index.html

<!DOCTYPE html>
<html>
    <head>
        <title>myLock Easy Encryption</title>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
        <meta name="viewport" content="width=device-width, user-scalable=no">
        <style>
            html, body, div, span, h1, h2, p, input, button{color:#000000;display:inline-block;margin:0;padding:0;font-family:"monospace";font-size:12px;}
            body{width:100%;text-align:center;}
            #wrapper{width:90%;text-align:center;}
            #wrapper > div{max-width:620px;text-align:left;}
            #footer{margin:50px 0px;}
            .error{color:#dd0000;}

            /* Login screen */
            #login{padding:10px;}
            h1{width:100%;text-align:center;font-size:24px;}
            #warning{width:100%;color:#dd0000;font-weight:bold;font-size:14px;text-align:justify;}
            #intro{font-size:14px;text-align:justify;}
            h2{margin:10px 0px;font-size:16px;}
            #login p{margin:10px 0px;}
            #login label{display:inline-block;margin-top:5px;width:100px;}
            #login div.input_wrapper{max-width:490px;width:100%;}
            #login input{width:100%;border:1px solid #aaaaaa;padding:2px;}
            #login input[type=submit]{width:160px;margin:10px 0px 0px 106px;font-size:16px;border:2px solid #aaaaaa;background-color:#ffffff;border-radius:5px;}
            #login input[type=submit]:hover{background-color:#eeeeee}
            #login span{display:inline-block;}

            /* Logged-in header */
            #header{width:100%;padding-top:10px;}
            #header label{width:100px;}
            #username_wrapper{max-width:450px;width:100%;}
            #username{width:100%;border:1px solid #aaaaaa;padding:2px;}
            #logout{display:inline-block;float:right;}

            /* Main screen */
            #main{width:100%;text-align:center !important;}
            #main button{width:80%;max-width:300px;border-radius:10px;margin-top:30px;padding:10px;border:2px solid #aaaaaa;background-color:#ffffff;}
            #main button:hover{background-color:#eeeeee}
            #tutorial_wrapper{max-width:100%;}
            #tutorial_pointer{width:0;height:0;border-style:solid;border-width:0px 25px 20px 25px;border-color:transparent transparent #eeeeee transparent;}
            #tutorial{max-width:400px;margin-top:-5px;border-radius:20px;padding:20px;background-color:#eeeeee;}
            #tutorial p{text-align:justify;font-size:14px;}
            #tutorial button{width:80px;margin:10px 0px 0px 0px;padding:5px;border:2px solid #aaaaaa;border-radius:5px;background-color:#eeeeee;}
            #tutorial button:hover{background-color:#ffffff}

            /* Send screen */
            #send{width:100%}
            #send a{display:inline-block;margin-bottom:20px;}
            #recip_label{vertical-align:top;font-size:16px;}
            #recip_list{vertical-align:top;max-width:560px;width:100%;margin-bottom:30px;}
            input.recip_row{width:100%;}
            #add_recip{font-size:10px;margin:3px;padding:0px 3px;border:1px solid #aaaaaa;border-radius:10px;background-color:#ffffff;}
            #add_recip:hover{background-color:#eeeeee;}
            #raw_wrapper{padding-bottom:30px;}
            #raw_label{font-size:16px;margin-bottom:10px;}
            #encryption_wrapper{width:100%;}
            #encryption_label{font-size:16px;margin-bottom:10px;vertical-align:middle;}
            #encryption_data{font-size:12px;text-decoration:none;color:#000000;padding:4px 20px;margin-bottom:10px;margin-top:-3px;border:2px solid #aaaaaa;border-radius:4px;background-color:#ffffff;vertical-align:top;}
            #encryption_data:hover{color:#000000;background-color:#eeeeee;}
            #encryption_percent_wrapper{width:100%;max-width:290px;margin-bottom:10px;vertical-align:middle;}
            #encryption_percent{vertical-align:middle;}
            #encryption_progress_wrapper{width:100%;max-width:240px;height:20px;border:2px solid #aaaaaa;vertical-align:middle;}
            #encryption_progress{width:100%;height:20px;background-color:#aaaaaa;}

            /* Receive screen */
            #receive{width:100%}
            #receive a{display:inline-block;margin-bottom:20px;}
            #encrypted_wrapper{padding-bottom:30px;}
            #encrypted_label{font-size:16px;margin-bottom:10px;}
            #decryption_wrapper{width:100%;}
            #decryption_label{font-size:16px;margin-bottom:10px;vertical-align:middle;}
            #decryption_data{font-size:12px;text-decoration:none;color:#000000;padding:4px 20px;margin-bottom:10px;margin-top:-3px;border:2px solid #aaaaaa;border-radius:4px;background-color:#ffffff;vertical-align:top;}
            #decryption_data:hover{color:#000000;background-color:#eeeeee;}
            #decryption_percent_wrapper{width:100%;max-width:290px;margin-bottom:10px;vertical-align:middle;}
            #decryption_percent{vertical-align:middle;}
            #decryption_progress_wrapper{width:100%;max-width:240px;height:20px;border:2px solid #aaaaaa;vertical-align:middle;}
            #decryption_progress{width:100%;height:20px;background-color:#aaaaaa;}
        </style>
    </head>
    <body>
        <div id="wrapper">

            <div id="login">
                <h1>myLock Easy Encryption</h1>
                <p id="warning">
                    WARNING: THIS IS A PROOF OF CONCEPT AND SHOULD NOT BE USED FOR REAL SECRETS.
                </p>
                <br/>
                <p id="intro">
                    Welcome to myLock, the easy way to securely encrypt data
                    for others! No one will be able to read anything you
                    encrypt except the people you want. Additionally, this
                    website is static, so no data is ever sent to any server.
                    You can even save this page and open it locally on your
                    computer! Finally, you can create as many new accounts as
                    you want :)
                </p>
                <br/>
                <h2>Create a new account:</h2>
                <br/>
                <form>
                    <label for="new_secret">Secret phrase:</label>
                    <div class="input_wrapper">
                        <input id="new_secret" type="password" placeholder="A secret phrase only YOU know (seriously), at least 40 characters."/>
                    </div>
                    <br/>
                    <input type="submit" id="register_button" value="Register"/>
                    <span id="register_msg">(this will generate a new username)</span>
                </form>
                <br/>
                <p>or</p>
                <br/>
                <h2>Login to an existing account:</h2>
                <br/>
                <form>
                    <label for="existing_username">Username:</label>
                    <div class="input_wrapper">
                        <input id="existing_username" placeholder="e.g. myLock_7ZtuwNgGr1ngjdSiBSpHdQ7fh5pFNJh5xosRo4XJ1VhcrMdhQSHyZQH"/>
                    </div>
                    <br/>
                    <label for="existing_secret">Secret phrase:</label>
                    <div class="input_wrapper">
                        <input id="existing_secret" type="password" placeholder="Your secret phrase"/>
                    </div>
                    <br/>
                    <input type="submit" id="login_button" value="Login"/>
                    <span id="login_msg"></span>
                </form>
            </div>

            <div id="header" style="display:none;">
                <a id="logout" href="#">logout</a>
                <label for="username">Your username:</label>
                <div id="username_wrapper">
                    <input id="username" value=""/>
                </div>
            </div>
            <br/>

            <div id="main" style="display:none;">
                <div id="tutorial_wrapper">
                    <div id="tutorial_pointer"></div>
                    <br/>
                    <div id="tutorial">
                        <p>
                            This is your new myLock username. <b>Copy it down!</b>
                            This username can be shared and published freely.
                            When you encrypt a file, all you need is the
                            username of the person you want to send the file to.
                        </p>
                        <button id="close_tutorial">Got it.</button>
                    </div>
                </div>
                <button id="choose_send">Encrypt a file</button>
                <br/>
                <button id="choose_receive">Decrypt a file</button>
            </div>

            <div id="send" style="display:none;">
                <a id="send_back" href="#">&lt; Back</a>
                <br/>
                <label id="recip_label" for="recip">To:</label>
                <div id="recip_list">
                    <input id="recip" class="recip_row" placeholder="Recipient (e.g. myLock_7ZtuwNgGr1ngjdSiBSpHdQ7fh5pFNJh5xosRo4XJ1VhcrMdhQSHyZQH)"/>
                    <button id="add_recip">+ Add more recipients</button>
                </div>
                <br/>
                <div id="raw_wrapper">
                    <div id="raw_label" for="raw_data">File you want to encrypt:</div>
                    <br/>
                    <input id="raw_data" type="file"></input>
                </div>
                <br/>
                <div id="encryption_wrapper">
                    <div id="encryption_label">Encrypted file:</div>
                    <div id="encryption_percent_wrapper">
                        <div id="encryption_progress_wrapper">
                            <div id="encryption_progress"></div>
                        </div>
                        <div id="encryption_percent">100%</div>
                    </div>
                    <a id="encryption_data" target="_blank">Download</a>
                    <div id="encryption_status"></div>
                </div>
            </div>

            <div id="receive" style="display:none;">
                <a id="receive_back" href="#">&lt; Back</a>
                <br/>
                <div id="encrypted_wrapper">
                    <div id="encrypted_label" for="encrypted_data">File you want to decrypt:</div>
                    <br/>
                    <input id="encrypted_data" type="file"/>
                </div>
                <br/>
                <div id="decryption_wrapper">
                    <div id="decryption_label">Decrypted file:</div>
                    <div id="decryption_percent_wrapper">
                        <div id="decryption_progress_wrapper">
                            <div id="decryption_progress"></div>
                        </div>
                        <div id="decryption_percent">100%</div>
                    </div>
                    <a id="decryption_data" target="_blank">Download</a>
                    <div id="decryption_status"></div>
                </div>
            </div>
            <div id="footer">
                Code and documentation:
                <a href="https://www.github.com/diafygi/myLock" target="_blank">
                    https://www.github.com/diafygi/myLock
                </a>
            </div>
        </div>

