Adding upstream version 1:9.6p1.upstream/1%9.6p1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 323 insertions, 0 deletions

diff --git a/servconf.h b/servconf.h
new file mode 100644
index 0000000..ed7b72e
--- /dev/null
+++ b/servconf.h
@@ -0,0 +1,323 @@
+/* $OpenBSD: servconf.h,v 1.160 2023/09/06 23:35:35 djm Exp $ */
+
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ *                    All rights reserved
+ * Definitions for server configuration data and for the functions reading it.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose.  Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+
+#ifndef SERVCONF_H
+#define SERVCONF_H
+
+#include <openbsd-compat/sys-queue.h>
+
+#define MAX_PORTS		256	/* Max # ports. */
+
+/* permit_root_login */
+#define	PERMIT_NOT_SET		-1
+#define	PERMIT_NO		0
+#define	PERMIT_FORCED_ONLY	1
+#define	PERMIT_NO_PASSWD	2
+#define	PERMIT_YES		3
+
+/* use_privsep */
+#define PRIVSEP_OFF		0
+#define PRIVSEP_ON		1
+#define PRIVSEP_NOSANDBOX	2
+
+/* PermitOpen */
+#define PERMITOPEN_ANY		0
+#define PERMITOPEN_NONE		-2
+
+/* IgnoreRhosts */
+#define IGNORE_RHOSTS_NO	0
+#define IGNORE_RHOSTS_YES	1
+#define IGNORE_RHOSTS_SHOSTS	2
+
+#define DEFAULT_AUTH_FAIL_MAX	6	/* Default for MaxAuthTries */
+#define DEFAULT_SESSIONS_MAX	10	/* Default for MaxSessions */
+
+/* Magic name for internal sftp-server */
+#define INTERNAL_SFTP_NAME	"internal-sftp"
+
+/* PubkeyAuthOptions flags */
+#define PUBKEYAUTH_TOUCH_REQUIRED	(1)
+#define PUBKEYAUTH_VERIFY_REQUIRED	(1<<1)
+
+struct ssh;
+struct fwd_perm_list;
+
+/*
+ * Used to store addresses from ListenAddr directives. These may be
+ * incomplete, as they may specify addresses that need to be merged
+ * with any ports requested by ListenPort.
+ */
+struct queued_listenaddr {
+	char *addr;
+	int port; /* <=0 if unspecified */
+	char *rdomain;
+};
+
+/* Resolved listen addresses, grouped by optional routing domain */
+struct listenaddr {
+	char *rdomain;
+	struct addrinfo *addrs;
+};
+
+typedef struct {
+	u_int	num_ports;
+	u_int	ports_from_cmdline;
+	int	ports[MAX_PORTS];	/* Port number to listen on. */
+	struct queued_listenaddr *queued_listen_addrs;
+	u_int	num_queued_listens;
+	struct listenaddr *listen_addrs;
+	u_int	num_listen_addrs;
+	int	address_family;		/* Address family used by the server. */
+
+	char	*routing_domain;	/* Bind session to routing domain */
+
+	char   **host_key_files;	/* Files containing host keys. */
+	int	*host_key_file_userprovided; /* Key was specified by user. */
+	u_int	num_host_key_files;     /* Number of files for host keys. */
+	char   **host_cert_files;	/* Files containing host certs. */
+	u_int	num_host_cert_files;	/* Number of files for host certs. */
+
+	char   *host_key_agent;		/* ssh-agent socket for host keys. */
+	char   *pid_file;		/* Where to put our pid */
+	char   *moduli_file;		/* moduli file for DH-GEX */
+	int     login_grace_time;	/* Disconnect if no auth in this time
+					 * (sec). */
+	int     permit_root_login;	/* PERMIT_*, see above */
+	int     ignore_rhosts;	/* Ignore .rhosts and .shosts. */
+	int     ignore_user_known_hosts;	/* Ignore ~/.ssh/known_hosts
+						 * for RhostsRsaAuth */
+	int     print_motd;	/* If true, print /etc/motd. */
+	int	print_lastlog;	/* If true, print lastlog */
+	int     x11_forwarding;	/* If true, permit inet (spoofing) X11 fwd. */
+	int     x11_display_offset;	/* What DISPLAY number to start
+					 * searching at */
+	int     x11_use_localhost;	/* If true, use localhost for fake X11 server. */
+	char   *xauth_location;	/* Location of xauth program */
+	int	permit_tty;	/* If false, deny pty allocation */
+	int	permit_user_rc;	/* If false, deny ~/.ssh/rc execution */
+	int     strict_modes;	/* If true, require string home dir modes. */
+	int     tcp_keep_alive;	/* If true, set SO_KEEPALIVE. */
+	int	ip_qos_interactive;	/* IP ToS/DSCP/class for interactive */
+	int	ip_qos_bulk;		/* IP ToS/DSCP/class for bulk traffic */
+	char   *ciphers;	/* Supported SSH2 ciphers. */
+	char   *macs;		/* Supported SSH2 macs. */
+	char   *kex_algorithms;	/* SSH2 kex methods in order of preference. */
+	struct ForwardOptions fwd_opts;	/* forwarding options */
+	SyslogFacility log_facility;	/* Facility for system logging. */
+	LogLevel log_level;	/* Level for system logging. */
+	u_int	num_log_verbose;	/* Verbose log overrides */
+	char	**log_verbose;
+	int     hostbased_authentication;	/* If true, permit ssh2 hostbased auth */
+	int     hostbased_uses_name_from_packet_only; /* experimental */
+	char   *hostbased_accepted_algos; /* Algos allowed for hostbased */
+	char   *hostkeyalgorithms;	/* SSH2 server key types */
