-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path2fas-backup-viewer.html
184 lines (165 loc) · 26.8 KB
/
2fas-backup-viewer.html
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
<!--
Pure offline single HTML5 for viewing the QR Codes for each service in backup files exported from the 2FAS Authenticator app.
Copyright (C) 2024 Alex Ieong https://github.com/alexieong
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
-->
<!DOCTYPE html>
<html lang="en" style="font-family:Segoe UI,Roboto,Helvetica;line-height:1">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>2FAS Backup Viewer (202401010)</title>
<script type="text/javascript"> // QRCode.js https://github.com/KeeeX/qrcodejs
var QRCode;!function(){function t(t){this.mode=r.MODE_8BIT_BYTE,this.data=t,this.parsedData=[];for(var e=0,o=this.data.length;e<o;e++){var i=[],n=this.data.charCodeAt(e);n>65536?(i[0]=240|(1835008&n)>>>18,i[1]=128|(258048&n)>>>12,i[2]=128|(4032&n)>>>6,i[3]=128|63&n):n>2048?(i[0]=224|(61440&n)>>>12,i[1]=128|(4032&n)>>>6,i[2]=128|63&n):n>128?(i[0]=192|(1984&n)>>>6,i[1]=128|63&n):i[0]=n,this.parsedData.push(i)}this.parsedData=Array.prototype.concat.apply([],this.parsedData),this.parsedData.length!=this.data.length&&(this.parsedData.unshift(191),this.parsedData.unshift(187),this.parsedData.unshift(239))}function e(t,e){this.typeNumber=t,this.errorCorrectLevel=e,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}t.prototype={getLength:function(t){return this.parsedData.length},write:function(t){for(var e=0,r=this.parsedData.length;e<r;e++)t.put(this.parsedData[e],8)}},e.prototype={addData:function(e){var r=new t(e);this.dataList.push(r),this.dataCache=null},isDark:function(t,e){if(t<0||this.moduleCount<=t||e<0||this.moduleCount<=e)throw new Error(t+","+e);return this.modules[t][e]},getModuleCount:function(){return this.moduleCount},make:function(){this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(t,r){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var o=0;o<this.moduleCount;o++){this.modules[o]=new Array(this.moduleCount);for(var i=0;i<this.moduleCount;i++)this.modules[o][i]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(t,r),this.typeNumber>=7&&this.setupTypeNumber(t),null==this.dataCache&&(this.dataCache=e.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,r)},setupPositionProbePattern:function(t,e){for(var r=-1;r<=7;r++)if(!(t+r<=-1||this.moduleCount<=t+r))for(var o=-1;o<=7;o++)e+o<=-1||this.moduleCount<=e+o||(this.modules[t+r][e+o]=0<=r&&r<=6&&(0==o||6==o)||0<=o&&o<=6&&(0==r||6==r)||2<=r&&r<=4&&2<=o&&o<=4)},getBestMaskPattern:function(){for(var t=0,e=0,r=0;r<8;r++){this.makeImpl(!0,r);var o=g.getLostPoint(this);(0==r||t>o)&&(t=o,e=r)}return e},createMovieClip:function(t,e,r){var o=t.createEmptyMovieClip(e,r);this.make();for(var i=0;i<this.modules.length;i++)for(var n=1*i,a=0;a<this.modules[i].length;a++){var s=1*a;this.modules[i][a]&&(o.beginFill(0,100),o.moveTo(s,n),o.lineTo(s+1,n),o.lineTo(s+1,n+1),o.lineTo(s,n+1),o.endFill())}return o},setupTimingPattern:function(){for(var t=8;t<this.moduleCount-8;t++)null==this.modules[t][6]&&(this.modules[t][6]=t%2==0);for(var