在sql语句中实现md5功能-Database-技术教程-asp编程网

最近在做主站会员与discuz论坛会员整合的时候，遇到一个这样的问题
主站会员密码没有加密，而论坛会员要求加密。现在要将主站的会员导入到论坛中去，所以要给它加密。但是现在的问题是我的会员量太大，如果写个程序去导入，时间会很长，但程序又会出超时，如果直接在sql server中的有md5功能就好办了。直接在数据库中运行一下就行了。
在网上找了一段时间，找到了这个函数，终于实现了这个功能。
代码如下：

IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_m_OnBits]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_m_OnBits]
GO
/*****************************************************************************
* Name: MD5_m_OnBits
* Description: 常数组
*****************************************************************************/
CREATE FUNCTION dbo.MD5_m_OnBits(
@i TINYINT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
DECLARE @iRes INT
SELECT @iRes =
CASE @i
WHEN 0 THEN 1 -- 00000000000000000000000000000001
WHEN 1 THEN 3 -- 00000000000000000000000000000011
WHEN 2 THEN 7 -- 00000000000000000000000000000111
WHEN 3 THEN 15 -- 00000000000000000000000000001111
WHEN 4 THEN 31 -- 00000000000000000000000000011111
WHEN 5 THEN 63 -- 00000000000000000000000000111111
WHEN 6 THEN 127 -- 00000000000000000000000001111111
WHEN 7 THEN 255 -- 00000000000000000000000011111111
WHEN 8 THEN 511 -- 00000000000000000000000111111111
WHEN 9 THEN 1023 -- 00000000000000000000001111111111
WHEN 10 THEN 2047 -- 00000000000000000000011111111111
WHEN 11 THEN 4095 -- 00000000000000000000111111111111
WHEN 12 THEN 8191 -- 00000000000000000001111111111111
WHEN 13 THEN 16383 -- 00000000000000000011111111111111
WHEN 14 THEN 32767 -- 00000000000000000111111111111111
WHEN 15 THEN 65535 -- 00000000000000001111111111111111
WHEN 16 THEN 131071 -- 00000000000000011111111111111111
WHEN 17 THEN 262143 -- 00000000000000111111111111111111
WHEN 18 THEN 524287 -- 00000000000001111111111111111111
WHEN 19 THEN 1048575 -- 00000000000011111111111111111111
WHEN 20 THEN 2097151 -- 00000000000111111111111111111111
WHEN 21 THEN 4194303 -- 00000000001111111111111111111111
WHEN 22 THEN 8388607 -- 00000000011111111111111111111111
WHEN 23 THEN 16777215 -- 00000000111111111111111111111111
WHEN 24 THEN 33554431 -- 00000001111111111111111111111111
WHEN 25 THEN 67108863 -- 00000011111111111111111111111111
WHEN 26 THEN 134217727 -- 00000111111111111111111111111111
WHEN 27 THEN 268435455 -- 00001111111111111111111111111111
WHEN 28 THEN 536870911 -- 00011111111111111111111111111111
WHEN 29 THEN 1073741823 -- 00111111111111111111111111111111
WHEN 30 THEN 2147483647 -- 01111111111111111111111111111111
ELSE 0
END
RETURN(@iRes)
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_m_2Power]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_m_2Power]
GO
/*****************************************************************************
* Name: MD5_m_2Power
* Description: 常数组
*****************************************************************************/
CREATE FUNCTION dbo.MD5_m_2Power(
@i TINYINT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
DECLARE @iRes INT
SELECT @iRes =
CASE @i
WHEN 0 THEN 1 -- 00000000000000000000000000000001
WHEN 1 THEN 2 -- 00000000000000000000000000000010
WHEN 2 THEN 4 -- 00000000000000000000000000000100
WHEN 3 THEN 8 -- 00000000000000000000000000001000
WHEN 4 THEN 16 -- 00000000000000000000000000010000
WHEN 5 THEN 32 -- 00000000000000000000000000100000
WHEN 6 THEN 64 -- 00000000000000000000000001000000
WHEN 7 THEN 128 -- 00000000000000000000000010000000
WHEN 8 THEN 256 -- 00000000000000000000000100000000
WHEN 9 THEN 512 -- 00000000000000000000001000000000
WHEN 10 THEN 1024 -- 00000000000000000000010000000000
WHEN 11 THEN 2048 -- 00000000000000000000100000000000
WHEN 12 THEN 4096 -- 00000000000000000001000000000000
WHEN 13 THEN 8192 -- 00000000000000000010000000000000
WHEN 14 THEN 16384 -- 00000000000000000100000000000000
WHEN 15 THEN 32768 -- 00000000000000001000000000000000
WHEN 16 THEN 65536 -- 00000000000000010000000000000000
WHEN 17 THEN 131072 -- 00000000000000100000000000000000
WHEN 18 THEN 262144 -- 00000000000001000000000000000000
WHEN 19 THEN 524288 -- 00000000000010000000000000000000
WHEN 20 THEN 1048576 -- 00000000000100000000000000000000
WHEN 21 THEN 2097152 -- 00000000001000000000000000000000
WHEN 22 THEN 4194304 -- 00000000010000000000000000000000
WHEN 23 THEN 8388608 -- 00000000100000000000000000000000
WHEN 24 THEN 16777216 -- 00000001000000000000000000000000
WHEN 25 THEN 33554432 -- 00000010000000000000000000000000
WHEN 26 THEN 67108864 -- 00000100000000000000000000000000
WHEN 27 THEN 134217728 -- 00001000000000000000000000000000
