* prepare for SMB3.11 pre-auth integrity
* enable sha512 when SMB311 is enabled in Kconfig
* add sha512 as a soft dependency
Signed-off-by: Aurelien Aptel <aaptel@xxxxxxxx>
---
fs/cifs/Kconfig | 1 +
fs/cifs/cifsencrypt.c | 7 +++++++
fs/cifs/cifsfs.c | 1 +
fs/cifs/cifsglob.h | 2 ++
fs/cifs/smb2proto.h | 3 +++
fs/cifs/smb2transport.c | 30 ++++++++++++++++++++++++++++++
6 files changed, 44 insertions(+)
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 687da62daf4e..e901ef6a4813 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -189,6 +189,7 @@ config CIFS_NFSD_EXPORT
config CIFS_SMB311
bool "SMB3.1.1 network file system support (Experimental)"
depends on CIFS
+ select CRYPTO_SHA512
help
This enables experimental support for the newest, SMB3.1.1, dialect.
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 478a145aa4d0..6fa6d459678e 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -829,6 +829,11 @@ cifs_crypto_secmech_release(struct TCP_Server_Info *server)
server->secmech.md5 = NULL;
}
+ if (server->secmech.md5) {
+ crypto_free_shash(server->secmech.sha512);
+ server->secmech.sha512 = NULL;
+ }
+
if (server->secmech.hmacmd5) {
crypto_free_shash(server->secmech.hmacmd5);
server->secmech.hmacmd5 = NULL;
@@ -852,4 +857,6 @@ cifs_crypto_secmech_release(struct TCP_Server_Info *server)
server->secmech.sdeschmacmd5 = NULL;
kfree(server->secmech.sdescmd5);
server->secmech.sdescmd5 = NULL;
+ kfree(server->secmech.sdescsha512);
+ server->secmech.sdescsha512 = NULL;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 32cdea67bbfd..f715609b13f3 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1486,6 +1486,7 @@ MODULE_SOFTDEP("pre: nls");
MODULE_SOFTDEP("pre: aes");
MODULE_SOFTDEP("pre: cmac");
MODULE_SOFTDEP("pre: sha256");
+MODULE_SOFTDEP("pre: sha512");
MODULE_SOFTDEP("pre: aead2");
MODULE_SOFTDEP("pre: ccm");
module_init(init_cifs)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 48f7c197cd2d..765fc2c9fd91 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -130,10 +130,12 @@ struct cifs_secmech {
struct crypto_shash *md5; /* md5 hash function */
struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
struct crypto_shash *cmacaes; /* block-cipher based MAC function */
+ struct crypto_shash *sha512; /* sha512 hash function */
struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
+ struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
};
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 05287b01f596..3b8e9c2e55bc 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -202,4 +202,7 @@ extern int smb3_validate_negotiate(const unsigned int, struct cifs_tcon *);
extern enum securityEnum smb2_select_sectype(struct TCP_Server_Info *,
enum securityEnum);
+#ifdef CONFIG_CIFS_SMB311
+extern int smb311_crypto_shash_allocate(struct TCP_Server_Info *server);
+#endif
#endif /* _SMB2PROTO_H */
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index c3c271f557a0..bf49cb73b9e6 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -70,6 +70,36 @@ smb3_crypto_shash_allocate(struct TCP_Server_Info *server)
return rc;
}
+#ifdef CONFIG_CIFS_SMB311
+int
+smb311_crypto_shash_allocate(struct TCP_Server_Info *server)
+{
+ struct cifs_secmech *p = &server->secmech;
+ int rc = 0;
+
+ rc = cifs_alloc_hash("hmac(sha256)",
+ &p->hmacsha256,
+ &p->sdeschmacsha256);
+ if (rc)
+ return rc;
+
+ rc = cifs_alloc_hash("cmac(aes)", &p->cmacaes, &p->sdesccmacaes);
+ if (rc)
+ goto err;
+
+ rc = cifs_alloc_hash("sha512", &p->sha512, &p->sdescsha512);
+ if (rc)
+ goto err;
+
+ return 0;
+
+err:
+ cifs_free_hash(&p->cmacaes, &p->sdesccmacaes);
+ cifs_free_hash(&p->hmacsha256, &p->sdeschmacsha256);
+ return rc;
+}
+#endif
+
static struct cifs_ses *
smb2_find_smb_ses_unlocked(struct TCP_Server_Info *server, __u64 ses_id)
{
--
2.12.3
--
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