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Diffstat (limited to 'app/assets/javascripts/srp/lib/cryptoHelpers.js')
| -rw-r--r-- | app/assets/javascripts/srp/lib/cryptoHelpers.js | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/app/assets/javascripts/srp/lib/cryptoHelpers.js b/app/assets/javascripts/srp/lib/cryptoHelpers.js deleted file mode 100644 index a77ee42..0000000 --- a/app/assets/javascripts/srp/lib/cryptoHelpers.js +++ /dev/null @@ -1,185 +0,0 @@ -/* - * cryptoHelpers.js: implements AES - Advanced Encryption Standard - * from the SlowAES project, http://code.google.com/p/slowaes/ - * - * Copyright (c) 2008 Josh Davis ( http://www.josh-davis.org ), - * Mark Percival ( http://mpercival.com ), - * Johan Sundstrom ( http://ecmanaut.blogspot.com ), - * John Resig ( http://ejohn.org ) - * - * Licensed under the Apache License, Version 2.0 - * http://www.apache.org/licenses/ - */ - - - -var cryptoHelpers = { - - // encodes a unicode string to UTF8 (8 bit characters are critical to AES functioning properly) - encode_utf8:function(s) - { - try{return unescape(encodeURIComponent(s));} - catch(e){throw 'error during utf8 encoding: cryptoHelpers.encode_utf8.';} - }, - - - // decodes a UTF8 string back to unicode - decode_utf8:function(s) - { - try{return decodeURIComponent(escape(s));} - catch(e){throw('error during utf8 decoding: cryptoHelpers.decode_utf8.');} - }, - - //convert a number array to a hex string - toHex:function() - { - var array = []; - if(arguments.length == 1 && arguments[0].constructor == Array) - array = arguments[0]; - else - array = arguments; - var ret = ''; - for(var i = 0;i < array.length;i++) - ret += (array[i] < 16 ? '0' : '') + array[i].toString(16); - return ret.toLowerCase(); - }, - - //convert a hex string to a number array - toNumbers:function(s) - { - var ret = []; - s.replace(/(..)/g,function(s){ - ret.push(parseInt(s,16)); - }); - return ret; - }, - - // get a random number in the range [min,max] - getRandom:function(min,max) - { - if(min === null) - min = 0; - if(max === null) - max = 1; - return Math.floor(Math.random()*(max+1)) + min; - }, - - generateSharedKey:function(len) - { - if(len === null) - len = 16; - var key = []; - for(var i = 0; i < len*2; i++) - key.push(this.getRandom(0,255)); - return key; - }, - - generatePrivateKey:function(s,size) - { - var sha = jsHash.sha2.arr_sha256(s); - return sha.slice(0,size); - }, - - convertStringToByteArray: function(s) - { - var byteArray = []; - for(var i = 0;i < s.length;i++) - { - byteArray.push(s.charCodeAt(i)); - } - return byteArray; - }, - - convertByteArrayToString: function(byteArray) - { - var s = ''; - for(var i = 0;i < byteArray.length;i++) - { - s += String.fromCharCode(byteArray[i]); - } - return s; - }, - - base64: { - // Takes a Nx16x1 byte array and converts it to Base64 - - chars: [ - 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', - 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', - 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', - 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', - 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', - 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', - 'w', 'x', 'y', 'z', '0', '1', '2', '3', - '4', '5', '6', '7', '8', '9', '+', '/', - '=' // for decoding purposes - ], - - encode_line: function(flatArr){ - var b64 = ''; - - for (var i = 0; i < flatArr.length; i += 3){ - b64 += this.chars[flatArr[i] >> 2]; - b64 += this.chars[((flatArr[i] & 3) << 4) | (flatArr[i + 1] >> 4)]; - if (!(flatArr[i + 1] === null)){ - b64 += this.chars[((flatArr[i + 1] & 15) << 2) | (flatArr[i + 2] >> 6)]; - }else{ - b64 += '='; - } - if (!(flatArr[i + 2] === null)){ - b64 += this.chars[flatArr[i + 2] & 63]; - }else{ - b64 += '='; - } - } - return b64; - }, - - encode: function(flatArr) - { - var b64 = this.encode_line(flatArr); - // OpenSSL is super particular about line breaks - var broken_b64 = b64.slice(0, 64) + '\n'; - for (var i = 1; i < (Math.ceil(b64.length / 64)); i++) - { - broken_b64 += b64.slice(i * 64, i * 64 + 64) + (Math.ceil(b64.length / 64) == i + 1 ? '': '\n'); - } - return broken_b64; - }, - - decode: function(string) - { - string = string.replace(/[\r\n\t ]+/g, '') + '===='; // drop all whitespaces and pad with '=' (end of b64 marker) - var flatArr = []; - var c = []; - //var b = []; - for (var i = 0; true ; i = i + 4){ - c[0] = this.chars.indexOf(string.charAt(i)); - if(c[0] == 64){ - return flatArr; - } - c[1] = this.chars.indexOf(string.charAt(i + 1)); - c[2] = this.chars.indexOf(string.charAt(i + 2)); - c[3] = this.chars.indexOf(string.charAt(i + 3)); - - if( - (c[0] < 0) || // char1 is wrong - (c[1] < 0) || (c[1] == 64) || // char2 is wrong - (c[2] < 0) || // char3 is neither an valid char nor '=' - (c[3] < 0) // char4 is neither an valid char nor '=' - ){ - throw 'error during base64 decoding at pos '+i+': cryptoHelpers.base64.decode.'; - } - - flatArr.push((c[0] << 2) | (c[1] >> 4)); - if(c[2] >= 0 && c[2] < 64){ - flatArr.push(((c[1] & 15) << 4) | (c[2] >> 2)); - if(c[3] >= 0 && c[2] < 64){ - flatArr.push(((c[2] & 3) << 6) | c[3]); - } - } - } - } - } -}; - |