[PATCH] enable signing for ntlmv2 within NTLMSSP
Shirish Pargaonkar
shirishpargaonkar at gmail.com
Sat Jul 31 13:18:02 MDT 2010
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar at gmail.com>
---
fs/cifs/cifsencrypt.c | 332 +++++++++++++++++++++++++++++++------------------
fs/cifs/cifsglob.h | 12 ++
fs/cifs/cifsproto.h | 10 +-
fs/cifs/connect.c | 11 ++-
fs/cifs/sess.c | 31 ++++-
fs/cifs/transport.c | 6 +-
6 files changed, 269 insertions(+), 133 deletions(-)
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 61cf380..f99009b 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -43,21 +43,43 @@ 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)
+ struct TCP_Server_Info *server, char *signature)
{
- struct MD5Context context;
+ int rc = 0;
+ struct scatterlist sgin[2];
+ struct hash_desc desc;
- if ((cifs_pdu == NULL) || (signature == NULL) || (key == NULL))
+ if (cifs_pdu == NULL || server == NULL || signature == NULL)
return -EINVAL;
- cifs_MD5_init(&context);
- cifs_MD5_update(&context, (char *)&key->data, key->len);
- cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
+ desc.tfm = server->ntlmssp.tfm_md5;
+
+ rc = crypto_hash_init(&desc);
+ if (rc) {
+ cERROR(1, "could not initialize master crypto API hmacmd5\n");
+ return rc;
+ }
+
+ if (server->secType == RawNTLMSSP) {
+ sg_init_one(&sgin[0], server->mac_signing_key.data.ntlmv2.key,
+ CIFS_NTLMV2_SESSKEY_SIZE);
+ crypto_hash_update(&desc, &sgin[0], CIFS_NTLMV2_SESSKEY_SIZE);
+ } else {
+ sg_init_one(&sgin[0], &server->mac_signing_key.data,
+ server->mac_signing_key.len);
+ crypto_hash_update(&desc, &sgin[0],
+ server->mac_signing_key.len);
+ }
+
+ sg_init_one(&sgin[1], cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
+ crypto_hash_update(&desc, &sgin[1], cifs_pdu->smb_buf_length);
+
+ rc = crypto_hash_final(&desc, signature);
- cifs_MD5_final(signature, &context);
return 0;
}
+
int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
__u32 *pexpected_response_sequence_number)
{
@@ -79,8 +101,7 @@ 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,
- smb_signature);
+ rc = cifs_calculate_signature(cifs_pdu, server, smb_signature);
if (rc)
memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
else
@@ -90,16 +111,35 @@ 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)
+ struct TCP_Server_Info *server, char *signature)
{
- struct MD5Context context;
int i;
+ int rc = 0;
+ struct scatterlist sgin[n_vec + 1];
+ struct hash_desc desc;
- if ((iov == NULL) || (signature == NULL) || (key == NULL))
+ if (iov == NULL || server == NULL || signature == NULL)
return -EINVAL;
- cifs_MD5_init(&context);
- cifs_MD5_update(&context, (char *)&key->data, key->len);
+ desc.tfm = server->ntlmssp.tfm_md5;
+
+ rc = crypto_hash_init(&desc);
+ if (rc) {
+ cERROR(1, "could not initialize master crypto API hmacmd5\n");
+ return rc;
+ }
+
+ if (server->secType == RawNTLMSSP) {
+ sg_init_one(&sgin[0], server->mac_signing_key.data.ntlmv2.key,
+ CIFS_NTLMV2_SESSKEY_SIZE);
+ crypto_hash_update(&desc, &sgin[0], CIFS_NTLMV2_SESSKEY_SIZE);
+ } else {
+ sg_init_one(&sgin[0], &server->mac_signing_key.data,
+ server->mac_signing_key.len);
+ crypto_hash_update(&desc, &sgin[0],
+ server->mac_signing_key.len);
+ }
+
for (i = 0; i < n_vec; i++) {
if (iov[i].iov_len == 0)
continue;
@@ -112,18 +152,23 @@ static int cifs_calc_signature2(const struct kvec *iov, int n_vec,
if (i == 0) {
if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
break; /* nothing to sign or corrupt header */
- cifs_MD5_update(&context, iov[0].iov_base+4,
- iov[0].iov_len-4);
- } else
- cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
+ sg_init_one(&sgin[i + 1], iov[i].iov_base + 4,
+ iov[i].iov_len - 4);
+ crypto_hash_update(&desc, &sgin[i + 1],
