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一對(duì)加密解密類[導(dǎo)入]

public ??? string ??Encrypt( string ??pToEncrypt,?? string ??sKey)??

???????? {??

????????????DESCryptoServiceProvider??des?? = ?? new ??DESCryptoServiceProvider();??

???????????? byte []??inputByteArray?? = ??Encoding.Default.GetBytes(pToEncrypt);???

????????????des.Key?? = ??ASCIIEncoding.ASCII.GetBytes(sKey);??

????????????des.IV?? = ??ASCIIEncoding.ASCII.GetBytes(sKey);??

????????????MemoryStream??ms?? = ?? new ??MemoryStream();??

????????????CryptoStream??cs?? = ?? new ??CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write);??

????????????cs.Write(inputByteArray,?? 0 ,??inputByteArray.Length);??

????????????cs.FlushFinalBlock();?????????????

????????????StringBuilder??ret?? = ?? new ??StringBuilder();??

???????????? foreach ( byte ??b?? in ??ms.ToArray())??

???????????? {??

???????????????? // Format??as??hex??

????????????????ret.AppendFormat( " {0:X2} " ,??b);??

????????????} ??

????????????ret.ToString();??

???????????? return ??ret.ToString();??

????????} ??

???????? /* *****************************************************************

?????????*?密碼解密

?????????*?***************************************************************** */

???????? public ?? string ??Decrypt( string ??pToDecrypt,?? string ??sKey)??

???????? {??

????????????DESCryptoServiceProvider??des?? = ?? new ??DESCryptoServiceProvider();??????????????

???????????? byte []??inputByteArray?? = ?? new ?? byte [pToDecrypt.Length?? / ?? 2 ];??

???????????? for ( int ??x?? = ?? 0 ;??x?? < ??pToDecrypt.Length?? / ?? 2 ;??x ++ )??

???????????? {??

???????????????? int ??i?? = ??(Convert.ToInt32(pToDecrypt.Substring(x?? * ?? 2 ,?? 2 ),?? 16 ));??

????????????????inputByteArray[x]?? = ??( byte )i;??

????????????} ??

????????????des.Key?? = ??ASCIIEncoding.ASCII.GetBytes(sKey);??

????????????des.IV?? = ??ASCIIEncoding.ASCII.GetBytes(sKey);??

????????????MemoryStream??ms?? = ?? new ??MemoryStream();??

????????????CryptoStream??cs?? = ?? new ??CryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write);?????????????

????????????cs.Write(inputByteArray,?? 0 ,??inputByteArray.Length);??

????????????cs.FlushFinalBlock();?????????????

????????????StringBuilder??ret?? = ?? new ??StringBuilder();??

?????????????

???????????? return ??System.Text.Encoding.Default.GetString(ms.ToArray());??

????????}

posted on 2006-05-28 14:45 record java and net 閱讀(341) 評(píng)論(0) 編輯收藏所屬分類: dot net相關(guān)

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