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/*
*
* Copyright (c) 2001 Gert Doering. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "includes.h"
#include "auth.h"
#include "ssh.h"
#include "log.h"
#include "servconf.h"
#include "canohost.h"
#include "xmalloc.h"
#include "buffer.h"
#ifdef _AIX
#include <uinfo.h>
#include "port-aix.h"
extern ServerOptions options;
extern Buffer loginmsg;
# ifdef HAVE_SETAUTHDB
static char old_registry[REGISTRY_SIZE] = "";
# endif
/*
* AIX has a "usrinfo" area where logname and other stuff is stored -
* a few applications actually use this and die if it's not set
*
* NOTE: TTY= should be set, but since no one uses it and it's hard to
* acquire due to privsep code. We will just drop support.
*/
void
aix_usrinfo(struct passwd *pw)
{
u_int i;
size_t len;
char *cp;
len = sizeof("LOGNAME= NAME= ") + (2 * strlen(pw->pw_name));
cp = xmalloc(len);
i = snprintf(cp, len, "LOGNAME=%s%cNAME=%s%c", pw->pw_name, '\0',
pw->pw_name, '\0');
if (usrinfo(SETUINFO, cp, i) == -1)
fatal("Couldn't set usrinfo: %s", strerror(errno));
debug3("AIX/UsrInfo: set len %d", i);
xfree(cp);
}
# ifdef WITH_AIXAUTHENTICATE
/*
* Remove embedded newlines in string (if any).
* Used before logging messages returned by AIX authentication functions
* so the message is logged on one line.
*/
void
aix_remove_embedded_newlines(char *p)
{
if (p == NULL)
return;
for (; *p; p++) {
if (*p == '\n')
*p = ' ';
}
/* Remove trailing whitespace */
if (*--p == ' ')
*p = '\0';
}
/*
* Do authentication via AIX's authenticate routine. We loop until the
* reenter parameter is 0, but normally authenticate is called only once.
*
* Note: this function returns 1 on success, whereas AIX's authenticate()
* returns 0.
*/
int
sys_auth_passwd(Authctxt *ctxt, const char *password)
{
char *authmsg = NULL, *host, *msg, *name = ctxt->pw->pw_name;
int authsuccess = 0, expired, reenter, result;
do {
result = authenticate((char *)name, (char *)password, &reenter,
&authmsg);
aix_remove_embedded_newlines(authmsg);
debug3("AIX/authenticate result %d, msg %.100s", result,
authmsg);
} while (reenter);
if (result == 0) {
authsuccess = 1;
host = (char *)get_canonical_hostname(options.use_dns);
/*
* Record successful login. We don't have a pty yet, so just
* label the line as "ssh"
*/
aix_setauthdb(name);
if (loginsuccess((char *)name, (char *)host, "ssh", &msg) == 0) {
if (msg != NULL) {
debug("%s: msg %s", __func__, msg);
buffer_append(&loginmsg, msg, strlen(msg));
xfree(msg);
}
}
/*
* Check if the user's password is expired.
*/
expired = passwdexpired(name, &msg);
if (msg && *msg) {
buffer_append(&loginmsg, msg, strlen(msg));
aix_remove_embedded_newlines(msg);
}
debug3("AIX/passwdexpired returned %d msg %.100s", expired, msg);
switch (expired) {
case 0: /* password not expired */
break;
case 1: /* expired, password change required */
ctxt->force_pwchange = 1;
disable_forwarding();
break;
default: /* user can't change(2) or other error (-1) */
logit("Password can't be changed for user %s: %.100s",
name, msg);
if (msg)
xfree(msg);
authsuccess = 0;
}
aix_restoreauthdb();
}
if (authmsg != NULL)
xfree(authmsg);
return authsuccess;
}
# ifdef CUSTOM_FAILED_LOGIN
/*
* record_failed_login: generic "login failed" interface function
*/
void
record_failed_login(const char *user, const char *ttyname)
{
char *hostname = (char *)get_canonical_hostname(options.use_dns);
if (geteuid() != 0)
return;
aix_setauthdb(user);
# ifdef AIX_LOGINFAILED_4ARG
loginfailed((char *)user, hostname, (char *)ttyname, AUDIT_FAIL_AUTH);
# else
loginfailed((char *)user, hostname, (char *)ttyname);
# endif
aix_restoreauthdb();
}
# endif /* CUSTOM_FAILED_LOGIN */
/*
* If we have setauthdb, retrieve the password registry for the user's
* account then feed it to setauthdb. This will mean that subsequent AIX auth
* functions will only use the specified loadable module. If we don't have
* setauthdb this is a no-op.
*/
void
aix_setauthdb(const char *user)
{
# ifdef HAVE_SETAUTHDB
char *registry;
if (setuserdb(S_READ) == -1) {
debug3("%s: Could not open userdb to read", __func__);
return;
}
if (getuserattr((char *)user, S_REGISTRY, ®istry, SEC_CHAR) == 0) {
if (setauthdb(registry, old_registry) == 0)
debug3("AIX/setauthdb set registry '%s'", registry);
else
debug3("AIX/setauthdb set registry '%s' failed: %s",
registry, strerror(errno));
} else
debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
strerror(errno));
enduserdb();
# endif /* HAVE_SETAUTHDB */
}
/*
* Restore the user's registry settings from old_registry.
* Note that if the first aix_setauthdb fails, setauthdb("") is still safe
* (it restores the system default behaviour). If we don't have setauthdb,
* this is a no-op.
*/
void
aix_restoreauthdb(void)
{
# ifdef HAVE_SETAUTHDB
if (setauthdb(old_registry, NULL) == 0)
debug3("%s: restoring old registry '%s'", __func__,
old_registry);
else
debug3("%s: failed to restore old registry %s", __func__,
old_registry);
# endif /* HAVE_SETAUTHDB */
}
# endif /* WITH_AIXAUTHENTICATE */
#endif /* _AIX */
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