Initial tests

author: Dirk Engling <erdgeist@erdgeist.org> 2016-10-09 01:54:34 +0200
committer: Dirk Engling <erdgeist@erdgeist.org> 2016-10-09 01:54:34 +0200
commit: c932cd295d414f78c65167e7717b04f61e93122a (patch)
tree: aad57f7461ad72ba4ebf4e411f112e1eacb26ad0
4 files changed, 369 insertions, 0 deletions
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a2eb441
--- /dev/null
+++ b/README.md
@@ -0,0 +1,27 @@
+# Simple AES-256-CCM-PSK drop in front end script for the sjcl library
+This script is intended to be just included in any HTML document via a simple <script src="sjcl-front.js"></script>
+and provide ad-hoc group crypto for that site.
+The script walks through all text nodes and checks for the sjcl-front signature sjcl://
+and tries to retrieve a key from localStorage or sessionStorage whose name matches the
+one encoded as associated data in the encoded sjcl dictionary. If it can decrypt the
+string, the text node's content is replaced by the plaintext and a class sjcl-decrypted
+is added to its parent node.
+If the respective key can not be found, the class sjcl-undecrypted is added to the
+parent node, which also receives a copy of the ciphertext, before the text node is
+replaced by an informative message. A click handler for sjcl-undecrypted objects allows
+to later re-decrypt the text by providing a key.
+During initialisation, the script also walks through all TEXTAREA nodes and injects a
+hook revealing a contextual drop down menu that allows encrypting the TEXTAREA's content,
+decrypting it and adding/deleting keys in localStorage. Future versions may allow adding
+that hook to text input fields or filtering by class or id.
+Finally the script injects CSS to the document's head to get the injected nodes working.
+You can try the script at [https://erdgeist.org/webcrypto/].
+The library that does the heavy lifting can be found here: https://github.com/bitwiseshiftleft/sjcl
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..edf8f38
--- /dev/null
+++ b/index.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>title</title>
+    <script src="sjcl.js"></script>
+    <script src="sjcl-front.js"></script>
+  </script>
+  </head>
+  <body>
+    <textarea rows="4" id="dest"></textarea>
+    <div><b>Hint: </b> passphrase for the key named Schlüssel =&gt; Insgeheim, Schlüssel2 =&gt; Nochgeheimer</div>
+    <div>sjcl://{"iv":"7EZ8MFvT0UQe7PPF8R1X8w==","v":1,"iter":1000,"ks":256,"ts":128,"mode":"ccm","adata":"U2NobMO8c3NlbA==","cipher":"aes","salt":"O7XZXQtj0U8=","ct":"NBKhmDDDJtiimILFoJm2CDY3lqnb"}</div>
+    <div>sjcl://{"iv":"MshCIxkW8VnzCw9DNKXrzw==","v":1,"iter":1000,"ks":256,"ts":128,"mode":"ccm","adata":"U2NobMO8c3NlbDI=","cipher":"aes","salt":"PfGQ9go1EUM=","ct":"nGA0OFDq5xSfLTHTE8QLqw+IjbIr2g=="}</div>
+    <div>sjcl://{"iv":"rj3F/Y3D6+h7aPUjYTdFfQ==","v":1,"iter":1000,"ks":256,"ts":128,"mode":"ccm","adata":"U2NobMO8c3NlbA==","cipher":"aes","salt":"O7XZXQtj0U8=","ct":"509+BfGlvASJqYGCVdae1kqdXm76+e4kxKfeOw=="}</div>
+  </body>
+</html>
diff --git a/sjcl-front.js b/sjcl-front.js
new file mode 100644
index 0000000..1a67d64
--- /dev/null
+++ b/sjcl-front.js
@@ -0,0 +1,264 @@
+function inject_css() {
+  var s = document.createElement('style');
+  s.setAttribute('type', 'text/css');
+  s.appendChild(document.createTextNode("\
+@font-face { \n\
+font-family: 'fontello'; src: url('data:application/octet-stream;base64,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') format('woff'); } \n\
+.sjcl-undecrypted { background-color: rgba(255, 0, 0, 0.2); cursor: pointer; } \n\
+.sjcl-decrypted { background-color: rgba(0, 255, 0, 0.2); } \n\
+.sjcl-hook { display: inline-block; position: relative; vertical-align: top; } \n\
+.sjcl-hook:before, .sjcl-decrypted:before, .sjcl-undecrypted:before { content: '\\e801 '; font-family: 'fontello'; opacity: 0.5; font-size: 1.1em; padding: 0 0.3em 0 0.3em; margin-right: 0.2em; box-shadow: 0 0 0.3em currentColor; border-radius: 50%; } \n\
+.sjcl-dropdown, .sjcl-addkey-sub { display: none; border-radius: 0.4em; } \n\
+.sjcl-hook:hover .sjcl-dropdown { display: block; position: absolute; min-width: 300px; background-color: #f9f9f9; box-shadow: 0px 1em 2em 0 rgba(0,0,0,0.2); color: black; } \n\
+.sjcl-decrypt, .sjcl-usekey, .sjcl-addkey { padding: 2px 3px 2px 6px; cursor: pointer; border-radius: 0 0 0.4em 0.4em; } \n\
+.sjcl-decrypt:hover, .sjcl-usekey:hover, .sjcl-addkey:hover { border-radius: 0.4em; background-color: #f1f1f1; } \n\
+.sjcl-addkey:hover .sjcl-addkey-sub { display: block; } \n\
+.sjcl-addkey-sub label { display: inline-block !important; width: 40%; } \n\
+.sjcl-addkey-button, .sjcl-delkey-button { display: inline-block; text-align: center; margin-right: 6px; width: 40%; border-radius: 0.4em; border: solid 0.1em lime; } \n\
