[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ceph / auth_x.c


#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 "crypto.h"
#include "auth_x.h"
#include "auth_x_protocol.h"

#define TEMP_TICKET_BUF_LEN	256

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_buflen(int ilen)
{
	return sizeof(struct ceph_x_encrypt_header) + ilen + 16 +
		sizeof(u32);
}

static int ceph_x_encrypt(struct ceph_crypto_key *secret,
			  void *ibuf, int ilen, void *obuf, size_t olen)
{
	struct ceph_x_encrypt_header head = {
		.struct_v = 1,
		.magic = cpu_to_le64(CEPHX_ENC_MAGIC)
	};
	size_t len = olen - sizeof(u32);
	int ret;

	ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len,
			    &head, sizeof(head), ibuf, ilen);
	if (ret)
		return ret;
	ceph_encode_32(&obuf, len);
	return len + sizeof(u32);
}

static int ceph_x_decrypt(struct ceph_crypto_key *secret,
			  void **p, void *end, void *obuf, size_t olen)
{
	struct ceph_x_encrypt_header head;
	size_t head_len = sizeof(head);
	int len, ret;

	len = ceph_decode_32(p);
	if (*p + len > end)
		return -EINVAL;

	dout("ceph_x_decrypt len %d\n", len);
	ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen,
			    *p, len);
	if (ret)
		return ret;
	if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC)
		return -EPERM;
	*p += len;
	return olen;
}

/*
 * 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,
			      void *dbuf, void *ticket_buf)
{
	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;
	struct ceph_crypto_key old_key;
	void *tp, *tpend;
	struct ceph_timespec new_validity;
	struct ceph_crypto_key new_session_key;
	struct ceph_buffer *new_ticket_blob;
	unsigned long new_expires, new_renew_after;
	u64 new_secret_id;
	int ret;

	ceph_decode_need(p, end, sizeof(u32) + 1, bad);

	type = ceph_decode_32(p);
	dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));

	tkt_struct_v = ceph_decode_8(p);
	if (tkt_struct_v != 1)
		goto bad;

	th = get_ticket_handler(ac, type);
	if (IS_ERR(th)) {
		ret = PTR_ERR(th);
		goto out;
	}

	/* blob for me */
	dlen = ceph_x_decrypt(secret, p, end, dbuf,
			      TEMP_TICKET_BUF_LEN);
	if (dlen <= 0) {
		ret = dlen;
		goto out;
	}
	dout(" decrypted %d bytes\n", dlen);
	dp = dbuf;
	dend = dp + dlen;

	tkt_struct_v = ceph_decode_8(&dp);
	if (tkt_struct_v != 1)
		goto bad;

	memcpy(&old_key, &th->session_key, sizeof(old_key));
	ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
	if (ret)
		goto out;

	ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
	ceph_decode_timespec(&validity, &new_validity);
	new_expires = get_seconds() + validity.tv_sec;
	new_renew_after = new_expires - (validity.tv_sec / 4);
	dout(" expires=%lu renew_after=%lu\n", new_expires,
	     new_renew_after);

	/* ticket blob for service */
	ceph_decode_8_safe(p, end, is_enc, bad);
	tp = ticket_buf;
	if (is_enc) {
		/* encrypted */
		dout(" encrypted ticket\n");
		dlen = ceph_x_decrypt(&old_key, p, end, ticket_buf,
				      TEMP_TICKET_BUF_LEN);
		if (dlen < 0) {
			ret = dlen;
			goto out;
		}
		dlen = ceph_decode_32(&tp);
	} else {
		/* unencrypted */
		ceph_decode_32_safe(p, end, dlen, bad);
		ceph_decode_need(p, end, dlen, bad);
		ceph_decode_copy(p, ticket_buf, dlen);
	}
	tpend = tp + dlen;
	dout(" ticket blob is %d bytes\n", dlen);
	ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
	blob_struct_v = ceph_decode_8(&tp);
	new_secret_id = ceph_decode_64(&tp);
	ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
	if (ret)
		goto out;

	/* all is well, update our ticket */
	ceph_crypto_key_destroy(&th->session_key);
	if (th->ticket_blob)
		ceph_buffer_put(th->ticket_blob);
	th->session_key = new_session_key;
	th->ticket_blob = new_ticket_blob;
	th->validity = new_validity;
	th->secret_id = new_secret_id;
	th->expires = new_expires;
	th->renew_after = new_renew_after;
	dout(" got ticket service %d (%s) secret_id %lld len %d\n",
	     type, ceph_entity_type_name(type), th->secret_id,
	     (int)th->ticket_blob->vec.iov_len);
	xi->have_keys |= th->service;

out:
	return ret;

bad:
	ret = -EINVAL;
	goto out;
}

static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
				    struct ceph_crypto_key *secret,
				    void *buf, void *end)
{
	void *p = buf;
	char *dbuf;
	char *ticket_buf;
	u8 reply_struct_v;
	u32 num;
	int ret;

	dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
	if (!dbuf)
		return -ENOMEM;

	ret = -ENOMEM;
	ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
	if (!ticket_buf)
		goto out_dbuf;

	ceph_decode_8_safe(&p, end, reply_struct_v, bad);
	if (reply_struct_v != 1)
		return -EINVAL;

	ceph_decode_32_safe(&p, end, num, bad);
	dout("%d tickets\n", num);

	while (num--) {
		ret = process_one_ticket(ac, secret, &p, end,
					 dbuf, ticket_buf);
		if (ret)
			goto out;
	}

	ret = 0;
out:
	kfree(ticket_buf);
out_dbuf:
	kfree(dbuf);
	return ret;

bad:
	ret = -EINVAL;
	goto out;
}

static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
				   struct ceph_x_ticket_handler *th,
				   struct ceph_x_authorizer *au)
{
	int maxlen;
	struct ceph_x_authorize_a *msg_a;
	struct ceph_x_authorize_b msg_b;
	void *p, *end;
	int ret;
	int ticket_blob_len =
		(th->ticket_blob ? th->ticket_blob->vec.iov_len : 0);

