de6ffc2f76
'use strict' is unnecessary inside modules because module code is always strict mode code. Ref: https://www.ecma-international.org/ecma-262/6.0/#sec-strict-mode-code
70 lines
2.5 KiB
JavaScript
70 lines
2.5 KiB
JavaScript
// OpenPGP.js - An OpenPGP implementation in javascript
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// Copyright (C) 2015-2016 Decentral
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3.0 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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// Implementation of ECDSA following RFC6637 for Openpgpjs
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/**
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* @requires crypto/hash
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* @requires crypto/public_key/jsbn
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* @requires crypto/public_key/elliptic/curves
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* @module crypto/public_key/elliptic/ecdsa
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*/
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import hash from '../../hash';
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import curves from './curves';
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import BigInteger from '../jsbn';
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/**
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* Sign a message using the provided key
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* @param {String} oid Elliptic curve for the key
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* @param {enums.hash} hash_algo Hash algorithm used to sign
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* @param {Uint8Array} m Message to sign
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* @param {BigInteger} d Private key used to sign
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* @return {{r: BigInteger, s: BigInteger}} Signature of the message
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*/
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async function sign(oid, hash_algo, m, d) {
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const curve = curves.get(oid);
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const key = curve.keyFromPrivate(d.toByteArray());
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const signature = await key.sign(m, hash_algo);
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return {
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r: new BigInteger(signature.r.toArray()),
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s: new BigInteger(signature.s.toArray())
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};
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}
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/**
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* Verifies if a signature is valid for a message
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* @param {String} oid Elliptic curve for the key
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* @param {enums.hash} hash_algo Hash algorithm used in the signature
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* @param {{r: BigInteger, s: BigInteger}} signature Signature to verify
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* @param {Uint8Array} m Message to verify
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* @param {BigInteger} Q Public key used to verify the message
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* @return {Boolean}
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*/
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async function verify(oid, hash_algo, signature, m, Q) {
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const curve = curves.get(oid);
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const key = curve.keyFromPublic(Q.toByteArray());
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return key.verify(
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m, { r: signature.r.toByteArray(), s: signature.s.toByteArray() }, hash_algo
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);
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}
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module.exports = {
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sign: sign,
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verify: verify
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};
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