sea.js
58.6 KB
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
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
;(function(){
/* UNBUILD */
function USE(arg, req){
return req? require(arg) : arg.slice? USE[R(arg)] : function(mod, path){
arg(mod = {exports: {}});
USE[R(path)] = mod.exports;
}
function R(p){
return p.split('/').slice(-1).toString().replace('.js','');
}
}
if(typeof module !== "undefined"){ var MODULE = module }
/* UNBUILD */
;USE(function(module){
// Security, Encryption, and Authorization: SEA.js
// MANDATORY READING: https://gun.eco/explainers/data/security.html
// IT IS IMPLEMENTED IN A POLYFILL/SHIM APPROACH.
// THIS IS AN EARLY ALPHA!
if(typeof window !== "undefined"){ module.window = window }
var tmp = module.window || module;
var SEA = tmp.SEA || {};
if(SEA.window = module.window){ SEA.window.SEA = SEA }
try{ if(typeof MODULE !== "undefined"){ MODULE.exports = SEA } }catch(e){}
module.exports = SEA;
})(USE, './root');
;USE(function(module){
var SEA = USE('./root');
try{ if(SEA.window){
if(location.protocol.indexOf('s') < 0
&& location.host.indexOf('localhost') < 0
&& location.protocol.indexOf('file:') < 0){
location.protocol = 'https:'; // WebCrypto does NOT work without HTTPS!
}
} }catch(e){}
})(USE, './https');
;USE(function(module){
if(typeof btoa === "undefined"){
if(typeof Buffer === "undefined") {
global.Buffer = require("buffer").Buffer
}
global.btoa = function (data) { return Buffer.from(data, "binary").toString("base64"); };
global.atob = function (data) { return Buffer.from(data, "base64").toString("binary"); };
}
})(USE, './base64');
;USE(function(module){
USE('./base64');
// This is Array extended to have .toString(['utf8'|'hex'|'base64'])
function SeaArray() {}
Object.assign(SeaArray, { from: Array.from })
SeaArray.prototype = Object.create(Array.prototype)
SeaArray.prototype.toString = function(enc, start, end) { enc = enc || 'utf8'; start = start || 0;
const length = this.length
if (enc === 'hex') {
const buf = new Uint8Array(this)
return [ ...Array(((end && (end + 1)) || length) - start).keys()]
.map((i) => buf[ i + start ].toString(16).padStart(2, '0')).join('')
}
if (enc === 'utf8') {
return Array.from(
{ length: (end || length) - start },
(_, i) => String.fromCharCode(this[ i + start])
).join('')
}
if (enc === 'base64') {
return btoa(this)
}
}
module.exports = SeaArray;
})(USE, './array');
;USE(function(module){
USE('./base64');
// This is Buffer implementation used in SEA. Functionality is mostly
// compatible with NodeJS 'safe-buffer' and is used for encoding conversions
// between binary and 'hex' | 'utf8' | 'base64'
// See documentation and validation for safe implementation in:
// https://github.com/feross/safe-buffer#update
var SeaArray = USE('./array');
function SafeBuffer(...props) {
console.warn('new SafeBuffer() is depreciated, please use SafeBuffer.from()')
return SafeBuffer.from(...props)
}
SafeBuffer.prototype = Object.create(Array.prototype)
Object.assign(SafeBuffer, {
// (data, enc) where typeof data === 'string' then enc === 'utf8'|'hex'|'base64'
from() {
if (!Object.keys(arguments).length || arguments[0]==null) {
throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
}
const input = arguments[0]
let buf
if (typeof input === 'string') {
const enc = arguments[1] || 'utf8'
if (enc === 'hex') {
const bytes = input.match(/([\da-fA-F]{2})/g)
.map((byte) => parseInt(byte, 16))
if (!bytes || !bytes.length) {
throw new TypeError('Invalid first argument for type \'hex\'.')
}
buf = SeaArray.from(bytes)
} else if (enc === 'utf8') {
const length = input.length
const words = new Uint16Array(length)
Array.from({ length: length }, (_, i) => words[i] = input.charCodeAt(i))
buf = SeaArray.from(words)
} else if (enc === 'base64') {
const dec = atob(input)
const length = dec.length
const bytes = new Uint8Array(length)
Array.from({ length: length }, (_, i) => bytes[i] = dec.charCodeAt(i))
buf = SeaArray.from(bytes)
} else if (enc === 'binary') {
buf = SeaArray.from(input)
} else {
console.info('SafeBuffer.from unknown encoding: '+enc)
}
return buf
}
const byteLength = input.byteLength // what is going on here? FOR MARTTI
const length = input.byteLength ? input.byteLength : input.length
if (length) {
let buf
if (input instanceof ArrayBuffer) {
buf = new Uint8Array(input)
}
return SeaArray.from(buf || input)
}
},
// This is 'safe-buffer.alloc' sans encoding support
alloc(length, fill = 0 /*, enc*/ ) {
return SeaArray.from(new Uint8Array(Array.from({ length: length }, () => fill)))
},
// This is normal UNSAFE 'buffer.alloc' or 'new Buffer(length)' - don't use!
allocUnsafe(length) {
return SeaArray.from(new Uint8Array(Array.from({ length : length })))
},
// This puts together array of array like members
concat(arr) { // octet array
if (!Array.isArray(arr)) {
throw new TypeError('First argument must be Array containing ArrayBuffer or Uint8Array instances.')
