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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  Eliminate sparse warning - bad constant expression
  cifs: check for NULL session password
  missing changes during ntlmv2/ntlmssp auth and sign
  [CIFS] Fix ntlmv2 auth with ntlmssp
  cifs: correction of unicode header files
  cifs: fix NULL pointer dereference in cifs_find_smb_ses
  cifs: consolidate error handling in several functions
  cifs: clean up error handling in cifs_mknod
This commit is contained in:
Linus Torvalds 2010-08-25 09:57:59 -07:00
parent 5a559057b4 2d20ca8358
commit 37822188ef
15 changed files with 624 additions and 281 deletions
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2
fs/cifs/Kconfig
View File

@ -2,6 +2,8 @@ config CIFS
tristate "CIFS support (advanced network filesystem, SMBFS successor)"
depends on INET
select NLS
select CRYPTO_MD5
select CRYPTO_ARC4
help
This is the client VFS module for the Common Internet File System
(CIFS) protocol which is the successor to the Server Message Block

6
fs/cifs/asn1.c
View File

@ -597,13 +597,13 @@ decode_negTokenInit(unsigned char *security_blob, int length,
if (compare_oid(oid, oidlen, MSKRB5_OID,
MSKRB5_OID_LEN))
server->sec_mskerberos = true;
else if (compare_oid(oid, oidlen, KRB5U2U_OID,
if (compare_oid(oid, oidlen, KRB5U2U_OID,
KRB5U2U_OID_LEN))
server->sec_kerberosu2u = true;
else if (compare_oid(oid, oidlen, KRB5_OID,
if (compare_oid(oid, oidlen, KRB5_OID,
KRB5_OID_LEN))
server->sec_kerberos = true;
else if (compare_oid(oid, oidlen, NTLMSSP_OID,
if (compare_oid(oid, oidlen, NTLMSSP_OID,
NTLMSSP_OID_LEN))
server->sec_ntlmssp = true;

18
fs/cifs/cifs_unicode.h
View File

@ -30,6 +30,8 @@
* This is a compressed table of upper and lower case conversion.
*
*/
#ifndef _CIFS_UNICODE_H
#define _CIFS_UNICODE_H
#include <asm/byteorder.h>
#include <linux/types.h>
@ -67,8 +69,8 @@ extern const struct UniCaseRange CifsUniUpperRange[];
#endif /* UNIUPR_NOUPPER */
#ifndef UNIUPR_NOLOWER
extern signed char UniLowerTable[512];
extern struct UniCaseRange UniLowerRange[];
extern signed char CifsUniLowerTable[512];
extern const struct UniCaseRange CifsUniLowerRange[];
#endif /* UNIUPR_NOLOWER */
#ifdef __KERNEL__
@ -337,15 +339,15 @@ UniStrupr(register wchar_t *upin)
* UniTolower: Convert a unicode character to lower case
*/
static inline wchar_t
UniTolower(wchar_t uc)
UniTolower(register wchar_t uc)
{
register struct UniCaseRange *rp;
register const struct UniCaseRange *rp;
if (uc < sizeof(UniLowerTable)) {
if (uc < sizeof(CifsUniLowerTable)) {
/* Latin characters */
return uc + UniLowerTable[uc]; /* Use base tables */
return uc + CifsUniLowerTable[uc]; /* Use base tables */
} else {
rp = UniLowerRange; /* Use range tables */
rp = CifsUniLowerRange; /* Use range tables */
while (rp->start) {
if (uc < rp->start) /* Before start of range */
return uc; /* Uppercase = input */
@ -374,3 +376,5 @@ UniStrlwr(register wchar_t *upin)
}
#endif
#endif /* _CIFS_UNICODE_H */

16
fs/cifs/cifs_uniupr.h
View File

@ -140,7 +140,7 @@ const struct UniCaseRange CifsUniUpperRange[] = {
/*
* Latin lower case
*/
static signed char CifsUniLowerTable[512] = {
signed char CifsUniLowerTable[512] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 000-00f */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 010-01f */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 020-02f */
@ -242,12 +242,12 @@ static signed char UniCaseRangeLff20[27] = {
/*
* Lower Case Range
*/
static const struct UniCaseRange CifsUniLowerRange[] = {
0x0380, 0x03ab, UniCaseRangeL0380,
0x0400, 0x042f, UniCaseRangeL0400,
0x0490, 0x04cb, UniCaseRangeL0490,
0x1e00, 0x1ff7, UniCaseRangeL1e00,
0xff20, 0xff3a, UniCaseRangeLff20,
0, 0, 0
const struct UniCaseRange CifsUniLowerRange[] = {
{0x0380, 0x03ab, UniCaseRangeL0380},
{0x0400, 0x042f, UniCaseRangeL0400},
{0x0490, 0x04cb, UniCaseRangeL0490},
{0x1e00, 0x1ff7, UniCaseRangeL1e00},
{0xff20, 0xff3a, UniCaseRangeLff20},
{0}
};
#endif