+ iov[i].iov_len - 4);
+ } else {
+ sg_init_one(&sgin[i + 1], iov[i].iov_base,
+ iov[i].iov_len);
+ crypto_hash_update(&desc, &sgin[i + 1],
+ iov[i].iov_len);
+ }
}
- cifs_MD5_final(signature, &context);
+ rc = crypto_hash_final(&desc, signature);
return 0;
}
-
int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
__u32 *pexpected_response_sequence_number)
{
@@ -146,8 +191,7 @@ 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,
- smb_signature);
+ rc = cifs_calc_signature2(iov, n_vec, server, smb_signature);
if (rc)
memset(cifs_pdu->Signature.SecuritySignature, 0, 8);
else
@@ -157,14 +201,14 @@ 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,
+ struct TCP_Server_Info *server,
__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 || server == NULL)
return -EINVAL;
if (cifs_pdu->Command == SMB_COM_NEGOTIATE)
@@ -193,7 +237,7 @@ 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, server,
what_we_think_sig_should_be);
if (rc)
@@ -224,63 +268,6 @@ int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
return 0;
}
-int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses,
- const struct nls_table *nls_info)
-{
- char temp_hash[16];
- struct HMACMD5Context ctx;
- char *ucase_buf;
- __le16 *unicode_buf;
- unsigned int i, user_name_len, dom_name_len;
-
- if (ses == NULL)
- return -EINVAL;
-
- E_md4hash(ses->password, temp_hash);
-
- hmac_md5_init_limK_to_64(temp_hash, 16, &ctx);
- user_name_len = strlen(ses->userName);
- if (user_name_len > MAX_USERNAME_SIZE)
- return -EINVAL;
- if (ses->domainName == NULL)
- return -EINVAL; /* BB should we use CIFS_LINUX_DOM */
- dom_name_len = strlen(ses->domainName);
- if (dom_name_len > MAX_USERNAME_SIZE)
- return -EINVAL;
-
- ucase_buf = kmalloc((MAX_USERNAME_SIZE+1), GFP_KERNEL);
- if (ucase_buf == NULL)
- return -ENOMEM;
- unicode_buf = kmalloc((MAX_USERNAME_SIZE+1)*4, GFP_KERNEL);
- if (unicode_buf == NULL) {
- kfree(ucase_buf);
- return -ENOMEM;
- }
-
- for (i = 0; i < user_name_len; i++)
- ucase_buf[i] = nls_info->charset2upper[(int)ses->userName[i]];
- ucase_buf[i] = 0;
- user_name_len = cifs_strtoUCS(unicode_buf, ucase_buf,
- MAX_USERNAME_SIZE*2, nls_info);
- unicode_buf[user_name_len] = 0;
- user_name_len++;
-
- for (i = 0; i < dom_name_len; i++)
- ucase_buf[i] = nls_info->charset2upper[(int)ses->domainName[i]];
- ucase_buf[i] = 0;
- dom_name_len = cifs_strtoUCS(unicode_buf+user_name_len, ucase_buf,
- MAX_USERNAME_SIZE*2, nls_info);
-
- unicode_buf[user_name_len + dom_name_len] = 0;
- hmac_md5_update((const unsigned char *) unicode_buf,
- (user_name_len+dom_name_len)*2, &ctx);
-
- hmac_md5_final(ses->server->ntlmv2_hash, &ctx);
- kfree(ucase_buf);
- kfree(unicode_buf);
- return 0;
-}
-
#ifdef CONFIG_CIFS_WEAK_PW_HASH
void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
char *lnm_session_key)
@@ -325,21 +312,25 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
{
int rc = 0;
int len;
- char nt_hash[16];
- struct HMACMD5Context *pctxt;
+ char nt_hash[CIFS_NTHASH_SIZE];
wchar_t *user;
wchar_t *domain;
-
- pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);
-
- if (pctxt == NULL)
- return -ENOMEM;
+ struct hash_desc desc;
+ struct scatterlist sgin[2];
/* calculate md4 hash of password */
E_md4hash(ses->password, nt_hash);
- /* convert Domainname to unicode and uppercase */
- hmac_md5_init_limK_to_64(nt_hash, 16, pctxt);
+ desc.tfm = ses->server->ntlmssp.tfm_hmacmd5;
+
+ crypto_hash_setkey(ses->server->ntlmssp.tfm_hmacmd5, nt_hash,
+ CIFS_NTHASH_SIZE);
+
+ rc = crypto_hash_init(&desc);
+ if (rc) {
+ cERROR(1, "could not initialize master crypto API hmacmd5\n");
+ return rc;
+ }
/* convert ses->userName to unicode and uppercase */
len = strlen(ses->userName);
@@ -348,7 +339,9 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
