|
@@ -1,489 +0,0 @@
|
|
|
-/* Copyright (c) 2003-2017 Dovecot authors, see the included COPYING file */
|
|
|
-
|
|
|
-#include "lib.h"
|
|
|
-#include "array.h"
|
|
|
-#include "hash.h"
|
|
|
-#include "hostpid.h"
|
|
|
-#include "ioloop.h"
|
|
|
-#include "istream.h"
|
|
|
-#include "ostream.h"
|
|
|
-#include "net.h"
|
|
|
-#include "strescape.h"
|
|
|
-#include "eacces-error.h"
|
|
|
-#include "auth-client-private.h"
|
|
|
-#include "auth-client-request.h"
|
|
|
-#include "auth-server-connection.h"
|
|
|
-
|
|
|
-#include <unistd.h>
|
|
|
-
|
|
|
-#define AUTH_SERVER_CONN_MAX_LINE_LENGTH AUTH_CLIENT_MAX_LINE_LENGTH
|
|
|
-#define AUTH_HANDSHAKE_TIMEOUT (30*1000)
|
|
|
-#define AUTH_SERVER_RECONNECT_TIMEOUT_SECS 5
|
|
|
-
|
|
|
-static void
|
|
|
-auth_server_connection_reconnect(struct auth_server_connection *conn,
|
|
|
- const char *disconnect_reason);
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_input_mech(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- struct auth_mech_desc mech_desc;
|
|
|
-
|
|
|
- if (conn->handshake_received) {
|
|
|
- i_error("BUG: Authentication server already sent handshake");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (args[0] == NULL) {
|
|
|
- i_error("BUG: Authentication server sent broken MECH line");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- i_zero(&mech_desc);
|
|
|
- mech_desc.name = p_strdup(conn->pool, args[0]);
|
|
|
-
|
|
|
- if (strcmp(mech_desc.name, "PLAIN") == 0)
|
|
|
- conn->has_plain_mech = TRUE;
|
|
|
-
|
|
|
- for (args++; *args != NULL; args++) {
|
|
|
- if (strcmp(*args, "private") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_PRIVATE;
|
|
|
- else if (strcmp(*args, "anonymous") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_ANONYMOUS;
|
|
|
- else if (strcmp(*args, "plaintext") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_PLAINTEXT;
|
|
|
- else if (strcmp(*args, "dictionary") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_DICTIONARY;
|
|
|
- else if (strcmp(*args, "active") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_ACTIVE;
|
|
|
- else if (strcmp(*args, "forward-secrecy") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_FORWARD_SECRECY;
|
|
|
- else if (strcmp(*args, "mutual-auth") == 0)
|
|
|
- mech_desc.flags |= MECH_SEC_MUTUAL_AUTH;
|
|
|
- }
|
|
|
- array_append(&conn->available_auth_mechs, &mech_desc, 1);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_input_spid(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- if (conn->handshake_received) {
|
|
|
- i_error("BUG: Authentication server already sent handshake");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (str_to_uint(args[0], &conn->server_pid) < 0) {
|
|
|
- i_error("BUG: Authentication server sent invalid PID");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_input_cuid(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- if (conn->handshake_received) {
|
|
|
- i_error("BUG: Authentication server already sent handshake");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (args[0] == NULL ||
|
|
|
- str_to_uint(args[0], &conn->connect_uid) < 0) {
|
|
|
- i_error("BUG: Authentication server sent broken CUID line");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_input_cookie(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- if (conn->cookie != NULL) {
|
|
|
- i_error("BUG: Authentication server already sent cookie");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- conn->cookie = p_strdup(conn->pool, args[0]);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int auth_server_input_done(struct auth_server_connection *conn)
|
|
|
-{
|
|
|
- if (array_count(&conn->available_auth_mechs) == 0) {
|
|
|
- i_error("BUG: Authentication server returned no mechanisms");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (conn->cookie == NULL) {
|
|
|
- i_error("BUG: Authentication server didn't send a cookie");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (conn->to != NULL)
|
|
|
- timeout_remove(&conn->to);
|
|
|
-
|
|
|
