Adding upstream version 1:2.3.21+dfsg1.upstream/1%2.3.21+dfsg1

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

1 files changed, 373 insertions, 0 deletions

diff --git a/src/login-common/client-common.h b/src/login-common/client-common.h
new file mode 100644
index 0000000..a21dea1
--- /dev/null
+++ b/src/login-common/client-common.h
@@ -0,0 +1,373 @@
+#ifndef CLIENT_COMMON_H
+#define CLIENT_COMMON_H
+
+struct module;
+
+#include "net.h"
+#include "login-proxy.h"
+#include "sasl-server.h"
+#include "master-login.h" /* for LOGIN_MAX_SESSION_ID_LEN */
+
+#define LOGIN_MAX_SESSION_ID_LEN 64
+#define LOGIN_MAX_MASTER_PREFIX_LEN 128
+#define LOGIN_MAX_CLIENT_ID_LEN 256
+
+/* max. size of input buffer. this means:
+
+   IMAP: Max. length of command's all parameters. SASL-IR is read into
+         a separate larger buffer.
+   POP3: Max. length of a command line (spec says 512 would be enough)
+*/
+#define LOGIN_MAX_INBUF_SIZE \
+	(MASTER_AUTH_MAX_DATA_SIZE - LOGIN_MAX_MASTER_PREFIX_LEN - \
+	 LOGIN_MAX_SESSION_ID_LEN)
+/* max. size of output buffer. if it gets full, the client is disconnected.
+   SASL authentication gives the largest output. */
+#define LOGIN_MAX_OUTBUF_SIZE 4096
+
+/* Max. length of SASL authentication buffer. */
+#define LOGIN_MAX_AUTH_BUF_SIZE 8192
+
+/* Disconnect client after this many milliseconds if it hasn't managed
+   to log in yet. */
+#define CLIENT_LOGIN_TIMEOUT_MSECS (MASTER_LOGIN_TIMEOUT_SECS*1000)
+
+#define AUTH_SERVER_WAITING_MSG \
+	"Waiting for authentication process to respond.."
+#define AUTH_MASTER_WAITING_MSG \
+	"Waiting for authentication master process to respond.."
+
+/* Client logged out without having successfully authenticated. */
+#define CLIENT_UNAUTHENTICATED_LOGOUT_MSG \
+	"Aborted login by logging out"
+
+struct master_service_connection;
+
+enum client_disconnect_reason {
+	CLIENT_DISCONNECT_TIMEOUT,
+	CLIENT_DISCONNECT_SYSTEM_SHUTDOWN,
+	CLIENT_DISCONNECT_RESOURCE_CONSTRAINT,
+	CLIENT_DISCONNECT_INTERNAL_ERROR
+};
+
+enum client_auth_fail_code {
+	CLIENT_AUTH_FAIL_CODE_NONE = 0,
+	CLIENT_AUTH_FAIL_CODE_AUTHZFAILED,
+	CLIENT_AUTH_FAIL_CODE_TEMPFAIL,
+	CLIENT_AUTH_FAIL_CODE_USER_DISABLED,
+	CLIENT_AUTH_FAIL_CODE_PASS_EXPIRED,
+	CLIENT_AUTH_FAIL_CODE_INVALID_BASE64,
+	CLIENT_AUTH_FAIL_CODE_LOGIN_DISABLED,
+	CLIENT_AUTH_FAIL_CODE_MECH_INVALID,
+	CLIENT_AUTH_FAIL_CODE_MECH_SSL_REQUIRED,
+	CLIENT_AUTH_FAIL_CODE_ANONYMOUS_DENIED,
+};
+
+enum client_auth_result {
+	CLIENT_AUTH_RESULT_SUCCESS,
+	CLIENT_AUTH_RESULT_REFERRAL_SUCCESS,
+	CLIENT_AUTH_RESULT_REFERRAL_NOLOGIN,
+	CLIENT_AUTH_RESULT_ABORTED,
+	CLIENT_AUTH_RESULT_AUTHFAILED,
+	CLIENT_AUTH_RESULT_AUTHFAILED_REASON,
+	CLIENT_AUTH_RESULT_AUTHZFAILED,
+	CLIENT_AUTH_RESULT_TEMPFAIL,
+	CLIENT_AUTH_RESULT_PASS_EXPIRED,
+	CLIENT_AUTH_RESULT_SSL_REQUIRED,
+	CLIENT_AUTH_RESULT_INVALID_BASE64,
+	CLIENT_AUTH_RESULT_LOGIN_DISABLED,
+	CLIENT_AUTH_RESULT_MECH_INVALID,
+	CLIENT_AUTH_RESULT_MECH_SSL_REQUIRED,
+	CLIENT_AUTH_RESULT_ANONYMOUS_DENIED
+};
+
+enum client_list_type {
+	CLIENT_LIST_TYPE_NONE = 0,
+	/* clients (disconnected=FALSE, fd_proxying=FALSE, destroyed=FALSE) */
+	CLIENT_LIST_TYPE_ACTIVE,
+	/* destroyed_clients (destroyed=TRUE, fd_proxying=FALSE). Either the
+	   client will soon be freed or it's only referenced via
+	   "login_proxies". */
