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66 lines
1.8 KiB
66 lines
1.8 KiB
# ecdsa-sig-formatter
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[](https://travis-ci.org/Brightspace/node-ecdsa-sig-formatter) [](https://coveralls.io/r/Brightspace/node-ecdsa-sig-formatter)
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Translate between JOSE and ASN.1/DER encodings for ECDSA signatures
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## Install
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```sh
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npm install ecdsa-sig-formatter --save
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```
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## Usage
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```js
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var format = require('ecdsa-sig-formatter');
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var derSignature = '..'; // asn.1/DER encoded ecdsa signature
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var joseSignature = format.derToJose(derSignature);
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```
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### API
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---
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#### `.derToJose(Buffer|String signature, String alg)` -> `String`
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Convert the ASN.1/DER encoded signature to a JOSE-style concatenated signature.
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Returns a _base64 url_ encoded `String`.
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* If _signature_ is a `String`, it should be _base64_ encoded
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* _alg_ must be one of _ES256_, _ES384_ or _ES512_
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---
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#### `.joseToDer(Buffer|String signature, String alg)` -> `Buffer`
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Convert the JOSE-style concatenated signature to an ASN.1/DER encoded
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signature. Returns a `Buffer`
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* If _signature_ is a `String`, it should be _base64 url_ encoded
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* _alg_ must be one of _ES256_, _ES384_ or _ES512_
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## Contributing
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1. **Fork** the repository. Committing directly against this repository is
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highly discouraged.
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2. Make your modifications in a branch, updating and writing new unit tests
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as necessary in the `spec` directory.
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3. Ensure that all tests pass with `npm test`
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4. `rebase` your changes against master. *Do not merge*.
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5. Submit a pull request to this repository. Wait for tests to run and someone
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to chime in.
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### Code Style
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This repository is configured with [EditorConfig][EditorConfig] and
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[ESLint][ESLint] rules.
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[EditorConfig]: http://editorconfig.org/
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[ESLint]: http://eslint.org
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