New file, krb5_info, indicates which Kerberos encryption types are
supported by the kernel rpcsec_gss code. This is used by gssd to
determine which encryption types it should attempt to negotiate
when creating a context with a server.
The server principal's database and keytab encryption types are
what limits what it should negotiate. Therefore, its keytab
should be created with only the enctypes listed by this file.
ATTENTION: This is a TEMPORARY solution and will not be committed
upstream. The final solution will be to add the enctype
information to the upcall.
From: J. Bruce Fields <[email protected]>
Signed-off-by: Kevin Coffman <[email protected]>
---
net/sunrpc/rpc_pipe.c | 31 +++++++++++++++++++++++++++++++
1 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 5a9b0e7..5f159a0 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -385,6 +385,31 @@ static const struct file_operations rpc_info_operations = {
.release = rpc_info_release,
};
+/*
+ * This really belongs in the gss_krb5 code,
+ * but the info file logically belongs here
+ */
+static int
+rpc_show_krb5_info(struct seq_file *m, void *v)
+{
+ seq_printf(m, "enctypes: 3,1,2\n");
+ return 0;
+}
+
+static int
+rpc_krb5_info_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rpc_show_krb5_info, NULL);
+}
+
+static struct file_operations krb5_info_operations = {
+ .owner = THIS_MODULE,
+ .open = rpc_krb5_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/*
* We have a single directory with 1 node in it.
@@ -396,6 +421,7 @@ enum {
RPCAUTH_nfs,
RPCAUTH_portmap,
RPCAUTH_statd,
+ RPCAUTH_krb5_info,
RPCAUTH_RootEOF
};
@@ -429,6 +455,11 @@ static struct rpc_filelist files[] = {
.name = "statd",
.mode = S_IFDIR | S_IRUGO | S_IXUGO,
},
+ [RPCAUTH_krb5_info] = {
+ .name = "krb5_info",
+ .i_fop = &krb5_info_operations,
+ .mode = S_IFREG | S_IRUSR,
+ },
};
enum {