+.sjcl-delkey-button { border: solid 0.1em red; } \n\
+.sjcl-addkey-button:hover { background-color: lime; } \n\
+.sjcl-delkey-button:hover { background-color: red; } \
+"));
+  document.getElementsByTagName('head')[0].appendChild(s);
+}
+function inject_textarea_hook() {
+  // Get rid of old hooks
+  var hooks = document.getElementsByClassName("sjcl-hook");
+  for(var i = hooks.length - 1; i >= 0; i--) {
+    var n = hooks.item(i);
+    n.parentNode.removeChild(n);
+  }
+  // And insert new hooks
+  var walk=document.createTreeWalker(document.body,NodeFilter.SHOW_ELEMENT,null,false);
+  while(n = walk.nextNode())
+    if (n.type == 'textarea') {
+      var keys = list_keys();
+      var h = document.createElement('div');
+      h.className='sjcl-hook';
+      var dd = '<div class="sjcl-dropdown">'
+      for (var i in keys)
+        dd += '<div class="sjcl-usekey" keyname="'+keys[i]+'">Encrypt with: "'+keys[i]+'"</div>';
+      h.innerHTML = dd + '<div class="sjcl-decrypt">Decrypt</div><hr/><div class="sjcl-addkey">Manage keys<div class="sjcl-addkey-sub"><label>Name:</label><input class="sjcl-addkey-name" type="text"/><label>Key:</label><input class="sjcl-addkey-key" type="password"/><div class="sjcl-addkey-button">add!</div><div class="sjcl-delkey-button">delete!</div></div></div></div>';
+      n.parentNode.insertBefore(h,n.nextSibling);
+    }
+}
+function decrypt_string(text, target_node, do_prompt) {
+  var rp, ct, plain, key_name, key, do_store = false;
+  /* Clear sjcl classes from target node */
+  target_node.className = target_node.className.replace(/(^| )sjcl-[a-z]+($| )/, '');
+  /* Check sjcl signature and bail out */
+  if (text.substring(0,7) != 'sjcl://') 
+    throw 'Text is not encrypted.';
+  /* Skip signature */
+  text = text.substring(7);
+  /* Retrieve key name */
+  try {
+    ct = JSON.parse(text);
+  } catch (e) {
+    target_node.className += ' sjcl-garbled';
+    throw 'Cipher text is garbled.';
+  }
+  try {
+    key_name = sjcl.codec.utf8String.fromBits(sjcl.codec.base64.toBits(ct.adata));
+  } catch(e) {
+    target_node.className += ' sjcl-garbled';
+    throw 'Can not extract key name';
+  }
+  key = retrieve_key(key_name);
+  if (!key && do_prompt) {
+    key = prompt( 'Enter password for the key ' + key_name);
+    do_store = true;
+  }
+  if (!key) {
+    target_node.className +=  ' sjcl-undecrypted';
+    throw 'You need the key "' + key_name + '" to decrypt.';
+  }
+  try {
+    plain = sjcl.decrypt(key, text, {}, rp);
+  } catch (e) {
+    if (do_store)
+      alert('Could not decrypt');
+    target_node.className += ' sjcl-undecrytable';
+    throw 'Your key "' + key_name + '" can not decrypt.';
+  }
+  if (do_store)
+    store_key(key_name, key);
+  target_node.className += ' sjcl-decrypted';
+  return plain.replace(/\s+$/gm,'');
+}
+function decrypt_element(n) {
+  try {
+    n.data = decrypt_string(n.data, n.parentElement, false);
+  } catch(e) {
+    n.parentElement.ciphertext = n.data;
+    n.parentElement.ciphertext_node = n;
+    n.data = e;
+  }
+}
+function decrypt_undecrypted(n) {
+  if(!n.ciphertext || n.ciphertext_node==null)
+    return;
+  try {
+    n.ciphertext_node.data = decrypt_string(n.ciphertext, n, true);
+    inject_textarea_hook();
+    find_undecrypted_nodes();
+  } catch(e) {
+    n.ciphertext_node.data = e;
+  }
+}
+function decrypt_textarea(n) {
+  try {
+    n.value = decrypt_string(n.value, n, false);
+  } catch(e) {
+    alert(e);
+  }
+}
+function encrypt_textarea(n,name,key) {
+  var t = n.value + (" ".repeat(17 + Math.floor((Math.random() * 64))));
+  var p = {adata:name, iter:1000, mode:'ccm', ts:128, ks:256, iter: 1000 };
+  n.value = 'sjcl://'+sjcl.encrypt(key, t || '', p);
+  n.className = n.className.replace(/(^| )sjcl-[a-z]+($| )/, '')+' sjcl-undecrypted';
+}
+/* Auto node operation */
+function find_encrypted_nodes() {
+  var n, walk = document.createTreeWalker(document.body,NodeFilter.SHOW_TEXT,null,false);
+  while(n = walk.nextNode())
+    if (n.data.substring(0,7) == 'sjcl://')
+      decrypt_element(n, false);
+}
+function find_undecrypted_nodes() {
+  var undec = document.getElementsByClassName("sjcl-undecrypted");
+  for(var i = 0; i < undec.length; i++)
+    decrypt_undecrypted(undec.item(i), false);
+}
+/* Passphrase accessors */
+function manage_key(n, do_add) {
+  var name = n.parentNode.getElementsByClassName('sjcl-addkey-name')[0];
+  var key = n.parentNode.getElementsByClassName('sjcl-addkey-key')[0];
+  if (!name.value)
+    alert( 'Missing key name.');
+  else
+    store_key(name.value, do_add ? key.value : '');
+  inject_textarea_hook();
+}
+/* Try to use the most logliving method to store key array */