+	CLIENT_LIST_TYPE_DESTROYED,
+	/* client_fd_proxies (fd_proxying=TRUE) */
+	CLIENT_LIST_TYPE_FD_PROXY,
+};
+
+struct client_auth_reply {
+	const char *master_user, *reason;
+	enum client_auth_fail_code fail_code;
+
+	/* for proxying */
+	const char *host, *hostip, *source_ip;
+	const char *destuser, *password, *proxy_mech;
+	in_port_t port;
+	unsigned int proxy_timeout_msecs;
+	unsigned int proxy_refresh_secs;
+	unsigned int proxy_host_immediate_failure_after_secs;
+	enum login_proxy_ssl_flags ssl_flags;
+
+	/* all the key=value fields returned by passdb */
+	const char *const *all_fields;
+
+	bool proxy:1;
+	bool proxy_noauth:1;
+	bool proxy_nopipelining:1;
+	bool proxy_not_trusted:1;
+	bool nologin:1;
+};
+
+struct client_vfuncs {
+	struct client *(*alloc)(pool_t pool);
+	void (*create)(struct client *client, void **other_sets);
+	void (*destroy)(struct client *client);
+	void (*notify_auth_ready)(struct client *client);
+	void (*notify_disconnect)(struct client *client,
+				  enum client_disconnect_reason reason,
+				  const char *text);
+	void (*notify_status)(struct client *client,
+			      bool bad, const char *text);
+	void (*notify_starttls)(struct client *client,
+				bool success, const char *text);
+	void (*starttls)(struct client *client);
+	void (*input)(struct client *client);
+	bool (*sasl_filter_mech)(struct client *client,
+				 struct auth_mech_desc *mech);
+	bool (*sasl_check_login)(struct client *client);
+	void (*auth_send_challenge)(struct client *client, const char *data);
+	void (*auth_parse_response)(struct client *client);
+	void (*auth_result)(struct client *client,
+			    enum client_auth_result result,
+			    const struct client_auth_reply *reply,
+			    const char *text);
+	void (*proxy_reset)(struct client *client);
+	int (*proxy_parse_line)(struct client *client, const char *line);
+	void (*proxy_failed)(struct client *client,
+			     enum login_proxy_failure_type type,
+			     const char *reason, bool reconnecting);
+	const char *(*proxy_get_state)(struct client *client);
+	void (*send_raw_data)(struct client *client,
+			      const void *data, size_t size);
+	bool (*input_next_cmd)(struct client *client);
+	void (*free)(struct client *client);
+};
+
+struct client {
+	struct client *prev, *next;
+	/* Specifies which linked list the client is in */
+	enum client_list_type list_type;
+
+	pool_t pool;
+	/* this pool gets free'd once proxying starts */
+	pool_t preproxy_pool;
+	struct client_vfuncs v;
+	struct client_vfuncs *vlast;
+
+	struct timeval created;
+	int refcount;
+	struct event *event;
+
+	struct ip_addr local_ip;
+	struct ip_addr ip;
+	struct ip_addr real_remote_ip, real_local_ip;
+	in_port_t local_port, remote_port;
+	in_port_t real_local_port, real_remote_port;
+	struct ssl_iostream *ssl_iostream;
+	const struct login_settings *set;
+	const struct master_service_ssl_settings *ssl_set;
+	const struct master_service_ssl_server_settings *ssl_server_set;
+	const char *session_id, *listener_name, *postlogin_socket_path;
+	const char *local_name;
+	const char *client_cert_common_name;
+
+	string_t *client_id;
+	string_t *forward_fields;
+
+	int fd;
+	struct istream *input;
+	struct ostream *output;
+	struct io *io;
+	struct iostream_proxy *iostream_fd_proxy;
+	struct timeout *to_auth_waiting;