        <!-- External Libraries -->
        <script>
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l=0;e>=128;){for(a=0;16>a;a++)y[a]=t(n,8*a+l);for(a=0;80>a;a++){for(f=0;8>f;f++)c[f]=w[f];for(o=M(w[7],X(w[4]),j(w[4],w[5],w[6]),Kn[a],y[a%16]),c[7]=M(o,q(w[0]),V(w[0],w[1],w[2])),c[3]=M(c[3],o),f=0;8>f;f++)w[(f+1)%8]=c[f];if(a%16===15)for(f=0;16>f;f++)y[f]=M(y[f],y[(f+9)%16],D(y[(f+1)%16]),H(y[(f+14)%16]))}for(a=0;8>a;a++)w[a]=M(w[a],u[a]),u[a]=w[a];l+=128,e-=128}for(a=0;8>a;a++)i(r,8*a,u[a]);return e}function Q(r,n,e){var t,o=new Uint8Array(64),a=new Uint8Array(256),f=e;for(t=0;64>t;t++)o[t]=Cn[t];for(J(o,n,e),e%=128,t=0;256>t;t++)a[t]=0;for(t=0;e>t;t++)a[t]=n[f-e+t];for(a[e]=128,e=256-128*(112>e?1:0),a[e-9]=0,i(a,e-8,new sn(f/536870912|0,f<<3)),J(o,a,e),t=0;64>t;t++)r[t]=o[t];return 0}function W(r,n){var e=hn(),t=hn(),o=hn(),i=hn(),a=hn(),f=hn(),u=hn(),c=hn(),w=hn();Y(e,r[1],r[0]),Y(w,n[1],n[0]),K(e,e,w),T(t,r[0],r[1]),T(w,n[0],n[1]),K(t,t,w),K(o,r[3],n[3]),K(o,o,dn),K(i,r[2],n[2]),T(i,i,i),Y(a,t,e),Y(f,i,o),T(u,i,o),T(c,t,e),K(r[0],a,f),K(r[1],c,u),K(r[2],u,f),K(r[3],a,c)}function 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Uint8Array(64),f=new Uint8Array(64),u=new Uint8Array(64),c=new Float64Array(64),w=[hn(),hn(),hn(),hn()];Q(a,t,32),a[0]&=248,a[31]&=127,a[31]|=64;var y=e+64;for(o=0;e>o;o++)r[64+o]=n[o];for(o=0;32>o;o++)r[32+o]=a[32+o];for(Q(u,r.subarray(32),e+32),an(u),en(w,u),rn(r,w),o=32;64>o;o++)r[o]=t[o];for(Q(f,r,e+64),an(f),o=0;64>o;o++)c[o]=0;for(o=0;32>o;o++)c[o]=u[o];for(o=0;32>o;o++)for(i=0;32>i;i++)c[o+i]+=f[o]*a[i];return on(r.subarray(32),c),y}function un(r,n){var e=hn(),t=hn(),o=hn(),i=hn(),a=hn(),f=hn(),u=hn();return U(r[2],An),S(r[1],n),C(o,r[1]),K(i,o,Un),Y(o,o,r[2]),T(i,r[2],i),C(a,i),C(f,a),K(u,f,a),K(e,u,o),K(e,e,i),R(e,e),K(e,e,o),K(e,e,i),K(e,e,i),K(r[0],e,i),C(t,r[0]),K(t,t,i),m(t,o)&&K(r[0],r[0],mn),C(t,r[0]),K(t,t,i),m(t,o)?-1:(B(r[0])===n[31]>>7&&Y(r[0],pn,r[0]),K(r[3],r[0],r[1]),0)}function cn(r,n,e,t){var o,i,a=new Uint8Array(32),f=new Uint8Array(64),c=[hn(),hn(),hn(),hn()],w=[hn(),hn(),hn(),hn()];if(i=-1,64>e)return-1;if(un(w,t))return-1;for(o=0;e>o;o++)r[o]=n[o];for(o=0;32>o;o++)r[o+32]=t[o];if(Q(f,r,e),an(f),nn(c,w,f),en(w,n.subarray(32)),W(c,w),rn(a,c),e-=64,u(n,0,a,0)){for(o=0;e>o;o++)r[o]=0;return-1}for(o=0;e>o;o++)r[o]=n[o+64];return i=e}function wn(r,n){if(r.length!==Rn)throw new Error("bad key size");if(n.length!==kn)throw new Error("bad nonce size")}function yn(r,n){if(r.length!==On)throw new Error("bad public key size");if(n.length!==Mn)throw new Error("bad secret key size")}function ln(){for(var r,n={}.toString,e=0;e<arguments.length;e++)if("[object Uint8Array]"!==(r=n.call(arguments[e])))throw new TypeError("unexpected type "+r+", use Uint8Array")}var sn=function(r,n){this.hi=0|r,this.lo=0|n},hn=function(r){var n,e=new Float64Array(16);if(r)for(n=0;n<r.length;n++)e[n]=r[n];return e},gn=function(){throw new Error("no PRNG")},vn=new Uint8Array(16),bn=new Uint8Array(32);bn[0]=9;var pn=hn(),An=hn([1]),_n=hn([56129,1]),Un=hn([30883,4953,19914,30187,55467,16705,2637,112,59544,30585,16505,36039,65139,11119,27886,20995]),dn=hn([61785,9906,39828,60374,45398,33411,5274,224,53552,61171,33010,6542,64743,22239,55772,9222]),En=hn([54554,36645,11616,51542,42930,38181,51040,26924,56412,64982,57905,49316,21502,52590,14035,8553]),xn=hn([26200,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214]),mn=hn([41136,18958,6951,50414,58488,44335,6150,12099,55207,15867,153,11085,57099,20417,9344,11139]),Bn=new Uint8Array([101,120,112,97,110,100,32,51,50,45,98,121,116,101,32,107]),Sn=new Uint32Array([5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,252]),Tn=A,Yn=_,Kn=[new sn(1116352408,3609767458),new sn(1899447441,602891725),new sn(3049323471,3964484399),new sn(3921009573,2173295548),new sn(961987163,4081628472),new sn(1508970993,3053834265),new sn(2453635748,2937671579),new sn(2870763221,3664609560),new sn(3624381080,2734883394),new sn(310598401,1164996542),new sn(607225278,1323610764),new sn(1426881987,3590304994),new sn(1925078388,4068182383),new sn(2162078206,991336113),new sn(2614888103,633803317),new sn(3248222580,3479774868),new sn(3835390401,2666613458),new sn(4022224774,944711139),new sn(264347078,2341262773),new sn(604807628,2007800933),new sn(770255983,1495990901),new sn(1249150122,1856431235),new sn(1555081692,3175218132),new sn(1996064986,2198950837),new sn(2554220882,3999719339),new sn(2821834349,766784016),new sn(2952996808,2566594879),new sn(3210313671,3203337956),new sn(3336571891,1034457026),new sn(3584528711,2466948901),new sn(113926993,3758326383),new sn(338241895,168717936),new sn(666307205,1188179964),new sn(773529912,1546045734),new sn(1294757372,1522805485),new sn(1396182291,2643833823),new sn(1695183700,2343527390),new sn(1986661051,1014477480),new sn(2177026350,1206759142),new sn(2456956037,344077627),new sn(2730485921,1290863460),new sn(2820302411,3158454273),new sn(3259730800,3505952657),new sn(3345764771,106217008),new sn(3516065817,3606008344),new sn(3600352804,1432725776),new sn(4094571909,1467031594),new sn(275423344,851169720),new sn(430227734,3100823752),new sn(506948616,1363258195),new sn(659060556,3750685593),new sn(883997877,3785050280),new sn(958139571,3318307427),new sn(1322822218,3812723403),new sn(1537002063,2003034995),new sn(1747873779,3602036899),new sn(1955562222,1575990012),new sn(2024104815,1125592928),new sn(2227730452,2716904306),new sn(2361852424,442776044),new sn(2428436474,593698344),new sn(2756734187,3733110249),new sn(3204031479,2999351573),new sn(3329325298,3815920427),new sn(3391569614,3928383900),new sn(3515267271,566280711),new sn(3940187606,3454069534),new sn(4118630271,4000239992),new sn(116418474,1914138554),new sn(174292421,2731055270),new sn(289380356,3203993006),new sn(460393269,320620315),new sn(685471733,587496836),new sn(852142971,1086792851),new sn(1017036298,365543100),new sn(1126000580,2618297676),new sn(1288033470,3409855158),new sn(1501505948,4234509866),new sn(1607167915,987167468),new sn(1816402316,1246189591)],Cn=new Uint8Array([106,9,230,103,243,188,201,8,187,103,174,133,132,202,167,59,60,110,243,114,254,148,248,43,165,79,245,58,95,29,54,241,81,14,82,127,173,230,130,209,155,5,104,140,43,62,108,31,31,131,217,171,251,65,189,107,91,224,205,25,19,126,33,121]),Ln=new Float64Array([237,211,245,92,26,99,18,88,214,156,247,162,222,249,222,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16]),Rn=32,kn=24,zn=32,Pn=16,Fn=32,Nn=32,On=32,Mn=32,Gn=32,In=kn,Zn=zn,jn=Pn,Vn=64,qn=32,Xn=64,Dn=64;r.lowlevel={crypto_stream_xor:g,crypto_stream:h,crypto_stream_salsa20_xor:l,crypto_stream_salsa20:s,crypto_onetimeauth:b,crypto_onetimeauth_verify:p,crypto_verify_16:f,crypto_verify_32:u,crypto_secretbox:A,crypto_secretbox_open:_,crypto_scalarmult:k,crypto_scalarmult_base:z,crypto_box_beforenm:F,crypto_box_afternm:Tn,crypto_box:N,crypto_box_open:O,crypto_box_keypair:P,crypto_hash:Q,crypto_hashblocks:J,crypto_sign:fn,crypto_sign_keypair:tn,crypto_sign_open:cn,crypto_secretbox_KEYBYTES:Rn,crypto_secretbox_NONCEBYTES:kn,crypto_secretbox_ZEROBYTES:zn,crypto_secretbox_BOXZEROBYTES:Pn,crypto_scalarmult_BYTES:Fn,crypto_scalarmult_SCALARBYTES:Nn,crypto_box_PUBLICKEYBYTES:On,crypto_box_SECRETKEYBYTES:Mn,crypto_box_BEFORENMBYTES:Gn,crypto_box_NONCEBYTES:In,crypto_box_ZEROBYTES:Zn,crypto_box_BOXZEROBYTES:jn,crypto_sign_BYTES:Vn,crypto_sign_PUBLICKEYBYTES:qn,crypto_sign_SECRETKEYBYTES:Xn,crypto_hash_BYTES:Dn},r.util={},r.util.decodeUTF8=function(r){var n,e=unescape(encodeURIComponent(r)),t=new Uint8Array(e.length);for(n=0;n<e.length;n++)t[n]=e.charCodeAt(n);return t},r.util.encodeUTF8=function(r){var n,e=[];for(n=0;n<r.length;n++)e.push(String.fromCharCode(r[n]));return decodeURIComponent(escape(e.join("")))},r.util.encodeBase64=function(r){if("undefined"==typeof btoa)return new Buffer(r).toString("base64");var n,e=[],t=r.length;for(n=0;t>n;n++)e.push(String.fromCharCode(r[n]));return btoa(e.join(""))},r.util.decodeBase64=function(r){if("undefined"==typeof atob)return new Uint8Array(Array.prototype.slice.call(new Buffer(r,"base64"),0));var n,e=atob(r),t=new Uint8Array(e.length);for(n=0;n<e.length;n++)t[n]=e.charCodeAt(n);return t},r.randomBytes=function(r){var n=new Uint8Array(r);return gn(n,r),n},r.secretbox=function(r,n,e){ln(r,n,e),wn(e,n);for(var t=new Uint8Array(zn+r.length),o=new Uint8Array(t.length),i=0;i<r.length;i++)t[i+zn]=r[i];return A(o,t,t.length,n,e),o.subarray(Pn)},r.secretbox.open=function(r,n,e){ln(r,n,e),wn(e,n);for(var t=new Uint8Array(Pn+r.length),o=new Uint8Array(t.length),i=0;i<r.length;i++)t[i+Pn]=r[i];return t.length<32?!1:0!==_(o,t,t.length,n,e)?!1:o.subarray(zn)},r.secretbox.keyLength=Rn,r.secretbox.nonceLength=kn,r.secretbox.overheadLength=Pn,r.scalarMult=function(r,n){if(ln(r,n),r.length!==Nn)throw new Error("bad n size");if(n.length!==Fn)throw new Error("bad p size");var e=new Uint8Array(Fn);return k(e,r,n),e},r.scalarMult.base=function(r){if(ln(r),r.length!==Nn)throw new Error("bad n size");var n=new Uint8Array(Fn);return z(n,r),n},r.scalarMult.scalarLength=Nn,r.scalarMult.groupElementLength=Fn,r.box=function(n,e,t,o){var i=r.box.before(t,o);return r.secretbox(n,e,i)},r.box.before=function(r,n){ln(r,n),yn(r,n);var e=new Uint8Array(Gn);return F(e,r,n),e},r.box.after=r.secretbox,r.box.open=function(n,e,t,o){var i=r.box.before(t,o);return r.secretbox.open(n,e,i)},r.box.open.after=r.secretbox.open,r.box.keyPair=function(){var r=new Uint8Array(On),n=new Uint8Array(Mn);return P(r,n),{publicKey:r,secretKey:n}},r.box.keyPair.fromSecretKey=function(r){if(ln(r),r.length!==Mn)throw new Error("bad secret key size");var n=new Uint8Array(On);return z(n,r),{publicKey:n,secretKey:r}},r.box.publicKeyLength=On,r.box.secretKeyLength=Mn,r.box.sharedKeyLength=Gn,r.box.nonceLength=In,r.box.overheadLength=r.secretbox.overheadLength,r.sign=function(r,n){if(ln(r,n),n.length!==Xn)throw new Error("bad secret key size");var e=new Uint8Array(Vn+r.length);fn(e,r,r.length,n);for(var t=new Uint8Array(Vn),o=0;o<t.length;o++)t[o]=e[o];return t},r.sign.open=function(r,n,e){if(ln(r,n,e),n.length!==Vn)throw new Error("bad signature size");if(e.length!==qn)throw new Error("bad public key size");var t,o=new Uint8Array(Vn+r.length),i=new Uint8Array(Vn+r.length);for(t=0;Vn>t;t++)o[t]=n[t];for(t=0;t<r.length;t++)o[t+Vn]=r[t];var a=cn(i,o,o.length,e);return 0>a?!1:i.subarray(0,a)},r.sign.keyPair=function(){var r=new Uint8Array(qn),n=new Uint8Array(Xn);return tn(r,n),{publicKey:r,secretKey:n}},r.sign.keyPair.fromSecretKey=function(r){if(ln(r),r.length!==Xn)throw new Error("bad secret key size");var n,e=new Uint8Array(qn);for(n=0;32>n;n++)e[n]=r[32+n];return{publicKey:e,secretKey:r}},r.sign.publicKeyLength=qn,r.sign.secretKeyLength=Xn,r.sign.signatureLength=Vn,r.hash=function(r){ln(r);var n=new Uint8Array(Dn);return Q(n,r,r.length),n},r.hash.hashLength=Dn,r.verify=function(r,n){return ln(r,n),0===r.length||0===n.length?!1:r.length!==n.length?!1:0===a(r,0,n,0,r.length)?!0:!1},r.setPRNG=function(r){gn=r},function(){var n;"undefined"!=typeof window?(window.crypto&&window.crypto.getRandomValues?n=window.crypto:window.msCrypto&&window.msCrypto.getRandomValues&&(n=window.msCrypto),n&&r.setPRNG(function(r,e){var t,o=new Uint8Array(e);for(n.getRandomValues(o),t=0;e>t;t++)r[t]=o[t]})):"undefined"!=typeof require&&(n=require("crypto"),n&&r.setPRNG(function(r,e){var t,o=n.randomBytes(e);for(t=0;e>t;t++)r[t]=o[t]}))}()}("undefined"!=typeof module&&module.exports?module.exports:window.nacl=window.nacl||{});