}
return SeaArray.from(arr.reduce((ret, item) => ret.concat(Array.from(item)), []))
}
})
SafeBuffer.prototype.from = SafeBuffer.from
SafeBuffer.prototype.toString = SeaArray.prototype.toString
module.exports = SafeBuffer;
})(USE, './buffer');
;USE(function(module){
const SEA = USE('./root')
const Buffer = USE('./buffer')
const api = {Buffer: Buffer}
var o = {};
if(SEA.window){
api.crypto = navigator && navigator.product === 'ReactNative' ? require('isomorphic-webcrypto') : window.crypto || window.msCrypto || require('isomorphic-webcrypto');
api.subtle = (api.crypto||o).subtle || (api.crypto||o).webkitSubtle;
api.TextEncoder = window.TextEncoder;
api.TextDecoder = window.TextDecoder;
api.random = (len) => Buffer.from(api.crypto.getRandomValues(new Uint8Array(Buffer.alloc(len))));
}
if(!api.TextDecoder)
{
const { TextEncoder, TextDecoder } = require('text-encoding');
api.TextDecoder = TextDecoder;
api.TextEncoder = TextEncoder;
}
if(!api.crypto){try{
var crypto = USE('crypto', 1);
Object.assign(api, {
crypto,
random: (len) => Buffer.from(crypto.randomBytes(len))
});
const isocrypto = require('isomorphic-webcrypto');
api.ossl = api.subtle = isocrypto.subtle;
}catch(e){
console.log("text-encoding and @peculiar/webcrypto may not be included by default, please add it to your package.json!");
TEXT_ENCODING_OR_PECULIAR_WEBCRYPTO_NOT_INSTALLED;
}}
module.exports = api
})(USE, './shim');
;USE(function(module){
var SEA = USE('./root');
var Buffer = USE('./buffer');
var s = {};
s.pbkdf2 = {hash: {name : 'SHA-256'}, iter: 100000, ks: 64};
s.ecdsa = {
pair: {name: 'ECDSA', namedCurve: 'P-256'},
sign: {name: 'ECDSA', hash: {name: 'SHA-256'}}
};
s.ecdh = {name: 'ECDH', namedCurve: 'P-256'};
// This creates Web Cryptography API compliant JWK for sign/verify purposes
s.jwk = function(pub, d){ // d === priv
pub = pub.split('.');
var x = pub[0], y = pub[1];
var jwk = {kty: "EC", crv: "P-256", x: x, y: y, ext: true};
jwk.key_ops = d ? ['sign'] : ['verify'];
if(d){ jwk.d = d }
return jwk;
};
s.keyToJwk = function(keyBytes) {
const keyB64 = keyBytes.toString('base64');
const k = keyB64.replace(/\+/g, '-').replace(/\//g, '_').replace(/\=/g, '');
return { kty: 'oct', k: k, ext: false, alg: 'A256GCM' };
}
s.recall = {
validity: 12 * 60 * 60, // internally in seconds : 12 hours
hook: function(props){ return props } // { iat, exp, alias, remember } // or return new Promise((resolve, reject) => resolve(props)
};
s.check = function(t){ return (typeof t == 'string') && ('SEA{' === t.slice(0,4)) }
s.parse = function p(t){ try {
var yes = (typeof t == 'string');
if(yes && 'SEA{' === t.slice(0,4)){ t = t.slice(3) }
return yes ? JSON.parse(t) : t;
} catch (e) {}
return t;
}
SEA.opt = s;
module.exports = s
})(USE, './settings');
;USE(function(module){
var shim = USE('./shim');
module.exports = async function(d, o){
var t = (typeof d == 'string')? d : JSON.stringify(d);
var hash = await shim.subtle.digest({name: o||'SHA-256'}, new shim.TextEncoder().encode(t));
return shim.Buffer.from(hash);
}
})(USE, './sha256');
;USE(function(module){
// This internal func returns SHA-1 hashed data for KeyID generation
const __shim = USE('./shim')
const subtle = __shim.subtle
const ossl = __shim.ossl ? __shim.ossl : subtle
const sha1hash = (b) => ossl.digest({name: 'SHA-1'}, new ArrayBuffer(b))
module.exports = sha1hash
})(USE, './sha1');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var sha = USE('./sha256');
var u;
SEA.work = SEA.work || (async (data, pair, cb, opt) => { try { // used to be named `proof`
var salt = (pair||{}).epub || pair; // epub not recommended, salt should be random!
var opt = opt || {};
if(salt instanceof Function){
cb = salt;
salt = u;
}
data = (typeof data == 'string')? data : JSON.stringify(data);
if('sha' === (opt.name||'').toLowerCase().slice(0,3)){
var rsha = shim.Buffer.from(await sha(data, opt.name), 'binary').toString(opt.encode || 'base64')
if(cb){ try{ cb(rsha) }catch(e){console.log(e)} }
return rsha;
}
salt = salt || shim.random(9);
var key = await (shim.ossl || shim.subtle).importKey('raw', new shim.TextEncoder().encode(data), {name: opt.name || 'PBKDF2'}, false, ['deriveBits']);
var work = await (shim.ossl || shim.subtle).deriveBits({
name: opt.name || 'PBKDF2',
iterations: opt.iterations || S.pbkdf2.iter,
salt: new shim.TextEncoder().encode(opt.salt || salt),
hash: opt.hash || S.pbkdf2.hash,
}, key, opt.length || (S.pbkdf2.ks * 8))
data = shim.random(data.length) // Erase data in case of passphrase
var r = shim.Buffer.from(work, 'binary').toString(opt.encode || 'base64')
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
module.exports = SEA.work;
})(USE, './work');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
SEA.name = SEA.name || (async (cb, opt) => { try {
if(cb){ try{ cb() }catch(e){console.log(e)} }
return;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
//SEA.pair = async (data, proof, cb) => { try {
SEA.pair = SEA.pair || (async (cb, opt) => { try {
var ecdhSubtle = shim.ossl || shim.subtle;
// First: ECDSA keys for signing/verifying...
var sa = await shim.subtle.generateKey({name: 'ECDSA', namedCurve: 'P-256'}, true, [ 'sign', 'verify' ])
.then(async (keys) => {
// privateKey scope doesn't leak out from here!
//const { d: priv } = await shim.subtle.exportKey('jwk', keys.privateKey)
var key = {};
key.priv = (await shim.subtle.exportKey('jwk', keys.privateKey)).d;
var pub = await shim.subtle.exportKey('jwk', keys.publicKey);
//const pub = Buff.from([ x, y ].join(':')).toString('base64') // old
key.pub = pub.x+'.'+pub.y; // new
// x and y are already base64
// pub is UTF8 but filename/URL safe (https://www.ietf.org/rfc/rfc3986.txt)
// but split on a non-base64 letter.
return key;
})
// To include PGPv4 kind of keyId:
// const pubId = await SEA.keyid(keys.pub)
// Next: ECDH keys for encryption/decryption...
try{
var dh = await ecdhSubtle.generateKey({name: 'ECDH', namedCurve: 'P-256'}, true, ['deriveKey'])
.then(async (keys) => {
// privateKey scope doesn't leak out from here!
var key = {};
key.epriv = (await ecdhSubtle.exportKey('jwk', keys.privateKey)).d;
var pub = await ecdhSubtle.exportKey('jwk', keys.publicKey);
//const epub = Buff.from([ ex, ey ].join(':')).toString('base64') // old
key.epub = pub.x+'.'+pub.y; // new
// ex and ey are already base64
// epub is UTF8 but filename/URL safe (https://www.ietf.org/rfc/rfc3986.txt)
// but split on a non-base64 letter.
return key;
})
}catch(e){
if(SEA.window){ throw e }
if(e == 'Error: ECDH is not a supported algorithm'){ console.log('Ignoring ECDH...') }
else { throw e }
} dh = dh || {};
var r = { pub: sa.pub, priv: sa.priv, /* pubId, */ epub: dh.epub, epriv: dh.epriv }
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
module.exports = SEA.pair;
})(USE, './pair');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var sha = USE('./sha256');
var u;
SEA.sign = SEA.sign || (async (data, pair, cb, opt) => { try {
opt = opt || {};
if(!(pair||opt).priv){
pair = await SEA.I(null, {what: data, how: 'sign', why: opt.why});
}
if(u === data){ throw '`undefined` not allowed.' }
var json = S.parse(data);
var check = opt.check = opt.check || json;
if(SEA.verify && (SEA.opt.check(check) || (check && check.s && check.m))
&& u !== await SEA.verify(check, pair)){ // don't sign if we already signed it.
