[gssapi-openssh.git] / openssh / 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 <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
d03f4262	1	/*
	2	*
	3	* Copyright (c) 2001 Gert Doering. All rights reserved.
2ce0bfe4	4	* Copyright (c) 2003,2004,2005 Darren Tucker. All rights reserved.
d03f4262	5	*
	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	*/
d832c38e	27	#include "includes.h"
540d72c3	28	#include "auth.h"
7cac2b65	29	#include "ssh.h"
7cac2b65	30	#include "log.h"
29d88157	31	#include "xmalloc.h"
540d72c3	32	#include "buffer.h"
d832c38e	33
	34	#ifdef _AIX
	35
d832c38e	36	#include <uinfo.h>
dfddba3d	37	#include <sys/socket.h>
7cac2b65	38	#include "port-aix.h"
7cac2b65	39
540d72c3	40	# ifdef HAVE_SETAUTHDB
	41	static char old_registry[REGISTRY_SIZE] = "";
	42	# endif
d832c38e	43
d832c38e	44	/*
2ce0bfe4	45	* AIX has a "usrinfo" area where logname and other stuff is stored -
d03f4262	46	* a few applications actually use this and die if it's not set
	47	*
	48	* NOTE: TTY= should be set, but since no one uses it and it's hard to
	49	* acquire due to privsep code. We will just drop support.
d832c38e	50	*/
d832c38e	51	void
d03f4262	52	aix_usrinfo(struct passwd *pw)
d832c38e	53	{
d832c38e	54	u_int i;
7cac2b65	55	size_t len;
d03f4262	56	char *cp;
d832c38e	57
7cac2b65	58	len = sizeof("LOGNAME= NAME= ") + (2 * strlen(pw->pw_name));
	59	cp = xmalloc(len);
	60
2ce0bfe4	61	i = snprintf(cp, len, "LOGNAME=%s%cNAME=%s%c", pw->pw_name, '\0',
7cac2b65	62	pw->pw_name, '\0');
d832c38e	63	if (usrinfo(SETUINFO, cp, i) == -1)
	64	fatal("Couldn't set usrinfo: %s", strerror(errno));
	65	debug3("AIX/UsrInfo: set len %d", i);
7cac2b65	66
d832c38e	67	xfree(cp);
	68	}
	69
540d72c3	70	# ifdef WITH_AIXAUTHENTICATE
7cac2b65	71	/*
	72	* Remove embedded newlines in string (if any).
	73	* Used before logging messages returned by AIX authentication functions
	74	* so the message is logged on one line.
	75	*/
	76	void
	77	aix_remove_embedded_newlines(char *p)
	78	{
	79	if (p == NULL)
	80	return;
	81
	82	for (; *p; p++) {
	83	if (*p == '\n')
	84	*p = ' ';
	85	}
	86	/* Remove trailing whitespace */
	87	if (*--p == ' ')
	88	*p = '\0';
	89	}
540d72c3	90
dfddba3d	91	/*
	92	* Test specifically for the case where SYSTEM == NONE and AUTH1 contains
	93	* anything other than NONE or SYSTEM, which indicates that the admin has
	94	* configured the account for purely AUTH1-type authentication.
	95	*
	96	* Since authenticate() doesn't check AUTH1, and sshd can't sanely support
	97	* AUTH1 itself, in such a case authenticate() will allow access without
	98	* authentation, which is almost certainly not what the admin intends.
	99	*
	100	* (The native tools, eg login, will process the AUTH1 list in addition to
	101	* the SYSTEM list by using ckuserID(), however ckuserID() and AUTH1 methods
	102	* have been deprecated since AIX 4.2.x and would be very difficult for sshd
	103	* to support.
	104	*
	105	* Returns 0 if an unsupportable combination is found, 1 otherwise.
	106	*/
	107	static int
	108	aix_valid_authentications(const char *user)
	109	{
	110	char auth1, sys, *p;
	111	int valid = 1;
	112
	113	if (getuserattr((char *)user, S_AUTHSYSTEM, &sys, SEC_CHAR) != 0) {
	114	logit("Can't retrieve attribute SYSTEM for %s: %.100s",
	115	user, strerror(errno));
	116	return 0;
	117	}
	118
	119	debug3("AIX SYSTEM attribute %s", sys);
	120	if (strcmp(sys, "NONE") != 0)
	121	return 1; /* not "NONE", so is OK */
	122
	123	if (getuserattr((char *)user, S_AUTH1, &auth1, SEC_LIST) != 0) {
	124	logit("Can't retrieve attribute auth1 for %s: %.100s",
	125	user, strerror(errno));
	126	return 0;
	127	}
	128
	129	p = auth1;
	130	/* A SEC_LIST is concatenated strings, ending with two NULs. */
	131	while (p[0] != '\0' && p[1] != '\0') {
	132	debug3("AIX auth1 attribute list member %s", p);
	133	if (strcmp(p, "NONE") != 0 && strcmp(p, "SYSTEM")) {
	134	logit("Account %s has unsupported auth1 value '%s'",
	135	user, p);
	136	valid = 0;
	137	}
	138	p += strlen(p) + 1;
	139	}
	140
	141	return (valid);
	142	}
	143
540d72c3	144	/*
	145	* Do authentication via AIX's authenticate routine. We loop until the
	146	* reenter parameter is 0, but normally authenticate is called only once.
