c#加密算法大全Word文件下载.docx

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c#加密算法大全Word文件下载.docx

publicstringSHA1(stringsource) 

returnFormsAuthentication.HashPasswordForStoringInConfigFile(source,"

SHA1"

);

///MD5加密字符串 

publicstringMD5(stringsource) 

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();

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

publicstringDecode(stringdata) 

byte[]byEnc;

try 

byEnc=Convert.FromBase64String(data);

catch 

returnnull;

MemoryStreamms=newMemoryStream(byEnc);

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

StreamReadersr=newStreamReader(cst);

returnsr.ReadToEnd();

方法三(MD5不可逆):

//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<

t.Length;

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;

privateSymmetricAlgorithmmobjCryptoService;

privatestringKey;

///对称加密类的构造函数 

publicSymmetricMethod() 

mobjCryptoService=newRijndaelManaged();

Key="

Guz(%&

hj7x89H$yuBI0456FtmaT5&

fvHUFCy76*h%(HilJ$lhj!

y6&

(*jkP87jH7"

///获得密钥 

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);

///获得初始向量IV 

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;

IVLength) 

sTemp=sTemp.Substring(0,IVLength);

sTemp=sTemp.PadRight(IVLength,'

///加密方法 

Source"

待加密的串<

经过加密的串<

publicstringEncrypto(stringSource) 

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

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);

///解密方法 

待解密的串<

经过解密的串<

publicstringDecrypto(stringSource) 

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

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

ICryptoTransformencrypto=mobjCryptoService.CreateDecryptor();

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

StreamReadersr=newStreamReader(cs);

方法五:

usingSystem.Text;

//默认密钥向量 

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

///DES加密字符串 

encryptString"

待加密的字符串<

encryptKey"

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) 

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());

returnencryptString;

///DES解密字符串 

decryptString"

待解密的字符串<

decryptKey"

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) 

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

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

DESCryptoServiceProviderDCSP=newDESCryptoServiceProvider();

CryptoStreamcStream=newCryptoStream(mStream,DCSP.CreateDecryptor(rgbKey,rgbIV),CryptoStreamMode.Write);

returnEncoding.UTF8.GetString(mStream.ToArray());

returndecryptString;

方法六(文件加密):

//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,thenencryptandwritet

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