            //from https://github.com/kaepora/miniLock/blob/144c6c531625531903b851c0954cf183ecd5984e/src/js/lib/base58.js
            //minified using http://refresh-sf.com/yui/
            var Base58={};Base58.alphabet="123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";Base58.alphabetMap={};for(var i=0;i<Base58.alphabet.length;i++){Base58.alphabetMap[Base58.alphabet.charAt(i)]=i}Base58.encode=function(a){if(a.length===0){return""}var c,b,d=[0];for(c=0;c<a.length;c++){for(b=0;b<d.length;b++){d[b]<<=8}d[d.length-1]+=a[c];var e=0;for(b=d.length-1;b>=0;b--){d[b]+=e;e=(d[b]/58)|0;d[b]%=58}while(e){d.unshift(e);e=(d[0]/58)|0;d[0]%=58}}for(c=0;c<a.length-1&&a[c]==0;c++){d.unshift(0)}return d.map(function(f){return Base58.alphabet[f]}).join("")};Base58.decode=function(d){if(d.length===0){return(new Uint8Array())}var b=d.split("").map(function(g){return Base58.alphabetMap[g]});var e,c,a=[0];for(e=0;e<b.length;e++){for(c=0;c<a.length;c++){a[c]*=58}a[a.length-1]+=b[e];var f=0;for(c=a.length-1;c>=0;c--){a[c]+=f;f=a[c]>>8;a[c]&=255}while(f){a.unshift(f);f=a[0]>>8;a[0]&=255}}for(e=0;e<b.length-1&&b[e]==0;e++){a.unshift(0)}return(new Uint8Array(a))};
        </script>

        <!-- Core myLock Library -->
        <script id="scrypt_worker" type="javascript/worker">
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                //from https://github.com/dchest/scrypt-async-js/blob/940cff15a5d627f6849b4cb52b2a949ffb31dfa1/scrypt-async.min.js
                /*!
                 * Fast "async" scrypt implementation in JavaScript.
                 * Copyright (c) 2013-2014 Dmitry Chestnykh | BSD License
                 * https://github.com/dchest/scrypt-async-js
                 */
                function scrypt(r,n,t,o,e,u,f,a){"use strict";function h(r){function n(r){for(var n=0,p=r.length;p>=64;){var l,v,g,y,w,d=o,A=e,b=u,m=f,I=a,j=h,x=c,E=s;for(v=0;16>v;v++)g=n+4*v,i[v]=(255&r[g])<<24|(255&r[g+1])<<16|(255&r[g+2])<<8|255&r[g+3];for(v=16;64>v;v++)l=i[v-2],y=(l>>>17|l<<15)^(l>>>19|l<<13)^l>>>10,l=i[v-15],w=(l>>>7|l<<25)^(l>>>18|l<<14)^l>>>3,i[v]=(y+i[v-7]|0)+(w+i[v-16]|0)|0;for(v=0;64>v;v++)y=(((I>>>6|I<<26)^(I>>>11|I<<21)^(I>>>25|I<<7))+(I&j^~I&x)|0)+(E+(t[v]+i[v]|0)|0)|0,w=((d>>>2|d<<30)^(d>>>13|d<<19)^(d>>>22|d<<10))+(d&A^d&b^A&b)|0,E=x,x=j,j=I,I=m+y|0,m=b,b=A,A=d,d=y+w|0;o=o+d|0,e=e+A|0,u=u+b|0,f=f+m|0,a=a+I|0,h=h+j|0,c=c+x|0,s=s+E|0,n+=64,p-=64}}var t=[1116352408,1899447441,3049323471,3921009573,961987163,1508970993,2453635748,2870763221,3624381080,310598401,607225278,1426881987,1925078388,2162078206,2614888103,3248222580,3835390401,4022224774,264347078,604807628,770255983,1249150122,1555081692,1996064986,2554220882,2821834349,2952996808,3210313671,3336571891,3584528711,113926993,338241895,666307205,773529912,1294757372,1396182291,1695183700,1986661051,2177026350,2456956037,2730485921,2820302411,3259730800,3345764771,3516065817,3600352804,4094571909,275423344,430227734,506948616,659060556,883997877,958139571,1322822218,1537002063,1747873779,1955562222,2024104815,2227730452,2361852424,2428436474,2756734187,3204031479,3329325298],o=1779033703,e=3144134277,u=1013904242,f=2773480762,a=1359893119,h=2600822924,c=528734635,s=1541459225,i=new Array(64);n(r);var p,l=r.length%64,v=r.length/536870912|0,g=r.length<<3,y=56>l?56:120,w=r.slice(r.length-l,r.length);for(w.push(128),p=l+1;y>p;p++)w.push(0);return w.push(v>>>24&255),w.push(v>>>16&255),w.push(v>>>8&255),w.push(v>>>0&255),w.push(g>>>24&255),w.push(g>>>16&255),w.push(g>>>8&255),w.push(g>>>0&255),n(w),[o>>>24&255,o>>>16&255,o>>>8&255,o>>>0&255,e>>>24&255,e>>>16&255,e>>>8&255,e>>>0&255,u>>>24&255,u>>>16&255,u>>>8&255,u>>>0&255,f>>>24&255,f>>>16&255,f>>>8&255,f>>>0&255,a>>>24&255,a>>>16&255,a>>>8&255,a>>>0&255,h>>>24&255,h>>>16&255,h>>>8&255,h>>>0&255,c>>>24&255,c>>>16&255,c>>>8&255,c>>>0&255,s>>>24&255,s>>>16&255,s>>>8&255,s>>>0&255]}function c(r,n,t){function o(){for(var r=u-1;r>=u-4;r--){if(f[r]++,f[r]<=255)return;f[r]=0}}r=r.length<=64?r:h(r);var e,u=64+n.length+4,f=new Array(u),a=new Array(64),c=[];for(e=0;64>e;e++)f[e]=54;for(e=0;e<r.length;e++)f[e]^=r[e];for(e=0;e<n.length;e++)f[64+e]=n[e];for(e=u-4;u>e;e++)f[e]=0;for(e=0;64>e;e++)a[e]=92;for(e=0;e<r.length;e++)a[e]^=r[e];for(;t>=32;)o(),c=c.concat(h(a.concat(h(f)))),t-=32;return t>0&&(o(),c=c.concat(h(a.concat(h(f))).slice(0,t))),c}function s(r,n,t,o){var e,u,f=r[0]^n[t++],a=r[1]^n[t++],h=r[2]^n[t++],c=r[3]^n[t++],s=r[4]^n[t++],i=r[5]^n[t++],p=r[6]^n[t++],l=r[7]^n[t++],v=r[8]^n[t++],g=r[9]^n[t++],y=r[10]^n[t++],w=r[11]^n[t++],d=r[12]^n[t++],A=r[13]^n[t++],b=r[14]^n[t++],m=r[15]^n[t++],I=f,j=a,x=h,E=c,C=s,N=i,T=p,k=l,q=v,z=g,B=y,D=w,F=d,G=A,H=b,J=m;for(u=0;8>u;u+=2)e=I+F,C^=e<<7|e>>>25,e=C+I,q^=e<<9|e>>>23,e=q+C,F^=e<<13|e>>>19,e=F+q,I^=e<<18|e>>>14,e=N+j,z^=e<<7|e>>>25,e=z+N,G^=e<<9|e>>>23,e=G+z,j^=e<<13|e>>>19,e=j+G,N^=e<<18|e>>>14,e=B+T,H^=e<<7|e>>>25,e=H+B,x^=e<<9|e>>>23,e=x+H,T^=e<<13|e>>>19,e=T+x,B^=e<<18|e>>>14,e=J+D,E^=e<<7|e>>>25,e=E+J,k^=e<<9|e>>>23,e=k+E,D^=e<<13|e>>>19,e=D+k,J^=e<<18|e>>>14,e=I+E,j^=e<<7|e>>>25,e=j+I,x^=e<<9|e>>>23,e=x+j,E^=e<<13|e>>>19,e=E+x,I^=e<<18|e>>>14,e=N+C,T^=e<<7|e>>>25,e=T+N,k^=e<<9|e>>>23,e=k+T,C^=e<<13|e>>>19,e=C+k,N^=e<<18|e>>>14,e=B+z,D^=e<<7|e>>>25,e=D+B,q^=e<<9|e>>>23,e=q+D,z^=e<<13|e>>>19,e=z+q,B^=e<<18|e>>>14,e=J+H,F^=e<<7|e>>>25,e=F+J,G^=e<<9|e>>>23,e=G+F,H^=e<<13|e>>>19,e=H+G,J^=e<<18|e>>>14;n[o++]=r[0]=I+f|0,n[o++]=r[1]=j+a|0,n[o++]=r[2]=x+h|0,n[o++]=r[3]=E+c|0,n[o++]=r[4]=C+s|0,n[o++]=r[5]=N+i|0,n[o++]=r[6]=T+p|0,n[o++]=r[7]=k+l|0,n[o++]=r[8]=q+v|0,n[o++]=r[9]=z+g|0,n[o++]=r[10]=B+y|0,n[o++]=r[11]=D+w|0,n[o++]=r[12]=F+d|0,n[o++]=r[13]=G+A|0,n[o++]=r[14]=H+b|0,n[o++]=r[15]=J+m|0}function i(r,n,t,o,e){for(;e--;)r[n++]=t[o++]}function p(r,n,t,o,e){for(;e--;)r[n++]^=t[o++]}function l(r,n,t,o,e){i(r,0,n,t+16*(2*e-1),16);for(var u=0;2*e>u;u+=2)s(r,n,t+16*u,o+8*u),s(r,n,t+16*u+16,o+8*u+16*e)}function v(r,n,t){return r[n+16*(2*t-1)]}function g(r){for(var n=[],t=0;t<r.length;t++){var o=r.charCodeAt(t);128>o?n.push(o):o>127&&2048>o?(n.push(o>>6|192),n.push(63&o|128)):(n.push(o>>12|224),n.push(o>>6&63|128),n.push(64&o|128))}return n}function y(r){for(var n="0123456789abcdef".split(""),t=r.length,o=[],e=0;t>e;e++)o.push(n[r[e]>>>4&15]),o.push(n[r[e]>>>0&15]);return o.join("")}function w(r){for(var n,t,o,e,u="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split(""),f=r.length,a=[],h=0;f>h;)n=f>h?r[h++]:0,t=f>h?r[h++]:0,o=f>h?r[h++]:0,e=(n<<16)+(t<<8)+o,a.push(u[e>>>18&63]),a.push(u[e>>>12&63]),a.push(u[e>>>6&63]),a.push(u[e>>>0&63]);return f%3>0&&(a[a.length-1]="=",f%3==1&&(a[a.length-2]="=")),a.join("")}function d(){for(var r=0;32*o>r;r++){var n=4*r;x[q+r]=(255&C[n+3])<<24|(255&C[n+2])<<16|(255&C[n+1])<<8|(255&C[n+0])<<0}}function A(r,n){for(var t=r;n>t;t+=2)i(E,32*t*o,x,q,32*o),l(N,x,q,z,o),i(E,32*(t+1)*o,x,z,32*o),l(N,x,z,q,o)}function b(r,n){for(var t=r;n>t;t+=2){var e=v(x,q,o)&k-1;p(x,q,E,32*e*o,32*o),l(N,x,q,z,o),e=v(x,z,o)&k-1,p(x,z,E,32*e*o,32*o),l(N,x,z,q,o)}}function m(){for(var r=0;32*o>r;r++){var n=x[q+r];C[4*r+0]=n>>>0&255,C[4*r+1]=n>>>8&255,C[4*r+2]=n>>>16&255,C[4*r+3]=n>>>24&255}}function I(r,n,t,o,e){!function u(){setTimeout(function(){o(r,n>r+t?r+t:n),r+=t,n>r?u():e()},0)}()}var j=1;if(1>t||t>31)throw new Error("scrypt: logN not be between 1 and 31");var x,E,C,N,T=1<<31>>>0,k=1<<t>>>0;if(o*j>=1<<30||o>T/128/j||o>T/256||k>T/128/o)throw new Error("scrypt: parameters are too large");"string"==typeof r&&(r=g(r)),"string"==typeof n&&(n=g(n)),"undefined"!=typeof Int32Array?(x=new Int32Array(64*o),E=new Int32Array(32*k*o),N=new Int32Array(16)):(x=[],E=[],N=new Array(16)),C=c(r,n,128*j*o);var q=0,z=32*o;u||(u=1e3),d(),I(0,k,2*u,A,function(){I(0,k,2*u,b,function(){m();var n=c(r,C,e);f("base64"==a?w(n):"hex"==a?y(n):n)})})}"undefined"!=typeof module&&(module.exports=scrypt);

                scrypt(message.data.salt, message.data.key, 17, 8, 32, 1000, function(b64_bytes){
                    self.postMessage(b64_bytes);
                }, "base64");
            };
        </script>
        <script id="encrypt_worker" type="javascript/worker">
            self.onmessage = function(message) {
                var window = {};