var r = S.parse(check);
if(!opt.raw){ r = 'SEA'+JSON.stringify(r) }
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
}
var pub = pair.pub;
var priv = pair.priv;
var jwk = S.jwk(pub, priv);
var hash = await sha(json);
var sig = await (shim.ossl || shim.subtle).importKey('jwk', jwk, {name: 'ECDSA', namedCurve: 'P-256'}, false, ['sign'])
.then((key) => (shim.ossl || shim.subtle).sign({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, new Uint8Array(hash))) // privateKey scope doesn't leak out from here!
var r = {m: json, s: shim.Buffer.from(sig, 'binary').toString(opt.encode || 'base64')}
if(!opt.raw){ r = 'SEA'+JSON.stringify(r) }
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
module.exports = SEA.sign;
})(USE, './sign');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var sha = USE('./sha256');
var u;
SEA.verify = SEA.verify || (async (data, pair, cb, opt) => { try {
var json = S.parse(data);
if(false === pair){ // don't verify!
var raw = S.parse(json.m);
if(cb){ try{ cb(raw) }catch(e){console.log(e)} }
return raw;
}
opt = opt || {};
// SEA.I // verify is free! Requires no user permission.
var pub = pair.pub || pair;
var key = SEA.opt.slow_leak? await SEA.opt.slow_leak(pub) : await (shim.ossl || shim.subtle).importKey('jwk', S.jwk(pub), {name: 'ECDSA', namedCurve: 'P-256'}, false, ['verify']);
var hash = await sha(json.m);
var buf, sig, check, tmp; try{
buf = shim.Buffer.from(json.s, opt.encode || 'base64'); // NEW DEFAULT!
sig = new Uint8Array(buf);
check = await (shim.ossl || shim.subtle).verify({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, sig, new Uint8Array(hash));
if(!check){ throw "Signature did not match." }
}catch(e){
if(SEA.opt.fallback){
return await SEA.opt.fall_verify(data, pair, cb, opt);
}
}
var r = check? S.parse(json.m) : u;
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e); // mismatched owner FOR MARTTI
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
module.exports = SEA.verify;
// legacy & ossl leak mitigation:
var knownKeys = {};
var keyForPair = SEA.opt.slow_leak = pair => {
if (knownKeys[pair]) return knownKeys[pair];
var jwk = S.jwk(pair);
knownKeys[pair] = (shim.ossl || shim.subtle).importKey("jwk", jwk, {name: 'ECDSA', namedCurve: 'P-256'}, false, ["verify"]);
return knownKeys[pair];
};
var O = SEA.opt;
SEA.opt.fall_verify = async function(data, pair, cb, opt, f){
if(f === SEA.opt.fallback){ throw "Signature did not match" } f = f || 1;
var tmp = data||'';
data = SEA.opt.unpack(data) || data;
var json = S.parse(data), pub = pair.pub || pair, key = await SEA.opt.slow_leak(pub);
var hash = (f <= SEA.opt.fallback)? shim.Buffer.from(await shim.subtle.digest({name: 'SHA-256'}, new shim.TextEncoder().encode(S.parse(json.m)))) : await sha(json.m); // this line is old bad buggy code but necessary for old compatibility.
var buf; var sig; var check; try{
buf = shim.Buffer.from(json.s, opt.encode || 'base64') // NEW DEFAULT!
sig = new Uint8Array(buf)
check = await (shim.ossl || shim.subtle).verify({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, sig, new Uint8Array(hash))
if(!check){ throw "Signature did not match." }
}catch(e){
buf = shim.Buffer.from(json.s, 'utf8') // AUTO BACKWARD OLD UTF8 DATA!
sig = new Uint8Array(buf)
check = await (shim.ossl || shim.subtle).verify({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, sig, new Uint8Array(hash))
if(!check){ throw "Signature did not match." }
}
var r = check? S.parse(json.m) : u;
O.fall_soul = tmp['#']; O.fall_key = tmp['.']; O.fall_val = data; O.fall_state = tmp['>'];
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
}
SEA.opt.fallback = 2;
})(USE, './verify');
;USE(function(module){
var shim = USE('./shim');
var S = USE('./settings');
var sha256hash = USE('./sha256');
const importGen = async (key, salt, opt) => {
//const combo = shim.Buffer.concat([shim.Buffer.from(key, 'utf8'), salt || shim.random(8)]).toString('utf8') // old
var opt = opt || {};
const combo = key + (salt || shim.random(8)).toString('utf8'); // new
const hash = shim.Buffer.from(await sha256hash(combo), 'binary')
const jwkKey = S.keyToJwk(hash)
return await shim.subtle.importKey('jwk', jwkKey, {name:'AES-GCM'}, false, ['encrypt', 'decrypt'])
}
module.exports = importGen;
})(USE, './aeskey');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var aeskey = USE('./aeskey');
var u;
SEA.encrypt = SEA.encrypt || (async (data, pair, cb, opt) => { try {
opt = opt || {};
var key = (pair||opt).epriv || pair;
if(u === data){ throw '`undefined` not allowed.' }
if(!key){
pair = await SEA.I(null, {what: data, how: 'encrypt', why: opt.why});
key = pair.epriv || pair;
}
var msg = (typeof data == 'string')? data : JSON.stringify(data);
var rand = {s: shim.random(9), iv: shim.random(15)}; // consider making this 9 and 15 or 18 or 12 to reduce == padding.
var ct = await aeskey(key, rand.s, opt).then((aes) => (/*shim.ossl ||*/ shim.subtle).encrypt({ // Keeping the AES key scope as private as possible...
name: opt.name || 'AES-GCM', iv: new Uint8Array(rand.iv)
}, aes, new shim.TextEncoder().encode(msg)));
var r = {
ct: shim.Buffer.from(ct, 'binary').toString(opt.encode || 'base64'),
iv: rand.iv.toString(opt.encode || 'base64'),
s: rand.s.toString(opt.encode || 'base64')
}
if(!opt.raw){ r = 'SEA'+JSON.stringify(r) }
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
module.exports = SEA.encrypt;
})(USE, './encrypt');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var aeskey = USE('./aeskey');
SEA.decrypt = SEA.decrypt || (async (data, pair, cb, opt) => { try {
opt = opt || {};
var key = (pair||opt).epriv || pair;
if(!key){
pair = await SEA.I(null, {what: data, how: 'decrypt', why: opt.why});
key = pair.epriv || pair;
}
var json = S.parse(data);
var buf, bufiv, bufct; try{
buf = shim.Buffer.from(json.s, opt.encode || 'base64');
bufiv = shim.Buffer.from(json.iv, opt.encode || 'base64');
bufct = shim.Buffer.from(json.ct, opt.encode || 'base64');
var ct = await aeskey(key, buf, opt).then((aes) => (/*shim.ossl ||*/ shim.subtle).decrypt({ // Keeping aesKey scope as private as possible...
