C#加密方法汇总-阿里云开发者社区

代码

// 须添加对System.Web的引用

using System.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( string source)

{

     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( string source)

{

     return FormsAuthentication.HashPasswordForStoringInConfigFile(source, " MD5 " );;

}

// 须添加对System.Web的引用
using System.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( string source)
{
     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( string source)
{
     return FormsAuthentication.HashPasswordForStoringInConfigFile(source, " MD5 " );;
}

//方法二(可逆加密解密)：

using System.Security.Cryptography;

public string Encode( string data)

{

     byte [] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);

     byte [] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

    DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

     int i = cryptoProvider.KeySize;

    MemoryStream ms = new MemoryStream();

    CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);

    StreamWriter sw = new StreamWriter(cst);

    sw.Write(data);

    sw.Flush();

    cst.FlushFinalBlock();

    sw.Flush();

     return Convert.ToBase64String(ms.GetBuffer(), 0 , ( int )ms.Length);

}

public string Decode( string data)

{

     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 = new DESCryptoServiceProvider();

    MemoryStream ms = new MemoryStream(byEnc);

    CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);

    StreamReader sr = new StreamReader(cst);

     return sr.ReadToEnd();

}

using System.Security.Cryptography;

public string Encode( string data)
{
     byte [] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
     byte [] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);

    DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
     int i = cryptoProvider.KeySize;
    MemoryStream ms = new MemoryStream();
    CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);

    StreamWriter sw = new StreamWriter(cst);
    sw.Write(data);
    sw.Flush();
    cst.FlushFinalBlock();
    sw.Flush();
     return Convert.ToBase64String(ms.GetBuffer(), 0 , ( int )ms.Length);

}

public string Decode( string data)
{
     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 = new DESCryptoServiceProvider();
    MemoryStream ms = new MemoryStream(byEnc);
    CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
    StreamReader sr = new StreamReader(cst);
     return sr.ReadToEnd();
}

//方法三(MD5不可逆)：

using System.Security.Cryptography;

// MD5不可逆加密

// 32位加密

public string GetMD5_32( string s, string _input_charset)

{

    MD5 md5 = new MD5CryptoServiceProvider();

     byte [] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));

    StringBuilder sb = new StringBuilder( 32 );

     for ( int i = 0 ; i < t.Length; i ++ )

    {

        sb.Append(t[i].ToString( " x " ).PadLeft( 2 , ' 0 ' ));

    }

     return sb.ToString();

}

// 16位加密

public static string GetMd5_16( string ConvertString)

{

    MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();

     string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4 , 8 );

    t2 = t2.Replace( " - " , "" );

     return t2;

}

using System.Security.Cryptography;

// MD5不可逆加密

// 32位加密

public string GetMD5_32( string s, string _input_charset)
{
    MD5 md5 = new MD5CryptoServiceProvider();
     byte [] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
    StringBuilder sb = new StringBuilder( 32 );
     for ( int i = 0 ; i < t.Length; i ++ )
    {
        sb.Append(t[i].ToString( " x " ).PadLeft( 2 , ' 0 ' ));
    }
     return sb.ToString();
}

// 16位加密
public static string GetMd5_16( string ConvertString)
{
    MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
     string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4 , 8 );
    t2 = t2.Replace( " - " , "" );
     return t2;
}

//方法四(对称加密)：

using System.IO;

using System.Security.Cryptography;

private SymmetricAlgorithm mobjCryptoService;

private string Key;

/// <summary>

/// 对称加密类的构造函数

/// </summary>

public SymmetricMethod()

{

    mobjCryptoService = new RijndaelManaged();

    Key = " Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7 " ;

}

/// <summary>

/// 获得密钥

/// </summary>

/// <returns> 密钥 </returns>

private byte [] GetLegalKey()

{

     string sTemp = Key;

    mobjCryptoService.GenerateKey();

     byte [] bytTemp = mobjCryptoService.Key;

     int KeyLength = bytTemp.Length;

     if (sTemp.Length > KeyLength)

        sTemp = sTemp.Substring( 0 , KeyLength);

     else if (sTemp.Length < KeyLength)

        sTemp = sTemp.PadRight(KeyLength, ' ' );

     return ASCIIEncoding.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;

     int IVLength = bytTemp.Length;

     if (sTemp.Length > IVLength)

        sTemp = sTemp.Substring( 0 , IVLength);

     else if (sTemp.Length < IVLength)

        sTemp = sTemp.PadRight(IVLength, ' ' );

     return ASCIIEncoding.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( string Source)

{

     byte [] bytIn = UTF8Encoding.UTF8.GetBytes(Source);

    MemoryStream ms = new MemoryStream();

    mobjCryptoService.Key = GetLegalKey();

    mobjCryptoService.IV = GetLegalIV();

    ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();

    CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);

    cs.Write(bytIn, 0 , bytIn.Length);

    cs.FlushFinalBlock();

    ms.Close();

     byte [] bytOut = ms.ToArray();

     return Convert.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( string Source)

{

     byte [] bytIn = Convert.FromBase64String(Source);

    MemoryStream ms = new MemoryStream(bytIn, 0 , bytIn.Length);

    mobjCryptoService.Key = GetLegalKey();

    mobjCryptoService.IV = GetLegalIV();

    ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();

    CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);