                //from https://github.com/dchest/tweetnacl-js/blob/51091a387335388a6a10ff89afbd16bfccc2c90c/nacl.min.js
                !function(r){"use strict";function n(r,n){return r<<n|r>>>32-n}function e(r,n){var e=255&r[n+3];return e=e<<8|255&r[n+2],e=e<<8|255&r[n+1],e<<8|255&r[n+0]}function t(r,n){var e=r[n]<<24|r[n+1]<<16|r[n+2]<<8|r[n+3],t=r[n+4]<<24|r[n+5]<<16|r[n+6]<<8|r[n+7];return new sn(e,t)}function o(r,n,e){var t;for(t=0;4>t;t++)r[n+t]=255&e,e>>>=8}function i(r,n,e){r[n]=e.hi>>24&255,r[n+1]=e.hi>>16&255,r[n+2]=e.hi>>8&255,r[n+3]=255&e.hi,r[n+4]=e.lo>>24&255,r[n+5]=e.lo>>16&255,r[n+6]=e.lo>>8&255,r[n+7]=255&e.lo}function a(r,n,e,t,o){var i,a=0;for(i=0;o>i;i++)a|=r[n+i]^e[t+i];return(1&a-1>>>8)-1}function f(r,n,e,t){return a(r,n,e,t,16)}function u(r,n,e,t){return a(r,n,e,t,32)}function c(r,t,i,a,f){var u,c,w,y=new Uint32Array(16),l=new Uint32Array(16),s=new Uint32Array(16),h=new Uint32Array(4);for(u=0;4>u;u++)l[5*u]=e(a,4*u),l[1+u]=e(i,4*u),l[6+u]=e(t,4*u),l[11+u]=e(i,16+4*u);for(u=0;16>u;u++)s[u]=l[u];for(u=0;20>u;u++){for(c=0;4>c;c++){for(w=0;4>w;w++)h[w]=l[(5*c+4*w)%16];for(h[1]^=n(h[0]+h[3]|0,7),h[2]^=n(h[1]+h[0]|0,9),h[3]^=n(h[2]+h[1]|0,13),h[0]^=n(h[3]+h[2]|0,18),w=0;4>w;w++)y[4*c+(c+w)%4]=h[w]}for(w=0;16>w;w++)l[w]=y[w]}if(f){for(u=0;16>u;u++)l[u]=l[u]+s[u]|0;for(u=0;4>u;u++)l[5*u]=l[5*u]-e(a,4*u)|0,l[6+u]=l[6+u]-e(t,4*u)|0;for(u=0;4>u;u++)o(r,4*u,l[5*u]),o(r,16+4*u,l[6+u])}else for(u=0;16>u;u++)o(r,4*u,l[u]+s[u]|0)}function w(r,n,e,t){return c(r,n,e,t,!1),0}function y(r,n,e,t){return c(r,n,e,t,!0),0}function l(r,n,e,t,o,i,a){var f,u,c=new Uint8Array(16),y=new Uint8Array(64);if(!o)return 0;for(u=0;16>u;u++)c[u]=0;for(u=0;8>u;u++)c[u]=i[u];for(;o>=64;){for(w(y,c,a,Bn),u=0;64>u;u++)r[n+u]=(e?e[t+u]:0)^y[u];for(f=1,u=8;16>u;u++)f=f+(255&c[u])|0,c[u]=255&f,f>>>=8;o-=64,n+=64,e&&(t+=64)}if(o>0)for(w(y,c,a,Bn),u=0;o>u;u++)r[n+u]=(e?e[t+u]:0)^y[u];return 0}function s(r,n,e,t,o){return l(r,n,null,0,e,t,o)}function h(r,n,e,t,o){var i=new Uint8Array(32);return y(i,t,o,Bn),s(r,n,e,t.subarray(16),i)}function g(r,n,e,t,o,i,a){var f=new Uint8Array(32);return y(f,i,a,Bn),l(r,n,e,t,o,i.subarray(16),f)}function v(r,n){var e,t=0;for(e=0;17>e;e++)t=t+(r[e]+n[e]|0)|0,r[e]=255&t,t>>>=8}function b(r,n,e,t,o,i){var a,f,u,c,w=new Uint32Array(17),y=new Uint32Array(17),l=new Uint32Array(17),s=new Uint32Array(17),h=new Uint32Array(17);for(u=0;17>u;u++)y[u]=l[u]=0;for(u=0;16>u;u++)y[u]=i[u];for(y[3]&=15,y[4]&=252,y[7]&=15,y[8]&=252,y[11]&=15,y[12]&=252,y[15]&=15;o>0;){for(u=0;17>u;u++)s[u]=0;for(u=0;16>u&&o>u;++u)s[u]=e[t+u];for(s[u]=1,t+=u,o-=u,v(l,s),f=0;17>f;f++)for(w[f]=0,u=0;17>u;u++)w[f]=w[f]+l[u]*(f>=u?y[f-u]:320*y[f+17-u]|0)|0|0;for(f=0;17>f;f++)l[f]=w[f];for(c=0,u=0;16>u;u++)c=c+l[u]|0,l[u]=255&c,c>>>=8;for(c=c+l[16]|0,l[16]=3&c,c=5*(c>>>2)|0,u=0;16>u;u++)c=c+l[u]|0,l[u]=255&c,c>>>=8;c=c+l[16]|0,l[16]=c}for(u=0;17>u;u++)h[u]=l[u];for(v(l,Sn),a=0|-(l[16]>>>7),u=0;17>u;u++)l[u]^=a&(h[u]^l[u]);for(u=0;16>u;u++)s[u]=i[u+16];for(s[16]=0,v(l,s),u=0;16>u;u++)r[n+u]=l[u];return 0}function p(r,n,e,t,o,i){var a=new Uint8Array(16);return b(a,0,e,t,o,i),f(r,n,a,0)}function A(r,n,e,t,o){var i;if(32>e)return-1;for(g(r,0,n,0,e,t,o),b(r,16,r,32,e-32,r),i=0;16>i;i++)r[i]=0;return 0}function _(r,n,e,t,o){var i,a=new Uint8Array(32);if(32>e)return-1;if(h(a,0,32,t,o),0!==p(n,16,n,32,e-32,a))return-1;for(g(r,0,n,0,e,t,o),i=0;32>i;i++)r[i]=0;return 0}function U(r,n){var e;for(e=0;16>e;e++)r[e]=0|n[e]}function d(r){var n,e;for(e=0;16>e;e++)r[e]+=65536,n=Math.floor(r[e]/65536),r[(e+1)*(15>e?1:0)]+=n-1+37*(n-1)*(15===e?1:0),r[e]-=65536*n}function E(r,n,e){for(var t,o=~(e-1),i=0;16>i;i++)t=o&(r[i]^n[i]),r[i]^=t,n[i]^=t}function x(r,n){var e,t,o,i=hn(),a=hn();for(e=0;16>e;e++)a[e]=n[e];for(d(a),d(a),d(a),t=0;2>t;t++){for(i[0]=a[0]-65517,e=1;15>e;e++)i[e]=a[e]-65535-(i[e-1]>>16&1),i[e-1]&=65535;i[15]=a[15]-32767-(i[14]>>16&1),o=i[15]>>16&1,i[14]&=65535,E(a,i,1-o)}for(e=0;16>e;e++)r[2*e]=255&a[e],r[2*e+1]=a[e]>>8}function m(r,n){var e=new Uint8Array(32),t=new Uint8Array(32);return x(e,r),x(t,n),u(e,0,t,0)}function B(r){var n=new Uint8Array(32);return x(n,r),1&n[0]}function S(r,n){var e;for(e=0;16>e;e++)r[e]=n[2*e]+(n[2*e+1]<<8);r[15]&=32767}function T(r,n,e){var t;for(t=0;16>t;t++)r[t]=n[t]+e[t]|0}function 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r,n,e,t=0,o=0,i=0,a=0,f=65535;for(e=0;e<arguments.length;e++)r=arguments[e].lo,n=arguments[e].hi,t+=r&f,o+=r>>>16,i+=n&f,a+=n>>>16;return o+=t>>>16,i+=o>>>16,a+=i>>>16,new sn(i&f|a<<16,t&f|o<<16)}function G(r,n){return new sn(r.hi>>>n,r.lo>>>n|r.hi<<32-n)}function I(){var r,n=0,e=0;for(r=0;r<arguments.length;r++)n^=arguments[r].lo,e^=arguments[r].hi;return new sn(e,n)}function Z(r,n){var e,t,o=32-n;return 32>n?(e=r.hi>>>n|r.lo<<o,t=r.lo>>>n|r.hi<<o):64>n&&(e=r.lo>>>n|r.hi<<o,t=r.hi>>>n|r.lo<<o),new sn(e,t)}function j(r,n,e){var t=r.hi&n.hi^~r.hi&e.hi,o=r.lo&n.lo^~r.lo&e.lo;return new sn(t,o)}function V(r,n,e){var t=r.hi&n.hi^r.hi&e.hi^n.hi&e.hi,o=r.lo&n.lo^r.lo&e.lo^n.lo&e.lo;return new sn(t,o)}function q(r){return I(Z(r,28),Z(r,34),Z(r,39))}function X(r){return I(Z(r,14),Z(r,18),Z(r,41))}function D(r){return I(Z(r,1),Z(r,8),G(r,7))}function H(r){return I(Z(r,19),Z(r,61),G(r,6))}function J(r,n,e){var o,a,f,u=[],c=[],w=[],y=[];for(a=0;8>a;a++)u[a]=w[a]=t(r,8*a);for(var 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Uint8Array(64),f=new Uint8Array(64),u=new Uint8Array(64),c=new Float64Array(64),w=[hn(),hn(),hn(),hn()];Q(a,t,32),a[0]&=248,a[31]&=127,a[31]|=64;var y=e+64;for(o=0;e>o;o++)r[64+o]=n[o];for(o=0;32>o;o++)r[32+o]=a[32+o];for(Q(u,r.subarray(32),e+32),an(u),en(w,u),rn(r,w),o=32;64>o;o++)r[o]=t[o];for(Q(f,r,e+64),an(f),o=0;64>o;o++)c[o]=0;for(o=0;32>o;o++)c[o]=u[o];for(o=0;32>o;o++)for(i=0;32>i;i++)c[o+i]+=f[o]*a[i];return on(r.subarray(32),c),y}function un(r,n){var e=hn(),t=hn(),o=hn(),i=hn(),a=hn(),f=hn(),u=hn();return U(r[2],An),S(r[1],n),C(o,r[1]),K(i,o,Un),Y(o,o,r[2]),T(i,r[2],i),C(a,i),C(f,a),K(u,f,a),K(e,u,o),K(e,e,i),R(e,e),K(e,e,o),K(e,e,i),K(e,e,i),K(r[0],e,i),C(t,r[0]),K(t,t,i),m(t,o)&&K(r[0],r[0],mn),C(t,r[0]),K(t,t,i),m(t,o)?-1:(B(r[0])===n[31]>>7&&Y(r[0],pn,r[0]),K(r[3],r[0],r[1]),0)}function cn(r,n,e,t){var o,i,a=new Uint8Array(32),f=new Uint8Array(64),c=[hn(),hn(),hn(),hn()],w=[hn(),hn(),hn(),hn()];if(i=-1,64>e)return-1;if(un(w,t))return-1;for(o=0;e>o;o++)r[o]=n[o];for(o=0;32>o;o++)r[o+32]=t[o];if(Q(f,r,e),an(f),nn(c,w,f),en(w,n.subarray(32)),W(c,w),rn(a,c),e-=64,u(n,0,a,0)){for(o=0;e>o;o++)r[o]=0;return-1}for(o=0;e>o;o++)r[o]=n[o+64];return i=e}function wn(r,n){if(r.length!==Rn)throw new Error("bad key size");if(n.length!==kn)throw new Error("bad nonce size")}function yn(r,n){if(r.length!==On)throw new Error("bad public key size");if(n.length!==Mn)throw new Error("bad secret key size")}function ln(){for(var r,n={}.toString,e=0;e<arguments.length;e++)if("[object Uint8Array]"!==(r=n.call(arguments[e])))throw new TypeError("unexpected type "+r+", use Uint8Array")}var sn=function(r,n){this.hi=0|r,this.lo=0|n},hn=function(r){var n,e=new Float64Array(16);if(r)for(n=0;n<r.length;n++)e[n]=r[n];return e},gn=function(){throw new Error("no PRNG")},vn=new Uint8Array(16),bn=new Uint8Array(32);bn[0]=9;var pn=hn(),An=hn([1]),_n=hn([56129,1]),Un=hn([30883,4953,19914,30187,55467,16705,2637,112,59544,30585,16505,36039,65139,11119,27886,20995]),dn=hn([61785,9906,39828,60374,45398,33411,5274,224,53552,61171,33010,6542,64743,22239,55772,9222]),En=hn([54554,36645,11616,51542,42930,38181,51040,26924,56412,64982,57905,49316,21502,52590,14035,8553]),xn=hn([26200,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214]),mn=hn([41136,18958,6951,50414,58488,44335,6150,12099,55207,15867,153,11085,57099,20417,9344,11139]),Bn=new Uint8Array([101,120,112,97,110,100,32,51,50,45,98,121,116,101,32,107]),Sn=new Uint32Array([5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,252]),Tn=A,Yn=_,Kn=[new sn(1116352408,3609767458),new sn(1899447441,602891725),new sn(3049323471,3964484399),new sn(3921009573,2173295548),new sn(961987163,4081628472),new sn(1508970993,3053834265),new sn(2453635748,2937671579),new sn(2870763221,3664609560),new sn(3624381080,2734883394),new sn(310598401,1164996542),new sn(607225278,1323610764),new sn(1426881987,3590304994),new sn(1925078388,4068182383),new sn(2162078206,991336113),new sn(2614888103,633803317),new sn(3248222580,3479774868),new sn(3835390401,2666613458),new sn(4022224774,944711139),new sn(264347078,2341262773),new sn(604807628,2007800933),new sn(770255983,1495990901),new sn(1249150122,1856431235),new sn(1555081692,3175218132),new sn(1996064986,2198950837),new sn(2554220882,3999719339),new sn(2821834349,766784016),new