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/* Copyright (C) 2012 the GSS-PROXY contributors, see COPYING for license */
#include "gss_plugin.h"
static OM_uint32 acquire_local(OM_uint32 *minor_status,
struct gpp_cred_handle *imp_cred_handle,
struct gpp_name_handle *name,
OM_uint32 time_req,
const gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage,
struct gpp_cred_handle *out_cred_handle,
gss_OID_set *actual_mechs,
OM_uint32 *time_rec)
{
gss_OID_set special_mechs = GSS_C_NO_OID_SET;
OM_uint32 maj, min;
special_mechs = gpp_special_available_mechs(desired_mechs);
if (special_mechs == GSS_C_NO_OID_SET) {
maj = GSS_S_BAD_MECH;
min = 0;
goto done;
}
if (name && name->remote && !name->local) {
maj = gpp_name_to_local(&min, name->remote,
name->mech_type, &name->local);
if (maj) {
goto done;
}
}
if (imp_cred_handle) {
maj = gss_acquire_cred_impersonate_name(&min,
imp_cred_handle->local,
name ? name->local : NULL,
time_req,
special_mechs,
cred_usage,
&out_cred_handle->local,
actual_mechs,
time_rec);
goto done;
}
maj = gss_acquire_cred(&min,
name ? name->local : NULL,
time_req,
special_mechs,
cred_usage,
&out_cred_handle->local,
actual_mechs,
time_rec);
done:
*minor_status = min;
(void)gss_release_oid_set(&min, &special_mechs);
return maj;
}
OM_uint32 gssi_acquire_cred(OM_uint32 *minor_status,
const gss_name_t desired_name,
OM_uint32 time_req,
const gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage,
gss_cred_id_t *output_cred_handle,
gss_OID_set *actual_mechs,
OM_uint32 *time_rec)
{
enum gpp_behavior behavior;
struct gpp_name_handle *name;
struct gpp_cred_handle *out_cred_handle = NULL;
OM_uint32 maj, min;
OM_uint32 tmaj, tmin;
GSSI_TRACE();
if (!output_cred_handle) {
*minor_status = gpp_map_error(EINVAL);
return GSS_S_FAILURE;
}
tmaj = GSS_S_COMPLETE;
tmin = 0;
out_cred_handle = calloc(1, sizeof(struct gpp_cred_handle));
if (!out_cred_handle) {
maj = GSS_S_FAILURE;
min = ENOMEM;
goto done;
}
name = (struct gpp_name_handle *)desired_name;
behavior = gpp_get_behavior();
/* See if we should try local first */
if (behavior == GPP_LOCAL_ONLY || behavior == GPP_LOCAL_FIRST) {
maj = acquire_local(&min, NULL, name,
time_req, desired_mechs, cred_usage,
out_cred_handle, actual_mechs, time_rec);
if (maj == GSS_S_COMPLETE || behavior == GPP_LOCAL_ONLY) {
goto done;
}
/* not successful, save actual local error if remote fallback fails */
tmaj = maj;
tmin = min;
}
/* Then try with remote */
if (name && name->local && !name->remote) {
maj = gpp_local_to_name(&min, name->local, &name->remote);
if (maj) {
goto done;
}
}
maj = gpm_acquire_cred(&min, NULL,
name ? name->remote : NULL,
time_req,
desired_mechs,
cred_usage, false,
&out_cred_handle->remote,
actual_mechs,
time_rec);
if (maj == GSS_S_COMPLETE || behavior == GPP_REMOTE_ONLY) {
goto done;
}
if (behavior == GPP_REMOTE_FIRST) {
/* So remote failed, but we can fallback to local, try that */
maj = acquire_local(&min, NULL, name,
time_req, desired_mechs, cred_usage,
out_cred_handle, actual_mechs, time_rec);
}
done:
if (maj != GSS_S_COMPLETE &&
maj != GSS_S_CONTINUE_NEEDED &&
tmaj != GSS_S_COMPLETE) {
maj = tmaj;
min = tmin;
