1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
|
<!DOCTYPE html>
<style>
img {
display: none
}
</style>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<label for=sec1>sec1 pubkey or directory entry: </label><input onchange=paypossible() placeholder="02ab83cc.../adrian" id=sec1>
<label for=amount>amount: </label><input onchange=paypossible() type=number min=0 max=4294967296 id=amount>
<br><label for=comment>comment:</label>
<br><textarea maxlength=256 style=width:100%;height:3cm placeholder="2023-06-18 21:06:40
kava v motorinu" id=comment></textarea>
<button onclick=paynow() disabled id=pay>pay</button>
<br><label for=directory>directory:</label>
<br><textarea id=directory style=width:100%;height:3cm placeholder="02ab82cd... anton
0384cc98... adrian
03ccdd99... oliver" onchange=savedir()></textarea>
<br><label for=computer>computer:</label> <input onchange=comp() id=computer placeholder="https://denar.sijanec.eu/api.php?m=" />
<button onclick=upload_transactions()>upload transactions</button>
<button onclick=localStorage.removeItem("last_sync_hash")>remove last sync hash</button>
<div id=log></div>
<label for=jwk>private jwk:</label>
<input onchange=login() placeholder='{"alg":"ES384","crv":"P-384","d":"' id=jwk />
<a href=gen.html>gen.html</a>
<br>my pubkey: <span id=sec1me></span>
<div id=reader style=width:100% ><button onclick=cam() >open camera</button></div>
<input type=checkbox id=allbal onchange=chkbox() checked disabled /><label for=allbal>show all <span id=balcnt></span> balances</label>
<div id=balances></div>
<input type=checkbox id=alltx onchange=chkbox() checked disabled /><label for=alltx>show all <span id=txscnt></span> txs</label>
<div id=txs></div>
<script>
async function try_import_tx (a) {
if (a.length != tx_len)
return false;
let tx = await parse_tx(a);
if (!tx)
return false;
if (!localStorage.getItem("transactions")) {
localStorage.setItem("transactions", a2hex(a));
return true;
}
let transactions = hex2a(localStorage.getItem("transactions"));
for (let j = 0; j < transactions.length/tx_len; j++) {
let oldtx = await parse_tx(transactions.slice(tx_len*j, tx_len*j+tx_len));
if (a2hex(oldtx.hash) == a2hex(tx.hash))
return false;
}
let new_transactions = new Uint8Array(transactions.length + tx_len);
new_transactions.set(transactions);
new_transactions.set(a, transactions.length);
transactions = new_transactions;
localStorage.setItem("transactions", a2hex(transactions));
return true;
}
function onscanfail (error) {
return;
}
function onscan (text, result) {
if (typeof(text) == "string" && text.startsWith("U")) {
text = text.slice(-x.length+1);
let a = new Uint8Array(text.length);
for (let i = 0; i < text.length; i++)
a[i] = text.charCodeAt(i)-32;
return onscan(a, result);
}
if (typeof(text) == "string" && text.startsWith("base64:")) // XXX untested
return onscan(Uint8Array.from(atob(text.split(":")[1]), c => c.charCodeAt(0)), result);
if (typeof(text) == "string" && text.startsWith('{') && text.includes("ES384") && text.includes("sign")) {
jwk.value = text;
localStorage.setItem("jwk", jwk.value);
return;
}
let a = new Uint8Array(text.length);
window.scanned = text;
for (let i = 0; i < text.length; i++)
a[i] = text.charCodeAt(i);
console.log("onscan: " + a2hex(a));
if (a[0] == 0) {