	dout("build_authorizer for %s %p\n",
	     ceph_entity_type_name(th->service), au);

	maxlen = sizeof(*msg_a) + sizeof(msg_b) +
		ceph_x_encrypt_buflen(ticket_blob_len);
	dout("  need len %d\n", maxlen);
	if (au->buf && au->buf->alloc_len < maxlen) {
		ceph_buffer_put(au->buf);
		au->buf = NULL;
	}
	if (!au->buf) {
		au->buf = ceph_buffer_new(maxlen, GFP_NOFS);
		if (!au->buf)
			return -ENOMEM;
	}
	au->service = th->service;
	au->secret_id = th->secret_id;

	msg_a = au->buf->vec.iov_base;
	msg_a->struct_v = 1;
	msg_a->global_id = cpu_to_le64(ac->global_id);
	msg_a->service_id = cpu_to_le32(th->service);
	msg_a->ticket_blob.struct_v = 1;
	msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id);
	msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len);
	if (ticket_blob_len) {
		memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base,
		       th->ticket_blob->vec.iov_len);
	}
	dout(" th %p secret_id %lld %lld\n", th, th->secret_id,
	     le64_to_cpu(msg_a->ticket_blob.secret_id));

	p = msg_a + 1;
	p += ticket_blob_len;
	end = au->buf->vec.iov_base + au->buf->vec.iov_len;

	get_random_bytes(&au->nonce, sizeof(au->nonce));
	msg_b.struct_v = 1;
	msg_b.nonce = cpu_to_le64(au->nonce);
	ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b),
			     p, end - p);
	if (ret < 0)
		goto out_buf;
	p += ret;
	au->buf->vec.iov_len = p - au->buf->vec.iov_base;
	dout(" built authorizer nonce %llx len %d\n", au->nonce,
	     (int)au->buf->vec.iov_len);
	BUG_ON(au->buf->vec.iov_len > maxlen);
	return 0;

out_buf:
	ceph_buffer_put(au->buf);
	au->buf = NULL;
	return ret;
}

static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th,
				void **p, void *end)
{
	ceph_decode_need(p, end, 1 + sizeof(u64), bad);
	ceph_encode_8(p, 1);
	ceph_encode_64(p, th->secret_id);
	if (th->ticket_blob) {
		const char *buf = th->ticket_blob->vec.iov_base;
		u32 len = th->ticket_blob->vec.iov_len;

		ceph_encode_32_safe(p, end, len, bad);
		ceph_encode_copy_safe(p, end, buf, len, bad);
	} else {
		ceph_encode_32_safe(p, end, 0, bad);
	}

	return 0;
bad:
	return -ERANGE;
}

static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed)
{
	int want = ac->want_keys;
	struct ceph_x_info *xi = ac->private;
	int service;

	*pneed = ac->want_keys & ~(xi->have_keys);

	for (service = 1; service <= want; service <<= 1) {
		struct ceph_x_ticket_handler *th;

		if (!(ac->want_keys & service))
			continue;

		if (*pneed & service)
			continue;

		th = get_ticket_handler(ac, service);

		if (IS_ERR(th)) {
			*pneed |= service;
			continue;
		}

		if (get_seconds() >= th->renew_after)
			*pneed |= service;
		if (get_seconds() >= th->expires)
			xi->have_keys &= ~service;
	}
}


static int ceph_x_build_request(struct ceph_auth_client *ac,
				void *buf, void *end)
{
	struct ceph_x_info *xi = ac->private;
	int need;
	struct ceph_x_request_header *head = buf;
	int ret;
	struct ceph_x_ticket_handler *th =
		get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);

	if (IS_ERR(th))
		return PTR_ERR(th);

	ceph_x_validate_tickets(ac, &need);

	dout("build_request want %x have %x need %x\n",
	     ac->want_keys, xi->have_keys, need);

	if (need & CEPH_ENTITY_TYPE_AUTH) {
		struct ceph_x_authenticate *auth = (void *)(head + 1);
		void *p = auth + 1;
		struct ceph_x_challenge_blob tmp;
		char tmp_enc[40];
		u64 *u;

		if (p > end)
			return -ERANGE;

		dout(" get_auth_session_key\n");
		head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY);

		/* encrypt and hash */
		get_random_bytes(&auth->client_challenge, sizeof(u64));
		tmp.client_challenge = auth->client_challenge;
		tmp.server_challenge = cpu_to_le64(xi->server_challenge);
		ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp),
				     tmp_enc, sizeof(tmp_enc));
		if (ret < 0)
			return ret;

		auth->struct_v = 1;
		auth->key = 0;
		for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++)
			auth->key ^= *(__le64 *)u;
		dout(" server_challenge %llx client_challenge %llx key %llx\n",
		     xi->server_challenge, le64_to_cpu(auth->client_challenge),
		     le64_to_cpu(auth->key));

		/* now encode the old ticket if exists */
		ret = ceph_x_encode_ticket(th, &p, end);
		if (ret < 0)
			return ret;

		return p - buf;
	}

	if (need) {
		void *p = head + 1;
		struct ceph_x_service_ticket_request *req;

		if (p > end)
			return -ERANGE;
		head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY);

		ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer);
		if (ret)
			return ret;
		ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base,
				 xi->auth_authorizer.buf->vec.iov_len);

		req = p;
		req->keys = cpu_to_le32(need);
		p += sizeof(*req);
		return p - buf;
	}

	return 0;
}

static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
			       void *buf, void *end)
{
	struct ceph_x_info *xi = ac->private;
	struct ceph_x_reply_header *head = buf;
	struct ceph_x_ticket_handler *th;
	int len = end - buf;
	int op;
	int ret;

	if (result)
		return result;  /* XXX hmm? */

	if (xi->starting) {
		/* it's a hello */
		struct ceph_x_server_challenge *sc = buf;

		if (len != sizeof(*sc))
			return -EINVAL;
		xi->server_challenge = le64_to_cpu(sc->server_challenge);
		dout("handle_reply got server challenge %llx\n",
		     xi->server_challenge);
		xi->starting = false;
		xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH;
		return -EAGAIN;
	}

	op = le16_to_cpu(head->op);
	result = le32_to_cpu(head->result);
	dout("handle_reply op %d result %d\n", op, result);
	switch (op) {
	case CEPHX_GET_AUTH_SESSION_KEY:
		/* verify auth key */
		ret = ceph_x_proc_ticket_reply(ac, &xi->secret,
					       buf + sizeof(*head), end);
		break;

	case CEPHX_GET_PRINCIPAL_SESSION_KEY:
		th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
		if (IS_ERR(th))
			return PTR_ERR(th);
		ret = ceph_x_proc_ticket_reply(ac, &th->session_key,
					       buf + sizeof(*head), end);
		break;

	default:
		return -EINVAL;
	}
	if (ret)
		return ret;
	if (ac->want_keys == xi->have_keys)
		return 0;
	return -EAGAIN;
}

static int ceph_x_create_authorizer(
	struct ceph_auth_client *ac, int peer_type,
	struct ceph_auth_handshake *auth)
{
	struct ceph_x_authorizer *au;
	struct ceph_x_ticket_handler *th;
	int ret;

	th = get_ticket_handler(ac, peer_type);
	if (IS_ERR(th))
		return PTR_ERR(th);

	au = kzalloc(sizeof(*au), GFP_NOFS);
	if (!au)
		return -ENOMEM;

	ret = ceph_x_build_authorizer(ac, th, au);
	if (ret) {
		kfree(au);
		return ret;
	}

	auth->authorizer = (struct ceph_authorizer *) au;
	auth->authorizer_buf = au->buf->vec.iov_base;
	auth->authorizer_buf_len = au->buf->vec.iov_len;
	auth->authorizer_reply_buf = au->reply_buf;
	auth->authorizer_reply_buf_len = sizeof (au->reply_buf);

	return 0;
}

static int ceph_x_update_authorizer(
	struct ceph_auth_client *ac, int peer_type,
	struct ceph_auth_handshake *auth)
{
	struct ceph_x_authorizer *au;
	struct ceph_x_ticket_handler *th;

	th = get_ticket_handler(ac, peer_type);
	if (IS_ERR(th))
		return PTR_ERR(th);

	au = (struct ceph_x_authorizer *)auth->authorizer;
	if (au->secret_id < th->secret_id) {
		dout("ceph_x_update_authorizer service %u secret %llu < %llu\n",
		     au->service, au->secret_id, th->secret_id);
		return ceph_x_build_authorizer(ac, th, au);
	}
	return 0;
}

static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
					  struct ceph_authorizer *a, size_t len)
{
	struct ceph_x_authorizer *au = (void *)a;
	struct ceph_x_ticket_handler *th;
	int ret = 0;
	struct ceph_x_authorize_reply reply;
	void *p = au->reply_buf;
	void *end = p + sizeof(au->reply_buf);

	th = get_ticket_handler(ac, au->service);
	if (IS_ERR(th))
		return PTR_ERR(th);
	ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply));
	if (ret < 0)
		return ret;
	if (ret != sizeof(reply))
		return -EPERM;

	if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one))
		ret = -EPERM;
	else
		ret = 0;
	dout("verify_authorizer_reply nonce %llx got %llx ret %d\n",
	     au->nonce, le64_to_cpu(reply.nonce_plus_one), ret);
	return ret;
}

static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac,
				      struct ceph_authorizer *a)
{
	struct ceph_x_authorizer *au = (void *)a;

	ceph_buffer_put(au->buf);
	kfree(au);
}


static void ceph_x_reset(struct ceph_auth_client *ac)
{
	struct ceph_x_info *xi = ac->private;

	dout("reset\n");
	xi->starting = true;
	xi->server_challenge = 0;
}

static void ceph_x_destroy(struct ceph_auth_client *ac)
{
	struct ceph_x_info *xi = ac->private;
	struct rb_node *p;

	dout("ceph_x_destroy %p\n", ac);
	ceph_crypto_key_destroy(&xi->secret);

	while ((p = rb_first(&xi->ticket_handlers)) != NULL) {
		struct ceph_x_ticket_handler *th =
			rb_entry(p, struct ceph_x_ticket_handler, node);
		remove_ticket_handler(ac, th);
	}

	if (xi->auth_authorizer.buf)
		ceph_buffer_put(xi->auth_authorizer.buf);

	kfree(ac->private);
	ac->private = NULL;
}

static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
				   int peer_type)
{
	struct ceph_x_ticket_handler *th;

	th = get_ticket_handler(ac, peer_type);
	if (!IS_ERR(th))
		memset(&th->validity, 0, sizeof(th->validity));
}


static const struct ceph_auth_client_ops ceph_x_ops = {
	.name = "x",
	.is_authenticated = ceph_x_is_authenticated,
	.should_authenticate = ceph_x_should_authenticate,
	.build_request = ceph_x_build_request,
	.handle_reply = ceph_x_handle_reply,
	.create_authorizer = ceph_x_create_authorizer,
	.update_authorizer = ceph_x_update_authorizer,
	.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
	.destroy_authorizer = ceph_x_destroy_authorizer,
	.invalidate_authorizer = ceph_x_invalidate_authorizer,
	.reset =  ceph_x_reset,
	.destroy = ceph_x_destroy,
};


int ceph_x_init(struct ceph_auth_client *ac)
{
	struct ceph_x_info *xi;
	int ret;

