基于.net的加密汇总（1）

引用C#加密汇总

方法一：

//须添加对System.Web的引用
usingSystem.Web.Security;
...
/// <summary>
/// SHA1加密字符串
/// </summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
public string SHA1(stringsource)
{
    return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1");
}
/// <summary>
/// MD5加密字符串
/// </summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
public string MD5(stringsource)
{
    return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");;
}

 

方法二(可逆加密解密)：

usingSystem.Security.Cryptography;
...
public string Encode(stringdata)
{
    byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
    byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
    DESCryptoServiceProvider cryptoProvider = newDESCryptoServiceProvider();
    inti = cryptoProvider.KeySize;
    MemoryStream ms = newMemoryStream();
    CryptoStream cst = newCryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);
    StreamWriter sw = newStreamWriter(cst);
    sw.Write(data);
    sw.Flush();
    cst.FlushFinalBlock();
    sw.Flush();
    return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
}
public string Decode(stringdata)
{
    byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
    byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
    byte[] byEnc;
    try
    {
        byEnc = Convert.FromBase64String(data);
    }
    catch
    {
        return null;
    }
    DESCryptoServiceProvider cryptoProvider = newDESCryptoServiceProvider();
    MemoryStream ms = newMemoryStream(byEnc);
    CryptoStream cst = newCryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
    StreamReader sr = newStreamReader(cst);
    returnsr.ReadToEnd();
}

 

方法三(MD5不可逆)：

usingSystem.Security.Cryptography;
...
//MD5不可逆加密
//32位加密
public string GetMD5_32(string s, string_input_charset)
{
    MD5 md5 = newMD5CryptoServiceProvider();
    byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
    StringBuilder sb = newStringBuilder(32);
    for (inti = 0; i < t.Length; i++)
    {
        sb.Append(t[i].ToString("x").PadLeft(2, '0'));
    }
    returnsb.ToString();
}
//16位加密
public static string GetMd5_16(stringConvertString)
{
    MD5CryptoServiceProvider md5 = newMD5CryptoServiceProvider();
    stringt2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
    t2 = t2.Replace("-", "");
    returnt2;
}

 

方法四(对称加密)：

usingSystem.IO;
usingSystem.Security.Cryptography;
...
privateSymmetricAlgorithm mobjCryptoService;
private stringKey;
/// <summary>
/// 对称加密类的构造函数
/// </summary>
publicSymmetricMethod()
{
    mobjCryptoService = newRijndaelManaged();
    Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
}
/// <summary>
/// 获得密钥
/// </summary>
/// <returns>密钥</returns>
private byte[] GetLegalKey()
{
    stringsTemp = Key;
    mobjCryptoService.GenerateKey();
    byte[] bytTemp = mobjCryptoService.Key;
    intKeyLength = bytTemp.Length;
    if(sTemp.Length > KeyLength)
        sTemp = sTemp.Substring(0, KeyLength);
    else if(sTemp.Length < KeyLength)
        sTemp = sTemp.PadRight(KeyLength, ' ');
    returnASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 获得初始向量IV
/// </summary>
/// <returns>初试向量IV</returns>
private byte[] GetLegalIV()
{
    string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
    mobjCryptoService.GenerateIV();
    byte[] bytTemp = mobjCryptoService.IV;
    intIVLength = bytTemp.Length;
    if(sTemp.Length > IVLength)
        sTemp = sTemp.Substring(0, IVLength);
    else if(sTemp.Length < IVLength)
        sTemp = sTemp.PadRight(IVLength, ' ');
    returnASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 加密方法
/// </summary>
/// <param name="Source">待加密的串</param>
/// <returns>经过加密的串</returns>
public string Encrypto(stringSource)
{
    byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
    MemoryStream ms = newMemoryStream();
    mobjCryptoService.Key = GetLegalKey();
    mobjCryptoService.IV = GetLegalIV();
    ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
    CryptoStream cs = newCryptoStream(ms, encrypto, CryptoStreamMode.Write);
    cs.Write(bytIn, 0, bytIn.Length);
    cs.FlushFinalBlock();
    ms.Close();
    byte[] bytOut = ms.ToArray();
    returnConvert.ToBase64String(bytOut);
}
/// <summary>
/// 解密方法
/// </summary>
/// <param name="Source">待解密的串</param>
/// <returns>经过解密的串</returns>
public string Decrypto(stringSource)
{
    byte[] bytIn = Convert.FromBase64String(Source);
    MemoryStream ms = newMemoryStream(bytIn, 0, bytIn.Length);
    mobjCryptoService.Key = GetLegalKey();
    mobjCryptoService.IV = GetLegalIV();
    ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
    CryptoStream cs = newCryptoStream(ms, encrypto, CryptoStreamMode.Read);
    StreamReader sr = newStreamReader(cs);
    returnsr.ReadToEnd();
}

