一般情况我们都是php加密再由php解密了,但是我的工作就碰到了必须由php加密然后由js来解密了,这种情况我找到一站长写的例子,非常的优秀下面我们一起来看看.
PHP加密函数,代码如下:
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<?php
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function strencode($string) {
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$string = base64_encode($string);
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$key = md5('just a test');
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$len = strlen($key);
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$code = '';
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for ($i = 0; $i < strlen($string); $i++) {
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$k = $i % $len;
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$code .= $string [$i] ^ $key [$k];
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}
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return base64_encode($code);
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}
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echo strencode('just a test');
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?>
JS:解密,代码如下:
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<script src="md5.js"></script>
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<script src="base64.js"></script>
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<script>
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function strencode(string) {
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key =md5('just a test');
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string = Base64.decode(string);
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len = key.length;
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code = '';
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for (i = 0; i < string.length; i++) {
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k = i % len;
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code += String.fromCharCode(string.charCodeAt(i) ^ key.charCodeAt(k));
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}
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return Base64.decode(code);
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}
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alert(strencode('U1s1TFN3IQ0reTZbBgJlCA===='));
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</script>
js MD5,代码如下:
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var hexcase = 0;
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var b64pad = "";
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-
-
-
-
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function md5(s) {
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return rstr2hex(rstr_md5(str2rstr_utf8(s)));
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}
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function b64_md5(s) {
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return rstr2b64(rstr_md5(str2rstr_utf8(s)));
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}
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function any_md5(s, e) {
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return rstr2any(rstr_md5(str2rstr_utf8(s)), e);
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}
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function hex_hmac_md5(k, d)
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{
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return rstr2hex(rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d)));
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}
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function b64_hmac_md5(k, d)
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{
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return rstr2b64(rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d)));
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}
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function any_hmac_md5(k, d, e)
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{
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return rstr2any(rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d)), e);
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}
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-
-
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function md5_vm_test()
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{
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return hex_md5("abc").toLowerCase() == "900150983cd24fb0d6963f7d28e17f72";
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}
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-
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function rstr_md5(s)
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{
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return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));
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}
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-
-
-
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function rstr_hmac_md5(key, data)
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{
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var bkey = rstr2binl(key);
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if(bkey.length > 16) bkey = binl_md5(bkey, key.length * 8);
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var ipad = Array(16), opad = Array(16);
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for(var i = 0; i < 16; i++)
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{
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ipad[i] = bkey[i] ^ 0x36363636;
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opad[i] = bkey[i] ^ 0x5C5C5C5C;
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}
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var hash = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
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return binl2rstr(binl_md5(opad.concat(hash), 512 + 128));
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}
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-
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function rstr2hex(input)
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{
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try {
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hexcase
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} catch(e) {
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hexcase=0;
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}
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var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
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var output = "";
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var x;
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for(var i = 0; i < input.length; i++)
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{
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x = input.charCodeAt(i);
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output += hex_tab.charAt((x >>> 4) & 0x0F)
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+ hex_tab.charAt( x & 0x0F);
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}
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return output;
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}
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function rstr2b64(input)
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{
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try {
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b64pad
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} catch(e) {
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b64pad='';
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}
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var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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var output = "";
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var len = input.length;
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for(var i = 0; i < len; i += 3)
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{
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var triplet = (input.charCodeAt(i) << 16)
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| (i + 1 < len ? input.charCodeAt(i+1) << 8 : 0)
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| (i + 2 < len ? input.charCodeAt(i+2) : 0);
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for(var j = 0; j < 4; j++)
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{
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if(i * 8 + j * 6 > input.length * 8) output += b64pad;
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else output += tab.charAt((triplet >>> 6*(3-j)) & 0x3F);
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}
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}
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return output;
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}
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function rstr2any(input, encoding)
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{
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var divisor = encoding.length;
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var i, j, q, x, quotient;
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-
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var dividend = Array(Math.ceil(input.length / 2));
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for(i = 0; i < dividend.length; i++)
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{
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dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
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}
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-
-
-
-
-
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var full_length = Math.ceil(input.length * 8 /
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(Math.log(encoding.length) / Math.log(2)));
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var remainders = Array(full_length);
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for(j = 0; j < full_length; j++)
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{
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quotient = Array();
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x = 0;
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for(i = 0; i < dividend.length; i++)
