Tuesday, January 1, 2019

How to transfer logins and passwords between SQL Server

Transfer logins and passwords to destination server (Server A) using scripts generated on source server (Server B)

To create a script on the source Server, follow these steps:

  1. On server A, start SQL Server Management Studio, and then connect to the instance of SQL Server from which you moved the database.
  2. 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.
  3. Run the following statement in the same or a new query window:

    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.

Steps on the destination server (Server B):


  • On server B, start SQL Server Management Studio, and then connect to the instance of SQL Server to which you moved the database.
  • Open a new Query Editor window, and then run the output script that's generated in step 2 of the preceding procedure.

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