e=8;e<this.moduleCount-8;e++)null==this.modules[6][e]&&(this.modules[6][e]=e%2==0)},setupPositionAdjustPattern:function(){for(var t=g.getPatternPosition(this.typeNumber),e=0;e<t.length;e++)for(var r=0;r<t.length;r++){var o=t[e],i=t[r];if(null==this.modules[o][i])for(var n=-2;n<=2;n++)for(var a=-2;a<=2;a++)this.modules[o+n][i+a]=-2==n||2==n||-2==a||2==a||0==n&&0==a}},setupTypeNumber:function(t){for(var e=g.getBCHTypeNumber(this.typeNumber),r=0;r<18;r++){var o=!t&&1==(e>>r&1);this.modules[Math.floor(r/3)][r%3+this.moduleCount-8-3]=o}for(r=0;r<18;r++){o=!t&&1==(e>>r&1);this.modules[r%3+this.moduleCount-8-3][Math.floor(r/3)]=o}},setupTypeInfo:function(t,e){for(var r=this.errorCorrectLevel<<3|e,o=g.getBCHTypeInfo(r),i=0;i<15;i++){var n=!t&&1==(o>>i&1);i<6?this.modules[i][8]=n:i<8?this.modules[i+1][8]=n:this.modules[this.moduleCount-15+i][8]=n}for(i=0;i<15;i++){n=!t&&1==(o>>i&1);i<8?this.modules[8][this.moduleCount-i-1]=n:i<9?this.modules[8][15-i-1+1]=n:this.modules[8][15-i-1]=n}this.modules[this.moduleCount-8][8]=!t},mapData:function(t,e){for(var r=-1,o=this.moduleCount-1,i=7,n=0,a=this.moduleCount-1;a>0;a-=2)for(6==a&&a--;;){for(var s=0;s<2;s++)if(null==this.modules[o][a-s]){var h=!1;n<t.length&&(h=1==(t[n]>>>i&1)),g.getMask(e,o,a-s)&&(h=!h),this.modules[o][a-s]=h,-1==--i&&(n++,i=7)}if((o+=r)<0||this.moduleCount<=o){o-=r,r=-r;break}}}},e.PAD0=236,e.PAD1=17,e.createData=function(t,r,o){for(var i=m.getRSBlocks(t,r),n=new _,a=0;a<o.length;a++){var s=o[a];n.put(s.mode,4),n.put(s.getLength(),g.getLengthInBits(s.mode,t)),s.write(n)}var h=0;for(a=0;a<i.length;a++)h+=i[a].dataCount;if(n.getLengthInBits()>8*h)throw new Error("code length overflow. ("+n.getLengthInBits()+">"+8*h+")");for(n.getLengthInBits()+4<=8*h&&n.put(0,4);n.getLengthInBits()%8!=0;)n.putBit(!1);for(;!(n.getLengthInBits()>=8*h||(n.put(e.PAD0,8),n.getLengthInBits()>=8*h));)n.put(e.PAD1,8);return e.createBytes(n,i)},e.createBytes=function(t,e){for(var r=0,o=0,i=0,n=new Array(e.length),a=new Array(e.length),s=0;s<e.length;s++){var h=e[s].dataCount,l=e[s].totalCount-h;o=Math.max(o,h),i=Math.max(i,l),n[s]=new Array(h);for(var u=0;u<n[s].length;u++)n[s][u]=255&t.buffer[u+r];r+=h;var f=g.getErrorCorrectPolynomial(l),d=new p(n[s],f.getLength()-1).mod(f);a[s]=new Array(f.getLength()-1);for(u=0;u<a[s].length;u++){var c=u+d.getLength()-a[s].length;a[s][u]=c>=0?d.get(c):0}}var m=0;for(u=0;u<e.length;u++)m+=e[u].totalCount;var _=new Array(m),v=0;for(u=0;u<o;u++)for(s=0;s<e.length;s++)u<n[s].length&&(_[v++]=n[s][u]);for(u=0;u<i;u++)for(s=0;s<e.length;s++)u<a[s].length&&(_[v++]=a[s][u]);return _};for(var r={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},o={L:1,M:0,Q:3,H:2},i=0,n=1,a=2,s=3,h=4,l=5,u=6,f=7,g={PATTERN_POSITION_TABLE:[[],[6,18],[6,22],[6,26],[6,30],[6,34],[6,22,38],[6,24,42],[6,26,46],[6,28,50],[6,30,54],[6,32,58],[6,34,62],[6,26,46,66],[6,26,48,70],[6,26,50,74],[6,30,54,78],[6,30,56,82],[6,30,58,86],[6,34,62,90],[6,28,50,72,94],[6,26,50,74,98],[6,30,54,78,102],[6,28,54,80,106],[6,32,58,84,110],[6,30,58,86,114],[6,34,62,90,118],[6,26,50,74,98,122],[6,30,54,78,102,126],[6,26,52,78,104,130],[6,30,56,82,108,134],[6,34,60,86,112,138],[6,30,58,86,114,142],[6,34,62,90,118,146],[6,30,54,78,102,126,150],[6,24,50,76,102,128,154],[6,28,54,80,106,132,158],[6,32,58,84,110,136,162],[6,26,54,82,110,138,166],[6,30,58,86,114,142,170]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(t){for(var