	dout("ceph_x_init %p\n", ac);
	ret = -ENOMEM;
	xi = kzalloc(sizeof(*xi), GFP_NOFS);
	if (!xi)
		goto out;

	ret = -EINVAL;
	if (!ac->key) {
		pr_err("no secret set (for auth_x protocol)\n");
		goto out_nomem;
	}

	ret = ceph_crypto_key_clone(&xi->secret, ac->key);
	if (ret < 0) {
		pr_err("cannot clone key: %d\n", ret);
		goto out_nomem;
	}

	xi->starting = true;
	xi->ticket_handlers = RB_ROOT;

	ac->protocol = CEPH_AUTH_CEPHX;
	ac->private = xi;
	ac->ops = &ceph_x_ops;
	return 0;

out_nomem:
	kfree(xi);
out:
	return ret;
}
Commit	Line	Data
ec0994e4	1
3d14c5d2	2	#include <linux/ceph/ceph_debug.h>
ec0994e4 SW	3
	4	#include <linux/err.h>
	5	#include <linux/module.h>
	6	#include <linux/random.h>
5a0e3ad6	7	#include <linux/slab.h>
ec0994e4	8
3d14c5d2 YS	9	#include <linux/ceph/decode.h>
	10	#include <linux/ceph/auth.h>
	11
	12	#include "crypto.h"
ec0994e4 SW	13	#include "auth_x.h"
ec0994e4 SW	14	#include "auth_x_protocol.h"
ec0994e4	15
ec0994e4 SW	16	#define TEMP_TICKET_BUF_LEN 256
	17
	18	static void ceph_x_validate_tickets(struct ceph_auth_client ac, int pneed);
	19
	20	static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
	21	{
	22	struct ceph_x_info *xi = ac->private;
	23	int need;
	24
	25	ceph_x_validate_tickets(ac, &need);
	26	dout("ceph_x_is_authenticated want=%d need=%d have=%d\n",
	27	ac->want_keys, need, xi->have_keys);
	28	return (ac->want_keys & xi->have_keys) == ac->want_keys;
	29	}
	30
a41359fa SW	31	static int ceph_x_should_authenticate(struct ceph_auth_client *ac)
	32	{
	33	struct ceph_x_info *xi = ac->private;
	34	int need;
	35
	36	ceph_x_validate_tickets(ac, &need);
	37	dout("ceph_x_should_authenticate want=%d need=%d have=%d\n",
	38	ac->want_keys, need, xi->have_keys);
	39	return need != 0;
	40	}
	41
807c86e2 SW	42	static int ceph_x_encrypt_buflen(int ilen)
	43	{
	44	return sizeof(struct ceph_x_encrypt_header) + ilen + 16 +
	45	sizeof(u32);
	46	}
	47
ec0994e4 SW	48	static int ceph_x_encrypt(struct ceph_crypto_key *secret,
	49	void ibuf, int ilen, void obuf, size_t olen)
	50	{
	51	struct ceph_x_encrypt_header head = {
	52	.struct_v = 1,
	53	.magic = cpu_to_le64(CEPHX_ENC_MAGIC)
	54	};
	55	size_t len = olen - sizeof(u32);
	56	int ret;
	57
	58	ret = ceph_encrypt2(secret, obuf + sizeof(u32), &len,
	59	&head, sizeof(head), ibuf, ilen);
	60	if (ret)
	61	return ret;
	62	ceph_encode_32(&obuf, len);
	63	return len + sizeof(u32);
	64	}
	65
	66	static int ceph_x_decrypt(struct ceph_crypto_key *secret,
	67	void *p, void end, void *obuf, size_t olen)
	68	{
	69	struct ceph_x_encrypt_header head;
	70	size_t head_len = sizeof(head);
	71	int len, ret;
	72
	73	len = ceph_decode_32(p);
	74	if (*p + len > end)
	75	return -EINVAL;
	76
	77	dout("ceph_x_decrypt len %d\n", len);
	78	ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen,
	79	*p, len);
	80	if (ret)
	81	return ret;
	82	if (head.struct_v != 1 \|\| le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC)
	83	return -EPERM;
	84	*p += len;
	85	return olen;
	86	}
	87
	88	/*
	89	* get existing (or insert new) ticket handler
	90	*/
cd84db6e YS	91	static struct ceph_x_ticket_handler *
cd84db6e YS	92	get_ticket_handler(struct ceph_auth_client *ac, int service)
ec0994e4 SW	93	{
	94	struct ceph_x_ticket_handler *th;
	95	struct ceph_x_info *xi = ac->private;
	96	struct rb_node parent = NULL, *p = &xi->ticket_handlers.rb_node;
	97
	98	while (*p) {
	99	parent = *p;
	100	th = rb_entry(parent, struct ceph_x_ticket_handler, node);
	101	if (service < th->service)
	102	p = &(*p)->rb_left;
	103	else if (service > th->service)
	104	p = &(*p)->rb_right;
	105	else
	106	return th;
	107	}
	108
	109	/* add it */
	110	th = kzalloc(sizeof(*th), GFP_NOFS);
	111	if (!th)
	112	return ERR_PTR(-ENOMEM);
	113	th->service = service;
	114	rb_link_node(&th->node, parent, p);
	115	rb_insert_color(&th->node, &xi->ticket_handlers);
	116	return th;
	117	}
	118
	119	static void remove_ticket_handler(struct ceph_auth_client *ac,
	120	struct ceph_x_ticket_handler *th)
	121	{
	122	struct ceph_x_info *xi = ac->private;
	123
	124	dout("remove_ticket_handler %p %d\n", th, th->service);
	125	rb_erase(&th->node, &xi->ticket_handlers);
	126	ceph_crypto_key_destroy(&th->session_key);
	127	if (th->ticket_blob)
	128	ceph_buffer_put(th->ticket_blob);
	129	kfree(th);
	130	}
	131