goto calc_exit_2;
len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
UniStrupr(user);
- hmac_md5_update((char *)user, 2*len, pctxt);
+
+ sg_init_one(&sgin[0], user, 2 * len);
+ crypto_hash_update(&desc, &sgin[0], 2 * len);
/* convert ses->domainName to unicode and uppercase */
if (ses->domainName) {
@@ -364,7 +357,8 @@ static int calc_ntlmv2_hash(struct cifsSesInfo *ses,
Maybe converting the domain name earlier makes sense */
/* UniStrupr(domain); */
- hmac_md5_update((char *)domain, 2*len, pctxt);
+ sg_init_one(&sgin[1], domain, 2 * len);
+ crypto_hash_update(&desc, &sgin[1], 2 * len);
kfree(domain);
}
@@ -373,9 +367,8 @@ calc_exit_1:
calc_exit_2:
/* BB FIXME what about bytes 24 through 40 of the signing key?
compare with the NTLM example */
- hmac_md5_final(ses->server->ntlmv2_hash, pctxt);
+ rc = crypto_hash_final(&desc, ses->server->ntlmv2_hash);
- kfree(pctxt);
return rc;
}
@@ -417,12 +410,50 @@ find_domain_name(struct cifsSesInfo *ses)
return;
}
-void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
- const struct nls_table *nls_cp)
+static int
+CalcNTLMv2_response(const struct TCP_Server_Info *server,
+ char *v2_session_response)
{
int rc;
+ struct hash_desc desc;
+ struct scatterlist sgin[2];
+
+ desc.tfm = server->ntlmssp.tfm_hmacmd5;
+
+ crypto_hash_setkey(server->ntlmssp.tfm_hmacmd5, server->ntlmv2_hash,
+ CIFS_HMAC_MD5_HASH_SIZE);
+
+ rc = crypto_hash_init(&desc);
+ if (rc) {
+ cERROR(1, "could not initialize master crypto API hmacmd5\n");
+ return rc;
+ }
+
+ memcpy(v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
+ server->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
+ sg_init_one(&sgin[0], v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
+ sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);
+ crypto_hash_update(&desc, &sgin[0],
+ sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);
+
+ if (server->tilen) {
+ sg_init_one(&sgin[1], server->tiblob, server->tilen);
+ crypto_hash_update(&desc, &sgin[1], server->tilen);
+ }
+
+ rc = crypto_hash_final(&desc, v2_session_response);
+
+ return rc;
+}
+
+int
+setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
+ const struct nls_table *nls_cp)
+{
+ int rc = 0;
+ struct hash_desc desc;
+ struct scatterlist sgin;
struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
- struct HMACMD5Context context;
buf->blob_signature = cpu_to_le32(0x00000101);
buf->reserved = 0;
@@ -437,32 +468,95 @@ void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
rc = calc_ntlmv2_hash(ses, nls_cp);
if (rc)
cERROR(1, "could not get v2 hash rc %d", rc);
- CalcNTLMv2_response(ses, resp_buf);
+ rc = CalcNTLMv2_response(ses->server, resp_buf);
+
+ desc.tfm = ses->server->ntlmssp.tfm_hmacmd5;
- /* 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);
+ crypto_hash_setkey(ses->server->ntlmssp.tfm_hmacmd5,
+ ses->server->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
+
+ rc = crypto_hash_init(&desc);
+ if (rc) {
+ cERROR(1, "could not initialize master crypto API hmacmd5\n");
+ return rc;
+ }
+
+ sg_init_one(&sgin, resp_buf, CIFS_HMAC_MD5_HASH_SIZE);
+ crypto_hash_update(&desc, &sgin, CIFS_HMAC_MD5_HASH_SIZE);
+
+ rc = crypto_hash_final(&desc,
+ ses->server->mac_signing_key.data.ntlmv2.key);
memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
- sizeof(struct ntlmv2_resp));
+ sizeof(struct ntlmv2_resp));
ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
+
+ return rc;
}
-void CalcNTLMv2_response(const struct cifsSesInfo *ses,
- char *v2_session_response)
+int
+calc_seckey(struct TCP_Server_Info *server)
{
- struct HMACMD5Context context;
- /* rest of v2 struct already generated */
- memcpy(v2_session_response + 8, ses->server->cryptKey, 8);
- hmac_md5_init_limK_to_64(ses->server->ntlmv2_hash, 16, &context);