	147	*
	148	* Note: this function returns 1 on success, whereas AIX's authenticate()
	149	* returns 0.
	150	*/
	151	int
8b32eddc	152	sys_auth_passwd(Authctxt ctxt, const char password)
540d72c3	153	{
2ce0bfe4	154	char authmsg = NULL, msg = NULL, *name = ctxt->pw->pw_name;
540d72c3	155	int authsuccess = 0, expired, reenter, result;
	156
	157	do {
	158	result = authenticate((char )name, (char )password, &reenter,
	159	&authmsg);
	160	aix_remove_embedded_newlines(authmsg);
2ce0bfe4	161	debug3("AIX/authenticate result %d, authmsg %.100s", result,
540d72c3	162	authmsg);
	163	} while (reenter);
	164
dfddba3d	165	if (!aix_valid_authentications(name))
	166	result = -1;
	167
540d72c3	168	if (result == 0) {
	169	authsuccess = 1;
	170
2ce0bfe4	171	/*
540d72c3	172	* Record successful login. We don't have a pty yet, so just
	173	* label the line as "ssh"
	174	*/
	175	aix_setauthdb(name);
540d72c3	176
	177	/*
	178	* Check if the user's password is expired.
	179	*/
7e82606e	180	expired = passwdexpired(name, &msg);
7e82606e	181	if (msg && *msg) {
8b32eddc	182	buffer_append(ctxt->loginmsg, msg, strlen(msg));
7e82606e	183	aix_remove_embedded_newlines(msg);
	184	}
	185	debug3("AIX/passwdexpired returned %d msg %.100s", expired, msg);
540d72c3	186
	187	switch (expired) {
	188	case 0: /* password not expired */
	189	break;
	190	case 1: /* expired, password change required */
	191	ctxt->force_pwchange = 1;
540d72c3	192	break;
	193	default: /* user can't change(2) or other error (-1) */
	194	logit("Password can't be changed for user %s: %.100s",
	195	name, msg);
	196	if (msg)
	197	xfree(msg);
	198	authsuccess = 0;
	199	}
	200
	201	aix_restoreauthdb();
	202	}
	203
	204	if (authmsg != NULL)
	205	xfree(authmsg);
	206
	207	return authsuccess;
	208	}
7e82606e	209
	210	/*
	211	* Check if specified account is permitted to log in.
	212	* Returns 1 if login is allowed, 0 if not allowed.
	213	*/
	214	int
dfddba3d	215	sys_auth_allowed_user(struct passwd pw, Buffer loginmsg)
7e82606e	216	{
	217	char *msg = NULL;
	218	int result, permitted = 0;
	219	struct stat st;
	220
	221	/*
	222	* Don't perform checks for root account (PermitRootLogin controls
	223	* logins via * ssh) or if running as non-root user (since
	224	* loginrestrictions will always fail due to insufficient privilege).
	225	*/
	226	if (pw->pw_uid == 0 \|\| geteuid() != 0) {
	227	debug3("%s: not checking", __func__);
	228	return 1;
	229	}
	230
	231	result = loginrestrictions(pw->pw_name, S_RLOGIN, NULL, &msg);
	232	if (result == 0)
	233	permitted = 1;
	234	/*
	235	* If restricted because /etc/nologin exists, the login will be denied
	236	* in session.c after the nologin message is sent, so allow for now
	237	* and do not append the returned message.