e=t<<10;g.getBCHDigit(e)-g.getBCHDigit(g.G15)>=0;)e^=g.G15<<g.getBCHDigit(e)-g.getBCHDigit(g.G15);return(t<<10|e)^g.G15_MASK},getBCHTypeNumber:function(t){for(var e=t<<12;g.getBCHDigit(e)-g.getBCHDigit(g.G18)>=0;)e^=g.G18<<g.getBCHDigit(e)-g.getBCHDigit(g.G18);return t<<12|e},getBCHDigit:function(t){for(var e=0;0!=t;)e++,t>>>=1;return e},getPatternPosition:function(t){return g.PATTERN_POSITION_TABLE[t-1]},getMask:function(t,e,r){switch(t){case i:return(e+r)%2==0;case n:return e%2==0;case a:return r%3==0;case s:return(e+r)%3==0;case h:return(Math.floor(e/2)+Math.floor(r/3))%2==0;case l:return e*r%2+e*r%3==0;case u:return(e*r%2+e*r%3)%2==0;case f:return(e*r%3+(e+r)%2)%2==0;default:throw new Error("bad maskPattern:"+t)}},getErrorCorrectPolynomial:function(t){for(var e=new p([1],0),r=0;r<t;r++)e=e.multiply(new p([1,d.gexp(r)],0));return e},getLengthInBits:function(t,e){if(1<=e&&e<10)switch(t){case r.MODE_NUMBER:return 10;case r.MODE_ALPHA_NUM:return 9;case r.MODE_8BIT_BYTE:case r.MODE_KANJI:return 8;default:throw new Error("mode:"+t)}else if(e<27)switch(t){case r.MODE_NUMBER:return 12;case r.MODE_ALPHA_NUM:return 11;case r.MODE_8BIT_BYTE:return 16;case r.MODE_KANJI:return 10;default:throw new Error("mode:"+t)}else{if(!(e<41))throw new Error("type:"+e);switch(t){case r.MODE_NUMBER:return 14;case r.MODE_ALPHA_NUM:return 13;case r.MODE_8BIT_BYTE:return 16;case r.MODE_KANJI:return 12;default:throw new Error("mode:"+t)}}},getLostPoint:function(t){for(var e=t.getModuleCount(),r=0,o=0;o<e;o++)for(var i=0;i<e;i++){for(var n=0,a=t.isDark(o,i),s=-1;s<=1;s++)if(!(o+s<0||e<=o+s))for(var h=-1;h<=1;h++)i+h<0||e<=i+h||0==s&&0==h||a==t.isDark(o+s,i+h)&&n++;n>5&&(r+=3+n-5)}for(o=0;o<e-1;o++)for(i=0;i<e-1;i++){var l=0;t.isDark(o,i)&&l++,t.isDark(o+1,i)&&l++,t.isDark(o,i+1)&&l++,t.isDark(o+1,i+1)&&l++,0!=l&&4!=l||(r+=3)}for(o=0;o<e;o++)for(i=0;i<e-6;i++)t.isDark(o,i)&&!t.isDark(o,i+1)&&t.isDark(o,i+2)&&t.isDark(o,i+3)&&t.isDark(o,i+4)&&!t.isDark(o,i+5)&&t.isDark(o,i+6)&&(r+=40);for(i=0;i<e;i++)for(o=0;o<e-6;o++)t.isDark(o,i)&&!t.isDark(o+1,i)&&t.isDark(o+2,i)&&t.isDark(o+3,i)&&t.isDark(o+4,i)&&!t.isDark(o+5,i)&&t.isDark(o+6,i)&&(r+=40);var u=0;for(i=0;i<e;i++)for(o=0;o<e;o++)t.isDark(o,i)&&u++;return r+=10*(Math.abs(100*u/e/e-50)/5)}},d={glog:function(t){if(t<1)throw new Error("glog("+t+")");return d.LOG_TABLE[t]},gexp:function(t){for(;t<0;)t+=255;for(;t>=256;)t-=255;return d.EXP_TABLE[t]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},c=0;c<8;c++)d.EXP_TABLE[c]=1<<c;for(c=8;c<256;c++)d.EXP_TABLE[c]=d.EXP_TABLE[c-4]^d.EXP_TABLE[c-5]^d.EXP_TABLE[c-6]^d.EXP_TABLE[c-8];for(c=0;c<255;c++)d.LOG_TABLE[d.EXP_TABLE[c]]=c;function p(t,e){if(void 0==t.length)throw new Error(t.length+"/"+e);for(var r=0;r<t.length&&0==t[r];)r++;this.num=new Array(t.length-r+e);for(var