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MD5算法的T-SQL实现(FOR SQL2000)(二)

时间:2007-11-09  来源:不详  作者:迈克DB

                      WHEN 3 THEN '3'
                      WHEN 4 THEN '4'
                      WHEN 5 THEN '5'
                      WHEN 6 THEN '6'
                      WHEN 7 THEN '7'
                      WHEN 8 THEN '8'
                      WHEN 9 THEN '9'
                      WHEN 10 THEN 'A'
                      WHEN 11 THEN 'B'
                      WHEN 12 THEN 'C'
                      WHEN 13 THEN 'D'
                      WHEN 14 THEN 'E'
                      WHEN 15 THEN 'F'
                      ELSE '' END
              CASE @iTmp % 16 WHEN 0 THEN '0'
                      WHEN 1 THEN '1'
                      WHEN 2 THEN '2' 织梦内容管理系统
                      WHEN 3 THEN '3'
                      WHEN 4 THEN '4'
                      WHEN 5 THEN '5'
                      WHEN 6 THEN '6'
                      WHEN 7 THEN '7'
                      WHEN 8 THEN '8'
                      WHEN 9 THEN '9'
                      WHEN 10 THEN 'A'
                      WHEN 11 THEN 'B'
                      WHEN 12 THEN 'C'
                      WHEN 13 THEN 'D'
                      WHEN 14 THEN 'E'
                      WHEN 15 THEN 'F'
                      ELSE '' END
    SET @iCount = @iCount 1
  END
  RETURN(@sRes)
END
GO

IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5]') AND xtype IN(N'FN', N'IF', N'TF')) 织梦好,好织梦
  DROP FUNCTION [dbo].[MD5]
GO
/*****************************************************************************
* Name: MD5
* Description: MD5
*****************************************************************************/
CREATE FUNCTION dbo.MD5(
   @sOrigMess  NVARCHAR(4000)
)
RETURNS CHAR(32)
WITH ENCRYPTION
AS
BEGIN
  --====================================
  DECLARE @S11 TINYINT
  DECLARE @S12 TINYINT
  DECLARE @S13 TINYINT
  DECLARE @S14 TINYINT
  DECLARE @S21 TINYINT
  DECLARE @S22 TINYINT
  DECLARE @S23 TINYINT
  DECLARE @S24 TINYINT
  DECLARE @S31 TINYINT
  DECLARE @S32 TINYINT
  DECLARE @S33 TINYINT
  DECLARE @S34 TINYINT
  DECLARE @S41 TINYINT
  DECLARE @S42 TINYINT
  DECLARE @S43 TINYINT
  DECLARE @S44 TINYINT

  SELECT @S11 = 7, @S12 = 12, @S13 = 17, @S14 = 22

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