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GSSAPI (3) \| C library functions \| Unix Manual Pages \| :man▋ NAME gssapi - Generic Security Service Application Program Interface library CONTENTS Library Description List Of Functions Compatibility Bugs See Also LIBRARY GSS-API Library (libgssapi, -lgssapi) DESCRIPTION The Generic Security Service Application Program Interface (GSS-API) provides security services to callers in a generic fashion, supportable with a range of underlying mechanisms and technologies and hence allowing source-level portability of applications to different environments. LIST OF FUNCTIONS These functions constitute the gssapi library, libgssapi. Declarations for these functions may be obtained from the include file `gssapi.h`. Name/Page Description gss_accept_sec_context.3 gss_acquire_cred.3 gss_add_cred.3 gss_add_oid_set_member.3 gss_canonicalize_name.3 gss_compare_name.3 gss_context_time.3 gss_create_empty_oid_set.3 gss_delete_sec_context.3 gss_display_name.3 gss_display_status.3 gss_duplicate_name.3 gss_export_name.3 gss_export_sec_context.3 gss_get_mic.3 gss_import_name.3 gss_import_sec_context.3 gss_indicate_mechs.3 gss_init_sec_context.3 gss_inquire_context.3 gss_inquire_cred.3 gss_inquire_cred_by_mech.3 gss_inquire_mechs_for_name.3 gss_inquire_names_for_mech.3 gss_krb5_copy_ccache.3 gss_process_context_token.3 gss_release_buffer.3 gss_release_cred.3 gss_release_name.3 gss_release_oid_set.3 gss_seal.3 gss_sign.3 gss_test_oid_set_member.3 gss_unseal.3 gss_unwrap.3 gss_verify.3 gss_verify_mic.3 gss_wrap.3 gss_wrap_size_limit.3 .Fi COMPATIBILITY The Heimdal GSS-API implementation had a bug in releases before 0.6 that made it fail to inter-operate when using DES3 with other GSS-API implementations when using `gss_get_mic` / `gss_verify_mic`. Its possible to modify the behavior of the generator of the MIC with the `krb5.conf` configuration file so that old clients/servers will still work. New clients/servers will try both the old and new MIC in Heimdal 0.6. In 0.7 it will check only if configured and the compatibility code will be removed in 0.8. Heimdal 0.6 still generates by default the broken GSS-API DES3 mic, this will change in 0.7 to generate correct des3 mic. To turn on compatibility with older clients and servers, change the [gssapi] broken_des3_mic in `krb5.conf` that contains a list of globbing expressions that will be matched against the server name. To turn off generation of the old (incompatible) mic of the MIC use [gssapi] correct_des3_mic. If a match for a entry is in both [gssapi] correct_des3_mic and [gssapi] correct_des3_mic, the later will override. This config option modifies behaviour for both clients and servers. Example: [gssapi] broken_des3_mic = cvs/@SU.SE broken_des3_mic = host/@E.KTH.SE correct_des3_mic = host/@SU.SE BUGS All of 0.5.x versions of heimdal* had broken token delegations in the client side, the server side was correct. SEE ALSO krb5(3), krb5.conf(5), kerberos(8)

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