libtpmtss: Initialize library from all users

Previously, only the tpm plugin initialized the library, so in order
to use a TPM 2.0 (a required TCTI library is loaded via init), it was
necessary to load it even if none of its actual features were used.

src/aikgen/aikgen.c

@@ -137,7 +137,6 @@ static void exit_aikgen(err_t message, ...)
 		fprintf(stderr, "aikgen error: %s\n", m);
 		status = -1;
 	}
-	library_deinit();
 	exit(status);
 }
 
@@ -194,17 +193,23 @@ int main(int argc, char *argv[])
 	chunk_t aik_blob;
 	hasher_t *hasher;
 
-	atexit(library_deinit);
 	if (!library_init(NULL, "aikgen"))
 	{
 		exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
 	}
+	atexit(library_deinit);
 	if (lib->integrity &&
 		!lib->integrity->check_file(lib->integrity, "aikgen", argv[0]))
 	{
 		fprintf(stderr, "integrity check of aikgen failed\n");
 		exit(SS_RC_DAEMON_INTEGRITY);
 	}
+	if (!libtpmtss_init())
+	{
+		fprintf(stderr, "libtpmtss initialization failed\n");
+		exit(SS_RC_INITIALIZATION_FAILED);
+	}
+	atexit(libtpmtss_deinit);
 
 	/* initialize global variables */
 	options = options_create();