.-.-.-.-.-

src/ecdsa-sig-formatter.d.ts000064400000001266151676724660012016 0ustar00/// <reference types="node" />

declare module "ecdsa-sig-formatter" {
	/**
	 * 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
	 */
	export function derToJose(signature: Buffer | string, alg: string): string;

/**
	 * 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
	 */
	export function joseToDer(signature: Buffer | string, alg: string): Buffer
}
src/ecdsa-sig-formatter.js000064400000011621151676724660011556 0ustar00'use strict';

var Buffer = require('safe-buffer').Buffer;

var getParamBytesForAlg = require('./param-bytes-for-alg');

var MAX_OCTET = 0x80,
	CLASS_UNIVERSAL = 0,
	PRIMITIVE_BIT = 0x20,
	TAG_SEQ = 0x10,
	TAG_INT = 0x02,
	ENCODED_TAG_SEQ = (TAG_SEQ | PRIMITIVE_BIT) | (CLASS_UNIVERSAL << 6),
	ENCODED_TAG_INT = TAG_INT | (CLASS_UNIVERSAL << 6);

function base64Url(base64) {
	return base64
		.replace(/=/g, '')
		.replace(/\+/g, '-')
		.replace(/\//g, '_');
}

function signatureAsBuffer(signature) {
	if (Buffer.isBuffer(signature)) {
		return signature;
	} else if ('string' === typeof signature) {
		return Buffer.from(signature, 'base64');
	}

throw new TypeError('ECDSA signature must be a Base64 string or a Buffer');
}

function derToJose(signature, alg) {
	signature = signatureAsBuffer(signature);
	var paramBytes = getParamBytesForAlg(alg);

// the DER encoded param should at most be the param size, plus a padding
	// zero, since due to being a signed integer
	var maxEncodedParamLength = paramBytes + 1;

var inputLength = signature.length;

var offset = 0;
	if (signature[offset++] !== ENCODED_TAG_SEQ) {
		throw new Error('Could not find expected "seq"');
	}

var seqLength = signature[offset++];
	if (seqLength === (MAX_OCTET | 1)) {
		seqLength = signature[offset++];
	}

if (inputLength - offset < seqLength) {
		throw new Error('"seq" specified length of "' + seqLength + '", only "' + (inputLength - offset) + '" remaining');
	}

if (signature[offset++] !== ENCODED_TAG_INT) {
		throw new Error('Could not find expected "int" for "r"');
	}

var rLength = signature[offset++];

if (inputLength - offset - 2 < rLength) {
		throw new Error('"r" specified length of "' + rLength + '", only "' + (inputLength - offset - 2) + '" available');
	}

if (maxEncodedParamLength < rLength) {
		throw new Error('"r" specified length of "' + rLength + '", max of "' + maxEncodedParamLength + '" is acceptable');
	}

var rOffset = offset;
	offset += rLength;

if (signature[offset++] !== ENCODED_TAG_INT) {
		throw new Error('Could not find expected "int" for "s"');
	}

var sLength = signature[offset++];

if (inputLength - offset !== sLength) {
		throw new Error('"s" specified length of "' + sLength + '", expected "' + (inputLength - offset) + '"');
	}

if (maxEncodedParamLength < sLength) {
		throw new Error('"s" specified length of "' + sLength + '", max of "' + maxEncodedParamLength + '" is acceptable');
	}

var sOffset = offset;
	offset += sLength;

if (offset !== inputLength) {
		throw new Error('Expected to consume entire buffer, but "' + (inputLength - offset) + '" bytes remain');
	}

var rPadding = paramBytes - rLength,
		sPadding = paramBytes - sLength;

var dst = Buffer.allocUnsafe(rPadding + rLength + sPadding + sLength);

for (offset = 0; offset < rPadding; ++offset) {
		dst[offset] = 0;
	}
	signature.copy(dst, offset, rOffset + Math.max(-rPadding, 0), rOffset + rLength);

offset = paramBytes;

for (var o = offset; offset < o + sPadding; ++offset) {
		dst[offset] = 0;
	}
	signature.copy(dst, offset, sOffset + Math.max(-sPadding, 0), sOffset + sLength);

dst = dst.toString('base64');
	dst = base64Url(dst);

return dst;
}

function countPadding(buf, start, stop) {
	var padding = 0;
	while (start + padding < stop && buf[start + padding] === 0) {
		++padding;
	}

var needsSign = buf[start + padding] >= MAX_OCTET;
	if (needsSign) {
		--padding;
	}

return padding;
}

function joseToDer(signature, alg) {
	signature = signatureAsBuffer(signature);
	var paramBytes = getParamBytesForAlg(alg);

var signatureBytes = signature.length;
	if (signatureBytes !== paramBytes * 2) {
		throw new TypeError('"' + alg + '" signatures must be "' + paramBytes * 2 + '" bytes, saw "' + signatureBytes + '"');
	}