475
fs/cifs/cifsencrypt.c
View File

@ -27,6 +27,7 @@
#include "md5.h"
#include "cifs_unicode.h"
#include "cifsproto.h"
#include "ntlmssp.h"
#include <linux/ctype.h>
#include <linux/random.h>
@ -42,21 +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;
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);
if (!server->ntlmssp.sdescmd5) {
cERROR(1,
"cifs_calculate_signature: can't generate signature\n");
return -1;
}
cifs_MD5_final(signature, &context);
return 0;
rc = crypto_shash_init(&server->ntlmssp.sdescmd5->shash);
if (rc) {
cERROR(1, "cifs_calculate_signature: oould not init md5\n");
return rc;
}
if (server->secType == RawNTLMSSP)
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
server->session_key.data.ntlmv2.key,
CIFS_NTLMV2_SESSKEY_SIZE);
else
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
(char *)&server->session_key.data,
server->session_key.len);
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
cifs_pdu->Protocol, cifs_pdu->smb_buf_length);
rc = crypto_shash_final(&server->ntlmssp.sdescmd5->shash, signature);
return rc;
}
int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server,
__u32 *pexpected_response_sequence_number)
{
@ -78,8 +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
@ -89,21 +111,39 @@ 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;
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);
if (!server->ntlmssp.sdescmd5) {
cERROR(1, "cifs_calc_signature2: can't generate signature\n");
return -1;
}
rc = crypto_shash_init(&server->ntlmssp.sdescmd5->shash);
if (rc) {
cERROR(1, "cifs_calc_signature2: oould not init md5\n");
return rc;
}
if (server->secType == RawNTLMSSP)
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
server->session_key.data.ntlmv2.key,
CIFS_NTLMV2_SESSKEY_SIZE);
else
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
(char *)&server->session_key.data,
server->session_key.len);
for (i = 0; i < n_vec; i++) {
if (iov[i].iov_len == 0)
continue;
if (iov[i].iov_base == NULL) {
cERROR(1, "null iovec entry");
cERROR(1, "cifs_calc_signature2: null iovec entry");
return -EIO;
}
/* The first entry includes a length field (which does not get
@ -111,18 +151,18 @@ 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);
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
iov[i].iov_base + 4, iov[i].iov_len - 4);
} else
cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len);
crypto_shash_update(&server->ntlmssp.sdescmd5->shash,
iov[i].iov_base, iov[i].iov_len);
}
cifs_MD5_final(signature, &context);
rc = crypto_shash_final(&server->ntlmssp.sdescmd5->shash, signature);
return 0;
return rc;
}
int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server,
__u32 *pexpected_response_sequence_number)
{
@ -145,8 +185,7 @@ 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
@ -156,14 +195,14 @@ 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;
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)
@ -192,7 +231,7 @@ 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)
@ -209,7 +248,7 @@ 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];
@ -223,63 +262,6 @@ 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)
@ -324,38 +306,52 @@ 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;
wchar_t *server;
pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);
if (pctxt == NULL)
return -ENOMEM;
if (!ses->server->ntlmssp.sdeschmacmd5) {
cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
return -1;
}
/* 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);
crypto_shash_setkey(ses->server->ntlmssp.hmacmd5, nt_hash,
CIFS_NTHASH_SIZE);
rc = crypto_shash_init(&ses->server->ntlmssp.sdeschmacmd5->shash);
if (rc) {
cERROR(1, "calc_ntlmv2_hash: could not init hmacmd5\n");
return rc;
}
/* convert ses->userName to unicode and uppercase */
len = strlen(ses->userName);
user = kmalloc(2 + (len * 2), GFP_KERNEL);
if (user == NULL)
if (user == NULL) {
cERROR(1, "calc_ntlmv2_hash: user mem alloc failure\n");
rc = -ENOMEM;
goto calc_exit_2;
}
len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp);