sn(2952996808,2566594879),new sn(3210313671,3203337956),new sn(3336571891,1034457026),new sn(3584528711,2466948901),new sn(113926993,3758326383),new sn(338241895,168717936),new sn(666307205,1188179964),new sn(773529912,1546045734),new sn(1294757372,1522805485),new sn(1396182291,2643833823),new sn(1695183700,2343527390),new sn(1986661051,1014477480),new sn(2177026350,1206759142),new sn(2456956037,344077627),new sn(2730485921,1290863460),new sn(2820302411,3158454273),new sn(3259730800,3505952657),new sn(3345764771,106217008),new sn(3516065817,3606008344),new sn(3600352804,1432725776),new sn(4094571909,1467031594),new sn(275423344,851169720),new sn(430227734,3100823752),new sn(506948616,1363258195),new sn(659060556,3750685593),new sn(883997877,3785050280),new sn(958139571,3318307427),new sn(1322822218,3812723403),new sn(1537002063,2003034995),new sn(1747873779,3602036899),new sn(1955562222,1575990012),new sn(2024104815,1125592928),new sn(2227730452,2716904306),new sn(2361852424,442776044),new sn(2428436474,593698344),new sn(2756734187,3733110249),new sn(3204031479,2999351573),new sn(3329325298,3815920427),new sn(3391569614,3928383900),new sn(3515267271,566280711),new sn(3940187606,3454069534),new sn(4118630271,4000239992),new sn(116418474,1914138554),new sn(174292421,2731055270),new sn(289380356,3203993006),new sn(460393269,320620315),new sn(685471733,587496836),new sn(852142971,1086792851),new sn(1017036298,365543100),new sn(1126000580,2618297676),new sn(1288033470,3409855158),new sn(1501505948,4234509866),new sn(1607167915,987167468),new sn(1816402316,1246189591)],Cn=new Uint8Array([106,9,230,103,243,188,201,8,187,103,174,133,132,202,167,59,60,110,243,114,254,148,248,43,165,79,245,58,95,29,54,241,81,14,82,127,173,230,130,209,155,5,104,140,43,62,108,31,31,131,217,171,251,65,189,107,91,224,205,25,19,126,33,121]),Ln=new Float64Array([237,211,245,92,26,99,18,88,214,156,247,162,222,249,222,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16]),Rn=32,kn=24,zn=32,Pn=16,Fn=32,Nn=32,On=32,Mn=32,Gn=32,In=kn,Zn=zn,jn=Pn,Vn=64,qn=32,Xn=64,Dn=64;r.lowlevel={crypto_stream_xor:g,crypto_stream:h,crypto_stream_salsa20_xor:l,crypto_stream_salsa20:s,crypto_onetimeauth:b,crypto_onetimeauth_verify:p,crypto_verify_16:f,crypto_verify_32:u,crypto_secretbox:A,crypto_secretbox_open:_,crypto_scalarmult:k,crypto_scalarmult_base:z,crypto_box_beforenm:F,crypto_box_afternm:Tn,crypto_box:N,crypto_box_open:O,crypto_box_keypair:P,crypto_hash:Q,crypto_hashblocks:J,crypto_sign:fn,crypto_sign_keypair:tn,crypto_sign_open:cn,crypto_secretbox_KEYBYTES:Rn,crypto_secretbox_NONCEBYTES:kn,crypto_secretbox_ZEROBYTES:zn,crypto_secretbox_BOXZEROBYTES:Pn,crypto_scalarmult_BYTES:Fn,crypto_scalarmult_SCALARBYTES:Nn,crypto_box_PUBLICKEYBYTES:On,crypto_box_SECRETKEYBYTES:Mn,crypto_box_BEFORENMBYTES:Gn,crypto_box_NONCEBYTES:In,crypto_box_ZEROBYTES:Zn,crypto_box_BOXZEROBYTES:jn,crypto_sign_BYTES:Vn,crypto_sign_PUBLICKEYBYTES:qn,crypto_sign_SECRETKEYBYTES:Xn,crypto_hash_BYTES:Dn},r.util={},r.util.decodeUTF8=function(r){var n,e=unescape(encodeURIComponent(r)),t=new Uint8Array(e.length);for(n=0;n<e.length;n++)t[n]=e.charCodeAt(n);return t},r.util.encodeUTF8=function(r){var n,e=[];for(n=0;n<r.length;n++)e.push(String.fromCharCode(r[n]));return decodeURIComponent(escape(e.join("")))},r.util.encodeBase64=function(r){if("undefined"==typeof btoa)return new Buffer(r).toString("base64");var n,e=[],t=r.length;for(n=0;t>n;n++)e.push(String.fromCharCode(r[n]));return btoa(e.join(""))},r.util.decodeBase64=function(r){if("undefined"==typeof atob)return new Uint8Array(Array.prototype.slice.call(new Buffer(r,"base64"),0));var n,e=atob(r),t=new Uint8Array(e.length);for(n=0;n<e.length;n++)t[n]=e.charCodeAt(n);return t},r.randomBytes=function(r){var n=new Uint8Array(r);return gn(n,r),n},r.secretbox=function(r,n,e){ln(r,n,e),wn(e,n);for(var t=new Uint8Array(zn+r.length),o=new Uint8Array(t.length),i=0;i<r.length;i++)t[i+zn]=r[i];return 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r.secretbox.open(n,e,i)},r.box.open.after=r.secretbox.open,r.box.keyPair=function(){var r=new Uint8Array(On),n=new Uint8Array(Mn);return P(r,n),{publicKey:r,secretKey:n}},r.box.keyPair.fromSecretKey=function(r){if(ln(r),r.length!==Mn)throw new Error("bad secret key size");var n=new Uint8Array(On);return z(n,r),{publicKey:n,secretKey:r}},r.box.publicKeyLength=On,r.box.secretKeyLength=Mn,r.box.sharedKeyLength=Gn,r.box.nonceLength=In,r.box.overheadLength=r.secretbox.overheadLength,r.sign=function(r,n){if(ln(r,n),n.length!==Xn)throw new Error("bad secret key size");var e=new Uint8Array(Vn+r.length);fn(e,r,r.length,n);for(var t=new Uint8Array(Vn),o=0;o<t.length;o++)t[o]=e[o];return t},r.sign.open=function(r,n,e){if(ln(r,n,e),n.length!==Vn)throw new Error("bad signature size");if(e.length!==qn)throw new Error("bad public key size");var t,o=new Uint8Array(Vn+r.length),i=new Uint8Array(Vn+r.length);for(t=0;Vn>t;t++)o[t]=n[t];for(t=0;t<r.length;t++)o[t+Vn]=r[t];var a=cn(i,o,o.length,e);return 0>a?!1:i.subarray(0,a)},r.sign.keyPair=function(){var r=new Uint8Array(qn),n=new Uint8Array(Xn);return tn(r,n),{publicKey:r,secretKey:n}},r.sign.keyPair.fromSecretKey=function(r){if(ln(r),r.length!==Xn)throw new Error("bad secret key size");var n,e=new Uint8Array(qn);for(n=0;32>n;n++)e[n]=r[32+n];return{publicKey:e,secretKey:r}},r.sign.publicKeyLength=qn,r.sign.secretKeyLength=Xn,r.sign.signatureLength=Vn,r.hash=function(r){ln(r);var n=new Uint8Array(Dn);return Q(n,r,r.length),n},r.hash.hashLength=Dn,r.verify=function(r,n){return ln(r,n),0===r.length||0===n.length?!1:r.length!==n.length?!1:0===a(r,0,n,0,r.length)?!0:!1},r.setPRNG=function(r){gn=r},function(){var n;"undefined"!=typeof window?(window.crypto&&window.crypto.getRandomValues?n=window.crypto:window.msCrypto&&window.msCrypto.getRandomValues&&(n=window.msCrypto),n&&r.setPRNG(function(r,e){var t,o=new Uint8Array(e);for(n.getRandomValues(o),t=0;e>t;t++)r[t]=o[t]})):"undefined"!=typeof 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$(r,n,e){var t;for(t=0;4>t;t++)E(r[t],n[t],e)}function rn(r,n){var e=hn(),t=hn(),o=hn();L(o,n[2]),K(e,n[0],o),K(t,n[1],o),x(r,t),r[31]^=B(e)<<7}function nn(r,n,e){var t,o;for(U(r[0],pn),U(r[1],An),U(r[2],An),U(r[3],pn),o=255;o>=0;--o)t=e[o/8|0]>>(7&o)&1,$(r,n,t),W(n,r),W(r,r),$(r,n,t)}function en(r,n){var e=[hn(),hn(),hn(),hn()];U(e[0],En),U(e[1],xn),U(e[2],An),K(e[3],En,xn),nn(r,e,n)}function tn(r,n){var e,t=new Uint8Array(64),o=[hn(),hn(),hn(),hn()];for(gn(n,32),Q(t,n,32),t[0]&=248,t[31]&=127,t[31]|=64,en(o,t),rn(r,o),e=0;32>e;e++)n[e+32]=r[e];return 0}function on(r,n){var e,t,o,i;for(t=63;t>=32;--t){for(e=0,o=t-32,i=t-12;i>o;++o)n[o]+=e-16*n[t]*Ln[o-(t-32)],e=n[o]+128>>8,n[o]-=256*e;n[o]+=e,n[t]=0}for(e=0,o=0;32>o;o++)n[o]+=e-(n[31]>>4)*Ln[o],e=n[o]>>8,n[o]&=255;for(o=0;32>o;o++)n[o]-=e*Ln[o];for(t=0;32>t;t++)n[t+1]+=n[t]>>8,r[t]=255&n[t]}function an(r){var n,e=new Float64Array(64);for(n=0;64>n;n++)e[n]=r[n];for(n=0;64>n;n++)r[n]=0;on(r,e)}function fn(r,n,e,t){var o,i,a=new Uint8Array(64),f=new Uint8Array(64),u=new Uint8Array(64),c=new Float64Array(64),w=[hn(),hn(),hn(),hn()];Q(a,t,32),a[0]&=248,a[31]&=127,a[31]|=64;var y=e+64;for(o=0;e>o;o++)r[64+o]=n[o];for(o=0;32>o;o++)r[32+o]=a[32+o];for(Q(u,r.subarray(32),e+32),an(u),en(w,u),rn(r,w),o=32;64>o;o++)r[o]=t[o];for(Q(f,r,e+64),an(f),o=0;64>o;o++)c[o]=0;for(o=0;32>o;o++)c[o]=u[o];for(o=0;32>o;o++)for(i=0;32>i;i++)c[o+i]+=f[o]*a[i];return on(r.subarray(32),c),y}function un(r,n){var e=hn(),t=hn(),o=hn(),i=hn(),a=hn(),f=hn(),u=hn();return U(r[2],An),S(r[1],n),C(o,r[1]),K(i,o,Un),Y(o,o,r[2]),T(i,r[2],i),C(a,i),C(f,a),K(u,f,a),K(e,u,o),K(e,e,i),R(e,e),K(e,e,o),K(e,e,i),K(e,e,i),K(r[0],e,i),C(t,r[0]),K(t,t,i),m(t,o)&&K(r[0],r[0],mn),C(t,r[0]),K(t,t,i),m(t,o)?-1:(B(r[0])===n[31]>>7&&Y(r[0],pn,r[0]),K(r[3],r[0],r[1]),0)}function cn(r,n,e,t){var o,i,a=new Uint8Array(32),f=new Uint8Array(64),c=[hn(),hn(),hn(),hn()],w=[hn(),hn(),hn(),hn()];if(i=-1,64>e)return-1;if(un(w,t))return-1;for(o=0;e>o;o++)r[o]=n[o];for(o=0;32>o;o++)r[o+32]=t[o];if(Q(f,r,e),an(f),nn(c,w,f),en(w,n.subarray(32)),W(c,w),rn(a,c),e-=64,u(n,0,a,0)){for(o=0;e>o;o++)r[o]=0;return-1}for(o=0;e>o;o++)r[o]=n[o+64];return i=e}function wn(r,n){if(r.length!==Rn)throw new Error("bad key size");if(n.length!==kn)throw new Error("bad nonce size")}function yn(r,n){if(r.length!==On)throw new Error("bad public key size");if(n.length!==Mn)throw new Error("bad secret key size")}function ln(){for(var r,n={}.toString,e=0;e<arguments.length;e++)if("[object Uint8Array]"!