- conn->handshake_received = TRUE;
|
|
|
- if (conn->client->connect_notify_callback != NULL) {
|
|
|
- conn->client->connect_notify_callback(conn->client, TRUE,
|
|
|
- conn->client->connect_notify_context);
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_lookup_request(struct auth_server_connection *conn,
|
|
|
- const char *id_arg, bool remove,
|
|
|
- struct auth_client_request **request_r)
|
|
|
-{
|
|
|
- struct auth_client_request *request;
|
|
|
- unsigned int id;
|
|
|
-
|
|
|
- if (id_arg == NULL || str_to_uint(id_arg, &id) < 0) {
|
|
|
- i_error("BUG: Authentication server input missing ID");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- request = hash_table_lookup(conn->requests, POINTER_CAST(id));
|
|
|
- if (request == NULL) {
|
|
|
- i_error("BUG: Authentication server sent unknown id %u", id);
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (remove || auth_client_request_is_aborted(request))
|
|
|
- hash_table_remove(conn->requests, POINTER_CAST(id));
|
|
|
-
|
|
|
- *request_r = request;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_input_ok(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- struct auth_client_request *request;
|
|
|
-
|
|
|
- if (auth_server_lookup_request(conn, args[0], TRUE, &request) < 0)
|
|
|
- return -1;
|
|
|
- auth_client_request_server_input(request, AUTH_REQUEST_STATUS_OK,
|
|
|
- args + 1);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int auth_server_input_cont(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- struct auth_client_request *request;
|
|
|
-
|
|
|
- if (str_array_length(args) < 2) {
|
|
|
- i_error("BUG: Authentication server sent broken CONT line");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (auth_server_lookup_request(conn, args[0], FALSE, &request) < 0)
|
|
|
- return -1;
|
|
|
- auth_client_request_server_input(request, AUTH_REQUEST_STATUS_CONTINUE,
|
|
|
- args + 1);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int auth_server_input_fail(struct auth_server_connection *conn,
|
|
|
- const char *const *args)
|
|
|
-{
|
|
|
- struct auth_client_request *request;
|
|
|
-
|
|
|
- if (auth_server_lookup_request(conn, args[0], TRUE, &request) < 0)
|
|
|
- return -1;
|
|
|
- auth_client_request_server_input(request, AUTH_REQUEST_STATUS_FAIL,
|
|
|
- args + 1);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-auth_server_connection_input_line(struct auth_server_connection *conn,
|
|
|
- const char *line)
|
|
|
-{
|
|
|
- const char *const *args;
|
|
|
-
|
|
|
- if (conn->client->debug)
|
|
|
- i_debug("auth input: %s", line);
|
|
|
-
|
|
|
- args = t_strsplit_tabescaped(line);
|
|
|
- if (args[0] == NULL) {
|
|
|
- i_error("Auth server sent empty line");
|
|
|
- return -1;
|
|
|
- }
|
|
|
- if (strcmp(args[0], "OK") == 0)
|
|
|
- return auth_server_input_ok(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "CONT") == 0)
|
|
|
- return auth_server_input_cont(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "FAIL") == 0)
|
|
|
- return auth_server_input_fail(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "MECH") == 0)
|
|
|
- return auth_server_input_mech(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "SPID") == 0)
|
|
|
- return auth_server_input_spid(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "CUID") == 0)
|
|
|
- return auth_server_input_cuid(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "COOKIE") == 0)
|
|
|
- return auth_server_input_cookie(conn, args + 1);
|
|
|
- else if (strcmp(args[0], "DONE") == 0)
|
|
|
- return auth_server_input_done(conn);
|
|
|
- else {
|
|
|
- i_error("Auth server sent unknown command: %s", args[0]);
|
|
|
- return -1;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void auth_server_connection_input(struct auth_server_connection *conn)
|
|
|
-{
|
|
|
- struct istream *input;
|
|
|
- const char *line, *error;
|
|
|
- int ret;
|
|
|
-
|
|
|
- switch (i_stream_read(conn->input)) {
|
|
|
- case 0:
|
|
|
- return;
|
|
|
- case -1:
|
|
|
- /* disconnected */
|
|
|
- error = conn->input->stream_errno != 0 ?
