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cifs: have calc_lanman_hash take more granular args

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cifs: have calc_lanman_hash take more granular args

We need to use this routine to encrypt passwords associated with the
tcon too. Don't assume that the password will be attached to the
smb_session.

Also, make some of the values in the lower encryption functions
const since they aren't changed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2008-12-05 20:41:21 -05:00 committed by Steve French
parent 55162dec93
commit 4e53a3fb98
7 changed files with 33 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
fs/cifs/cifsencrypt.c
View file

@ -37,7 +37,7 @@
extern void mdfour(unsigned char *out, unsigned char *in, int n);
extern void E_md4hash(const unsigned char *passwd, unsigned char *p16);
extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
unsigned char *p24);
static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu,
@ -280,25 +280,22 @@ int CalcNTLMv2_partial_mac_key(struct cifsSesInfo *ses,
}
#ifdef CONFIG_CIFS_WEAK_PW_HASH
void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key)
void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
char *lnm_session_key)
{
int i;
char password_with_pad[CIFS_ENCPWD_SIZE];
if (ses->server == NULL)
return;
memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
if (ses->password)
strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
if (password)
strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
if ((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0)
if (extended_security & CIFSSEC_MAY_PLNTXT) {
memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
memcpy(lnm_session_key, password_with_pad,
CIFS_ENCPWD_SIZE);
return;
}
if (!encrypt && extended_security & CIFSSEC_MAY_PLNTXT) {
memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
memcpy(lnm_session_key, password_with_pad,
CIFS_ENCPWD_SIZE);
return;
}
/* calculate old style session key */
/* calling toupper is less broken than repeatedly
@ -314,7 +311,8 @@ void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key)
for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
password_with_pad[i] = toupper(password_with_pad[i]);
SMBencrypt(password_with_pad, ses->server->cryptKey, lnm_session_key);
SMBencrypt(password_with_pad, cryptkey, lnm_session_key);
/* clear password before we return/free memory */
memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
}

3
fs/cifs/cifsencrypt.h
View file

@ -26,7 +26,8 @@
extern void mdfour(unsigned char *out, unsigned char *in, int n);
/* smbdes.c */
extern void E_P16(unsigned char *p14, unsigned char *p16);
extern void E_P24(unsigned char *p21, unsigned char *c8, unsigned char *p24);
extern void E_P24(unsigned char *p21, const unsigned char *c8,
unsigned char *p24);

3
fs/cifs/cifsproto.h
View file

@ -330,7 +330,8 @@ extern void CalcNTLMv2_response(const struct cifsSesInfo *, char *);
extern void setup_ntlmv2_rsp(struct cifsSesInfo *, char *,
const struct nls_table *);
#ifdef CONFIG_CIFS_WEAK_PW_HASH
extern void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key);
extern void calc_lanman_hash(const char *password, const char *cryptkey,
bool encrypt, char *lnm_session_key);
#endif /* CIFS_WEAK_PW_HASH */
extern int CIFSSMBCopy(int xid,
struct cifsTconInfo *source_tcon,

5
fs/cifs/connect.c
View file

@ -3533,7 +3533,10 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
#ifdef CONFIG_CIFS_WEAK_PW_HASH
if ((extended_security & CIFSSEC_MAY_LANMAN) &&
(ses->server->secType == LANMAN))
calc_lanman_hash(ses, bcc_ptr);
calc_lanman_hash(ses->password, ses->server->cryptKey,
ses->server->secMode &
SECMODE_PW_ENCRYPT ? true : false,
bcc_ptr);
else
#endif /* CIFS_WEAK_PW_HASH */
SMBNTencrypt(ses->password,

5
fs/cifs/sess.c
View file

@ -417,7 +417,10 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
/* BB calculate hash with password */
/* and copy into bcc */
calc_lanman_hash(ses, lnm_session_key);
calc_lanman_hash(ses->password, ses->server->cryptKey,
ses->server->secMode & SECMODE_PW_ENCRYPT ?
true : false, lnm_session_key);
ses->flags |= CIFS_SES_LANMAN;
memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
bcc_ptr += CIFS_SESS_KEY_SIZE;

5
fs/cifs/smbdes.c
View file

@ -318,7 +318,8 @@ str_to_key(unsigned char *str, unsigned char *key)
}
static void
smbhash(unsigned char *out, unsigned char *in, unsigned char *key, int forw)
smbhash(unsigned char *out, const unsigned char *in, unsigned char *key,
int forw)
{
int i;
char *outb; /* outb[64] */
@ -363,7 +364,7 @@ E_P16(unsigned char *p14, unsigned char *p16)
}
void
E_P24(unsigned char *p21, unsigned char *c8, unsigned char *p24)
E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24)
{
smbhash(p24, c8, p21, 1);
smbhash(p24 + 8, c8, p21 + 7, 1);

9
fs/cifs/smbencrypt.c
View file

@ -49,9 +49,10 @@
/*The following definitions come from libsmb/smbencrypt.c */
void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
void SMBencrypt(unsigned char *passwd, const unsigned char *c8,
unsigned char *p24);
void E_md4hash(const unsigned char *passwd, unsigned char *p16);
static void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
static void SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8,
unsigned char p24[24]);
void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
@ -61,7 +62,7 @@ void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
encrypted password into p24 */
/* Note that password must be uppercased and null terminated */
void
SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
{
unsigned char p14[15], p21[21];
@ -212,7 +213,7 @@ ntv2_owf_gen(const unsigned char owf[16], const char *user_n,
/* Does the des encryption from the NT or LM MD4 hash. */
static void
SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8,
unsigned char p24[24])
{
unsigned char p21[21];