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https://github.com/opnsense/src.git
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317a38ab65
Some notable changes, from upstream's release notes: - sshd(8): Remove support for obsolete "host/port" syntax. - ssh(1): When prompting whether to record a new host key, accept the key fingerprint as a synonym for "yes". - ssh-keygen(1): when acting as a CA and signing certificates with an RSA key, default to using the rsa-sha2-512 signature algorithm. - ssh(1), sshd(8), ssh-keygen(1): this release removes the "ssh-rsa" (RSA/SHA1) algorithm from those accepted for certificate signatures. - ssh-sk-helper(8): this is a new binary. It is used by the FIDO/U2F support to provide address-space isolation for token middleware libraries (including the internal one). - ssh(1): this release enables UpdateHostkeys by default subject to some conservative preconditions. - scp(1): this release changes the behaviour of remote to remote copies (e.g. "scp host-a:/path host-b:") to transfer through the local host by default. - scp(1): experimental support for transfers using the SFTP protocol as a replacement for the venerable SCP/RCP protocol that it has traditionally used. Additional integration work is needed to support FIDO/U2F in the base system. Deprecation Notice ------------------ OpenSSH will disable the ssh-rsa signature scheme by default in the next release. Reviewed by: imp MFC after: 1 month Relnotes: Yes Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29985 (cherry picked from commit19261079b7) (cherry picked from commitf448c3ed4a) (cherry picked from commit1f290c707a) (cherry picked from commit0f9bafdfc3) (cherry picked from commitadb56e58e8) (cherry picked from commit576b58108c) (cherry picked from commit1c99af1ebe) (cherry picked from commit87152f3405) (cherry picked from commit172fa4aa75)
124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/*
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* Copyright 2010 Red Hat, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Red Hat author: Jan F. Chadima <jchadima@redhat.com>
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*/
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#include "includes.h"
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#if defined(USE_LINUX_AUDIT)
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#include <libaudit.h>
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#include <unistd.h>
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#include <string.h>
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#include "log.h"
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#include "audit.h"
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#include "canohost.h"
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#include "packet.h"
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const char *audit_username(void);
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int
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linux_audit_record_event(int uid, const char *username, const char *hostname,
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const char *ip, const char *ttyn, int success)
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{
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int audit_fd, rc, saved_errno;
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if ((audit_fd = audit_open()) < 0) {
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if (errno == EINVAL || errno == EPROTONOSUPPORT ||
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errno == EAFNOSUPPORT)
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return 1; /* No audit support in kernel */
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else
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return 0; /* Must prevent login */
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}
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rc = audit_log_acct_message(audit_fd, AUDIT_USER_LOGIN,
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NULL, "login", username ? username : "(unknown)",
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username == NULL ? uid : -1, hostname, ip, ttyn, success);
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saved_errno = errno;
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close(audit_fd);
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/*
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* Do not report error if the error is EPERM and sshd is run as non
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* root user.
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*/
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if ((rc == -EPERM) && (geteuid() != 0))
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rc = 0;
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errno = saved_errno;
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return rc >= 0;
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}
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/* Below is the sshd audit API code */
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void
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audit_connection_from(const char *host, int port)
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{
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/* not implemented */
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}
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void
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audit_run_command(const char *command)
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{
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/* not implemented */
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}
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void
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audit_session_open(struct logininfo *li)
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{
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if (linux_audit_record_event(li->uid, NULL, li->hostname, NULL,
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li->line, 1) == 0)
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fatal("linux_audit_write_entry failed: %s", strerror(errno));
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}
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void
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audit_session_close(struct logininfo *li)
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{
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/* not implemented */
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}
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void
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audit_event(struct ssh *ssh, ssh_audit_event_t event)
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{
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switch(event) {
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case SSH_AUTH_SUCCESS:
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case SSH_CONNECTION_CLOSE:
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case SSH_NOLOGIN:
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case SSH_LOGIN_EXCEED_MAXTRIES:
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case SSH_LOGIN_ROOT_DENIED:
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break;
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case SSH_AUTH_FAIL_NONE:
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case SSH_AUTH_FAIL_PASSWD:
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case SSH_AUTH_FAIL_KBDINT:
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case SSH_AUTH_FAIL_PUBKEY:
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case SSH_AUTH_FAIL_HOSTBASED:
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case SSH_AUTH_FAIL_GSSAPI:
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case SSH_INVALID_USER:
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linux_audit_record_event(-1, audit_username(), NULL,
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ssh_remote_ipaddr(ssh), "sshd", 0);
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break;
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default:
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debug("%s: unhandled event %d", __func__, event);
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break;
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}
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}
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#endif /* USE_LINUX_AUDIT */
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