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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-02 15:53:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-02 15:53:46 -0700
commit5a0387a8a8efb90ae7fea1e2e5c62de3efa74691 (patch)
tree9e5bbbafe7fea01c843d86c7c3d40f29f962c474 /crypto/algif_aead.c
parent204f144c9fcac355843412b6ba1150086488a208 (diff)
parent929562b144783b9212625305eadcbbd800809643 (diff)
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu: "Here is the crypto update for 4.12: API: - Add batch registration for acomp/scomp - Change acomp testing to non-unique compressed result - Extend algorithm name limit to 128 bytes - Require setkey before accept(2) in algif_aead Algorithms: - Add support for deflate rfc1950 (zlib) Drivers: - Add accelerated crct10dif for powerpc - Add crc32 in stm32 - Add sha384/sha512 in ccp - Add 3des/gcm(aes) for v5 devices in ccp - Add Queue Interface (QI) backend support in caam - Add new Exynos RNG driver - Add ThunderX ZIP driver - Add driver for hardware random generator on MT7623 SoC" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (101 commits) crypto: stm32 - Fix OF module alias information crypto: algif_aead - Require setkey before accept(2) crypto: scomp - add support for deflate rfc1950 (zlib) crypto: scomp - allow registration of multiple scomps crypto: ccp - Change ISR handler method for a v5 CCP crypto: ccp - Change ISR handler method for a v3 CCP crypto: crypto4xx - rename ce_ring_contol to ce_ring_control crypto: testmgr - Allow ecb(cipher_null) in FIPS mode Revert "crypto: arm64/sha - Add constant operand modifier to ASM_EXPORT" crypto: ccp - Disable interrupts early on unload crypto: ccp - Use only the relevant interrupt bits hwrng: mtk - Add driver for hardware random generator on MT7623 SoC dt-bindings: hwrng: Add Mediatek hardware random generator bindings crypto: crct10dif-vpmsum - Fix missing preempt_disable() crypto: testmgr - replace compression known answer test crypto: acomp - allow registration of multiple acomps hwrng: n2 - Use devm_kcalloc() in n2rng_probe() crypto: chcr - Fix error handling related to 'chcr_alloc_shash' padata: get_next is never NULL crypto: exynos - Add new Exynos RNG driver ...
Diffstat (limited to 'crypto/algif_aead.c')
-rw-r--r--crypto/algif_aead.c157
1 files changed, 149 insertions, 8 deletions
diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c
index ef59d9926ee9..8af664f7d27c 100644
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -45,6 +45,11 @@ struct aead_async_req {
char iv[];
};
+struct aead_tfm {
+ struct crypto_aead *aead;
+ bool has_key;
+};
+
struct aead_ctx {
struct aead_sg_list tsgl;
struct aead_async_rsgl first_rsgl;
@@ -723,24 +728,146 @@ static struct proto_ops algif_aead_ops = {
.poll = aead_poll,
};
+static int aead_check_key(struct socket *sock)
+{
+ int err = 0;
+ struct sock *psk;
+ struct alg_sock *pask;
+ struct aead_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 aead_sendmsg_nokey(struct socket *sock, struct msghdr *msg,
+ size_t size)
+{
+ int err;
+
+ err = aead_check_key(sock);
+ if (err)
+ return err;
+
+ return aead_sendmsg(sock, msg, size);
+}
+
+static ssize_t aead_sendpage_nokey(struct socket *sock, struct page *page,
+ int offset, size_t size, int flags)
+{
+ int err;
+
+ err = aead_check_key(sock);
