#include <linux/ceph/ceph_debug.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/messenger.h>
#include "crypto.h"
#include "auth_x.h"
#include "auth_x_protocol.h"
static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);
static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
{
struct ceph_x_info *xi = ac->private;
int need;
ceph_x_validate_tickets(ac, &need);
dout("ceph_x_is_authenticated want=%d need=%d have=%d\n",
ac->want_keys, need, xi->have_keys);
return (ac->want_keys & xi->have_keys) == ac->want_keys;
}
static int ceph_x_should_authenticate(struct ceph_auth_client *ac)
{
struct ceph_x_info *xi = ac->private;
int need;
ceph_x_validate_tickets(ac, &need);
dout("ceph_x_should_authenticate want=%d need=%d have=%d\n",
ac->want_keys, need, xi->have_keys);
return need != 0;
}
static int ceph_x_encrypt_offset(void)
{
return sizeof(u32) + sizeof(struct ceph_x_encrypt_header);
}
static int ceph_x_encrypt_buflen(int ilen)
{
return ceph_x_encrypt_offset() + ilen + 16;
}
static int ceph_x_encrypt(struct ceph_crypto_key *secret, void *buf,
int buf_len, int plaintext_len)
{
struct ceph_x_encrypt_header *hdr = buf + sizeof(u32);
int ciphertext_len;
int ret;
hdr->struct_v = 1;
hdr->magic = cpu_to_le64(CEPHX_ENC_MAGIC);
ret = ceph_crypt(secret, true, buf + sizeof(u32), buf_len - sizeof(u32),
plaintext_len + sizeof(struct ceph_x_encrypt_header),
&ciphertext_len);
if (ret)
return ret;
ceph_encode_32(&buf, ciphertext_len);
return sizeof(u32) + ciphertext_len;
}
static int ceph_x_decrypt(struct ceph_crypto_key *secret, void **p, void *end)
{
struct ceph_x_encrypt_header *hdr = *p + sizeof(u32);
int ciphertext_len, plaintext_len;
int ret;
ceph_decode_32_safe(p, end, ciphertext_len, e_inval);
ceph_decode_need(p, end, ciphertext_len, e_inval);
ret = ceph_crypt(secret, false, *p, end - *p, ciphertext_len,
&plaintext_len);
if (ret)
return ret;
if (hdr->struct_v != 1 || le64_to_cpu(hdr->magic) != CEPHX_ENC_MAGIC)
return -EPERM;
*p += ciphertext_len;
return plaintext_len - sizeof(struct ceph_x_encrypt_header);
e_inval:
return -EINVAL;
}
/*
* get existing (or insert new) ticket handler
*/
static struct ceph_x_ticket_handler *
get_ticket_handler(struct ceph_auth_client *ac, int service)
{
struct ceph_x_ticket_handler *th;
struct ceph_x_info *xi = ac->private;
struct rb_node *parent = NULL, **p = &xi->ticket_handlers.rb_node;
while (*p) {
parent = *p;
th = rb_entry(parent, struct ceph_x_ticket_handler, node);
if (service < th->service)
p = &(*p)->rb_left;
else if (service > th->service)
p = &(*p)->rb_right;
else
return th;
}
/* add it */
th = kzalloc(sizeof(*th), GFP_NOFS);
if (!th)
return ERR_PTR(-ENOMEM);
th->service = service;
rb_link_node(&th->node, parent, p);
rb_insert_color(&th->node, &xi->ticket_handlers);
return th;
}
static void remove_ticket_handler(struct ceph_auth_client *ac,
struct ceph_x_ticket_handler *th)
{
struct ceph_x_info *xi = ac->private;
dout("remove_ticket_handler %p %d\n", th, th->service);
rb_erase(&th->node, &xi->ticket_handlers);
ceph_crypto_key_destroy(&th->session_key);
if (th->ticket_blob)
ceph_buffer_put(th->ticket_blob);
kfree(th);
}
static int process_one_ticket(struct ceph_auth_client *ac,
struct ceph_crypto_key *secret,
void **p, void *end)
{
struct ceph_x_info *xi = ac->private;
int type;
u8 tkt_struct_v, blob_struct_v;
struct ceph_x_ticket_handler *th;
void *dp, *dend;
int dlen;
char is_enc;
struct timespec validity;
void *tp, *tpend;
void **ptp;
struct ceph_crypto_key new_session_key;
struct ceph_buffer *new_ticket_blob;
unsigned long new_expires, new_renew_after;