www.gusucode.com > ROCKOA PHP协同办公OA办公系统 v2.0PHP源码程序 > ROCKOA PHP协同办公OA办公系统 v2.0/rockoa_v2.0/rockoa_v2.0/js/base64.js
/** 加密解密 */ function Jiami() { var _keyStr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; var _sstr = 'abcdefghijklmnopqrstuvwxyz'; // public method for encoding this.base64encode = function (input) { var output = ""; var chr1, chr2, chr3, enc1, enc2, enc3, enc4,s; var i = 0; input = _utf8_encode(input); while (i < input.length) { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) { enc3 = enc4 = 64; } else if (isNaN(chr3)) { enc4 = 64; } output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4); } s = output; s = s.replace(/\+/g, '!'); s = s.replace(/\//g, '.'); s = s.replace(/\=/g, ':'); return s; } //加密 this.encrypt = function(str){ if(!str)return ''; var s = this.base64encode(str); s = _encode(s); return s; } //解密 this.uncrypt = function(str){ if(!str)return ''; var s = _decode(str); s = this.base64decode(s); return s; } var _encode = function(s){ var s1 = '',s2 = '', len= s.length,i,j, a = _sstr,s3, r = parseInt(Math.random()*14)+1; if(r==10)r++; for(i=0; i<len; i++){ s2 = s.charCodeAt(i).toString(); s1+= '0'; for(j=0; j<s2.length; j++){ s3 = parseInt(s2.substr(j, 1))+r; s1+= a.substr(s3, 1); } } if(s1!=''){ s1 = s1.substr(1); s1+='0'+r+''; } return s1; } var _decode = function(s){ s = s.replace(/[^a-z0-9]/g, ''); var s1 = '',s2 = '',s3,s4, a1 = _sstr,a={},i,j,na,r,len; for(i=0; i<a1.length; i++)a[a1.substr(i, 1)] = i; na = s.split('0'); len= na.length; r = parseInt(na[len-1]); for(i=0; i<len-1; i++){ s2 = na[i]; s3 = ''; for(j=0; j<s2.length; j++){ s4 = parseInt(a[s2.substr(j,1)]) - r; s3+= s4.toString(); } s3 = parseInt(s3); s1+= String.fromCharCode(s3).toString(); } return s1; } // public method for decoding this.base64decode = function (input) { var output = ''; var chr1, chr2, chr3; var enc1, enc2, enc3, enc4; var i = 0; input = input.replace(/\!/g, '+'); input = input.replace(/\./g, '/'); input = input.replace(/\:/g, '='); input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ''); while (i < input.length) { enc1 = _keyStr.indexOf(input.charAt(i++)); enc2 = _keyStr.indexOf(input.charAt(i++)); enc3 = _keyStr.indexOf(input.charAt(i++)); enc4 = _keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4; output = output + String.fromCharCode(chr1); if (enc3 != 64) { output = output + String.fromCharCode(chr2); } if (enc4 != 64) { output = output + String.fromCharCode(chr3); } } output = _utf8_decode(output); return output; } // private method for UTF-8 encoding var _utf8_encode = function (string) { string = string.replace(/\r\n/g,"\n"); var utftext = ""; for (var n = 0; n < string.length; n++) { var c = string.charCodeAt(n); if (c < 128) { utftext += String.fromCharCode(c); } else if((c > 127) && (c < 2048)) { utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else { utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } return utftext; } // private method for UTF-8 decoding var _utf8_decode = function (utftext) { var string = ""; var i = 0; var c = c1 = c2 = 0; while ( i < utftext.length ) { c = utftext.charCodeAt(i); if (c < 128) { string += String.fromCharCode(c); i++; } else if((c > 191) && (c < 224)) { c2 = utftext.charCodeAt(i+1); string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); i += 2; } else { c2 = utftext.charCodeAt(i+1); c3 = utftext.charCodeAt(i+2); string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } return string; } } var jm = new Jiami();