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Commit 4e53a3fb authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

cifs: have calc_lanman_hash take more granular args 



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: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent 55162dec

fs/cifs/cifsencrypt.c

+14 −16
Original line number Diff line number Diff line
@@ -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,
@@ -280,20 +280,17 @@ 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) {

	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);
@@ -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);

}

fs/cifs/cifsencrypt.h

+2 −1
Original line number Diff line number Diff line
@@ -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);

fs/cifs/cifsproto.h

+2 −1
Original line number Diff line number Diff line
@@ -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,

fs/cifs/connect.c

+4 −1
Original line number Diff line number Diff line
@@ -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,

fs/cifs/sess.c

+4 −1
Original line number Diff line number Diff line
@@ -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;