GSSAPI • man page

GSSAPI (3)

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NAME

GSSAPI - Perl extension providing access to the GSSAPIv2 library

SYNOPSIS

  use GSSAPI;

  my $targethostname = 'HTTP@moerbsen.grolmsnet.lan';
  my $status;

   TRY: {
       my ($target, $tname, $ttl );
       $status = GSSAPI::Name->import( $target,
                                       $server,
                                       GSSAPI::OID::gss_nt_hostbased_service)
               or last;
       $status = $target->display($tname) or last;
       print "\n using Name $tname";

       my $ctx = GSSAPI::Context->new();
       my $imech = GSSAPI::OID::gss_mech_krb5;
       my $iflags = 0 ;
       my $bindings = GSS_C_NO_CHANNEL_BINDINGS;
       my $creds = GSS_C_NO_CREDENTIAL;
       my $itime = 0;
       my $itoken = q{};
       my $otoken;

       $status = $ctx->init($creds,$target,
                            $imech,$iflags,$itime,$bindings,$itoken,
                            undef, $otoken,undef,undef) or last;
       $status = $ctx->valid_time_left($ttl) or last;
       print "\n Security context's time to live $ttl secs";
   }

   unless ($status->major == GSS_S_COMPLETE  ) {
      print "\nErrors: ", $status;
   } else {
      print "\n seems everything is fine, type klist to see the ticket\n";

DESCRIPTION

This module gives access to the routines of the

GSSAPI

library, as described in rfc2743 and rfc2744 and implemented by the Kerberos-1.2 distribution from

MIT.

Since 0.14 it also compiles and works with Heimdal. Lacks of Heimdal support are gss_release_oid(), gss_str_to_oid() and fail of some tests. Have a look at the tests in t/ directory too see what tests fail on Heimdal ( the *.t tests are just skipping them at the moment)

The

API

presented by this module is a mildly object oriented reinterpretation of the C

API,

where opaque C structures are Perl objects, but the style of function call has been left mostly untouched. As a result, most routines modify one or more of the parameters passed to them, reflecting the C call-by-reference (or call-by-value-return) semantics.

All users of this module are therefore strongly advised to localize all usage of these routines to minimize pain if and when the

API

changes.

USAGE

This module wraps the

GSSAPI

C-Bindings. If you are new to

GSSAPI

it is a good idea to read

RFC2743

and

RFC2744,

the documentation requires you to be familiar with the concept and the wordings of

GSSAPI

programming.

the examples directory holds some working examples of usage:

getcred_hostbased.pl: gets a
GSSAPI
Token for a service specified on commandline. (like kgetcred on Heimdal or kvno on
MIT
)
gss-client.pl: a simple
GSSAPI TCP
client.
gss-server.pl: a simple
GSSAPI TCP
server. Use both as templates if you need quickhacking
GSSAPI
enabeled
GSSAPI TCP
services.

GSSAPI::Name

GSSAPI

internal representation of principalname

Methods

import( $gssapinameobj, $servicename, $mechnism_oid );

converts stringrepresentation $servicename of service into a

GSSAPI

internal format and stores it in $gssapiservicename.

input

servicename: Scalar value, like 'HTTP@moerbsen.grolmsnet.lan'.
mechnism_oid: Chose one of the predefines mechanism OIDs from
GSSAPI::OID

output

$gssapinameobj: GSSAPI
internal representation of servicename

return value

returns GSSAPI::Status Object

Example:

     $status = GSSAPI::Name->import( $gssapinameobj,
                                     'HTTP@moerbsen.grolmsnet.lan',
                                     GSSAPI::OID::gss_nt_hostbased_service);

display($tname);

converts the

GSSAPI

internal format into a humanreadable string and stores it into $tname.

output

humanreadable string will be stored into $tname.

return value

returns GSSAPI::Status Object

Example:

     my $tname;
     $status = $gssapinameobj->display($tname);
     die 'hmm, error...' if($status->major != GSS_S_COMPLETE );
     print "\n  Name is $tname";

compare( nameobj, ret)

Wraps gss_compare_name().

Input

nameobj: the 2nd GSSAPI::Name to be compared to

output

ret

value is non-zero: names refer to same entity
value is zero: names refer to different entities.

