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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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96
lib/gssapi/mech/gss_acquire_cred_with_password.c
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@@ -43,77 +43,43 @@ gss_acquire_cred_with_password(OM_uint32 *minor_status,
gss_OID_set *actual_mechs,
OM_uint32 *time_rec)
{
OM_uint32 major_status, tmp_minor;
OM_uint32 major_status;
gss_key_value_element_desc kv;
gss_key_value_set_desc store;
char *spassword = NULL;
if (desired_mechs == GSS_C_NO_OID_SET) {
major_status = _gss_acquire_cred_ext(minor_status,
desired_name,
GSS_C_CRED_PASSWORD,
password,
time_req,
GSS_C_NO_OID,
cred_usage,
output_cred_handle);
if (GSS_ERROR(major_status))
return major_status;
} else {
size_t i;
struct _gss_cred *new_cred;
*output_cred_handle = GSS_C_NO_CREDENTIAL;
new_cred = calloc(1, sizeof(*new_cred));
if (new_cred == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
HEIM_SLIST_INIT(&new_cred->gc_mc);
if (password == GSS_C_NO_BUFFER || password->value == NULL)
return GSS_S_CALL_INACCESSIBLE_READ;
for (i = 0; i < desired_mechs->count; i++) {
struct _gss_cred *tmp_cred = NULL;
struct _gss_mechanism_cred *mc;
spassword = malloc(password->length + 1);
if (spassword == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
memcpy(spassword, password->value, password->length);
spassword[password->length] = '\0';
major_status = _gss_acquire_cred_ext(minor_status,
desired_name,
GSS_C_CRED_PASSWORD,
password,
time_req,
&desired_mechs->elements[i],
cred_usage,
(gss_cred_id_t *)&tmp_cred);
if (GSS_ERROR(major_status))
continue;
kv.key = "password";
kv.value = spassword;
mc = HEIM_SLIST_FIRST(&tmp_cred->gc_mc);
if (mc) {
HEIM_SLIST_REMOVE_HEAD(&tmp_cred->gc_mc, gmc_link);
HEIM_SLIST_INSERT_HEAD(&new_cred->gc_mc, mc, gmc_link);
}
store.count = 1;
store.elements = &kv;
gss_release_cred(&tmp_minor, (gss_cred_id_t *)&tmp_cred);
}
if (!HEIM_SLIST_FIRST(&new_cred->gc_mc)) {
free(new_cred);
if (desired_mechs->count > 1)
*minor_status = 0;
return GSS_S_NO_CRED;
}
*output_cred_handle = (gss_cred_id_t)new_cred;
major_status = gss_acquire_cred_from(minor_status,
desired_name,
time_req,
desired_mechs,
cred_usage,
&store,
output_cred_handle,
actual_mechs,
time_rec);
if (spassword) {
memset_s(spassword, password->length, 0, password->length);
free(spassword);
}
if (actual_mechs != NULL || time_rec != NULL) {
major_status = gss_inquire_cred(minor_status,
*output_cred_handle,
NULL,
time_rec,
NULL,
actual_mechs);
if (GSS_ERROR(major_status)) {
gss_release_cred(&tmp_minor, output_cred_handle);
return major_status;
}
}
*minor_status = 0;
return GSS_S_COMPLETE;
return major_status;
}