[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 "xmalloc.h"
#include "buffer.h"
#include "key.h"
#include "hostfile.h"
#include "auth.h"
#include "ssh.h"
#include "log.h"

#ifdef _AIX

#include <errno.h>
#if defined(HAVE_NETDB_H)
# include <netdb.h>
#endif
#include <uinfo.h>
#include <string.h>
#include <unistd.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"
31652869	28
	29	#include "xmalloc.h"
	30	#include "buffer.h"
	31	#include "key.h"
	32	#include "hostfile.h"
262b1744	33	#include "auth.h"
73d9dad3	34	#include "ssh.h"
73d9dad3	35	#include "log.h"
90e70cfc	36
	37	#ifdef _AIX
	38
4f4b7d4d	39	#include <errno.h>
c8dfff33	40	#if defined(HAVE_NETDB_H)
	41	# include <netdb.h>
	42	#endif
90e70cfc	43	#include <uinfo.h>
e204f3ee	44	#include <string.h>
e204f3ee	45	#include <unistd.h>
5ccf88cb	46	#include <sys/socket.h>
2aa3a16c	47	#include "port-aix.h"
90e70cfc	48
d852ad8b	49	# ifdef HAVE_SETAUTHDB
	50	static char old_registry[REGISTRY_SIZE] = "";
	51	# endif
	52
90e70cfc	53	/*
5700232d	54	* AIX has a "usrinfo" area where logname and other stuff is stored -
0ba40daa	55	* a few applications actually use this and die if it's not set
	56	*
	57	* NOTE: TTY= should be set, but since no one uses it and it's hard to
	58	* acquire due to privsep code. We will just drop support.
90e70cfc	59	*/
90e70cfc	60	void
0ba40daa	61	aix_usrinfo(struct passwd *pw)
90e70cfc	62	{
90e70cfc	63	u_int i;
9901cb37	64	size_t len;
0ba40daa	65	char *cp;
90e70cfc	66
9901cb37	67	len = sizeof("LOGNAME= NAME= ") + (2 * strlen(pw->pw_name));
	68	cp = xmalloc(len);
	69
5700232d	70	i = snprintf(cp, len, "LOGNAME=%s%cNAME=%s%c", pw->pw_name, '\0',
1e72a7e3	71	pw->pw_name, '\0');
90e70cfc	72	if (usrinfo(SETUINFO, cp, i) == -1)
	73	fatal("Couldn't set usrinfo: %s", strerror(errno));
	74	debug3("AIX/UsrInfo: set len %d", i);
9901cb37	75
90e70cfc	76	xfree(cp);
	77	}
	78
f0b467ef	79	# ifdef WITH_AIXAUTHENTICATE
bc7dfc06	80	/*
	81	* Remove embedded newlines in string (if any).
	82	* Used before logging messages returned by AIX authentication functions
	83	* so the message is logged on one line.
	84	*/
	85	void
	86	aix_remove_embedded_newlines(char *p)
	87	{
	88	if (p == NULL)
	89	return;
	90
	91	for (; *p; p++) {
	92	if (*p == '\n')
	93	*p = ' ';
	94	}
	95	/* Remove trailing whitespace */
	96	if (*--p == ' ')
	97	*p = '\0';
	98	}
f0b467ef	99
1383f285	100	/*
	101	* Test specifically for the case where SYSTEM == NONE and AUTH1 contains
	102	* anything other than NONE or SYSTEM, which indicates that the admin has
	103	* configured the account for purely AUTH1-type authentication.
	104	*
	105	* Since authenticate() doesn't check AUTH1, and sshd can't sanely support
	106	* AUTH1 itself, in such a case authenticate() will allow access without
	107	* authentation, which is almost certainly not what the admin intends.
	108	*
	109	* (The native tools, eg login, will process the AUTH1 list in addition to
	110	* the SYSTEM list by using ckuserID(), however ckuserID() and AUTH1 methods
	111	* have been deprecated since AIX 4.2.x and would be very difficult for sshd
	112	* to support.
	113	*
	114	* Returns 0 if an unsupportable combination is found, 1 otherwise.
	115	*/
	116	static int
	117	aix_valid_authentications(const char *user)
	118	{
	119	char auth1, sys, *p;
	120	int valid = 1;
	121
	122	if (getuserattr((char *)user, S_AUTHSYSTEM, &sys, SEC_CHAR) != 0) {
	123	logit("Can't retrieve attribute SYSTEM for %s: %.100s",
	124	user, strerror(errno));
	125	return 0;
	126	}
	127
	128	debug3("AIX SYSTEM attribute %s", sys);
	129	if (strcmp(sys, "NONE") != 0)
	130	return 1; /* not "NONE", so is OK */
	131
	132	if (getuserattr((char *)user, S_AUTH1, &auth1, SEC_LIST) != 0) {
	133	logit("Can't retrieve attribute auth1 for %s: %.100s",
	134	user, strerror(errno));
	135	return 0;
	136	}
	137
	138	p = auth1;
	139	/* A SEC_LIST is concatenated strings, ending with two NULs. */
	140	while (p[0] != '\0' && p[1] != '\0') {
	141	debug3("AIX auth1 attribute list member %s", p);
	142	if (strcmp(p, "NONE") != 0 && strcmp(p, "SYSTEM")) {
	143	logit("Account %s has unsupported auth1 value '%s'",
	144	user, p);
	145	valid = 0;
	146	}
	147	p += strlen(p) + 1;
	148	}
	149
	150	return (valid);
	151	}
	152
f0b467ef	153	/*
	154	* Do authentication via AIX's authenticate routine. We loop until the
	155	* reenter parameter is 0, but normally authenticate is called only once.