WHEN 28 THEN 268435456 -- 00010000000000000000000000000000
WHEN 29 THEN 536870912 -- 00100000000000000000000000000000
WHEN 30 THEN 1073741824 -- 01000000000000000000000000000000
ELSE 0
END
RETURN(@iRes)
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_LShift]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_LShift]
GO
/*****************************************************************************
* Name: MD5_LShift
* Description: MD5_LShift
*****************************************************************************/
CREATE FUNCTION dbo.MD5_LShift(
@ivalue INT
,@iShiftBits TINYINT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
DECLARE @iRes BIGINT
SET @iRes = CAST(@ivalue AS BINARY(8))
SET @iRes = @iRes * dbo.MD5_m_2Power(@iShiftBits)
RETURN(CAST(@iRes & 0x00000000FFFFFFFF AS BINARY(4)))
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_RShift]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_RShift]
GO
/*****************************************************************************
* Name: MD5_RShift
* Description: MD5_RShift
*****************************************************************************/
CREATE FUNCTION dbo.MD5_RShift(
@ivalue INT
,@iShiftBits TINYINT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
DECLARE @iRes BIGINT
SET @iRes = CAST(@ivalue AS BINARY(8))
SET @iRes = @iRes / dbo.MD5_m_2Power(@iShiftBits)
RETURN(CAST(@iRes & 0x00000000FFFFFFFF AS BINARY(4)))
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_RotateLeft]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_RotateLeft]
GO
/*****************************************************************************
* Name: MD5_RotateLeft
* Description: MD5_RotateLeft
*****************************************************************************/
CREATE FUNCTION dbo.MD5_RotateLeft(
@ivalue INT
,@iShiftBits TINYINT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
RETURN(dbo.MD5_LShift(@ivalue, @iShiftBits) | dbo.MD5_RShift(@ivalue, (32 - @iShiftBits)))
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_AddUnsigned]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_AddUnsigned]
GO
/*****************************************************************************
* Name: MD5_AddUnsigned
* Description: MD5_AddUnsigned
*****************************************************************************/
CREATE FUNCTION dbo.MD5_AddUnsigned(
@iX INT
,@iY INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
DECLARE @iRes BIGINT
SET @iRes = CAST(CAST(@iX AS BINARY(8)) AS BIGINT) + CAST(CAST(@iY AS BINARY(8)) AS BIGINT)
RETURN(CAST(@iRes & 0x00000000FFFFFFFF AS BINARY(4)))
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_F]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_F]
GO
/*****************************************************************************
* Name: MD5_F
* Description: MD5_F
*****************************************************************************/
CREATE FUNCTION dbo.MD5_F(
@x INT
,@y INT
,@z INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
RETURN((@x & @y) | ((~@x) & @z))
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_G]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_G]
GO
/*****************************************************************************
* Name: MD5_G
* Description: MD5_G
*****************************************************************************/
CREATE FUNCTION dbo.MD5_G(
@x INT
,@y INT
,@z INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
RETURN((@x & @z) | (@y & (~@z)))
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_H]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_H]
GO
/*****************************************************************************
* Name: MD5_H
* Description: MD5_H
*****************************************************************************/
CREATE FUNCTION dbo.MD5_H(
@x INT
,@y INT
,@z INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
RETURN(@x ^ @y ^ @z)
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_I]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_I]
GO
/*****************************************************************************
* Name: MD5_I
* Description: MD5_I
*****************************************************************************/
CREATE FUNCTION dbo.MD5_I(
@x INT
,@y INT
,@z INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN

在sql语句中实现md5功能

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