UniStrupr(user);
hmac_md5_update((char *)user, 2*len, pctxt);
crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
(char *)user, 2 * len);
/* convert ses->domainName to unicode and uppercase */
if (ses->domainName) {
len = strlen(ses->domainName);
domain = kmalloc(2 + (len * 2), GFP_KERNEL);
if (domain == NULL)
if (domain == NULL) {
cERROR(1, "calc_ntlmv2_hash: domain mem alloc failure");
rc = -ENOMEM;
goto calc_exit_1;
}
len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len,
nls_cp);
/* the following line was removed since it didn't work well
@ -363,65 +359,292 @@ 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);
crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
(char *)domain, 2 * len);
kfree(domain);
} else if (ses->serverName) {
len = strlen(ses->serverName);
server = kmalloc(2 + (len * 2), GFP_KERNEL);
if (server == NULL) {
cERROR(1, "calc_ntlmv2_hash: server mem alloc failure");
rc = -ENOMEM;
goto calc_exit_1;
}
len = cifs_strtoUCS((__le16 *)server, ses->serverName, len,
nls_cp);
/* the following line was removed since it didn't work well
with lower cased domain name that passed as an option.
Maybe converting the domain name earlier makes sense */
/* UniStrupr(domain); */
crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
(char *)server, 2 * len);
kfree(server);
}
rc = crypto_shash_final(&ses->server->ntlmssp.sdeschmacmd5->shash,
ses->server->ntlmv2_hash);
calc_exit_1:
kfree(user);
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);
kfree(pctxt);
return rc;
}
void setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf,
const struct nls_table *nls_cp)
static int
find_domain_name(struct cifsSesInfo *ses)
{
int rc = 0;
unsigned int attrsize;
unsigned int type;
unsigned char *blobptr;
struct ntlmssp2_name *attrptr;
if (ses->server->tiblob) {
blobptr = ses->server->tiblob;
attrptr = (struct ntlmssp2_name *) blobptr;
while ((type = attrptr->type) != 0) {
blobptr += 2; /* advance attr type */
attrsize = attrptr->length;
blobptr += 2; /* advance attr size */
if (type == NTLMSSP_AV_NB_DOMAIN_NAME) {
if (!ses->domainName) {
ses->domainName =
kmalloc(attrptr->length + 1,
GFP_KERNEL);
if (!ses->domainName)
return -ENOMEM;
cifs_from_ucs2(ses->domainName,
(__le16 *)blobptr,
attrptr->length,
attrptr->length,
load_nls_default(), false);
}
}
blobptr += attrsize; /* advance attr value */
attrptr = (struct ntlmssp2_name *) blobptr;
}
} else {
ses->server->tilen = 2 * sizeof(struct ntlmssp2_name);
ses->server->tiblob = kmalloc(ses->server->tilen, GFP_KERNEL);
if (!ses->server->tiblob) {
ses->server->tilen = 0;
cERROR(1, "Challenge target info allocation failure");
return -ENOMEM;
}
memset(ses->server->tiblob, 0x0, ses->server->tilen);
attrptr = (struct ntlmssp2_name *) ses->server->tiblob;
attrptr->type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
}
return rc;
}
static int
CalcNTLMv2_response(const struct TCP_Server_Info *server,
char *v2_session_response)
{
int rc;
if (!server->ntlmssp.sdeschmacmd5) {
cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
return -1;
}
crypto_shash_setkey(server->ntlmssp.hmacmd5, server->ntlmv2_hash,
CIFS_HMAC_MD5_HASH_SIZE);
rc = crypto_shash_init(&server->ntlmssp.sdeschmacmd5->shash);
if (rc) {
cERROR(1, "CalcNTLMv2_response: could not init hmacmd5");
return rc;
}
memcpy(v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
server->cryptKey, CIFS_SERVER_CHALLENGE_SIZE);
crypto_shash_update(&server->ntlmssp.sdeschmacmd5->shash,
v2_session_response + CIFS_SERVER_CHALLENGE_SIZE,
sizeof(struct ntlmv2_resp) - CIFS_SERVER_CHALLENGE_SIZE);
if (server->tilen)
crypto_shash_update(&server->ntlmssp.sdeschmacmd5->shash,
server->tiblob, server->tilen);
rc = crypto_shash_final(&server->ntlmssp.sdeschmacmd5->shash,
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 ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf;
struct HMACMD5Context context;
buf->blob_signature = cpu_to_le32(0x00000101);
buf->reserved = 0;
buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
get_random_bytes(&buf->client_chal, sizeof(buf->client_chal));
