struct ahash_request req;
};
-static int hash_sendmsg(struct kiocb *unused, struct socket *sock,
- struct msghdr *msg, size_t ignored)
+struct algif_hash_tfm {
+ struct crypto_ahash *hash;
+ bool has_key;
+};
+
+static int hash_sendmsg(struct socket *sock, struct msghdr *msg,
+ size_t ignored)
{
int limit = ALG_MAX_PAGES * PAGE_SIZE;
struct sock *sk = sock->sk;
struct alg_sock *ask = alg_sk(sk);
struct hash_ctx *ctx = ask->private;
- unsigned long iovlen;
- struct iovec *iov;
long copied = 0;
int err;
lock_sock(sk);
if (!ctx->more) {
- err = crypto_ahash_init(&ctx->req);
+ err = af_alg_wait_for_completion(crypto_ahash_init(&ctx->req),
+ &ctx->completion);
if (err)
goto unlock;
}
ctx->more = 0;
- for (iov = msg->msg_iov, iovlen = msg->msg_iovlen; iovlen > 0;
- iovlen--, iov++) {
- unsigned long seglen = iov->iov_len;
- char __user *from = iov->iov_base;
+ while (msg_data_left(msg)) {
+ int len = msg_data_left(msg);
- while (seglen) {
- int len = min_t(unsigned long, seglen, limit);
- int newlen;
-
- newlen = af_alg_make_sg(&ctx->sgl, from, len, 0);
- if (newlen < 0) {
- err = copied ? 0 : newlen;
- goto unlock;
- }
+ if (len > limit)
+ len = limit;
- ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL,
- newlen);
-
- err = af_alg_wait_for_completion(
- crypto_ahash_update(&ctx->req),
- &ctx->completion);
+ len = af_alg_make_sg(&ctx->sgl, &msg->msg_iter, len);
+ if (len < 0) {
+ err = copied ? 0 : len;
+ goto unlock;
+ }
- af_alg_free_sg(&ctx->sgl);
+ ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL, len);
- if (err)
- goto unlock;
+ err = af_alg_wait_for_completion(crypto_ahash_update(&ctx->req),
+ &ctx->completion);
+ af_alg_free_sg(&ctx->sgl);
+ if (err)
+ goto unlock;
- seglen -= newlen;
- from += newlen;
- copied += newlen;
- }
+ copied += len;
+ iov_iter_advance(&msg->msg_iter, len);
}
err = 0;
struct hash_ctx *ctx = ask->private;
int err;
+ if (flags & MSG_SENDPAGE_NOTLAST)
+ flags |= MSG_MORE;
+
lock_sock(sk);
sg_init_table(ctx->sgl.sg, 1);
sg_set_page(ctx->sgl.sg, page, size, offset);
} else {
if (!ctx->more) {
err = crypto_ahash_init(&ctx->req);
+ err = af_alg_wait_for_completion(err, &ctx->completion);
if (err)
goto unlock;
}
return err ?: size;
}
-static int hash_recvmsg(struct kiocb *unused, struct socket *sock,
- struct msghdr *msg, size_t len, int flags)
+static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
+ int flags)
{
struct sock *sk = sock->sk;
struct alg_sock *ask = alg_sk(sk);
else if (len < ds)
msg->msg_flags |= MSG_TRUNC;
- msg->msg_namelen = 0;
-
lock_sock(sk);
if (ctx->more) {
ctx->more = 0;
goto unlock;
}
- err = memcpy_toiovec(msg->msg_iov, ctx->result, len);
+ err = memcpy_to_msg(msg, ctx->result, len);
unlock:
release_sock(sk);
struct sock *sk2;
struct alg_sock *ask2;
struct hash_ctx *ctx2;
+ bool more;
int err;
- err = crypto_ahash_export(req, state);
+ lock_sock(sk);
+ more = ctx->more;
+ err = more ? crypto_ahash_export(req, state) : 0;
+ release_sock(sk);
+
if (err)
return err;
sk2 = newsock->sk;
ask2 = alg_sk(sk2);
ctx2 = ask2->private;
- ctx2->more = 1;
+ ctx2->more = more;
+
+ if (!more)
+ return err;
err = crypto_ahash_import(&ctx2->req, state);
if (err) {
.accept = hash_accept,
};
+static int hash_check_key(struct socket *sock)
+{
+ int err = 0;
+ struct sock *psk;
+ struct alg_sock *pask;
+ struct algif_hash_tfm *tfm;
+ struct sock *sk = sock->sk;
+ struct alg_sock *ask = alg_sk(sk);
+
+ lock_sock(sk);
+ if (ask->refcnt)
+ goto unlock_child;
+
+ psk = ask->parent;
+ pask = alg_sk(ask->parent);
+ tfm = pask->private;
+
+ err = -ENOKEY;
+ lock_sock_nested(psk, SINGLE_DEPTH_NESTING);
+ if (!tfm->has_key)
+ goto unlock;
+
+ if (!pask->refcnt++)
+ sock_hold(psk);
+
+ ask->refcnt = 1;
+ sock_put(psk);
+
+ err = 0;
+
+unlock:
+ release_sock(psk);
+unlock_child:
+ release_sock(sk);
+
+ return err;
+}
+
