标签:SqlString text 解密 key new using byte MSSQL CLR
使用 Transact-SQL开启CLR
sp_configure 'show advanced options',1 RECONFIGURE sp_configure 'clr enabled',1 RECONFIGURE
DECLARE @hash AS BINARY(64) = (SELECT HASHBYTES('SHA2_512', (SELECT * FROM OPENROWSET (BULK 'C:\clrDES.dll', SINGLE_BLOB) AS [Data]))) EXEC sp_add_trusted_assembly @hash
编写CLR集成托管DLL
using System; using System.IO; using System.Text; using System.Data; using System.Data.SqlTypes; using System.Security.Cryptography; using Microsoft.SqlServer.Server; public class DES { [SqlFunction(IsDeterministic = true, IsPrecise = true)] public static SqlString DESEncrypt(SqlString text, SqlString key) { if (text.IsNull || key.IsNull || key.Value.Length < 8) return null; return (SqlString)_DESEncrypt(Encoding.Default.GetBytes((string)text), Encoding.Default.GetBytes((string)key), new byte[] { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }); } private static string _DESEncrypt(byte[] text, byte[] key, byte[] iv) { string entext; using (MemoryStream mstream = new MemoryStream()) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); CryptoStream estream = new CryptoStream(mstream, des.CreateEncryptor(key, iv), CryptoStreamMode.Write); try { estream.Write(text, 0, text.Length); estream.FlushFinalBlock(); entext = Convert.ToBase64String(mstream.ToArray()); } finally { estream.Close(); des.Clear(); } } return entext; } [SqlFunction(IsDeterministic = true, IsPrecise = true)] public static SqlString DESDecrypt(SqlString text, SqlString key) { if (text.IsNull || key.IsNull || key.Value.Length < 8) return null; return (SqlString)_DESDecrypt(Convert.FromBase64String((string)text), Encoding.Default.GetBytes((string)key), new byte[] { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }); } private static string _DESDecrypt(byte[] text, byte[] key, byte[] iv) { string detext; using (MemoryStream mstream = new MemoryStream()) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); CryptoStream estream = new CryptoStream(mstream, des.CreateDecryptor(key, iv), CryptoStreamMode.Write); try { estream.Write(text, 0, text.Length); estream.FlushFinalBlock(); detext = Encoding.Default.GetString(mstream.ToArray()); } finally { estream.Close(); des.Clear(); } } return detext; } }
调用示例
select dbo.des_encrypt(N'hello world', N'88888888'); select dbo.des_decrypt(N'+GeLDT6kAxZlm2pnFX8X4w==',N'88888888');
标签:SqlString,text,解密,key,new,using,byte,MSSQL,CLR 来源: https://www.cnblogs.com/microsoft-zh/p/16527972.html
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