NAME

       Wallet::ACL::LDAP::Attribute - Wallet ACL verifier for LDAP attribute compares

SYNOPSIS

           my $verifier = Wallet::ACL::LDAP::Attribute->new;
           my $status = $verifier->check ($principal, "$attr=$value");
           if (not defined $status) {
               die "Something failed: ", $verifier->error, "\n";
           } elsif ($status) {
               print "Access granted\n";
           } else {
               print "Access denied\n";
           }

DESCRIPTION

       Wallet::ACL::LDAP::Attribute checks whether the LDAP record for the entry corresponding to a principal
       contains an attribute with a particular value.  It is used to verify ACL lines of type "ldap-attr".  The
       value of such an ACL is a valid LDAP filter, and the ACL grants access to a given principal if and only
       if an LDAP search using a filter constructed of the principal filter AND the ACL filter returns a single
       entry.

       To use this object, several configuration parameters must be set.  See Wallet::Config for details on
       those configuration parameters and information about how to set wallet configuration.

METHODS

       new()
           Creates a new ACL verifier.  Opens and binds the connection to the LDAP server.

       check(PRINCIPAL, ACL)
           Returns  true  if  PRINCIPAL  is granted access according to ACL, false if not, and undef on an error
           (see "DIAGNOSTICS" below).  ACL must be a valid LDAP filter.  The filter formed using  the  PRINCIPAL
           and the ACL filter must return a single entry for access to be granted.

       error()
           Returns the error if check() returned undef.

DIAGNOSTICS

       The new() method may fail with one of the following exceptions:

       LDAP attribute ACL support not available: %s
           Attempting to connect or bind to the LDAP server failed.

       LDAP attribute ACL support not configured
           The  required  configuration  parameters  were  not  set.   See  Wallet::Config(3)  for  the required
           configuration parameters and how to set them.

       Verifying an LDAP attribute ACL may fail with the following errors (returned by the error() method):

       search for %s failed in LDAP: %s
           The search for an ldap entry failed because of a configuration error in Wallet or  the  LDAP  server.
           For example the Wallet configuration includes an invalid root DN.

       malformed ldap-attr LDAP filter, no equal sign present
           The ACL filter stored as ldap-attr is not a valid LDAP filter.

       malformed ldap-attr LDAP filter, parenthesis mismatch
           The ACL filter stored as ldap-attr is not a valid LDAP filter.

       mapping principal to LDAP failed: %s
           There  was  an  ldap_map_principal() function defined in the wallet configuration, but calling it for
           the PRINCIPAL argument failed.

       no ACL specified
           The ACL parameter to check() was undefined or the empty string.

       no principal specified
           The PRINCIPAL parameter to check() was undefined or the empty string.

SEE ALSO

       Wallet::ACL(3), Wallet::ACL::Base(3), Wallet::Config(3), wallet-backend(8)

       This  module   is   part   of   the   wallet   system.    The   current   version   is   available   from
       <https://www.eyrie.org/~eagle/software/wallet/>.

AUTHOR

       Russ Allbery <eagle@eyrie.org>

perl v5.40.0                                       2024-11-12                  Wallet::ACL::LDAP::Attribute(3pm)