+function store_key(name, key) {
+  /* Collect keys from all storage methods */
+  var obj = {};
+  try {
+    obj = JSON.parse(localStorage['frab-sjcl']);
+  } catch(e) {}
+  try {
+    var sso = JSON.parse(sessionStorage['frab-sjcl']);
+    for (var k in sso) { obj[k] = sso[k]; }
+    delete sessionStorage['frab-sjcl'];
+  } catch(e) {}
+  try {
+    wo = JSON.parse(window['frab-sjcl']);
+    for (var k in wo) { obj[k] = wo[k]; }
+    delete window['frab-sjcl'];
+  } catch(e) {}
+  if (key)
+    obj[name] = key;
+  else
+    delete obj[name];
+  var out = JSON.stringify(obj);
+  /* Try to store in local/sessionStorage and fall back to
+     the window object, so at least we can decrypt all elements
+     locally */
+  try {
+    localStorage['frab-sjcl'] = out;
+    if (localStorage['frab-sjcl'] != out)
+      throw 0;
+    return;
+  } catch(e) {}
+  try {
+    sessionStorage['frab-sjcl'] = out;
+    if (sessionStorage['frab-sjcl'] != out)
+      throw 0;
+    return;
+  } catch(e) {}
+  window['frab-sjcl'] = out;
+}
+function retrieve_key(name) {
+  try {
+    var obj = JSON.parse(localStorage['frab-sjcl'] || '{}');
+    if (obj && obj[name])
+      return obj[name];
+  } catch(e) {}
+  try {
+    var obj = JSON.parse(sessionStorage['frab-sjcl'] || '{}');
+    if (obj && obj[name])
+      return obj[name];
+  } catch(e) {}
+  try {
+    var obj = JSON.parse(window['frab-sjcl'] || '{}');
+    if (obj && obj[name])
+      return obj[name];
+  } catch(e) {}
+  return '';
+}
+function list_keys() {
+  var key_list = [];
+  try {
+    key_list = (Object.keys(JSON.parse(localStorage['frab-sjcl'])));
+  } catch(e) {}
+  try {
+    key_list = key_list.concat(Object.keys(JSON.parse(sessionStorage['frab-sjcl'])));
+  } catch(e) {}
+  try {
+    key_list = key_list.concat(Object.keys(JSON.parse(window['frab-sjcl'])));
+  } catch(e) {}
+  return key_list;
+}
+/* Event handler plumbing */
+function click_body(e) {
+  var n = e.target;
+  if (n.className=='sjcl-usekey') {
+    var name = n.getAttribute('keyname');
+    encrypt_textarea(n.parentNode.parentNode.previousSibling, name, retrieve_key(name));
+  }
+  if (n.className=='sjcl-decrypt')
+    decrypt_textarea(n.parentNode.parentNode.previousSibling);
+  if ((' '+n.className+' ').indexOf(' sjcl-undecrypted ') > -1)
+    decrypt_undecrypted(n);
+  if (n.className=='sjcl-addkey-button')
+    manage_key(n,true);
+  if (n.className=='sjcl-delkey-button')
+    manage_key(n,false);
+}
+function loaded() {
+  sjcl.random.startCollectors();
+  document.body.addEventListener("click", click_body)
+  inject_css();
+  inject_textarea_hook();
+  /* Try to decrypt all encrypted nodes */
+  find_encrypted_nodes();
+}
+window.addEventListener('load', loaded);
diff --git a/sjcl.js b/sjcl.js
new file mode 100644
index 0000000..6f7668e
--- /dev/null
+++ b/sjcl.js
@@ -0,0 +1,59 @@
+"use strict";var sjcl={cipher:{},hash:{},keyexchange:{},mode:{},misc:{},codec:{},exception:{corrupt:function(a){this.toString=function(){return"CORRUPT: "+this.message};this.message=a},invalid:function(a){this.toString=function(){return"INVALID: "+this.message};this.message=a},bug:function(a){this.toString=function(){return"BUG: "+this.message};this.message=a},notReady:function(a){this.toString=function(){return"NOT READY: "+this.message};this.message=a}}};
+"undefined"!==typeof module&&module.exports&&(module.exports=sjcl);"function"===typeof define&&define([],function(){return sjcl});
+sjcl.cipher.aes=function(a){this.s[0][0][0]||this.O();var b,c,d,e,g=this.s[0][4],f=this.s[1];b=a.length;var h=1;if(4!==b&&6!==b&&8!==b)throw new sjcl.exception.invalid("invalid aes key size");this.b=[d=a.slice(0),e=[]];for(a=b;a<4*b+28;a++){c=d[a-1];if(0===a%b||8===b&&4===a%b)c=g[c>>>24]<<24^g[c>>16&255]<<16^g[c>>8&255]<<8^g[c&255],0===a%b&&(c=c<<8^c>>>24^h<<24,h=h<<1^283*(h>>7));d[a]=d[a-b]^c}for(b=0;a;b++,a--)c=d[b&3?a:a-4],e[b]=4>=a||4>b?c:f[0][g[c>>>24]]^f[1][g[c>>16&255]]^f[2][g[c>>8&255]]^f[3][g[c&
+255]]};
+sjcl.cipher.aes.prototype={encrypt:function(a){return u(this,a,0)},decrypt:function(a){return u(this,a,1)},s:[[[],[],[],[],[]],[[],[],[],[],[]]],O:function(){var a=this.s[0],b=this.s[1],c=a[4],d=b[4],e,g,f,h=[],l=[],k,m,n,p;for(e=0;0x100>e;e++)l[(h[e]=e<<1^283*(e>>7))^e]=e;for(g=f=0;!c[g];g^=k||1,f=l[f]||1)for(n=f^f<<1^f<<2^f<<3^f<<4,n=n>>8^n&255^99,c[g]=n,d[n]=g,m=h[e=h[k=h[g]]],p=0x1010101*m^0x10001*e^0x101*k^0x1010100*g,m=0x101*h[n]^0x1010100*n,e=0;4>e;e++)a[e][g]=m=m<<24^m>>>8,b[e][n]=p=p<<24^p>>>8;for(e=
+0;5>e;e++)a[e]=a[e].slice(0),b[e]=b[e].slice(0)}};