2e1dbf27 ID	132	static int process_one_ticket(struct ceph_auth_client *ac,
	133	struct ceph_crypto_key *secret,
	134	void *p, void end,
	135	void dbuf, void ticket_buf)
	136	{
	137	struct ceph_x_info *xi = ac->private;
	138	int type;
	139	u8 tkt_struct_v, blob_struct_v;
	140	struct ceph_x_ticket_handler *th;
	141	void dp, dend;
	142	int dlen;
	143	char is_enc;
	144	struct timespec validity;
	145	struct ceph_crypto_key old_key;
	146	void tp, tpend;
	147	struct ceph_timespec new_validity;
	148	struct ceph_crypto_key new_session_key;
	149	struct ceph_buffer *new_ticket_blob;
	150	unsigned long new_expires, new_renew_after;
	151	u64 new_secret_id;
	152	int ret;
	153
	154	ceph_decode_need(p, end, sizeof(u32) + 1, bad);
	155
	156	type = ceph_decode_32(p);
	157	dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
	158
	159	tkt_struct_v = ceph_decode_8(p);
	160	if (tkt_struct_v != 1)
	161	goto bad;
	162
	163	th = get_ticket_handler(ac, type);
	164	if (IS_ERR(th)) {
	165	ret = PTR_ERR(th);
	166	goto out;
	167	}
	168
	169	/* blob for me */
	170	dlen = ceph_x_decrypt(secret, p, end, dbuf,
	171	TEMP_TICKET_BUF_LEN);
	172	if (dlen <= 0) {
	173	ret = dlen;
	174	goto out;
	175	}
	176	dout(" decrypted %d bytes\n", dlen);
	177	dp = dbuf;
	178	dend = dp + dlen;
	179
	180	tkt_struct_v = ceph_decode_8(&dp);
	181	if (tkt_struct_v != 1)
	182	goto bad;
	183
	184	memcpy(&old_key, &th->session_key, sizeof(old_key));
	185	ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
	186	if (ret)
	187	goto out;
	188
	189	ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
	190	ceph_decode_timespec(&validity, &new_validity);
	191	new_expires = get_seconds() + validity.tv_sec;
	192	new_renew_after = new_expires - (validity.tv_sec / 4);
	193	dout(" expires=%lu renew_after=%lu\n", new_expires,
	194	new_renew_after);
	195
196	/* ticket blob for service */
197	ceph_decode_8_safe(p, end, is_enc, bad);
198	tp = ticket_buf;
199	if (is_enc) {
200	/* encrypted */
201	dout(" encrypted ticket\n");
202	dlen = ceph_x_decrypt(&old_key, p, end, ticket_buf,
203	TEMP_TICKET_BUF_LEN);
204	if (dlen < 0) {
205	ret = dlen;
206	goto out;
207	}
208	dlen = ceph_decode_32(&tp);
209	} else {
210	/* unencrypted */
211	ceph_decode_32_safe(p, end, dlen, bad);
212	ceph_decode_need(p, end, dlen, bad);
213	ceph_decode_copy(p, ticket_buf, dlen);
214	}
215	tpend = tp + dlen;
216	dout(" ticket blob is %d bytes\n", dlen);
217	ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
218	blob_struct_v = ceph_decode_8(&tp);
219	new_secret_id = ceph_decode_64(&tp);
220	ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
221	if (ret)
222	goto out;
223
224	/* all is well, update our ticket */
225	ceph_crypto_key_destroy(&th->session_key);
226	if (th->ticket_blob)
227	ceph_buffer_put(th->ticket_blob);
228	th->session_key = new_session_key;
229	th->ticket_blob = new_ticket_blob;
230	th->validity = new_validity;
231	th->secret_id = new_secret_id;
232	th->expires = new_expires;
233	th->renew_after = new_renew_after;
234	dout(" got ticket service %d (%s) secret_id %lld len %d\n",
235	type, ceph_entity_type_name(type), th->secret_id,
236	(int)th->ticket_blob->vec.iov_len);
237	xi->have_keys \|= th->service;
238
239	out:
240	return ret;
241
242	bad:
243	ret = -EINVAL;
244	goto out;
245	}
246
ec0994e4 SW	247	static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
	248	struct ceph_crypto_key *secret,
	249	void buf, void end)
	250	{
ec0994e4	251	void *p = buf;
ec0994e4 SW	252	char *dbuf;
ec0994e4 SW	253	char *ticket_buf;
b736b3d9	254	u8 reply_struct_v;
2e1dbf27 ID	255	u32 num;
2e1dbf27 ID	256	int ret;
ec0994e4	257
b0930f8d	258	dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
ec0994e4 SW	259	if (!dbuf)
	260	return -ENOMEM;
	261
	262	ret = -ENOMEM;
b0930f8d	263	ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
ec0994e4 SW	264	if (!ticket_buf)
	265	goto out_dbuf;
	266
2e1dbf27	267	ceph_decode_8_safe(&p, end, reply_struct_v, bad);
b736b3d9	268	if (reply_struct_v != 1)
2e1dbf27	269	return -EINVAL;
ec0994e4	270
2e1dbf27 ID	271	ceph_decode_32_safe(&p, end, num, bad);
2e1dbf27 ID	272	dout("%d tickets\n", num);
ec0994e4	273
2e1dbf27 ID	274	while (num--) {
	275	ret = process_one_ticket(ac, secret, &p, end,
	276	dbuf, ticket_buf);
ec0994e4 SW	277	if (ret)
ec0994e4 SW	278	goto out;
ec0994e4 SW	279	}
	280
	281	ret = 0;
	282	out:
b0930f8d	283	kfree(ticket_buf);
ec0994e4	284	out_dbuf:
b0930f8d	285	kfree(dbuf);
ec0994e4 SW	286	return ret;
	287
	288	bad:
	289	ret = -EINVAL;
	290	goto out;
	291	}
	292
	293	static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
	294	struct ceph_x_ticket_handler *th,
	295	struct ceph_x_authorizer *au)
	296	{
807c86e2	297	int maxlen;
ec0994e4 SW	298	struct ceph_x_authorize_a *msg_a;
	299	struct ceph_x_authorize_b msg_b;
	300	void p, end;
	301	int ret;
	302	int ticket_blob_len =
	303	(th->ticket_blob ? th->ticket_blob->vec.iov_len : 0);
	304
	305	dout("build_authorizer for %s %p\n",
	306	ceph_entity_type_name(th->service), au);
	307
807c86e2 SW	308	maxlen = sizeof(*msg_a) + sizeof(msg_b) +
	309	ceph_x_encrypt_buflen(ticket_blob_len);
	310	dout(" need len %d\n", maxlen);
	311	if (au->buf && au->buf->alloc_len < maxlen) {
ec0994e4 SW	312	ceph_buffer_put(au->buf);
	313	au->buf = NULL;
	314	}
	315	if (!au->buf) {
807c86e2	316	au->buf = ceph_buffer_new(maxlen, GFP_NOFS);
ec0994e4 SW	317	if (!au->buf)
	318	return -ENOMEM;
	319	}
	320	au->service = th->service;
0bed9b5c	321	au->secret_id = th->secret_id;
ec0994e4 SW	322
	323	msg_a = au->buf->vec.iov_base;
	324	msg_a->struct_v = 1;
	325	msg_a->global_id = cpu_to_le64(ac->global_id);
	326	msg_a->service_id = cpu_to_le32(th->service);
	327	msg_a->ticket_blob.struct_v = 1;
	328	msg_a->ticket_blob.secret_id = cpu_to_le64(th->secret_id);
	329	msg_a->ticket_blob.blob_len = cpu_to_le32(ticket_blob_len);
	330	if (ticket_blob_len) {
	331	memcpy(msg_a->ticket_blob.blob, th->ticket_blob->vec.iov_base,
	332	th->ticket_blob->vec.iov_len);
	333	}
	334	dout(" th %p secret_id %lld %lld\n", th, th->secret_id,
	335	le64_to_cpu(msg_a->ticket_blob.secret_id));
	336
	337	p = msg_a + 1;
	338	p += ticket_blob_len;
	339	end = au->buf->vec.iov_base + au->buf->vec.iov_len;
	340
	341	get_random_bytes(&au->nonce, sizeof(au->nonce));
	342	msg_b.struct_v = 1;
	343	msg_b.nonce = cpu_to_le64(au->nonce);
	344	ret = ceph_x_encrypt(&th->session_key, &msg_b, sizeof(msg_b),
	345	p, end - p);
	346	if (ret < 0)
	347	goto out_buf;
	348	p += ret;
	349	au->buf->vec.iov_len = p - au->buf->vec.iov_base;
	350	dout(" built authorizer nonce %llx len %d\n", au->nonce,
	351	(int)au->buf->vec.iov_len);
807c86e2	352	BUG_ON(au->buf->vec.iov_len > maxlen);
ec0994e4 SW	353	return 0;
	354
	355	out_buf:
	356	ceph_buffer_put(au->buf);
	357	au->buf = NULL;
	358	return ret;
	359	}
	360
	361	static int ceph_x_encode_ticket(struct ceph_x_ticket_handler *th,
	362	void *p, void end)
	363	{
	364	ceph_decode_need(p, end, 1 + sizeof(u64), bad);
	365	ceph_encode_8(p, 1);
	366	ceph_encode_64(p, th->secret_id);
	367	if (th->ticket_blob) {
	368	const char *buf = th->ticket_blob->vec.iov_base;
	369	u32 len = th->ticket_blob->vec.iov_len;
	370
	371	ceph_encode_32_safe(p, end, len, bad);
	372	ceph_encode_copy_safe(p, end, buf, len, bad);
	373	} else {
	374	ceph_encode_32_safe(p, end, 0, bad);
	375	}
	376
	377	return 0;
	378	bad:
	379	return -ERANGE;
	380	}
	381
	382	static void ceph_x_validate_tickets(struct ceph_auth_client ac, int pneed)
	383	{
	384	int want = ac->want_keys;
	385	struct ceph_x_info *xi = ac->private;
	386	int service;
	387
	388	*pneed = ac->want_keys & ~(xi->have_keys);
	389
	390	for (service = 1; service <= want; service <<= 1) {
	391	struct ceph_x_ticket_handler *th;
	392
	393	if (!(ac->want_keys & service))
	394	continue;
	395
	396	if (*pneed & service)
	397	continue;
	398
	399	th = get_ticket_handler(ac, service);
	400
b545787d	401	if (IS_ERR(th)) {
ec0994e4 SW	402	*pneed \|= service;
	403	continue;
	404	}
	405
	406	if (get_seconds() >= th->renew_after)
	407	*pneed \|= service;
	408	if (get_seconds() >= th->expires)
	409	xi->have_keys &= ~service;
	410	}
	411	}
	412
	413
	414	static int ceph_x_build_request(struct ceph_auth_client *ac,
	415	void buf, void end)
	416	{
	417	struct ceph_x_info *xi = ac->private;
	418	int need;
	419	struct ceph_x_request_header *head = buf;
	420	int ret;
	421	struct ceph_x_ticket_handler *th =
	422	get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
	423
b545787d DC	424	if (IS_ERR(th))
	425	return PTR_ERR(th);
	426
ec0994e4 SW	427	ceph_x_validate_tickets(ac, &need);
	428
	429	dout("build_request want %x have %x need %x\n",
	430	ac->want_keys, xi->have_keys, need);
	431