    StreamReader sr = new StreamReader(cs);

     return sr.ReadToEnd();

}

using System.IO;
using System.Security.Cryptography;

private SymmetricAlgorithm mobjCryptoService;
private string Key;
/// <summary>
/// 对称加密类的构造函数
/// </summary>
public SymmetricMethod()
{
    mobjCryptoService = new RijndaelManaged();
    Key = " Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7 " ;
}
/// <summary>
/// 获得密钥
/// </summary>
/// <returns> 密钥 </returns>
private byte [] GetLegalKey()
{
     string sTemp = Key;
    mobjCryptoService.GenerateKey();
     byte [] bytTemp = mobjCryptoService.Key;
     int KeyLength = bytTemp.Length;
     if (sTemp.Length > KeyLength)
        sTemp = sTemp.Substring( 0 , KeyLength);
     else if (sTemp.Length < KeyLength)
        sTemp = sTemp.PadRight(KeyLength, ' ' );
     return ASCIIEncoding.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;
     int IVLength = bytTemp.Length;
     if (sTemp.Length > IVLength)
        sTemp = sTemp.Substring( 0 , IVLength);
     else if (sTemp.Length < IVLength)
        sTemp = sTemp.PadRight(IVLength, ' ' );
     return ASCIIEncoding.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( string Source)
{
     byte [] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
    MemoryStream ms = new MemoryStream();
    mobjCryptoService.Key = GetLegalKey();
    mobjCryptoService.IV = GetLegalIV();
    ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
    CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
    cs.Write(bytIn, 0 , bytIn.Length);
    cs.FlushFinalBlock();
    ms.Close();
     byte [] bytOut = ms.ToArray();
     return Convert.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( string Source)
{
     byte [] bytIn = Convert.FromBase64String(Source);
    MemoryStream ms = new MemoryStream(bytIn, 0 , bytIn.Length);
    mobjCryptoService.Key = GetLegalKey();
    mobjCryptoService.IV = GetLegalIV();
    ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
    CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
    StreamReader sr = new StreamReader(cs);
     return sr.ReadToEnd();
}

//方法五：

using System.IO;

using System.Security.Cryptography;

using System.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, string encryptKey)

{

     try

    {

         byte [] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring( 0 , 8 ));

         byte [] rgbIV = Keys;

         byte [] inputByteArray = Encoding.UTF8.GetBytes(encryptString);

        DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();

        MemoryStream mStream = new MemoryStream();

        CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

        cStream.Write(inputByteArray, 0 , inputByteArray.Length);

        cStream.FlushFinalBlock();

         return Convert.ToBase64String(mStream.ToArray());

    }

     catch

    {

         return encryptString;

    }

}

/**//**//**/ /// <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, string decryptKey)

{

     try

    {

         byte [] rgbKey = Encoding.UTF8.GetBytes(decryptKey);

         byte [] rgbIV = Keys;

         byte [] inputByteArray = Convert.FromBase64String(decryptString);

        DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();

        MemoryStream mStream = new MemoryStream();

        CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);

        cStream.Write(inputByteArray, 0 , inputByteArray.Length);

        cStream.FlushFinalBlock();

         return Encoding.UTF8.GetString(mStream.ToArray());

    }

     catch

    {

         return decryptString;

    }

}

using System.IO;
using System.Security.Cryptography;
using System.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, string encryptKey)
{
     try
    {
         byte [] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring( 0 , 8 ));
         byte [] rgbIV = Keys;
         byte [] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
        DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
        MemoryStream mStream = new MemoryStream();
        CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
        cStream.Write(inputByteArray, 0 , inputByteArray.Length);
        cStream.FlushFinalBlock();
         return Convert.ToBase64String(mStream.ToArray());
    }
     catch
    {
         return encryptString;
    }
}

/**//**//**/ /// <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, string decryptKey)
{
     try
    {
         byte [] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
         byte [] rgbIV = Keys;
         byte [] inputByteArray = Convert.FromBase64String(decryptString);
        DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
        MemoryStream mStream = new MemoryStream();
        CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
        cStream.Write(inputByteArray, 0 , inputByteArray.Length);
        cStream.FlushFinalBlock();
         return Encoding.UTF8.GetString(mStream.ToArray());
    }
     catch
    {
         return decryptString;
    }
}

//方法六(文件加密)：

using System.IO;

using System.Security.Cryptography;

using System.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 = new FileStream(inName, FileMode.Open, FileAccess.Read);

    FileStream fout = new FileStream(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 = new DESCryptoServiceProvider();

    CryptoStream encStream = new CryptoStream(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 = new FileStream(inName, FileMode.Open, FileAccess.Read);

    FileStream fout = new FileStream(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 = new DESCryptoServiceProvider();

    CryptoStream encStream = new CryptoStream(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();

}

using System.IO;
using System.Security.Cryptography;
using System.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 = new FileStream(inName, FileMode.Open, FileAccess.Read);
    FileStream fout = new FileStream(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 = new DESCryptoServiceProvider();
    CryptoStream encStream = new CryptoStream(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 = new FileStream(inName, FileMode.Open, FileAccess.Read);
    FileStream fout = new FileStream(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 = new DESCryptoServiceProvider();
    CryptoStream encStream = new CryptoStream(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();
}

C#加密方法汇总

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