buf->reserved2 = 0;
buf->names[0].type = cpu_to_le16(NTLMSSP_DOMAIN_TYPE);
buf->names[0].length = 0;
buf->names[1].type = 0;
buf->names[1].length = 0;
if (!ses->domainName) {
rc = find_domain_name(ses);
if (rc) {
cERROR(1, "could not get domain/server name rc %d", rc);
return rc;
}
}
/* calculate buf->ntlmv2_hash */
rc = calc_ntlmv2_hash(ses, nls_cp);
if (rc)
if (rc) {
cERROR(1, "could not get v2 hash rc %d", rc);
CalcNTLMv2_response(ses, resp_buf);
return rc;
}
rc = CalcNTLMv2_response(ses->server, resp_buf);
if (rc) {
cERROR(1, "could not get v2 hash rc %d", rc);
return rc;
}
/* 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);
if (!ses->server->ntlmssp.sdeschmacmd5) {
cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n");
return -1;
}
memcpy(&ses->server->mac_signing_key.data.ntlmv2.resp, resp_buf,
sizeof(struct ntlmv2_resp));
ses->server->mac_signing_key.len = 16 + sizeof(struct ntlmv2_resp);
crypto_shash_setkey(ses->server->ntlmssp.hmacmd5,
ses->server->ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE);
rc = crypto_shash_init(&ses->server->ntlmssp.sdeschmacmd5->shash);
if (rc) {
cERROR(1, "setup_ntlmv2_rsp: could not init hmacmd5\n");
return rc;
}
crypto_shash_update(&ses->server->ntlmssp.sdeschmacmd5->shash,
resp_buf, CIFS_HMAC_MD5_HASH_SIZE);
rc = crypto_shash_final(&ses->server->ntlmssp.sdeschmacmd5->shash,
ses->server->session_key.data.ntlmv2.key);
memcpy(&ses->server->session_key.data.ntlmv2.resp, resp_buf,
sizeof(struct ntlmv2_resp));
ses->server->session_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);
int rc;
unsigned char sec_key[CIFS_NTLMV2_SESSKEY_SIZE];
struct crypto_blkcipher *tfm_arc4;
struct scatterlist sgin, sgout;
struct blkcipher_desc desc;
hmac_md5_update(v2_session_response+8,
sizeof(struct ntlmv2_resp) - 8, &context);
get_random_bytes(sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
hmac_md5_final(v2_session_response, &context);
/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */
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->session_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->session_key.data.ntlmv2.key,
sec_key, CIFS_NTLMV2_SESSKEY_SIZE);
crypto_free_blkcipher(tfm_arc4);
return 0;
}
void
cifs_crypto_shash_release(struct TCP_Server_Info *server)
{
if (server->ntlmssp.md5)
crypto_free_shash(server->ntlmssp.md5);
if (server->ntlmssp.hmacmd5)
crypto_free_shash(server->ntlmssp.hmacmd5);
kfree(server->ntlmssp.sdeschmacmd5);
kfree(server->ntlmssp.sdescmd5);
}
int
cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
{
int rc;
unsigned int size;
server->ntlmssp.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0);
if (!server->ntlmssp.hmacmd5 ||
IS_ERR(server->ntlmssp.hmacmd5)) {
cERROR(1, "could not allocate crypto hmacmd5\n");
return 1;
}
server->ntlmssp.md5 = crypto_alloc_shash("md5", 0, 0);
if (!server->ntlmssp.md5 || IS_ERR(server->ntlmssp.md5)) {
cERROR(1, "could not allocate crypto md5\n");
rc = 1;
goto cifs_crypto_shash_allocate_ret1;
}
size = sizeof(struct shash_desc) +
crypto_shash_descsize(server->ntlmssp.hmacmd5);
server->ntlmssp.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
if (!server->ntlmssp.sdeschmacmd5) {
cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n");
rc = -ENOMEM;
goto cifs_crypto_shash_allocate_ret2;
}
server->ntlmssp.sdeschmacmd5->shash.tfm = server->ntlmssp.hmacmd5;
server->ntlmssp.sdeschmacmd5->shash.flags = 0x0;
size = sizeof(struct shash_desc) +
crypto_shash_descsize(server->ntlmssp.md5);
server->ntlmssp.sdescmd5 = kmalloc(size, GFP_KERNEL);
if (!server->ntlmssp.sdescmd5) {
cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n");
rc = -ENOMEM;
goto cifs_crypto_shash_allocate_ret3;
}
server->ntlmssp.sdescmd5->shash.tfm = server->ntlmssp.md5;
server->ntlmssp.sdescmd5->shash.flags = 0x0;
return 0;
cifs_crypto_shash_allocate_ret3:
kfree(server->ntlmssp.sdeschmacmd5);
cifs_crypto_shash_allocate_ret2:
crypto_free_shash(server->ntlmssp.md5);
cifs_crypto_shash_allocate_ret1:
crypto_free_shash(server->ntlmssp.hmacmd5);
return rc;
}

