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authorSteve French <sfrench@us.ibm.com>2007-11-16 18:32:52 +0000
committerSteve French <sfrench@us.ibm.com>2007-11-16 18:32:52 +0000
commit68bf728a225b7f2045bb501854d6e7695b9b015d (patch)
tree0ee540a84c48e488e67ae6cc41dd3f9af61b9016 /fs/cifs
parent133672efbc1085f9af990bdc145e1822ea93bcf3 (diff)
downloadvexpress-lsk-68bf728a225b7f2045bb501854d6e7695b9b015d.tar.gz
[CIFS] add ver= prefix to upcall format version
Acked-by: Jeff Layton <jlayton@redhat.com> Acked-by: Igor Mammedov <niallan@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifs_spnego.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index ad54a3a6e43..d79eee41e9c 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -66,6 +66,11 @@ struct key_type cifs_spnego_key_type = {
.describe = user_describe,
};
+#define MAX_VER_STR_LEN 9 /* 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 */
/* get a key struct with a SPNEGO security blob, suitable for session setup */
struct key *
cifs_get_spnego_key(struct cifsSesInfo *sesInfo, const char *hostname)
@@ -75,11 +80,11 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo, const char *hostname)
size_t desc_len;
struct key *spnego_key;
-
- /* version + ;ip{4|6}= + address + ;host=hostname +
- ;sec= + ;uid= + NULL */
- desc_len = 4 + 5 + 32 + 1 + 5 + strlen(hostname) +
- strlen(";sec=krb5") + 7 + sizeof(uid_t)*2 + 1;
+ /* BB: come up with better scheme for determining length */
+ /* length of fields (with semicolons): ver=0xyz ipv4= ipaddress host=
+ hostname sec=mechanism uid=0x uid */
+ desc_len = MAX_VER_STR_LEN + 5 + MAX_IPV6_ADDR_LEN + 1 + 6 +
+ strlen(hostname) + MAX_MECH_STR_LEN + 8 + (sizeof(uid_t) * 2);
spnego_key = ERR_PTR(-ENOMEM);
description = kzalloc(desc_len, GFP_KERNEL);
if (description == NULL)
@@ -88,7 +93,7 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo, const char *hostname)
dp = description;
/* start with version and hostname portion of UNC string */
spnego_key = ERR_PTR(-EINVAL);
- sprintf(dp, "0x%2.2x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
+ sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
hostname);
dp = description + strlen(description);