+function u(a,b,c){if(4!==b.length)throw new sjcl.exception.invalid("invalid aes block size");var d=a.b[c],e=b[0]^d[0],g=b[c?3:1]^d[1],f=b[2]^d[2];b=b[c?1:3]^d[3];var h,l,k,m=d.length/4-2,n,p=4,r=[0,0,0,0];h=a.s[c];a=h[0];var q=h[1],t=h[2],w=h[3],x=h[4];for(n=0;n<m;n++)h=a[e>>>24]^q[g>>16&255]^t[f>>8&255]^w[b&255]^d[p],l=a[g>>>24]^q[f>>16&255]^t[b>>8&255]^w[e&255]^d[p+1],k=a[f>>>24]^q[b>>16&255]^t[e>>8&255]^w[g&255]^d[p+2],b=a[b>>>24]^q[e>>16&255]^t[g>>8&255]^w[f&255]^d[p+3],p+=4,e=h,g=l,f=k;for(n=
+0;4>n;n++)r[c?3&-n:n]=x[e>>>24]<<24^x[g>>16&255]<<16^x[f>>8&255]<<8^x[b&255]^d[p++],h=e,e=g,g=f,f=b,b=h;return r}
+sjcl.bitArray={bitSlice:function(a,b,c){a=sjcl.bitArray.$(a.slice(b/32),32-(b&31)).slice(1);return void 0===c?a:sjcl.bitArray.clamp(a,c-b)},extract:function(a,b,c){var d=Math.floor(-b-c&31);return((b+c-1^b)&-32?a[b/32|0]<<32-d^a[b/32+1|0]>>>d:a[b/32|0]>>>d)&(1<<c)-1},concat:function(a,b){if(0===a.length||0===b.length)return a.concat(b);var c=a[a.length-1],d=sjcl.bitArray.getPartial(c);return 32===d?a.concat(b):sjcl.bitArray.$(b,d,c|0,a.slice(0,a.length-1))},bitLength:function(a){var b=a.length;return 0===
+b?0:32*(b-1)+sjcl.bitArray.getPartial(a[b-1])},clamp:function(a,b){if(32*a.length<b)return a;a=a.slice(0,Math.ceil(b/32));var c=a.length;b=b&31;0<c&&b&&(a[c-1]=sjcl.bitArray.partial(b,a[c-1]&2147483648>>b-1,1));return a},partial:function(a,b,c){return 32===a?b:(c?b|0:b<<32-a)+0x10000000000*a},getPartial:function(a){return Math.round(a/0x10000000000)||32},equal:function(a,b){if(sjcl.bitArray.bitLength(a)!==sjcl.bitArray.bitLength(b))return!1;var c=0,d;for(d=0;d<a.length;d++)c|=a[d]^b[d];return 0===
+c},$:function(a,b,c,d){var e;e=0;for(void 0===d&&(d=[]);32<=b;b-=32)d.push(c),c=0;if(0===b)return d.concat(a);for(e=0;e<a.length;e++)d.push(c|a[e]>>>b),c=a[e]<<32-b;e=a.length?a[a.length-1]:0;a=sjcl.bitArray.getPartial(e);d.push(sjcl.bitArray.partial(b+a&31,32<b+a?c:d.pop(),1));return d},i:function(a,b){return[a[0]^b[0],a[1]^b[1],a[2]^b[2],a[3]^b[3]]},byteswapM:function(a){var b,c;for(b=0;b<a.length;++b)c=a[b],a[b]=c>>>24|c>>>8&0xff00|(c&0xff00)<<8|c<<24;return a}};
+sjcl.codec.utf8String={fromBits:function(a){var b="",c=sjcl.bitArray.bitLength(a),d,e;for(d=0;d<c/8;d++)0===(d&3)&&(e=a[d/4]),b+=String.fromCharCode(e>>>24),e<<=8;return decodeURIComponent(escape(b))},toBits:function(a){a=unescape(encodeURIComponent(a));var b=[],c,d=0;for(c=0;c<a.length;c++)d=d<<8|a.charCodeAt(c),3===(c&3)&&(b.push(d),d=0);c&3&&b.push(sjcl.bitArray.partial(8*(c&3),d));return b}};
+sjcl.codec.hex={fromBits:function(a){var b="",c;for(c=0;c<a.length;c++)b+=((a[c]|0)+0xf00000000000).toString(16).substr(4);return b.substr(0,sjcl.bitArray.bitLength(a)/4)},toBits:function(a){var b,c=[],d;a=a.replace(/\s|0x/g,"");d=a.length;a=a+"00000000";for(b=0;b<a.length;b+=8)c.push(parseInt(a.substr(b,8),16)^0);return sjcl.bitArray.clamp(c,4*d)}};
+sjcl.codec.base32={B:"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567",X:"0123456789ABCDEFGHIJKLMNOPQRSTUV",BITS:32,BASE:5,REMAINING:27,fromBits:function(a,b,c){var d=sjcl.codec.base32.BASE,e=sjcl.codec.base32.REMAINING,g="",f=0,h=sjcl.codec.base32.B,l=0,k=sjcl.bitArray.bitLength(a);c&&(h=sjcl.codec.base32.X);for(c=0;g.length*d<k;)g+=h.charAt((l^a[c]>>>f)>>>e),f<d?(l=a[c]<<d-f,f+=e,c++):(l<<=d,f-=d);for(;g.length&7&&!b;)g+="=";return g},toBits:function(a,b){a=a.replace(/\s|=/g,"").toUpperCase();var c=sjcl.codec.base32.BITS,
+d=sjcl.codec.base32.BASE,e=sjcl.codec.base32.REMAINING,g=[],f,h=0,l=sjcl.codec.base32.B,k=0,m,n="base32";b&&(l=sjcl.codec.base32.X,n="base32hex");for(f=0;f<a.length;f++){m=l.indexOf(a.charAt(f));if(0>m){if(!b)try{return sjcl.codec.base32hex.toBits(a)}catch(p){}throw new sjcl.exception.invalid("this isn't "+n+"!");}h>e?(h-=e,g.push(k^m>>>h),k=m<<c-h):(h+=d,k^=m<<c-h)}h&56&&g.push(sjcl.bitArray.partial(h&56,k,1));return g}};
+sjcl.codec.base32hex={fromBits:function(a,b){return sjcl.codec.base32.fromBits(a,b,1)},toBits:function(a){return sjcl.codec.base32.toBits(a,1)}};
+sjcl.codec.base64={B:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",fromBits:function(a,b,c){var d="",e=0,g=sjcl.codec.base64.B,f=0,h=sjcl.bitArray.bitLength(a);c&&(g=g.substr(0,62)+"-_");for(c=0;6*d.length<h;)d+=g.charAt((f^a[c]>>>e)>>>26),6>e?(f=a[c]<<6-e,e+=26,c++):(f<<=6,e-=6);for(;d.length&3&&!b;)d+="=";return d},toBits:function(a,b){a=a.replace(/\s|=/g,"");var c=[],d,e=0,g=sjcl.codec.base64.B,f=0,h;b&&(g=g.substr(0,62)+"-_");for(d=0;d<a.length;d++){h=g.indexOf(a.charAt(d));
+if(0>h)throw new sjcl.exception.invalid("this isn't base64!");26<e?(e-=26,c.push(f^h>>>e),f=h<<32-e):(e+=6,f^=h<<32-e)}e&56&&c.push(sjcl.bitArray.partial(e&56,f,1));return c}};sjcl.codec.base64url={fromBits:function(a){return sjcl.codec.base64.fromBits(a,1,1)},toBits:function(a){return sjcl.codec.base64.toBits(a,1)}};sjcl.hash.sha256=function(a){this.b[0]||this.O();a?(this.F=a.F.slice(0),this.A=a.A.slice(0),this.l=a.l):this.reset()};sjcl.hash.sha256.hash=function(a){return(new sjcl.hash.sha256).update(a).finalize()};