25
fs/cifs/cifsglob.h
View File

@ -25,6 +25,9 @@
#include <linux/workqueue.h>
#include "cifs_fs_sb.h"
#include "cifsacl.h"
#include <crypto/internal/hash.h>
#include <linux/scatterlist.h>
/*
* The sizes of various internal tables and strings
*/
@ -97,7 +100,7 @@ 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];
@ -120,6 +123,21 @@ struct cifs_cred {
struct cifs_ace *aces;
};
struct sdesc {
struct shash_desc shash;
char ctx[];
};
struct ntlmssp_auth {
__u32 client_flags;
__u32 server_flags;
unsigned char ciphertext[CIFS_CPHTXT_SIZE];
struct crypto_shash *hmacmd5;
struct crypto_shash *md5;
struct sdesc *sdeschmacmd5;
struct sdesc *sdescmd5;
};
/*
*****************************************************************
* Except the CIFS PDUs themselves all the
@ -182,11 +200,14 @@ 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 */
/* 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 */

7
fs/cifs/cifspdu.h
View File

@ -134,6 +134,12 @@
* Size of the session key (crypto key encrypted with the password
*/
#define CIFS_SESS_KEY_SIZE (24)
#define CIFS_CLIENT_CHALLENGE_SIZE (8)
#define CIFS_SERVER_CHALLENGE_SIZE (8)
#define CIFS_HMAC_MD5_HASH_SIZE (16)
#define CIFS_CPHTXT_SIZE (16)
#define CIFS_NTLMV2_SESSKEY_SIZE (16)
#define CIFS_NTHASH_SIZE (16)
/*
* Maximum user name length
@ -663,7 +669,6 @@ struct ntlmv2_resp {
__le64 time;
__u64 client_chal; /* random */
__u32 reserved2;
struct ntlmssp2_name names[2];
/* array of name entries could follow ending in minimum 4 byte struct */
} __attribute__((packed));

12
fs/cifs/cifsproto.h
View File

@ -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,
extern int cifs_calculate_session_key(struct session_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_shash_allocate(struct TCP_Server_Info *);
extern void cifs_crypto_shash_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);

13
fs/cifs/cifssmb.c
View File

@ -604,11 +604,14 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
else
rc = -EINVAL;
if (server->sec_kerberos || server->sec_mskerberos)
server->secType = Kerberos;
else if (server->sec_ntlmssp)
server->secType = RawNTLMSSP;
else
if (server->secType == Kerberos) {
if (!server->sec_kerberos &&
!server->sec_mskerberos)
rc = -EOPNOTSUPP;
} else if (server->secType == RawNTLMSSP) {
if (!server->sec_ntlmssp)
rc = -EOPNOTSUPP;
} else
rc = -EOPNOTSUPP;
}
} else

17
fs/cifs/connect.c
View File

@ -1673,7 +1673,9 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
MAX_USERNAME_SIZE))
continue;
if (strlen(vol->username) != 0 &&
strncmp(ses->password, vol->password,
ses->password != NULL &&
strncmp(ses->password,
vol->password ? vol->password : "",
MAX_PASSWORD_SIZE))
continue;
}
@ -1706,6 +1708,7 @@ cifs_put_smb_ses(struct cifsSesInfo *ses)
CIFSSMBLogoff(xid, ses);
_FreeXid(xid);
}
cifs_crypto_shash_release(server);
sesInfoFree(ses);
cifs_put_tcp_session(server);
}
@ -1785,13 +1788,23 @@ 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_shash_allocate(server);
if (rc) {
cERROR(1, "could not setup hash structures rc %d", rc);
goto get_ses_fail;
}
server->tilen = 0;
server->tiblob = NULL;
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_shash_release(ses->server);
goto get_ses_fail;
}
/* success, put it on the list */
write_lock(&cifs_tcp_ses_lock);

