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upstream: allow override of Sybsystem directives in sshd Match 

blocks

OpenBSD-Commit-ID: 3911d18a826a2d2fe7e4519075cf3e57af439722
This commit is contained in:
djm@openbsd.org 2023-09-06 23:35:35 +00:00 committed by Damien Miller
parent 6e52826e2a
commit 8a1450c620
No known key found for this signature in database
2 changed files with 54 additions and 8 deletions
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48
servconf.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: servconf.c,v 1.400 2023/09/06 23:26:37 djm Exp $ */
/* $OpenBSD: servconf.c,v 1.401 2023/09/06 23:35:35 djm Exp $ */
/*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
@ -643,7 +643,7 @@ static struct {
{ "macs", sMacs, SSHCFG_GLOBAL },
{ "protocol", sIgnore, SSHCFG_GLOBAL },
{ "gatewayports", sGatewayPorts, SSHCFG_ALL },
{ "subsystem", sSubsystem, SSHCFG_GLOBAL },
{ "subsystem", sSubsystem, SSHCFG_ALL },
{ "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
{ "persourcemaxstartups", sPerSourceMaxStartups, SSHCFG_GLOBAL },
{ "persourcenetblocksize", sPerSourceNetBlockSize, SSHCFG_GLOBAL },
@ -2694,6 +2694,47 @@ int parse_server_match_testspec(struct connection_info *ci, char *spec)
return 0;
}
void
servconf_merge_subsystems(ServerOptions *dst, ServerOptions *src)
{
u_int i, j, found;
for (i = 0; i < src->num_subsystems; i++) {
found = 0;
for (j = 0; j < dst->num_subsystems; j++) {
if (strcmp(src->subsystem_name[i],
dst->subsystem_name[j]) == 0) {
found = 1;
break;
}
}
if (found) {
debug_f("override \"%s\"", dst->subsystem_name[j]);
free(dst->subsystem_command[j]);
free(dst->subsystem_args[j]);
dst->subsystem_command[j] =
xstrdup(src->subsystem_command[i]);
dst->subsystem_args[j] =
xstrdup(src->subsystem_args[i]);
continue;
}
debug_f("add \"%s\"", src->subsystem_name[i]);
dst->subsystem_name = xrecallocarray(
dst->subsystem_name, dst->num_subsystems,
dst->num_subsystems + 1, sizeof(dst->subsystem_name));
dst->subsystem_command = xrecallocarray(
dst->subsystem_command, dst->num_subsystems,
dst->num_subsystems + 1, sizeof(dst->subsystem_command));
dst->subsystem_args = xrecallocarray(
dst->subsystem_args, dst->num_subsystems,
dst->num_subsystems + 1, sizeof(dst->subsystem_args));
j = dst->num_subsystems++;
dst->subsystem_name[j] = xstrdup(src->subsystem_name[i]);
dst->subsystem_command[j] = xstrdup(src->subsystem_command[i]);
dst->subsystem_args[j] = xstrdup(src->subsystem_args[i]);
}
}
/*
* Copy any supported values that are set.
*
@ -2800,6 +2841,9 @@ copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
free(dst->chroot_directory);
dst->chroot_directory = NULL;
}
/* Subsystems require merging. */
servconf_merge_subsystems(dst, src);
}
#undef M_CP_INTOPT

14
servconf.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: servconf.h,v 1.159 2023/01/17 09:44:48 djm Exp $ */
/* $OpenBSD: servconf.h,v 1.160 2023/09/06 23:35:35 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -20,8 +20,6 @@
#define MAX_PORTS 256 /* Max # ports. */
#define MAX_SUBSYSTEMS 256 /* Max # subsystems. */
/* permit_root_login */
#define PERMIT_NOT_SET -1
#define PERMIT_NO 0
@ -165,9 +163,9 @@ typedef struct {
char **deny_groups;
u_int num_subsystems;
char *subsystem_name[MAX_SUBSYSTEMS];
char *subsystem_command[MAX_SUBSYSTEMS];
char *subsystem_args[MAX_SUBSYSTEMS];
char **subsystem_name;
char **subsystem_command;
char **subsystem_args;
u_int num_accept_env;
char **accept_env;
@ -294,6 +292,9 @@ TAILQ_HEAD(include_list, include_item);
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);
@ -310,6 +311,7 @@ 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 *);