+sjcl.hash.sha256.prototype={blockSize:512,reset:function(){this.F=this.Y.slice(0);this.A=[];this.l=0;return this},update:function(a){"string"===typeof a&&(a=sjcl.codec.utf8String.toBits(a));var b,c=this.A=sjcl.bitArray.concat(this.A,a);b=this.l;a=this.l=b+sjcl.bitArray.bitLength(a);for(b=512+b&-512;b<=a;b+=512)v(this,c.splice(0,16));return this},finalize:function(){var a,b=this.A,c=this.F,b=sjcl.bitArray.concat(b,[sjcl.bitArray.partial(1,1)]);for(a=b.length+2;a&15;a++)b.push(0);b.push(Math.floor(this.l/
+4294967296));for(b.push(this.l|0);b.length;)v(this,b.splice(0,16));this.reset();return c},Y:[],b:[],O:function(){function a(a){return 0x100000000*(a-Math.floor(a))|0}var b=0,c=2,d;a:for(;64>b;c++){for(d=2;d*d<=c;d++)if(0===c%d)continue a;8>b&&(this.Y[b]=a(Math.pow(c,.5)));this.b[b]=a(Math.pow(c,1/3));b++}}};
+function v(a,b){var c,d,e,g=b.slice(0),f=a.F,h=a.b,l=f[0],k=f[1],m=f[2],n=f[3],p=f[4],r=f[5],q=f[6],t=f[7];for(c=0;64>c;c++)16>c?d=g[c]:(d=g[c+1&15],e=g[c+14&15],d=g[c&15]=(d>>>7^d>>>18^d>>>3^d<<25^d<<14)+(e>>>17^e>>>19^e>>>10^e<<15^e<<13)+g[c&15]+g[c+9&15]|0),d=d+t+(p>>>6^p>>>11^p>>>25^p<<26^p<<21^p<<7)+(q^p&(r^q))+h[c],t=q,q=r,r=p,p=n+d|0,n=m,m=k,k=l,l=d+(k&m^n&(k^m))+(k>>>2^k>>>13^k>>>22^k<<30^k<<19^k<<10)|0;f[0]=f[0]+l|0;f[1]=f[1]+k|0;f[2]=f[2]+m|0;f[3]=f[3]+n|0;f[4]=f[4]+p|0;f[5]=f[5]+r|0;f[6]=
+f[6]+q|0;f[7]=f[7]+t|0}
+sjcl.mode.ccm={name:"ccm",G:[],listenProgress:function(a){sjcl.mode.ccm.G.push(a)},unListenProgress:function(a){a=sjcl.mode.ccm.G.indexOf(a);-1<a&&sjcl.mode.ccm.G.splice(a,1)},fa:function(a){var b=sjcl.mode.ccm.G.slice(),c;for(c=0;c<b.length;c+=1)b[c](a)},encrypt:function(a,b,c,d,e){var g,f=b.slice(0),h=sjcl.bitArray,l=h.bitLength(c)/8,k=h.bitLength(f)/8;e=e||64;d=d||[];if(7>l)throw new sjcl.exception.invalid("ccm: iv must be at least 7 bytes");for(g=2;4>g&&k>>>8*g;g++);g<15-l&&(g=15-l);c=h.clamp(c,
+8*(15-g));b=sjcl.mode.ccm.V(a,b,c,d,e,g);f=sjcl.mode.ccm.C(a,f,c,b,e,g);return h.concat(f.data,f.tag)},decrypt:function(a,b,c,d,e){e=e||64;d=d||[];var g=sjcl.bitArray,f=g.bitLength(c)/8,h=g.bitLength(b),l=g.clamp(b,h-e),k=g.bitSlice(b,h-e),h=(h-e)/8;if(7>f)throw new sjcl.exception.invalid("ccm: iv must be at least 7 bytes");for(b=2;4>b&&h>>>8*b;b++);b<15-f&&(b=15-f);c=g.clamp(c,8*(15-b));l=sjcl.mode.ccm.C(a,l,c,k,e,b);a=sjcl.mode.ccm.V(a,l.data,c,d,e,b);if(!g.equal(l.tag,a))throw new sjcl.exception.corrupt("ccm: tag doesn't match");
+return l.data},na:function(a,b,c,d,e,g){var f=[],h=sjcl.bitArray,l=h.i;d=[h.partial(8,(b.length?64:0)|d-2<<2|g-1)];d=h.concat(d,c);d[3]|=e;d=a.encrypt(d);if(b.length)for(c=h.bitLength(b)/8,65279>=c?f=[h.partial(16,c)]:0xffffffff>=c&&(f=h.concat([h.partial(16,65534)],[c])),f=h.concat(f,b),b=0;b<f.length;b+=4)d=a.encrypt(l(d,f.slice(b,b+4).concat([0,0,0])));return d},V:function(a,b,c,d,e,g){var f=sjcl.bitArray,h=f.i;e/=8;if(e%2||4>e||16<e)throw new sjcl.exception.invalid("ccm: invalid tag length");
+if(0xffffffff<d.length||0xffffffff<b.length)throw new sjcl.exception.bug("ccm: can't deal with 4GiB or more data");c=sjcl.mode.ccm.na(a,d,c,e,f.bitLength(b)/8,g);for(d=0;d<b.length;d+=4)c=a.encrypt(h(c,b.slice(d,d+4).concat([0,0,0])));return f.clamp(c,8*e)},C:function(a,b,c,d,e,g){var f,h=sjcl.bitArray;f=h.i;var l=b.length,k=h.bitLength(b),m=l/50,n=m;c=h.concat([h.partial(8,g-1)],c).concat([0,0,0]).slice(0,4);d=h.bitSlice(f(d,a.encrypt(c)),0,e);if(!l)return{tag:d,data:[]};for(f=0;f<l;f+=4)f>m&&(sjcl.mode.ccm.fa(f/
+l),m+=n),c[3]++,e=a.encrypt(c),b[f]^=e[0],b[f+1]^=e[1],b[f+2]^=e[2],b[f+3]^=e[3];return{tag:d,data:h.clamp(b,k)}}};
+sjcl.mode.ocb2={name:"ocb2",encrypt:function(a,b,c,d,e,g){if(128!==sjcl.bitArray.bitLength(c))throw new sjcl.exception.invalid("ocb iv must be 128 bits");var f,h=sjcl.mode.ocb2.S,l=sjcl.bitArray,k=l.i,m=[0,0,0,0];c=h(a.encrypt(c));var n,p=[];d=d||[];e=e||64;for(f=0;f+4<b.length;f+=4)n=b.slice(f,f+4),m=k(m,n),p=p.concat(k(c,a.encrypt(k(c,n)))),c=h(c);n=b.slice(f);b=l.bitLength(n);f=a.encrypt(k(c,[0,0,0,b]));n=l.clamp(k(n.concat([0,0,0]),f),b);m=k(m,k(n.concat([0,0,0]),f));m=a.encrypt(k(m,k(c,h(c))));
+d.length&&(m=k(m,g?d:sjcl.mode.ocb2.pmac(a,d)));return p.concat(l.concat(n,l.clamp(m,e)))},decrypt:function(a,b,c,d,e,g){if(128!==sjcl.bitArray.bitLength(c))throw new sjcl.exception.invalid("ocb iv must be 128 bits");e=e||64;var f=sjcl.mode.ocb2.S,h=sjcl.bitArray,l=h.i,k=[0,0,0,0],m=f(a.encrypt(c)),n,p,r=sjcl.bitArray.bitLength(b)-e,q=[];d=d||[];for(c=0;c+4<r/32;c+=4)n=l(m,a.decrypt(l(m,b.slice(c,c+4)))),k=l(k,n),q=q.concat(n),m=f(m);p=r-32*c;n=a.encrypt(l(m,[0,0,0,p]));n=l(n,h.clamp(b.slice(c),p).concat([0,