161
fs/cifs/dir.c
View File

@ -305,8 +305,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return rc;
goto cifs_create_out;
}
if (oplockEnabled)
@ -365,9 +364,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL) {
kfree(full_path);
FreeXid(xid);
return -ENOMEM;
rc = -ENOMEM;
goto cifs_create_out;
}
/*
@ -496,6 +494,11 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
struct cifsTconInfo *pTcon;
char *full_path = NULL;
struct inode *newinode = NULL;
int oplock = 0;
u16 fileHandle;
FILE_ALL_INFO *buf = NULL;
unsigned int bytes_written;
struct win_dev *pdev;
if (!old_valid_dev(device_number))
return -EINVAL;
@ -506,9 +509,12 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
pTcon = cifs_sb->tcon;
full_path = build_path_from_dentry(direntry);
if (full_path == NULL)
if (full_path == NULL) {
rc = -ENOMEM;
else if (pTcon->unix_ext) {
goto mknod_out;
}
if (pTcon->unix_ext) {
struct cifs_unix_set_info_args args = {
.mode = mode & ~current_umask(),
.ctime = NO_CHANGE_64,
@ -527,87 +533,78 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc)
goto mknod_out;
if (!rc) {
rc = cifs_get_inode_info_unix(&newinode, full_path,
rc = cifs_get_inode_info_unix(&newinode, full_path,
inode->i_sb, xid);
if (pTcon->nocase)
direntry->d_op = &cifs_ci_dentry_ops;
else
direntry->d_op = &cifs_dentry_ops;
if (rc == 0)
d_instantiate(direntry, newinode);
}
} else {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
int oplock = 0;
u16 fileHandle;
FILE_ALL_INFO *buf;
if (pTcon->nocase)
direntry->d_op = &cifs_ci_dentry_ops;
else
direntry->d_op = &cifs_dentry_ops;
cFYI(1, "sfu compat create special file");
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL) {
kfree(full_path);
rc = -ENOMEM;
FreeXid(xid);
return rc;
}
rc = CIFSSMBOpen(xid, pTcon, full_path,
FILE_CREATE, /* fail if exists */
GENERIC_WRITE /* BB would
WRITE_OWNER | WRITE_DAC be better? */,
/* Create a file and set the
file attribute to SYSTEM */
CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
&fileHandle, &oplock, buf,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
/* BB FIXME - add handling for backlevel servers
which need legacy open and check for all
calls to SMBOpen for fallback to SMBLeagcyOpen */
if (!rc) {
/* BB Do not bother to decode buf since no
local inode yet to put timestamps in,
but we can reuse it safely */
unsigned int bytes_written;
struct win_dev *pdev;
pdev = (struct win_dev *)buf;
if (S_ISCHR(mode)) {
memcpy(pdev->type, "IntxCHR", 8);
pdev->major =
cpu_to_le64(MAJOR(device_number));
pdev->minor =
cpu_to_le64(MINOR(device_number));
rc = CIFSSMBWrite(xid, pTcon,
fileHandle,
sizeof(struct win_dev),
0, &bytes_written, (char *)pdev,
NULL, 0);
} else if (S_ISBLK(mode)) {
memcpy(pdev->type, "IntxBLK", 8);
pdev->major =
cpu_to_le64(MAJOR(device_number));
pdev->minor =
cpu_to_le64(MINOR(device_number));
rc = CIFSSMBWrite(xid, pTcon,
fileHandle,
sizeof(struct win_dev),
0, &bytes_written, (char *)pdev,
NULL, 0);
} /* else if(S_ISFIFO */
CIFSSMBClose(xid, pTcon, fileHandle);
d_drop(direntry);
}
kfree(buf);
/* add code here to set EAs */
}
if (rc == 0)
d_instantiate(direntry, newinode);
goto mknod_out;
}
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
goto mknod_out;
cFYI(1, "sfu compat create special file");
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL) {
kfree(full_path);
rc = -ENOMEM;
FreeXid(xid);
return rc;
}
/* FIXME: would WRITE_OWNER | WRITE_DAC be better? */
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE,
GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
&fileHandle, &oplock, buf, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc)
goto mknod_out;
/* BB Do not bother to decode buf since no local inode yet to put
* timestamps in, but we can reuse it safely */
pdev = (struct win_dev *)buf;
if (S_ISCHR(mode)) {
memcpy(pdev->type, "IntxCHR", 8);
pdev->major =
cpu_to_le64(MAJOR(device_number));
pdev->minor =
cpu_to_le64(MINOR(device_number));
rc = CIFSSMBWrite(xid, pTcon,
fileHandle,
sizeof(struct win_dev),
0, &bytes_written, (char *)pdev,
NULL, 0);
} else if (S_ISBLK(mode)) {
memcpy(pdev->type, "IntxBLK", 8);
pdev->major =
cpu_to_le64(MAJOR(device_number));
pdev->minor =
cpu_to_le64(MINOR(device_number));
rc = CIFSSMBWrite(xid, pTcon,
fileHandle,
sizeof(struct win_dev),
0, &bytes_written, (char *)pdev,
NULL, 0);
} /* else if (S_ISFIFO) */
CIFSSMBClose(xid, pTcon, fileHandle);
d_drop(direntry);
/* FIXME: add code here to set EAs */
mknod_out:
kfree(full_path);
kfree(buf);
FreeXid(xid);
return rc;
}

