--- lbbs/src/net_server.c	2025/11/21 08:59:29	1.95
+++ lbbs/src/net_server.c	2025/12/02 08:48:05	1.101
@@ -40,6 +40,7 @@
 #include <netinet/in.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
@@ -114,6 +115,11 @@ static int auth_password(ssh_session ses
 	else
 	{
 		ret = check_user(user, password);
+		if (ret == 2) // Enforce update user agreement
+		{
+			BBS_update_eula = 1;
+			ret = 0;
+		}
 	}
 
 	if (ret == 0)
@@ -422,6 +428,8 @@ static int fork_server(void)
 			log_error("Error setting SSH options: %s\n", ssh_get_error(SSH_session));
 			goto cleanup;
 		}
+
+		ssh_set_blocking(SSH_session, 0);
 	}
 
 	// Redirect Input
@@ -446,14 +454,12 @@ static int fork_server(void)
 
 	SYS_child_process_count = 0;
 
-#ifdef __MSYS__
-	// Load BWF config
-	if (bwf_load(CONF_BWF) < 0)
+	// BWF compile
+	if (bwf_compile() < 0)
 	{
-		log_error("bwf_load() error\n");
+		log_error("bwf_compile() error\n");
 		goto cleanup;
 	}
-#endif
 
 	bbs_main();
 
@@ -491,10 +497,8 @@ cleanup:
 	ssh_free(SSH_session);
 	ssh_finalize();
 
-#ifdef __MSYS__
-	// Cleanup BWF
-	bwf_unload();
-#endif
+	// BWF cleanup
+	bwf_cleanup();
 
 	// Close Input and Output for client
 	io_cleanup();
@@ -511,6 +515,7 @@ cleanup:
 
 int net_server(const char *hostaddr, in_port_t port[])
 {
+	struct stat file_stat;
 	unsigned int addrlen;
 	int ret;
 	int flags_server[2];
@@ -527,6 +532,7 @@ int net_server(const char *hostaddr, in_
 	time_t tm_notify_child_exit = time(NULL);
 	int i, j;
 	pid_t pid;
+	int ssh_key_valid = 0;
 	int ssh_log_level = SSH_LOG_NOLOG;
 
 #ifdef HAVE_SYSTEMD_SD_DAEMON_H
@@ -537,10 +543,41 @@ int net_server(const char *hostaddr, in_
 
 	sshbind = ssh_bind_new();
 
+	if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_RSA_KEY_FILE) < 0)
+	{
+		log_error("Error loading SSH RSA key: %s\n", SSH_HOST_RSA_KEY_FILE);
+	}
+	else
+	{
+		ssh_key_valid = 1;
+	}
+	if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_ED25519_KEY_FILE) < 0)
+	{
+		log_error("Error loading SSH ED25519 key: %s\n", SSH_HOST_ED25519_KEY_FILE);
+	}
+	else
+	{
+		ssh_key_valid = 1;
+	}
+	if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_ECDSA_KEY_FILE) < 0)
+	{
+		log_error("Error loading SSH ECDSA key: %s\n", SSH_HOST_ECDSA_KEY_FILE);
+	}
+	else
+	{
+		ssh_key_valid = 1;
+	}
+
+	if (!ssh_key_valid)
+	{
+		log_error("Error: no valid SSH host key\n");
+		ssh_bind_free(sshbind);
+		return -1;
+	}
+
 	if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, hostaddr) < 0 ||
 		ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT, &port) < 0 ||
-		ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_KEYFILE) < 0 ||
-		ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY_ALGORITHMS, "ssh-rsa,rsa-sha2-512,rsa-sha2-256") < 0 ||
+		ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY_ALGORITHMS, "+ssh-rsa") < 0 ||
 		ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY, &ssh_log_level) < 0)
 	{
 		log_error("Error setting SSH bind options: %s\n", ssh_get_error(sshbind));
@@ -618,6 +655,8 @@ int net_server(const char *hostaddr, in_
 		fcntl(socket_server[i], F_SETFL, flags_server[i] | O_NONBLOCK);
 	}
 
+	ssh_bind_set_blocking(sshbind, 0);
+
 	hash_dict_pid_sockaddr = hash_dict_create(MAX_CLIENT_LIMIT);
 	if (hash_dict_pid_sockaddr == NULL)
 	{
@@ -765,13 +804,21 @@ int net_server(const char *hostaddr, in_
 				log_error("Reload conf failed\n");
 			}
 
-#ifndef __MSYS__
 			// Reload BWF config
 			if (bwf_load(CONF_BWF) < 0)
 			{
 				log_error("Reload BWF conf failed\n");
 			}
-#endif
+
+			// Get EULA modification tm
+			if (stat(DATA_EULA, &file_stat) == -1)
+			{
+				log_error("stat(%s) error\n", DATA_EULA, errno);
+			}
+			else
+			{
+				BBS_eula_tm = file_stat.st_mtim.tv_sec;
+			}
 
 			if (detach_menu_shm(&bbs_menu) < 0)
 			{