name: opt.name || 'AES-GCM', iv: new Uint8Array(bufiv), tagLength: 128
}, aes, new Uint8Array(bufct)));
}catch(e){
if('utf8' === opt.encode){ throw "Could not decrypt" }
if(SEA.opt.fallback){
opt.encode = 'utf8';
return await SEA.decrypt(data, pair, cb, opt);
}
}
var r = S.parse(new shim.TextDecoder('utf8').decode(ct));
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
module.exports = SEA.decrypt;
})(USE, './decrypt');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
// Derive shared secret from other's pub and my epub/epriv
SEA.secret = SEA.secret || (async (key, pair, cb, opt) => { try {
opt = opt || {};
if(!pair || !pair.epriv || !pair.epub){
pair = await SEA.I(null, {what: key, how: 'secret', why: opt.why});
}
var pub = key.epub || key;
var epub = pair.epub;
var epriv = pair.epriv;
var ecdhSubtle = shim.ossl || shim.subtle;
var pubKeyData = keysToEcdhJwk(pub);
var props = Object.assign({ public: await ecdhSubtle.importKey(...pubKeyData, true, []) },{name: 'ECDH', namedCurve: 'P-256'}); // Thanks to @sirpy !
var privKeyData = keysToEcdhJwk(epub, epriv);
var derived = await ecdhSubtle.importKey(...privKeyData, false, ['deriveBits']).then(async (privKey) => {
// privateKey scope doesn't leak out from here!
var derivedBits = await ecdhSubtle.deriveBits(props, privKey, 256);
var rawBits = new Uint8Array(derivedBits);
var derivedKey = await ecdhSubtle.importKey('raw', rawBits,{ name: 'AES-GCM', length: 256 }, true, [ 'encrypt', 'decrypt' ]);
return ecdhSubtle.exportKey('jwk', derivedKey).then(({ k }) => k);
})
var r = derived;
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
console.log(e);
SEA.err = e;
if(SEA.throw){ throw e }
if(cb){ cb() }
return;
}});
// can this be replaced with settings.jwk?
var keysToEcdhJwk = (pub, d) => { // d === priv
//var [ x, y ] = Buffer.from(pub, 'base64').toString('utf8').split(':') // old
var [ x, y ] = pub.split('.') // new
var jwk = d ? { d: d } : {}
return [ // Use with spread returned value...
'jwk',
Object.assign(
jwk,
{ x: x, y: y, kty: 'EC', crv: 'P-256', ext: true }
), // ??? refactor
{name: 'ECDH', namedCurve: 'P-256'}
]
}
module.exports = SEA.secret;
})(USE, './secret');
;USE(function(module){
var shim = USE('./shim');
// Practical examples about usage found in tests.
var SEA = USE('./root');
SEA.work = USE('./work');
SEA.sign = USE('./sign');
SEA.verify = USE('./verify');
SEA.encrypt = USE('./encrypt');
SEA.decrypt = USE('./decrypt');
SEA.opt.aeskey = USE('./aeskey'); // not official!
SEA.random = SEA.random || shim.random;
// This is Buffer used in SEA and usable from Gun/SEA application also.
// For documentation see https://nodejs.org/api/buffer.html
SEA.Buffer = SEA.Buffer || USE('./buffer');
// These SEA functions support now ony Promises or
// async/await (compatible) code, use those like Promises.
//
// Creates a wrapper library around Web Crypto API
// for various AES, ECDSA, PBKDF2 functions we called above.
// Calculate public key KeyID aka PGPv4 (result: 8 bytes as hex string)
SEA.keyid = SEA.keyid || (async (pub) => {
try {
// base64('base64(x):base64(y)') => Buffer(xy)
const pb = Buffer.concat(
pub.replace(/-/g, '+').replace(/_/g, '/').split('.')
.map((t) => Buffer.from(t, 'base64'))
)
// id is PGPv4 compliant raw key
const id = Buffer.concat([
Buffer.from([0x99, pb.length / 0x100, pb.length % 0x100]), pb
])
const sha1 = await sha1hash(id)
const hash = Buffer.from(sha1, 'binary')
return hash.toString('hex', hash.length - 8) // 16-bit ID as hex
} catch (e) {
console.log(e)
throw e
}
});
// all done!
// Obviously it is missing MANY necessary features. This is only an alpha release.
// Please experiment with it, audit what I've done so far, and complain about what needs to be added.
// SEA should be a full suite that is easy and seamless to use.
// Again, scroll naer the top, where I provide an EXAMPLE of how to create a user and sign in.
// Once logged in, the rest of the code you just read handled automatically signing/validating data.
// But all other behavior needs to be equally easy, like opinionated ways of
// Adding friends (trusted public keys), sending private messages, etc.
// Cheers! Tell me what you think.
var Gun = (SEA.window||{}).Gun || USE((typeof MODULE == "undefined"?'.':'')+'./gun', 1);
Gun.SEA = SEA;
SEA.GUN = SEA.Gun = Gun;
module.exports = SEA
})(USE, './sea');
;USE(function(module){
var Gun = USE('./sea').Gun;
Gun.chain.then = function(cb){
var gun = this, p = (new Promise(function(res, rej){
gun.once(res);
}));
return cb? p.then(cb) : p;
}
})(USE, './then');
;USE(function(module){
var SEA = USE('./sea');
var Gun = SEA.Gun;
var then = USE('./then');
function User(root){
this._ = {$: this};
}
User.prototype = (function(){ function F(){}; F.prototype = Gun.chain; return new F() }()) // Object.create polyfill
User.prototype.constructor = User;
// let's extend the gun chain with a `user` function.
// only one user can be logged in at a time, per gun instance.
Gun.chain.user = function(pub){
var gun = this, root = gun.back(-1), user;
if(pub){ return root.get('~'+pub) }
if(user = root.back('user')){ return user }
var root = (root._), at = root, uuid = at.opt.uuid || Gun.state.lex;
(at = (user = at.user = gun.chain(new User))._).opt = {};
at.opt.uuid = function(cb){
var id = uuid(), pub = root.user;
if(!pub || !(pub = pub.is) || !(pub = pub.pub)){ return id }
id = id + '~' + pub + '/';
if(cb && cb.call){ cb(null, id) }
return id;
}
return user;
}
Gun.User = User;
module.exports = User;
})(USE, './user');
;USE(function(module){
// TODO: This needs to be split into all separate functions.
// Not just everything thrown into 'create'.
var SEA = USE('./sea');
var User = USE('./user');
var authsettings = USE('./settings');
var Gun = SEA.Gun;
var noop = function(){};
// Well first we have to actually create a user. That is what this function does.
User.prototype.create = function(alias, pass, cb, opt){
var gun = this, cat = (gun._), root = gun.back(-1);
cb = cb || noop;
if(cat.ing){
cb({err: Gun.log("User is already being created or authenticated!"), wait: true});
return gun;
}
cat.ing = true;
opt = opt || {};
var act = {}, u;
act.a = function(pubs){
act.pubs = pubs;
if(pubs && !opt.already){
// If we can enforce that a user name is already taken, it might be nice to try, but this is not guaranteed.
var ack = {err: Gun.log('User already created!')};
cat.ing = false;
cb(ack);
gun.leave();
return;
}
act.salt = Gun.text.random(64); // pseudo-randomly create a salt, then use PBKDF2 function to extend the password with it.
SEA.work(pass, act.salt, act.b); // this will take some short amount of time to produce a proof, which slows brute force attacks.
}
act.b = function(proof){
act.proof = proof;
SEA.pair(act.c); // now we have generated a brand new ECDSA key pair for the user account.
