using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace EmptyProject
{
///
/// 自定义可逆加解密算法，数据、密码，可以为任意字符串；
/// 1、加密 Locker.Encrypt()
/// 2、解密 Locker.Decrypt()
///
public class Locker
{
public static void example()
{
string data = Locker.Encrypt("待加密的数据信息", "自定义密码");
string result = Locker.Decrypt("9olrx3xiueqa9iegopfqskl2updirdfp922o0zi1tqxsltks", "自定义密码");
//MessageBox.Show(data.Equals("9olrx3xiueqa9iegopfqskl2updirdfp922o0zi1tqxsltks") + ""); // true
//MessageBox.Show(result.Equals("待加密的数据信息") + ""); // true
}
///
/// 使用SecretKey对数据data进行加密
///
/// 待加密的数据
/// 自定义密码串
///
public static string Encrypt(string data, string SecretKey)
{
string key = MD5.Encrypt(SecretKey);
data = Encoder.EncodeAlphabet(data);
StringBuilder builder = new StringBuilder();
int i = 0;
foreach (char A in data)
{
if (i >= key.Length)
{
i = i % key.Length;
key = MD5.Encrypt(key);
}
char B = key[i++];
char n = ToChar(ToInt(A) + ToInt(B) * 3);
builder.Append(n);
}
return builder.ToString();
}
///
/// 使用SecretKey对数据data进行解密
///
/// 待解密的数据
/// 解密密码串
///
public static string Decrypt(string data, string SecretKey)
{
string key = MD5.Encrypt(SecretKey);
StringBuilder builder = new StringBuilder();
int i = 0;
foreach (char A in data)
{
if (i >= key.Length)
{
i = i % key.Length;
key = MD5.Encrypt(key);
}
char B = key[i++];
char n = ToChar(ToInt(A) - ToInt(B) * 3);
builder.Append(n);
}
data = builder.ToString();
data = Encoder.DecodeAlphabet(data);
return data;
}
///
/// "0-9 a-z"映射为 0到35
///
///
///
private static int ToInt(char c)
{
if ('0' <= c && c <= '9') return c - '0';
else if ('a' <= c && c <= 'z') return 10 + c - 'a';
else return 0;
}
///
/// 0到35依次映射为"0-9 a-z"，
/// 超出35取余数映射
///
///
///
private static char ToChar(int n)
{
if (n >= 36) n = n % 36;
else if (n < 0) n = n % 36 + 36;
if (n > 9) return (char)(n - 10 + 'a');
else return (char)(n + '0');
}
/////
///// "0-9 a-z A-Z"映射为 0到9 10到35 36到61
/////
/////
/////
//public static int ToInt(char c)
//{
// if ('0' <= c && c <= '9') return c - '0';
// else if ('a' <= c && c <= 'z') return 10 + c - 'a';
// else if ('A' <= c && c <= 'Z') return 36 + c - 'A';
// else return 0;
//}
/////
///// 0到61依次映射为"0-9 a-z A-Z"，
///// 超出61取余数映射
/////
/////
/////
//public static char ToChar(int n)
//{
// if (n >= 62) n = n % 62;
// else if (n < 0) n = n % 62 + 62;
// if (n > 35) return (char)(n - 36 + 'A');
// else if (n > 9) return (char)(n - 10 + 'a');
// else return (char)(n + '0');
//}
}
}
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace EmptyProject
{
public class Encoder
{
public static void example()
{
String data = "test encode";
string encode = Encode(data);
string decode = Decode(encode);
bool b = data.Equals(decode);
bool b2 = b;
}
///
/// 转码data为全字母串，并添加前缀
///
public static string Encode(string data)
{
string str = data;
if (!data.StartsWith("ALPHABETCODE@"))
{
str = "ALPHABETCODE@" + EncodeAlphabet(data);
}
return str;
}
///
/// 解析字母串为原有串
///
public static string Decode(string data)
{
string str = data;
if (data.StartsWith("ALPHABETCODE@"))
{