-
- hmac_md5_update(v2_session_response+8,
- sizeof(struct ntlmv2_resp) - 8, &context);
- if (ses->server->tilen)
- hmac_md5_update(ses->server->tiblob,
- ses->server->tilen, &context);
-
- hmac_md5_final(v2_session_response, &context);
-/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
+ unsigned int rc;
+ unsigned char sec_key[CIFS_NTLMV2_SESSKEY_SIZE];
+ struct crypto_blkcipher *tfm_arc4;
+ struct scatterlist sgin, sgout;
+ struct blkcipher_desc desc;
+
+ get_random_bytes(sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
+
+ tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)",
+ 0, CRYPTO_ALG_ASYNC);
+ if (!tfm_arc4 || IS_ERR(tfm_arc4)) {
+ cERROR(1, "could not allocate " "master crypto API arc4\n");
+ return 1;
+ }
+
+ desc.tfm = tfm_arc4;
+
+ crypto_blkcipher_setkey(tfm_arc4,
+ server->mac_signing_key.data.ntlmv2.key, CIFS_CPHTXT_SIZE);
+ sg_init_one(&sgin, sec_key, CIFS_CPHTXT_SIZE);
+ sg_init_one(&sgout, server->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
+ rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE);
+
+ if (!rc) {
+ memcpy(server->mac_signing_key.data.ntlmv2.key,
+ sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
+ }
+
+ crypto_free_blkcipher(tfm_arc4);
+
+ return 0;
+}
+
+void
+cifs_crypto_hash_release(struct TCP_Server_Info *server)
+{
+ if (server->ntlmssp.tfm_hmacmd5)
+ crypto_free_hash(server->ntlmssp.tfm_hmacmd5);
+
+ if (server->ntlmssp.tfm_md5)
+ crypto_free_hash(server->ntlmssp.tfm_md5);
+}
+
+int
+cifs_crypto_hash_allocate(struct TCP_Server_Info *server)
+{
+ server->ntlmssp.tfm_hmacmd5 = crypto_alloc_hash("hmac(md5)",
+ 0, CRYPTO_ALG_ASYNC);
+ if (!server->ntlmssp.tfm_hmacmd5 ||
+ IS_ERR(server->ntlmssp.tfm_hmacmd5)) {
+ cERROR(1, "could not allocate master crypto API hmacmd5\n");
+ return 1;
+ }
+
+ server->ntlmssp.tfm_md5 = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);
+ if (!server->ntlmssp.tfm_md5 || IS_ERR(server->ntlmssp.tfm_md5)) {
+ crypto_free_hash(server->ntlmssp.tfm_hmacmd5);
+ cERROR(1, "could not allocate master crypto API md5\n");
+ return 1;
+ }
+
+ return 0;
}
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index c4c5175..488b806 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -25,6 +25,9 @@
#include <linux/slow-work.h>
#include "cifs_fs_sb.h"
#include "cifsacl.h"
+#include <linux/crypto.h>
+#include <linux/scatterlist.h>
+
/*
* The sizes of various internal tables and strings
*/
@@ -120,6 +123,14 @@ struct cifs_cred {
struct cifs_ace *aces;
};
+struct ntlmssp_auth {
+ __u32 client_flags;
+ __u32 server_flags;
+ unsigned char ciphertext[CIFS_CPHTXT_SIZE];
+ struct crypto_hash *tfm_hmacmd5;
+ struct crypto_hash *tfm_md5;
+};
+
/*
*****************************************************************
* Except the CIFS PDUs themselves all the
@@ -189,6 +200,7 @@ struct TCP_Server_Info {
/* extended security flavors that server supports */
unsigned int tilen; /* length of the target info blob */
unsigned char *tiblob; /* target info blob in challenge response */
+ struct ntlmssp_auth ntlmssp; /* various keys, ciphers, flags */
bool sec_kerberos; /* supports plain Kerberos */
bool sec_mskerberos; /* supports legacy MS Kerberos */
bool sec_kerberosu2u; /* supports U2U Kerberos */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 2eaebbd..b1463bd 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -361,15 +361,15 @@ 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,
+ struct TCP_Server_Info *server,
__u32 expected_sequence_number);
extern int cifs_calculate_mac_key(struct mac_key *key, const char *rn,
const char *pass);
-extern int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *,
- const struct nls_table *);
-extern void CalcNTLMv2_response(const struct cifsSesInfo *, char *);
