c#和avascript加解密之间的互转代码分享
1：xxtea支持中文；
2：支持js和c#加解密之间的互转；
一：c#部分
class xxtea2
{
public static string encrypt(string source, string key)
{
system.text.encoding encoder = system.text.encoding.utf8;
//utf8==>base64==>xxtea==>base64
byte[] bytdata = encoder.getbytes(base64encode(source));
byte[] bytkey = encoder.getbytes(key);
if (bytdata.length == 0)
{
return "";
}
return system.convert.tobase64string(tobytearray(encrypt(touint32array(bytdata, true), touint32array(bytkey, false)), false));
}
public static string decrypt(string source, string key)
{
if (source.length == 0)
{
return "";
}
// reverse
system.text.encoding encoder = system.text.encoding.utf8;
byte[] bytdata = system.convert.frombase64string(source);
byte[] bytkey = encoder.getbytes(key);
return base64decode(encoder.getstring(tobytearray(decrypt(touint32array(bytdata, false), touint32array(bytkey, false)), true)));
}
private static uint32[] encrypt(uint32[] v, uint32[] k)
{
int32 n = v.length - 1;
if (n < 1)
{
return v;
}
if (k.length < 4)
{
uint32[] key = new uint32[4];
k.copyto(key, 0);
k = key;
}
uint32 z = v[n], y = v[0], delta = 0x9e3779b9, sum = 0, e;
int32 p, q = 6 + 52 / (n + 1);
while (q-- > 0)
{
sum = unchecked(sum + delta);
e = sum >> 2 & 3;
for (p = 0; p < n; p++)
{
y = v[p + 1];
z = unchecked(v[p] += (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
}
y = v[0];
z = unchecked(v[n] += (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
}
return v;
}
private static uint32[] decrypt(uint32[] v, uint32[] k)
{
int32 n = v.length - 1;
if (n < 1)
{
return v;
}
if (k.length < 4)
{
uint32[] key = new uint32[4];
k.copyto(key, 0);
k = key;
}
uint32 z = v[n], y = v[0], delta = 0x9e3779b9, sum, e;
int32 p, q = 6 + 52 / (n + 1);
sum = unchecked((uint32)(q * delta));
while (sum != 0)
{
e = sum >> 2 & 3;
for (p = n; p > 0; p--)
{
z = v[p - 1];
y = unchecked(v[p] -= (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
}
z = v[n];
y = unchecked(v[0] -= (z >> 5 ^ y << 2) + (y >> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z));
sum = unchecked(sum - delta);
}
return v;
}
private static uint32[] touint32array(byte[] data, boolean includelength)
{
int32 n = (((data.length & 3) == 0) ? (data.length >> 2) : ((data.length >> 2) + 1));
uint32[] result;
if (includelength)
{
result = new uint32[n + 1];
result[n] = (uint32)data.length;
}
else
{
result = new uint32[n];
}
n = data.length;
for (int32 i = 0; i < n; i++)
{
result[i >> 2] |= (uint32)data[i] << ((i & 3) << 3);
}
return result;
}
private static byte[] tobytearray(uint32[] data, boolean includelength)
{
int32 n;
if (includelength)
{
n = (int32)data[data.length - 1];
}
else
{
n = data.length << 2;
}
byte[] result = new byte[n];
for (int32 i = 0; i < n; i++)
{
result[i] = (byte)(data[i >> 2] >> ((i & 3) << 3));
}
return result;
}
public static string base64decode(string data)
{
try
{
var encoder = system.text.encoding.utf8;
byte[] todecode_byte = convert.frombase64string(data);
return encoder.getstring(todecode_byte);
}
catch (exception e)
{
throw new exception("error in base64decode" + e.message);
}
}
public static string base64encode(string data)
{
try
{
byte[] encdata_byte = new byte[data.length];
encdata_byte = system.text.encoding.utf8.getbytes(data);
string encodeddata = convert.tobase64string(encdata_byte);
return encodeddata;
}
catch (exception e)
{
throw new exception("error in base64encode" + e.message);
}
}
二：js部分
//***************************************************************************************
// autor:tecky
// var prefix = xt
// update:
//***************************************************************************************
function xxtea(privatekey) {
this._keystring = privatekey;
}
//将长整形转换为string,private
xxtea.prototype._long2str = function (v, w) {
var vl = v.length;
var n = (vl - 1) << 2;
if (w) {
var m = v[vl - 1];
if ((m < n - 3) || (m > n)) return null;
n = m;
}