str = DecodeAlphabet(data.Substring("ALPHABETCODE@".Length));
}
return str;
}
///
/// 获取文件对应的编码字符串
///
public static string getFileData(string file)
{
byte[] bytes = File2Bytes(file);
string data = ToStr(bytes);
return data;
}
///
/// 将文件转换为byte数组
///
/// 文件地址
/// 转换后的byte数组
public static byte[] File2Bytes(string path)
{
if (!File.Exists(path))
{
return new byte[0];
}
FileInfo fi = new FileInfo(path);
byte[] buff = new byte[fi.Length];
FileStream fs = fi.OpenRead();
fs.Read(buff, 0, Convert.ToInt32(fs.Length));
fs.Close();
return buff;
}
///
/// 获取文件中的数据,自动判定编码格式
///
private static string fileToString(String filePath)
{
byte[] bytes = File2Bytes(filePath);
string str = Encoding.UTF8.GetString(bytes);
return str;
}
# region 字符串字母编码逻辑
///
/// 转化为字母字符串
///
public static string EncodeAlphabet(string data)
{
byte[] B = Encoding.UTF8.GetBytes(data);
return ToStr(B);
}
///
/// 每个字节转化为两个字母
///
private static string ToStr(byte[] B)
{
StringBuilder Str = new StringBuilder();
foreach (byte b in B)
{
Str.Append(ToStr(b));
}
return Str.ToString();
}
private static string ToStr(byte b)
{
return "" + ToChar(b / 16) + ToChar(b % 16);
}
private static char ToChar(int n)
{
return (char)('a' + n);
}
///
/// 解析字母字符串
///
public static string DecodeAlphabet(string data)
{
byte[] B = ToBytes(data);
return Encoding.UTF8.GetString(B);
}
///
/// 解析字符串为Bytes数组
///
public static byte[] ToBytes(string data)
{
byte[] B = new byte[data.Length / 2];
char[] C = data.ToCharArray();
for (int i = 0; i < C.Length; i += 2)
{
byte b = ToByte(C[i], C[i + 1]);
B[i / 2] = b;
}
return B;
}
///
/// 每两个字母还原为一个字节
///
private static byte ToByte(char a1, char a2)
{
return (byte)((a1 - 'a') * 16 + (a2 - 'a'));
}
# endregion
}
}
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace EmptyProject
{
//示例：
// MD5.Encrypt("a"); // 计算字符串MD5值
// MD5.Encrypt(new FileInfo("D:\\1.rar")); // 计算文件MD5值
// MD5.Encrypt(byte[] Bytes); // 计算Byte数组MD5值
//MD5 ("") = d41d8cd98f00b204e9800998ecf8427e
//MD5 ("a") = 0cc175b9c0f1b6a831c399e269772661
//MD5 ("abc") = 900150983cd24fb0d6963f7d28e17f72
//MD5 ("message digest") = f96b697d7cb7938d525a2f31aaf161d0
//MD5 ("abcdefghijklmnopqrstuvwxyz") = c3fcd3d76192e4007dfb496cca67e13b
class MD5
{
#region MD5调用接口
///
/// 计算data的MD5值
///
public static string Encrypt(string data)
{
uint[] X = To16Array(data);
string Str = ToNativeStr(X);
return calculate(X);
}
///
/// 计算byte数组的MD5值
///
public static string Encrypt(byte[] Bytes)
{
uint[] X = To16Array(Bytes);
return calculate(X);
}
///
/// 计算文件的MD5值
///
public static string Encrypt(FileInfo file)
{
uint[] X = To16Array(file);
return calculate(X);
}
#endregion
#region MD5计算逻辑
///
/// 转化byte数组为uint数组，数组长度为16的倍数
///
/// 1、字符串转化为字节数组，每4个字节转化为一个uint，依次存储到uint数组
/// 2、附加0x80作为最后一个字节
/// 3、在uint数组最后位置记录文件字节长度信息
///
public static uint[] To16Array(byte[] Bytes)
{
uint DataLen = (uint)Bytes.Length;
// 计算FileLen对应的uint长度（要求为16的倍数、预留2个uint、最小为16）
uint ArrayLen = (((DataLen + 8) / 64) + 1) * 16;
uint[] Array = new uint[ArrayLen];
uint ArrayPos = 0;
int pos = 0;