var rPadding = countPadding(signature, 0, paramBytes);
	var sPadding = countPadding(signature, paramBytes, signature.length);
	var rLength = paramBytes - rPadding;
	var sLength = paramBytes - sPadding;

var rsBytes = 1 + 1 + rLength + 1 + 1 + sLength;

var shortLength = rsBytes < MAX_OCTET;

var dst = Buffer.allocUnsafe((shortLength ? 2 : 3) + rsBytes);

return dst;
}

module.exports = {
	derToJose: derToJose,
	joseToDer: joseToDer
};
src/param-bytes-for-alg.js000064400000000710151676724660011464 0ustar00'use strict';

function getParamSize(keySize) {
	var result = ((keySize / 8) | 0) + (keySize % 8 === 0 ? 0 : 1);
	return result;
}

var paramBytesForAlg = {
	ES256: getParamSize(256),
	ES384: getParamSize(384),
	ES512: getParamSize(521)
};

function getParamBytesForAlg(alg) {
	var paramBytes = paramBytesForAlg[alg];
	if (paramBytes) {
		return paramBytes;
	}

throw new Error('Unknown algorithm "' + alg + '"');
}

module.exports = getParamBytesForAlg;
package.json000064400000004134151676724660007060 0ustar00{
  "_from": "ecdsa-sig-formatter@1.0.11",
  "_id": "ecdsa-sig-formatter@1.0.11",
  "_inBundle": false,
  "_integrity": "sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==",
  "_location": "/ecdsa-sig-formatter",
  "_phantomChildren": {},
  "_requested": {
    "type": "version",
    "registry": true,
    "raw": "ecdsa-sig-formatter@1.0.11",
    "name": "ecdsa-sig-formatter",
    "escapedName": "ecdsa-sig-formatter",
    "rawSpec": "1.0.11",
    "saveSpec": null,
    "fetchSpec": "1.0.11"
  },
  "_requiredBy": [
    "/jwa"
  ],
  "_resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
  "_shasum": "ae0f0fa2d85045ef14a817daa3ce9acd0489e5bf",
  "_spec": "ecdsa-sig-formatter@1.0.11",
  "_where": "C:\\xampp\\htdocs\\emeraltd\\node_modules\\jwa",
  "author": {
    "name": "D2L Corporation"
  },
  "bugs": {
    "url": "https://github.com/Brightspace/node-ecdsa-sig-formatter/issues"
  },
  "bundleDependencies": false,
  "dependencies": {
    "safe-buffer": "^5.0.1"
  },
  "deprecated": false,
  "description": "Translate ECDSA signatures between ASN.1/DER and JOSE-style concatenation",
  "devDependencies": {
    "bench": "^0.3.6",
    "chai": "^3.5.0",
    "coveralls": "^2.11.9",
    "eslint": "^2.12.0",
    "eslint-config-brightspace": "^0.2.1",
    "istanbul": "^0.4.3",
    "jwk-to-pem": "^1.2.5",
    "mocha": "^2.5.3",
    "native-crypto": "^1.7.0"
  },
  "homepage": "https://github.com/Brightspace/node-ecdsa-sig-formatter#readme",
  "keywords": [
    "ecdsa",
    "der",
    "asn.1",
    "jwt",
    "jwa",
    "jsonwebtoken",
    "jose"
  ],
  "license": "Apache-2.0",
  "main": "src/ecdsa-sig-formatter.js",
  "name": "ecdsa-sig-formatter",
  "repository": {
    "type": "git",
    "url": "git+ssh://git@github.com/Brightspace/node-ecdsa-sig-formatter.git"
  },
  "scripts": {
    "check-style": "eslint .",
    "pretest": "npm run check-style",
    "report-cov": "cat ./coverage/lcov.info | coveralls",
    "test": "istanbul cover --root src _mocha -- spec"
  },
  "typings": "./src/ecdsa-sig-formatter.d.ts",
  "version": "1.0.11"
}
LICENSE000064400000026060151676724660005601 0ustar00Apache License
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CODEOWNERS000064400000000013151676724660006155 0ustar00* @omsmith
README.md000064400000003520151676724660006047 0ustar00# ecdsa-sig-formatter

[![Build Status](https://travis-ci.org/Brightspace/node-ecdsa-sig-formatter.svg?branch=master)](https://travis-ci.org/Brightspace/node-ecdsa-sig-formatter) [![Coverage Status](https://coveralls.io/repos/Brightspace/node-ecdsa-sig-formatter/badge.svg)](https://coveralls.io/r/Brightspace/node-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);

```

### 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

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.

### Code Style

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

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

/home/emeraadmin/.htpasswds/../public_html/test/../node_modules/../4d695/ecdsa-sig-formatter.tar