+ if (err)
+ return err;
+
+ return aead_sendpage(sock, page, offset, size, flags);
+}
+
+static int aead_recvmsg_nokey(struct socket *sock, struct msghdr *msg,
+ size_t ignored, int flags)
+{
+ int err;
+
+ err = aead_check_key(sock);
+ if (err)
+ return err;
+
+ return aead_recvmsg(sock, msg, ignored, flags);
+}
+
+static struct proto_ops algif_aead_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,
+ .accept = sock_no_accept,
+ .setsockopt = sock_no_setsockopt,
+
+ .release = af_alg_release,
+ .sendmsg = aead_sendmsg_nokey,
+ .sendpage = aead_sendpage_nokey,
+ .recvmsg = aead_recvmsg_nokey,
+ .poll = aead_poll,
+};
+
static void *aead_bind(const char *name, u32 type, u32 mask)
{
- return crypto_alloc_aead(name, type, mask);
+ struct aead_tfm *tfm;
+ struct crypto_aead *aead;
+
+ tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+ if (!tfm)
+ return ERR_PTR(-ENOMEM);
+
+ aead = crypto_alloc_aead(name, type, mask);
+ if (IS_ERR(aead)) {
+ kfree(tfm);
+ return ERR_CAST(aead);
+ }
+
+ tfm->aead = aead;
+
+ return tfm;
}
static void aead_release(void *private)
{
- crypto_free_aead(private);
+ struct aead_tfm *tfm = private;
+
+ crypto_free_aead(tfm->aead);
+ kfree(tfm);
}
static int aead_setauthsize(void *private, unsigned int authsize)
{
- return crypto_aead_setauthsize(private, authsize);
+ struct aead_tfm *tfm = private;
+
+ return crypto_aead_setauthsize(tfm->aead, authsize);
}
static int aead_setkey(void *private, const u8 *key, unsigned int keylen)
{
- return crypto_aead_setkey(private, key, keylen);
+ struct aead_tfm *tfm = private;
+ int err;
+
+ err = crypto_aead_setkey(tfm->aead, key, keylen);
+ tfm->has_key = !err;
+
+ return err;
}
static void aead_sock_destruct(struct sock *sk)
@@ -757,12 +884,14 @@ static void aead_sock_destruct(struct sock *sk)
af_alg_release_parent(sk);
}
-static int aead_accept_parent(void *private, struct sock *sk)
+static int aead_accept_parent_nokey(void *private, struct sock *sk)
{
struct aead_ctx *ctx;
struct alg_sock *ask = alg_sk(sk);
- unsigned int len = sizeof(*ctx) + crypto_aead_reqsize(private);
- unsigned int ivlen = crypto_aead_ivsize(private);
+ struct aead_tfm *tfm = private;
+ struct crypto_aead *aead = tfm->aead;
+ unsigned int len = sizeof(*ctx) + crypto_aead_reqsize(aead);
+ unsigned int ivlen = crypto_aead_ivsize(aead);
ctx = sock_kmalloc(sk, len, GFP_KERNEL);
if (!ctx)
@@ -789,7 +918,7 @@ static int aead_accept_parent(void *private, struct sock *sk)
ask->private = ctx;
- aead_request_set_tfm(&ctx->aead_req, private);
+ aead_request_set_tfm(&ctx->aead_req, aead);
aead_request_set_callback(&ctx->aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG,
af_alg_complete, &ctx->completion);
@@ -798,13 +927,25 @@ static int aead_accept_parent(void *private, struct sock *sk)
return 0;
}
+static int aead_accept_parent(void *private, struct sock *sk)
+{
+ struct aead_tfm *tfm = private;
+
+ if (!tfm->has_key)
+ return -ENOKEY;
+
+ return aead_accept_parent_nokey(private, sk);
+}
+
static const struct af_alg_type algif_type_aead = {
.bind = aead_bind,
.release = aead_release,
.setkey = aead_setkey,
.setauthsize = aead_setauthsize,
.accept = aead_accept_parent,
+ .accept_nokey = aead_accept_parent_nokey,
.ops = &algif_aead_ops,
+ .ops_nokey = &algif_aead_ops_nokey,
.name = "aead",
.owner = THIS_MODULE
};