diff options
| -rw-r--r-- | fs/cifs/cifs_spnego.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c index ad54a3a6e434..d79eee41e9c5 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); |