uint ByteCount = 0;
for (ByteCount = 0; ByteCount < DataLen; ByteCount++)
{
// 每4个Byte转化为1个uint
ArrayPos = ByteCount / 4;
pos = (int)(ByteCount % 4) * 8;
Array[ArrayPos] = Array[ArrayPos] | ((uint)Bytes[ByteCount] << pos);
}
// 附加0x80作为最后一个字节，添加到uint数组对应位置
ArrayPos = ByteCount / 4;
pos = (int)(ByteCount % 4) * 8;
Array[ArrayPos] = Array[ArrayPos] | ((uint)0x80 << pos);
// 记录总长度信息
Array[ArrayLen - 2] = (DataLen << 3);
Array[ArrayLen - 1] = (DataLen >> 29);
return Array;
}
///
/// 转化字符串为uint数组，数组长度为16的倍数
///
/// 1、字符串转化为字节数组，每4个字节转化为一个uint，依次存储到uint数组
/// 2、附加0x80作为最后一个字节
/// 3、在uint数组最后位置记录文件字节长度信息
///
public static uint[] To16Array(string data)
{
byte[] datas = System.Text.Encoding.Default.GetBytes(data);
return To16Array(datas);
}
///
/// 转化文件为uint数组，数组长度为16的倍数
///
/// 1、读取文件字节信息，每4个字节转化为一个uint，依次存储到uint数组
/// 2、附加0x80作为最后一个字节
/// 3、在uint数组最后位置记录文件字节长度信息
///
public static uint[] To16Array(FileInfo info)
{
FileStream fs = new FileStream(info.FullName, FileMode.Open);// 读取方式打开，得到流
int SIZE = 1024 * 1024 * 10; // 10M缓存
byte[] datas = new byte[SIZE]; // 要读取的内容会放到这个数组里
int countI = 0;
long offset = 0;
// 计算FileLen对应的uint长度（要求为16的倍数、预留2个uint、最小为16）
uint FileLen = (uint)info.Length;
uint ArrayLen = (((FileLen + 8) / 64) + 1) * 16;
uint[] Array = new uint[ArrayLen];
int pos = 0;
uint ByteCount = 0;
uint ArrayPos = 0;
while (ByteCount < FileLen)
{
if (countI == 0)
{
fs.Seek(offset, SeekOrigin.Begin);// 定位到指定字节
fs.Read(datas, 0, datas.Length);
offset += SIZE;
}
// 每4个Byte转化为1个uint
ArrayPos = ByteCount / 4;
pos = (int)(ByteCount % 4) * 8;
Array[ArrayPos] = Array[ArrayPos] | ((uint)datas[countI] << pos);
ByteCount = ByteCount + 1;
countI++;
if (countI == SIZE) countI = 0;
}
// 附加0x80作为最后一个字节，添加到uint数组对应位置
ArrayPos = ByteCount / 4;
pos = (int)(ByteCount % 4) * 8;
Array[ArrayPos] = Array[ArrayPos] | ((uint)0x80 << pos);
// 记录总长度信息
Array[ArrayLen - 2] = (FileLen << 3);
Array[ArrayLen - 1] = (FileLen >> 29);
fs.Close();
return Array;
}
///
/// 将X数组还原为原有字符串
///
private static String ToNativeStr(uint[] X)
{
List list = new List();
for (int i = 0; i < 8; i++)
{
uint n = X[i];
for (int j = 0; j < 4; j++)
{
byte b = (byte)(n & 0xFF);
list.Add(b);
n = n >> 8;
}
}
byte[] Bytes = list.ToArray();
String Str = System.Text.Encoding.Default.GetString(Bytes);
return Str;
}
private static uint F(uint x, uint y, uint z)
{
return (x & y) | ((~x) & z);
}
private static uint G(uint x, uint y, uint z)
{
return (x & z) | (y & (~z));
}
// 0^0^0 = 0
// 0^0^1 = 1
// 0^1^0 = 1
// 0^1^1 = 0
// 1^0^0 = 1
// 1^0^1 = 0
// 1^1^0 = 0
// 1^1^1 = 1
private static uint H(uint x, uint y, uint z)
{
return (x ^ y ^ z);
}
private static uint I(uint x, uint y, uint z)
{
return (y ^ (x | (~z)));
}
// 循环左移
private static uint RL(uint x, int y)
{
y = y % 32;
return (x << y) | (x >> (32 - y));
}
private static void md5_FF(ref uint a, uint b, uint c, uint d, uint x, int s, uint ac)
{
//uint a1 = a; // 1732584193 4023233417
uint f = F(b, c, d); // 2562383102
a = x + ac + a + f; // 3614090487
a = RL(a, s); // 3042081771