	156	*
	157	* Note: this function returns 1 on success, whereas AIX's authenticate()
	158	* returns 0.
	159	*/
	160	int
1b394137	161	sys_auth_passwd(Authctxt ctxt, const char password)
f0b467ef	162	{
c8ed2130	163	char authmsg = NULL, msg = NULL, *name = ctxt->pw->pw_name;
cadfc759	164	int authsuccess = 0, expired, reenter, result;
f0b467ef	165
	166	do {
	167	result = authenticate((char )name, (char )password, &reenter,
	168	&authmsg);
	169	aix_remove_embedded_newlines(authmsg);
ec7f28f2	170	debug3("AIX/authenticate result %d, authmsg %.100s", result,
f0b467ef	171	authmsg);
	172	} while (reenter);
	173
1383f285	174	if (!aix_valid_authentications(name))
	175	result = -1;
	176
f0b467ef	177	if (result == 0) {
	178	authsuccess = 1;
	179
5700232d	180	/*
cadfc759	181	* Record successful login. We don't have a pty yet, so just
	182	* label the line as "ssh"
	183	*/
f0b467ef	184	aix_setauthdb(name);
cadfc759	185
	186	/*
	187	* Check if the user's password is expired.
	188	*/
6d05637a	189	expired = passwdexpired(name, &msg);
6d05637a	190	if (msg && *msg) {
1b394137	191	buffer_append(ctxt->loginmsg, msg, strlen(msg));
6d05637a	192	aix_remove_embedded_newlines(msg);
	193	}
	194	debug3("AIX/passwdexpired returned %d msg %.100s", expired, msg);
cadfc759	195
	196	switch (expired) {
	197	case 0: /* password not expired */
	198	break;
	199	case 1: /* expired, password change required */
	200	ctxt->force_pwchange = 1;
cadfc759	201	break;
	202	default: /* user can't change(2) or other error (-1) */
	203	logit("Password can't be changed for user %s: %.100s",
	204	name, msg);
	205	if (msg)
	206	xfree(msg);
	207	authsuccess = 0;
	208	}
	209
d852ad8b	210	aix_restoreauthdb();
f0b467ef	211	}
	212
	213	if (authmsg != NULL)
	214	xfree(authmsg);
	215
	216	return authsuccess;
	217	}
bc5c2025	218
	219	/*
	220	* Check if specified account is permitted to log in.
	221	* Returns 1 if login is allowed, 0 if not allowed.
	222	*/
	223	int
5ccf88cb	224	sys_auth_allowed_user(struct passwd pw, Buffer loginmsg)
bc5c2025	225	{
	226	char *msg = NULL;
	227	int result, permitted = 0;
	228	struct stat st;
	229
	230	/*
	231	* Don't perform checks for root account (PermitRootLogin controls
	232	* logins via * ssh) or if running as non-root user (since
	233	* loginrestrictions will always fail due to insufficient privilege).
	234	*/
	235	if (pw->pw_uid == 0 \|\| geteuid() != 0) {
13f72b91	236	debug3("%s: not checking", __func__);
bc5c2025	237	return 1;
	238	}
	239
	240	result = loginrestrictions(pw->pw_name, S_RLOGIN, NULL, &msg);
	241	if (result == 0)
	242	permitted = 1;
	243	/*
	244	* If restricted because /etc/nologin exists, the login will be denied
	245	* in session.c after the nologin message is sent, so allow for now
	246	* and do not append the returned message.