}
act.c = function(pair){ var tmp;
act.pair = pair || {};
if(tmp = cat.root.user){
tmp._.sea = pair;
tmp.is = {pub: pair.pub, epub: pair.epub, alias: alias};
}
// the user's public key doesn't need to be signed. But everything else needs to be signed with it! // we have now automated it! clean up these extra steps now!
act.data = {pub: pair.pub};
act.d();
}
act.d = function(){
act.data.alias = alias;
act.e();
}
act.e = function(){
act.data.epub = act.pair.epub;
SEA.encrypt({priv: act.pair.priv, epriv: act.pair.epriv}, act.proof, act.f, {raw:1}); // to keep the private key safe, we AES encrypt it with the proof of work!
}
act.f = function(auth){
act.data.auth = JSON.stringify({ek: auth, s: act.salt});
act.g(act.data.auth);
}
act.g = function(auth){ var tmp;
act.data.auth = act.data.auth || auth;
root.get(tmp = '~'+act.pair.pub).put(act.data); // awesome, now we can actually save the user with their public key as their ID.
root.get('~@'+alias).put(Gun.obj.put({}, tmp, Gun.val.link.ify(tmp))); // next up, we want to associate the alias with the public key. So we add it to the alias list.
setTimeout(function(){ // we should be able to delete this now, right?
cat.ing = false;
cb({ok: 0, pub: act.pair.pub}); // callback that the user has been created. (Note: ok = 0 because we didn't wait for disk to ack)
if(noop === cb){ gun.auth(alias, pass) } // if no callback is passed, auto-login after signing up.
},10);
}
root.get('~@'+alias).once(act.a);
return gun;
}
// now that we have created a user, we want to authenticate them!
User.prototype.auth = function(alias, pass, cb, opt){
var gun = this, cat = (gun._), root = gun.back(-1);
cb = cb || function(){};
if(cat.ing){
cb({err: Gun.log("User is already being created or authenticated!"), wait: true});
return gun;
}
cat.ing = true;
opt = opt || {};
var pair = (alias && (alias.pub || alias.epub))? alias : (pass && (pass.pub || pass.epub))? pass : null;
var act = {}, u;
act.a = function(data){
if(!data){ return act.b() }
if(!data.pub){
var tmp = [];
Gun.node.is(data, function(v){ tmp.push(v) })
return act.b(tmp);
}
if(act.name){ return act.f(data) }
act.c((act.data = data).auth);
}
act.b = function(list){
var get = (act.list = (act.list||[]).concat(list||[])).shift();
if(u === get){
if(act.name){ return act.err('Your user account is not published for dApps to access, please consider syncing it online, or allowing local access by adding your device as a peer.') }
return act.err('Wrong user or password.')
}
root.get(get).once(act.a);
}
act.c = function(auth){
if(u === auth){ return act.b() }
if(Gun.text.is(auth)){ return act.c(Gun.obj.ify(auth)) } // in case of legacy
SEA.work(pass, (act.auth = auth).s, act.d, act.enc); // the proof of work is evidence that we've spent some time/effort trying to log in, this slows brute force.
}
act.d = function(proof){
SEA.decrypt(act.auth.ek, proof, act.e, act.enc);
}
act.e = function(half){
if(u === half){
if(!act.enc){ // try old format
act.enc = {encode: 'utf8'};
return act.c(act.auth);
} act.enc = null; // end backwards
return act.b();
}
act.half = half;
act.f(act.data);
}
act.f = function(data){
if(!data || !data.pub){ return act.b() }
var tmp = act.half || {};
act.g({pub: data.pub, epub: data.epub, priv: tmp.priv, epriv: tmp.epriv});
}
act.g = function(pair){
act.pair = pair;
var user = (root._).user, at = (user._);
var tmp = at.tag;
var upt = at.opt;
at = user._ = root.get('~'+pair.pub)._;
at.opt = upt;
// add our credentials in-memory only to our root user instance
user.is = {pub: pair.pub, epub: pair.epub, alias: alias};
at.sea = act.pair;
cat.ing = false;
try{if(pass && !Gun.obj.has(Gun.obj.ify(cat.root.graph['~'+pair.pub].auth), ':')){ opt.shuffle = opt.change = pass; } }catch(e){} // migrate UTF8 & Shuffle!
opt.change? act.z() : cb(at);
if(SEA.window && ((gun.back('user')._).opt||opt).remember){
// TODO: this needs to be modular.
try{var sS = {};
sS = window.sessionStorage;
sS.recall = true;
sS.alias = alias;
sS.tmp = pass;
}catch(e){}
}
try{
(root._).on('auth', at) // TODO: Deprecate this, emit on user instead! Update docs when you do.
//at.on('auth', at) // Arrgh, this doesn't work without event "merge" code, but "merge" code causes stack overflow and crashes after logging in & trying to write data.
}catch(e){
Gun.log("Your 'auth' callback crashed with:", e);
}
}
act.z = function(){
// password update so encrypt private key using new pwd + salt
act.salt = Gun.text.random(64); // pseudo-random
SEA.work(opt.change, act.salt, act.y);
}
act.y = function(proof){
SEA.encrypt({priv: act.pair.priv, epriv: act.pair.epriv}, proof, act.x, {raw:1});
}
act.x = function(auth){
act.w(JSON.stringify({ek: auth, s: act.salt}));
}
act.w = function(auth){
if(opt.shuffle){ // delete in future!
console.log('migrate core account from UTF8 & shuffle');
var tmp = Gun.obj.to(act.data);
Gun.obj.del(tmp, '_');
tmp.auth = auth;
root.get('~'+act.pair.pub).put(tmp);
} // end delete
root.get('~'+act.pair.pub).get('auth').put(auth, cb);
}
act.err = function(e){
var ack = {err: Gun.log(e || 'User cannot be found!')};
cat.ing = false;
cb(ack);
}
act.plugin = function(name){
if(!(act.name = name)){ return act.err() }
var tmp = [name];
if('~' !== name[0]){
tmp[1] = '~'+name;
tmp[2] = '~@'+name;
}
act.b(tmp);
}
if(pair){
act.g(pair);
} else
if(alias){
root.get('~@'+alias).once(act.a);
} else
if(!alias && !pass){
SEA.name(act.plugin);
}
return gun;
}
User.prototype.pair = function(){
console.log("user.pair() IS DEPRECATED AND WILL BE DELETED!!!");
var user = this;
if(!user.is){ return false }
return user._.sea;
}
User.prototype.leave = function(opt, cb){
var gun = this, user = (gun.back(-1)._).user;
if(user){
delete user.is;
delete user._.is;
delete user._.sea;
}
if(SEA.window){
try{var sS = {};
sS = window.sessionStorage;
delete sS.alias;
delete sS.tmp;
delete sS.recall;
}catch(e){};
}
return gun;
}
// If authenticated user wants to delete his/her account, let's support it!
