C#加密算法汇总.docx

C#加密算法汇总.docx

《C#加密算法汇总.docx》由会员分享，可在线阅读，更多相关《C#加密算法汇总.docx（28页珍藏版）》请在冰点文库上搜索。

C#加密算法汇总

C#加密算法汇总

viewsourceprint?

01

方法一：

02

//须添加对System.Web的引用

03

usingSystem.Web.Security;

04

05

...

06

07

///

10

///源字符串

11

///加密后的字符串

12

publicstringSHA1（stringsource）

13

{

14

returnFormsAuthentication.HashPasswordForStoringInConfigFile（source,"SHA1"）;

15

}

16

17

18

///

21

///源字符串

22

///加密后的字符串

23

publicstringMD5（stringsource）

24

{

25

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

26

}

viewsourceprint?

01

方法二（可逆加密解密）：

02

usingSystem.Security.Cryptography;

03

04

...

05

06

publicstringEncode（stringdata）

07

{

08

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

09

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

10

11

DESCryptoServiceProvidercryptoProvider=newDESCryptoServiceProvider（）;

12

inti=cryptoProvider.KeySize;

13

MemoryStreamms=newMemoryStream（）;

14

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

15

16

StreamWritersw=newStreamWriter（cst）;

17

sw.Write（data）;

18

sw.Flush（）;

19

cst.FlushFinalBlock（）;

20

sw.Flush（）;

21

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

22

23

}

24

25

publicstringDecode（stringdata）

26

{

27

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

28

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

29

30

byte[]byEnc;

31

try

32

{

33

byEnc=Convert.FromBase64String（data）;

34

}

35

catch

36

{

37

returnnull;

38

}

39

40

DESCryptoServiceProvidercryptoProvider=newDESCryptoServiceProvider（）;

41

MemoryStreamms=newMemoryStream（byEnc）;

42

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

43

StreamReadersr=newStreamReader（cst）;

44

returnsr.ReadToEnd（）;

45

}

viewsourceprint?

01

方法三（MD5不可逆）：

02

usingSystem.Security.Cryptography;

03

04

...

05

06

//MD5不可逆加密

07

08

//32位加密

09

10

publicstringGetMD5_32（strings,string_input_charset）

11

{

12

MD5md5=newMD5CryptoServiceProvider（）;

13

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

14

StringBuildersb=newStringBuilder（32）;

15

for（inti=0;i

16

{

17

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

18

}

19

returnsb.ToString（）;

20

}

21

22

//16位加密

23

publicstaticstringGetMd5_16（stringConvertString）

24

{

25

MD5CryptoServiceProvidermd5=newMD5CryptoServiceProvider（）;

26

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

27

t2=t2.Replace（"-",""）;

28

returnt2;

29

}

viewsourceprint?

01

方法四（对称加密）：

02

usingSystem.IO;

03

usingSystem.Security.Cryptography;

04

05

...

06

07

privateSymmetricAlgorithmmobjCryptoService;

08

privatestringKey;

09

///

12

publicSymmetricMethod（）

13

{

14

mobjCryptoService=newRijndaelManaged（）;

15

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

y6&（*jkP87jH7";

16

}

17

///

20

///密钥

21

privatebyte[]GetLegalKey（）

22

{

23

stringsTemp=Key;

24

mobjCryptoService.GenerateKey（）;

25

byte[]bytTemp=mobjCryptoService.Key;

26

intKeyLength=bytTemp.Length;

27

if（sTemp.Length>KeyLength）

28

sTemp=sTemp.Substring（0,KeyLength）;

29

elseif（sTemp.Length

30

sTemp=sTemp.PadRight（KeyLength,''）;

31

returnASCIIEncoding.ASCII.GetBytes（sTemp）;

32

}

33

///

36

///初试向量IV

37

privatebyte[]GetLegalIV（）

38

{

39

stringsTemp="E4ghj*Ghg7!