==(r=n.call(arguments[e])))throw new TypeError("unexpected type "+r+", use Uint8Array")}var sn=function(r,n){this.hi=0|r,this.lo=0|n},hn=function(r){var n,e=new Float64Array(16);if(r)for(n=0;n<r.length;n++)e[n]=r[n];return e},gn=function(){throw new Error("no PRNG")},vn=new Uint8Array(16),bn=new Uint8Array(32);bn[0]=9;var pn=hn(),An=hn([1]),_n=hn([56129,1]),Un=hn([30883,4953,19914,30187,55467,16705,2637,112,59544,30585,16505,36039,65139,11119,27886,20995]),dn=hn([61785,9906,39828,60374,45398,33411,5274,224,53552,61171,33010,6542,64743,22239,55772,9222]),En=hn([54554,36645,11616,51542,42930,38181,51040,26924,56412,64982,57905,49316,21502,52590,14035,8553]),xn=hn([26200,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214,26214]),mn=hn([41136,18958,6951,50414,58488,44335,6150,12099,55207,15867,153,11085,57099,20417,9344,11139]),Bn=new Uint8Array([101,120,112,97,110,100,32,51,50,45,98,121,116,101,32,107]),Sn=new Uint32Array([5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,252]),Tn=A,Yn=_,Kn=[new sn(1116352408,3609767458),new sn(1899447441,602891725),new sn(3049323471,3964484399),new sn(3921009573,2173295548),new sn(961987163,4081628472),new sn(1508970993,3053834265),new sn(2453635748,2937671579),new sn(2870763221,3664609560),new sn(3624381080,2734883394),new sn(310598401,1164996542),new sn(607225278,1323610764),new sn(1426881987,3590304994),new sn(1925078388,4068182383),new sn(2162078206,991336113),new sn(2614888103,633803317),new sn(3248222580,3479774868),new sn(3835390401,2666613458),new sn(4022224774,944711139),new sn(264347078,2341262773),new sn(604807628,2007800933),new sn(770255983,1495990901),new sn(1249150122,1856431235),new sn(1555081692,3175218132),new sn(1996064986,2198950837),new sn(2554220882,3999719339),new sn(2821834349,766784016),new sn(2952996808,2566594879),new sn(3210313671,3203337956),new sn(3336571891,1034457026),new sn(3584528711,2466948901),new sn(113926993,3758326383),new sn(338241895,168717936),new sn(666307205,1188179964),new sn(773529912,1546045734),new sn(1294757372,1522805485),new sn(1396182291,2643833823),new sn(1695183700,2343527390),new sn(1986661051,1014477480),new sn(2177026350,1206759142),new sn(2456956037,344077627),new sn(2730485921,1290863460),new sn(2820302411,3158454273),new sn(3259730800,3505952657),new sn(3345764771,106217008),new sn(3516065817,3606008344),new sn(3600352804,1432725776),new sn(4094571909,1467031594),new sn(275423344,851169720),new sn(430227734,3100823752),new sn(506948616,1363258195),new sn(659060556,3750685593),new sn(883997877,3785050280),new sn(958139571,3318307427),new sn(1322822218,3812723403),new sn(1537002063,2003034995),new sn(1747873779,3602036899),new sn(1955562222,1575990012),new sn(2024104815,1125592928),new sn(2227730452,2716904306),new sn(2361852424,442776044),new sn(2428436474,593698344),new sn(2756734187,3733110249),new sn(3204031479,2999351573),new sn(3329325298,3815920427),new sn(3391569614,3928383900),new sn(3515267271,566280711),new sn(3940187606,3454069534),new sn(4118630271,4000239992),new sn(116418474,1914138554),new sn(174292421,2731055270),new sn(289380356,3203993006),new sn(460393269,320620315),new sn(685471733,587496836),new sn(852142971,1086792851),new sn(1017036298,365543100),new sn(1126000580,2618297676),new sn(1288033470,3409855158),new sn(1501505948,4234509866),new sn(1607167915,987167468),new sn(1816402316,1246189591)],Cn=new Uint8Array([106,9,230,103,243,188,201,8,187,103,174,133,132,202,167,59,60,110,243,114,254,148,248,43,165,79,245,58,95,29,54,241,81,14,82,127,173,230,130,209,155,5,104,140,43,62,108,31,31,131,217,171,251,65,189,107,91,224,205,25,19,126,33,121]),Ln=new Float64Array([237,211,245,92,26,99,18,88,214,156,247,162,222,249,222,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16]),Rn=32,kn=24,zn=32,Pn=16,Fn=32,Nn=32,On=32,Mn=32,Gn=32,In=kn,Zn=zn,jn=Pn,Vn=64,qn=32,Xn=64,Dn=64;r.lowlevel={crypto_stream_xor:g,crypto_stream:h,crypto_stream_salsa20_xor:l,crypto_stream_salsa20:s,crypto_onetimeauth:b,crypto_onetimeauth_verify:p,crypto_verify_16:f,crypto_verify_32:u,crypto_secretbox:A,crypto_secretbox_open:_,crypto_scalarmult:k,crypto_scalarmult_base:z,crypto_box_beforenm:F,crypto_box_afternm:Tn,crypto_box:N,crypto_box_open:O,crypto_box_keypair:P,crypto_hash:Q,crypto_hashblocks:J,crypto_sign:fn,crypto_sign_keypair:tn,crypto_sign_open:cn,crypto_secretbox_KEYBYTES:Rn,crypto_secretbox_NONCEBYTES:kn,crypto_secretbox_ZEROBYTES:zn,crypto_secretbox_BOXZEROBYTES:Pn,crypto_scalarmult_BYTES:Fn,crypto_scalarmult_SCALARBYTES:Nn,crypto_box_PUBLICKEYBYTES:On,crypto_box_SECRETKEYBYTES:Mn,crypto_box_BEFORENMBYTES:Gn,crypto_box_NONCEBYTES:In,crypto_box_ZEROBYTES:Zn,crypto_box_BOXZEROBYTES:jn,crypto_sign_BYTES:Vn,crypto_sign_PUBLICKEYBYTES:qn,crypto_sign_SECRETKEYBYTES:Xn,crypto_hash_BYTES:Dn},r.util={},r.util.decodeUTF8=function(r){var n,e=unescape(encodeURIComponent(r)),t=new Uint8Array(e.length);for(n=0;n<e.length;n++)t[n]=e.charCodeAt(n);return t},r.util.encodeUTF8=function(r){var n,e=[];for(n=0;n<r.length;n++)e.push(String.fromCharCode(r[n]));return decodeURIComponent(escape(e.join("")))},r.util.encodeBase64=function(r){if("undefined"==typeof btoa)return new Buffer(r).toString("base64");var n,e=[],t=r.length;for(n=0;t>n;n++)e.push(String.fromCharCode(r[n]));return btoa(e.join(""))},r.util.decodeBase64=function(r){if("undefined"==typeof atob)return new Uint8Array(Array.prototype.slice.call(new Buffer(r,"base64"),0));var n,e=atob(r),t=new Uint8Array(e.length);for(n=0;n<e.length;n++)t[n]=e.charCodeAt(n);return t},r.randomBytes=function(r){var n=new Uint8Array(r);return gn(n,r),n},r.secretbox=function(r,n,e){ln(r,n,e),wn(e,n);for(var t=new Uint8Array(zn+r.length),o=new Uint8Array(t.length),i=0;i<r.length;i++)t[i+zn]=r[i];return A(o,t,t.length,n,e),o.subarray(Pn)},r.secretbox.open=function(r,n,e){ln(r,n,e),wn(e,n);for(var t=new Uint8Array(Pn+r.length),o=new Uint8Array(t.length),i=0;i<r.length;i++)t[i+Pn]=r[i];return t.length<32?!1:0!==_(o,t,t.length,n,e)?!1:o.subarray(zn)},r.secretbox.keyLength=Rn,r.secretbox.nonceLength=kn,r.secretbox.overheadLength=Pn,r.scalarMult=function(r,n){if(ln(r,n),r.length!==Nn)throw new Error("bad n size");if(n.length!==Fn)throw new Error("bad p size");var e=new Uint8Array(Fn);return k(e,r,n),e},r.scalarMult.base=function(r){if(ln(r),r.length!==Nn)throw new Error("bad n size");var n=new Uint8Array(Fn);return z(n,r),n},r.scalarMult.scalarLength=Nn,r.scalarMult.groupElementLength=Fn,r.box=function(n,e,t,o){var i=r.box.before(t,o);return r.secretbox(n,e,i)},r.box.before=function(r,n){ln(r,n),yn(r,n);var e=new Uint8Array(Gn);return F(e,r,n),e},r.box.after=r.secretbox,r.box.open=function(n,e,t,o){var i=r.box.before(t,o);return r.secretbox.open(n,e,i)},r.box.open.after=r.secretbox.open,r.box.keyPair=function(){var r=new Uint8Array(On),n=new Uint8Array(Mn);return P(r,n),{publicKey:r,secretKey:n}},r.box.keyPair.fromSecretKey=function(r){if(ln(r),r.length!==Mn)throw new Error("bad secret key size");var n=new Uint8Array(On);return z(n,r),{publicKey:n,secretKey:r}},r.box.publicKeyLength=On,r.box.secretKeyLength=Mn,r.box.sharedKeyLength=Gn,r.box.nonceLength=In,r.box.overheadLength=r.secretbox.overheadLength,r.sign=function(r,n){if(ln(r,n),n.length!==Xn)throw new Error("bad secret key size");var e=new Uint8Array(Vn+r.length);fn(e,r,r.length,n);for(var t=new Uint8Array(Vn),o=0;o<t.length;o++)t[o]=e[o];return t},r.sign.open=function(r,n,e){if(ln(r,n,e),n.length!==Vn)throw new Error("bad signature size");if(e.length!==qn)throw new Error("bad public key size");var t,o=new Uint8Array(Vn+r.length),i=new Uint8Array(Vn+r.length);for(t=0;Vn>t;t++)o[t]=n[t];for(t=0;t<r.length;t++)o[t+Vn]=r[t];var a=cn(i,o,o.length,e);return 0>a?!1:i.subarray(0,a)},r.sign.keyPair=function(){var r=new Uint8Array(qn),n=new Uint8Array(Xn);return tn(r,n),{publicKey:r,secretKey:n}},r.sign.keyPair.fromSecretKey=function(r){if(ln(r),r.length!==Xn)throw new Error("bad secret key size");var n,e=new Uint8Array(qn);for(n=0;32>n;n++)e[n]=r[32+n];return{publicKey:e,secretKey:r}},r.sign.publicKeyLength=qn,r.sign.secretKeyLength=Xn,r.sign.signatureLength=Vn,r.hash=function(r){ln(r);var n=new Uint8Array(Dn);return Q(n,r,r.length),n},r.hash.hashLength=Dn,r.verify=function(r,n){return ln(r,n),0===r.length||0===n.length?!1:r.length!==n.length?!1:0===a(r,0,n,0,r.length)?!0:!1},r.setPRNG=function(r){gn=r},function(){var n;"undefined"!=typeof window?(window.crypto&&window.crypto.getRandomValues?n=window.crypto:window.msCrypto&&window.msCrypto.getRandomValues&&(n=window.msCrypto),n&&r.setPRNG(function(r,e){var t,o=new Uint8Array(e);for(n.getRandomValues(o),t=0;e>t;t++)r[t]=o[t]})):"undefined"!=typeof require&&(n=require("crypto"),n&&r.setPRNG(function(r,e){var t,o=n.randomBytes(e);for(t=0;e>t;t++)r[t]=o[t]}))}()}("undefined"!=typeof module&&module.exports?module.exports:window.nacl=window.nacl||{});

