cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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auth_none.c (3203B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <linux/ceph/ceph_debug.h>
      4
      5#include <linux/err.h>
      6#include <linux/module.h>
      7#include <linux/random.h>
      8#include <linux/slab.h>
      9
     10#include <linux/ceph/decode.h>
     11#include <linux/ceph/auth.h>
     12
     13#include "auth_none.h"
     14
     15static void reset(struct ceph_auth_client *ac)
     16{
     17	struct ceph_auth_none_info *xi = ac->private;
     18
     19	xi->starting = true;
     20}
     21
     22static void destroy(struct ceph_auth_client *ac)
     23{
     24	kfree(ac->private);
     25	ac->private = NULL;
     26}
     27
     28static int is_authenticated(struct ceph_auth_client *ac)
     29{
     30	struct ceph_auth_none_info *xi = ac->private;
     31
     32	return !xi->starting;
     33}
     34
     35static int should_authenticate(struct ceph_auth_client *ac)
     36{
     37	struct ceph_auth_none_info *xi = ac->private;
     38
     39	return xi->starting;
     40}
     41
     42static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac,
     43					   struct ceph_none_authorizer *au)
     44{
     45	void *p = au->buf;
     46	void *const end = p + sizeof(au->buf);
     47	int ret;
     48
     49	ceph_encode_8_safe(&p, end, 1, e_range);
     50	ret = ceph_auth_entity_name_encode(ac->name, &p, end);
     51	if (ret < 0)
     52		return ret;
     53
     54	ceph_encode_64_safe(&p, end, ac->global_id, e_range);
     55	au->buf_len = p - (void *)au->buf;
     56	dout("%s built authorizer len %d\n", __func__, au->buf_len);
     57	return 0;
     58
     59e_range:
     60	return -ERANGE;
     61}
     62
     63static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
     64{
     65	return 0;
     66}
     67
     68/*
     69 * the generic auth code decode the global_id, and we carry no actual
     70 * authenticate state, so nothing happens here.
     71 */
     72static int handle_reply(struct ceph_auth_client *ac, u64 global_id,
     73			void *buf, void *end, u8 *session_key,
     74			int *session_key_len, u8 *con_secret,
     75			int *con_secret_len)
     76{
     77	struct ceph_auth_none_info *xi = ac->private;
     78
     79	xi->starting = false;
     80	ceph_auth_set_global_id(ac, global_id);
     81	return 0;
     82}
     83
     84static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
     85{
     86	kfree(a);
     87}
     88
     89/*
     90 * build an 'authorizer' with our entity_name and global_id.  it is
     91 * identical for all services we connect to.
     92 */
     93static int ceph_auth_none_create_authorizer(
     94	struct ceph_auth_client *ac, int peer_type,
     95	struct ceph_auth_handshake *auth)
     96{
     97	struct ceph_none_authorizer *au;
     98	int ret;
     99
    100	au = kmalloc(sizeof(*au), GFP_NOFS);
    101	if (!au)
    102		return -ENOMEM;
    103
    104	au->base.destroy = ceph_auth_none_destroy_authorizer;
    105
    106	ret = ceph_auth_none_build_authorizer(ac, au);
    107	if (ret) {
    108		kfree(au);
    109		return ret;
    110	}
    111
    112	auth->authorizer = (struct ceph_authorizer *) au;
    113	auth->authorizer_buf = au->buf;
    114	auth->authorizer_buf_len = au->buf_len;
    115	auth->authorizer_reply_buf = NULL;
    116	auth->authorizer_reply_buf_len = 0;
    117
    118	return 0;
    119}
    120
    121static const struct ceph_auth_client_ops ceph_auth_none_ops = {
    122	.reset = reset,
    123	.destroy = destroy,
    124	.is_authenticated = is_authenticated,
    125	.should_authenticate = should_authenticate,
    126	.build_request = build_request,
    127	.handle_reply = handle_reply,
    128	.create_authorizer = ceph_auth_none_create_authorizer,
    129};
    130
    131int ceph_auth_none_init(struct ceph_auth_client *ac)
    132{
    133	struct ceph_auth_none_info *xi;
    134
    135	dout("ceph_auth_none_init %p\n", ac);
    136	xi = kzalloc(sizeof(*xi), GFP_NOFS);
    137	if (!xi)
    138		return -ENOMEM;
    139
    140	xi->starting = true;
    141
    142	ac->protocol = CEPH_AUTH_NONE;
    143	ac->private = xi;
    144	ac->ops = &ceph_auth_none_ops;
    145	return 0;
    146}