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Fix #157: Allow to set terminal modes for PTYs

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Added the new function `ssh_channel_request_pty_size_modes` which allows
to pass additional encoded SSH terminal modes (see opcodes in RFC 4245).

Signed-off-by: Daniel Evers (daniel.evers@utimaco.com)
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This commit is contained in:
Daniel Evers
2023-10-11 19:01:06 +02:00
committed by Jakub Jelen
parent 6ad455a8ac
commit 1291ceb17d
6 changed files with 171 additions and 7 deletions
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145
tests/client/torture_request_pty_modes.c Executable file
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/*
* This file is part of the SSH Library
*
* Copyright (c) 2013 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The SSH Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SSH Library; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#include "config.h"
#define LIBSSH_STATIC
#include "torture.h"
#include <libssh/libssh.h>
#include <sys/types.h>
#include <pwd.h>
#include <errno.h>
static int sshd_setup(void **state)
{
torture_setup_sshd_server(state, false);
return 0;
}
static int sshd_teardown(void **state) {
torture_teardown_sshd_server(state);
return 0;
}
static int session_setup(void **state)
{
struct torture_state *s = *state;
struct passwd *pwd;
int rc;
pwd = getpwnam("bob");
assert_non_null(pwd);
rc = setuid(pwd->pw_uid);
assert_return_code(rc, errno);
s->ssh.session = torture_ssh_session(s,
TORTURE_SSH_SERVER,
NULL,
TORTURE_SSH_USER_ALICE,
NULL);
assert_non_null(s->ssh.session);
return 0;
}
static int session_teardown(void **state)
{
struct torture_state *s = *state;
ssh_disconnect(s->ssh.session);
ssh_free(s->ssh.session);
return 0;
}
static void torture_request_pty_modes_translate_ocrnl(void **state)
{
const unsigned char modes[] = {
/* enable OCRNL */
73, 0, 0, 0, 1,
/* disable all other CR/NL handling */
34, 0, 0, 0, 0,
35, 0, 0, 0, 0,
36, 0, 0, 0, 0,
72, 0, 0, 0, 0,
74, 0, 0, 0, 0,
75, 0, 0, 0, 0,
0, /* TTY_OP_END */
};
struct torture_state *s = *state;
ssh_session session = s->ssh.session;
ssh_channel c;
char buffer[4096] = {0};
int nbytes;
int rc;
int string_found = 0;
c = ssh_channel_new(session);
assert_non_null(c);
rc = ssh_channel_open_session(c);
assert_ssh_return_code(session, rc);
rc = ssh_channel_request_pty_size_modes(c, "xterm", 80, 25, modes, sizeof(modes));
assert_ssh_return_code(session, rc);
rc = ssh_channel_request_exec(c, "echo -e '>TEST\\r\\n<'");
assert_ssh_return_code(session, rc);
nbytes = ssh_channel_read(c, buffer, sizeof(buffer) - 1, 0);
while (nbytes > 0) {
buffer[nbytes]='\0';
/* expect 2 newline characters */
if (strstr(buffer, ">TEST\n\n<") != NULL) {
string_found = 1;
break;
}
nbytes = ssh_channel_read(c, buffer, sizeof(buffer), 0);
}
assert_int_equal(string_found, 1);
ssh_channel_close(c);
}
int torture_run_tests(void) {
int rc;
struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(torture_request_pty_modes_translate_ocrnl,
session_setup,
session_teardown),
};
ssh_init();
torture_filter_tests(tests);
rc = cmocka_run_group_tests(tests, sshd_setup, sshd_teardown);
ssh_finalize();
return rc;
}