o=0;o<t.length-r;o++)this.num[o]=t[o+r]}function m(t,e){this.totalCount=t,this.dataCount=e}function _(){this.buffer=[],this.length=0}p.prototype={get:function(t){return this.num[t]},getLength:function(){return this.num.length},multiply:function(t){for(var e=new Array(this.getLength()+t.getLength()-1),r=0;r<this.getLength();r++)for(var o=0;o<t.getLength();o++)e[r+o]^=d.gexp(d.glog(this.get(r))+d.glog(t.get(o)));return new p(e,0)},mod:function(t){if(this.getLength()-t.getLength()<0)return this;for(var e=d.glog(this.get(0))-d.glog(t.get(0)),r=new Array(this.getLength()),o=0;o<this.getLength();o++)r[o]=this.get(o);for(o=0;o<t.getLength();o++)r[o]^=d.gexp(d.glog(t.get(o))+e);return new p(r,0).mod(t)}},m.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12,7,37,13],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]],m.getRSBlocks=function(t,e){var r=m.getRsBlockTable(t,e);if(void 0==r)throw new Error("bad rs block @ typeNumber:"+t+"/errorCorrectLevel:"+e);for(var o=r.length/3,i=[],n=0;n<o;n++)for(var a=r[3*n+0],s=r[3*n+1],h=r[3*n+2],l=0;l<a;l++)i.push(new m(s,h));return i},m.getRsBlockTable=function(t,e){switch(e){case o.L:return m.RS_BLOCK_TABLE[4*(t-1)+0];case o.M:return m.RS_BLOCK_TABLE[4*(t-1)+1];case o.Q:return m.RS_BLOCK_TABLE[4*(t-1)+2];case o.H:return m.RS_BLOCK_TABLE[4*(t-1)+3];default:return}},_.prototype={get:function(t){var e=Math.floor(t/8);return 1==(this.buffer[e]>>>7-t%8&1)},put:function(t,e){for(var r=0;r<e;r++)this.putBit(1==(t>>>e-r-1&1))},getLengthInBits:function(){return this.length},putBit:function(t){var e=Math.floor(this.length/8);this.buffer.length<=e&&this.buffer.push(0),t&&(this.buffer[e]|=128>>>this.length%8),this.length++}};var v=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]];function C(){var t=!1,e=navigator.userAgent;if(/android/i.test(e)){t=!0;var r=e.toString().match(/android ([0-9]\.[0-9])/i);r&&r[1]&&(t=parseFloat(r[1]))}return t}var w=function(){var t=function(t,e){this._el=t,this._htOption=e};return t.prototype.draw=function(t){var e=this._htOption,r=this._el,o=t.getModuleCount();Math.floor(e.width/o),Math.floor(e.height/o);function i(t,e){var r=document.createElementNS("http://www.w3.org/2000/svg",t);for(var o in e)e.hasOwnProperty(o)&&r.setAttribute(o,e[o]);return r}this.clear();var n=i("svg",{viewBox:"0 0 "+String(o)+" "+String(o),width:"100%",height:"100%",fill:e.colorLight});n.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink"),r.appendChild(n),n.appendChild(i("rect",{fill:e.colorLight,width:"100%",height:"100%"})),n.appendChild(i("rect",{fill:e.colorDark,width:"1",height:"1",id:"template"}));for(var a=0;a<o;a++)for(var s=0;s<o;s++)if(t.isDark(a,s)){var h=i("use",{x:String(s),y:String(a)});h.setAttributeNS("http://www.w3.org/1999/xlink","href","#template"),n.appendChild(h)}},t.prototype.clear=function(){for(;this._el.hasChildNodes();)this._el.removeChild(this._el.lastChild)},t}(),D="svg"===document.documentElement.tagName.toLowerCase()?w:"undefined"==typeof CanvasRenderingContext2D?function(){var t=function(t,e){this._el=t,this._htOption=e};return t.prototype.draw=function(t){for(var e=this._htOption,r=this._el,o=t.getModuleCount(),i=Math.floor(e.width/o),n=Math.floor(e.height/o),a=['<table style="border:0;border-collapse:collapse;">'],s=0;s<o;s++){a.push("<tr>");for(var h=0;h<o;h++)a.