User.prototype.delete = async function(alias, pass, cb){
console.log("user.delete() IS DEPRECATED AND WILL BE MOVED TO A MODULE!!!");
var gun = this, root = gun.back(-1), user = gun.back('user');
try {
user.auth(alias, pass, function(ack){
var pub = (user.is||{}).pub;
// Delete user data
user.map().once(function(){ this.put(null) });
// Wipe user data from memory
user.leave();
(cb || noop)({ok: 0});
});
} catch (e) {
Gun.log('User.delete failed! Error:', e);
}
return gun;
}
User.prototype.recall = function(opt, cb){
var gun = this, root = gun.back(-1), tmp;
opt = opt || {};
if(opt && opt.sessionStorage){
if(SEA.window){
try{var sS = {};
sS = window.sessionStorage;
if(sS){
(root._).opt.remember = true;
((gun.back('user')._).opt||opt).remember = true;
if(sS.recall || (sS.alias && sS.tmp)){
root.user().auth(sS.alias, sS.tmp, cb);
}
}
}catch(e){}
}
return gun;
}
/*
TODO: copy mhelander's expiry code back in.
Although, we should check with community,
should expiry be core or a plugin?
*/
return gun;
}
User.prototype.alive = async function(){
console.log("user.alive() IS DEPRECATED!!!");
const gunRoot = this.back(-1)
try {
// All is good. Should we do something more with actual recalled data?
await authRecall(gunRoot)
return gunRoot._.user._
} catch (e) {
const err = 'No session!'
Gun.log(err)
throw { err }
}
}
User.prototype.trust = async function(user){
// TODO: BUG!!! SEA `node` read listener needs to be async, which means core needs to be async too.
//gun.get('alice').get('age').trust(bob);
if (Gun.is(user)) {
user.get('pub').get((ctx, ev) => {
console.log(ctx, ev)
})
}
user.get('trust').get(path).put(theirPubkey);
// do a lookup on this gun chain directly (that gets bob's copy of the data)
// do a lookup on the metadata trust table for this path (that gets all the pubkeys allowed to write on this path)
// do a lookup on each of those pubKeys ON the path (to get the collab data "layers")
// THEN you perform Jachen's mix operation
// and return the result of that to...
}
User.prototype.grant = function(to, cb){
console.log("`.grant` API MAY BE DELETED OR CHANGED OR RENAMED, DO NOT USE!");
var gun = this, user = gun.back(-1).user(), pair = user._.sea, path = '';
gun.back(function(at){ if(at.is){ return } path += (at.get||'') });
(async function(){
var enc, sec = await user.get('grant').get(pair.pub).get(path).then();
sec = await SEA.decrypt(sec, pair);
if(!sec){
sec = SEA.random(16).toString();
enc = await SEA.encrypt(sec, pair);
user.get('grant').get(pair.pub).get(path).put(enc);
}
var pub = to.get('pub').then();
var epub = to.get('epub').then();
pub = await pub; epub = await epub;
var dh = await SEA.secret(epub, pair);
enc = await SEA.encrypt(sec, dh);
user.get('grant').get(pub).get(path).put(enc, cb);
}());
return gun;
}
User.prototype.secret = function(data, cb){
console.log("`.secret` API MAY BE DELETED OR CHANGED OR RENAMED, DO NOT USE!");
var gun = this, user = gun.back(-1).user(), pair = user.pair(), path = '';
gun.back(function(at){ if(at.is){ return } path += (at.get||'') });
(async function(){
var enc, sec = await user.get('trust').get(pair.pub).get(path).then();
sec = await SEA.decrypt(sec, pair);
if(!sec){
sec = SEA.random(16).toString();
enc = await SEA.encrypt(sec, pair);
user.get('trust').get(pair.pub).get(path).put(enc);
}
enc = await SEA.encrypt(data, sec);
gun.put(enc, cb);
}());
return gun;
}
module.exports = User
})(USE, './create');
;USE(function(module){
var SEA = USE('./sea')
var Gun = SEA.Gun;
// After we have a GUN extension to make user registration/login easy, we then need to handle everything else.
// We do this with a GUN adapter, we first listen to when a gun instance is created (and when its options change)
Gun.on('opt', function(at){
if(!at.sea){ // only add SEA once per instance, on the "at" context.
at.sea = {own: {}};
//at.on('in', security, at); // now listen to all input data, acting as a firewall.
//at.on('out', signature, at); // and output listeners, to encrypt outgoing data.
at.on('put', check, at);
}
this.to.next(at); // make sure to call the "next" middleware adapter.
});
// Alright, this next adapter gets run at the per node level in the graph database.
// This will let us verify that every property on a node has a value signed by a public key we trust.
// If the signature does not match, the data is just `undefined` so it doesn't get passed on.
// If it does match, then we transform the in-memory "view" of the data into its plain value (without the signature).
// Now NOTE! Some data is "system" data, not user data. Example: List of public keys, aliases, etc.
// This data is self-enforced (the value can only match its ID), but that is handled in the `security` function.
// From the self-enforced data, we can see all the edges in the graph that belong to a public key.
// Example: ~ASDF is the ID of a node with ASDF as its public key, signed alias and salt, and
// its encrypted private key, but it might also have other signed values on it like `profile = <ID>` edge.
// Using that directed edge's ID, we can then track (in memory) which IDs belong to which keys.
// Here is a problem: Multiple public keys can "claim" any node's ID, so this is dangerous!
// This means we should ONLY trust our "friends" (our key ring) public keys, not any ones.
// I have not yet added that to SEA yet in this alpha release. That is coming soon, but beware in the meanwhile!
function each(msg){ // TODO: Warning: Need to switch to `gun.on('node')`! Do not use `Gun.on('node'` in your apps!
// NOTE: THE SECURITY FUNCTION HAS ALREADY VERIFIED THE DATA!!!
// WE DO NOT NEED TO RE-VERIFY AGAIN, JUST TRANSFORM IT TO PLAINTEXT.
var to = this.to, vertex = (msg.$._).put, c = 0, d;
Gun.node.is(msg.put, function(val, key, node){
// only process if SEA formatted?
var tmp = Gun.obj.ify(val) || noop;
if(u !== tmp[':']){
node[key] = SEA.opt.unpack(tmp);
return;
}
if(!SEA.opt.check(val)){ return }
c++; // for each property on the node
SEA.verify(val, false, function(data){ c--; // false just extracts the plain data.
node[key] = SEA.opt.unpack(data, key, node);; // transform to plain value.
if(d && !c && (c = -1)){ to.next(msg) }
});
});
if((d = true) && !c){ to.next(msg) }
}
// signature handles data output, it is a proxy to the security function.
function signature(msg){
if((msg._||noop).user){
return this.to.next(msg);
}
var ctx = this.as;
(msg._||(msg._=function(){})).user = ctx.user;
security.call(this, msg);
}
var u;
function check(msg){ // REVISE / IMPROVE, NO NEED TO PASS MSG/EVE EACH SUB?
var eve = this, at = eve.as, put = msg.put, soul = put['#'], key = put['.'], val = put[':'], state = put['>'], id = msg['#'], tmp;
if(!soul || !key){ return }
if((msg._||'').faith && (at.opt||'').faith && 'function' == typeof msg._){
SEA.verify(SEA.opt.pack(put), false, function(data){ // this is synchronous if false
put['='] = SEA.opt.unpack(data);
eve.to.next(msg);
});
return
}
var no = function(why){ at.on('in', {'@': id, err: why}) };
//var no = function(why){ msg.ack(why) };
(msg._||'').DBG && ((msg._||'').DBG.c = +new Date);
if(0 <= soul.indexOf('<?')){ // special case for "do not sync data X old"
// 'a~pub.key/b<?9'
tmp = parseFloat(soul.split('<?')[1]||'');
if(tmp && (state < (Gun.state() - (tmp * 1000)))){ // sec to ms
(tmp = msg._) && (tmp = tmp.lot) && (tmp.more--); // THIS IS BAD CODE! It assumes GUN internals do something that will probably change in future, but hacking in now.
return; // omit!
