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sctp: Use shash

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This patch replaces uses of the long obsolete hash interface with
shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2016-01-24 21:20:12 +08:00
parent 1edb82d202
commit 5821c76970
6 changed files with 55 additions and 47 deletions
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4
include/net/sctp/auth.h
View File

@ -31,12 +31,12 @@
#define __sctp_auth_h__
#include <linux/list.h>
#include <linux/crypto.h>
struct sctp_endpoint;
struct sctp_association;
struct sctp_authkey;
struct sctp_hmacalgo;
struct crypto_shash;
/*
* Define a generic struct that will hold all the info
@ -90,7 +90,7 @@ int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep,
struct sctp_association *asoc,
gfp_t gfp);
int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp);
void sctp_auth_destroy_hmacs(struct crypto_hash *auth_hmacs[]);
void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[]);
struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id);
struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc);
void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc,

6
include/net/sctp/structs.h
View File

@ -82,7 +82,7 @@ struct sctp_bind_addr;
struct sctp_ulpq;
struct sctp_ep_common;
struct sctp_ssnmap;
struct crypto_hash;
struct crypto_shash;
#include <net/sctp/tsnmap.h>
@ -166,7 +166,7 @@ struct sctp_sock {
struct sctp_pf *pf;
/* Access to HMAC transform. */
struct crypto_hash *hmac;
struct crypto_shash *hmac;
char *sctp_hmac_alg;
/* What is our base endpointer? */
@ -1235,7 +1235,7 @@ struct sctp_endpoint {
/* SCTP AUTH: array of the HMACs that will be allocated
* we need this per association so that we don't serialize
*/
struct crypto_hash **auth_hmacs;
struct crypto_shash **auth_hmacs;
/* SCTP-AUTH: hmacs for the endpoint encoded into parameter */
struct sctp_hmac_algo_param *auth_hmacs_list;

36
net/sctp/auth.c
View File

@ -27,9 +27,9 @@
* Vlad Yasevich <vladislav.yasevich@hp.com>
*/
#include <crypto/hash.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/scatterlist.h>
#include <net/sctp/sctp.h>
#include <net/sctp/auth.h>
@ -448,7 +448,7 @@ struct sctp_shared_key *sctp_auth_get_shkey(
*/
int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp)
{
struct crypto_hash *tfm = NULL;
struct crypto_shash *tfm = NULL;
__u16 id;
/* If AUTH extension is disabled, we are done */
@ -462,9 +462,8 @@ int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp)
return 0;
/* Allocated the array of pointers to transorms */
ep->auth_hmacs = kzalloc(
sizeof(struct crypto_hash *) * SCTP_AUTH_NUM_HMACS,
gfp);
ep->auth_hmacs = kzalloc(sizeof(struct crypto_shash *) *
SCTP_AUTH_NUM_HMACS, gfp);
if (!ep->auth_hmacs)
return -ENOMEM;
@ -483,8 +482,7 @@ int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp)
continue;
/* Allocate the ID */
tfm = crypto_alloc_hash(sctp_hmac_list[id].hmac_name, 0,
CRYPTO_ALG_ASYNC);
tfm = crypto_alloc_shash(sctp_hmac_list[id].hmac_name, 0, 0);
if (IS_ERR(tfm))
goto out_err;
@ -500,7 +498,7 @@ out_err:
}
/* Destroy the hmac tfm array */
void sctp_auth_destroy_hmacs(struct crypto_hash *auth_hmacs[])
void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[])
{
int i;
@ -508,8 +506,7 @@ void sctp_auth_destroy_hmacs(struct crypto_hash *auth_hmacs[])
return;
for (i = 0; i < SCTP_AUTH_NUM_HMACS; i++) {
if (auth_hmacs[i])
crypto_free_hash(auth_hmacs[i]);
crypto_free_shash(auth_hmacs[i]);
}
kfree(auth_hmacs);
}
@ -709,8 +706,7 @@ void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
struct sctp_auth_chunk *auth,
gfp_t gfp)
{
struct scatterlist sg;
struct hash_desc desc;
struct crypto_shash *tfm;
struct sctp_auth_bytes *asoc_key;
__u16 key_id, hmac_id;
__u8 *digest;
@ -742,16 +738,22 @@ void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
/* set up scatter list */
end = skb_tail_pointer(skb);
sg_init_one(&sg, auth, end - (unsigned char *)auth);
desc.tfm = asoc->ep->auth_hmacs[hmac_id];
desc.flags = 0;
tfm = asoc->ep->auth_hmacs[hmac_id];
digest = auth->auth_hdr.hmac;
if (crypto_hash_setkey(desc.tfm, &asoc_key->data[0], asoc_key->len))
if (crypto_shash_setkey(tfm, &asoc_key->data[0], asoc_key->len))
goto free;
crypto_hash_digest(&desc, &sg, sg.length, digest);
{
SHASH_DESC_ON_STACK(desc, tfm);
desc->tfm = tfm;
desc->flags = 0;
crypto_shash_digest(desc, (u8 *)auth,
end - (unsigned char *)auth, digest);
shash_desc_zero(desc);
}
free:
if (free_key)