a = a + b;
//md5_FF2(ref a1, b, c, d, x, s, ac);
//if (a != a1) // 2770347892 2770347893
// MessageBox.Show("");
}
private static void md5_FF2(ref uint a, uint b, uint c, uint d, uint x, int s, uint ac)
{
uint f = F(b, c, d); // 2562383102
a = x + ac + a + f; // 3614090487
uint b2 = RL(b, 32 - s); // 333421399
a = a + b2;
a = RL(a, s);
}
private static void md5_GG(ref uint a, uint b, uint c, uint d, uint x, int s, uint ac)
{
uint g = G(b, c, d);
a = x + ac + a + g;
a = RL(a, s);
a = a + b;
}
private static void md5_HH(ref uint a, uint b, uint c, uint d, uint x, int s, uint ac)
{
uint h = H(b, c, d);
a = x + ac + a + h;
a = RL(a, s);
a = a + b;
}
//uint a = 350508294;
//uint b = 4283343851;
//uint c = 1846584438;
//uint d = 1917254355;
private static void md5_II(ref uint a, uint b, uint c, uint d, uint x, int s, uint ac)
{
//uint xa = x + a; // 806551938
uint i = I(b, c, d);// 2448360345
a = x + ac + a + i; // 2911426732
a = RL(a, s); // 362131739
a = a + b;
}
private static string RHex(uint n)
{
string S = Convert.ToString(n, 16);
return ReOrder(S);
}
// 16进制串重排序 67452301 -> 01234567
private static string ReOrder(String S)
{
string T = "";
for (int i = S.Length - 2; i >= 0; i = i - 2)
{
if (i == -1) T = T + "0" + S[i + 1];
else T = T + "" + S[i] + S[i + 1];
}
return T;
}
///
/// 对长度为16倍数的uint数组，执行md5数据摘要，输出md5信息
///
public static string calculate(uint[] x)
{
//uint time1 = DateTime.Now.Ticks;
// 7 12 17 22
// 5 9 14 20
// 4 11 16 23
// 6 10 15 21
const int S11 = 7;
const int S12 = 12;
const int S13 = 17;
const int S14 = 22;
const int S21 = 5;
const int S22 = 9;
const int S23 = 14;
const int S24 = 20;
const int S31 = 4;
const int S32 = 11;
const int S33 = 16;
const int S34 = 23;
const int S41 = 6;
const int S42 = 10;
const int S43 = 15;
const int S44 = 21;
uint a = 0x67452301;
uint b = 0xEFCDAB89;
uint c = 0x98BADCFE;
uint d = 0x10325476;
for (int k = 0; k < x.Length; k += 16)
{
uint AA = a;
uint BB = b;
uint CC = c;
uint DD = d;
md5_FF(ref a, b, c, d, x[k + 0], S11, 0xD76AA478); // 3604027302
md5_FF(ref d, a, b, c, x[k + 1], S12, 0xE8C7B756); // 877880356
md5_FF(ref c, d, a, b, x[k + 2], S13, 0x242070DB); // 2562383102
md5_FF(ref b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
md5_FF(ref a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
md5_FF(ref d, a, b, c, x[k + 5], S12, 0x4787C62A);
md5_FF(ref c, d, a, b, x[k + 6], S13, 0xA8304613);
md5_FF(ref b, c, d, a, x[k + 7], S14, 0xFD469501);
md5_FF(ref a, b, c, d, x[k + 8], S11, 0x698098D8);
md5_FF(ref d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
md5_FF(ref c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
md5_FF(ref b, c, d, a, x[k + 11], S14, 0x895CD7BE);
md5_FF(ref a, b, c, d, x[k + 12], S11, 0x6B901122);
md5_FF(ref d, a, b, c, x[k + 13], S12, 0xFD987193);
md5_FF(ref c, d, a, b, x[k + 14], S13, 0xA679438E);
md5_FF(ref b, c, d, a, x[k + 15], S14, 0x49B40821); //3526238649
md5_GG(ref a, b, c, d, x[k + 1], S21, 0xF61E2562);
md5_GG(ref d, a, b, c, x[k + 6], S22, 0xC040B340); //1572812400
