the spec directory.

• Ensure that all tests pass with npm test

• rebase your changes against master. Do not merge.

• Submit a pull request to this repository. Wait for tests to run and someone to chime in.

Code Style

This repository is configured with EditorConfig and ESLint rules.