[openssh.git] / openbsd-compat / port-aix.c

/*
 *
 * Copyright (c) 2001 Gert Doering.  All rights reserved.
 * Copyright (c) 2003,2004,2005 Darren Tucker.  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 "xmalloc.h"
#include "buffer.h"

#ifdef _AIX

#include <errno.h>
#if defined(HAVE_NETDB_H)
# include <netdb.h>
#endif
#include <uinfo.h>
#include <sys/socket.h>
#include "port-aix.h"

# 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';
}

/*
 * Test specifically for the case where SYSTEM == NONE and AUTH1 contains
 * anything other than NONE or SYSTEM, which indicates that the admin has
 * configured the account for purely AUTH1-type authentication.
 *
 * Since authenticate() doesn't check AUTH1, and sshd can't sanely support
 * AUTH1 itself, in such a case authenticate() will allow access without
 * authentation, which is almost certainly not what the admin intends.
 *
 * (The native tools, eg login, will process the AUTH1 list in addition to
 * the SYSTEM list by using ckuserID(), however ckuserID() and AUTH1 methods
 * have been deprecated since AIX 4.2.x and would be very difficult for sshd
 * to support.
 *
 * Returns 0 if an unsupportable combination is found, 1 otherwise.
 */
static int
aix_valid_authentications(const char *user)
{
	char *auth1, *sys, *p;
	int valid = 1;

	if (getuserattr((char *)user, S_AUTHSYSTEM, &sys, SEC_CHAR) != 0) {
		logit("Can't retrieve attribute SYSTEM for %s: %.100s",
		    user, strerror(errno));
		return 0;
	}

	debug3("AIX SYSTEM attribute %s", sys);
	if (strcmp(sys, "NONE") != 0)
		return 1;	/* not "NONE", so is OK */

	if (getuserattr((char *)user, S_AUTH1, &auth1, SEC_LIST) != 0) {
		logit("Can't retrieve attribute auth1 for %s: %.100s",
		    user, strerror(errno));
		return 0;
	}

	p = auth1;
	/* A SEC_LIST is concatenated strings, ending with two NULs. */
	while (p[0] != '\0' && p[1] != '\0') {
		debug3("AIX auth1 attribute list member %s", p);
		if (strcmp(p, "NONE") != 0 && strcmp(p, "SYSTEM")) {
			logit("Account %s has unsupported auth1 value '%s'",
			    user, p);
			valid = 0;
		}
		p += strlen(p) + 1;
	}

	return (valid);
}

/*
 * 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, *msg = NULL, *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, authmsg %.100s", result,
		    authmsg);
	} while (reenter);

	if (!aix_valid_authentications(name))
		result = -1;

	if (result == 0) {
		authsuccess = 1;

		/*
		 * Record successful login.  We don't have a pty yet, so just
		 * label the line as "ssh"
		 */
		aix_setauthdb(name);

		/*
		 * Check if the user's password is expired.
		 */
		expired = passwdexpired(name, &msg);
		if (msg && *msg) {
			buffer_append(ctxt->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;
			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;
}

/*
 * Check if specified account is permitted to log in.
 * Returns 1 if login is allowed, 0 if not allowed.
 */
int
sys_auth_allowed_user(struct passwd *pw, Buffer *loginmsg)
{
	char *msg = NULL;
	int result, permitted = 0;
	struct stat st;

	/*
	 * Don't perform checks for root account (PermitRootLogin controls
	 * logins via * ssh) or if running as non-root user (since
	 * loginrestrictions will always fail due to insufficient privilege).
	 */
	if (pw->pw_uid == 0 || geteuid() != 0) {
		debug3("%s: not checking", __func__);
		return 1;
	}

	result = loginrestrictions(pw->pw_name, S_RLOGIN, NULL, &msg);
	if (result == 0)
		permitted = 1;
	/*
	 * If restricted because /etc/nologin exists, the login will be denied
	 * in session.c after the nologin message is sent, so allow for now
	 * and do not append the returned message.
	 */
	if (result == -1 && errno == EPERM && stat(_PATH_NOLOGIN, &st) == 0)
		permitted = 1;
	else if (msg != NULL)
		buffer_append(loginmsg, msg, strlen(msg));
	if (msg == NULL)
		msg = xstrdup("(none)");
	aix_remove_embedded_newlines(msg);
	debug3("AIX/loginrestrictions returned %d msg %.100s", result, msg);