-extern void setup_ntlmv2_rsp(struct cifsSesInfo *, char *,
+extern int setup_ntlmv2_rsp(struct cifsSesInfo *, char *,
const struct nls_table *);
+extern int cifs_crypto_hash_allocate(struct TCP_Server_Info *);
+extern void cifs_crypto_hash_release(struct TCP_Server_Info *);
+extern int calc_seckey(struct TCP_Server_Info *);
#ifdef CONFIG_CIFS_WEAK_PW_HASH
extern void calc_lanman_hash(const char *password, const char *cryptkey,
bool encrypt, char *lnm_session_key);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2a43a0a..f8b2052 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1705,6 +1705,7 @@ cifs_put_smb_ses(struct cifsSesInfo *ses)
CIFSSMBLogoff(xid, ses);
_FreeXid(xid);
}
+ cifs_crypto_hash_release(server);
sesInfoFree(ses);
cifs_put_tcp_session(server);
}
@@ -1784,13 +1785,21 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
ses->linux_uid = volume_info->linux_uid;
ses->overrideSecFlg = volume_info->secFlg;
+ rc = cifs_crypto_hash_allocate(server);
+ if (rc) {
+ cERROR(1, "could not setup hash structures rc %d", rc);
+ goto get_ses_fail;
+ }
+
mutex_lock(&ses->session_mutex);
rc = cifs_negotiate_protocol(xid, ses);
if (!rc)
rc = cifs_setup_session(xid, ses, volume_info->local_nls);
mutex_unlock(&ses->session_mutex);
- if (rc)
+ if (rc) {
+ cifs_crypto_hash_release(ses->server);
goto get_ses_fail;
+ }
/* success, put it on the list */
write_lock(&cifs_tcp_ses_lock);
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 32871a5..04d30cc 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -466,6 +466,7 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
struct cifsSesInfo *ses,
const struct nls_table *nls_cp, bool first)
{
+ int rc;
unsigned int size;
AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
__u32 flags;
@@ -494,13 +495,16 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
sec_blob->LmChallengeResponse.MaximumLength = 0;
sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
- setup_ntlmv2_rsp(ses, (char *)&ntlmv2_response, nls_cp);
+ rc = setup_ntlmv2_rsp(ses, (char *)&ntlmv2_response, nls_cp);
+ if (rc) {
+ cERROR(1, "error rc: %d during ntlmssp ntlmv2 setup", rc);
+ goto setup_ntlmv2_ret;
+ }
size = sizeof(struct ntlmv2_resp);
memcpy(tmp, (char *)&ntlmv2_response, size);
tmp += size;
if (ses->server->tilen > 0) {
memcpy(tmp, ses->server->tiblob, ses->server->tilen);
- kfree(ses->server->tiblob);
tmp += ses->server->tilen;
} else
ses->server->tilen = 0;
@@ -547,9 +551,26 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
sec_blob->WorkstationName.MaximumLength = 0;
tmp += 2;
- sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
- sec_blob->SessionKey.Length = 0;
- sec_blob->SessionKey.MaximumLength = 0;
+ if ((ses->server->ntlmssp.server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) &&
+ !calc_seckey(ses->server)) {
+ memcpy(tmp, ses->server->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE);
+ sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
+ sec_blob->SessionKey.MaximumLength =
+ cpu_to_le16(CIFS_CPHTXT_SIZE);
+ tmp += CIFS_CPHTXT_SIZE;
+ } else {
+ sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->SessionKey.Length = 0;
+ sec_blob->SessionKey.MaximumLength = 0;
+ }
+
+ ses->server->sequence_number = 0;
+
+setup_ntlmv2_ret:
+ if (ses->server->tilen > 0)
+ kfree(ses->server->tiblob);
+
return tmp - pbuffer;
}
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 82f78c4..e0588cd 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,
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,
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,
midQ->sequence_number+1);
if (rc) {
cERROR(1, "Unexpected SMB signature");
--
1.6.0.2
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