f10072c932
Also do not use Promise shim in browsers since it's supported natively by new browsers (and we can use only new browsers because of the WebCryptoAPI).
65 lines
1.7 KiB
JavaScript
65 lines
1.7 KiB
JavaScript
/**
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* Node.js eccrypto implementation.
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* @module eccrypto
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*/
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"use strict";
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var promise = typeof Promise === "undefined" ?
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require("es6-promise").Promise :
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Promise;
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var secp256k1 = require("secp256k1");
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/**
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* Compute the public key for a given private key.
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* @param {Buffer} privateKey - A 32-byte private key
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* @return {Buffer} A 65-byte public key.
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* @function
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*/
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var getPublic = exports.getPublic = secp256k1.createPublicKey;
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/**
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* Create an ECDSA signature.
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* @param {Buffer} privateKey - A 32-byte private key
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* @param {Buffer} msg - The message being signed
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* @return {Promise.<Buffer>} A promise that resolves with the
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* signature and rejects on bad key or message.
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*/
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// FIXME(Kagami): What to do in case of invalid nonce?
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exports.sign = function(privateKey, msg) {
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return new promise(function(resolve, reject) {
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try {
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secp256k1.sign(privateKey, msg, function(code, sig) {
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if (code === 1) {
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resolve(sig);
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} else {
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reject();
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}
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});
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} catch(e) {
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reject();
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}
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});
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};
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/**
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* Verify an ECDSA signature.
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* @param {Buffer} key - A private or public key
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* @param {Buffer} msg - The message being verified
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* @param {Buffer} sig - The signature
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* @return {Promise.<undefined>} A promise that resolves on correct
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* signature and rejects on bad key or signature.
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*/
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exports.verify = function(key, msg, sig) {
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var publicKey = key.length === 32 ? getPublic(key) : key;
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return new promise(function(resolve, reject) {
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secp256k1.verify(publicKey, msg, sig, function(code) {
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if (code === 1) {
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resolve();
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} else {
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reject();
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}
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});
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});
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};
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