	432	if (need & CEPH_ENTITY_TYPE_AUTH) {
	433	struct ceph_x_authenticate auth = (void )(head + 1);
	434	void *p = auth + 1;
	435	struct ceph_x_challenge_blob tmp;
	436	char tmp_enc[40];
	437	u64 *u;
	438
	439	if (p > end)
	440	return -ERANGE;
	441
	442	dout(" get_auth_session_key\n");
	443	head->op = cpu_to_le16(CEPHX_GET_AUTH_SESSION_KEY);
	444
	445	/* encrypt and hash */
	446	get_random_bytes(&auth->client_challenge, sizeof(u64));
	447	tmp.client_challenge = auth->client_challenge;
	448	tmp.server_challenge = cpu_to_le64(xi->server_challenge);
	449	ret = ceph_x_encrypt(&xi->secret, &tmp, sizeof(tmp),
	450	tmp_enc, sizeof(tmp_enc));
	451	if (ret < 0)
	452	return ret;
	453
	454	auth->struct_v = 1;
	455	auth->key = 0;
	456	for (u = (u64 )tmp_enc; u + 1 <= (u64 )(tmp_enc + ret); u++)
cd84db6e	457	auth->key ^= (__le64 )u;
ec0994e4 SW	458	dout(" server_challenge %llx client_challenge %llx key %llx\n",
	459	xi->server_challenge, le64_to_cpu(auth->client_challenge),
	460	le64_to_cpu(auth->key));
	461
	462	/* now encode the old ticket if exists */
	463	ret = ceph_x_encode_ticket(th, &p, end);
	464	if (ret < 0)
	465	return ret;
	466
	467	return p - buf;
	468	}
	469
	470	if (need) {
	471	void *p = head + 1;
	472	struct ceph_x_service_ticket_request *req;
	473
	474	if (p > end)
	475	return -ERANGE;
	476	head->op = cpu_to_le16(CEPHX_GET_PRINCIPAL_SESSION_KEY);
	477
ec0994e4 SW	478	ret = ceph_x_build_authorizer(ac, th, &xi->auth_authorizer);
	479	if (ret)
	480	return ret;
	481	ceph_encode_copy(&p, xi->auth_authorizer.buf->vec.iov_base,
	482	xi->auth_authorizer.buf->vec.iov_len);
	483
	484	req = p;
	485	req->keys = cpu_to_le32(need);
	486	p += sizeof(*req);
	487	return p - buf;
	488	}
	489
	490	return 0;
	491	}
	492
	493	static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
	494	void buf, void end)
	495	{
	496	struct ceph_x_info *xi = ac->private;
	497	struct ceph_x_reply_header *head = buf;
	498	struct ceph_x_ticket_handler *th;
	499	int len = end - buf;
	500	int op;
	501	int ret;
	502
	503	if (result)
	504	return result; /* XXX hmm? */
	505
	506	if (xi->starting) {
	507	/* it's a hello */
	508	struct ceph_x_server_challenge *sc = buf;
	509
	510	if (len != sizeof(*sc))
	511	return -EINVAL;
	512	xi->server_challenge = le64_to_cpu(sc->server_challenge);
	513	dout("handle_reply got server challenge %llx\n",
	514	xi->server_challenge);
	515	xi->starting = false;
	516	xi->have_keys &= ~CEPH_ENTITY_TYPE_AUTH;
	517	return -EAGAIN;
	518	}
	519
0cf5537b	520	op = le16_to_cpu(head->op);
ec0994e4 SW	521	result = le32_to_cpu(head->result);
	522	dout("handle_reply op %d result %d\n", op, result);
	523	switch (op) {
	524	case CEPHX_GET_AUTH_SESSION_KEY:
	525	/* verify auth key */
	526	ret = ceph_x_proc_ticket_reply(ac, &xi->secret,
	527	buf + sizeof(*head), end);
	528	break;
	529
	530	case CEPHX_GET_PRINCIPAL_SESSION_KEY:
	531	th = get_ticket_handler(ac, CEPH_ENTITY_TYPE_AUTH);
b545787d DC	532	if (IS_ERR(th))
b545787d DC	533	return PTR_ERR(th);
ec0994e4 SW	534	ret = ceph_x_proc_ticket_reply(ac, &th->session_key,
	535	buf + sizeof(*head), end);
	536	break;
	537
	538	default:
	539	return -EINVAL;
	540	}
	541	if (ret)
	542	return ret;
	543	if (ac->want_keys == xi->have_keys)
	544	return 0;
	545	return -EAGAIN;
	546	}
	547
	548	static int ceph_x_create_authorizer(
	549	struct ceph_auth_client *ac, int peer_type,
74f1869f	550	struct ceph_auth_handshake *auth)
ec0994e4 SW	551	{
	552	struct ceph_x_authorizer *au;
	553	struct ceph_x_ticket_handler *th;
	554	int ret;
	555
	556	th = get_ticket_handler(ac, peer_type);
	557	if (IS_ERR(th))
	558	return PTR_ERR(th);
	559
	560	au = kzalloc(sizeof(*au), GFP_NOFS);
	561	if (!au)
	562	return -ENOMEM;
	563
	564	ret = ceph_x_build_authorizer(ac, th, au);
	565	if (ret) {
	566	kfree(au);
	567	return ret;
	568	}
	569
74f1869f AE	570	auth->authorizer = (struct ceph_authorizer *) au;
	571	auth->authorizer_buf = au->buf->vec.iov_base;
	572	auth->authorizer_buf_len = au->buf->vec.iov_len;
	573	auth->authorizer_reply_buf = au->reply_buf;
	574	auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
	575
ec0994e4 SW	576	return 0;
	577	}
	578
0bed9b5c SW	579	static int ceph_x_update_authorizer(
	580	struct ceph_auth_client *ac, int peer_type,
	581	struct ceph_auth_handshake *auth)
	582	{
	583	struct ceph_x_authorizer *au;