|
|
|
- strerror(conn->input->stream_errno) : "EOF";
|
|
|
- auth_server_connection_reconnect(conn, error);
|
|
|
- return;
|
|
|
- case -2:
|
|
|
- /* buffer full - can't happen unless auth is buggy */
|
|
|
- i_error("BUG: Auth server sent us more than %d bytes of data",
|
|
|
- AUTH_SERVER_CONN_MAX_LINE_LENGTH);
|
|
|
- auth_server_connection_disconnect(conn, "buffer full");
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- if (!conn->version_received) {
|
|
|
- line = i_stream_next_line(conn->input);
|
|
|
- if (line == NULL)
|
|
|
- return;
|
|
|
-
|
|
|
- /* make sure the major version matches */
|
|
|
- if (strncmp(line, "VERSION\t", 8) != 0 ||
|
|
|
- !str_uint_equals(t_strcut(line + 8, '\t'),
|
|
|
- AUTH_CLIENT_PROTOCOL_MAJOR_VERSION)) {
|
|
|
- i_error("Authentication server not compatible with "
|
|
|
- "this client (mixed old and new binaries?)");
|
|
|
- auth_server_connection_disconnect(conn,
|
|
|
- "incompatible server");
|
|
|
- return;
|
|
|
- }
|
|
|
- conn->version_received = TRUE;
|
|
|
- }
|
|
|
-
|
|
|
- input = conn->input;
|
|
|
- i_stream_ref(input);
|
|
|
- while ((line = i_stream_next_line(input)) != NULL && !input->closed) {
|
|
|
- T_BEGIN {
|
|
|
- ret = auth_server_connection_input_line(conn, line);
|
|
|
- } T_END;
|
|
|
-
|
|
|
- if (ret < 0) {
|
|
|
- auth_server_connection_disconnect(conn, t_strdup_printf(
|
|
|
- "Received broken input: %s", line));
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
- i_stream_unref(&input);
|
|
|
-}
|
|
|
-
|
|
|
-struct auth_server_connection *
|
|
|
-auth_server_connection_init(struct auth_client *client)
|
|
|
-{
|
|
|
- struct auth_server_connection *conn;
|
|
|
- pool_t pool;
|
|
|
-
|
|
|
- pool = pool_alloconly_create("auth server connection", 1024);
|
|
|
- conn = p_new(pool, struct auth_server_connection, 1);
|
|
|
- conn->pool = pool;
|
|
|
-
|
|
|
- conn->client = client;
|
|
|
- conn->fd = -1;
|
|
|
- hash_table_create_direct(&conn->requests, pool, 100);
|
|
|
- i_array_init(&conn->available_auth_mechs, 8);
|
|
|
- return conn;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-auth_server_connection_remove_requests(struct auth_server_connection *conn,
|
|
|
- const char *disconnect_reason)
|
|
|
-{
|
|
|
- static const char *const temp_failure_args[] = { "temp", NULL };
|
|
|
- struct hash_iterate_context *iter;
|
|
|
- void *key;
|
|
|
- struct auth_client_request *request;
|
|
|
- time_t created, oldest = 0;
|
|
|
- unsigned int request_count = 0;
|
|
|
-
|
|
|
- if (hash_table_count(conn->requests) == 0)
|
|
|
- return;
|
|
|
-
|
|
|
- iter = hash_table_iterate_init(conn->requests);
|
|
|
- while (hash_table_iterate(iter, conn->requests, &key, &request)) {
|
|
|
- if (!auth_client_request_is_aborted(request)) {
|
|
|
- request_count++;
|
|
|