alert("standard private key qr codes are unsupported, use a jwk privkey qr code");
return;
}
if (a[0] == 1) {
let p = new Uint8Array(49);
for (let i = 0; i < 49; i++)
p[i] = a[1+i];
let t = new Uint8Array(a.length-50);
for (let i = 0; i < a.length-50; i++)
t[i] = a[50+i];
directory.value += a2hex(p) + " " + new TextDecoder().decode(t).split("\n")[0];
return;
}
if (a[0] == 2) {
let t = new Uint8Array(tx_len);
for (let i = 0; i < tx_len; i++)
t[i] = a[1+i];
if (!parse_tx(t)) {
alert("transaction couldn't be parsed or signature check failed");
return;
}
try_import_tx(t);
return;
}
if (a[0] == 3) {
let r = new Uint8Array(49);
for (let i = 0; i < 49; i++)
r[i] = a[1+i];
sec1.value = a2hex(p);
amount.value = a[49+1]*256*256*256 + a[49+2]*256*256 + a[49+3]*256 + a[49+4];
let t = new Uint8Array(a.length-54);
for (let i = 0; i < a.length-54; i++)
t[i] = a[54+i];
comment.value = new TextDecoder().decode(t);
return;
}
}
function cam () {
let qr = new Html5QrcodeScanner("reader", {fps: 10, qrbox: {width: 350, height: 350}}, false);
qr.render(onscan, onscanfail);
}
const hexchars = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"];
function a2hex (a) {
let r = "";
for (let i = 0; i < a.length; i++) {
r += hexchars[a[i] >> 4];
r += hexchars[a[i] % 16];
}
return r;
}
function singlehex (h) {
h = h.toLowerCase();
if (!hexchars.includes(h))
return null;
if (h.charCodeAt(0) >= "a".charCodeAt(0))
return 10 + h.charCodeAt(0) - "a".charCodeAt(0);
return h.charCodeAt(0) - "0".charCodeAt(0);
}
function hex2a (s) {
if (!s)
return null;
for (let i = 0; i < s.length; i++)
if (singlehex(s[i]) === null) {
return null;
}
let a = new Uint8Array(s.length/2);
for (let i = 0; i < s.length/2; i++)
a[i] = singlehex(s[2*i])*16 + singlehex(s[2*i+1]);
return a;
}
function xytosec1 (x, y) {
let r = new Uint8Array(49);
if (y[47] % 2)
r[0] = 3;
else
r[1] = 2;
for (let i = 0; i < 48; i++)
r[1+i] = x[i];
return r;
}
function sec1s_get (k) {
return hex2a(localStorage.getItem("sec1s_" + k));
}
function sec1s_set (k, v) {
console.log("sec1s_set: " + k);
if (k.slice(2, 2+48*2) == a2hex(v).slice(2, 2+48*2))
return localStorage.setItem("sec1s_" + k, a2hex(v));
}
var sec1s = {}; /// storage for Y derived from X by server
function pubkey_from_sec1uncompressed (a) {
if (a.length != 48*2+1)
return null;
return crypto.subtle.importKey("raw", a, {name: "ECDSA", namedCurve: "P-384"}, true, ["verify"]);
}
async function pubkey_from_sec1 (a) {
if (!a)
return null;
if (a[0] == 4)
return await pubkey_from_sec1uncompressed(a);
if (sec1s_get(a2hex(a)))
return await pubkey_from_sec1uncompressed(sec1s_get(a2hex(a)));
sec1s_set(a2hex(a), new Uint8Array(await (await fetch(computer.value + "sec1decompress", {method: "POST", body: a})).arrayBuffer()));
return await pubkey_from_sec1uncompressed(sec1s_get(a2hex(a)));
}
const tx_len = 49*2+4+256+32+48*2;
async function parse_tx (a /* uint8array */) { // also verifies
if (a.length < 49*2+4+256+32+48*2)
return null;
let r = {sender: null, recipient: null, amount: null, comment: null, nonce: null, r: null, s: null, hash: null, commentstr: null, senderkey: null, raw: a};
r.sender = a.slice(0, 49);
r.recipient = a.slice(49, 49+49);
r.amount = a[49*2]*256*256*256 + a[49*2+1]*256*256 + a[49*2+2]*256 + a[49*2+3];
r.comment = a.slice(49*2+4, 49*2+4+256);
