c#加密汇总

 

//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

 {  yEnc = Convert.FromBase64String(data);} 

 catch

{ 

return null; }

DESCryptoServiceProvider cryptoProvider = ne  DESCryptoServiceProvider();M  ryStream ms = ne  MemoryStream(byEnc);C  toStream cs  = ne  CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);S  amReader sr = ne  StreamReader(cst);r  r  r.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();

}