return value

returns GSSAPI::Status Object

EXPORT

  GSS_C_ACCEPT
  GSS_C_AF_APPLETALK
  GSS_C_AF_BSC
  GSS_C_AF_CCITT
  GSS_C_AF_CHAOS
  GSS_C_AF_DATAKIT
  GSS_C_AF_DECnet
  GSS_C_AF_DLI
  GSS_C_AF_DSS
  GSS_C_AF_ECMA
  GSS_C_AF_HYLINK
  GSS_C_AF_IMPLINK
  GSS_C_AF_INET
  GSS_C_AF_LAT
  GSS_C_AF_LOCAL
  GSS_C_AF_NBS
  GSS_C_AF_NS
  GSS_C_AF_NULLADDR
  GSS_C_AF_OSI
  GSS_C_AF_PUP
  GSS_C_AF_SNA
  GSS_C_AF_UNSPEC
  GSS_C_AF_X25
  GSS_C_ANON_FLAG
  GSS_C_BOTH
  GSS_C_CALLING_ERROR_MASK
  GSS_C_CALLING_ERROR_OFFSET
  GSS_C_CONF_FLAG
  GSS_C_DELEG_FLAG
  GSS_C_EMPTY_BUFFER
  GSS_C_GSS_CODE
  GSS_C_INDEFINITE
  GSS_C_INITIATE
  GSS_C_INTEG_FLAG
  GSS_C_MECH_CODE
  GSS_C_MUTUAL_FLAG
  GSS_C_NO_BUFFER
  GSS_C_NO_CHANNEL_BINDINGS
  GSS_C_NO_CONTEXT
  GSS_C_NO_CREDENTIAL
  GSS_C_NO_NAME
  GSS_C_NO_OID
  GSS_C_NO_OID_SET
  GSS_C_PROT_READY_FLAG
  GSS_C_QOP_DEFAULT
  GSS_C_REPLAY_FLAG
  GSS_C_ROUTINE_ERROR_MASK
  GSS_C_ROUTINE_ERROR_OFFSET
  GSS_C_SEQUENCE_FLAG
  GSS_C_SUPPLEMENTARY_MASK
  GSS_C_SUPPLEMENTARY_OFFSET
  GSS_C_TRANS_FLAG
  GSS_S_BAD_BINDINGS
  GSS_S_BAD_MECH
  GSS_S_BAD_NAME
  GSS_S_BAD_NAMETYPE
  GSS_S_BAD_QOP
  GSS_S_BAD_SIG
  GSS_S_BAD_STATUS
  GSS_S_CALL_BAD_STRUCTURE
  GSS_S_CALL_INACCESSIBLE_READ
  GSS_S_CALL_INACCESSIBLE_WRITE
  GSS_S_COMPLETE
  GSS_S_CONTEXT_EXPIRED
  GSS_S_CONTINUE_NEEDED
  GSS_S_CREDENTIALS_EXPIRED
  GSS_S_CRED_UNAVAIL
  GSS_S_DEFECTIVE_CREDENTIAL
  GSS_S_DEFECTIVE_TOKEN
  GSS_S_DUPLICATE_ELEMENT
  GSS_S_DUPLICATE_TOKEN
  GSS_S_FAILURE
  GSS_S_GAP_TOKEN
  GSS_S_NAME_NOT_MN
  GSS_S_NO_CONTEXT
  GSS_S_NO_CRED
  GSS_S_OLD_TOKEN
  GSS_S_UNAUTHORIZED
  GSS_S_UNAVAILABLE
  GSS_S_UNSEQ_TOKEN

Exportable functions

    $status = indicate_mechs($oidset)

Example

   use GSSAPI qw(:all);

   my $oidset;
   my $isin = 0;

   my $status = indicate_mechs( $oidset );
   $status->major == GSS_S_COMPLETE || die 'error';

   $status = $oidset->contains( gss_mech_krb5_old, $isin );
   $status->major == GSS_S_COMPLETE || die 'error';

   if ( $isin ) {
     print 'Support of Kerberos 5 old mechtype';
   } else {
     print 'No Support of Kerberos 5 old mechtype';
   }

Constant OIDs provided:

    # Constant OIDs provided:
    $oid = gss_nt_user_name;
    $oid = gss_nt_machine_uid_name;
    $oid = gss_nt_string_uid_name;
    $oid = gss_nt_service_name;
    $oid = gss_nt_exported_name;
    $oid = gss_nt_service_name_v2;
    $oid = gss_nt_krb5_name;
    $oid = gss_nt_krb5_principal;
    $oid = gss_mech_krb5;
    $oid = gss_mech_krb5_old;
    $oid = gss_mech_spnego;

All other functions are class or instance methods.

BUGS

More documentation how to use the module has to be added.

SUPPORT

See our project home at <perlgssapi.sourceforge.net>

Mailinglist perlgssapi-users@lists.sourceforge.net

AUTHOR

The module ist maintained by Achim Grolms <perl@grolmsnet.de>

originally written by Philip Guenther <pguen@cpan.org>

THANKS TO

Philip Guenther
Leif Johansson
Merijn Broeren
Harald Joerg
Christopher Odenbach
Dax Kelson
Marc Lehmann
David Leonard
Florian Ragwitz: maintainer of Debian package
Markus Moeller: Solaris 10 / OpenSolaris support

GSSAPI • man page

GSSAPI • man page

GSSAPI (3)

Leading comments

NAME

SYNOPSIS

DESCRIPTION

USAGE

GSSAPI::Name

EXPORT

Exportable functions

SEE ALSO

BUGS

SUPPORT

AUTHOR

THANKS TO

COPYRIGHT

Man Section

extra • Version

extra • Source

extra • Book

References