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{
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x = (x << 16) + dividend[i];
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q = Math.floor(x / divisor);
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x -= q * divisor;
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if(quotient.length > 0 || q > 0)
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quotient[quotient.length] = q;
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}
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remainders[j] = x;
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dividend = quotient;
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}
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-
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var output = "";
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for(i = remainders.length - 1; i >= 0; i--)
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output += encoding.charAt(remainders[i]);
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return output;
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}
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-
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function str2rstr_utf8(input)
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{
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var output = "";
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var i = -1;
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var x, y;
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while(++i < input.length)
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{
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x = input.charCodeAt(i);
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y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
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if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF)
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{
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x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
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i++;
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}
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-
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if(x <= 0x7F)
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output += String.fromCharCode(x);
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else if(x <= 0x7FF)
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output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F),
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0x80 | ( x & 0x3F));
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else if(x <= 0xFFFF)
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output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
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0x80 | ((x >>> 6 ) & 0x3F),
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0x80 | ( x & 0x3F));
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else if(x <= 0x1FFFFF)
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output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
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0x80 | ((x >>> 12) & 0x3F),
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0x80 | ((x >>> 6 ) & 0x3F),
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0x80 | ( x & 0x3F));
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}
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return output;
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}
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-
-
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function str2rstr_utf16le(input)
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{
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var output = "";
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for(var i = 0; i < input.length; i++)
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output += String.fromCharCode( input.charCodeAt(i) & 0xFF,
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(input.charCodeAt(i) >>> 8) & 0xFF);
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return output;
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}
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function str2rstr_utf16be(input)
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{
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var output = "";
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for(var i = 0; i < input.length; i++)
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output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
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input.charCodeAt(i) & 0xFF);
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return output;
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}
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-
-
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function rstr2binl(input)
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{
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var output = Array(input.length >> 2);
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for(var i = 0; i < output.length; i++)
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output[i] = 0;
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for(var i = 0; i < input.length * 8; i += 8)
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output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (i%32);
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return output;
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}
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function binl2rstr(input)
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{
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var output = "";
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for(var i = 0; i < input.length * 32; i += 8)
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output += String.fromCharCode((input[i>>5] >>> (i % 32)) & 0xFF);
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return output;
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}
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function binl_md5(x, len)
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{
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x[len >> 5] |= 0x80 << ((len) % 32);
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x[(((len + 64) >>> 9) << 4) + 14] = len;
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var a = 1732584193;
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var b = -271733879;
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var c = -1732584194;
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var d = 271733878;
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for(var i = 0; i < x.length; i += 16)
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{
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var olda = a;
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var oldb = b;
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var oldc = c;
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var oldd = d;
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a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
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d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
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c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819);
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b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
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a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
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d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426);
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c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
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b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
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a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
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d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
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c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
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b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
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a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682);
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d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
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c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
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b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329);
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a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
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d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
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c = md5_gg(c, d, a, b, x[i+11], 14, 643717713);
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b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
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a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
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d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083);
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c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
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b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
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a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438);
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d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
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c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
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b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501);
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a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
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d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
