DES加密 解密

1

///2
///des加密(資料加密標準，速度較快，適用於加密大量資料的場合)
3///
4///
待加密的密文
5///
加密的金鑰
6///
returns
7public
static
string desencrypt(string encryptstring, string
encryptkey)813
14if (string.isnullorempty(encryptkey) || encryptkey.length != 8)15
18byte m_btiv = ;
19string m_strencrypt = ""
;20 descryptoserviceprovider m_desprovider = new
descryptoserviceprovider();
2122
try23
33catch (ioexception ex) 
34catch (cryptographicexception ex) 
35catch (argumentexception ex) 
36catch (exception ex) 
37finally
3839
return
m_strencrypt;
40 }

1

///2
///des 解密(資料加密標準，速度較快，適用於加密大量資料的場合)
3///
4///
待解密的密文
5///
解密的金鑰
6///
returns
7public
static
string desdecrypt(string decryptstring, string
decryptkey)813
14if (string.isnullorempty(decryptkey) || decryptkey.length != 8)15
1819
byte m_btiv = ;
20string m_strdecrypt = ""
;21 descryptoserviceprovider m_desprovider = new
descryptoserviceprovider();
2223
try24
3435
catch
(ioexception ex) 
36catch
(cryptographicexception ex) 
37catch
(argumentexception ex) 
38catch
(exception ex) 
39finally
4041
return
m_strdecrypt;
42 }

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