SDAP: Add return code ERR_ACCOUNT_LOCKED

Add code to distinquish state when account is locked in Active
Directory server.

Tested against Windows Server 2012

This patch is best effort only as decision whether account is actually
locked is based on parsing error message returned by AD. The format and
content of this error message might be subject of change in future
releases and also can be modified by AD administrators.

If account is locked bind operation is expected to return following
error message:

-----------------------------------------------------------------------
Invalid credentials(49), 80090308: LdapErr: DSID-0C0903C5, comment:
AcceptSecurityContext error, data 775, v23f0
-----------------------------------------------------------------------

Where sub string 'data 775' implies that account is locked
(ERROR_ACCOUNT_LOCKED_OUT) [1]. However the 80090308 (error code
0x80090308, SEC_E_INVALID_TOKEN) is the only guaranteed part of error
string [2].

Error message is described in further detail as [3]:
-----------------------------------------------------------------------
When the server fails an LDAP operation with an error, and the server
has sufficient resources to compute a string value for the errorMessage
field of the LDAPResult, it includes a string in the errorMessage field
of the LDAPResult (see [RFC2251] section 4.1.10). The string contains
further information about the error.

The first eight characters of the errorMessage string are a 32-bit
integer, expressed in hexadecimal. Where protocol specifies the extended
error code "<unrestricted>" there is no restriction on the value of the
32-bit integer.  It is recommended that implementations use a Windows
error code for the 32-bit integer in this case in order to improve
usability of the directory for clients.  Where protocol specifies an
extended error code which is a Windows error code, the 32-bit integer is
the specified Windows error code.  Any data after the eighth character
is strictly informational and used only for debugging. Conformant
implementations need not put any value beyond the eighth character of
the errorMessage field.
-----------------------------------------------------------------------

[1] https://msdn.microsoft.com/en-us/library/windows/desktop/ms681386%28v=vs.85%29.aspx
[2] https://social.msdn.microsoft.com/Forums/en-US/e1d600c8-60b7-4ed0-94cb-20ddd6c1a1c6/msadts-user-locking-password-policies?forum=os_windowsprotocols
[3] MS-ADTS 3.1.1.3.1.9
    https://msdn.microsoft.com/en-us/library/cc223253.aspx

Resolves:
https://fedorahosted.org/sssd/ticket/2839

Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

0 files changed, 0 insertions, 0 deletions