+static int hash_sendmsg_nokey(struct socket *sock, struct msghdr *msg,
+ size_t size)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_sendmsg(sock, msg, size);
+}
+
+static ssize_t hash_sendpage_nokey(struct socket *sock, struct page *page,
+ int offset, size_t size, int flags)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_sendpage(sock, page, offset, size, flags);
+}
+
+static int hash_recvmsg_nokey(struct socket *sock, struct msghdr *msg,
+ size_t ignored, int flags)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_recvmsg(sock, msg, ignored, flags);
+}
+
+static int hash_accept_nokey(struct socket *sock, struct socket *newsock,
+ int flags)
+{
+ int err;
+
+ err = hash_check_key(sock);
+ if (err)
+ return err;
+
+ return hash_accept(sock, newsock, flags);
+}
+
+static struct proto_ops algif_hash_ops_nokey = {
+ .family = PF_ALG,
+
+ .connect = sock_no_connect,
+ .socketpair = sock_no_socketpair,
+ .getname = sock_no_getname,
+ .ioctl = sock_no_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = sock_no_shutdown,
+ .getsockopt = sock_no_getsockopt,
+ .mmap = sock_no_mmap,
+ .bind = sock_no_bind,
+ .setsockopt = sock_no_setsockopt,
+ .poll = sock_no_poll,
+
+ .release = af_alg_release,
+ .sendmsg = hash_sendmsg_nokey,
+ .sendpage = hash_sendpage_nokey,
+ .recvmsg = hash_recvmsg_nokey,
+ .accept = hash_accept_nokey,
+};
+
static void *hash_bind(const char *name, u32 type, u32 mask)
{
- return crypto_alloc_ahash(name, type, mask);
+ struct algif_hash_tfm *tfm;
+ struct crypto_ahash *hash;
+
+ tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+ if (!tfm)
+ return ERR_PTR(-ENOMEM);
+
+ hash = crypto_alloc_ahash(name, type, mask);
+ if (IS_ERR(hash)) {
+ kfree(tfm);
+ return ERR_CAST(hash);
+ }
+
+ tfm->hash = hash;
+
+ return tfm;
}
static void hash_release(void *private)
{
- crypto_free_ahash(private);
+ struct algif_hash_tfm *tfm = private;
+
+ crypto_free_ahash(tfm->hash);
+ kfree(tfm);
}
static int hash_setkey(void *private, const u8 *key, unsigned int keylen)
{
- return crypto_ahash_setkey(private, key, keylen);
+ struct algif_hash_tfm *tfm = private;
+ int err;
+
+ err = crypto_ahash_setkey(tfm->hash, key, keylen);
+ tfm->has_key = !err;
+
+ return err;
}
static void hash_sock_destruct(struct sock *sk)
struct alg_sock *ask = alg_sk(sk);
struct hash_ctx *ctx = ask->private;
- sock_kfree_s(sk, ctx->result,
- crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));
+ sock_kzfree_s(sk, ctx->result,
+ crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));
sock_kfree_s(sk, ctx, ctx->len);
af_alg_release_parent(sk);
}
-static int hash_accept_parent(void *private, struct sock *sk)
+static int hash_accept_parent_nokey(void *private, struct sock *sk)
{
struct hash_ctx *ctx;
struct alg_sock *ask = alg_sk(sk);
- unsigned len = sizeof(*ctx) + crypto_ahash_reqsize(private);
- unsigned ds = crypto_ahash_digestsize(private);
+ struct algif_hash_tfm *tfm = private;
+ struct crypto_ahash *hash = tfm->hash;
+ unsigned len = sizeof(*ctx) + crypto_ahash_reqsize(hash);
+ unsigned ds = crypto_ahash_digestsize(hash);
ctx = sock_kmalloc(sk, len, GFP_KERNEL);
if (!ctx)
ask->private = ctx;
- ahash_request_set_tfm(&ctx->req, private);
+ ahash_request_set_tfm(&ctx->req, hash);
ahash_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
af_alg_complete, &ctx->completion);
return 0;
}
+static int hash_accept_parent(void *private, struct sock *sk)
+{
+ struct algif_hash_tfm *tfm = private;
+
+ if (!tfm->has_key && crypto_ahash_has_setkey(tfm->hash))
+ return -ENOKEY;
+
+ return hash_accept_parent_nokey(private, sk);
+}
+
static const struct af_alg_type algif_type_hash = {
.bind = hash_bind,
.release = hash_release,
.setkey = hash_setkey,
.accept = hash_accept_parent,
+ .accept_nokey = hash_accept_parent_nokey,
.ops = &algif_hash_ops,
+ .ops_nokey = &algif_hash_ops_nokey,
.name = "hash",
.owner = THIS_MODULE
};