+	char   *ca_sign_algorithms;	/* Allowed CA signature algorithms */
+	int     pubkey_authentication;	/* If true, permit ssh2 pubkey authentication. */
+	char   *pubkey_accepted_algos;	/* Signature algos allowed for pubkey */
+	int	pubkey_auth_options;	/* -1 or mask of PUBKEYAUTH_* flags */
+	int     kerberos_authentication;	/* If true, permit Kerberos
+						 * authentication. */
+	int     kerberos_or_local_passwd;	/* If true, permit kerberos
+						 * and any other password
+						 * authentication mechanism,
+						 * such as SecurID or
+						 * /etc/passwd */
+	int     kerberos_ticket_cleanup;	/* If true, destroy ticket
+						 * file on logout. */
+	int     kerberos_get_afs_token;		/* If true, try to get AFS token if
+						 * authenticated with Kerberos. */
+	int     gss_authentication;	/* If true, permit GSSAPI authentication */
+	int     gss_cleanup_creds;	/* If true, destroy cred cache on logout */
+	int     gss_strict_acceptor;	/* If true, restrict the GSSAPI acceptor name */
+	int     password_authentication;	/* If true, permit password
+						 * authentication. */
+	int     kbd_interactive_authentication;	/* If true, permit */
+	int     permit_empty_passwd;	/* If false, do not permit empty
+					 * passwords. */
+	int     permit_user_env;	/* If true, read ~/.ssh/environment */
+	char   *permit_user_env_allowlist; /* pattern-list of allowed env names */
+	int     compression;	/* If true, compression is allowed */
+	int	allow_tcp_forwarding; /* One of FORWARD_* */
+	int	allow_streamlocal_forwarding; /* One of FORWARD_* */
+	int	allow_agent_forwarding;
+	int	disable_forwarding;
+	u_int num_allow_users;
+	char   **allow_users;
+	u_int num_deny_users;
+	char   **deny_users;
+	u_int num_allow_groups;
+	char   **allow_groups;
+	u_int num_deny_groups;
+	char   **deny_groups;
+
+	u_int num_subsystems;
+	char   **subsystem_name;
+	char   **subsystem_command;
+	char   **subsystem_args;
+
+	u_int num_accept_env;
+	char   **accept_env;
+	u_int num_setenv;
+	char   **setenv;
+
+	int	max_startups_begin;
+	int	max_startups_rate;
+	int	max_startups;
+	int	per_source_max_startups;
+	int	per_source_masklen_ipv4;
+	int	per_source_masklen_ipv6;
+	int	max_authtries;
+	int	max_sessions;
+	char   *banner;			/* SSH-2 banner message */
+	int	use_dns;
+	int	client_alive_interval;	/*
+					 * poke the client this often to
+					 * see if it's still there
+					 */
+	int	client_alive_count_max;	/*
+					 * If the client is unresponsive
+					 * for this many intervals above,
+					 * disconnect the session
+					 */
+
+	u_int	num_authkeys_files;	/* Files containing public keys */
+	char   **authorized_keys_files;
+
+	char   *adm_forced_command;
+
+	int	use_pam;		/* Enable auth via PAM */
+
+	int	permit_tun;
+
+	char   **permitted_opens;	/* May also be one of PERMITOPEN_* */
+	u_int   num_permitted_opens;
+	char   **permitted_listens; /* May also be one of PERMITOPEN_* */
+	u_int   num_permitted_listens;
+
+	char   *chroot_directory;
+	char   *revoked_keys_file;
+	char   *trusted_user_ca_keys;
+	char   *authorized_keys_command;
+	char   *authorized_keys_command_user;
+	char   *authorized_principals_file;
+	char   *authorized_principals_command;
+	char   *authorized_principals_command_user;
+
+	int64_t rekey_limit;
+	int	rekey_interval;
+
+	char   *version_addendum;	/* Appended to SSH banner */
+
+	u_int	num_auth_methods;
+	char   **auth_methods;
+
+	int	fingerprint_hash;
+	int	expose_userauth_info;
+	u_int64_t timing_secret;
+	char   *sk_provider;
+	int	required_rsa_size;	/* minimum size of RSA keys */
+
+	char	**channel_timeouts;	/* inactivity timeout by channel type */
+	u_int	num_channel_timeouts;
+
+	int	unused_connection_timeout;
+}       ServerOptions;
+
+/* Information about the incoming connection as used by Match */
+struct connection_info {
+	const char *user;
+	const char *host;	/* possibly resolved hostname */
+	const char *address;	/* remote address */
+	const char *laddress;	/* local address */
+	int lport;		/* local port */
+	const char *rdomain;	/* routing domain if available */
+	int test;		/* test mode, allow some attributes to be
+				 * unspecified */
+};
+
+/* List of included files for re-exec from the parsed configuration */
+struct include_item {
+	char *selector;
+	char *filename;
+	struct sshbuf *contents;
+	TAILQ_ENTRY(include_item) entry;
+};
+TAILQ_HEAD(include_list, include_item);
+
+
+/*
+ * These are string config options that must be copied between the
+ * Match sub-config and the main config, and must be sent from the
+ * privsep child to the privsep master. We use a macro to ensure all
+ * the options are copied and the copies are done in the correct order.
