C#加密算法汇总.docx

C#加密算法汇总.docx

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C#加密算法汇总

方法一：

//须添加对System.Web的引用

usingSystem.Web.Security;

...

///

///源字符串

///加密后的字符串

publicstringSHA1（stringsource）

{

returnFormsAuthentication.HashPasswordForStoringInConfigFile（source,"SHA1"）;

}

///

///源字符串

///加密后的字符串

publicstringMD5（stringsource）

{

returnFormsAuthentication.HashPasswordForStoringInConfigFile（source,"MD5"）;;

}

方法二（可逆加密解密）：

usingSystem.Security.Cryptography;

...

publicstringEncode（stringdata）

{

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

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

DESCryptoServiceProvidercryptoProvider=newDESCryptoServiceProvider（）;

inti=cryptoProvider.KeySize;

MemoryStreamms=newMemoryStream（）;

CryptoStreamcst=newCryptoStream（ms,cryptoProvider.CreateEncryptor（byKey,byIV）,CryptoStreamMode.Write）;

StreamWritersw=newStreamWriter（cst）;

sw.Write（data）;

sw.Flush（）;

cst.FlushFinalBlock（）;

sw.Flush（）;

returnConvert.ToBase64String（ms.GetBuffer（）,0,（int）ms.Length）;

}

publicstringDecode（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

{

returnnull;

}

DESCryptoServiceProvidercryptoProvider=newDESCryptoServiceProvider（）;

MemoryStreamms=newMemoryStream（byEnc）;

CryptoStreamcst=newCryptoStream（ms,cryptoProvider.CreateDecryptor（byKey,byIV）,CryptoStreamMode.Read）;

StreamReadersr=newStreamReader（cst）;

returnsr.ReadToEnd（）;

}

方法三（MD5不可逆）：

usingSystem.Security.Cryptography;

...

//MD5不可逆加密

//32位加密

publicstringGetMD5_32（strings,string_input_charset）

{

MD5md5=newMD5CryptoServiceProvider（）;

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

StringBuildersb=newStringBuilder（32）;

for（inti=0;i

{

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

}

returnsb.ToString（）;

}

//16位加密

publicstaticstringGetMd5_16（stringConvertString）

{

MD5CryptoServiceProvidermd5=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;

...

privateSymmetricAlgorithmmobjCryptoService;

privatestringKey;

///

publicSymmetricMethod（）

{

mobjCryptoService=newRijndaelManaged（）;

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

y6&（*jkP87jH7";

}

///

///密钥

privatebyte[]GetLegalKey（）

{

stringsTemp=Key;

mobjCryptoService.GenerateKey（）;

byte[]bytTemp=mobjCryptoService.Key;

intKeyLength=bytTemp.Length;

if（sTemp.Length>KeyLength）

sTemp=sTemp.Substring（0,KeyLength）;

elseif（sTemp.Length

sTemp=sTemp.PadRight（KeyLength,''）;

returnASCIIEncoding.ASCII.GetBytes（sTemp）;

}

///

///初试向量IV

privatebyte[]GetLegalIV（）

{

stringsTemp="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）;

elseif（sTemp.Length

sTemp=sTemp.PadRight（IVLength,''）;

returnASCIIEncoding.ASCII.GetBytes（sTemp）;

}

///

///待加密的串

///经过加密的串

publicstringEncrypto（stringSource）

{

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

MemoryStreamms=newMemoryStream（）;

mobjCryptoService.Key=GetLegalKey（）;

mobjCryptoService.IV=GetLegalIV（）;

ICryptoTransformencrypto=mobjCryptoService.CreateEncryptor（）;

CryptoStreamcs=newCryptoStream（ms,encrypto,CryptoStreamMode.Write）;

cs.Write（bytIn,0,bytIn.Length）;

cs.FlushFinalBlock（）;

ms.Close（）;

byte[]bytOut=ms.ToArray（）;

returnConvert.ToBase64String（bytOut）;

}

///

///待解密的串

///经过解密的串

publicstringDecrypto（stringSource）

{

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

MemoryStreamms=newMemoryStream（bytIn,0,bytIn.Length）;

mobjCryptoService.Key=GetLegalKey（）;

mobjCryptoService.IV=GetLegalIV（）;

ICryptoTransformencrypto=mobjCryptoService.CreateDecryptor（）;

CryptoStreamcs=newCryptoStream（ms,encrypto,CryptoStreamMode.Read）;

StreamReadersr=newStreamReader（cs）;

returnsr.ReadToEnd（）;

}

方法五：

usingSystem.IO;

usingSystem.Security.Cryptography;

usingSystem.Text;

...

