MD5算法的T-SQL实现（FOR SQL2000）（一）
时间:2007-11-09 来源:不详 作者:迈克DB
DROP FUNCTION [dbo].[MD5_GG]
GO
/*****************************************************************************
* Name: MD5_GG
* Description: MD5_GG
*****************************************************************************/
CREATE FUNCTION dbo.MD5_GG(
@a INT
,@b INT
,@c INT
,@d INT
,@x INT
,@s INT
,@ac INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
SET @a = dbo.MD5_AddUnsigned(@a, dbo.MD5_AddUnsigned(dbo.MD5_AddUnsigned(dbo.MD5_G(@b, @c, @d), @x), @ac))
SET @a = dbo.MD5_RotateLeft(@a, @s)
SET @a = dbo.MD5_AddUnsigned(@a, @b)
RETURN(@a)
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_HH]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_HH]
GO
/*****************************************************************************
* Name: MD5_HH
* Description: MD5_HH
*****************************************************************************/ copyright dedecms
CREATE FUNCTION dbo.MD5_HH(
@a INT
,@b INT
,@c INT
,@d INT
,@x INT
,@s INT
,@ac INT
)
RETURNS INT
WITH ENCRYPTION
AS
BEGIN
SET @a = dbo.MD5_AddUnsigned(@a, dbo.MD5_AddUnsigned(dbo.MD5_AddUnsigned(dbo.MD5_H(@b, @c, @d), @x), @ac))
SET @a = dbo.MD5_RotateLeft(@a, @s)
SET @a = dbo.MD5_AddUnsigned(@a, @b)
RETURN(@a)
END
GO
IF EXISTS(SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[MD5_II]') AND xtype IN(N'FN', N'IF', N'TF'))
DROP FUNCTION [dbo].[MD5_II]
GO
/*****************************************************************************
* Name: MD5_II
* Description: MD5_II
*****************************************************************************/
CREATE FUNCTION dbo.MD5_II(
@a INT
,@b INT
,@c INT
,@d INT
,@x INT
,@s INT
,@ac INT
)
RETURNS INT
内容来自dedecms
WITH ENCRYPTION
AS
BEGIN
SET @a = dbo.MD5_AddUnsigned(@a, dbo.MD5_AddUnsigned(dbo.MD5_AddUnsigned(dbo.MD5_I(@b, @c, @d), @x), @ac))
SET @a = dbo.MD5_RotateLeft(@a, @s)
SET @a = dbo.MD5_AddUnsigned(@a, @b)
RETURN(@a)
END
GO
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