+0,0]));k=l(k,n);k=a.encrypt(l(k,l(m,f(m))));d.length&&(k=l(k,g?d:sjcl.mode.ocb2.pmac(a,d)));if(!h.equal(h.clamp(k,e),h.bitSlice(b,r)))throw new sjcl.exception.corrupt("ocb: tag doesn't match");return q.concat(h.clamp(n,p))},pmac:function(a,b){var c,d=sjcl.mode.ocb2.S,e=sjcl.bitArray,g=e.i,f=[0,0,0,0],h=a.encrypt([0,0,0,0]),h=g(h,d(d(h)));for(c=0;c+4<b.length;c+=4)h=d(h),f=g(f,a.encrypt(g(h,b.slice(c,c+4))));c=b.slice(c);128>e.bitLength(c)&&(h=g(h,d(h)),c=e.concat(c,[-2147483648,0,0,0]));f=g(f,c);
+return a.encrypt(g(d(g(h,d(h))),f))},S:function(a){return[a[0]<<1^a[1]>>>31,a[1]<<1^a[2]>>>31,a[2]<<1^a[3]>>>31,a[3]<<1^135*(a[0]>>>31)]}};
+sjcl.mode.gcm={name:"gcm",encrypt:function(a,b,c,d,e){var g=b.slice(0);b=sjcl.bitArray;d=d||[];a=sjcl.mode.gcm.C(!0,a,g,d,c,e||128);return b.concat(a.data,a.tag)},decrypt:function(a,b,c,d,e){var g=b.slice(0),f=sjcl.bitArray,h=f.bitLength(g);e=e||128;d=d||[];e<=h?(b=f.bitSlice(g,h-e),g=f.bitSlice(g,0,h-e)):(b=g,g=[]);a=sjcl.mode.gcm.C(!1,a,g,d,c,e);if(!f.equal(a.tag,b))throw new sjcl.exception.corrupt("gcm: tag doesn't match");return a.data},ka:function(a,b){var c,d,e,g,f,h=sjcl.bitArray.i;e=[0,0,
+0,0];g=b.slice(0);for(c=0;128>c;c++){(d=0!==(a[Math.floor(c/32)]&1<<31-c%32))&&(e=h(e,g));f=0!==(g[3]&1);for(d=3;0<d;d--)g[d]=g[d]>>>1|(g[d-1]&1)<<31;g[0]>>>=1;f&&(g[0]^=-0x1f000000)}return e},j:function(a,b,c){var d,e=c.length;b=b.slice(0);for(d=0;d<e;d+=4)b[0]^=0xffffffff&c[d],b[1]^=0xffffffff&c[d+1],b[2]^=0xffffffff&c[d+2],b[3]^=0xffffffff&c[d+3],b=sjcl.mode.gcm.ka(b,a);return b},C:function(a,b,c,d,e,g){var f,h,l,k,m,n,p,r,q=sjcl.bitArray;n=c.length;p=q.bitLength(c);r=q.bitLength(d);h=q.bitLength(e);
+f=b.encrypt([0,0,0,0]);96===h?(e=e.slice(0),e=q.concat(e,[1])):(e=sjcl.mode.gcm.j(f,[0,0,0,0],e),e=sjcl.mode.gcm.j(f,e,[0,0,Math.floor(h/0x100000000),h&0xffffffff]));h=sjcl.mode.gcm.j(f,[0,0,0,0],d);m=e.slice(0);d=h.slice(0);a||(d=sjcl.mode.gcm.j(f,h,c));for(k=0;k<n;k+=4)m[3]++,l=b.encrypt(m),c[k]^=l[0],c[k+1]^=l[1],c[k+2]^=l[2],c[k+3]^=l[3];c=q.clamp(c,p);a&&(d=sjcl.mode.gcm.j(f,h,c));a=[Math.floor(r/0x100000000),r&0xffffffff,Math.floor(p/0x100000000),p&0xffffffff];d=sjcl.mode.gcm.j(f,d,a);l=b.encrypt(e);
+d[0]^=l[0];d[1]^=l[1];d[2]^=l[2];d[3]^=l[3];return{tag:q.bitSlice(d,0,g),data:c}}};sjcl.misc.hmac=function(a,b){this.W=b=b||sjcl.hash.sha256;var c=[[],[]],d,e=b.prototype.blockSize/32;this.w=[new b,new b];a.length>e&&(a=b.hash(a));for(d=0;d<e;d++)c[0][d]=a[d]^909522486,c[1][d]=a[d]^1549556828;this.w[0].update(c[0]);this.w[1].update(c[1]);this.R=new b(this.w[0])};
+sjcl.misc.hmac.prototype.encrypt=sjcl.misc.hmac.prototype.mac=function(a){if(this.aa)throw new sjcl.exception.invalid("encrypt on already updated hmac called!");this.update(a);return this.digest(a)};sjcl.misc.hmac.prototype.reset=function(){this.R=new this.W(this.w[0]);this.aa=!1};sjcl.misc.hmac.prototype.update=function(a){this.aa=!0;this.R.update(a)};sjcl.misc.hmac.prototype.digest=function(){var a=this.R.finalize(),a=(new this.W(this.w[1])).update(a).finalize();this.reset();return a};
+sjcl.misc.pbkdf2=function(a,b,c,d,e){c=c||1E3;if(0>d||0>c)throw sjcl.exception.invalid("invalid params to pbkdf2");"string"===typeof a&&(a=sjcl.codec.utf8String.toBits(a));"string"===typeof b&&(b=sjcl.codec.utf8String.toBits(b));e=e||sjcl.misc.hmac;a=new e(a);var g,f,h,l,k=[],m=sjcl.bitArray;for(l=1;32*k.length<(d||1);l++){e=g=a.encrypt(m.concat(b,[l]));for(f=1;f<c;f++)for(g=a.encrypt(g),h=0;h<g.length;h++)e[h]^=g[h];k=k.concat(e)}d&&(k=m.clamp(k,d));return k};
+sjcl.prng=function(a){this.c=[new sjcl.hash.sha256];this.m=[0];this.P=0;this.H={};this.N=0;this.U={};this.Z=this.f=this.o=this.ha=0;this.b=[0,0,0,0,0,0,0,0];this.h=[0,0,0,0];this.L=void 0;this.M=a;this.D=!1;this.K={progress:{},seeded:{}};this.u=this.ga=0;this.I=1;this.J=2;this.ca=0x10000;this.T=[0,48,64,96,128,192,0x100,384,512,768,1024];this.da=3E4;this.ba=80};
+sjcl.prng.prototype={randomWords:function(a,b){var c=[],d;d=this.isReady(b);var e;if(d===this.u)throw new sjcl.exception.notReady("generator isn't seeded");if(d&this.J){d=!(d&this.I);e=[];var g=0,f;this.Z=e[0]=(new Date).valueOf()+this.da;for(f=0;16>f;f++)e.push(0x100000000*Math.random()|0);for(f=0;f<this.c.length&&(e=e.concat(this.c[f].finalize()),g+=this.m[f],this.m[f]=0,d||!(this.P&1<<f));f++);this.P>=1<<this.c.length&&(this.c.push(new sjcl.hash.sha256),this.m.push(0));this.f-=g;g>this.o&&(this.o=
+g);this.P++;this.b=sjcl.hash.sha256.hash(this.b.concat(e));this.L=new sjcl.cipher.aes(this.b);for(d=0;4>d&&(this.h[d]=this.h[d]+1|0,!this.h[d]);d++);}for(d=0;d<a;d+=4)0===(d+1)%this.ca&&y(this),e=z(this),c.push(e[0],e[1],e[2],e[3]);y(this);return c.slice(0,a)},setDefaultParanoia:function(a,b){if(0===a&&"Setting paranoia=0 will ruin your security; use it only for testing"!==b)throw"Setting paranoia=0 will ruin your security; use it only for testing";this.M=a},addEntropy:function(a,b,c){c=c||"user";