r.nonce = a.slice(49*2+4+256, 49*2+4+256+32);
r.r = a.slice(49*2+4+256+32, 49*2+4+256+32+48);
r.s = a.slice(49*2+4+256+32+48);
r.commentstr = new TextDecoder().decode(r.comment);
r.senderkey = await pubkey_from_sec1(r.sender);
r.hash = new Uint8Array(await crypto.subtle.digest("SHA-256", a));
if (await crypto.subtle.verify({name: "ECDSA", hash: "SHA-384"}, r.senderkey, a.slice(-48*2), a.slice(0, tx_len-48*2)))
return r;
return false;
}
function upload_transactions () {
return fetch(computer.value + "transactions", {method: "POST", body: hex2a(localStorage.getItem("transactions"))});
/* let local_txs = hex2a(localStorage.getItem("transactions"));
let server_txs = await (await fetch(computer.value + "transactions")).arrayBuffer();
if (server_txs.length % tx_len) {
log.innerText += "server transactions response length modulo tx_len isn't zero!";
return;
}
let localtxs = [];
for (let i = 0; i < local_txs.length/tx_len; i++)
localtxs.push(local_txs.slice(tx_len*i, tx_len*i+tx_len));
for (let i = 0; i < server_txs.length/tx_len; i++) {
let remote_tx = local_txs.slice(tx_len*i, tx_len*i+tx_len);
while (localtxs.indexOf(remote_tx) !== -1)
localtxs.splice(localtxs.indexOf(remote_tx), 1);
}
localtxs.forEach(tx => {
fetch(computer.value + "transaction", {method: "POST", body: tx});
}); */
}
async function sync_transactions () {
let transactions = hex2a(localStorage.getItem("transactions"));
if (!transactions)
transactions = new Uint8Array(0);
let server_transactions = new Uint8Array(await (await fetch(computer.value + "transactions", {headers: {"After": localStorage.getItem("last_sync_hash")}})).arrayBuffer());
if (server_transactions.length % tx_len)
return;
let count = 0;
aLoop:
for (let i = 0; i < server_transactions.length/tx_len; i++)
if (await try_import_tx(server_transactions.slice(tx_len*i, tx_len*i+tx_len)))
count++;
if (server_transactions.length)
localStorage.setItem("last_sync_hash", a2hex(new Uint8Array(await crypto.subtle.digest("SHA-256", server_transactions.slice(-tx_len)))));
if (count)
rendertxsbal();
return count;
}
async function paynow () {
let sender = await sec1_from_pubkey(await pubkey_from_string("me"));
let rcpt = await sec1_from_pubkey(window.recipient);
let amount32 = new Uint8Array(4);
amount32[3] = amount.value % 256;
amount32[2] = (amount.value >> 8) % 256;
amount32[1] = (amount.value >> 16) % 256;
amount32[0] = (amount.value >> 24) % 256;
amount.value = "";
let comm = new TextEncoder().encode(comment.value);
let comm256 = new Uint8Array(256);
comm256[255] = 69; // user agent (nonstandard ofc)
for (let i = 0; i < 256; i++)
comm256[i] = comm[i];
nonce = crypto.getRandomValues(new Uint8Array(32));
let tx_unsigned = new Uint8Array(tx_len-2*48);
tx_unsigned.set(sender);
tx_unsigned.set(rcpt, sender.length);
tx_unsigned.set(amount32, sender.length+rcpt.length);
tx_unsigned.set(comm256, sender.length+rcpt.length+amount32.length);
tx_unsigned.set(nonce, sender.length+rcpt.length+amount32.length+comm256.length);
let signature = new Uint8Array(await crypto.subtle.sign({name: "ECDSA", hash: "SHA-384"}, key, tx_unsigned));
let tx_signed = new Uint8Array(tx_unsigned.length+signature.length);
tx_signed.set(tx_unsigned);
tx_signed.set(signature, tx_unsigned.length);
let transactions = hex2a(localStorage.getItem("transactions"));
