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gssapi: refactor gss_duplicate_cred()

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Refactor gss_duplicate_cred() to consolidate branches in copy_cred_element()
and eliminate use of GSS_S_UNAVAILABLE sentinel
This commit is contained in:
Luke Howard
2019-01-04 18:07:41 +11:00
parent b025f20eb4
commit 178588516d
1 changed files with 38 additions and 50 deletions
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88
lib/gssapi/mech/gss_duplicate_cred.c
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@@ -37,7 +37,6 @@ copy_cred_element(OM_uint32 *minor_status,
{
gssapi_mech_interface m = mc->gmc_mech;
OM_uint32 major_status, tmp;
struct _gss_mechanism_name mn;
struct _gss_mechanism_cred *new_mc;
OM_uint32 initiator_lifetime, acceptor_lifetime;
gss_cred_usage_t cred_usage;
@@ -54,59 +53,49 @@ copy_cred_element(OM_uint32 *minor_status,
major_status = m->gm_import_cred(minor_status, &export, &dup_cred);
gss_release_buffer(&tmp, &export);
}
} else
major_status = GSS_S_UNAVAILABLE;
} else {
struct _gss_mechanism_name mn;
if (major_status != GSS_S_UNAVAILABLE) {
if (dup_cred != GSS_C_NO_CREDENTIAL) {
new_mc = calloc(1, sizeof(*new_mc));
if (new_mc == NULL) {
*minor_status = ENOMEM;
m->gm_release_cred(&tmp, &dup_cred);
return GSS_S_FAILURE;
}
mn.gmn_mech = m;
mn.gmn_mech_oid = mc->gmc_mech_oid;
mn.gmn_name = GSS_C_NO_NAME;
new_mc->gmc_mech = m;
new_mc->gmc_mech_oid = mc->gmc_mech_oid;
new_mc->gmc_cred = dup_cred;
/* This path won't work for ephemeral creds or cred stores */
major_status = m->gm_inquire_cred_by_mech(minor_status, mc->gmc_cred,
mc->gmc_mech_oid, &mn.gmn_name,
&initiator_lifetime,
&acceptor_lifetime, &cred_usage);
if (major_status == GSS_S_COMPLETE) {
major_status = _gss_mg_add_mech_cred(minor_status,
m,
NULL, /* mc */
&mn,
cred_usage,
initiator_lifetime,
acceptor_lifetime,
GSS_C_NO_CRED_STORE,
&new_mc,
NULL,
NULL);
m->gm_release_name(&tmp, &mn.gmn_name);
}
}
*out = new_mc;
if (major_status == GSS_S_COMPLETE) {
new_mc = calloc(1, sizeof(*new_mc));
if (new_mc == NULL) {
*minor_status = ENOMEM;
m->gm_release_cred(&tmp, &dup_cred);
return GSS_S_FAILURE;
}
return major_status;
}
new_mc->gmc_mech = m;
new_mc->gmc_mech_oid = mc->gmc_mech_oid;
new_mc->gmc_cred = dup_cred;
mn.gmn_mech = m;
mn.gmn_mech_oid = mc->gmc_mech_oid;
mn.gmn_name = GSS_C_NO_NAME;
/* This path won't work for ephemeral creds or cred stores */
major_status = m->gm_inquire_cred_by_mech(minor_status, mc->gmc_cred,
mc->gmc_mech_oid, &mn.gmn_name,
&initiator_lifetime,
&acceptor_lifetime, &cred_usage);
if (major_status) {
*out = new_mc;
} else
_gss_mg_error(m, *minor_status);
return major_status;
}
major_status = _gss_mg_add_mech_cred(minor_status,
m,
NULL, /* mc */
&mn,
cred_usage,
initiator_lifetime,
acceptor_lifetime,
GSS_C_NO_CRED_STORE,
&new_mc,
NULL,
NULL);
if (major_status)
_gss_mg_error(m, *minor_status);
m->gm_release_name(&tmp, &mn.gmn_name);
*out = new_mc;
return major_status;
}
@@ -143,10 +132,9 @@ gss_duplicate_cred(OM_uint32 *minor_status,
HEIM_SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
major_status = copy_cred_element(minor_status, mc, &copy_mc);
if (major_status != GSS_S_COMPLETE) {
_gss_mg_error(mc->gmc_mech, *minor_status);
if (major_status != GSS_S_COMPLETE)
break;
}
HEIM_SLIST_INSERT_HEAD(&new_cred->gc_mc, copy_mc, gmc_link);
}