//默认密钥向量

privatestaticbyte[]Keys={0x12,0x34,0x56,0x78,0x90,0xAB,0xCD,0xEF};

///

///待加密的字符串

///加密密钥,要求为8位

///加密成功返回加密后的字符串，失败返回源串

publicstaticstringEncryptDES（stringencryptString,stringencryptKey）

{

try

{

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

byte[]rgbIV=Keys;

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

DESCryptoServiceProviderdCSP=newDESCryptoServiceProvider（）;

MemoryStreammStream=newMemoryStream（）;

CryptoStreamcStream=newCryptoStream（mStream,dCSP.CreateEncryptor（rgbKey,rgbIV）,CryptoStreamMode.Write）;

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

cStream.FlushFinalBlock（）;

returnConvert.ToBase64String（mStream.ToArray（））;

}

catch

{

returnencryptString;

}

}

///

///待解密的字符串

///解密密钥,要求为8位,和加密密钥相同

///解密成功返回解密后的字符串，失败返源串

publicstaticstringDecryptDES（stringdecryptString,stringdecryptKey）

{

try

{

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

byte[]rgbIV=Keys;

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

DESCryptoServiceProviderDCSP=newDESCryptoServiceProvider（）;

MemoryStreammStream=newMemoryStream（）;

CryptoStreamcStream=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）：

usingSystem.IO;

usingSystem.Security.Cryptography;

usingSystem.Text;

...

//加密文件

privatestaticvoidEncryptData（StringinName,StringoutName,byte[]desKey,byte[]desIV）

{

//Createthefilestreamstohandletheinputandoutputfiles.

FileStreamfin=newFileStream（inName,FileMode.Open,FileAccess.Read）;

FileStreamfout=newFileStream（outName,FileMode.OpenOrCreate,FileAccess.Write）;

fout.SetLength（0）;

//Createvariablestohelpwithreadandwrite.

byte[]bin=newbyte[100];//Thisisintermediatestoragefortheencryption.

longrdlen=0;//Thisisthetotalnumberofbyteswritten.

longtotlen=fin.Length;//Thisisthetotallengthoftheinputfile.

intlen;//Thisisthenumberofbytestobewrittenatatime.

DESdes=newDESCryptoServiceProvider（）;

CryptoStreamencStream=newCryptoStream（fout,des.CreateEncryptor（desKey,desIV）,CryptoStreamMode.Write）;

//Readfromtheinputfile,thenencryptandwritetotheoutputfile.

while（rdlen

{

len=fin.Read（bin,0,100）;

encStream.Write（bin,0,len）;

rdlen=rdlen+len;

}

encStream.Close（）;

fout.Close（）;

fin.Close（）;

}

//解密文件

privatestaticvoidDecryptData（StringinName,StringoutName,byte[]desKey,byte[]desIV）

{

//Createthefilestreamstohandletheinputandoutputfiles.

FileStreamfin=newFileStream（inName,FileMode.Open,FileAccess.Read）;

FileStreamfout=newFileStream（outName,FileMode.OpenOrCreate,FileAccess.Write）;

fout.SetLength（0）;

//Createvariablestohelpwithreadandwrite.

byte[]bin=newbyte[100];//Thisisintermediatestoragefortheencryption.

longrdlen=0;//Thisisthetotalnumberofbyteswritten.

longtotlen=fin.Length;//Thisisthetotallengthoftheinputfile.

intlen;//Thisisthenumberofbytestobewrittenatatime.

DESdes=newDESCryptoServiceProvider（）;

CryptoStreamencStream=newCryptoStream（fout,des.CreateDecryptor（desKey,desIV）,CryptoStreamMode.Write）;

//Readfromtheinputfile,thenencryptandwritetotheoutputfile.

while（rdlen

{

len=fin.Read（bin,0,100）;

encStream.Write（bin,0,len）;

rdlen=rdlen+len;

}

encStream.Close（）;

fout.Close（）;

fin.Close（）;

}

usingSystem;

usingSystem.Security.Cryptography;//这个是处理文字编码的前提

usingSystem.Text;

usingSystem.IO;

///

///明文

///密钥

///向量

///密文

publicstringDESEncrypt（stringstrPlain,stringstrDESKey,stringstrDESIV）

{

//把密钥转换成字节数组

byte[]bytesDESKey=ASCIIEncoding.ASCII.GetBytes（strDESKey