	247	*/
	248	if (result == -1 && errno == EPERM && stat(_PATH_NOLOGIN, &st) == 0)
	249	permitted = 1;
	250	else if (msg != NULL)
5ccf88cb	251	buffer_append(loginmsg, msg, strlen(msg));
bc5c2025	252	if (msg == NULL)
	253	msg = xstrdup("(none)");
	254	aix_remove_embedded_newlines(msg);
	255	debug3("AIX/loginrestrictions returned %d msg %.100s", result, msg);
	256
	257	if (!permitted)
	258	logit("Login restricted for %s: %.100s", pw->pw_name, msg);
	259	xfree(msg);
	260	return permitted;
	261	}
	262
f5ed3301	263	int
5ccf88cb	264	sys_auth_record_login(const char user, const char host, const char *ttynm,
5ccf88cb	265	Buffer *loginmsg)
f5ed3301	266	{
c8ed2130	267	char *msg = NULL;
f5ed3301	268	int success = 0;
	269
	270	aix_setauthdb(user);
c2edf154	271	if (loginsuccess((char )user, (char )host, (char *)ttynm, &msg) == 0) {
f5ed3301	272	success = 1;
f5ed3301	273	if (msg != NULL) {
c2edf154	274	debug("AIX/loginsuccess: msg %s", msg);
5ccf88cb	275	buffer_append(loginmsg, msg, strlen(msg));
f5ed3301	276	xfree(msg);
	277	}
	278	}
	279	aix_restoreauthdb();
	280	return (success);
	281	}
	282
f0b467ef	283	# ifdef CUSTOM_FAILED_LOGIN
73d9dad3	284	/*
	285	* record_failed_login: generic "login failed" interface function
	286	*/
	287	void
575e336f	288	record_failed_login(const char user, const char hostname, const char *ttyname)
73d9dad3	289	{
2aa3a16c	290	if (geteuid() != 0)
	291	return;
	292
	293	aix_setauthdb(user);
f0b467ef	294	# ifdef AIX_LOGINFAILED_4ARG
c2edf154	295	loginfailed((char )user, (char )hostname, (char *)ttyname,
c2edf154	296	AUDIT_FAIL_AUTH);
f0b467ef	297	# else
c2edf154	298	loginfailed((char )user, (char )hostname, (char *)ttyname);
f0b467ef	299	# endif
d852ad8b	300	aix_restoreauthdb();
73d9dad3	301	}
f0b467ef	302	# endif /* CUSTOM_FAILED_LOGIN */
2aa3a16c	303
	304	/*
	305	* If we have setauthdb, retrieve the password registry for the user's
d852ad8b	306	* account then feed it to setauthdb. This will mean that subsequent AIX auth
	307	* functions will only use the specified loadable module. If we don't have
	308	* setauthdb this is a no-op.
2aa3a16c	309	*/
	310	void
	311	aix_setauthdb(const char *user)
	312	{
	313	# ifdef HAVE_SETAUTHDB
d852ad8b	314	char *registry;
2aa3a16c	315
	316	if (setuserdb(S_READ) == -1) {
	317	debug3("%s: Could not open userdb to read", __func__);
	318	return;
	319	}
	320
	321	if (getuserattr((char *)user, S_REGISTRY, &registry, SEC_CHAR) == 0) {
d852ad8b	322	if (setauthdb(registry, old_registry) == 0)
d852ad8b	323	debug3("AIX/setauthdb set registry '%s'", registry);
2aa3a16c	324	else
d852ad8b	325	debug3("AIX/setauthdb set registry '%s' failed: %s",
d852ad8b	326	registry, strerror(errno));
2aa3a16c	327	} else
	328	debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
	329	strerror(errno));
	330	enduserdb();
f0b467ef	331	# endif /* HAVE_SETAUTHDB */
2aa3a16c	332	}
90e70cfc	333
d852ad8b	334	/*
	335	* Restore the user's registry settings from old_registry.
	336	* Note that if the first aix_setauthdb fails, setauthdb("") is still safe
	337	* (it restores the system default behaviour). If we don't have setauthdb,
	338	* this is a no-op.
	339	*/
	340	void
	341	aix_restoreauthdb(void)
	342	{
	343	# ifdef HAVE_SETAUTHDB
	344	if (setauthdb(old_registry, NULL) == 0)
	345	debug3("%s: restoring old registry '%s'", __func__,
	346	old_registry);
	347	else
	348	debug3("%s: failed to restore old registry %s", __func__,
	349	old_registry);
	350	# endif /* HAVE_SETAUTHDB */
	351	}
	352
f0b467ef	353	# endif /* WITH_AIXAUTHENTICATE */
f0b467ef	354
5ccf88cb	355	# if defined(AIX_GETNAMEINFO_HACK) && !defined(BROKEN_ADDRINFO)
	356	# undef getnameinfo
	357	/*
	358	* For some reason, AIX's getnameinfo will refuse to resolve the all-zeros
	359	* IPv6 address into its textual representation ("::"), so we wrap it
	360	* with a function that will.
	361	*/
	362	int
	363	sshaix_getnameinfo(const struct sockaddr sa, size_t salen, char host,
	364	size_t hostlen, char *serv, size_t servlen, int flags)
	365	{
	366	struct sockaddr_in6 *sa6;
	367	u_int32_t *a6;
	368
	369	if (flags & (NI_NUMERICHOST\|NI_NUMERICSERV) &&
	370	sa->sa_family == AF_INET6) {
	371	sa6 = (struct sockaddr_in6 *)sa;
	372	a6 = sa6->sin6_addr.u6_addr.u6_addr32;
	373
	374	if (a6[0] == 0 && a6[1] == 0 && a6[2] == 0 && a6[3] == 0) {
	375	strlcpy(host, "::", hostlen);
	376	snprintf(serv, servlen, "%d", sa6->sin6_port);
	377	return 0;
	378	}
	379	}
	380	return getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
	381	}
	382	# endif /* AIX_GETNAMEINFO_HACK */
	383
f0b467ef	384	#endif /* _AIX */