tests: Add ssh server setup functionality

Add the ability to generate a keypair (RSA, but tests that focus on
what occurs over a connection may well not care) and an ssh_bind
easily.

Signed-off-by: Alan Dunn <amdunn@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/torture.h

@@ -35,6 +35,7 @@
 #include <setjmp.h>
 
 #include "libssh/priv.h"
+#include "libssh/server.h"
 #include "libssh/sftp.h"
 
 #include <cmocka.h>
@@ -66,6 +67,10 @@ ssh_session torture_ssh_session(const char *host,
                                 const char *user,
                                 const char *password);
 
+ssh_bind torture_ssh_bind(const char *addr,
+                          const unsigned int port,
+                          const char *private_key_file);
+
 struct torture_sftp *torture_sftp_session(ssh_session session);
 void torture_sftp_close(struct torture_sftp *t);