	if (!permitted)
		logit("Login restricted for %s: %.100s", pw->pw_name, msg);
	xfree(msg);
	return permitted;
}

int
sys_auth_record_login(const char *user, const char *host, const char *ttynm,
    Buffer *loginmsg)
{
	char *msg = NULL;
	int success = 0;

	aix_setauthdb(user);
	if (loginsuccess((char *)user, (char *)host, (char *)ttynm, &msg) == 0) {
		success = 1;
		if (msg != NULL) {
			debug("AIX/loginsuccess: msg %s", msg);
			buffer_append(loginmsg, msg, strlen(msg));
			xfree(msg);
		}
	}
	aix_restoreauthdb();
	return (success);
}

#  ifdef CUSTOM_FAILED_LOGIN
/*
 * record_failed_login: generic "login failed" interface function
 */
void
record_failed_login(const char *user, const char *hostname, const char *ttyname)
{
	if (geteuid() != 0)
		return;

	aix_setauthdb(user);
#   ifdef AIX_LOGINFAILED_4ARG
	loginfailed((char *)user, (char *)hostname, (char *)ttyname,
	    AUDIT_FAIL_AUTH);
#   else
	loginfailed((char *)user, (char *)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, &registry, 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 */

# if defined(AIX_GETNAMEINFO_HACK) && !defined(BROKEN_ADDRINFO)
# undef getnameinfo
/*
 * For some reason, AIX's getnameinfo will refuse to resolve the all-zeros
 * IPv6 address into its textual representation ("::"), so we wrap it
 * with a function that will.
 */
int
sshaix_getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
    size_t hostlen, char *serv, size_t servlen, int flags)
{
	struct sockaddr_in6 *sa6;
	u_int32_t *a6;

	if (flags & (NI_NUMERICHOST|NI_NUMERICSERV) &&
	    sa->sa_family == AF_INET6) {
		sa6 = (struct sockaddr_in6 *)sa;
		a6 = sa6->sin6_addr.u6_addr.u6_addr32;

		if (a6[0] == 0 && a6[1] == 0 && a6[2] == 0 && a6[3] == 0) {
			strlcpy(host, "::", hostlen);
			snprintf(serv, servlen, "%d", sa6->sin6_port);
			return 0;
		}
	}
	return getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
}
# endif /* AIX_GETNAMEINFO_HACK */