+var d,e,g=(new Date).valueOf(),f=this.H[c],h=this.isReady(),l=0;d=this.U[c];void 0===d&&(d=this.U[c]=this.ha++);void 0===f&&(f=this.H[c]=0);this.H[c]=(this.H[c]+1)%this.c.length;switch(typeof a){case "number":void 0===b&&(b=1);this.c[f].update([d,this.N++,1,b,g,1,a|0]);break;case "object":c=Object.prototype.toString.call(a);if("[object Uint32Array]"===c){e=[];for(c=0;c<a.length;c++)e.push(a[c]);a=e}else for("[object Array]"!==c&&(l=1),c=0;c<a.length&&!l;c++)"number"!==typeof a[c]&&(l=1);if(!l){if(void 0===
+b)for(c=b=0;c<a.length;c++)for(e=a[c];0<e;)b++,e=e>>>1;this.c[f].update([d,this.N++,2,b,g,a.length].concat(a))}break;case "string":void 0===b&&(b=a.length);this.c[f].update([d,this.N++,3,b,g,a.length]);this.c[f].update(a);break;default:l=1}if(l)throw new sjcl.exception.bug("random: addEntropy only supports number, array of numbers or string");this.m[f]+=b;this.f+=b;h===this.u&&(this.isReady()!==this.u&&A("seeded",Math.max(this.o,this.f)),A("progress",this.getProgress()))},isReady:function(a){a=this.T[void 0!==
+a?a:this.M];return this.o&&this.o>=a?this.m[0]>this.ba&&(new Date).valueOf()>this.Z?this.J|this.I:this.I:this.f>=a?this.J|this.u:this.u},getProgress:function(a){a=this.T[a?a:this.M];return this.o>=a?1:this.f>a?1:this.f/a},startCollectors:function(){if(!this.D){this.a={loadTimeCollector:B(this,this.ma),mouseCollector:B(this,this.oa),keyboardCollector:B(this,this.la),accelerometerCollector:B(this,this.ea),touchCollector:B(this,this.qa)};if(window.addEventListener)window.addEventListener("load",this.a.loadTimeCollector,
+!1),window.addEventListener("mousemove",this.a.mouseCollector,!1),window.addEventListener("keypress",this.a.keyboardCollector,!1),window.addEventListener("devicemotion",this.a.accelerometerCollector,!1),window.addEventListener("touchmove",this.a.touchCollector,!1);else if(document.attachEvent)document.attachEvent("onload",this.a.loadTimeCollector),document.attachEvent("onmousemove",this.a.mouseCollector),document.attachEvent("keypress",this.a.keyboardCollector);else throw new sjcl.exception.bug("can't attach event");
+this.D=!0}},stopCollectors:function(){this.D&&(window.removeEventListener?(window.removeEventListener("load",this.a.loadTimeCollector,!1),window.removeEventListener("mousemove",this.a.mouseCollector,!1),window.removeEventListener("keypress",this.a.keyboardCollector,!1),window.removeEventListener("devicemotion",this.a.accelerometerCollector,!1),window.removeEventListener("touchmove",this.a.touchCollector,!1)):document.detachEvent&&(document.detachEvent("onload",this.a.loadTimeCollector),document.detachEvent("onmousemove",
+this.a.mouseCollector),document.detachEvent("keypress",this.a.keyboardCollector)),this.D=!1)},addEventListener:function(a,b){this.K[a][this.ga++]=b},removeEventListener:function(a,b){var c,d,e=this.K[a],g=[];for(d in e)e.hasOwnProperty(d)&&e[d]===b&&g.push(d);for(c=0;c<g.length;c++)d=g[c],delete e[d]},la:function(){C(1)},oa:function(a){var b,c;try{b=a.x||a.clientX||a.offsetX||0,c=a.y||a.clientY||a.offsetY||0}catch(d){c=b=0}0!=b&&0!=c&&sjcl.random.addEntropy([b,c],2,"mouse");C(0)},qa:function(a){a=
+a.touches[0]||a.changedTouches[0];sjcl.random.addEntropy([a.pageX||a.clientX,a.pageY||a.clientY],1,"touch");C(0)},ma:function(){C(2)},ea:function(a){a=a.accelerationIncludingGravity.x||a.accelerationIncludingGravity.y||a.accelerationIncludingGravity.z;if(window.orientation){var b=window.orientation;"number"===typeof b&&sjcl.random.addEntropy(b,1,"accelerometer")}a&&sjcl.random.addEntropy(a,2,"accelerometer");C(0)}};
+function A(a,b){var c,d=sjcl.random.K[a],e=[];for(c in d)d.hasOwnProperty(c)&&e.push(d[c]);for(c=0;c<e.length;c++)e[c](b)}function C(a){"undefined"!==typeof window&&window.performance&&"function"===typeof window.performance.now?sjcl.random.addEntropy(window.performance.now(),a,"loadtime"):sjcl.random.addEntropy((new Date).valueOf(),a,"loadtime")}function y(a){a.b=z(a).concat(z(a));a.L=new sjcl.cipher.aes(a.b)}
+function z(a){for(var b=0;4>b&&(a.h[b]=a.h[b]+1|0,!a.h[b]);b++);return a.L.encrypt(a.h)}function B(a,b){return function(){b.apply(a,arguments)}}sjcl.random=new sjcl.prng(6);
+a:try{var D,E,F,G;if(G="undefined"!==typeof module&&module.exports){var H;try{H=require("crypto")}catch(a){H=null}G=E=H}if(G&&E.randomBytes)D=E.randomBytes(128),D=new Uint32Array((new Uint8Array(D)).buffer),sjcl.random.addEntropy(D,1024,"crypto['randomBytes']");else if("undefined"!==typeof window&&"undefined"!==typeof Uint32Array){F=new Uint32Array(32);if(window.crypto&&window.crypto.getRandomValues)window.crypto.getRandomValues(F);else if(window.msCrypto&&window.msCrypto.getRandomValues)window.msCrypto.getRandomValues(F);
