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: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index bd5f13d..d4839cf 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -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 @@
}
#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 @@
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);
}