diff options
Diffstat (limited to 'net/sunrpc/auth_gss/auth_gss.c')
| -rw-r--r-- | net/sunrpc/auth_gss/auth_gss.c | 48 |
1 files changed, 40 insertions, 8 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index 0fc397fae42b..21c0aa0a0d1d 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -284,7 +284,12 @@ err: return p; } -#define UPCALL_BUF_LEN 128 +/* XXX: Need some documentation about why UPCALL_BUF_LEN is so small. + * Is user space expecting no more than UPCALL_BUF_LEN bytes? + * Note that there are now _two_ NI_MAXHOST sized data items + * being passed in this string. + */ +#define UPCALL_BUF_LEN 256 struct gss_upcall_msg { refcount_t count; @@ -456,18 +461,44 @@ static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, buflen -= len; p += len; gss_msg->msg.len = len; + + /* + * target= is a full service principal that names the remote + * identity that we are authenticating to. + */ if (target_name) { len = scnprintf(p, buflen, "target=%s ", target_name); buflen -= len; p += len; gss_msg->msg.len += len; } - if (service_name != NULL) { - len = scnprintf(p, buflen, "service=%s ", service_name); + + /* + * gssd uses service= and srchost= to select a matching key from + * the system's keytab to use as the source principal. + * + * service= is the service name part of the source principal, + * or "*" (meaning choose any). + * + * srchost= is the hostname part of the source principal. When + * not provided, gssd uses the local hostname. + */ + if (service_name) { + char *c = strchr(service_name, '@'); + + if (!c) + len = scnprintf(p, buflen, "service=%s ", + service_name); + else + len = scnprintf(p, buflen, + "service=%.*s srchost=%s ", + (int)(c - service_name), + service_name, c + 1); buflen -= len; p += len; gss_msg->msg.len += len; } + if (mech->gm_upcall_enctypes) { len = scnprintf(p, buflen, "enctypes=%s ", mech->gm_upcall_enctypes); @@ -985,7 +1016,7 @@ static void gss_pipe_free(struct gss_pipe *p) * parameters based on the input flavor (which must be a pseudoflavor) */ static struct gss_auth * -gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) +gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) { rpc_authflavor_t flavor = args->pseudoflavor; struct gss_auth *gss_auth; @@ -1132,7 +1163,7 @@ gss_destroy(struct rpc_auth *auth) * (which is guaranteed to last as long as any of its descendants). */ static struct gss_auth * -gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, +gss_auth_find_or_add_hashed(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt, struct gss_auth *new) { @@ -1169,7 +1200,8 @@ out: } static struct gss_auth * -gss_create_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) +gss_create_hashed(const struct rpc_auth_create_args *args, + struct rpc_clnt *clnt) { struct gss_auth *gss_auth; struct gss_auth *new; @@ -1188,7 +1220,7 @@ out: } static struct rpc_auth * -gss_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) +gss_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) { struct gss_auth *gss_auth; struct rpc_xprt_switch *xps = rcu_access_pointer(clnt->cl_xpi.xpi_xpswitch); @@ -1571,7 +1603,7 @@ static int gss_cred_is_negative_entry(struct rpc_cred *cred) if (test_bit(RPCAUTH_CRED_NEGATIVE, &cred->cr_flags)) { unsigned long now = jiffies; unsigned long begin, expire; - struct gss_cred *gss_cred; + struct gss_cred *gss_cred; gss_cred = container_of(cred, struct gss_cred, gc_base); begin = gss_cred->gc_upcall_timestamp; |