+	struct timeout *to_disconnect;
+
+	unsigned char *master_data_prefix;
+	unsigned int master_data_prefix_len;
+
+	struct login_proxy *login_proxy;
+	char *proxy_user, *proxy_master_user, *proxy_password;
+	const struct dsasl_client_mech *proxy_mech;
+	struct dsasl_client *proxy_sasl_client;
+	unsigned int proxy_ttl;
+
+	char *auth_mech_name;
+	enum sasl_server_auth_flags auth_flags;
+	struct auth_client_request *auth_request;
+	string_t *auth_response;
+	time_t auth_first_started, auth_finished;
+	const char *sasl_final_resp;
+	const char *sasl_final_delayed_resp;
+	enum sasl_server_reply delayed_final_reply;
+	const char *const *final_args;
+	const char *const *auth_passdb_args;
+	struct anvil_query *anvil_query;
+	struct anvil_request *anvil_request;
+
+	unsigned int master_auth_id;
+	unsigned int master_tag;
+	sasl_server_callback_t *sasl_callback;
+
+	unsigned int bad_counter;
+	unsigned int auth_attempts, auth_successes;
+	enum client_auth_fail_code last_auth_fail;
+	pid_t mail_pid;
+
+	/* Module-specific contexts. */
+	ARRAY(union login_client_module_context *) module_contexts;
+
+	char *virtual_user, *virtual_user_orig, *virtual_auth_user;
+	/* passdb user_* fields are set here after a successful auth.
+	   This is a NULL-terminated array where fields are in the same order
+	   as in global_alt_usernames. If some field doesn't exist, it's "".
+	   Can also be NULL if there are no user_* fields. */
+	const char **alt_usernames;
+	/* director_username_hash cached, if non-zero */
+	unsigned int director_username_hash_cache;
+
+	bool create_finished:1;
+	bool disconnected:1;
+	bool destroyed:1;
+	bool input_blocked:1;
+	bool login_success:1;
+	bool no_extra_disconnect_reason:1;
+	bool starttls:1;
+	bool tls:1;
+	bool proxied_ssl:1;
+	bool secured:1;
+	bool ssl_secured:1;
+	bool trusted:1;
+	bool ssl_servername_settings_read:1;
+	bool banner_sent:1;
+	bool authenticating:1;
+	bool auth_client_continue_pending:1;
+	bool auth_try_aborted:1;
+	bool auth_initializing:1;
+	bool auth_process_comm_fail:1;
+	bool auth_anonymous:1;
+	bool proxy_auth_failed:1;
+	bool proxy_noauth:1;
+	bool proxy_nopipelining:1;
+	bool proxy_not_trusted:1;
+	bool auth_waiting:1;
+	bool notified_auth_ready:1;
+	bool notified_disconnect:1;
+	bool fd_proxying:1;
+	bool final_response:1;
+	/* ... */
+};
+
+union login_client_module_context {
+	struct client_vfuncs super;
+	struct login_module_register *reg;
+};
+
+struct login_client_hooks {
+	void (*client_allocated)(struct client *client);
+};
+
+extern struct client *clients;
+
+typedef void login_client_allocated_func_t(struct client *client);
+
+void login_client_hooks_add(struct module *module,
+			    const struct login_client_hooks *hooks);
+void login_client_hooks_remove(const struct login_client_hooks *hooks);
+
+struct client *
+client_alloc(int fd, pool_t pool,
+	     const struct master_service_connection *conn,
+	     const struct login_settings *set,
+	     const struct master_service_ssl_settings *ssl_set,
+	     const struct master_service_ssl_server_settings *ssl_server_set);
+void client_init(struct client *client, void **other_sets);
+void client_disconnect(struct client *client, const char *reason,
+		       bool add_disconnected_prefix);
+void client_destroy(struct client *client, const char *reason);
