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authorRonnie Sahlberg <lsahlber@redhat.com>2020-04-12 16:09:26 +1000
committerSteve French <stfrench@microsoft.com>2020-04-15 21:15:03 -0500
commitf560cda91bd59a872fe0e3217b74c3f33c131b50 (patch)
tree7bdca5ec954703cc16b043b4383f478542257147 /fs/cifs
parent8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff)
cifs: dump the session id and keys also for SMB2 sessions
We already dump these keys for SMB3, lets also dump it for SMB2 sessions so that we can use the session key in wireshark to check and validate that the signatures are correct. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/smb2pdu.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 47d3e382ecaa..b30aa3cdd845 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1552,6 +1552,21 @@ SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
}
rc = SMB2_sess_establish_session(sess_data);
+#ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
+ if (ses->server->dialect < SMB30_PROT_ID) {
+ cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__);
+ /*
+ * The session id is opaque in terms of endianness, so we can't
+ * print it as a long long. we dump it as we got it on the wire
+ */
+ cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid),
+ &ses->Suid);
+ cifs_dbg(VFS, "Session Key %*ph\n",
+ SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response);
+ cifs_dbg(VFS, "Signing Key %*ph\n",
+ SMB3_SIGN_KEY_SIZE, ses->auth_key.response);
+ }
+#endif
out:
kfree(ntlmssp_blob);
SMB2_sess_free_buffer(sess_data);