diff options
| author | Steve French <smfrench@gmail.com> | 2017-09-25 20:11:58 -0500 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2017-10-18 11:52:39 -0500 |
| commit | 06e2290844fa408d3295ac03a1647f0798518ebe (patch) | |
| tree | 9e02b92b9935ee4b3bb735b682b713192f258cdb | |
| parent | 3e0cc09a3a2c40ec1ffb6b4e12da86e98feccb11 (diff) | |
Fix encryption labels and lengths for SMB3.1.1
SMB3.1.1 is most secure and recent dialect. Fixup labels and lengths
for sMB3.1.1 signing and encryption.
Signed-off-by: Steve French <smfrench@gmail.com>
CC: Stable <stable@vger.kernel.org>
| -rw-r--r-- | fs/cifs/cifsglob.h | 8 | ||||
| -rw-r--r-- | fs/cifs/smb2transport.c | 26 |
2 files changed, 20 insertions, 14 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index de5b2e1fcce5..e185b2853eab 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -661,7 +661,9 @@ struct TCP_Server_Info { #endif unsigned int max_read; unsigned int max_write; - __u8 preauth_hash[512]; +#ifdef CONFIG_CIFS_SMB311 + __u8 preauth_sha_hash[64]; /* save initital negprot hash */ +#endif /* 3.1.1 */ struct delayed_work reconnect; /* reconnect workqueue job */ struct mutex reconnect_mutex; /* prevent simultaneous reconnects */ unsigned long echo_interval; @@ -849,7 +851,9 @@ struct cifs_ses { __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE]; __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE]; __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE]; - __u8 preauth_hash[512]; +#ifdef CONFIG_CIFS_SMB311 + __u8 preauth_sha_hash[64]; +#endif /* 3.1.1 */ }; static inline bool diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c index 67367cf1f8cd..99493946e2f9 100644 --- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -390,6 +390,7 @@ generate_smb30signingkey(struct cifs_ses *ses) return generate_smb3signingkey(ses, &triplet); } +#ifdef CONFIG_CIFS_SMB311 int generate_smb311signingkey(struct cifs_ses *ses) @@ -398,25 +399,26 @@ generate_smb311signingkey(struct cifs_ses *ses) struct derivation *d; d = &triplet.signing; - d->label.iov_base = "SMB2AESCMAC"; - d->label.iov_len = 12; - d->context.iov_base = "SmbSign"; - d->context.iov_len = 8; + d->label.iov_base = "SMBSigningKey"; + d->label.iov_len = 14; + d->context.iov_base = ses->preauth_sha_hash; + d->context.iov_len = 64; d = &triplet.encryption; - d->label.iov_base = "SMB2AESCCM"; - d->label.iov_len = 11; - d->context.iov_base = "ServerIn "; - d->context.iov_len = 10; + d->label.iov_base = "SMBC2SCipherKey"; + d->label.iov_len = 16; + d->context.iov_base = ses->preauth_sha_hash; + d->context.iov_len = 64; d = &triplet.decryption; - d->label.iov_base = "SMB2AESCCM"; - d->label.iov_len = 11; - d->context.iov_base = "ServerOut"; - d->context.iov_len = 10; + d->label.iov_base = "SMBS2CCipherKey"; + d->label.iov_len = 16; + d->context.iov_base = ses->preauth_sha_hash; + d->context.iov_len = 64; return generate_smb3signingkey(ses, &triplet); } +#endif /* 311 */ int smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) |