                nacl = window.nacl;
                self.postMessage(nacl.secretbox.open(
                    message.data.encrypted,
                    message.data.nonce,
                    message.data.key));
            };
        </script>
        <script>
            var myLockCore = (function(){
                "use strict";
                //internal key
                var key = {
                    "secretKey": null,
                    "publicKey": null,
                    "username": null,
                };

                //encode username to Base58
                function _encodeUsername(publicKey, salt){
                    var tmp = new Uint8Array(40);
                    tmp.set(new Uint8Array(publicKey), 0);
                    tmp.set(new Uint8Array(salt), 32);
                    return "myLock_" + Base58.encode(tmp);
                }

                //decode username from Base58 to {publicKey:<Uint8Array>, salt:<Uint8Array>}
                //returns undefined if invalid username
                function _decodeUsername(username){
                    if(username.substring(0, 7) === "myLock_"){
                        username = username.substring(7);
                    }
	                var tmp = Base58.decode(username);
                    if(tmp.byteLength === 40){
                        return {
	                        "publicKey": tmp.subarray(0, 32),
	                        "salt": tmp.subarray(32, 40),
                        };
                    }
                    return undefined;
                }

                //default callbacks (do nothing)
                this.onUsernameDone = function(error){};
                this.onEncryptDone = function(data, error){};
                this.onEncryptProgress = function(progress){};
                this.onDecryptDone = function(data, error){};
                this.onDecryptProgress = function(progress){};

                //set keys
                this.setUsername = function(username, passphrase){
                    //generate a new username
                    if(username === undefined){
                        //passphrases must be over 40 charaters long
                        if(passphrase.length < 40){
                            this.onUsernameDone("Secret phrase needs 40+ characters");
                            return;
                        }
                        var salt = nacl.randomBytes(8);
                    }
                    //validate an existing username
                    else{
                        var tmpUser = _decodeUsername(username);
                        if(tmpUser === undefined){
                            this.onUsernameDone("Bad username or secret phrase");
                            return;
                        }
                        var salt = tmpUser.salt;
                    }

                    //generate scrypt secretKey from salt and hashed passphrase using a webworker
                    var onScryptDone = this.onUsernameDone;
                    var hashed_passphrase = nacl.hash(nacl.util.decodeUTF8(passphrase));
                    var blob = new Blob([
                        document.getElementById('scrypt_worker').textContent
                    ], {"type": "text/javascript"});
                    var worker = new Worker(window.URL.createObjectURL(blob));
                    worker.onmessage = function(message){
                        //determine the keyPair and username
                        var scryptKeys = nacl.box.keyPair.fromSecretKey(nacl.util.decodeBase64(message.data));
                        var scryptUser = _encodeUsername(scryptKeys.publicKey, salt);

                        //if the username was already given, validate it
                        if(username !== undefined){
                            if(username.substring(0, 7) !== "myLock_"){
                                username = "myLock_" + username;
                            }
                            if(username !== scryptUser){
                                onScryptDone("Bad username or secret phrase");
                                return;
                            }
                        }

                        //set the internal session keys
                        key['secretKey'] = scryptKeys.secretKey;
                        key['publicKey'] = scryptKeys.publicKey;
                        key['username'] = scryptUser;

                        //fire the success event
                        onScryptDone();
                    };
                    worker.postMessage({"salt": salt, "key": hashed_passphrase});
                };

                //get username
                this.getUsername = function(){
                    return key.username;
                };

                //encrypt
                this.encrypt = function(filename, file, recipients){
                    this.onEncryptProgress(0);

                    //make sure the user's secret key is set
                    if(key['username'] === null || key['secretKey'] === null){
                        this.onEncryptDone(null, "Not logged in");
                        return;
                    }

                    //make sure there are actually recipients
                    if(recipients.length <= 0){
                        this.onEncryptDone(null, "No recipients set");
                        return;
                    }

                    //generate a file encryption key and set chunks to 200kB
                    var chunkSize = 200000;
                    var fileKey = nacl.randomBytes(32);
                    var fileNonce = nacl.randomBytes(24);

                    //encrypt a userInfo for each recipient in this format:
                    //{
                    //    "ephemeralPublicKey": <Base58>,
                    //    "userInfoNonce": <Base58>,
                    //    "userInfoEncrypted": {
                    //        "sender": <username>,
                    //        "fileInfo": {
                    //            "fileInfoNonce": <Base58>,
                    //            "fileInfoEncrypted": {
                    //                "chunkSize": <Integer>,
                    //                "fileName": <String>,
                    //                "fileSize": <Integer>,
                    //                "fileType": <MIME-type>,
                    //                "fileKey": <Base58>,
                    //                "fileNonce": <Base58>,
                    //            } (encrypted with recipient.publicKey, fileInfoNonce, and sender.secretKey),
                    //        },
                    //    } (encrypted with recipient.publicKey, userInfoNonce, and ephemeral.secretKey),
                    //}
                    var userInfos = [];
                    for(var i = 0; i < recipients.length; i++){

                        //make sure this is a valid username
                        var tmpUser = _decodeUsername(recipients[i]);
                        if(tmpUser === undefined){
                            this.onEncryptDone("Some recipients aren't valid");
                            return;
                        }

                        //encrypt the fileKey with the sender's signature
                        var fileInfoNonce = nacl.randomBytes(24);
                        var fileInfoEncrypted = nacl.box(
                            nacl.util.decodeUTF8(JSON.stringify({
                                "chunkSize": chunkSize,
                                "fileName": filename,
                                "fileSize": file.size,
                                "fileType": file.type,
                                "fileKey": Base58.encode(fileKey),
                                "fileNonce": Base58.encode(fileNonce),
                            })),
                            fileInfoNonce,
                            tmpUser.publicKey,
                            key['secretKey']);

                        //encode the userInfo to unencrypted Uint8Array
                        var userInfo = nacl.util.decodeUTF8(JSON.stringify({
                            "sender": key['username'],
                            "fileInfo": {
                                "fileInfoNonce": Base58.encode(fileInfoNonce),
                                "fileInfoEncrypted": Base58.encode(fileInfoEncrypted),
                            },
                        }));

                        //encrypt the userInfo
                        var userEphemeral = nacl.box.keyPair();
                        var userNonce = nacl.randomBytes(24);
                        var userInfoEncrypted = nacl.box(
                            userInfo,
                            userNonce,
                            tmpUser.publicKey,
                            userEphemeral.secretKey);

                        //Base58 encode the userInfo, nonce, and ephemeral into a Base58 key
                        userInfos.push(Base58.encode(nacl.util.decodeUTF8(JSON.stringify({
                            "ephemeralPublicKey": Base58.encode(userEphemeral.publicKey),
                            "userInfoNonce": Base58.encode(userNonce),
                            "userInfoEncrypted": Base58.encode(userInfoEncrypted),
                        }))));
                    }

                    //split each userInfo in the header with a period and
                    //denote the end of the header with two periods
                    var header = nacl.util.decodeUTF8(userInfos.join(".") + "..");

                    //read the file into an array buffer
                    //TODO: chunk the encryption
                    var onprogress = this.onEncryptProgress;
                    var ondone = this.onEncryptDone;
                    var reader = new FileReader();
                    reader.onload = function(){

                        //calculate how many chunks of 10kB
                        var rawArray = new Uint8Array(reader.result);
                        var numChunks = Math.ceil(rawArray.byteLength / chunkSize);
                        var curNonce = fileNonce;

                        //each chunk has an additional 16 bytes when encrypted
                        var encryptedArray = new Uint8Array(rawArray.byteLength + numChunks * (16));

                        //use web worker to encrypt
                        var worker_blob = new Blob([
                            document.getElementById('encrypt_worker').textContent
                        ], {"type": "text/javascript"});
                        var worker = new Worker(window.URL.createObjectURL(worker_blob));

                        function encryptChunk(i){
                            //calculate raw chunk
                            var chunk = rawArray.subarray(i * chunkSize, (i + 1) * chunkSize);
                            curNonce = nacl.hash(curNonce).subarray(0, 24);

                            //listen for chunk encryption completion
                            worker.onmessage = function(message){

                                //populate that chunk of the encrypted array
                                var offset = i * (chunkSize + 16);
                                encryptedArray.set(message.data, offset);

                                //see if you need to process another chunk
                                if(i < numChunks - 1){
                                    onprogress(Math.round(i / numChunks * 100));
                                    encryptChunk(i + 1);
                                }
                                //last chunk
                                else{
                                    //construct the locked file
                                    var blob = new Blob([header, encryptedArray], {
                                        "type": "application/mylock",
                                    });

                                    //fire the success event
                                    onprogress(100);
                                    ondone(blob);
                                }
                            };
                            worker.postMessage({
                                "raw": chunk,
                                "nonce": curNonce,
                                "key": fileKey,
                            });
                        }
                        encryptChunk(0);
                    };
                    reader.readAsArrayBuffer(file);
                };

                //decrypt
                this.decrypt = function(file){
                    this.onDecryptProgress(0);

                    //callback when done reader the file
                    var onprogress = this.onDecryptProgress;
                    var ondone = this.onDecryptDone;
                    function decryptData(data){

                        //split headers into userInfos
                        var userInfos = [];
                        var last = 0;
                        for(var i = 0; i < data.byteLength; i++){
                            //periods denote headers (".".charCodeAt() === 46)
                            if(data[i] === 46){
                                //see if this is the end of the header
                                if(last === i){
                                    last = i + 1;
                                    break;
                                }
                                //try to decode the header
                                try{
                                    userInfos.push(nacl.util.encodeUTF8(data.subarray(last, i)));
                                }
                                //bail out if not decoded
                                catch(e){
                                    console.log(e);
                                    ondone(null, null, null, "Couldn't parse header");
                                    return;
                                }
                                last = i + 1;
                            }
                        }

                        //parse userInfos to the following format:
                        //{
                        //    "sender": <username>,
                        //    "filename": <filename>,
                        //    "fileInfo": {
                        //        "chunkSize": <Integer>,
                        //        "fileName": <String>,
                        //        "fileSize": <Integer>,
                        //        "fileType": <MIME-type>,
                        //        "fileKey": <Base58>,
                        //        "fileNonce": <Base58>,
                        //    },
                        //}
                        var userInfo;
                        for(var i = 0; i < userInfos.length; i++){

                            //try to decode the userInfo
                            try{
                                //get the ephemeral json
                                var tmpInfo = JSON.parse(nacl.util.encodeUTF8(Base58.decode(userInfos[i])));

                                //decrypt the userInfo section
                                tmpInfo = nacl.box.open(
                                    Base58.decode(tmpInfo['userInfoEncrypted']),
                                    Base58.decode(tmpInfo['userInfoNonce']),
                                    Base58.decode(tmpInfo['ephemeralPublicKey']),
                                    key['secretKey']);

                                //skip this header if couldn't decrypt
                                if(tmpInfo === false){
                                    continue;
                                }

                                //convert the userInfo from Uint8Array to json
                                tmpInfo = JSON.parse(nacl.util.encodeUTF8(tmpInfo));
                            }
                            catch(e){
                                console.log(e);
                                ondone(null, null, null, "Couldn't parse header");
                                return;
                            }

                            //validate the sender
                            var sender = _decodeUsername(tmpInfo['sender']);
                            if(sender === undefined){
                                ondone(null, null, null, "Couldn't parse sender");
                                return;
                            }

                            //decrypt the fileInfo
                            try{
                                var tmpFileInfo = nacl.box.open(
                                    Base58.decode(tmpInfo['fileInfo']['fileInfoEncrypted']),
                                    Base58.decode(tmpInfo['fileInfo']['fileInfoNonce']),
                                    sender.publicKey,
                                    key['secretKey']);

                                //skip this header if couldn't decrypt
                                if(tmpFileInfo === false){
                                    throw "Couldn't decrypt fileInfo";
                                }

                                //set filename in the userInfo object
                                tmpInfo['fileInfo'] = JSON.parse(nacl.util.encodeUTF8(tmpFileInfo));
                                tmpInfo['fileInfo']['fileKey'] = Base58.decode(tmpInfo['fileInfo']['fileKey']);
                                tmpInfo['fileInfo']['fileNonce'] = Base58.decode(tmpInfo['fileInfo']['fileNonce'])
                            }
                            catch(e){
                                console.log(e);
                                ondone(null, null, null, "Couldn't parse header");
                                return;
                            }

                            //set userInfo and stop scanning the header
                            userInfo = tmpInfo;
                            break;
                        }

                        //couldn't read any headers, so bail out
                        if(userInfo === undefined){
                            ondone(null, null, null, "Couldn't read any headers");
                            return;
                        }

