Transfer logins and passwords between instances of SQL Server(revlogin)

To create a log in script that has a blank password, follow these steps:

On server A, start SQL Server Management Studio, and then connect to the instance of SQL Server from which you moved the database.

Open a new Query Editor window, and then run the following script.

USE master

GO

IF OBJECT_ID ('sp_hexadecimal') IS NOT NULL

  DROP PROCEDURE sp_hexadecimal

GO

CREATE PROCEDURE sp_hexadecimal

    @binvalue varbinary(256),

    @hexvalue varchar (514) OUTPUT

AS

DECLARE @charvalue varchar (514)

DECLARE @i int

DECLARE @length int

DECLARE @hexstring char(16)

SELECT @charvalue = '0x'

SELECT @i = 1

SELECT @length = DATALENGTH (@binvalue)

SELECT @hexstring = '0123456789ABCDEF'

WHILE (@i <= @length)

BEGIN

  DECLARE @tempint int

  DECLARE @firstint int

  DECLARE @secondint int

  SELECT @tempint = CONVERT(int, SUBSTRING(@binvalue,@i,1))

  SELECT @firstint = FLOOR(@tempint/16)

  SELECT @secondint = @tempint - (@firstint*16)

  SELECT @charvalue = @charvalue +

    SUBSTRING(@hexstring, @firstint+1, 1) +

    SUBSTRING(@hexstring, @secondint+1, 1)

  SELECT @i = @i + 1

END

SELECT @hexvalue = @charvalue

GO

IF OBJECT_ID ('sp_help_revlogin') IS NOT NULL

  DROP PROCEDURE sp_help_revlogin

GO

CREATE PROCEDURE sp_help_revlogin @login_name sysname = NULL AS

DECLARE @name sysname

DECLARE @type varchar (1)

DECLARE @hasaccess int

DECLARE @denylogin int

DECLARE @is_disabled int

DECLARE @PWD_varbinary  varbinary (256)

DECLARE @PWD_string  varchar (514)

DECLARE @SID_varbinary varbinary (85)

DECLARE @SID_string varchar (514)

DECLARE @tmpstr  varchar (1024)

DECLARE @is_policy_checked varchar (3)

DECLARE @is_expiration_checked varchar (3)

DECLARE @defaultdb sysname

IF (@login_name IS NULL)

  DECLARE login_curs CURSOR FOR

      SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM

sys.server_principals p LEFT JOIN sys.syslogins l

      ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name <> 'sa'

ELSE

  DECLARE login_curs CURSOR FOR

      SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM

sys.server_principals p LEFT JOIN sys.syslogins l

      ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name = @login_name

OPEN login_curs

FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin

IF (@@fetch_status = -1)

BEGIN

  PRINT 'No login(s) found.'

  CLOSE login_curs

  DEALLOCATE login_curs

  RETURN -1

END

SET @tmpstr = '/* sp_help_revlogin script '

PRINT @tmpstr

SET @tmpstr = '** Generated ' + CONVERT (varchar, GETDATE()) + ' on ' + @@SERVERNAME + ' */'

PRINT @tmpstr

PRINT ''

WHILE (@@fetch_status <> -1)

BEGIN

  IF (@@fetch_status <> -2)

  BEGIN

    PRINT ''

    SET @tmpstr = '-- Login: ' + @name

    PRINT @tmpstr

    IF (@type IN ( 'G', 'U'))

    BEGIN -- NT authenticated account/group

      SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' FROM WINDOWS WITH DEFAULT_DATABASE = [' + @defaultdb + ']'

    END

    ELSE BEGIN -- SQL Server authentication

        -- obtain password and sid

            SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, 'PasswordHash' ) AS varbinary (256) )

        EXEC sp_hexadecimal @PWD_varbinary, @PWD_string OUT

        EXEC sp_hexadecimal @SID_varbinary,@SID_string OUT

        -- obtain password policy state

        SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name

        SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name

            SET @tmpstr = 'CREATE LOGIN ' + QUOTENAME( @name ) + ' WITH PASSWORD = ' + @PWD_string + ' HASHED, SID = ' + @SID_string + ', DEFAULT_DATABASE = [' + @defaultdb + ']'

        IF ( @is_policy_checked IS NOT NULL )

        BEGIN

          SET @tmpstr = @tmpstr + ', CHECK_POLICY = ' + @is_policy_checked

        END

        IF ( @is_expiration_checked IS NOT NULL )

        BEGIN

          SET @tmpstr = @tmpstr + ', CHECK_EXPIRATION = ' + @is_expiration_checked

        END

    END

    IF (@denylogin = 1)

    BEGIN -- login is denied access

      SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )

    END

    ELSE IF (@hasaccess = 0)

    BEGIN -- login exists but does not have access

      SET @tmpstr = @tmpstr + '; REVOKE CONNECT SQL TO ' + QUOTENAME( @name )

    END

    IF (@is_disabled = 1)

    BEGIN -- login is disabled

      SET @tmpstr = @tmpstr + '; ALTER LOGIN ' + QUOTENAME( @name ) + ' DISABLE'

    END

    PRINT @tmpstr

  END

  FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin

   END

CLOSE login_curs

DEALLOCATE login_curs

RETURN 0

GO

Note This script creates two stored procedures in the master database. The procedures are named sp_hexadecimal and sp_help_revlogin.

Run the following statement:

EXEC sp_help_revlogin

The output script that the sp_help_revlogin stored procedure generates is the login script. This login script creates the logins that have the original Security Identifier (SID) and the original password.

On server B, start SQL Server Management Studio, and then connect to the instance of SQL Server to which you moved the database.

Important Before you go to step 5, review the information in the "Remarks" section.

Open a new Query Editor window, and then run the output script that is generated in step 3.

Thanks

Venkat Sangu