43 lines
998 B
JavaScript
43 lines
998 B
JavaScript
/**
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* Browser eccrypto implementation.
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*/
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"use strict";
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require("es6-promise").polyfill();
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var EC = require("elliptic").ec;
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var ec = new EC("secp256k1");
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exports.getPublic = function(privateKey) {
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// `elliptic` doesn't have such checkings so we do it by ourself. We
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// should always ensure that library user doesn't try to do something
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// dumb.
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if (privateKey.length !== 32) {
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throw new Error("Bad private key");
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}
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// XXX(Kagami): `elliptic.utils.encode` returns array for every
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// encoding except `hex`.
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return new Buffer(ec.keyPair(privateKey).getPublic("arr"));
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};
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exports.sign = function(privateKey, msg) {
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var key = ec.keyPair(privateKey);
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var sig;
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try {
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sig = new Buffer(key.sign(msg).toDER());
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return Promise.resolve(sig);
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} catch(e) {
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return Promise.reject();
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}
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};
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exports.verify = function(key, msg, sig) {
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key = ec.keyPair(key);
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if (key.verify(msg, sig)) {
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return Promise.resolve();
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} else {
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return Promise.reject();
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}
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};
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