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gssapi: credential store extensions (#451)

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Implement the GSS-API credential store API extensions defined by MIT here:

https://k5wiki.kerberos.org/wiki/Projects/Credential_Store_extensions

Note: we kill off gss_acquire_cred_ext() here. This was never a public API,
although mechanisms could have implemented it and I briefly used it in my
BrowserID prototype mechanism. gss_acquire_cred_ext_from() occupies the place
in the dispatch table where gss_acquire_cred_ext() used to, but this structure
was never visible outside Heimdal (i.e. it is only used by internal
mechanisms);

(Mechanisms that need to accept arbitrary key/value dictionaries from
applications should now implement gss_acquire_cred_from().)
This commit is contained in:
Luke Howard
2019-01-03 09:26:41 +11:00
committed by Nico Williams
parent a7d42cdf6b
commit e0bb9c10ca
39 changed files with 1289 additions and 1054 deletions
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136
lib/gssapi/mech/gss_acquire_cred.c
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@@ -38,131 +38,13 @@ gss_acquire_cred(OM_uint32 *minor_status,
gss_OID_set *actual_mechs,
OM_uint32 *time_rec)
{
OM_uint32 major_status;
gss_OID_set mechs = desired_mechs;
gss_OID_set_desc set;
struct _gss_name *name = (struct _gss_name *) desired_name;
gssapi_mech_interface m;
struct _gss_cred *cred;
struct _gss_mechanism_cred *mc;
OM_uint32 min_time, cred_time;
size_t i;
*minor_status = 0;
if (output_cred_handle == NULL)
return GSS_S_CALL_INACCESSIBLE_READ;
if (actual_mechs)
*actual_mechs = GSS_C_NO_OID_SET;
if (time_rec)
*time_rec = 0;
_gss_load_mech();
/*
* First make sure that at least one of the requested
* mechanisms is one that we support.
*/
if (mechs) {
for (i = 0; i < mechs->count; i++) {
int t;
gss_test_oid_set_member(minor_status,
&mechs->elements[i], _gss_mech_oids, &t);
if (t)
break;
}
if (i == mechs->count) {
*minor_status = 0;
return (GSS_S_BAD_MECH);
}
}
if (actual_mechs) {
major_status = gss_create_empty_oid_set(minor_status,
actual_mechs);
if (major_status)
return (major_status);
}
cred = malloc(sizeof(struct _gss_cred));
if (!cred) {
if (actual_mechs)
gss_release_oid_set(minor_status, actual_mechs);
*minor_status = ENOMEM;
return (GSS_S_FAILURE);
}
HEIM_SLIST_INIT(&cred->gc_mc);
if (mechs == GSS_C_NO_OID_SET)
mechs = _gss_mech_oids;
set.count = 1;
min_time = GSS_C_INDEFINITE;
for (i = 0; i < mechs->count; i++) {
struct _gss_mechanism_name *mn = NULL;
m = __gss_get_mechanism(&mechs->elements[i]);
if (!m)
continue;
if (desired_name != GSS_C_NO_NAME) {
major_status = _gss_find_mn(minor_status, name,
&mechs->elements[i], &mn);
if (major_status != GSS_S_COMPLETE)
continue;
}
mc = malloc(sizeof(struct _gss_mechanism_cred));
if (!mc) {
continue;
}
mc->gmc_mech = m;
mc->gmc_mech_oid = &m->gm_mech_oid;
/*
* XXX Probably need to do something with actual_mechs.
*/
set.elements = &mechs->elements[i];
major_status = m->gm_acquire_cred(minor_status,
(desired_name != GSS_C_NO_NAME
? mn->gmn_name : GSS_C_NO_NAME),
time_req, &set, cred_usage,
&mc->gmc_cred, NULL, &cred_time);
if (major_status) {
free(mc);
continue;
}
if (cred_time < min_time)
min_time = cred_time;
if (actual_mechs) {
major_status = gss_add_oid_set_member(minor_status,
mc->gmc_mech_oid, actual_mechs);
if (major_status) {
m->gm_release_cred(minor_status,
&mc->gmc_cred);
free(mc);
continue;
}
}
HEIM_SLIST_INSERT_HEAD(&cred->gc_mc, mc, gmc_link);
}
/*
* If we didn't manage to create a single credential, return
* an error.
*/
if (!HEIM_SLIST_FIRST(&cred->gc_mc)) {
free(cred);
if (actual_mechs)
gss_release_oid_set(minor_status, actual_mechs);
*minor_status = 0;
return (GSS_S_NO_CRED);
}
if (time_rec)
*time_rec = min_time;
*output_cred_handle = (gss_cred_id_t) cred;
*minor_status = 0;
return (GSS_S_COMPLETE);
return gss_acquire_cred_from(minor_status,
desired_name,
time_req,
desired_mechs,
cred_usage,
GSS_C_NO_CRED_STORE,
output_cred_handle,
actual_mechs,
time_rec);
}