3
fs/cifs/file.c
View File

@ -242,8 +242,7 @@ int cifs_open(struct inode *inode, struct file *file)
full_path = build_path_from_dentry(file->f_path.dentry);
if (full_path == NULL) {
rc = -ENOMEM;
FreeXid(xid);
return rc;
goto out;
}
cFYI(1, "inode = 0x%p file flags are 0x%x for %s",

13
fs/cifs/ntlmssp.h
View File

@ -61,6 +61,19 @@
#define NTLMSSP_NEGOTIATE_KEY_XCH 0x40000000
#define NTLMSSP_NEGOTIATE_56 0x80000000
/* Define AV Pair Field IDs */
#define NTLMSSP_AV_EOL 0
#define NTLMSSP_AV_NB_COMPUTER_NAME 1
#define NTLMSSP_AV_NB_DOMAIN_NAME 2
#define NTLMSSP_AV_DNS_COMPUTER_NAME 3
#define NTLMSSP_AV_DNS_DOMAIN_NAME 4
#define NTLMSSP_AV_DNS_TREE_NAME 5
#define NTLMSSP_AV_FLAGS 6
#define NTLMSSP_AV_TIMESTAMP 7
#define NTLMSSP_AV_RESTRICTION 8
#define NTLMSSP_AV_TARGET_NAME 9
#define NTLMSSP_AV_CHANNEL_BINDINGS 10
/* Although typedefs are not commonly used for structure definitions */
/* in the Linux kernel, in this particular case they are useful */
/* to more closely match the standards document for NTLMSSP from */

