On Mon, 13 Sep 2010 14:15:10 -0500
shirishpargaonkar@xxxxxxxxx wrote:
> From: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
>
>
> Change name of variable mac_key to session key.
> The reason mac_key was changed to session key is, this structure does not
> hold message authentication code, it holds the session key (for ntlmv2,
> ntlmv1 etc.). mac is generated as a signature in cifs_calc* functions.
>
>
> Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
> ---
> fs/cifs/cifsencrypt.c | 22 +++++++++++-----------
> fs/cifs/cifsglob.h | 4 ++--
> fs/cifs/cifsproto.h | 4 ++--
> fs/cifs/sess.c | 10 +++++-----
> fs/cifs/transport.c | 6 +++---
> 5 files changed, 23 insertions(+), 23 deletions(-)
>
> diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
> index 35042d8..eed70ca 100644
> --- a/fs/cifs/cifsencrypt.c
> +++ b/fs/cifs/cifsencrypt.c
> @@ -42,7 +42,7 @@ extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
> unsigned char *p24);
>
> static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
> - const struct mac_key *key, char *signature)
> + const struct session_key *key, char *signature)
> {
> struct MD5Context context;
>
> @@ -78,7 +78,7 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
> server->sequence_number++;
> spin_unlock(&GlobalMid_Lock);
>
> - rc = cifs_calculate_signature(cifs_pdu, &server->mac_signing_key,
> + rc = cifs_calculate_signature(cifs_pdu, &server->session_key,
> smb_signature);
> if (rc)
> memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
> @@ -89,7 +89,7 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
> }
>
> static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
> - const struct mac_key *key, char *signature)
> + const struct session_key *key, char *signature)
> {
> struct MD5Context context;
> int i;
> @@ -145,7 +145,7 @@ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
> server->sequence_number++;
> spin_unlock(&GlobalMid_Lock);
>
> - rc = cifs_calc_signature2(iov, n_vec, &server->mac_signing_key,
> + rc = cifs_calc_signature2(iov, n_vec, &server->session_key,
> smb_signature);
> if (rc)
> memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
> @@ -156,14 +156,14 @@ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
> }
>
> int cifs_verify_signature(struct smb_hdr *cifs_pdu,
> - const struct mac_key *mac_key,
> + const struct session_key *session_key,
> __u32 expected_sequence_number)
> {
> unsigned int rc;
> char server_response_sig[8];
> char what_we_think_sig_should_be[20];
>
> - if ((cifs_pdu == NULL) || (mac_key == NULL))
> + if (cifs_pdu == NULL || session_key == NULL)
> return -EINVAL;
>
> if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
> @@ -192,7 +192,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu,
> cpu_to_le32(expected_sequence_number);
> cifs_pdu->Signature.Sequence.Reserved = 0;
>
> - rc = cifs_calculate_signature(cifs_pdu, mac_key,
> + rc = cifs_calculate_signature(cifs_pdu, session_key,
> what_we_think_sig_should_be);
>
> if (rc)
> @@ -209,7 +209,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu,
> }
>
> /* We fill in key by putting in 40 byte array which was allocated by caller */
> -int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
> +int cifs_calculate_session_key(struct session_key *key, const char *rn,
> const char *password)
> {
> char temp_key[16];
> @@ -347,11 +347,11 @@ void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
> /* now calculate the MAC key for NTLMv2 */
> hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
> hmac_md5_update(resp_buf, 16, &context);
> - hmac_md5_final(ses->server->mac_signing_key.data.ntlmv2.key, &context);
> + hmac_md5_final(ses->server->session_key.data.ntlmv2.key, &context);
>
> - memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
> + memcpy(&ses->server->session_key.data.ntlmv2.resp, resp_buf,
> sizeof(struct ntlmv2_resp));
> - ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
> + ses->server->session_key.len = 16 + sizeof(struct ntlmv2_resp);
> }
>
> void CalcNTLMv2_response(const struct cifsSesInfo *ses,
> diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
> index 0cdfb8c..14dfa9a 100644
> --- a/fs/cifs/cifsglob.h
> +++ b/fs/cifs/cifsglob.h
> @@ -97,7 +97,7 @@ enum protocolEnum {
> /* Netbios frames protocol not supported at this time */