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

hg4ui%$hjk";

40

mobjCryptoService.GenerateIV（）;

41

byte[]bytTemp=mobjCryptoService.IV;

42

intIVLength=bytTemp.Length;

43

if（sTemp.Length>IVLength）

44

sTemp=sTemp.Substring（0,IVLength）;

45

elseif（sTemp.Length

46

sTemp=sTemp.PadRight（IVLength,''）;

47

returnASCIIEncoding.ASCII.GetBytes（sTemp）;

48

}

49

///

52

///待加密的串

53

///经过加密的串

54

publicstringEncrypto（stringSource）

55

{

56

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

57

MemoryStreamms=newMemoryStream（）;

58

mobjCryptoService.Key=GetLegalKey（）;

59

mobjCryptoService.IV=GetLegalIV（）;

60

ICryptoTransformencrypto=mobjCryptoService.CreateEncryptor（）;

61

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

62

cs.Write（bytIn,0,bytIn.Length）;

63

cs.FlushFinalBlock（）;

64

ms.Close（）;

65

byte[]bytOut=ms.ToArray（）;

66

returnConvert.ToBase64String（bytOut）;

67

}

68

///

71

///待解密的串

72

///经过解密的串

73

publicstringDecrypto（stringSource）

74

{

75

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

76

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

77

mobjCryptoService.Key=GetLegalKey（）;

78

mobjCryptoService.IV=GetLegalIV（）;

79

ICryptoTransformencrypto=mobjCryptoService.CreateDecryptor（）;

80

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

81

StreamReadersr=newStreamReader（cs）;

82

returnsr.ReadToEnd（）;

83

}

viewsourceprint?

01

方法五：

02

usingSystem.IO;

03

usingSystem.Security.Cryptography;

04

usingSystem.Text;

05

06

...

07

08

//默认密钥向量

09

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

10

///

13

///待加密的字符串

14

///加密密钥,要求为8位

15

///加密成功返回加密后的字符串，失败返回源串

16

publicstaticstringEncryptDES（stringencryptString,stringencryptKey）

17

{

18

try

19

{

20

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

21

byte[]rgbIV=Keys;

22

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

23

DESCryptoServiceProviderdCSP=newDESCryptoServiceProvider（）;

24

MemoryStreammStream=newMemoryStream（）;

25

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

26

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

27

cStream.FlushFinalBlock（）;

28

returnConvert.ToBase64String（mStream.ToArray（））;

29

}

30

catch

31

{

32

returnencryptString;

33

}

34

}

35

36

///

39

///待解密的字符串

40

///解密密钥,要求为8位,和加密密钥相同

41

///解密成功返回解密后的字符串，失败返源串

42

publicstaticstringDecryptDES（stringdecryptString,stringdecryptKey）

43

{

44

try

45

{

46

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

47

byte[]rgbIV=Keys;

48

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

49

DESCryptoServiceProviderDCSP=newDESCryptoServiceProvider（）;

50

MemoryStreammStream=newMemoryStream（）;

51

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

52

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

53

cStream.FlushFinalBlock（）;

54

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

55

}

56

catch

57

{

58

returndecryptString;

59

}

60

}

viewsourceprint?

01

方法六（文件加密）：

02

usingSystem.IO;

03

usingSystem.Security.Cryptography;

04

usingSystem.Text;

05

06

...

07

08

//加密文件

09

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

10

{

11

//Createthefilestreamstohandletheinputandoutputfiles.

12

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

13

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

14

fout.SetLength（0）;

15

16

//Createvariablestohelpwithreadandwrite.

17

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

18

longrdlen=0;//Thisisthetotalnumberofbyteswritten.

19

longtotlen=fin.Length;//Thisisthetotallengthoftheinputfile.

20

intlen;//Thisisthenumberofbytestobewrittenatatime.

21

22

DESdes=newDESCryptoServiceProvider（）;

23

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

24

25

//Readfromtheinputfile,thenencryptandwritetotheoutputfile.

26

while（rdlen

27

{

28

len=fin.Read（bin,0,100）;