C#加密方法汇总

//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();
}