let new_transactions = new Uint8Array((transactions ? transactions.length : 0) + tx_signed.length);
if (transactions)
new_transactions.set(transactions);
new_transactions.set(tx_signed, transactions ? transactions.length : 0);
localStorage.setItem("transactions", a2hex(new_transactions));
rendertxsbal();
upload_transactions();
}
function comp () {
if (!computer.value)
return;
if (localStorage.getItem("computer") != computer.value) {
localStorage.setItem("computer", computer.value);
localStorage.removeItem("last_sync_hash");
sync_transactions();
}
paypossible();
}
function sec1_compress (k) {
let r = new Uint8Array(49);
r[0] = 2;
if (k[48*2] % 2)
r[0] = 3;
for (let i = 0; i < 48; i++)
r[1+i] = k[1+i];
return r;
}
async function sec1_from_pubkey (k) {
return sec1_compress(new Uint8Array(await crypto.subtle.exportKey("raw", k)));
}
async function pubkey_from_string (s) {
if (s == "me")
return await pubkey_from_sec1(hex2a(sec1me.innerText));
if (await pubkey_from_sec1(hex2a(s))) {
return await pubkey_from_sec1(hex2a(s));
}
let d = directory.value.split("\n");
for (let i = 0; i < d.length; i++) {
if (d[i].includes(s)) {
return await pubkey_from_sec1(hex2a(d[i].split(" ")[0]));
}
}
return false;
}
async function paypossible () {
if (amount.value == "") {
console.log("paypossible: empty amount field");
pay.disabled = true;
return;
}
if (!(Number(amount.value) <= 4294967296 && Number(amount.value) >= 0)) {
console.log("paypossible: amount invalid");
pay.disabled = true;
return;
}
if (!key.usages.includes("sign")) {
console.log("paypossible: bad privkey");
pay.disabled = true;
return;
}
window.recipient = await pubkey_from_string(sec1.value);
if (recipient == false) {
console.log("paypossible: recipient pubkey bad");
pay.disabled = true;
return;
}
pay.disabled = false;
}
function resolvepubkey (a) {
if (a2hex(a) == sec1me.innerText)
return "me";
let d = directory.value.split("\n");
for (let i = 0; i < d.length; i++)
if (d[i].includes(a2hex(a).slice(-48*2)))
return d[i].split(" ").slice(1).join(" ");
return a2hex(a);
}
function draw_canvas (qr, scale, border, light, dark, canvas) {
canvas.width = canvas.height = (qr.size + border * 2) * scale;
let ctx = canvas.getContext("2d");
for (let y = -border; y < qr.size + border; y++) {
for (let x = -border; x < qr.size + border; x++) {
ctx.fillStyle = qr.getModule(x, y) ? dark : light;
ctx.fillRect((x + border) * scale, (y + border) * scale, scale, scale);
}
}
}
function txqr (seq, h) {
let a = hex2a(h);
let d = new Uint8Array(a.length+1);
d.set(a, 1)
d[0] = 2;
// draw_canvas(qrcodegen.QrCode.encodeBinary(d, qrcodegen.QrCode.Ecc.LOW), 5, 4, "#FFF", "#000", document.getElementById("cnv" + seq));
let s = "U";
for (let i = 0; i < d.length; i++)
s += String.fromCharCode(32+d[i]);
draw_canvas(qrcodegen.QrCode.encodeText(s, qrcodegen.QrCode.Ecc.LOW), 5, 4, "#FFF", "#000", document.getElementById("cnv" + seq));
document.getElementById("cnv" + seq).hidden = false;
document.getElementById("btn" + seq).hidden = true;
document.getElementById("br" + seq).hidden = false;
}
async function rendertxsbal () {
let transactions = hex2a(localStorage.getItem("transactions") ?? "");
if (!transactions) {
txs.innerHTML = "no transactions";
balances.innerHTML = "no transactions";
return;
}
let trans = [];
let balan = {};