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;width:'+i+"px;height:"+n+"px;background-color:"+(t.isDark(s,h)?e.colorDark:e.colorLight)+';"></td>');a.push("</tr>")}a.push("</table>"),r.innerHTML=a.join("");var l=r.childNodes[0],u=(e.width-l.offsetWidth)/2,f=(e.height-l.offsetHeight)/2;u>0&&f>0&&(l.style.margin=f+"px "+u+"px")},t.prototype.clear=function(){this._el.innerHTML=""},t}():function(){function t(){this._elImage.src=this._elCanvas.toDataURL("image/png"),this._elImage.style.display="block",this._elCanvas.style.display="none"}if(this._android&&this._android<=2.1){var e=1/window.devicePixelRatio,r=CanvasRenderingContext2D.prototype.drawImage;CanvasRenderingContext2D.prototype.drawImage=function(t,o,i,n,a,s,h,l,u){if("nodeName"in t&&/img/i.test(t.nodeName))for(var f=arguments.length-1;f>=1;f--)arguments[f]=arguments[f]*e;else void 0===l&&(arguments[1]*=e,arguments[2]*=e,arguments[3]*=e,arguments[4]*=e);r.apply(this,arguments)}}var o=function(t,e){this._bIsPainted=!1,this._android=C(),this._htOption=e,this._elCanvas=document.createElement("canvas"),this._elCanvas.width=e.width,this._elCanvas.height=e.height,t.appendChild(this._elCanvas),this._el=t,this._oContext=this._elCanvas.getContext("2d"),this._bIsPainted=!1,this._elImage=document.createElement("img"),this._elImage.alt="Scan me!",this._elImage.style.display="none",this._el.appendChild(this._elImage),this._bSupportDataURI=null};return o.prototype.draw=function(t){var e=this._elImage,r=this._oContext,o=this._htOption,i=t.getModuleCount(),n=o.width/i,a=o.height/i,s=Math.round(n),h=Math.round(a);e.style.display="none",this.clear();for(var l=0;l<i;l++)for(var u=0;u<i;u++){var f=t.isDark(l,u),g=u*n,d=l*a;r.strokeStyle=f?o.colorDark:o.colorLight,r.lineWidth=1,r.fillStyle=f?o.colorDark:o.colorLight,r.fillRect(g,d,n,a),r.strokeRect(Math.floor(g)+.5,Math.floor(d)+.5,s,h),r.strokeRect(Math.ceil(g)-.5,Math.ceil(d)-.5,s,h)}this._bIsPainted=!0},o.prototype.makeImage=function(){this._bIsPainted&&function(t,e){var r=this;if(r._fFail=e,r._fSuccess=t,null===r._bSupportDataURI){var o=document.createElement("img"),i=function(){r._bSupportDataURI=!1,r._fFail&&r._fFail.call(r)};return o.onabort=i,o.onerror=i,o.onload=function(){r._bSupportDataURI=!0,r._fSuccess&&r._fSuccess.call(r)},void(o.src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==")}!0===r._bSupportDataURI&&r._fSuccess?r._fSuccess.call(r):!1===r._bSupportDataURI&&r._fFail&&r._fFail.call(r)}.call(this,t)},o.prototype.isPainted=function(){return this._bIsPainted},o.prototype.clear=function(){this._oContext.clearRect(0,0,this._elCanvas.width,this._elCanvas.height),this._bIsPainted=!1},o.prototype.round=function(t){return t?Math.floor(1e3*t)/1e3:t},o}();function A(t,e){for(var r=1,i=function(t){var e=encodeURI(t).toString().replace(/\%[0-9a-fA-F]{2}/g,"a");return e.length+(e.length!