struct key *
cifs_get_spnego_key(struct cifs_ses *sesInfo)
{
struct TCP_Server_Info *server = sesInfo->server;
struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
char *description, *dp;
size_t desc_len;
struct key *spnego_key;
const char *hostname = server->hostname;
desc_len = MAX_VER_STR_LEN +
HOST_KEY_LEN + strlen(hostname) +
IP_KEY_LEN + INET6_ADDRSTRLEN +
MAX_MECH_STR_LEN +
UID_KEY_LEN + (sizeof(uid_t) * 2) +
CREDUID_KEY_LEN + (sizeof(uid_t) * 2) +
PID_KEY_LEN + (sizeof(pid_t) * 2) + 1;
if (sesInfo->user_name)
desc_len += USER_KEY_LEN + strlen(sesInfo->user_name);
spnego_key = ERR_PTR(-ENOMEM);
description = kzalloc(desc_len, GFP_KERNEL);
if (description == NULL)
goto out;
dp = description;
spnego_key = ERR_PTR(-EINVAL);
sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
hostname);
dp = description + strlen(description);
if (server->dstaddr.ss_family == AF_INET)
sprintf(dp, "ip4=%pI4", &sa->sin_addr);
else if (server->dstaddr.ss_family == AF_INET6)
sprintf(dp, "ip6=%pI6", &sa6->sin6_addr);
else
goto out;
dp = description + strlen(description);
if (server->sec_kerberos)
sprintf(dp, ";sec=krb5");
else if (server->sec_mskerberos)
sprintf(dp, ";sec=mskrb5");
else
goto out;
dp = description + strlen(description);
sprintf(dp, ";uid=0x%x", sesInfo->linux_uid);
dp = description + strlen(description);
sprintf(dp, ";creduid=0x%x", sesInfo->cred_uid);
if (sesInfo->user_name) {
dp = description + strlen(description);
sprintf(dp, ";user=%s", sesInfo->user_name);
}
dp = description + strlen(description);
sprintf(dp, ";pid=0x%x", current->pid);
cFYI(1, "key description = %s", description);
spnego_key = request_key(&cifs_spnego_key_type, description, "");
#ifdef CONFIG_CIFS_DEBUG2
if (cifsFYI && !IS_ERR(spnego_key)) {
struct cifs_spnego_msg *msg = spnego_key->payload.data;
cifs_dump_mem("SPNEGO reply blob:", msg->data, min(1024U,
msg->secblob_len + msg->sesskey_len));
}
#endif
out:
kfree(description);
return spnego_key;
}
/* get a key struct with a SPNEGO security blob, suitable for session setup */
struct key *
cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
{
struct TCP_Server_Info *server = sesInfo->server;
char *description, *dp;
size_t desc_len;
struct key *spnego_key;
const char *hostname = server->hostname;
/* length of fields (with semicolons): ver=0xyz ip4=ipaddress
host=hostname sec=mechanism uid=0xFF user=username */
desc_len = MAX_VER_STR_LEN +
HOST_KEY_LEN + strlen(hostname) +
IP_KEY_LEN + INET6_ADDRSTRLEN +
MAX_MECH_STR_LEN +
UID_KEY_LEN + (sizeof(uid_t) * 2) +
USER_KEY_LEN + strlen(sesInfo->userName) +
PID_KEY_LEN + (sizeof(pid_t) * 2) + 1;
spnego_key = ERR_PTR(-ENOMEM);
description = kzalloc(desc_len, GFP_KERNEL);
if (description == NULL)
goto out;
dp = description;
/* start with version and hostname portion of UNC string */
spnego_key = ERR_PTR(-EINVAL);
sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
hostname);
dp = description + strlen(description);
/* add the server address */
if (server->addr.sockAddr.sin_family == AF_INET)
sprintf(dp, "ip4=%pI4", &server->addr.sockAddr.sin_addr);
else if (server->addr.sockAddr.sin_family == AF_INET6)
sprintf(dp, "ip6=%pI6", &server->addr.sockAddr6.sin6_addr);
else
goto out;
dp = description + strlen(description);
/* for now, only sec=krb5 and sec=mskrb5 are valid */
if (server->sec_kerberos)
sprintf(dp, ";sec=krb5");
else if (server->sec_mskerberos)
sprintf(dp, ";sec=mskrb5");
else
goto out;
dp = description + strlen(description);
sprintf(dp, ";uid=0x%x", sesInfo->linux_uid);
dp = description + strlen(description);
sprintf(dp, ";user=%s", sesInfo->userName);
dp = description + strlen(description);
sprintf(dp, ";pid=0x%x", current->pid);
cFYI(1, "key description = %s", description);
spnego_key = request_key(&cifs_spnego_key_type, description, "");
#ifdef CONFIG_CIFS_DEBUG2
if (cifsFYI && !IS_ERR(spnego_key)) {
struct cifs_spnego_msg *msg = spnego_key->payload.data;
cifs_dump_mem("SPNEGO reply blob:", msg->data, min(1024U,
msg->secblob_len + msg->sesskey_len));
}
#endif /* CONFIG_CIFS_DEBUG2 */
out:
kfree(description);
return spnego_key;
}
/* get a key struct with a SPNEGO security blob, suitable for session setup */
struct key *
cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
{
struct TCP_Server_Info *server = sesInfo->server;
char *description, *dp;
size_t desc_len;
struct key *spnego_key;
const char *hostname = server->hostname;
/* 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)
goto out;
dp = description;
/* start with version and hostname portion of UNC string */
spnego_key = ERR_PTR(-EINVAL);
sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
hostname);
dp = description + strlen(description);
/* add the server address */
if (server->addr.sockAddr.sin_family == AF_INET)
sprintf(dp, "ip4=" NIPQUAD_FMT,
NIPQUAD(server->addr.sockAddr.sin_addr));
else if (server->addr.sockAddr.sin_family == AF_INET6)
sprintf(dp, "ip6=" NIP6_SEQFMT,
NIP6(server->addr.sockAddr6.sin6_addr));
else
goto out;
dp = description + strlen(description);
/* for now, only sec=krb5 is valid */
if (server->secType == Kerberos)
sprintf(dp, ";sec=krb5");
else
goto out;
dp = description + strlen(description);
sprintf(dp, ";uid=0x%x", sesInfo->linux_uid);
cFYI(1, ("key description = %s", description));
spnego_key = request_key(&cifs_spnego_key_type, description, "");
#ifdef CONFIG_CIFS_DEBUG2
if (cifsFYI && !IS_ERR(spnego_key)) {
struct cifs_spnego_msg *msg = spnego_key->payload.data;
cifs_dump_mem("SPNEGO reply blob:", msg->data, min(1024U,
msg->secblob_len + msg->sesskey_len));
}
#endif /* CONFIG_CIFS_DEBUG2 */
out:
kfree(description);
return spnego_key;
}