- created = auth_client_request_get_create_time(request);
|
|
|
- if (oldest > created || oldest == 0)
|
|
|
- oldest = created;
|
|
|
- }
|
|
|
-
|
|
|
- auth_client_request_server_input(request,
|
|
|
- AUTH_REQUEST_STATUS_INTERNAL_FAIL,
|
|
|
- temp_failure_args);
|
|
|
- }
|
|
|
- hash_table_iterate_deinit(&iter);
|
|
|
- hash_table_clear(conn->requests, FALSE);
|
|
|
-
|
|
|
- if (request_count > 0) {
|
|
|
- i_warning("Auth connection closed with %u pending requests "
|
|
|
- "(max %u secs, pid=%s, %s)", request_count,
|
|
|
- (unsigned int)(ioloop_time - oldest),
|
|
|
- my_pid, disconnect_reason);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-void auth_server_connection_disconnect(struct auth_server_connection *conn,
|
|
|
- const char *reason)
|
|
|
-{
|
|
|
- conn->handshake_received = FALSE;
|
|
|
- conn->version_received = FALSE;
|
|
|
- conn->has_plain_mech = FALSE;
|
|
|
- conn->server_pid = 0;
|
|
|
- conn->connect_uid = 0;
|
|
|
- conn->cookie = NULL;
|
|
|
- array_clear(&conn->available_auth_mechs);
|
|
|
-
|
|
|
- if (conn->to != NULL)
|
|
|
- timeout_remove(&conn->to);
|
|
|
- if (conn->io != NULL)
|
|
|
- io_remove(&conn->io);
|
|
|
- if (conn->fd != -1) {
|
|
|
- i_stream_destroy(&conn->input);
|
|
|
- o_stream_destroy(&conn->output);
|
|
|
-
|
|
|
- if (close(conn->fd) < 0)
|
|
|
- i_error("close(auth server connection) failed: %m");
|
|
|
- conn->fd = -1;
|
|
|
- }
|
|
|
-
|
|
|
- auth_server_connection_remove_requests(conn, reason);
|
|
|
-
|
|
|
- if (conn->client->connect_notify_callback != NULL) {
|
|
|
- conn->client->connect_notify_callback(conn->client, FALSE,
|
|
|
- conn->client->connect_notify_context);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void auth_server_reconnect_timeout(struct auth_server_connection *conn)
|
|
|
-{
|
|
|
- (void)auth_server_connection_connect(conn);
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-auth_server_connection_reconnect(struct auth_server_connection *conn,
|
|
|
- const char *disconnect_reason)
|
|
|
-{
|
|
|
- time_t next_connect;
|
|
|
-
|
|
|
- auth_server_connection_disconnect(conn, disconnect_reason);
|
|
|
-
|
|
|
- next_connect = conn->last_connect + AUTH_SERVER_RECONNECT_TIMEOUT_SECS;
|
|
|
- conn->to = timeout_add(ioloop_time >= next_connect ? 0 :
|
|
|
- (next_connect - ioloop_time) * 1000,
|
|
|
- auth_server_reconnect_timeout, conn);
|
|
|
-}
|
|
|
-
|
|
|
-void auth_server_connection_deinit(struct auth_server_connection **_conn)
|
|
|
-{
|
|
|
- struct auth_server_connection *conn = *_conn;
|
|
|
-
|
|
|
- *_conn = NULL;
|
|
|
-
|
|
|
- auth_server_connection_disconnect(conn, "deinitializing");
|
|
|
- i_assert(hash_table_count(conn->requests) == 0);
|
|
|
- hash_table_destroy(&conn->requests);
|
|
|
- array_free(&conn->available_auth_mechs);
|
|
|
- pool_unref(&conn->pool);