#endif /* _AIX */
Commit	Line	Data
0ba40daa	1	/*
34a88012	2	*
34a88012	3	* Copyright (c) 2001 Gert Doering. All rights reserved.
c8ed2130	4	* Copyright (c) 2003,2004,2005 Darren Tucker. All rights reserved.
34a88012	5	*
0ba40daa	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	16	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	17	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	18	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	19	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	20	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	21	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	22	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	23	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	24	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	25	*
	26	*/
90e70cfc	27	#include "includes.h"
262b1744	28	#include "auth.h"
73d9dad3	29	#include "ssh.h"
73d9dad3	30	#include "log.h"
805dcf3a	31	#include "xmalloc.h"
f0b467ef	32	#include "buffer.h"
90e70cfc	33
	34	#ifdef _AIX
	35
4f4b7d4d	36	#include <errno.h>
c8dfff33	37	#if defined(HAVE_NETDB_H)
	38	# include <netdb.h>
	39	#endif
90e70cfc	40	#include <uinfo.h>
5ccf88cb	41	#include <sys/socket.h>
2aa3a16c	42	#include "port-aix.h"
90e70cfc	43
d852ad8b	44	# ifdef HAVE_SETAUTHDB
	45	static char old_registry[REGISTRY_SIZE] = "";
	46	# endif
	47
90e70cfc	48	/*
5700232d	49	* AIX has a "usrinfo" area where logname and other stuff is stored -
0ba40daa	50	* a few applications actually use this and die if it's not set
	51	*
	52	* NOTE: TTY= should be set, but since no one uses it and it's hard to
	53	* acquire due to privsep code. We will just drop support.
90e70cfc	54	*/
90e70cfc	55	void
0ba40daa	56	aix_usrinfo(struct passwd *pw)
90e70cfc	57	{
90e70cfc	58	u_int i;
9901cb37	59	size_t len;
0ba40daa	60	char *cp;
90e70cfc	61
9901cb37	62	len = sizeof("LOGNAME= NAME= ") + (2 * strlen(pw->pw_name));
	63	cp = xmalloc(len);
	64
5700232d	65	i = snprintf(cp, len, "LOGNAME=%s%cNAME=%s%c", pw->pw_name, '\0',
1e72a7e3	66	pw->pw_name, '\0');
90e70cfc	67	if (usrinfo(SETUINFO, cp, i) == -1)
	68	fatal("Couldn't set usrinfo: %s", strerror(errno));
	69	debug3("AIX/UsrInfo: set len %d", i);
9901cb37	70
90e70cfc	71	xfree(cp);
	72	}
	73
f0b467ef	74	# ifdef WITH_AIXAUTHENTICATE
bc7dfc06	75	/*
	76	* Remove embedded newlines in string (if any).
	77	* Used before logging messages returned by AIX authentication functions
	78	* so the message is logged on one line.
	79	*/
	80	void
	81	aix_remove_embedded_newlines(char *p)
	82	{
	83	if (p == NULL)
	84	return;
	85
	86	for (; *p; p++) {
	87	if (*p == '\n')
	88	*p = ' ';
	89	}
	90	/* Remove trailing whitespace */
	91	if (*--p == ' ')
	92	*p = '\0';
	93	}
f0b467ef	94
1383f285	95	/*
	96	* Test specifically for the case where SYSTEM == NONE and AUTH1 contains
	97	* anything other than NONE or SYSTEM, which indicates that the admin has
	98	* configured the account for purely AUTH1-type authentication.
	99	*
	100	* Since authenticate() doesn't check AUTH1, and sshd can't sanely support
	101	* AUTH1 itself, in such a case authenticate() will allow access without
	102	* authentation, which is almost certainly not what the admin intends.
	103	*
	104	* (The native tools, eg login, will process the AUTH1 list in addition to
	105	* the SYSTEM list by using ckuserID(), however ckuserID() and AUTH1 methods
	106	* have been deprecated since AIX 4.2.x and would be very difficult for sshd
	107	* to support.
	108	*
	109	* Returns 0 if an unsupportable combination is found, 1 otherwise.
	110	*/
	111	static int
	112	aix_valid_authentications(const char *user)
	113	{
	114	char auth1, sys, *p;
	115	int valid = 1;
	116
	117	if (getuserattr((char *)user, S_AUTHSYSTEM, &sys, SEC_CHAR) != 0) {
	118	logit("Can't retrieve attribute SYSTEM for %s: %.100s",
	119	user, strerror(errno));
	120	return 0;
	121	}
	122
	123	debug3("AIX SYSTEM attribute %s", sys);
	124	if (strcmp(sys, "NONE") != 0)
	125	return 1; /* not "NONE", so is OK */
	126
	127	if (getuserattr((char *)user, S_AUTH1, &auth1, SEC_LIST) != 0) {