+else break a;sjcl.random.addEntropy(F,1024,"crypto['getRandomValues']")}}catch(a){"undefined"!==typeof window&&window.console&&(console.log("There was an error collecting entropy from the browser:"),console.log(a))}
+sjcl.json={defaults:{v:1,iter:1E3,ks:128,ts:64,mode:"ccm",adata:"",cipher:"aes"},ja:function(a,b,c,d){c=c||{};d=d||{};var e=sjcl.json,g=e.g({iv:sjcl.random.randomWords(4,0)},e.defaults),f;e.g(g,c);c=g.adata;"string"===typeof g.salt&&(g.salt=sjcl.codec.base64.toBits(g.salt));"string"===typeof g.iv&&(g.iv=sjcl.codec.base64.toBits(g.iv));if(!sjcl.mode[g.mode]||!sjcl.cipher[g.cipher]||"string"===typeof a&&100>=g.iter||64!==g.ts&&96!==g.ts&&128!==g.ts||128!==g.ks&&192!==g.ks&&0x100!==g.ks||2>g.iv.length||
+4<g.iv.length)throw new sjcl.exception.invalid("json encrypt: invalid parameters");"string"===typeof a?(f=sjcl.misc.cachedPbkdf2(a,g),a=f.key.slice(0,g.ks/32),g.salt=f.salt):sjcl.ecc&&a instanceof sjcl.ecc.elGamal.publicKey&&(f=a.kem(),g.kemtag=f.tag,a=f.key.slice(0,g.ks/32));"string"===typeof b&&(b=sjcl.codec.utf8String.toBits(b));"string"===typeof c&&(g.adata=c=sjcl.codec.utf8String.toBits(c));f=new sjcl.cipher[g.cipher](a);e.g(d,g);d.key=a;g.ct="ccm"===g.mode&&sjcl.arrayBuffer&&sjcl.arrayBuffer.ccm&&
+b instanceof ArrayBuffer?sjcl.arrayBuffer.ccm.encrypt(f,b,g.iv,c,g.ts):sjcl.mode[g.mode].encrypt(f,b,g.iv,c,g.ts);return g},encrypt:function(a,b,c,d){var e=sjcl.json,g=e.ja.apply(e,arguments);return e.encode(g)},ia:function(a,b,c,d){c=c||{};d=d||{};var e=sjcl.json;b=e.g(e.g(e.g({},e.defaults),b),c,!0);var g,f;g=b.adata;"string"===typeof b.salt&&(b.salt=sjcl.codec.base64.toBits(b.salt));"string"===typeof b.iv&&(b.iv=sjcl.codec.base64.toBits(b.iv));if(!sjcl.mode[b.mode]||!sjcl.cipher[b.cipher]||"string"===
+typeof a&&100>=b.iter||64!==b.ts&&96!==b.ts&&128!==b.ts||128!==b.ks&&192!==b.ks&&0x100!==b.ks||!b.iv||2>b.iv.length||4<b.iv.length)throw new sjcl.exception.invalid("json decrypt: invalid parameters");"string"===typeof a?(f=sjcl.misc.cachedPbkdf2(a,b),a=f.key.slice(0,b.ks/32),b.salt=f.salt):sjcl.ecc&&a instanceof sjcl.ecc.elGamal.secretKey&&(a=a.unkem(sjcl.codec.base64.toBits(b.kemtag)).slice(0,b.ks/32));"string"===typeof g&&(g=sjcl.codec.utf8String.toBits(g));f=new sjcl.cipher[b.cipher](a);g="ccm"===
+b.mode&&sjcl.arrayBuffer&&sjcl.arrayBuffer.ccm&&b.ct instanceof ArrayBuffer?sjcl.arrayBuffer.ccm.decrypt(f,b.ct,b.iv,b.tag,g,b.ts):sjcl.mode[b.mode].decrypt(f,b.ct,b.iv,g,b.ts);e.g(d,b);d.key=a;return 1===c.raw?g:sjcl.codec.utf8String.fromBits(g)},decrypt:function(a,b,c,d){var e=sjcl.json;return e.ia(a,e.decode(b),c,d)},encode:function(a){var b,c="{",d="";for(b in a)if(a.hasOwnProperty(b)){if(!b.match(/^[a-z0-9]+$/i))throw new sjcl.exception.invalid("json encode: invalid property name");c+=d+'"'+
+b+'":';d=",";switch(typeof a[b]){case "number":case "boolean":c+=a[b];break;case "string":c+='"'+escape(a[b])+'"';break;case "object":c+='"'+sjcl.codec.base64.fromBits(a[b],0)+'"';break;default:throw new sjcl.exception.bug("json encode: unsupported type");}}return c+"}"},decode:function(a){a=a.replace(/\s/g,"");if(!a.match(/^\{.*\}$/))throw new sjcl.exception.invalid("json decode: this isn't json!");a=a.replace(/^\{|\}$/g,"").split(/,/);var b={},c,d;for(c=0;c<a.length;c++){if(!(d=a[c].match(/^\s*(?:(["']?)([a-z][a-z0-9]*)\1)\s*:\s*(?:(-?\d+)|"([a-z0-9+\/%*_.@=\-]*)"|(true|false))$/i)))throw new sjcl.exception.invalid("json decode: this isn't json!");
+null!=d[3]?b[d[2]]=parseInt(d[3],10):null!=d[4]?b[d[2]]=d[2].match(/^(ct|adata|salt|iv)$/)?sjcl.codec.base64.toBits(d[4]):unescape(d[4]):null!=d[5]&&(b[d[2]]="true"===d[5])}return b},g:function(a,b,c){void 0===a&&(a={});if(void 0===b)return a;for(var d in b)if(b.hasOwnProperty(d)){if(c&&void 0!==a[d]&&a[d]!==b[d])throw new sjcl.exception.invalid("required parameter overridden");a[d]=b[d]}return a},sa:function(a,b){var c={},d;for(d in a)a.hasOwnProperty(d)&&a[d]!==b[d]&&(c[d]=a[d]);return c},ra:function(a,
+b){var c={},d;for(d=0;d<b.length;d++)void 0!==a[b[d]]&&(c[b[d]]=a[b[d]]);return c}};sjcl.encrypt=sjcl.json.encrypt;sjcl.decrypt=sjcl.json.decrypt;sjcl.misc.pa={};sjcl.misc.cachedPbkdf2=function(a,b){var c=sjcl.misc.pa,d;b=b||{};d=b.iter||1E3;c=c[a]=c[a]||{};d=c[d]=c[d]||{firstSalt:b.salt&&b.salt.length?b.salt.slice(0):sjcl.random.randomWords(2,0)};c=void 0===b.salt?d.firstSalt:b.salt;d[c]=d[c]||sjcl.misc.pbkdf2(a,c,b.iter);return{key:d[c].slice(0),salt:c.slice(0)}};
author	Dirk Engling <erdgeist@erdgeist.org>	2016-10-09 01:54:34 +0200
committer	Dirk Engling <erdgeist@erdgeist.org>	2016-10-09 01:54:34 +0200
commit	c932cd295d414f78c65167e7717b04f61e93122a (patch)
tree	aad57f7461ad72ba4ebf4e411f112e1eacb26ad0