> };
>
> -struct mac_key {
> +struct session_key {
> unsigned int len;
> union {
> char ntlm[CIFS_SESS_KEY_SIZE + 16];
> @@ -182,7 +182,7 @@ struct TCP_Server_Info {
> /* 16th byte of RFC1001 workstation name is always null */
> char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
> __u32 sequence_number; /* needed for CIFS PDU signature */
> - struct mac_key mac_signing_key;
> + struct session_key session_key;
> char ntlmv2_hash[16];
> unsigned long lstrp; /* when we got last response from this server */
> u16 dialect; /* dialect index that server chose */
> diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
> index 1d60c65..3f4fa81 100644
> --- a/fs/cifs/cifsproto.h
> +++ b/fs/cifs/cifsproto.h
> @@ -362,9 +362,9 @@ extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *);
> extern int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *,
> __u32 *);
> extern int cifs_verify_signature(struct smb_hdr *,
> - const struct mac_key *mac_key,
> + const struct session_key *session_key,
> __u32 expected_sequence_number);
> -extern int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
> +extern int cifs_calculate_session_key(struct session_key *key, const char *rn,
> const char *pass);
> extern void CalcNTLMv2_response(const struct cifsSesInfo *, char *);
> extern void setup_ntlmv2_rsp(struct cifsSesInfo *, char *,
> diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
> index 0a57cb7..8882012 100644
> --- a/fs/cifs/sess.c
> +++ b/fs/cifs/sess.c
> @@ -480,7 +480,7 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
> /* calculate session key, BB what about adding similar ntlmv2 path? */
> SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key);
> if (first)
> - cifs_calculate_mac_key(&ses->server->mac_signing_key,
> + cifs_calculate_session_key(&ses->server->session_key,
> ntlm_session_key, ses->password);
>
> memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE);
> @@ -690,7 +690,7 @@ ssetup_ntlmssp_authenticate:
>
> if (first_time) /* should this be moved into common code
> with similar ntlmv2 path? */
> - cifs_calculate_mac_key(&ses->server->mac_signing_key,
> + cifs_calculate_session_key(&ses->server->session_key,
> ntlm_session_key, ses->password);
> /* copy session key */
>
> @@ -765,15 +765,15 @@ ssetup_ntlmssp_authenticate:
> }
> /* bail out if key is too long */
> if (msg->sesskey_len >
> - sizeof(ses->server->mac_signing_key.data.krb5)) {
> + sizeof(ses->server->session_key.data.krb5)) {
> cERROR(1, "Kerberos signing key too long (%u bytes)",
> msg->sesskey_len);
> rc = -EOVERFLOW;
> goto ssetup_exit;
> }
> if (first_time) {
> - ses->server->mac_signing_key.len = msg->sesskey_len;
> - memcpy(ses->server->mac_signing_key.data.krb5,
> + ses->server->session_key.len = msg->sesskey_len;
> + memcpy(ses->server->session_key.data.krb5,
> msg->data, msg->sesskey_len);
> }
> pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
> diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
> index 82f78c4..a66c91e 100644
> --- a/fs/cifs/transport.c
> +++ b/fs/cifs/transport.c
> @@ -543,7 +543,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
> (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
> SECMODE_SIGN_ENABLED))) {
> rc = cifs_verify_signature(midQ->resp_buf,
> - &ses->server->mac_signing_key,
> + &ses->server->session_key,
> midQ->sequence_number+1);
> if (rc) {
> cERROR(1, "Unexpected SMB signature");
> @@ -731,7 +731,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
> (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
> SECMODE_SIGN_ENABLED))) {
> rc = cifs_verify_signature(out_buf,
> - &ses->server->mac_signing_key,
> + &ses->server->session_key,
> midQ->sequence_number+1);
> if (rc) {
> cERROR(1, "Unexpected SMB signature");
> @@ -981,7 +981,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
> (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
> SECMODE_SIGN_ENABLED))) {
> rc = cifs_verify_signature(out_buf,
> - &ses->server->mac_signing_key,
> + &ses->server->session_key,
> midQ->sequence_number+1);
> if (rc) {
> cERROR(1, "Unexpected SMB signature");
Thanks for splitting that out. It should make the later patches more
clear.
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
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