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[CIFS] add constants for string lengths of keynames in SPNEGO upcall string 

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2008-09-23 17:23:09 +00:00
parent a12a1ac7a4
commit 7c9c3760b3
1 changed files with 26 additions and 9 deletions
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35
fs/cifs/cifs_spnego.c
View File

@ -66,11 +66,28 @@ struct key_type cifs_spnego_key_type = {
.describe = user_describe,
};
#define MAX_VER_STR_LEN 8 /* length of longest version string e.g.
strlen("ver=0xFF") */
#define MAX_MECH_STR_LEN 13 /* length of longest security mechanism name, eg
in future could have strlen(";sec=ntlmsspi") */
#define MAX_IPV6_ADDR_LEN 42 /* eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/60 */
/* length of longest version string e.g. strlen("ver=0xFF") */
#define MAX_VER_STR_LEN 8
/* length of longest security mechanism name, eg in future could have
* strlen(";sec=ntlmsspi") */
#define MAX_MECH_STR_LEN 13
/* max possible addr len eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/60 */
#define MAX_IPV6_ADDR_LEN 42
/* strlen of "host=" */
#define HOST_KEY_LEN 5
/* strlen of ";ip4=" or ";ip6=" */
#define IP_KEY_LEN 5
/* strlen of ";uid=0x" */
#define UID_KEY_LEN 7
/* strlen of ";user=" */
#define USER_KEY_LEN 6
/* get a key struct with a SPNEGO security blob, suitable for session setup */
struct key *
cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
@ -84,11 +101,11 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
/* length of fields (with semicolons): ver=0xyz ip4=ipaddress
host=hostname sec=mechanism uid=0xFF user=username */
desc_len = MAX_VER_STR_LEN +
6 /* len of "host=" */ + strlen(hostname) +
5 /* len of ";ipv4=" */ + MAX_IPV6_ADDR_LEN +
HOST_KEY_LEN + strlen(hostname) +
IP_KEY_LEN + MAX_IPV6_ADDR_LEN +
MAX_MECH_STR_LEN +
7 /* len of ";uid=0x" */ + (sizeof(uid_t) * 2) +
6 /* len of ";user=" */ + strlen(sesInfo->userName) + 1;
UID_KEY_LEN + (sizeof(uid_t) * 2) +
USER_KEY_LEN + strlen(sesInfo->userName) + 1;
spnego_key = ERR_PTR(-ENOMEM);
description = kzalloc(desc_len, GFP_KERNEL);