}
}
if('~@' === soul){ // special case for shared system data, the list of aliases.
check.alias(eve, msg, val, key, soul, at, no); return;
}
if('~@' === soul.slice(0,2)){ // special case for shared system data, the list of public keys for an alias.
check.pubs(eve, msg, val, key, soul, at, no); return;
}
//if('~' === soul.slice(0,1) && 2 === (tmp = soul.slice(1)).split('.').length){ // special case, account data for a public key.
if(tmp = SEA.opt.pub(soul)){ // special case, account data for a public key.
check.pub(eve, msg, val, key, soul, at, no, at.user||'', tmp); return;
}
if(0 <= soul.indexOf('#')){ // special case for content addressing immutable hashed data.
check.hash(eve, msg, val, key, soul, at, no); return;
}
check.any(eve, msg, val, key, soul, at, no, at.user||''); return;
eve.to.next(msg); // not handled
}
check.hash = function(eve, msg, val, key, soul, at, no){
SEA.work(val, null, function(data){
if(data && data === key.split('#').slice(-1)[0]){ return eve.to.next(msg) }
no("Data hash not same as hash!");
}, {name: 'SHA-256'});
}
check.alias = function(eve, msg, val, key, soul, at, no){ // Example: {_:#~@, ~@alice: {#~@alice}}
if(!val){ return no("Data must exist!") } // data MUST exist
if('~@'+key === link_is(val)){ return eve.to.next(msg) } // in fact, it must be EXACTLY equal to itself
no("Alias not same!"); // if it isn't, reject.
};
check.pubs = function(eve, msg, val, key, soul, at, no){ // Example: {_:#~@alice, ~asdf: {#~asdf}}
if(!val){ return no("Alias must exist!") } // data MUST exist
if(key === link_is(val)){ return eve.to.next(msg) } // and the ID must be EXACTLY equal to its property
no("Alias not same!"); // that way nobody can tamper with the list of public keys.
};
check.pub = function(eve, msg, val, key, soul, at, no, user, pub){ var tmp; // Example: {_:#~asdf, hello:'world'~fdsa}}
if('pub' === key && '~'+pub === soul){
if(val === pub){ return eve.to.next(msg) } // the account MUST match `pub` property that equals the ID of the public key.
return no("Account not same!");
}
if((tmp = user.is) && pub === tmp.pub){
SEA.sign(SEA.opt.pack(msg.put), (user._).sea, function(data){
if(u === data){ return no(SEA.err || 'Signature fail.') }
if(tmp = link_is(val)){ (at.sea.own[tmp] = at.sea.own[tmp] || {})[pub] = 1 }
msg.put[':'] = JSON.stringify({':': tmp = SEA.opt.unpack(data.m), '~': data.s});
msg.put['='] = tmp;
eve.to.next(msg);
}, {raw: 1});
return;
}
SEA.verify(SEA.opt.pack(msg.put), pub, function(data){ var tmp;
data = SEA.opt.unpack(data);
if(u === data){ return no("Unverified data.") } // make sure the signature matches the account it claims to be on. // reject any updates that are signed with a mismatched account.
if((tmp = link_is(data)) && pub === SEA.opt.pub(tmp)){ (at.sea.own[tmp] = at.sea.own[tmp] || {})[pub] = 1 }
msg.put['='] = data;
eve.to.next(msg);
});
};
check.any = function(eve, msg, val, key, soul, at, no, user){ var tmp, pub;
if(at.opt.secure){ return no("Soul missing public key at '" + key + "'.") }
// TODO: Ask community if should auto-sign non user-graph data.
at.on('secure', function(msg){ this.off();
if(!at.opt.secure){ return eve.to.next(msg) }
no("Data cannot be changed.");
}).on.on('secure', msg);
return;
}
var link_is = Gun.val.link.is, state_ify = Gun.state.ify;
// okay! The security function handles all the heavy lifting.
// It needs to deal read and write of input and output of system data, account/public key data, and regular data.
// This is broken down into some pretty clear edge cases, let's go over them:
function security(msg){
var at = this.as, sea = at.sea, to = this.to;
if(at.opt.faith && (msg._||noop).faith){ // you probably shouldn't have faith in this!
this.to.next(msg); // why do we allow skipping security? I'm very scared about it actually.
return; // but so that way storage adapters that already verified something can get performance boost. This was a community requested feature. If anybody finds an exploit with it, please report immediately. It should only be exploitable if you have XSS control anyways, which if you do, you can bypass security regardless of this.
}
if(msg.get){
// if there is a request to read data from us, then...
var soul = msg.get['#'];
if(soul){ // for now, only allow direct IDs to be read.
if(typeof soul !== 'string'){ return to.next(msg) } // do not handle lexical cursors.
if('alias' === soul){ // Allow reading the list of usernames/aliases in the system?
return to.next(msg); // yes.
} else
if('~@' === soul.slice(0,2)){ // Allow reading the list of public keys associated with an alias?
return to.next(msg); // yes.
} else { // Allow reading everything?
return to.next(msg); // yes // TODO: No! Make this a callback/event that people can filter on.
}
}
}
if(msg.put){
/*
NOTICE: THIS IS OLD AND GETTING DEPRECATED.
ANY SECURITY CHANGES SHOULD HAPPEN ABOVE FIRST
THEN PORTED TO HERE.
*/
// potentially parallel async operations!!!
var check = {}, each = {}, u;
each.node = function(node, soul){
if(Gun.obj.empty(node, '_')){ return check['node'+soul] = 0 } // ignore empty updates, don't reject them.
Gun.obj.map(node, each.way, {soul: soul, node: node});
};
each.way = function(val, key){
var soul = this.soul, node = this.node, tmp;
if('_' === key){ return } // ignore meta data
if('~@' === soul){ // special case for shared system data, the list of aliases.
each.alias(val, key, node, soul); return;
}
if('~@' === soul.slice(0,2)){ // special case for shared system data, the list of public keys for an alias.
each.pubs(val, key, node, soul); return;
}
if('~' === soul.slice(0,1) && 2 === (tmp = soul.slice(1)).split('.').length){ // special case, account data for a public key.
each.pub(val, key, node, soul, tmp, (msg._||noop).user); return;
}
each.any(val, key, node, soul, (msg._||noop).user); return;
return each.end({err: "No other data allowed!"});
};
each.alias = function(val, key, node, soul){ // Example: {_:#~@, ~@alice: {#~@alice}}
if(!val){ return each.end({err: "Data must exist!"}) } // data MUST exist
if('~@'+key === Gun.val.link.is(val)){ return check['alias'+key] = 0 } // in fact, it must be EXACTLY equal to itself
each.end({err: "Mismatching alias."}); // if it isn't, reject.
