1.\" Copyright (c) 2003 Kungliga Tekniska H�gskolan 2.\" (Royal Institute of Technology, Stockholm, Sweden). 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" 3. Neither the name of the Institute nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" $Id: gssapi.3,v 1.5.2.2 2003/04/30 09:56:26 lha Exp $ 33.\" 34.Dd January 23, 2003 35.Dt GSSAPI 3 36.Os 37.Sh NAME 38.Nm gssapi 39.Nd Generic Security Service Application Program Interface library 40.Sh LIBRARY 41GSS-API Library (libgssapi, -lgssapi) 42.Sh DESCRIPTION 43The Generic Security Service Application Program Interface (GSS-API) 44provides security services to callers in a generic fashion, 45supportable with a range of underlying mechanisms and technologies and 46hence allowing source-level portability of applications to different 47environments. 48.Sh LIST OF FUNCTIONS 49These functions constitute the gssapi library, 50.Em libgssapi . 51Declarations for these functions may be obtained from the include file 52.Pa gssapi.h . 53.sp 2 54.nf 55.ta \w'gss_inquire_names_for_mech'u+2n +\w'Description goes here'u 56\fIName/Page\fP \fIDescription\fP 57.ta \w'gss_inquire_names_for_mech'u+2n +\w'Description goes here'u+6nC 58.sp 5p 59gss_accept_sec_context.3 60gss_acquire_cred.3 61gss_add_cred.3 62gss_add_oid_set_member.3 63gss_canonicalize_name.3 64gss_compare_name.3 65gss_context_time.3 66gss_create_empty_oid_set.3 67gss_delete_sec_context.3 68gss_display_name.3 69gss_display_status.3 70gss_duplicate_name.3 71gss_export_name.3 72gss_export_sec_context.3 73gss_get_mic.3 74gss_import_name.3 75gss_import_sec_context.3 76gss_indicate_mechs.3 77gss_init_sec_context.3 78gss_inquire_context.3 79gss_inquire_cred.3 80gss_inquire_cred_by_mech.3 81gss_inquire_mechs_for_name.3 82gss_inquire_names_for_mech.3 83gss_krb5_copy_ccache.3 84gss_process_context_token.3 85gss_release_buffer.3 86gss_release_cred.3 87gss_release_name.3 88gss_release_oid_set.3 89gss_seal.3 90gss_sign.3 91gss_test_oid_set_member.3 92gss_unseal.3 93gss_unwrap.3 94gss_verify.3 95gss_verify_mic.3 96gss_wrap.3 97gss_wrap_size_limit.3 98.ta 99.Fi 100.Sh COMPATIBILITY 101The 102.Nm Heimdal 103GSS-API implementation had a bug in releases before 0.6 that made it 104fail to inter-operate when using DES3 with other GSS-API 105implementations when using 106.Fn gss_get_mic 107/ 108.Fn gss_verify_mic . 109Its possible to modify the behavior of the generator of the MIC with 110the 111.Pa krb5.conf 112configuration file so that old clients/servers will still 113work. 114.Pp 115New clients/servers will try both the old and new MIC in Heimdal 0.6. 116In 0.7 it will check only if configured and the compatibility code 117will be removed in 0.8. 118.Pp 119Heimdal 0.6 still generates by default the broken GSS-API DES3 mic, 120this will change in 0.7 to generate correct des3 mic. 121.Pp 122To turn on compatibility with older clients and servers, change the 123.Nm [gssapi] 124.Ar broken_des3_mic 125in 126.Pa krb5.conf 127that contains a list of globbing expressions that will be matched 128against the server name. 129To turn off generation of the old (incompatible) mic of the MIC use 130.Nm [gssapi] 131.Ar correct_des3_mic . 132.Pp 133If a match for a entry is in both 134.Nm [gssapi] 135.Ar correct_des3_mic 136and 137.Nm [gssapi] 138.Ar correct_des3_mic , 139the later will override. 140.Pp 141This config option modifies behaviour for both clients and servers. 142.Pp 143Example: 144.Bd -literal -offset indent 145[gssapi] 146 broken_des3_mic = cvs/*@SU.SE 147 broken_des3_mic = host/*@E.KTH.SE 148 correct_des3_mic = host/*@SU.SE 149.Ed 150.Sh BUGS 151All of 0.5.x versions of 152.Nm heimdal 153had broken token delegations in the client side, the server side was 154correct. 155.Sh SEE ALSO 156.Xr krb5 3 , 157.Xr krb5.conf 5 , 158.Xr kerberos 8 159