44 lines
1.1 KiB
JavaScript
44 lines
1.1 KiB
JavaScript
var _ = require('lodash');
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var Bitcore = require('bitcore');
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var PrivateKey = Bitcore.PrivateKey;
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var PublicKey = Bitcore.PublicKey;
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var Signature = Bitcore.crypto.Signature;
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var ECDSA = Bitcore.crypto.ECDSA;
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var Hash = Bitcore.crypto.Hash;
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var BufferReader = Bitcore.encoding.BufferReader;
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var SignUtils = function() {};
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/* TODO: It would be nice to be compatible with bitcoind signmessage. How
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* the hash is calculated there? */
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SignUtils.hash = function(text) {
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var buf = new Buffer(text);
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var ret = Hash.sha256sha256(buf);
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ret = new BufferReader(ret).readReverse();
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return ret;
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};
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SignUtils.sign = function(text, privKey) {
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var priv = new PrivateKey(privKey);
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var hash = SignUtils.hash(text);
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return ECDSA.sign(hash, priv, 'little').toString();
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};
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SignUtils.verify = function(text, signature, pubKey) {
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var pub = new PublicKey(pubKey);
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var hash = SignUtils.hash(text);
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try {
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var sig = new Signature.fromString(signature);
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return ECDSA.verify(hash, sig, pub, 'little');
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} catch (e) {
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return false;
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}
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};
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module.exports = SignUtils;
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