for (var i = 0; i < vl; i++) {
v[i] = string.fromcharcode(v[i] & 0xff,
v[i] >>> 8 & 0xff,
v[i] >>> 16 & 0xff,
v[i] >>> 24 & 0xff);
}
if (w) {
return v.join('').substring(0, n);
}
else {
return v.join('');
}
}
//将string转换为long,private
xxtea.prototype._str2long = function (s, w) {
var len = s.length;
var v = [];
for (var i = 0; i < len; i += 4) {
v[i >> 2] = s.charcodeat(i)
| s.charcodeat(i + 1) << 8
| s.charcodeat(i + 2) << 16
| s.charcodeat(i + 3) << 24;
}
if (w) {
v[v.length] = len;
}
return v;
}
//function: encrypt str with private key by xxtea
xxtea.prototype.xxtea_encrypt = function (str) {
if (str == "") {
return "";
}
str = base64.encode64(utfparser.utf16to8(str));
var v = this._str2long(str, true);
var k = this._str2long(this._keystring, false);
if (k.length < 4) {
k.length = 4;
}
var n = v.length - 1;
var z = v[n], y = v[0], delta = 0x9e3779b9;
var mx, e, p, q = math.floor(6 + 52 / (n + 1)), sum = 0;
while (0 < q--) {
sum = sum + delta & 0xffffffff;
e = sum >>> 2 & 3;
for (p = 0; p < n; p++) {
y = v[p + 1];
mx = (z >>> 5 ^ y << 2) + (y >>> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z);
z = v[p] = v[p] + mx & 0xffffffff;
}
y = v[0];
mx = (z >>> 5 ^ y << 2) + (y >>> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z);
z = v[n] = v[n] + mx & 0xffffffff;
}
return base64.encode64(this._long2str(v, false));
}
//function: decrypt str with private key by xxtea
xxtea.prototype.xxtea_decrypt = function (str) {
if (str == "") {
return "";
}
str = base64.decode64(str);
var v = this._str2long(str, false);
var k = this._str2long(this._keystring, false);
if (k.length < 4) {
k.length = 4;
}
var n = v.length - 1;
var z = v[n - 1], y = v[0], delta = 0x9e3779b9;
var mx, e, p, q = math.floor(6 + 52 / (n + 1)), sum = q * delta & 0xffffffff;
while (sum != 0) {
e = sum >>> 2 & 3;
for (p = n; p > 0; p--) {
z = v[p - 1];
mx = (z >>> 5 ^ y << 2) + (y >>> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z);
y = v[p] = v[p] - mx & 0xffffffff;
}
z = v[n];
mx = (z >>> 5 ^ y << 2) + (y >>> 3 ^ z << 4) ^ (sum ^ y) + (k[p & 3 ^ e] ^ z);
y = v[0] = v[0] - mx & 0xffffffff;
sum = sum - delta & 0xffffffff;
}
return utfparser.utf8to16(base64.decode64(this._long2str(v, true)));
}
//class:utf16 to utf8, utf8 ot utf16
//author:tecky
//date:2008-06-03
function utfparser() {
//all method is static
}
//function:change utf16 to utf8
//parms(str):string that you want to change
utfparser.utf16to8 = function (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:change utf8 to utf16
//parms(str):string that you want to change
utfparser.utf8to16 = function (str) {
str = str.tostring();
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;
}
// class:base64 encode & decode
// autor:tecky
// date:2008-06-03
function base64() {
//all method is static
}
//static
base64._keystr = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=";
base64.encode64 = function (input) {
var output = "";
var chr1, chr2, chr3 = "";
var enc1, enc2, enc3, enc4 = "";
var i = 0;
do {
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 +
base64._keystr.charat(enc1) +
base64._keystr.charat(enc2) +
base64._keystr.charat(enc3) +
base64._keystr.charat(enc4);
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";
} while (i < input.length);
return output;
}
base64.decode64 = function (input) {
var output = "";
var chr1, chr2, chr3 = "";
var enc1, enc2, enc3, enc4 = "";
var i = 0;
// remove all characters that are not a-z, a-z, 0-9, +, /, or =
var base64test = /[^a-za-z0-9\+\/\=\n]/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, "");
do {
enc1 = base64._keystr.indexof(input.charat(i++));
enc2 = base64._keystr.indexof(input.charat(i++));
enc3 = base64._keystr.indexof(input.charat(i++));
enc4 = base64._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);
}
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";
} while (i < input.length);
return output;
}
[/code]