	584	struct ceph_x_ticket_handler *th;
0bed9b5c SW	585
	586	th = get_ticket_handler(ac, peer_type);
	587	if (IS_ERR(th))
	588	return PTR_ERR(th);
	589
	590	au = (struct ceph_x_authorizer *)auth->authorizer;
	591	if (au->secret_id < th->secret_id) {
	592	dout("ceph_x_update_authorizer service %u secret %llu < %llu\n",
	593	au->service, au->secret_id, th->secret_id);
	594	return ceph_x_build_authorizer(ac, th, au);
	595	}
	596	return 0;
	597	}
	598
ec0994e4 SW	599	static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
	600	struct ceph_authorizer *a, size_t len)
	601	{
	602	struct ceph_x_authorizer au = (void )a;
	603	struct ceph_x_ticket_handler *th;
	604	int ret = 0;
	605	struct ceph_x_authorize_reply reply;
	606	void *p = au->reply_buf;
	607	void *end = p + sizeof(au->reply_buf);
	608
	609	th = get_ticket_handler(ac, au->service);
b545787d DC	610	if (IS_ERR(th))
b545787d DC	611	return PTR_ERR(th);
ec0994e4 SW	612	ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply));
	613	if (ret < 0)
	614	return ret;
	615	if (ret != sizeof(reply))
	616	return -EPERM;
	617
	618	if (au->nonce + 1 != le64_to_cpu(reply.nonce_plus_one))
	619	ret = -EPERM;
	620	else
	621	ret = 0;
	622	dout("verify_authorizer_reply nonce %llx got %llx ret %d\n",
	623	au->nonce, le64_to_cpu(reply.nonce_plus_one), ret);
	624	return ret;
	625	}
	626
	627	static void ceph_x_destroy_authorizer(struct ceph_auth_client *ac,
	628	struct ceph_authorizer *a)
	629	{
	630	struct ceph_x_authorizer au = (void )a;
	631
	632	ceph_buffer_put(au->buf);
	633	kfree(au);
	634	}
	635
	636
	637	static void ceph_x_reset(struct ceph_auth_client *ac)
	638	{
	639	struct ceph_x_info *xi = ac->private;
	640
	641	dout("reset\n");
	642	xi->starting = true;
	643	xi->server_challenge = 0;
	644	}
	645
	646	static void ceph_x_destroy(struct ceph_auth_client *ac)
	647	{
	648	struct ceph_x_info *xi = ac->private;
	649	struct rb_node *p;
	650
	651	dout("ceph_x_destroy %p\n", ac);
	652	ceph_crypto_key_destroy(&xi->secret);
	653
	654	while ((p = rb_first(&xi->ticket_handlers)) != NULL) {
	655	struct ceph_x_ticket_handler *th =
	656	rb_entry(p, struct ceph_x_ticket_handler, node);
	657	remove_ticket_handler(ac, th);
	658	}
	659
22b1de06 SW	660	if (xi->auth_authorizer.buf)
	661	ceph_buffer_put(xi->auth_authorizer.buf);
	662
ec0994e4 SW	663	kfree(ac->private);
	664	ac->private = NULL;
	665	}
	666
	667	static void ceph_x_invalidate_authorizer(struct ceph_auth_client *ac,
	668	int peer_type)
	669	{
	670	struct ceph_x_ticket_handler *th;
	671
	672	th = get_ticket_handler(ac, peer_type);
b545787d	673	if (!IS_ERR(th))
4b8e8b5d	674	memset(&th->validity, 0, sizeof(th->validity));
ec0994e4 SW	675	}
	676
	677
	678	static const struct ceph_auth_client_ops ceph_x_ops = {
559c1e00	679	.name = "x",
ec0994e4	680	.is_authenticated = ceph_x_is_authenticated,
a41359fa	681	.should_authenticate = ceph_x_should_authenticate,
ec0994e4 SW	682	.build_request = ceph_x_build_request,
	683	.handle_reply = ceph_x_handle_reply,
	684	.create_authorizer = ceph_x_create_authorizer,
0bed9b5c	685	.update_authorizer = ceph_x_update_authorizer,
ec0994e4 SW	686	.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
	687	.destroy_authorizer = ceph_x_destroy_authorizer,
	688	.invalidate_authorizer = ceph_x_invalidate_authorizer,
	689	.reset = ceph_x_reset,
	690	.destroy = ceph_x_destroy,
	691	};
	692
	693
	694	int ceph_x_init(struct ceph_auth_client *ac)
	695	{
	696	struct ceph_x_info *xi;
	697	int ret;
	698
	699	dout("ceph_x_init %p\n", ac);
b0930f8d	700	ret = -ENOMEM;
ec0994e4 SW	701	xi = kzalloc(sizeof(*xi), GFP_NOFS);
ec0994e4 SW	702	if (!xi)
b0930f8d	703	goto out;
ec0994e4	704
ec0994e4	705	ret = -EINVAL;
8323c3aa	706	if (!ac->key) {
ec0994e4	707	pr_err("no secret set (for auth_x protocol)\n");
b0930f8d	708	goto out_nomem;
ec0994e4 SW	709	}
ec0994e4 SW	710
8323c3aa TV	711	ret = ceph_crypto_key_clone(&xi->secret, ac->key);
	712	if (ret < 0) {
	713	pr_err("cannot clone key: %d\n", ret);
b0930f8d	714	goto out_nomem;
8323c3aa	715	}
ec0994e4 SW	716
	717	xi->starting = true;
	718	xi->ticket_handlers = RB_ROOT;
	719
	720	ac->protocol = CEPH_AUTH_CEPHX;
	721	ac->private = xi;
	722	ac->ops = &ceph_x_ops;
	723	return 0;
	724
b0930f8d	725	out_nomem:
ec0994e4	726	kfree(xi);
b0930f8d	727	out:
ec0994e4 SW	728	return ret;
	729	}
	730
	731