=t?3:0)}(t),n=0,a=v.length;n<=a;n++){var s=0;switch(e){case o.L:s=v[n][0];break;case o.M:s=v[n][1];break;case o.Q:s=v[n][2];break;case o.H:s=v[n][3]}if(i<=s)break;r++}if(r>v.length)throw new Error("Too long data");return r}(QRCode=function(t,e){if(this._htOption={width:256,height:256,typeNumber:4,colorDark:"#000000",colorLight:"#ffffff",correctLevel:o.H},"string"==typeof e&&(e={text:e}),e)for(var r in e)this._htOption[r]=e[r];"string"==typeof t&&(t=document.getElementById(t)),this._htOption.useSVG&&(D=w),this._android=C(),this._el=t,this._oQRCode=null,this._oDrawing=new D(this._el,this._htOption),this._htOption.text&&this.makeCode(this._htOption.text)}).prototype.makeCode=function(t){this._oQRCode=new e(A(t,this._htOption.correctLevel),this._htOption.correctLevel),this._oQRCode.addData(t),this._oQRCode.make(),this._el.title=t,this._oDrawing.draw(this._oQRCode),this.makeImage()},QRCode.prototype.makeImage=function(){"function"==typeof this._oDrawing.makeImage&&(!this._android||this._android>=3)&&this._oDrawing.makeImage()},QRCode.prototype.clear=function(){this._oDrawing.clear()},QRCode.CorrectLevel=o}(),"undefined"!=typeof module&&(module.exports=QRCode);
</script>
<script type="text/javascript">
// Decryption support.
// Specification:
// Data encrypted: data:salt:iv
// Key: PBKDF2WithHmacSHA256, iterations 10000, key length 256, AES
// Cipher: AES/GCM/NoPadding, authentication tag length 128
// https://github.com/twofas/2fas-android/blob/develop/core/cipher/src/main/java/com/twofasapp/cipher/backup/DataEncrypted.kt
// https://github.com/twofas/2fas-android/blob/develop/core/cipher/src/main/java/com/twofasapp/cipher/backup/internal/BackupKeyGeneratorPbkdf.kt
// https://github.com/twofas/2fas-android/blob/develop/core/cipher/src/main/java/com/twofasapp/cipher/internal/CipherAes.kt
// Thanks to https://github.com/elliotwutingfeng/2fas-backup-decryptor
function base64ToBytes(base64) {
return Uint8Array.from(atob(base64), (m) => m.codePointAt(0));
}
async function decryptServices(servicesEncrypted, password) {
const [dataWithAuthTag, salt, iv] = servicesEncrypted.split(":");
const key = await window.crypto.subtle.deriveKey(
{ name: "PBKDF2", hash: "SHA-256", salt: base64ToBytes(salt), iterations: 10000 },
await window.crypto.subtle.importKey( "raw", new TextEncoder().encode(password), "PBKDF2", false, ["deriveKey"] ),
{ name: "AES-GCM", length: 256 },
true,
["decrypt"],
);
return new TextDecoder().decode( await window.crypto.subtle.decrypt(
{ name: "AES-GCM", iv: base64ToBytes(iv), tagLength: 128 },
key ,
base64ToBytes(dataWithAuthTag),
) );
}
function showQRcodes(services) {
services.sort((a, b) => {
return a.name.localeCompare(b.name);
});
var i = 0;
document.getElementById("otps").innerHTML = "";
services.forEach((s) => {
document.getElementById("otps").innerHTML += "<div class='qr'><em>" + s.name + "</em><br><br><div id='qr" + i + "' /></div><div class='seed'><br/>Account:<br/>" + s.otp.account + "<br/><br/>Secret Key:<br/>" + s.secret + "</div>";
i++;
});
var i = 0;
services.forEach((s) => {
if (!s.otp.link) {
let url = new URL('otpauth://totp/'+encodeURIComponent(s.name)+":"+encodeURIComponent(s.otp.account));