md5_GG(ref c, d, a, b, x[k + 11], S23, 0x265E5A51);
md5_GG(ref b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
md5_GG(ref a, b, c, d, x[k + 5], S21, 0xD62F105D);
md5_GG(ref d, a, b, c, x[k + 10], S22, 0x2441453);
md5_GG(ref c, d, a, b, x[k + 15], S23, 0xD8A1E681);
md5_GG(ref b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
md5_GG(ref a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
md5_GG(ref d, a, b, c, x[k + 14], S22, 0xC33707D6);
md5_GG(ref c, d, a, b, x[k + 3], S23, 0xF4D50D87);
md5_GG(ref b, c, d, a, x[k + 8], S24, 0x455A14ED);
md5_GG(ref a, b, c, d, x[k + 13], S21, 0xA9E3E905);
md5_GG(ref d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
md5_GG(ref c, d, a, b, x[k + 7], S23, 0x676F02D9);
md5_GG(ref b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
md5_HH(ref a, b, c, d, x[k + 5], S31, 0xFFFA3942); // 3750198684 2314002400 1089690627 990001115 0 4 -> 2749600077
md5_HH(ref d, a, b, c, x[k + 8], S32, 0x8771F681); // 990001115
md5_HH(ref c, d, a, b, x[k + 11], S33, 0x6D9D6122); // 1089690627
md5_HH(ref b, c, d, a, x[k + 14], S34, 0xFDE5380C); // 2314002400
md5_HH(ref a, b, c, d, x[k + 1], S31, 0xA4BEEA44); // 555633090
md5_HH(ref d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
md5_HH(ref c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
md5_HH(ref b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
md5_HH(ref a, b, c, d, x[k + 13], S31, 0x289B7EC6);
md5_HH(ref d, a, b, c, x[k + 0], S32, 0xEAA127FA);
md5_HH(ref c, d, a, b, x[k + 3], S33, 0xD4EF3085);
md5_HH(ref b, c, d, a, x[k + 6], S34, 0x4881D05);
md5_HH(ref a, b, c, d, x[k + 9], S31, 0xD9D4D039);
md5_HH(ref d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
md5_HH(ref c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
md5_HH(ref b, c, d, a, x[k + 2], S34, 0xC4AC5665); // 1444303940
md5_II(ref a, b, c, d, x[k + 0], S41, 0xF4292244); // 808311156
md5_II(ref d, a, b, c, x[k + 7], S42, 0x432AFF97);
md5_II(ref c, d, a, b, x[k + 14], S43, 0xAB9423A7);
md5_II(ref b, c, d, a, x[k + 5], S44, 0xFC93A039);
md5_II(ref a, b, c, d, x[k + 12], S41, 0x655B59C3);
md5_II(ref d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
md5_II(ref c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
md5_II(ref b, c, d, a, x[k + 1], S44, 0x85845DD1);
md5_II(ref a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
md5_II(ref d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
md5_II(ref c, d, a, b, x[k + 6], S43, 0xA3014314);
md5_II(ref b, c, d, a, x[k + 13], S44, 0x4E0811A1);
md5_II(ref a, b, c, d, x[k + 4], S41, 0xF7537E82);
md5_II(ref d, a, b, c, x[k + 11], S42, 0xBD3AF235);
md5_II(ref c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
md5_II(ref b, c, d, a, x[k + 9], S44, 0xEB86D391); // 4120542881
// 350508294 4283343851 1846584438 1917254355
a = a + AA; //3844921825
b = b + BB;
c = c + CC;
d = d + DD;
}
string MD5 = RHex(a) + RHex(b) + RHex(c) + RHex(d);
//uint time2 = DateTime.Now.Ticks;
//MessageBox.Show("MD5计算耗时：" + ((time2 - time1) / 10000000f) + "秒");
return MD5;
}
#endregion
}
}