	128	logit("Can't retrieve attribute auth1 for %s: %.100s",
	129	user, strerror(errno));
	130	return 0;
	131	}
	132
	133	p = auth1;
	134	/* A SEC_LIST is concatenated strings, ending with two NULs. */
	135	while (p[0] != '\0' && p[1] != '\0') {
	136	debug3("AIX auth1 attribute list member %s", p);
	137	if (strcmp(p, "NONE") != 0 && strcmp(p, "SYSTEM")) {
	138	logit("Account %s has unsupported auth1 value '%s'",
	139	user, p);
	140	valid = 0;
	141	}
	142	p += strlen(p) + 1;
	143	}
	144
	145	return (valid);
	146	}
	147
f0b467ef	148	/*
	149	* Do authentication via AIX's authenticate routine. We loop until the
	150	* reenter parameter is 0, but normally authenticate is called only once.
	151	*
	152	* Note: this function returns 1 on success, whereas AIX's authenticate()
	153	* returns 0.
	154	*/
	155	int
1b394137	156	sys_auth_passwd(Authctxt ctxt, const char password)
f0b467ef	157	{
c8ed2130	158	char authmsg = NULL, msg = NULL, *name = ctxt->pw->pw_name;
cadfc759	159	int authsuccess = 0, expired, reenter, result;
f0b467ef	160
	161	do {
	162	result = authenticate((char )name, (char )password, &reenter,
	163	&authmsg);
	164	aix_remove_embedded_newlines(authmsg);
ec7f28f2	165	debug3("AIX/authenticate result %d, authmsg %.100s", result,
f0b467ef	166	authmsg);
	167	} while (reenter);
	168
1383f285	169	if (!aix_valid_authentications(name))
	170	result = -1;
	171
f0b467ef	172	if (result == 0) {
	173	authsuccess = 1;
	174
5700232d	175	/*
cadfc759	176	* Record successful login. We don't have a pty yet, so just
	177	* label the line as "ssh"
	178	*/
f0b467ef	179	aix_setauthdb(name);
cadfc759	180
	181	/*
	182	* Check if the user's password is expired.
	183	*/
6d05637a	184	expired = passwdexpired(name, &msg);
6d05637a	185	if (msg && *msg) {
1b394137	186	buffer_append(ctxt->loginmsg, msg, strlen(msg));
6d05637a	187	aix_remove_embedded_newlines(msg);
	188	}
	189	debug3("AIX/passwdexpired returned %d msg %.100s", expired, msg);
cadfc759	190
	191	switch (expired) {
	192	case 0: /* password not expired */
	193	break;
	194	case 1: /* expired, password change required */
	195	ctxt->force_pwchange = 1;
cadfc759	196	break;
	197	default: /* user can't change(2) or other error (-1) */
	198	logit("Password can't be changed for user %s: %.100s",
	199	name, msg);
	200	if (msg)
	201	xfree(msg);
	202	authsuccess = 0;
	203	}
	204
d852ad8b	205	aix_restoreauthdb();
f0b467ef	206	}
	207
	208	if (authmsg != NULL)
	209	xfree(authmsg);
	210
	211	return authsuccess;
	212	}
bc5c2025	213
	214	/*
	215	* Check if specified account is permitted to log in.
	216	* Returns 1 if login is allowed, 0 if not allowed.
	217	*/
	218	int
5ccf88cb	219	sys_auth_allowed_user(struct passwd pw, Buffer loginmsg)
bc5c2025	220	{
	221	char *msg = NULL;
	222	int result, permitted = 0;
	223	struct stat st;
	224
	225	/*
	226	* Don't perform checks for root account (PermitRootLogin controls
	227	* logins via * ssh) or if running as non-root user (since
	228	* loginrestrictions will always fail due to insufficient privilege).
	229	*/
	230	if (pw->pw_uid == 0 \|\| geteuid() != 0) {
13f72b91	231	debug3("%s: not checking", __func__);
bc5c2025	232	return 1;
	233	}
	234
	235	result = loginrestrictions(pw->pw_name, S_RLOGIN, NULL, &msg);
	236	if (result == 0)
	237	permitted = 1;
	238	/*
	239	* If restricted because /etc/nologin exists, the login will be denied
	240	* in session.c after the nologin message is sent, so allow for now
	241	* and do not append the returned message.
	242	*/
	243	if (result == -1 && errno == EPERM && stat(_PATH_NOLOGIN, &st) == 0)
	244	permitted = 1;
	245	else if (msg != NULL)
5ccf88cb	246	buffer_append(loginmsg, msg, strlen(msg));
bc5c2025	247	if (msg == NULL)
	248	msg = xstrdup("(none)");
	249	aix_remove_embedded_newlines(msg);
	250	debug3("AIX/loginrestrictions returned %d msg %.100s", result, msg);
	251
	252	if (!permitted)
	253	logit("Login restricted for %s: %.100s", pw->pw_name, msg);
	254	xfree(msg);
	255	return permitted;
	256	}
	257
f5ed3301	258	int