}
if (maj == GSS_S_COMPLETE) {
*output_cred_handle = (gss_cred_id_t)out_cred_handle;
} else {
free(out_cred_handle);
}
*minor_status = gpp_map_error(min);
return maj;
}
OM_uint32 gssi_add_cred(OM_uint32 *minor_status,
const gss_cred_id_t input_cred_handle,
const gss_name_t desired_name,
const gss_OID desired_mech,
gss_cred_usage_t cred_usage,
OM_uint32 initiator_time_req,
OM_uint32 acceptor_time_req,
gss_cred_id_t *output_cred_handle,
gss_OID_set *actual_mechs,
OM_uint32 *initiator_time_rec,
OM_uint32 *acceptor_time_rec)
{
gss_OID_set desired_mechs = GSS_C_NO_OID_SET;
OM_uint32 time_req, time_rec;
OM_uint32 maj, min;
GSSI_TRACE();
if (!output_cred_handle) {
return GSS_S_CALL_INACCESSIBLE_WRITE;
}
if (desired_mech) {
maj = gss_create_empty_oid_set(&min, &desired_mechs);
if (maj != GSS_S_COMPLETE) {
*minor_status = gpp_map_error(min);
return maj;
}
maj = gss_add_oid_set_member(&min, desired_mech, &desired_mechs);
if (maj != GSS_S_COMPLETE) {
(void)gss_release_oid_set(&min, &desired_mechs);
*minor_status = gpp_map_error(min);
return maj;
}
}
switch (cred_usage) {
case GSS_C_ACCEPT:
time_req = acceptor_time_req;
break;
case GSS_C_INITIATE:
time_req = initiator_time_req;
break;
case GSS_C_BOTH:
if (acceptor_time_req > initiator_time_req) {
time_req = acceptor_time_req;
} else {
time_req = initiator_time_req;
}
break;
default:
time_req = 0;
}
maj = gssi_acquire_cred(minor_status,
desired_name,
time_req,
desired_mechs,
cred_usage,
output_cred_handle,
actual_mechs,
&time_rec);
if (maj == GSS_S_COMPLETE) {
if (acceptor_time_rec &&
(cred_usage == GSS_C_ACCEPT || cred_usage == GSS_C_BOTH)) {
*acceptor_time_rec = time_rec;
}
if (initiator_time_rec &&
(cred_usage == GSS_C_INITIATE || cred_usage == GSS_C_BOTH)) {
*initiator_time_rec = time_rec;
}
}
(void)gss_release_oid_set(&min, &desired_mechs);
return maj;
}
OM_uint32 gssi_acquire_cred_with_password(OM_uint32 *minor_status,
const gss_name_t desired_name,
const gss_buffer_t password,
OM_uint32 time_req,
const gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage,
gss_cred_id_t *output_cred_handle,
gss_OID_set *actual_mechs,
OM_uint32 *time_rec)
{
enum gpp_behavior behavior;
struct gpp_name_handle *name;
struct gpp_cred_handle *out_cred_handle = NULL;
gss_OID_set special_mechs;
OM_uint32 maj, min;
GSSI_TRACE();
if (desired_name == GSS_C_NO_NAME) {
*minor_status = gpp_map_error(EINVAL);
return GSS_S_BAD_NAME;
}
name = (struct gpp_name_handle *)desired_name;
if (!output_cred_handle) {
*minor_status = gpp_map_error(EINVAL);
return GSS_S_FAILURE;
}
if (desired_mechs == GSS_C_NO_OID_SET) {
return GSS_S_CALL_INACCESSIBLE_READ;
}
behavior = gpp_get_behavior();
out_cred_handle = calloc(1, sizeof(struct gpp_cred_handle));
if (!out_cred_handle) {
*minor_status = gpp_map_error(ENOMEM);
return GSS_S_FAILURE;
}
switch (behavior) {
case GPP_LOCAL_ONLY:
case GPP_LOCAL_FIRST:
case GPP_REMOTE_FIRST:
/* re-enter the mechglue, using the special OIDs for skipping
* the use of the interposer */
special_mechs = gpp_special_available_mechs(desired_mechs);
if (special_mechs == GSS_C_NO_OID_SET) {
min = EINVAL;
maj = GSS_S_FAILURE;
goto done;
}