|
|
|
-}
|
|
|
-
|
|
|
-static void auth_client_handshake_timeout(struct auth_server_connection *conn)
|
|
|
-{
|
|
|
- i_error("Timeout waiting for handshake from auth server. "
|
|
|
- "my pid=%u, input bytes=%"PRIuUOFF_T,
|
|
|
- conn->client->client_pid, conn->input->v_offset);
|
|
|
- auth_server_connection_reconnect(conn, "auth server timeout");
|
|
|
-}
|
|
|
-
|
|
|
-int auth_server_connection_connect(struct auth_server_connection *conn)
|
|
|
-{
|
|
|
- const char *handshake;
|
|
|
- int fd;
|
|
|
-
|
|
|
- i_assert(conn->fd == -1);
|
|
|
-
|
|
|
- conn->last_connect = ioloop_time;
|
|
|
- if (conn->to != NULL)
|
|
|
- timeout_remove(&conn->to);
|
|
|
-
|
|
|
- /* max. 1 second wait here. */
|
|
|
- fd = net_connect_unix_with_retries(conn->client->auth_socket_path,
|
|
|
- 1000);
|
|
|
- if (fd == -1) {
|
|
|
- if (errno == EACCES) {
|
|
|
- i_error("auth: %s",
|
|
|
- eacces_error_get("connect",
|
|
|
- conn->client->auth_socket_path));
|
|
|
- } else {
|
|
|
- i_error("auth: connect(%s) failed: %m",
|
|
|
- conn->client->auth_socket_path);
|
|
|
- }
|
|
|
- return -1;
|
|
|
- }
|
|
|
- conn->fd = fd;
|
|
|
- conn->io = io_add(fd, IO_READ, auth_server_connection_input, conn);
|
|
|
- conn->input = i_stream_create_fd(fd, AUTH_SERVER_CONN_MAX_LINE_LENGTH,
|
|
|
- FALSE);
|
|
|
- conn->output = o_stream_create_fd(fd, (size_t)-1, FALSE);
|
|
|
-
|
|
|
- handshake = t_strdup_printf("VERSION\t%u\t%u\nCPID\t%u\n",
|
|
|
- AUTH_CLIENT_PROTOCOL_MAJOR_VERSION,
|
|
|
- AUTH_CLIENT_PROTOCOL_MINOR_VERSION,
|
|
|
- conn->client->client_pid);
|
|
|
- if (o_stream_send_str(conn->output, handshake) < 0) {
|
|
|
- i_warning("Error sending handshake to auth server: %s",
|
|
|
- o_stream_get_error(conn->output));
|
|
|
- auth_server_connection_disconnect(conn,
|
|
|
- o_stream_get_error(conn->output));
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- conn->to = timeout_add(AUTH_HANDSHAKE_TIMEOUT,
|
|
|
- auth_client_handshake_timeout, conn);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-unsigned int
|
|
|
-auth_server_connection_add_request(struct auth_server_connection *conn,
|
|
|
- struct auth_client_request *request)
|
|
|
-{
|
|
|
- unsigned int id;
|
|
|
-
|
|
|
- id = ++conn->client->request_id_counter;
|
|
|
- if (id == 0) {
|
|
|
- /* wrapped - ID 0 not allowed */
|
|
|
- id = ++conn->client->request_id_counter;
|
|
|
- }
|
|
|
- i_assert(hash_table_lookup(conn->requests, POINTER_CAST(id)) == NULL);
|
|
|
- hash_table_insert(conn->requests, POINTER_CAST(id), request);
|
|
|
- return id;
|
|
|
-}
|
|
|
-
|
|
|
-void auth_server_connection_remove_request(struct auth_server_connection *conn, unsigned int id)
|
|
|
-{
|
|
|
- i_assert(conn->handshake_received);
|
|
|
- hash_table_remove(conn->requests, POINTER_CAST(id));
|
|
|
-}
|