ecdsa-sig-formatter

 

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

Install

``sh
npm install ecdsa-sig-formatter --save
`

Usage

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

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

var joseSignature = format.derToJose(derSignature);

`

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---

#### .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

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

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

3. Ensure that all tests pass with npm test

4. rebase` your changes against master. Do not merge.

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

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This repository is configured with [EditorConfig][EditorConfig] and
[ESLint][ESLint] rules.

[EditorConfig]: http://editorconfig.org/
[ESLint]: http://eslint.org