if (name->remote && !name->local) {
maj = gpp_name_to_local(&min, name->remote,
name->mech_type, &name->local);
if (maj) {
goto done;
}
}
maj = gss_acquire_cred_with_password(&min,
name->local,
password,
time_req,
special_mechs,
cred_usage,
&out_cred_handle->local,
actual_mechs,
time_rec);
break;
/* fall through if we got no creds locally and we are in
* automatic mode */
case GPP_REMOTE_ONLY:
/* FIXME: not currently available */
/* fall through for now */
default:
maj = GSS_S_FAILURE;
min = EINVAL;
}
done:
if (maj == GSS_S_COMPLETE) {
*output_cred_handle = (gss_cred_id_t)out_cred_handle;
} else {
free(out_cred_handle);
}
*minor_status = gpp_map_error(min);
(void)gss_release_oid_set(&min, &special_mechs);
return maj;
}
OM_uint32 gssi_acquire_cred_impersonate_name(OM_uint32 *minor_status,
gss_cred_id_t *imp_cred_handle,
const gss_name_t desired_name,
OM_uint32 time_req,
const gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage,
gss_cred_id_t *output_cred_handle,
gss_OID_set *actual_mechs,
OM_uint32 *time_rec)
{
enum gpp_behavior behavior;
struct gpp_name_handle *name;
struct gpp_cred_handle *impersonator_cred_handle = NULL;
struct gpp_cred_handle *out_cred_handle = NULL;
OM_uint32 maj, min;
OM_uint32 tmaj, tmin;
GSSI_TRACE();
if (!imp_cred_handle) {
*minor_status = gpp_map_error(EINVAL);
return GSS_S_NO_CRED;
}
impersonator_cred_handle = (struct gpp_cred_handle *)imp_cred_handle;
if (!output_cred_handle) {
*minor_status = gpp_map_error(EINVAL);
return GSS_S_FAILURE;
}
tmaj = GSS_S_COMPLETE;
tmin = 0;
out_cred_handle = calloc(1, sizeof(struct gpp_cred_handle));
if (!out_cred_handle) {
maj = GSS_S_FAILURE;
min = ENOMEM;
goto done;
}
name = (struct gpp_name_handle *)desired_name;
behavior = gpp_get_behavior();
/* See if we should try local first */
if (behavior == GPP_LOCAL_ONLY || behavior == GPP_LOCAL_FIRST) {
maj = acquire_local(&min, impersonator_cred_handle, name,
time_req, desired_mechs, cred_usage,
out_cred_handle, actual_mechs, time_rec);
if (maj == GSS_S_COMPLETE || behavior == GPP_LOCAL_ONLY) {
goto done;
}
/* not successful, save actual local error if remote fallback fails */
tmaj = maj;
tmin = min;
}
/* Then try with remote */
if (name && name->local && !name->remote) {
maj = gpp_local_to_name(&min, name->local, &name->remote);
if (maj) {
goto done;
}
}
maj = gpm_acquire_cred(&min,
impersonator_cred_handle->remote,
name ? name->remote : NULL,
time_req,
desired_mechs,
cred_usage,
true,
&out_cred_handle->remote,
actual_mechs,
time_rec);
if (maj == GSS_S_COMPLETE || behavior == GPP_REMOTE_ONLY) {
goto done;
}
if (behavior == GPP_REMOTE_FIRST) {
/* So remote failed, but we can fallback to local, try that */
maj = acquire_local(&min, impersonator_cred_handle, name,
time_req, desired_mechs, cred_usage,
out_cred_handle, actual_mechs, time_rec);
}
done:
if (maj != GSS_S_COMPLETE &&
maj != GSS_S_CONTINUE_NEEDED &&
tmaj != GSS_S_COMPLETE) {
maj = tmaj;
min = tmin;
}
if (maj == GSS_S_COMPLETE) {
*output_cred_handle = (gss_cred_id_t)out_cred_handle;
} else {
free(out_cred_handle);
}
*minor_status = gpp_map_error(min);
return maj;
}
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