 

方法五：

usingSystem.IO;
usingSystem.Security.Cryptography;
usingSystem.Text;
...
//默认密钥向量
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
/**//**//**//// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public static string EncryptDES(string encryptString, stringencryptKey)
{
    try
    {
        byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
        byte[] rgbIV = Keys;
        byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
        DESCryptoServiceProvider dCSP = newDESCryptoServiceProvider();
        MemoryStream mStream = newMemoryStream();
        CryptoStream cStream = newCryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
        cStream.Write(inputByteArray, 0, inputByteArray.Length);
        cStream.FlushFinalBlock();
        returnConvert.ToBase64String(mStream.ToArray());
    }
    catch
    {
        returnencryptString;
    }
}
/**//**//**//// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, stringdecryptKey)
{
    try
    {
        byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
        byte[] rgbIV = Keys;
        byte[] inputByteArray = Convert.FromBase64String(decryptString);
        DESCryptoServiceProvider DCSP = newDESCryptoServiceProvider();
        MemoryStream mStream = newMemoryStream();
        CryptoStream cStream = newCryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
        cStream.Write(inputByteArray, 0, inputByteArray.Length);
        cStream.FlushFinalBlock();
        returnEncoding.UTF8.GetString(mStream.ToArray());
    }
    catch
    {
        returndecryptString;
    }
}

 

方法六(文件加密)：

using System.IO;
usingSystem.Security.Cryptography;
usingSystem.Text;
...
//加密文件
private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)
{
    //Create the file streams to handle the input and output files.
    FileStream fin = newFileStream(inName, FileMode.Open, FileAccess.Read);
    FileStream fout = newFileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
    fout.SetLength(0);
    //Create variables to help with read and write.
    byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
    long rdlen = 0;              //This is the total number of bytes written.
    long totlen = fin.Length;    //This is the total length of the input file.
    int len;                     //This is the number of bytes to be written at a time.
    DES des = newDESCryptoServiceProvider();
    CryptoStream encStream = newCryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);
    //Read from the input file, then encrypt and write to the output file.
    while(rdlen < totlen)
    {
        len = fin.Read(bin, 0, 100);
        encStream.Write(bin, 0, len);
        rdlen = rdlen + len;
    }
    encStream.Close();
    fout.Close();
    fin.Close();
}
//解密文件
private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV)
{
    //Create the file streams to handle the input and output files.
    FileStream fin = newFileStream(inName, FileMode.Open, FileAccess.Read);
    FileStream fout = newFileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
    fout.SetLength(0);
    //Create variables to help with read and write.
    byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
    long rdlen = 0;              //This is the total number of bytes written.
    long totlen = fin.Length;    //This is the total length of the input file.
    int len;                     //This is the number of bytes to be written at a time.
    DES des = newDESCryptoServiceProvider();
    CryptoStream encStream = newCryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);
    //Read from the input file, then encrypt and write to the output file.
    while(rdlen < totlen)
    {
        len = fin.Read(bin, 0, 100);
        encStream.Write(bin, 0, len);
        rdlen = rdlen + len;
    }
    encStream.Close();
    fout.Close();
    fin.Close();