131
fs/cifs/sess.c
View File

@ -383,6 +383,9 @@ static int decode_ascii_ssetup(char **pbcc_area, int bleft,
static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
struct cifsSesInfo *ses)
{
unsigned int tioffset; /* challeng message target info area */
unsigned int tilen; /* challeng message target info area length */
CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
@ -405,6 +408,20 @@ static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
/* BB spec says that if AvId field of MsvAvTimestamp is populated then
we must set the MIC field of the AUTHENTICATE_MESSAGE */
ses->server->ntlmssp.server_flags = le32_to_cpu(pblob->NegotiateFlags);
tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset);
tilen = cpu_to_le16(pblob->TargetInfoArray.Length);
ses->server->tilen = tilen;
if (tilen) {
ses->server->tiblob = kmalloc(tilen, GFP_KERNEL);
if (!ses->server->tiblob) {
cERROR(1, "Challenge target info allocation failure");
return -ENOMEM;
}
memcpy(ses->server->tiblob, bcc_ptr + tioffset, tilen);
}
return 0;
}
@ -425,12 +442,13 @@ static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
/* BB is NTLMV2 session security format easier to use here? */
flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
NTLMSSP_NEGOTIATE_NTLM;
if (ses->server->secMode &
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
flags |= NTLMSSP_NEGOTIATE_SIGN;
if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
flags |= NTLMSSP_NEGOTIATE_SIGN |
NTLMSSP_NEGOTIATE_KEY_XCH |
NTLMSSP_NEGOTIATE_EXTENDED_SEC;
}
sec_blob->NegotiateFlags |= cpu_to_le32(flags);
@ -451,10 +469,12 @@ 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;
unsigned char *tmp;
char ntlm_session_key[CIFS_SESS_KEY_SIZE];
struct ntlmv2_resp ntlmv2_response = {};
memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
sec_blob->MessageType = NtLmAuthenticate;
@ -477,19 +497,25 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
sec_blob->LmChallengeResponse.Length = 0;
sec_blob->LmChallengeResponse.MaximumLength = 0;
/* 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,
ntlm_session_key, ses->password);
memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE);
sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE);
sec_blob->NtChallengeResponse.MaximumLength =
cpu_to_le16(CIFS_SESS_KEY_SIZE);
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);
tmp += ses->server->tilen;
} else
ses->server->tilen = 0;
tmp += CIFS_SESS_KEY_SIZE;
sec_blob->NtChallengeResponse.Length = cpu_to_le16(size +
ses->server->tilen);
sec_blob->NtChallengeResponse.MaximumLength =
cpu_to_le16(size + ses->server->tilen);
if (ses->domainName == NULL) {
sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
@ -501,7 +527,6 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
MAX_USERNAME_SIZE, nls_cp);
len *= 2; /* unicode is 2 bytes each */
len += 2; /* trailing null */
sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->DomainName.Length = cpu_to_le16(len);
sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
@ -518,7 +543,6 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
MAX_USERNAME_SIZE, nls_cp);
len *= 2; /* unicode is 2 bytes each */
len += 2; /* trailing null */
sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
sec_blob->UserName.Length = cpu_to_le16(len);
sec_blob->UserName.MaximumLength = cpu_to_le16(len);
@ -530,9 +554,26 @@ 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;
}
@ -546,15 +587,14 @@ static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
return;
}
static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB,
static int setup_ntlmssp_auth_req(char *ntlmsspblob,
struct cifsSesInfo *ses,
const struct nls_table *nls, bool first_time)
{
int bloblen;
bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls,
bloblen = build_ntlmssp_auth_blob(ntlmsspblob, ses, nls,
first_time);
pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen);
return bloblen;
}
@ -580,6 +620,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
struct key *spnego_key = NULL;
__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
bool first_time;
char *ntlmsspblob;
if (ses == NULL)
return -EINVAL;
@ -690,7 +731,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
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 */
@ -729,12 +770,21 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
cpu_to_le16(sizeof(struct ntlmv2_resp));
/* calculate session key */
setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
rc = setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
if (rc) {
kfree(v2_sess_key);
goto ssetup_exit;
}
/* FIXME: calculate MAC key */
memcpy(bcc_ptr, (char *)v2_sess_key,
sizeof(struct ntlmv2_resp));
bcc_ptr += sizeof(struct ntlmv2_resp);
kfree(v2_sess_key);
if (ses->server->tilen > 0) {
memcpy(bcc_ptr, ses->server->tiblob,
ses->server->tilen);
bcc_ptr += ses->server->tilen;
}
if (ses->capabilities & CAP_UNICODE) {
if (iov[0].iov_len % 2) {
*bcc_ptr = 0;
@ -765,15 +815,15 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
}
/* 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;
@ -815,12 +865,26 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
if (phase == NtLmNegotiate) {
setup_ntlmssp_neg_req(pSMB, ses);
iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
iov[1].iov_base = &pSMB->req.SecurityBlob[0];
} else if (phase == NtLmAuthenticate) {
int blob_len;
blob_len = setup_ntlmssp_auth_req(pSMB, ses,
nls_cp,
first_time);
ntlmsspblob = kmalloc(5 *
sizeof(struct _AUTHENTICATE_MESSAGE),
GFP_KERNEL);
if (!ntlmsspblob) {
cERROR(1, "Can't allocate NTLMSSP");
rc = -ENOMEM;
goto ssetup_exit;
}
blob_len = setup_ntlmssp_auth_req(ntlmsspblob,
ses,
nls_cp,
first_time);
iov[1].iov_len = blob_len;
iov[1].iov_base = ntlmsspblob;
pSMB->req.SecurityBlobLength =
cpu_to_le16(blob_len);
/* Make sure that we tell the server that we
are using the uid that it just gave us back
on the response (challenge) */
@ -830,7 +894,6 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
rc = -ENOSYS;
goto ssetup_exit;
}
iov[1].iov_base = &pSMB->req.SecurityBlob[0];
/* unicode strings must be word aligned */
if ((iov[0].iov_len + iov[1].iov_len) % 2) {
*bcc_ptr = 0;

6
fs/cifs/transport.c
View File

@ -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");