php中base64和js中base64可互相加解密
前提:加解密的字符必须转换成UTF-8编码格式。
php代码:
- <?php
- $str='中国航母辽宁号-歼15战机GOOD=ok';
- echo $encode_str= base64_encode($str);
- echo '<br />';
- echo base64_decode($encode_str);
- ?>
js代码:
- <script language='javascript'>
- function utf16to8(str) {
- var out, i, len, c;
- out = "";
- len = str.length;
- for(i = 0; i < len; i++) {
- c = str.charCodeAt(i);
- if ((c >= 0x0001) && (c <= 0x007F)) {
- out += str.charAt(i);
- } else if (c > 0x07FF) {
- out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
- out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
- out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
- } else {
- out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
- out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
- }
- }
- return out;
- }
- function utf8to16(str) {
- var out, i, len, c;
- var char2, char3;
- out = "";
- len = str.length;
- i = 0;
- while(i < len) {
- c = str.charCodeAt(i++);
- switch(c >> 4)
- {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
- // 0xxxxxxx
- out += str.charAt(i-1);
- break;
- case 12: case 13:
- // 110x xxxx 10xx xxxx
- char2 = str.charCodeAt(i++);
- out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
- break;
- case 14:
- // 1110 xxxx 10xx xxxx 10xx xxxx
- char2 = str.charCodeAt(i++);
- char3 = str.charCodeAt(i++);
- out += String.fromCharCode(((c & 0x0F) << 12) |
- ((char2 & 0x3F) << 6) |
- ((char3 & 0x3F) << 0));
- break;
- }
- }
- return out;
- }
- var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- var base64DecodeChars = new Array(
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
- -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
- function base64encode(str) {
- var out, i, len;
- var c1, c2, c3;
- len = str.length;
- i = 0;
- out = "";
- while(i < len) {
- c1 = str.charCodeAt(i++) & 0xff;
- if(i == len)
- {
- out += base64EncodeChars.charAt(c1 >> 2);
- out += base64EncodeChars.charAt((c1 & 0x3) << 4);
- out += "==";
- break;
- }
- c2 = str.charCodeAt(i++);
- if(i == len)
- {
- out += base64EncodeChars.charAt(c1 >> 2);
- out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
- out += base64EncodeChars.charAt((c2 & 0xF) << 2);
- out += "=";
- break;
- }
- c3 = str.charCodeAt(i++);
- out += base64EncodeChars.charAt(c1 >> 2);
- out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
- out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
- out += base64EncodeChars.charAt(c3 & 0x3F);
- }
- return out;
- }
- function base64decode(str) {
- var c1, c2, c3, c4;
- var i, len, out;
- len = str.length;
- i = 0;
- out = "";
- while(i < len) {
- /* c1 */
- do {
- c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
- } while(i < len && c1 == -1);
- if(c1 == -1)
- break;
- /* c2 */
- do {
- c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
- } while(i < len && c2 == -1);
- if(c2 == -1)
- break;
- out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
- /* c3 */
- do {
- c3 = str.charCodeAt(i++) & 0xff;
- if(c3 == 61)
- return out;
- c3 = base64DecodeChars[c3];
- } while(i < len && c3 == -1);
- if(c3 == -1)
- break;
- out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
- /* c4 */
- do {
- c4 = str.charCodeAt(i++) & 0xff;
- if(c4 == 61)
- return out;
- c4 = base64DecodeChars[c4];
- } while(i < len && c4 == -1);
- if(c4 == -1)
- break;
- out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
- }
- return out;
- }
- function str_decode(str){
- return utf8to16(base64decode(str));
- }
- function str_encode(str){
- return base64encode(utf16to8(str));
- }
- var str='中国航母辽宁号-歼15战机GOOD=ok';
- var encode_str=str_encode(str);
- document.write(encode_str);
- document.write('<br />');
- var decode_str=str_decode(encode_str);
- document.write(decode_str);
- </script>
两者输出结果(一模一样):
5Lit5Zu96Iiq5q+N6L695a6B5Y+3LeatvDE15oiY5py6R09PRD1vaw==
中国航母辽宁号-歼15战机GOOD=ok
5Lit5Zu96Iiq5q+N6L695a6B5Y+3LeatvDE15oiY5py6R09PRD1vaw==
中国航母辽宁号-歼15战机GOOD=ok
本文转自许琴 51CTO博客,原文链接:http://blog.51cto.com/xuqin/1071762,如需转载请自行联系原作者