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c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473);
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b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
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a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
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d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
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c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562);
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b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
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a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
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d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353);
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c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
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b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
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a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174);
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d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
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c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
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b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189);
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a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
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d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
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c = md5_hh(c, d, a, b, x[i+15], 16, 530742520);
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b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
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a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
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d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415);
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c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
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b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
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a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571);
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d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
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c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
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b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
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a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
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d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
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c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
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b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649);
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a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
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d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
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c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259);
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b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
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a = safe_add(a, olda);
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b = safe_add(b, oldb);
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c = safe_add(c, oldc);
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d = safe_add(d, oldd);
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}
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return Array(a, b, c, d);
-
}
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-
-
-
-
function md5_cmn(q, a, b, x, s, t)
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{
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return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
-
}
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function md5_ff(a, b, c, d, x, s, t)
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{
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return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
-
}
-
function md5_gg(a, b, c, d, x, s, t)
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{
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return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
-
}
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function md5_hh(a, b, c, d, x, s, t)
-
{
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return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-
}
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function md5_ii(a, b, c, d, x, s, t)
-
{
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return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
-
}
-
-
-
-
-
-
function safe_add(x, y)
-
{
-
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
-
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-
return (msw << 16) | (lsw & 0xFFFF);
-
}
-
-
-
-
-
function bit_rol(num, cnt)
-
{
-
return (num << cnt) | (num >>> (32 - cnt));
-
}
js base64,代码如下:
-
(function(global) {
-
'use strict';
-
-
var _Base64 = global.Base64;
-
var version = "2.1.4";
-
-
var buffer;
-
if (typeof module !== 'undefined' && module.exports) {
-
buffer = require('buffer').Buffer;
-
}
-
-
var b64chars
-
= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
-
var b64tab = function(bin) {
-
var t = {};
-
for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
-
return t;
-
}(b64chars);
-
var fromCharCode = String.fromCharCode;
-
-
var cb_utob = function(c) {
-
if (c.length < 2) {
-
var cc = c.charCodeAt(0);
-
return cc < 0x80 ? c
-
: cc < 0x800 ? (fromCharCode(0xc0 | (cc >>> 6))
-
+ fromCharCode(0x80 | (cc & 0x3f)))
-
: (fromCharCode(0xe0 | ((cc >>> 12) & 0x0f))
-
+ fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
-
+ fromCharCode(0x80 | ( cc & 0x3f)));
-
} else {
-
var cc = 0x10000
-
+ (c.charCodeAt(0) - 0xD800) * 0x400
-
+ (c.charCodeAt(1) - 0xDC00);
-
return (fromCharCode(0xf0 | ((cc >>> 18) & 0x07))
-
+ fromCharCode(0x80 | ((cc >>> 12) & 0x3f))
-
+ fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
-
+ fromCharCode(0x80 | ( cc & 0x3f)));
-
}
-
};
-
var re_utob = /[uD800-uDBFF][uDC00-uDFFFF]|[^x00-x7F]/g;
-
var utob = function(u) {
-
return u.replace(re_utob, cb_utob);
-
};
-
var cb_encode = function(ccc) {
-
var padlen = [0, 2, 1][ccc.length % 3],
-
ord = ccc.charCodeAt(0) << 16
-
| ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8)
-
| ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)),
-
chars = [
-
b64chars.charAt( ord >>> 18),
-
b64chars.charAt((ord >>> 12) & 63),
-
padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63),
-
padlen >= 1 ? '=' : b64chars.charAt(ord & 63)
-
];
-
return chars.join('');
-
};
-
var btoa = global.btoa ? function(b) {
-
return global.btoa(b);
-
} : function(b) {
-
return b.replace(/[sS]{1,3}/g, cb_encode);
-
};
-
var _encode = buffer
-
? function (u) {
-
return (new buffer(u)).toString('base64')
-
}
-
: function (u) {
-
return btoa(utob(u))
-
}
-
;
-
var encode = function(u, urisafe) {
-
return !urisafe
-
? _encode(u)
-
: _encode(u).replace(/[+/]/g, function(m0) {
-
return m0 == '+' ? '-' : '_';
-
}).replace(/=/g, '');
-
};
-
var encodeURI = function(u) {
-
return encode(u, true)
-
};
-
-
var re_btou = new RegExp([
-
'[xC0-xDF][x80-xBF]',
-
'[xE0-xEF][x80-xBF]{2}',
-
'[xF0-xF7][x80-xBF]{3}'
-
].join('|'), 'g');
-
var cb_btou = function(cccc) {
-
switch(cccc.length) {
-
case 4:
-
var cp = ((0x07 & cccc.charCodeAt(0)) << 18)
-
| ((0x3f & cccc.charCodeAt(1)) << 12)
-
| ((0x3f & cccc.charCodeAt(2)) << 6)
-
| (0x3f & cccc.charCodeAt(3)),
-
offset = cp - 0x10000;
-
return (fromCharCode((offset >>> 10) + 0xD800)
-
+ fromCharCode((offset & 0x3FF) + 0xDC00));
-
case 3:
-
return fromCharCode(
-
((0x0f & cccc.charCodeAt(0)) << 12)
-
| ((0x3f & cccc.charCodeAt(1)) << 6)
-
| (0x3f & cccc.charCodeAt(2))
-
);
-
default:
-
return fromCharCode(
-
((0x1f & cccc.charCodeAt(0)) << 6)
-
| (0x3f & cccc.charCodeAt(1))
-
);
-
}
-
};
-
var btou = function(b) {
-
return b.replace(re_btou, cb_btou);
-
};
-
var cb_decode = function(cccc) {
-
var len = cccc.length,
-
padlen = len % 4,
-
n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0)
-
| (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0)
-
| (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0)
-
| (len > 3 ? b64tab[cccc.charAt(3)] : 0),
-
chars = [
-
fromCharCode( n >>> 16),
-
fromCharCode((n >>> 8) & 0xff),
-
fromCharCode( n & 0xff)
-
];
-
chars.length -= [0, 0, 2, 1][padlen];
-
return chars.join('');
-
};
-
var atob = global.atob ? function(a) {
-
return global.atob(a);
-
} : function(a){
-
return a.replace(/[sS]{1,4}/g, cb_decode);
-
};
-
var _decode = buffer
-
? function(a) {
-
return (new buffer(a, 'base64')).toString()
-
}
-
: function(a) {
-
return btou(atob(a))
-
};
-
var decode = function(a){
-
return _decode(
-
a.replace(/[-_]/g, function(m0) {
-
return m0 == '-' ? '+' : '/'
-
})
-
.replace(/[^A-Za-z0-9+/]/g, '')
-
);
-
};
-
var noConflict = function() {
-
var Base64 = global.Base64;
-
global.Base64 = _Base64;
-
return Base64;
-
};
-
-
global.Base64 = {
-
VERSION: version,
-
atob: atob,
-
btoa: btoa,
-
fromBase64: decode,
-
toBase64: encode,
-
utob: utob,
-
encode: encode,
-
encodeURI: encodeURI,
-
btou: btou,
-
decode: decode,
-
noConflict: noConflict
-
};
-
-
if (typeof Object.defineProperty === 'function') {
-
var noEnum = function(v){
-
return {
-
value:v,
-
enumerable:false,
-
writable:true,
-
configurable:true
-
};
-
};
-
global.Base64.extendString = function () {
-
Object.defineProperty(
-
String.prototype, 'fromBase64', noEnum(function () {
-
return decode(this)
-
}));
-
Object.defineProperty(
-
String.prototype, 'toBase64', noEnum(function (urisafe) {
-
return encode(this, urisafe)
-
}));
-
Object.defineProperty(
-
String.prototype, 'toBase64URI', noEnum(function () {
-
return encode(this, true)
-
}));
-
};
-
}
-
-
})(this);
最后把下面的很长的js分别保存为base64.js文件与md5.js文件,然后在要解密的文件中加载这两个js即可.
(责任编辑:最模板) |