4.14-stable review patch. If anyone has any objections, please let me know.
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From: Aurelien Aptel aaptel@suse.com
commit 5fcd7f3f966f37f3f9a215af4cc1597fe338d0d5 upstream.
* 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@suse.com Signed-off-by: Steve French smfrench@gmail.com CC: Stable stable@vger.kernel.org Reviewed-by: Ronnie Sahlberg lsahlber@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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(+)
--- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -190,6 +190,7 @@ 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. --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -829,6 +829,11 @@ cifs_crypto_secmech_release(struct TCP_S 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_S server->secmech.sdeschmacmd5 = NULL; kfree(server->secmech.sdescmd5); server->secmech.sdescmd5 = NULL; + kfree(server->secmech.sdescsha512); + server->secmech.sdescsha512 = NULL; } --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -1476,6 +1476,7 @@ 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) --- 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 */ }; --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -203,4 +203,7 @@ extern int smb3_validate_negotiate(const
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 */ --- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -70,6 +70,36 @@ err: 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) {