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onion-wownero-explorer
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decoding encrypted payment id using js added

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master
moneroexamples 7 years ago
parent 098949ff80
commit ac23814b1d
2 changed files with 54 additions and 51 deletions
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17
src/templates/js/cn_util.js
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@ -2185,6 +2185,23 @@ var cnUtil = (function(initConfig) {
}
};
//decode amount and mask and check against commitment
// from https://xmr.llcoins.net/js/site.js
// from https://xmr.llcoins.net/js/site.js
this.decodeRct = function(rv, i, der){
var key = derivation_to_scalar(der, i);
var ecdh = decode_rct_ecdh(rv.ecdhInfo[i], key);
//console.log(ecdh);
var Ctmp = commit(ecdh.amount, ecdh.mask);
//console.log(Ctmp);
if (Ctmp !== rv.outPk[i]){
throw "mismatched commitments!";
}
ecdh.amount = s2d(ecdh.amount);
return ecdh;
};
function assert(stmt, val) {
if (!stmt) {
throw "assert failed" + (val !== undefined ? ': ' + val : '');

86
src/templates/partials/tx_details.html
Unescape Escape View File

@ -8,12 +8,12 @@
<H5 style="margin:5px">Tx public key: <span id="tx_pub_key">{{tx_pub_key}}</span></H5>
{{#has_payment_id}}
<H5 style="margin:5px">Payment id: {{payment_id}}</H5>
<H5 style="margin:5px">Payment id: <span id="payment_id">{{payment_id}}</span></H5>
<H5 style="margin:5px">Payment id as ascii: {{payment_id_as_ascii}}</H5>
{{/has_payment_id}}
{{#has_payment_id8}}
<H5 style="margin:5px">Payment id (encrypted): {{payment_id8}}</H5>
<H5 style="margin:5px">Payment id (encrypted): <span id="payment_id">{{payment_id8}}</span></H5>
{{/has_payment_id8}}
@ -154,7 +154,7 @@
{{#enable_js}}
<!-- to disply results from deconding and proving txs using js -->
<div id="decode-prove-results" class="center" style="width: 80%; margin-top:10px">
<div id="decode-prove-results" class="center" style="width: 80%; margin-top:10px;border-style: dotted">
</div>
@ -172,15 +172,22 @@
var tx_public_key = $("#tx_pub_key").text();
var payment_id = $("#payment_id").text();
$("#decode_btn").click(function() {
var address = $("input[name=xmr_address]").val();
var viewkey = $("input[name=viewkey]").val();
if (!address || !viewkey) {
$("#decode-prove-results").html("<h4>Address or viewkey key not provided!</h4>");
return;
}
var address_decoded = decode_address(address);
decodeOutputs(tx_json, tx_public_key, viewkey, address_decoded.spend);
decodeOutputs(tx_json, tx_public_key, viewkey, address_decoded.spend, payment_id);
});
@ -189,15 +196,20 @@
var address = $("input[name=xmraddress]").val();
var tx_prv_key = $("input[name=txprvkey]").val();
if (!address || !tx_prv_key) {
$("#decode-prove-results").html("<h4>Address or tx private key not provided!</h4>");
return;
}
var address_decoded = decode_address(address);
decodeOutputs(tx_json, address_decoded.view, tx_prv_key, address_decoded.spend);
decodeOutputs(tx_json, address_decoded.view, tx_prv_key, address_decoded.spend, payment_id);
});
});
function decodeOutputs(tx_json, pub_key, sec_key, address_pub_key) {
function decodeOutputs(tx_json, pub_key, sec_key, address_pub_key, payment_id) {
//console.log(tx_json);
var is_rct = (tx_json.version === 2);
@ -209,10 +221,17 @@
// go over each tx output, and check if it is ours or not
var decoding_results_str = '<h4>Output decoding results</h4>';
var decoding_results_str = '<h3>Output decoding results</h3>';
decoding_results_str += '<table class="center">';
decoding_results_str += '<tr>' +
'<td></td>' +
'<td>output public key</td>' +
'<td>amount</td>' +
'<td>output match?</td>' +
'</tr>';
var output_idx = 0;
var sum_outptus = 0;
@ -257,57 +276,24 @@
output_idx++;
});
decoding_results_str += "</table>"
decoding_results_str += "</table>";
decoding_results_str += "<h3>Sum XMR from matched outputs (i.e., incoming XMR): " + (sum_outptus / 1e12) + "</h3>"
$("#decode-prove-results").html(decoding_results_str);
}
//decode amount and mask and check against commitment
// from https://xmr.llcoins.net/js/site.js
var H = "8b655970153799af2aeadc9ff1add0ea6c7251d54154cfa92c173a0dd39c1f94";
// from https://xmr.llcoins.net/js/site.js
function decodeRct(rv, i, der){
var key = derivation_to_scalar(der, i);
var ecdh = decode_rct_ecdh(rv.ecdhInfo[i], key);
//console.log(ecdh);
var Ctmp = commit(ecdh.amount, ecdh.mask);
//console.log(Ctmp);
if (Ctmp !== rv.outPk[i]){
throw "mismatched commitments!";
}
ecdh.amount = s2d(ecdh.amount);
return ecdh;
}
//creates a Pedersen commitment from an amount (in scalar form) and a mask
//C = bG + aH where b = mask, a = amount
// from https://xmr.llcoins.net/js/site.js
function commit(amount, mask){
if (!valid_hex(mask) || mask.length !== 64 || !valid_hex(amount) || amount.length !== 64){
throw "invalid amount or mask!";
// decrypt payment_id8 which results in using
// integrated address
if (payment_id.length == 16) {
if (pub_key) {
var decrypted_payment_id8
= decrypt_payment_id(payment_id, pub_key, sec_key);
console.log("decrypted_payment_id8: " + decrypted_payment_id8);
decoding_results_str += "<h5>Decrypted payment id: " + decrypted_payment_id8 + "</h5>"
}
var C = ge_double_scalarmult_base_vartime(amount, H, mask);
return C;
}
// // from https://xmr.llcoins.net/js/site.js
function s2d(scalar){
return JSBigInt.parse(swapEndian(scalar), 16).toString();
}
//switch byte order for hex string
// from https://xmr.llcoins.net/js/site.js
function swapEndian(hex){
if (hex.length % 2 !== 0){return "length must be a multiple of 2!";}
var data = "";
for (var i=1; i <= hex.length / 2; i++){
data += hex.substr(0 - 2 * i, 2);
}
return data;
$("#decode-prove-results").html(decoding_results_str);
}
</script>

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