+ *
+ * NB. an option must appear in servconf.c:copy_set_server_options() or
+ * COPY_MATCH_STRING_OPTS here but never both.
+ */
+#define COPY_MATCH_STRING_OPTS() do { \
+		M_CP_STROPT(banner); \
+		M_CP_STROPT(trusted_user_ca_keys); \
+		M_CP_STROPT(revoked_keys_file); \
+		M_CP_STROPT(authorized_keys_command); \
+		M_CP_STROPT(authorized_keys_command_user); \
+		M_CP_STROPT(authorized_principals_file); \
+		M_CP_STROPT(authorized_principals_command); \
+		M_CP_STROPT(authorized_principals_command_user); \
+		M_CP_STROPT(hostbased_accepted_algos); \
+		M_CP_STROPT(pubkey_accepted_algos); \
+		M_CP_STROPT(ca_sign_algorithms); \
+		M_CP_STROPT(routing_domain); \
+		M_CP_STROPT(permit_user_env_allowlist); \
+		M_CP_STRARRAYOPT(authorized_keys_files, num_authkeys_files); \
+		M_CP_STRARRAYOPT(allow_users, num_allow_users); \
+		M_CP_STRARRAYOPT(deny_users, num_deny_users); \
+		M_CP_STRARRAYOPT(allow_groups, num_allow_groups); \
+		M_CP_STRARRAYOPT(deny_groups, num_deny_groups); \
+		M_CP_STRARRAYOPT(accept_env, num_accept_env); \
+		M_CP_STRARRAYOPT(setenv, num_setenv); \
+		M_CP_STRARRAYOPT(auth_methods, num_auth_methods); \
+		M_CP_STRARRAYOPT(permitted_opens, num_permitted_opens); \
+		M_CP_STRARRAYOPT(permitted_listens, num_permitted_listens); \
+		M_CP_STRARRAYOPT(channel_timeouts, num_channel_timeouts); \
+		M_CP_STRARRAYOPT(log_verbose, num_log_verbose); \
+		M_CP_STRARRAYOPT(subsystem_name, num_subsystems); \
+		M_CP_STRARRAYOPT(subsystem_command, num_subsystems); \
+		M_CP_STRARRAYOPT(subsystem_args, num_subsystems); \
+	} while (0)
+
+struct connection_info *get_connection_info(struct ssh *, int, int);
+void	 initialize_server_options(ServerOptions *);
+void	 fill_default_server_options(ServerOptions *);
+int	 process_server_config_line(ServerOptions *, char *, const char *, int,
+	    int *, struct connection_info *, struct include_list *includes);
+void	 process_permitopen(struct ssh *ssh, ServerOptions *options);
+void	 process_channel_timeouts(struct ssh *ssh, ServerOptions *);
+void	 load_server_config(const char *, struct sshbuf *);
+void	 parse_server_config(ServerOptions *, const char *, struct sshbuf *,
+	    struct include_list *includes, struct connection_info *, int);
+void	 parse_server_match_config(ServerOptions *,
+	    struct include_list *includes, struct connection_info *);
+int	 parse_server_match_testspec(struct connection_info *, char *);
+int	 server_match_spec_complete(struct connection_info *);
+void	 servconf_merge_subsystems(ServerOptions *, ServerOptions *);
+void	 copy_set_server_options(ServerOptions *, ServerOptions *, int);
+void	 dump_config(ServerOptions *);
+char	*derelativise_path(const char *);
+void	 servconf_add_hostkey(const char *, const int,
+	    ServerOptions *, const char *path, int);
+void	 servconf_add_hostcert(const char *, const int,
+	    ServerOptions *, const char *path);
+
+#endif				/* SERVCONF_H */