1
net/sctp/endpointola.c
View File

@ -42,7 +42,6 @@
#include <linux/slab.h>
#include <linux/in.h>
#include <linux/random.h> /* get_random_bytes() */
#include <linux/crypto.h>
#include <net/sock.h>
#include <net/ipv6.h>
#include <net/sctp/sctp.h>

47
net/sctp/sm_make_chunk.c
View File

@ -45,6 +45,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <crypto/hash.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/ip.h>
@ -52,7 +53,6 @@
#include <linux/net.h>
#include <linux/inet.h>
#include <linux/scatterlist.h>
#include <linux/crypto.h>
#include <linux/slab.h>
#include <net/sock.h>
@ -1606,7 +1606,6 @@ static sctp_cookie_param_t *sctp_pack_cookie(const struct sctp_endpoint *ep,
{
sctp_cookie_param_t *retval;
struct sctp_signed_cookie *cookie;
struct scatterlist sg;
int headersize, bodysize;
/* Header size is static data prior to the actual cookie, including
@ -1663,16 +1662,19 @@ static sctp_cookie_param_t *sctp_pack_cookie(const struct sctp_endpoint *ep,
ntohs(init_chunk->chunk_hdr->length), raw_addrs, addrs_len);
if (sctp_sk(ep->base.sk)->hmac) {
struct hash_desc desc;
SHASH_DESC_ON_STACK(desc, sctp_sk(ep->base.sk)->hmac);
int err;
/* Sign the message. */
sg_init_one(&sg, &cookie->c, bodysize);
desc.tfm = sctp_sk(ep->base.sk)->hmac;
desc.flags = 0;
desc->tfm = sctp_sk(ep->base.sk)->hmac;
desc->flags = 0;
if (crypto_hash_setkey(desc.tfm, ep->secret_key,
sizeof(ep->secret_key)) ||
crypto_hash_digest(&desc, &sg, bodysize, cookie->signature))
err = crypto_shash_setkey(desc->tfm, ep->secret_key,
sizeof(ep->secret_key)) ?:
crypto_shash_digest(desc, (u8 *)&cookie->c, bodysize,
cookie->signature);
shash_desc_zero(desc);
if (err)
goto free_cookie;
}
@ -1697,12 +1699,10 @@ struct sctp_association *sctp_unpack_cookie(
struct sctp_cookie *bear_cookie;
int headersize, bodysize, fixed_size;
__u8 *digest = ep->digest;
struct scatterlist sg;
unsigned int len;
sctp_scope_t scope;
struct sk_buff *skb = chunk->skb;
ktime_t kt;
struct hash_desc desc;
/* Header size is static data prior to the actual cookie, including
* any padding.
@ -1733,16 +1733,23 @@ struct sctp_association *sctp_unpack_cookie(
goto no_hmac;
/* Check the signature. */
sg_init_one(&sg, bear_cookie, bodysize);
desc.tfm = sctp_sk(ep->base.sk)->hmac;
desc.flags = 0;
{
SHASH_DESC_ON_STACK(desc, sctp_sk(ep->base.sk)->hmac);
int err;
memset(digest, 0x00, SCTP_SIGNATURE_SIZE);
if (crypto_hash_setkey(desc.tfm, ep->secret_key,
sizeof(ep->secret_key)) ||
crypto_hash_digest(&desc, &sg, bodysize, digest)) {
*error = -SCTP_IERROR_NOMEM;
goto fail;
desc->tfm = sctp_sk(ep->base.sk)->hmac;
desc->flags = 0;
err = crypto_shash_setkey(desc->tfm, ep->secret_key,
sizeof(ep->secret_key)) ?:
crypto_shash_digest(desc, (u8 *)bear_cookie, bodysize,
digest);
shash_desc_zero(desc);
if (err) {
*error = -SCTP_IERROR_NOMEM;
goto fail;
}
}
if (memcmp(digest, cookie->signature, SCTP_SIGNATURE_SIZE)) {

8
net/sctp/socket.c
View File

@ -52,6 +52,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <crypto/hash.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/wait.h>
@ -61,7 +62,6 @@
#include <linux/fcntl.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/compat.h>
@ -4160,7 +4160,7 @@ static void sctp_destruct_sock(struct sock *sk)
struct sctp_sock *sp = sctp_sk(sk);
/* Free up the HMAC transform. */
crypto_free_hash(sp->hmac);
crypto_free_shash(sp->hmac);
inet_sock_destruct(sk);
}
@ -6299,13 +6299,13 @@ static int sctp_listen_start(struct sock *sk, int backlog)
{
struct sctp_sock *sp = sctp_sk(sk);
struct sctp_endpoint *ep = sp->ep;
struct crypto_hash *tfm = NULL;
struct crypto_shash *tfm = NULL;
char alg[32];
/* Allocate HMAC for generating cookie. */
if (!sp->hmac && sp->sctp_hmac_alg) {
sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
tfm = crypto_alloc_hash(alg, 0, CRYPTO_ALG_ASYNC);
tfm = crypto_alloc_shash(alg, 0, 0);
if (IS_ERR(tfm)) {
net_info_ratelimited("failed to load transform for %s: %ld\n",
sp->sctp_hmac_alg, PTR_ERR(tfm));