url.searchParams.set('algorithm', s.otp.algorithm);
url.searchParams.set('digits', s.otp.digits);
url.searchParams.set('issuer', s.name);
url.searchParams.set('period', s.otp.period);
url.searchParams.set('secret', s.secret);
s.otp.link = url.toString();
} else {
s.otp.link = s.otp.link.replace("[hidden]", s.secret)
}
new QRCode(document.getElementById("qr" + i), {
text: s.otp.link,
width: 200,
height: 200
});
i++;
});
}
function showMessage(msg, color) {
divMessage.style.color = color;
divMessage.innerHTML = msg;
}
function isEncrypted(data) {
return (typeof data.servicesEncrypted != 'undefined');
}
function isDecryptionNotSupported() {
return (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)); // Sorry Safari https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/deriveKey
}
function process(data, password, silent) {
if (isEncrypted(data)) {
decryptServices(data.servicesEncrypted, password).then(
json => { showQRcodes(JSON.parse(json)) }
).catch(err => {
if (!silent) showMessage("Error decrypting data", "red");
});
} else if (typeof data.services != 'undefined' && data.services.length > 0) {
showQRcodes(data.services);
} else {
if (!silent) showMessage("Data is empty", "red");
}
}
function uiAction() {
showMessage("Processing...", "blue");
let reader = new FileReader();
reader.addEventListener("load", (e) => {
try {
let data = JSON.parse(e.target.result);
if (isEncrypted(data) && isDecryptionNotSupported()) {
showMessage("Decryption is not supported", "red");
} else {
let password = isEncrypted(data) ? prompt("Password for decryption") : "";
process(data, password);
}
} catch (e) {
showMessage("Error processing file", "red");
}
});
reader.readAsText(inputFile.files[0]);
inputFile.value = "";
}
</script>
<style>
#otps { display:flex;flex-flow:row wrap;gap:50px 80px;padding:25px; }
.qr { width:200px; }
.seed { font-family: monospace; overflow-wrap: break-word; display: block; }
@media print {
#otps { display:flex;flex-flow:row wrap;gap:40px 60px;padding:25px; }
.qr { width:180px; font-size:10px; page-break-inside: avoid; }
img { width:100%; }
}
input[type='file'] { font-size: 0; }
::file-selector-button { font-size: initial; }
</style>
</head>
<body>
<a href="https://2fas.com/" style="font-size:2rem;color:#000;text-decoration:none" target="_blank" rel="noopener nofollow">2FAS Backup Viewer</a>
<article id="otps">
<div style="width:800px">
<em>How to use:</em><br><br>
<ul>
<li>
Export 2FAS file backup first.
</li>
<li>
<label for="inputFile">Select the backup file (e.g. Backup_YYYY-MM-DD.2fas)</label>
<input type="file" id="inputFile" accept=".2fas" title=" "/><br>
<div id="divMessage"><br></div><br>
</li>
</ul>
<em>This application is neither affiliated with Two Factor Authentication Service, Inc. nor 2FAS. <br> Use this viewer at your own risk.</em><br><br>
Find latest version <a href="https://github.com/alexieong/2fas-backup-viewer">here</a>.
</div>
</article>
<script type="text/javascript">
inputFile.addEventListener("change", uiAction);
if (isDecryptionNotSupported()) {
showMessage("Decryption is not supported on this browser", "red");
}
</script>
</body>
</html>