                        //calculate how many chunks
                        var encryptedArray = data.subarray(last, data.byteLength);
                        var chunkSize = userInfo['fileInfo']['chunkSize'];
                        var numChunks = Math.ceil(encryptedArray.byteLength / (chunkSize + 16));
                        var curNonce = userInfo['fileInfo']['fileNonce'];

                        //filesize doesn't match, so bail out
                        if((data.byteLength - last) - 16 * numChunks !== userInfo['fileInfo']['fileSize']){
                            ondone(null, null, null, "Couldn't decrypt file");
                            return;
                        }

                        //define the decrypted array (remove 16 bytes per chunk)
                        var decryptedArray = new Uint8Array(encryptedArray.byteLength - (16) * numChunks);

                        //use web worker to decrypt
                        var worker_blob = new Blob([
                            document.getElementById('decrypt_worker').textContent
                        ], {"type": "text/javascript"});
                        var worker = new Worker(window.URL.createObjectURL(worker_blob));

                        function decryptChunk(i){
                            //calculate raw nonce subsection
                            curNonce = nacl.hash(curNonce).subarray(0, 24);

                            //calculate raw chunk subsection
                            var chunk = encryptedArray.subarray(
                                i * (chunkSize + 16),
                                (i + 1) * (chunkSize + 16));

                            //listen for decryption completion
                            worker.onmessage = function(message){

                                //decrypt the file with the fileNonce and fileKey
                                if(message.data === false){
                                    ondone(null, null, null, "Couldn't decrypt file");
                                    return;
                                }

                                //populate that chunk of the decrypted array
                                var offset = i * chunkSize;
                                decryptedArray.set(message.data, offset);

                                //see if you need to process another chunk
                                if(i < numChunks - 1){
                                    onprogress(Math.round(i / numChunks * 100));
                                    decryptChunk(i + 1);
                                }
                                //last chunk
                                else{
                                    //create blob and return success
                                    onprogress(100);
                                    ondone(
                                        userInfo['sender'],
                                        userInfo['fileInfo']['fileName'],
                                        new Blob([decryptedArray], {
                                            "type": userInfo['fileInfo']['fileType'],
                                        }));
                                }
                            };
                            worker.postMessage({
                                "encrypted": chunk,
                                "nonce": curNonce,
                                "key": userInfo['fileInfo']['fileKey'],
                            });
                        }
                        decryptChunk(0);
                    }

                    //convert file Blob to Uint8Array
                    var reader = new FileReader();
                    reader.onload = function(){
                        decryptData(new Uint8Array(reader.result));
                    };
                    reader.readAsArrayBuffer(file);
                };
            });
        </script>

        <!-- User Interface -->
        <script>
            var SHOW_ONBOARDING = false;
            var myLock = new myLockCore();

            //remove element helper function
            var delElement = function(elem){
                elem.parentNode.removeChild(elem);
            }

            /*********************/
            /*** Page Switcher ***/
            /*********************/

            //show a particular page
            function showPage(page){

                //hide everything by default
                document.getElementById("login").style.display = "none";
                document.getElementById("header").style.display = "none";
                document.getElementById("main").style.display = "none";
                document.getElementById("send").style.display = "none";
                document.getElementById("receive").style.display = "none";
                document.getElementById("footer").style.display = "none";

                //reset and show login page
                if(page === "login"){
                    document.getElementById("new_secret").value = "";
                    document.getElementById("existing_username").value = "";
                    document.getElementById("existing_secret").value = "";
                    document.getElementById("register_msg").innerHTML = "(this will generate a new username)";
                    document.getElementById("register_msg").className = "";
                    document.getElementById("login_msg").innerHTML = "";
                    document.getElementById("login_msg").className = "";
                    document.getElementById("login").style.display = "inline-block";
                    document.getElementById("footer").style.display = "inline-block";
                    window.onbeforeunload = null;
                }

                //reset and show main page
                else if(page === "main"){
                    document.getElementById("username").value = myLock.getUsername();
                    document.getElementById("header").style.display = "inline-block";
                    document.getElementById("main").style.display = "inline-block";
                    document.getElementById("tutorial_wrapper").style.display = SHOW_ONBOARDING ? "inline-block" : "none";
                    window.onbeforeunload = function(){return "Log out?";};
                }

                //reset and show send page
                else if(page === "send"){
                    document.getElementById("username").value = myLock.getUsername();
                    document.getElementById("header").style.display = "inline-block";
                    document.getElementById("send").style.display = "inline-block";
                    document.getElementById("recip").value = "";
                    window.onbeforeunload = function(){return "Log out?";};
                    //remove all but first recipient input
                    var recipInputs = document.querySelectorAll("input.recip_row");
                    for(var i = 1; i < recipInputs.length; i++){
                        delElement(recipInputs[i]);
                    }
                    //replace the file input (since it can't be cleared)
                    delElement(document.getElementById("raw_data"));
                    document.getElementById("raw_wrapper").innerHTML += '<input id="raw_data" type="file"></input>';
                    bindChangeEncryptionFile();
                    //reset the encryption progress bar
                    document.getElementById("encryption_wrapper").style.display = "none";
                    document.getElementById("encryption_progress").style.width = "0%";
                    document.getElementById("encryption_percent").innerHTML = "0%";
                    document.getElementById("encryption_status").innerHTML = "";
                    document.getElementById("encryption_status").className = "";
                }

                //reset and show receive page
                else if(page === "receive"){
                    document.getElementById("username").value = myLock.getUsername();
                    document.getElementById("header").style.display = "inline-block";
                    document.getElementById("receive").style.display = "inline-block";
                    window.onbeforeunload = function(){return "Log out?";};
                    //replace the file input (since it can't be cleared)
                    delElement(document.getElementById("encrypted_data"));
                    document.getElementById("encrypted_wrapper").innerHTML += '<input id="encrypted_data" type="file"></input>';
                    bindChangeDecryptionFile();
                    //reset the decryption progress bar
                    document.getElementById("decryption_wrapper").style.display = "none";
                    document.getElementById("decryption_progress").style.width = "0%";
                    document.getElementById("decryption_percent").innerHTML = "0%";
                    document.getElementById("decryption_status").innerHTML = "";
                    document.getElementById("decryption_status").className = "";
                }
            }

            /**********************/
            /*** Event Handlers ***/
            /**********************/

            function clickRegister(e){
                e.preventDefault();
                //already pending
                if(document.getElementById("register_msg").innerHTML === "Creating username..."){
                    return;
                }
                //show pending
                document.getElementById("register_msg").innerHTML = "Creating username...";
                document.getElementById("register_msg").className = "";

                //registration complete
                myLock.onUsernameDone = function(error){
                    //show errors
                    if(error !== undefined){
                        document.getElementById("register_msg").innerHTML = error;
                        document.getElementById("register_msg").className = "error";
                    }
                    //redirect to main page
                    else{
                        SHOW_ONBOARDING = true;
                        showPage("main");
                    }
                }
                myLock.setUsername(
                    undefined,
                    document.getElementById("new_secret").value);
            }

            function clickLogin(e){
                e.preventDefault();
                //already pending
                if(document.getElementById("login_msg").innerHTML === "Logging in..."){
                    return;
                }
                //show pending
                document.getElementById("login_msg").innerHTML = "Logging in...";
                document.getElementById("login_msg").className = "";

                //login complete
                myLock.onUsernameDone = function(error){
                    //show errors
                    if(error !== undefined){
                        document.getElementById("login_msg").innerHTML = error;
                        document.getElementById("login_msg").className = "error";
                    }
                    //redirect to main page
                    else{
                        SHOW_ONBOARDING = false;
                        showPage("main");
                    }
                }
                myLock.setUsername(
                    document.getElementById("existing_username").value,
                    document.getElementById("existing_secret").value);
            }

            function clickLogout(e){
                e.preventDefault();
                location.reload(); //logout is just a page refresh
            }

            function clickTutorial(e){
                e.preventDefault();
                document.getElementById("tutorial_wrapper").style.display = "none";
                SHOW_ONBOARDING = false;
            }

            function blurUsername(e){
                document.getElementById("username").value = myLock.getUsername();
            }

            function clickSendBack(e){
                e.preventDefault();
                showPage("main");
            }

            function clickReceiveBack(e){
                e.preventDefault();
                showPage("main");
            }

            function chooseEncrypt(e){
                e.preventDefault();
                showPage("send");
            }

            function chooseDecrypt(e){
                e.preventDefault();
                showPage("receive");
            }

            function clickAddRecip(e){
                e.preventDefault();
                var recip_row = document.createElement('input');
                recip_row.className = "recip_row";
                recip_row.placeholder = "Recipient username";
                document.getElementById("recip_list").insertBefore(
                    recip_row,
                    document.getElementById("add_recip"));
            }

            function changeEncryptionFile(e){
                var file = document.getElementById("raw_data").files[0];
                //already pending
                if(document.getElementById("encryption_status").innerHTML === "Encrypting..."){
                    return;
                }
                //show pending
                document.getElementById("encryption_wrapper").style.display = "inline-block";
                document.getElementById("encryption_data").style.display = "none";
                document.getElementById("encryption_status").innerHTML = "Encrypting...";
                document.getElementById("encryption_status").className = "";

                //parse recipients
                var recips = document.querySelectorAll("input.recip_row");
                var usernames = [myLock.getUsername()];
                for(var i = 0; i < recips.length; i++){
                    if(recips[i].value && usernames.indexOf(recips[i].value) === -1){
                        usernames.push(recips[i].value);
                    }
                }

                //encryption progress handling
                myLock.onEncryptProgress = function(progress){
                    document.getElementById("encryption_progress").style.width = progress + "%";
                    document.getElementById("encryption_percent").innerHTML = progress + "%";
                };
                //encryption complete handling
                myLock.onEncryptDone = function(file, error){
                    if(error !== undefined){
                        document.getElementById("encryption_status").innerHTML = error;
                        document.getElementById("encryption_status").className = "error";
                    }
                    else{
                        var data_url = window.URL.createObjectURL(file);
                        var random_filename = Base58.encode(nacl.randomBytes(8)) + ".locked";
                        document.getElementById("encryption_data").href = data_url;
                        document.getElementById("encryption_data").download = random_filename;
                        document.getElementById("encryption_data").style.display = "inline-block";
                        document.getElementById("encryption_status").innerHTML = "";
                        document.getElementById("encryption_status").className = "";
                    }
                };
                myLock.encrypt(file.name, file, usernames);
            }

            function changeDecryptionFile(e){
                var file = document.getElementById("encrypted_data").files[0];
                //already pending
                if(document.getElementById("decryption_status").innerHTML === "Decrypting..."){
                    return;
                }
                //show pending
                document.getElementById("decryption_wrapper").style.display = "inline-block";
                document.getElementById("decryption_data").style.display = "none";
                document.getElementById("decryption_status").innerHTML = "Decrypting...";
                document.getElementById("decryption_status").className = "";

                //decryption progress handling
                myLock.onDecryptProgress = function(progress){
                    document.getElementById("decryption_progress").style.width = progress + "%";
                    document.getElementById("decryption_percent").innerHTML = progress + "%";
                };
                //decryption complete handling
                myLock.onDecryptDone = function(sender, filename, file, error){
                    if(error !== undefined){
                        document.getElementById("decryption_status").innerHTML = error;
                        document.getElementById("decryption_status").className = "error";
                    }
                    else{
                        var data_url = window.URL.createObjectURL(file);
                        document.getElementById("decryption_data").href = data_url;
                        document.getElementById("decryption_data").download = filename;
                        document.getElementById("decryption_data").style.display = "inline-block";
                        document.getElementById("decryption_status").innerHTML = "Signed by: " + sender;
                        document.getElementById("decryption_status").className = "";
                    }
                };
                myLock.decrypt(file);
            }

            //bind events
            document.getElementById("register_button").addEventListener("click", clickRegister);
            document.getElementById("login_button").addEventListener("click", clickLogin);
            document.getElementById("logout").addEventListener("click", clickLogout);
            document.getElementById("username").addEventListener("blur", blurUsername);
            document.getElementById("send_back").addEventListener("click", clickSendBack);
            document.getElementById("receive_back").addEventListener("click", clickReceiveBack);
            document.getElementById("close_tutorial").addEventListener("click", clickTutorial);
            document.getElementById("choose_send").addEventListener("click", chooseEncrypt);
            document.getElementById("choose_receive").addEventListener("click", chooseDecrypt);
            document.getElementById("add_recip").addEventListener("click", clickAddRecip);
            function bindChangeEncryptionFile(e){
                document.getElementById("raw_data").removeEventListener("change", changeEncryptionFile);
                document.getElementById("raw_data").addEventListener("change", changeEncryptionFile);
            }
            function bindChangeDecryptionFile(e){
                document.getElementById("encrypted_data").removeEventListener("change", changeDecryptionFile);
                document.getElementById("encrypted_data").addEventListener("change", changeDecryptionFile);
            }
            bindChangeEncryptionFile();
            bindChangeDecryptionFile();

        </script>
    </body>
</html>