Why is the PWDCOMPARE function not supported on an Azure SQL Server 2014 database

Question

I have tried to publish a database from our local SQL Server to Azure but receive an error saying PWDCOMPARE is not supported with no link to a reason why.
We are using HASHBYTES function to encrypt passwords in our database and
PWDCOMPARE to validate them and we currently don't have an alternative (see article: http://sqlity.net/en/2460/sql-password-hash/). The PWDCOMPARE function is referenced by a stored procedure,
which is what won't publish to Azure.
It would be useful to know if it will be supported or if we should create a VM instead.
EDIT: Further Clarified question above, but basically the functions listed are documented in MSDN and there is no mention of them being undocumented unsupported features.
The error occurs when trying to publish a database to Azure from SQL Server 2014 Management Studio

Answer 1

Hi,
I am not an expert to answer this but am trying my best to answer this query.
Hashes a password and compares the hash to the hash of an existing password. PWDCOMPARE can be used to search for blank SQL Server login passwords or common weak passwords.
Syntax
PWDCOMPARE ( 'clear_text_password'
   , password_hash
   [ , version ] )
Note: This feature will be removed in the next version of Microsoft SQL Server. Do not use this feature in new development work, and modify applications that currently use this feature as soon as possible.
I am not sure whether this feature is not available on SQL 2014.
I think you can solve this issue by using the EXECUTE AS. Add this query into a procedure with EXECUTE AS with the user/login with sufficient permissions on the server.
 Refer to belw link for more details on EXECUTE AS
http://msdn.microsoft.com/en-us/library/ms188354.aspx
create
procedure checkpassword
@UserName
SYSNAME
,@Password
VARCHAR(1000)
WITH
EXECUTE AS
'<UserName>'
as
select
pwdcompare(@Password,convert(nvarchar(128),password))
from master.dbo.syslogins
(nolock)
 where name=@UserName
GO
EXEC checkpassword
@UserName='test',@Password='12345678'
Girish Prajwal