};
each.pubs = function(val, key, node, soul){ // Example: {_:#~@alice, ~asdf: {#~asdf}}
if(!val){ return each.end({err: "Alias must exist!"}) } // data MUST exist
if(key === Gun.val.link.is(val)){ return check['pubs'+soul+key] = 0 } // and the ID must be EXACTLY equal to its property
each.end({err: "Alias must match!"}); // that way nobody can tamper with the list of public keys.
};
each.pub = function(val, key, node, soul, pub, user){ var tmp; // Example: {_:#~asdf, hello:'world'~fdsa}}
if('pub' === key){
if(val === pub){ return (check['pub'+soul+key] = 0) } // the account MUST match `pub` property that equals the ID of the public key.
return each.end({err: "Account must match!"});
}
check['user'+soul+key] = 1;
if(Gun.is(msg.$) && user && user.is && pub === user.is.pub){
SEA.sign(SEA.opt.prep(tmp = SEA.opt.parse(val), key, node, soul), (user._).sea, function(data){ var rel;
if(u === data){ return each.end({err: SEA.err || 'Pub signature fail.'}) }
if(rel = Gun.val.link.is(val)){
(at.sea.own[rel] = at.sea.own[rel] || {})[pub] = true;
}
node[key] = JSON.stringify({':': SEA.opt.unpack(data.m), '~': data.s});
check['user'+soul+key] = 0;
each.end({ok: 1});
}, {check: SEA.opt.pack(tmp, key, node, soul), raw: 1});
return;
}
SEA.verify(SEA.opt.pack(val,key,node,soul), pub, function(data){ var rel, tmp;
data = SEA.opt.unpack(data, key, node);
if(u === data){ // make sure the signature matches the account it claims to be on.
return each.end({err: "Unverified data."}); // reject any updates that are signed with a mismatched account.
}
if((rel = Gun.val.link.is(data)) && pub === SEA.opt.pub(rel)){
(at.sea.own[rel] = at.sea.own[rel] || {})[pub] = true;
}
check['user'+soul+key] = 0;
each.end({ok: 1});
});
};
each.any = function(val, key, node, soul, user){ var tmp, pub;
if(!(pub = SEA.opt.pub(soul))){
if(at.opt.secure){
each.end({err: "Soul is missing public key at '" + key + "'."});
return;
}
// TODO: Ask community if should auto-sign non user-graph data.
check['any'+soul+key] = 1;
at.on('secure', function(msg){ this.off();
check['any'+soul+key] = 0;
if(at.opt.secure){ msg = null }
each.end(msg || {err: "Data cannot be modified."});
}).on.on('secure', msg);
//each.end({err: "Data cannot be modified."});
return;
}
if(Gun.is(msg.$) && user && user.is && pub === user.is.pub){
/*var other = Gun.obj.map(at.sea.own[soul], function(v, p){
if((user.is||{}).pub !== p){ return p }
});
if(other){
each.any(val, key, node, soul);
return;
}*/
check['any'+soul+key] = 1;
SEA.sign(SEA.opt.prep(tmp = SEA.opt.parse(val), key, node, soul), (user._).sea, function(data){
if(u === data){ return each.end({err: 'My signature fail.'}) }
node[key] = JSON.stringify({':': SEA.opt.unpack(data.m), '~': data.s});
check['any'+soul+key] = 0;
each.end({ok: 1});
}, {check: SEA.opt.pack(tmp, key, node, soul), raw: 1});
return;
}
check['any'+soul+key] = 1;
SEA.verify(SEA.opt.pack(val,key,node,soul), pub, function(data){ var rel;
data = SEA.opt.unpack(data, key, node);
if(u === data){ return each.end({err: "Mismatched owner on '" + key + "'."}) } // thanks @rogowski !
if((rel = Gun.val.link.is(data)) && pub === SEA.opt.pub(rel)){
(at.sea.own[rel] = at.sea.own[rel] || {})[pub] = true;
}
check['any'+soul+key] = 0;
each.end({ok: 1});
});
}
each.end = function(ctx){ // TODO: Can't you just switch this to each.end = cb?
if(each.err){ return }
if((each.err = ctx.err) || ctx.no){
console.log('NO!', each.err, msg.put); // 451 mistmached data FOR MARTTI
return;
}
if(!each.end.ed){ return }
if(Gun.obj.map(check, function(no){
if(no){ return true }
})){ return }
(msg._||{}).user = at.user || security; // already been through firewall, does not need to again on out.
to.next(msg);
};
Gun.obj.map(msg.put, each.node);
each.end({end: each.end.ed = true});
return; // need to manually call next after async.
}
to.next(msg); // pass forward any data we do not know how to handle or process (this allows custom security protocols).
}
var pubcut = /[^\w_-]/; // anything not alphanumeric or _ -
SEA.opt.pub = function(s){
if(!s){ return }
s = s.split('~');
if(!s || !(s = s[1])){ return }
s = s.split(pubcut).slice(0,2);
if(!s || 2 != s.length){ return }
if('@' === (s[0]||'')[0]){ return }
s = s.slice(0,2).join('.');
return s;
}
SEA.opt.prep = function(d,k, n,s){ // prep for signing
return {'#':s,'.':k,':':SEA.opt.parse(d),'>':Gun.state.is(n, k)};
}
SEA.opt.pack = function(d,k, n,s){ // pack for verifying
if(SEA.opt.check(d)){ return d }
var meta = (Gun.obj.ify((d && d[':'])||d)||''), sig = meta['~'];
return sig? {m: {'#':s||d['#'],'.':k||d['.'],':':meta[':'],'>':d['>']||Gun.state.is(n, k)}, s: sig} : d;
}
var O = SEA.opt;
SEA.opt.unpack = function(d, k, n){ var tmp;
if(u === d){ return }
if(d && (u !== (tmp = d[':']))){ return tmp }
k = k || O.fall_key; if(!n && O.fall_val){ n = {}; n[k] = O.fall_val }
if(!k || !n){ return }
if(d === n[k]){ return d }
if(!SEA.opt.check(n[k])){ return d }
var soul = Gun.node.soul(n) || O.fall_soul, s = Gun.state.is(n, k) || O.fall_state;
if(d && 4 === d.length && soul === d[0] && k === d[1] && fl(s) === fl(d[3])){
return d[2];
}
if(s < SEA.opt.shuffle_attack){
return d;
}
}
SEA.opt.shuffle_attack = 1546329600000; // Jan 1, 2019
var noop = function(){}, u;
var fl = Math.floor; // TODO: Still need to fix inconsistent state issue.
var rel_is = Gun.val.rel.is;
var obj_ify = Gun.obj.ify;
// TODO: Potential bug? If pub/priv key starts with `-`? IDK how possible.
})(USE, './index');
}());