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

C#加密算法汇总

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01

方法一：

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//须添加对System.Web的引用

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usingSystem.Web.Security;

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...

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///

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///源字符串

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///加密后的字符串

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publicstringSHA1（stringsource）

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{

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returnFormsAuthentication.HashPasswordForStoringInConfigFile（source,"SHA1"）;

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}

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///

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///源字符串

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///加密后的字符串

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publicstringMD5（stringsource）

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{

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

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}

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01

方法二（可逆加密解密）：

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usingSystem.Security.Cryptography;

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...

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publicstringEncode（stringdata）

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{

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

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

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DESCryptoServiceProvidercryptoProvider=newDESCryptoServiceProvider（）;

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inti=cryptoProvider.KeySize;

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MemoryStreamms=newMemoryStream（）;

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

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StreamWritersw=newStreamWriter（cst）;

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sw.Write（data）;

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sw.Flush（）;

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cst.FlushFinalBlock（）;

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sw.Flush（）;

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

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}

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publicstringDecode（stringdata）

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{

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

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

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byte[]byEnc;

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try

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{

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byEnc=Convert.FromBase64String（data）;

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}

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catch

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{

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returnnull;

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}

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DESCryptoServiceProvidercryptoProvider=newDESCryptoServiceProvider（）;

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MemoryStreamms=newMemoryStream（byEnc）;

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

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StreamReadersr=newStreamReader（cst）;

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returnsr.ReadToEnd（）;

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}

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01

方法三（MD5不可逆）：

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usingSystem.Security.Cryptography;

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...

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//MD5不可逆加密

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//32位加密

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publicstringGetMD5_32（strings,string_input_charset）

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{

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MD5md5=newMD5CryptoServiceProvider（）;

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

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StringBuildersb=newStringBuilder（32）;

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for（inti=0;i

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{

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

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}

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returnsb.ToString（）;

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}

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//16位加密

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publicstaticstringGetMd5_16（stringConvertString）

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{

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MD5CryptoServiceProvidermd5=newMD5CryptoServiceProvider（）;

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stringt2=BitConverter.ToString（md5.ComputeHash（UTF8Encoding.Default.GetBytes（ConvertString））,4,8）;

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t2=t2.Replace（"-",""）;

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returnt2;

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}

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01

方法四（对称加密）：

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usingSystem.IO;

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usingSystem.Security.Cryptography;

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...

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privateSymmetricAlgorithmmobjCryptoService;

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privatestringKey;

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///

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publicSymmetricMethod（）

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{

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mobjCryptoService=newRijndaelManaged（）;

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

y6&（*jkP87jH7";

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}

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///

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///密钥

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privatebyte[]GetLegalKey（）

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{

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stringsTemp=Key;

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mobjCryptoService.GenerateKey（）;

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byte[]bytTemp=mobjCryptoService.Key;

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intKeyLength=bytTemp.Length;

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if（sTemp.Length>KeyLength）

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sTemp=sTemp.Substring（0,KeyLength）;

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elseif（sTemp.Length

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sTemp=sTemp.PadRight（KeyLength,''）;

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returnASCIIEncoding.ASCII.GetBytes（sTemp）;

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}

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///

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///初试向量IV

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privatebyte[]GetLegalIV（）

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{

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stringsTemp="E4ghj*Ghg7!

rNIfb&95GUY86GfghUb#er57HBh（u%g6HJ（$jhWk7&!

hg4ui%$hjk";

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mobjCryptoService.GenerateIV（）;

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byte[]bytTemp=mobjCryptoService.IV;

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intIVLength=bytTemp.Length;

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if（sTemp.Length>IVLength）

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sTemp=sTemp.Substring（0,IVLength）;

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elseif（sTemp.Length

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sTemp=sTemp.PadRight（IVLength,''）;

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returnASCIIEncoding.ASCII.GetBytes（sTemp）;

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}

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///

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///待加密的串

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///经过加密的串

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publicstringEncrypto（stringSource）

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{

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

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MemoryStreamms=newMemoryStream（）;

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mobjCryptoService.Key=GetLegalKey（）;

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mobjCryptoService.IV=GetLegalIV（）;

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ICryptoTransformencrypto=mobjCryptoService.CreateEncryptor（）;

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

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cs.Write（bytIn,0,bytIn.Length）;

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cs.FlushFinalBlock（）;

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ms.Close（）;

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byte[]bytOut=ms.ToArray（）;

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returnConvert.ToBase64String（bytOut）;

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}

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///

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///待解密的串

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///经过解密的串

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publicstringDecrypto（stringSource）

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{

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

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

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mobjCryptoService.Key=GetLegalKey（）;

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mobjCryptoService.IV=GetLegalIV（）;

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ICryptoTransformencrypto=mobjCryptoService.CreateDecryptor（）;

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

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StreamReadersr=newStreamReader（cs）;

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returnsr.ReadToEnd（）;

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}

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01

方法五：

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usingSystem.IO;

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usingSystem.Security.Cryptography;

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usingSystem.Text;

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...

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//默认密钥向量

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

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///

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///待加密的字符串

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///加密密钥,要求为8位

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///加密成功返回加密后的字符串，失败返回源串

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publicstaticstringEncryptDES（stringencryptString,stringencryptKey）

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{

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try

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{

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

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byte[]rgbIV=Keys;

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

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DESCryptoServiceProviderdCSP=newDESCryptoServiceProvider（）;

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MemoryStreammStream=newMemoryStream（）;

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

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

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cStream.FlushFinalBlock（）;

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returnConvert.ToBase64String（mStream.ToArray（））;

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}

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catch

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{

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returnencryptString;

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}

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}

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///

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///待解密的字符串

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///解密密钥,要求为8位,和加密密钥相同

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///解密成功返回解密后的字符串，失败返源串

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publicstaticstringDecryptDES（stringdecryptString,stringdecryptKey）

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{

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try

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{

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

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byte[]rgbIV=Keys;

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

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DESCryptoServiceProviderDCSP=newDESCryptoServiceProvider（）;

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MemoryStreammStream=newMemoryStream（）;

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

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

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cStream.FlushFinalBlock（）;

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

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}

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catch

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{

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returndecryptString;

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}

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}

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01

方法六（文件加密）：

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usingSystem.IO;

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usingSystem.Security.Cryptography;

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usingSystem.Text;

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...

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//加密文件

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

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{

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//Createthefilestreamstohandletheinputandoutputfiles.

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

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

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fout.SetLength（0）;

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//Createvariablestohelpwithreadandwrite.

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

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longrdlen=0;//Thisisthetotalnumberofbyteswritten.

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longtotlen=fin.Length;//Thisisthetotallengthoftheinputfile.

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intlen;//Thisisthenumberofbytestobewrittenatatime.

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DESdes=newDESCryptoServiceProvider（）;

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

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//Readfromtheinputfile,thenencryptandwritetotheoutputfile.

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while（rdlen

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{

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len=fin.Read（bin,0,100）;