for (let j = 0; j < transactions.length/tx_len; j++) {
let tx = await parse_tx(transactions.slice(tx_len*j, tx_len*j+tx_len));
trans.push(tx);
if (!Object.keys(balan).includes(resolvepubkey(tx.sender)))
balan[resolvepubkey(tx.sender)] = 0;
if (!Object.keys(balan).includes(resolvepubkey(tx.recipient)))
balan[resolvepubkey(tx.recipient)] = 0;
balan[resolvepubkey(tx.recipient)] += tx.amount;
balan[resolvepubkey(tx.sender)] -= tx.amount;
}
txscnt.innerText = trans.length;
txs.innerHTML = "";
let tx = null;
let seq = 0;
while (tx = trans.pop())
if (alltx.checked || resolvepubkey(tx.sender) == "me" || resolvepubkey(tx.recipient) == "me") {
txs.innerHTML += "<hr><canvas hidden='' id=cnv" + seq + "></canvas> <button id=btn" + seq + " onclick=txqr(" + seq + ",'" + a2hex(tx.raw) + "')>qr</button><br id=br" + seq + " hidden>sender: " + resolvepubkey(tx.sender) + "<br>recipient: " + resolvepubkey(tx.recipient) + "<br>amount: " + tx.amount + "<br>comment: " + tx.commentstr.replace("<", "<");
seq++;
}
balances.innerHTML = "";
Object.keys(balan).forEach(c => {
if (allbal.checked || c == "me")
balances.innerHTML += c + ": " + balan[c] + "<br>"
});
balcnt.innerText = Object.keys(balan).length;
}
async function chkbox () {
if (allbal.checked)
localStorage.setItem("allbal", "true");
else
localStorage.setItem("allbal", "false");
if (alltx.checked)
localStorage.setItem("alltx", "true");
else
localStorage.setItem("alltx", "false");
rendertxsbal();
}
async function login () {
localStorage.setItem("jwk", jwk.value);
window.key = await crypto.subtle.importKey("jwk", JSON.parse(jwk.value), {name: "ECDSA", namedCurve: "P-384"}, true, ["sign"]);
if (key.usages.includes("sign")) {
allbal.disabled = false;
alltx.disabled = false;
if (localStorage.getItem("alltx") == "true")
alltx.checked = true;
else
alltx.checked = false;
if (localStorage.getItem("allbal") == "true")
allbal.checked = true;
else
allbal.checked = false;
chkbox();
let mysec1 = new Uint8Array(49);
if (Uint8Array.from(atob(JSON.parse(jwk.value).y.replace(/-/g, "+").replace(/_/g, "/")), c => c.charCodeAt(0))[47] % 2)
mysec1[0] = 3;
else
mysec1[0] = 2;
for (let i = 0; i < 48; i++)
mysec1[1+i] = Uint8Array.from(atob(JSON.parse(jwk.value).x.replace(/-/g, "+").replace(/_/g, "/")), c => c.charCodeAt(0))[i];
sec1me.innerText = a2hex(mysec1);
} else {
console.log("login: privkey not ok");
sec1me.innerText = "";
allbal.disabled = true;
allbal.checked = true;
alltx.checked = true;
alltx.disabled = true;
}
paypossible();
}
function savedir () {
localStorage.setItem("directory", directory.value);
}
async function main () {
directory.value = localStorage.getItem("directory");
computer.value = localStorage.getItem("computer");
jwk.value = localStorage.getItem("jwk");
if (jwk.value != "")
await login();
await comp();
let push = false;
while (true) {
sync_transactions();
if (location.protocol == "file:" || !push)
await new Promise(r => setTimeout(r, 2000));
else {
let resp = await fetch(computer.value + "push", {method: "POST", body: hex2a(localStorage.getItem("last_sync_hash"))})
if (!resp.ok)
await new Promise(r => setTimeout(r, 2000));
}
}
rendertxsbal();
}
main();
</script>
<script src=QR-Code-generator/typescript-javascript/qrcodegen.js></script>
<script src=node_modules/html5-qrcode/html5-qrcode.min.js></script>
|
