forked from coolaj86/eckles.js
37 lines
1013 B
JavaScript
37 lines
1013 B
JavaScript
// Copyright 2016-2018 AJ ONeal. All rights reserved
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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'use strict';
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var curves = {
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"P-256": "prime256v1" // 65
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, "secp256r1": "prime256v1"
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, "P-384": "secp384r1" // 97
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, "P-521": "secp521r1" // 133
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};
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var crv = "P-256";
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var ecdh = require('crypto').createECDH(curves[crv] || crv);
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var keys = ecdh.generateKeys(null, 'uncompressed');
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console.log(keys.length);
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console.log(keys.toString('hex'));
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keys = keys.slice(1);
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var x = keys.slice(0, keys.byteLength / 2);
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var y = keys.slice(keys.byteLength / 2);
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while (0 === x[0]) { x = x.slice(1); }
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while (0 === y[0]) { y = y.slice(1); }
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console.log({
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kty: "EC"
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, crv: "P-XXX"
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, x: _toUrlBase64(x)
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, y: _toUrlBase64(y)
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});
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function _toUrlBase64(buf) {
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return buf.toString('base64')
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.replace(/\+/g, "-")
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.replace(/\//g, "_")
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.replace(/=/g,"")
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;
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}
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