5ccf88cb	259	sys_auth_record_login(const char user, const char host, const char *ttynm,
5ccf88cb	260	Buffer *loginmsg)
f5ed3301	261	{
c8ed2130	262	char *msg = NULL;
f5ed3301	263	int success = 0;
	264
	265	aix_setauthdb(user);
c2edf154	266	if (loginsuccess((char )user, (char )host, (char *)ttynm, &msg) == 0) {
f5ed3301	267	success = 1;
f5ed3301	268	if (msg != NULL) {
c2edf154	269	debug("AIX/loginsuccess: msg %s", msg);
5ccf88cb	270	buffer_append(loginmsg, msg, strlen(msg));
f5ed3301	271	xfree(msg);
	272	}
	273	}
	274	aix_restoreauthdb();
	275	return (success);
	276	}
	277
f0b467ef	278	# ifdef CUSTOM_FAILED_LOGIN
73d9dad3	279	/*
	280	* record_failed_login: generic "login failed" interface function
	281	*/
	282	void
575e336f	283	record_failed_login(const char user, const char hostname, const char *ttyname)
73d9dad3	284	{
2aa3a16c	285	if (geteuid() != 0)
	286	return;
	287
	288	aix_setauthdb(user);
f0b467ef	289	# ifdef AIX_LOGINFAILED_4ARG
c2edf154	290	loginfailed((char )user, (char )hostname, (char *)ttyname,
c2edf154	291	AUDIT_FAIL_AUTH);
f0b467ef	292	# else
c2edf154	293	loginfailed((char )user, (char )hostname, (char *)ttyname);
f0b467ef	294	# endif
d852ad8b	295	aix_restoreauthdb();
73d9dad3	296	}
f0b467ef	297	# endif /* CUSTOM_FAILED_LOGIN */
2aa3a16c	298
	299	/*
	300	* If we have setauthdb, retrieve the password registry for the user's
d852ad8b	301	* account then feed it to setauthdb. This will mean that subsequent AIX auth
	302	* functions will only use the specified loadable module. If we don't have
	303	* setauthdb this is a no-op.
2aa3a16c	304	*/
	305	void
	306	aix_setauthdb(const char *user)
	307	{
	308	# ifdef HAVE_SETAUTHDB
d852ad8b	309	char *registry;
2aa3a16c	310
	311	if (setuserdb(S_READ) == -1) {
	312	debug3("%s: Could not open userdb to read", __func__);
	313	return;
	314	}
	315
	316	if (getuserattr((char *)user, S_REGISTRY, &registry, SEC_CHAR) == 0) {
d852ad8b	317	if (setauthdb(registry, old_registry) == 0)
d852ad8b	318	debug3("AIX/setauthdb set registry '%s'", registry);
2aa3a16c	319	else
d852ad8b	320	debug3("AIX/setauthdb set registry '%s' failed: %s",
d852ad8b	321	registry, strerror(errno));
2aa3a16c	322	} else
	323	debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
	324	strerror(errno));
	325	enduserdb();
f0b467ef	326	# endif /* HAVE_SETAUTHDB */
2aa3a16c	327	}
90e70cfc	328
d852ad8b	329	/*
	330	* Restore the user's registry settings from old_registry.
	331	* Note that if the first aix_setauthdb fails, setauthdb("") is still safe
	332	* (it restores the system default behaviour). If we don't have setauthdb,
	333	* this is a no-op.
	334	*/
	335	void
	336	aix_restoreauthdb(void)
	337	{
	338	# ifdef HAVE_SETAUTHDB
	339	if (setauthdb(old_registry, NULL) == 0)
	340	debug3("%s: restoring old registry '%s'", __func__,
	341	old_registry);
	342	else
	343	debug3("%s: failed to restore old registry %s", __func__,
	344	old_registry);
	345	# endif /* HAVE_SETAUTHDB */
	346	}
	347
f0b467ef	348	# endif /* WITH_AIXAUTHENTICATE */
f0b467ef	349
5ccf88cb	350	# if defined(AIX_GETNAMEINFO_HACK) && !defined(BROKEN_ADDRINFO)
	351	# undef getnameinfo
	352	/*
	353	* For some reason, AIX's getnameinfo will refuse to resolve the all-zeros
	354	* IPv6 address into its textual representation ("::"), so we wrap it
	355	* with a function that will.
	356	*/
	357	int
	358	sshaix_getnameinfo(const struct sockaddr sa, size_t salen, char host,
	359	size_t hostlen, char *serv, size_t servlen, int flags)
	360	{
	361	struct sockaddr_in6 *sa6;
	362	u_int32_t *a6;
	363
	364	if (flags & (NI_NUMERICHOST\|NI_NUMERICSERV) &&
	365	sa->sa_family == AF_INET6) {
	366	sa6 = (struct sockaddr_in6 *)sa;
	367	a6 = sa6->sin6_addr.u6_addr.u6_addr32;
	368
	369	if (a6[0] == 0 && a6[1] == 0 && a6[2] == 0 && a6[3] == 0) {
	370	strlcpy(host, "::", hostlen);
	371	snprintf(serv, servlen, "%d", sa6->sin6_port);
	372	return 0;
	373	}
	374	}
	375	return getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
	376	}
	377	# endif /* AIX_GETNAMEINFO_HACK */
	378
f0b467ef	379	#endif /* _AIX */