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add extra validation to prevent invalid public keys being used. (as per issue 39)

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OutCast3k 2016-02-09 23:27:34 +00:00
parent c276998687
commit 27c9bff17e
1 changed files with 15 additions and 12 deletions
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27
js/coin.js
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@ -278,20 +278,23 @@
/* decompress an compressed public key */ /* decompress an compressed public key */
coinjs.pubkeydecompress = function(pubkey) { coinjs.pubkeydecompress = function(pubkey) {
var curve = EllipticCurve.getSECCurveByName("secp256k1"); if((typeof(pubkey) == 'string') && pubkey.match(/^[a-f0-9]+$/i)){
try { var curve = EllipticCurve.getSECCurveByName("secp256k1");
var pt = curve.curve.decodePointHex(pubkey); try {
var x = pt.getX().toBigInteger(); var pt = curve.curve.decodePointHex(pubkey);
var y = pt.getY().toBigInteger(); var x = pt.getX().toBigInteger();
var y = pt.getY().toBigInteger();
var publicKeyBytes = EllipticCurve.integerToBytes(x, 32); var publicKeyBytes = EllipticCurve.integerToBytes(x, 32);
publicKeyBytes = publicKeyBytes.concat(EllipticCurve.integerToBytes(y,32)); publicKeyBytes = publicKeyBytes.concat(EllipticCurve.integerToBytes(y,32));
publicKeyBytes.unshift(0x04); publicKeyBytes.unshift(0x04);
return Crypto.util.bytesToHex(publicKeyBytes); return Crypto.util.bytesToHex(publicKeyBytes);
} catch (e) { } catch (e) {
// console.log(e); // console.log(e);
return false; return false;
}
} }
return false;
} }
coinjs.testdeterministicK = function() { coinjs.testdeterministicK = function() {