+void client_destroy_iostream_error(struct client *client);
+/* Destroy the client after a successful login. Either the client fd was
+   sent to the post-login process, or the connection will be proxied. */
+void client_destroy_success(struct client *client, const char *reason);
+
+void client_ref(struct client *client);
+bool client_unref(struct client **client) ATTR_NOWARN_UNUSED_RESULT;
+
+int client_init_ssl(struct client *client);
+void client_cmd_starttls(struct client *client);
+
+int client_get_plaintext_fd(struct client *client, int *fd_r, bool *close_fd_r);
+
+unsigned int clients_get_count(void) ATTR_PURE;
+unsigned int clients_get_fd_proxies_count(void);
+struct client *clients_get_first_fd_proxy(void);
+
+void client_add_forward_field(struct client *client, const char *key,
+			      const char *value);
+void client_set_title(struct client *client);
+const char *client_get_extra_disconnect_reason(struct client *client);
+
+void client_auth_respond(struct client *client, const char *response);
+void client_auth_abort(struct client *client);
+bool client_is_tls_enabled(struct client *client);
+void client_auth_fail(struct client *client, const char *text);
+const char *client_get_session_id(struct client *client);
+
+bool client_read(struct client *client);
+
+void client_input(struct client *client);
+
+static inline bool
+client_does_custom_io(struct client *client)
+{
+	return (client->v.input == NULL);
+}
+
+void client_notify_auth_ready(struct client *client);
+void client_notify_status(struct client *client, bool bad, const char *text);
+void client_notify_disconnect(struct client *client,
+			      enum client_disconnect_reason reason,
+			      const char *text);
+
+void client_send_raw_data(struct client *client, const void *data, size_t size);
+void client_send_raw(struct client *client, const char *data);
+void client_common_send_raw_data(struct client *client,
+				 const void *data, size_t size);
+void client_common_default_free(struct client *client);
+void client_common_proxy_failed(struct client *client,
+				enum login_proxy_failure_type type,
+				const char *reason, bool reconnecting);
+
+void client_set_auth_waiting(struct client *client);
+void client_auth_send_challenge(struct client *client, const char *data);
+void client_auth_parse_response(struct client *client);
+int client_auth_begin(struct client *client, const char *mech_name,
+		      const char *init_resp);
+int client_auth_begin_private(struct client *client, const char *mech_name,
+			      const char *init_resp);
+int client_auth_begin_implicit(struct client *client, const char *mech_name,
+			       const char *init_resp);
+bool client_check_plaintext_auth(struct client *client, bool pass_sent);
+int client_auth_read_line(struct client *client);
+
+void client_proxy_finish_destroy_client(struct client *client);
+void client_proxy_log_failure(struct client *client, const char *line);
+const char *client_proxy_get_state(struct client *client);
+
+void clients_notify_auth_connected(void);
+bool client_destroy_oldest(bool kill, struct timeval *created_r);
+void clients_destroy_all(void);
+void clients_destroy_all_reason(const char *reason);
+
+void client_destroy_fd_proxies(void);
+void client_common_init(void);
+void client_common_deinit(void);
+
+#endif