	238	*/
	239	if (result == -1 && errno == EPERM && stat(_PATH_NOLOGIN, &st) == 0)
	240	permitted = 1;
	241	else if (msg != NULL)
dfddba3d	242	buffer_append(loginmsg, msg, strlen(msg));
7e82606e	243	if (msg == NULL)
	244	msg = xstrdup("(none)");
	245	aix_remove_embedded_newlines(msg);
	246	debug3("AIX/loginrestrictions returned %d msg %.100s", result, msg);
	247
	248	if (!permitted)
	249	logit("Login restricted for %s: %.100s", pw->pw_name, msg);
	250	xfree(msg);
	251	return permitted;
	252	}
	253
	254	int
dfddba3d	255	sys_auth_record_login(const char user, const char host, const char *ttynm,
dfddba3d	256	Buffer *loginmsg)
7e82606e	257	{
2ce0bfe4	258	char *msg = NULL;
7e82606e	259	int success = 0;
	260
	261	aix_setauthdb(user);
dfddba3d	262	if (loginsuccess((char )user, (char )host, (char *)ttynm, &msg) == 0) {
7e82606e	263	success = 1;
7e82606e	264	if (msg != NULL) {
dfddba3d	265	debug("AIX/loginsuccess: msg %s", msg);
dfddba3d	266	buffer_append(loginmsg, msg, strlen(msg));
7e82606e	267	xfree(msg);
	268	}
	269	}
	270	aix_restoreauthdb();
	271	return (success);
	272	}
	273
540d72c3	274	# ifdef CUSTOM_FAILED_LOGIN
7cac2b65	275	/*
	276	* record_failed_login: generic "login failed" interface function
	277	*/
	278	void
dfddba3d	279	record_failed_login(const char user, const char hostname, const char *ttyname)
7cac2b65	280	{
7cac2b65	281	if (geteuid() != 0)
	282	return;
	283
	284	aix_setauthdb(user);
540d72c3	285	# ifdef AIX_LOGINFAILED_4ARG
dfddba3d	286	loginfailed((char )user, (char )hostname, (char *)ttyname,
dfddba3d	287	AUDIT_FAIL_AUTH);
540d72c3	288	# else
dfddba3d	289	loginfailed((char )user, (char )hostname, (char *)ttyname);
540d72c3	290	# endif
540d72c3	291	aix_restoreauthdb();
7cac2b65	292	}
540d72c3	293	# endif /* CUSTOM_FAILED_LOGIN */
7cac2b65	294
	295	/*
	296	* If we have setauthdb, retrieve the password registry for the user's
540d72c3	297	* account then feed it to setauthdb. This will mean that subsequent AIX auth
	298	* functions will only use the specified loadable module. If we don't have
	299	* setauthdb this is a no-op.
7cac2b65	300	*/
	301	void
	302	aix_setauthdb(const char *user)
	303	{
	304	# ifdef HAVE_SETAUTHDB
540d72c3	305	char *registry;
7cac2b65	306
	307	if (setuserdb(S_READ) == -1) {
	308	debug3("%s: Could not open userdb to read", __func__);
	309	return;
	310	}
	311
	312	if (getuserattr((char *)user, S_REGISTRY, &registry, SEC_CHAR) == 0) {
540d72c3	313	if (setauthdb(registry, old_registry) == 0)
540d72c3	314	debug3("AIX/setauthdb set registry '%s'", registry);
7cac2b65	315	else
540d72c3	316	debug3("AIX/setauthdb set registry '%s' failed: %s",
540d72c3	317	registry, strerror(errno));
7cac2b65	318	} else
	319	debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
	320	strerror(errno));
	321	enduserdb();
540d72c3	322	# endif /* HAVE_SETAUTHDB */
7cac2b65	323	}
d832c38e	324
540d72c3	325	/*
	326	* Restore the user's registry settings from old_registry.
	327	* Note that if the first aix_setauthdb fails, setauthdb("") is still safe
	328	* (it restores the system default behaviour). If we don't have setauthdb,
	329	* this is a no-op.
	330	*/
	331	void
	332	aix_restoreauthdb(void)
	333	{
	334	# ifdef HAVE_SETAUTHDB
	335	if (setauthdb(old_registry, NULL) == 0)
	336	debug3("%s: restoring old registry '%s'", __func__,
	337	old_registry);
	338	else
	339	debug3("%s: failed to restore old registry %s", __func__,
	340	old_registry);
	341	# endif /* HAVE_SETAUTHDB */
	342	}
	343
	344	# endif /* WITH_AIXAUTHENTICATE */
	345
dfddba3d	346	# if defined(AIX_GETNAMEINFO_HACK) && !defined(BROKEN_ADDRINFO)
	347	# undef getnameinfo
	348	/*
	349	* For some reason, AIX's getnameinfo will refuse to resolve the all-zeros
	350	* IPv6 address into its textual representation ("::"), so we wrap it
	351	* with a function that will.
	352	*/
	353	int
	354	sshaix_getnameinfo(const struct sockaddr sa, size_t salen, char host,
	355	size_t hostlen, char *serv, size_t servlen, int flags)
	356	{
	357	struct sockaddr_in6 *sa6;
	358	u_int32_t *a6;
	359
	360	if (flags & (NI_NUMERICHOST\|NI_NUMERICSERV) &&
	361	sa->sa_family == AF_INET6) {
	362	sa6 = (struct sockaddr_in6 *)sa;
	363	a6 = sa6->sin6_addr.u6_addr.u6_addr32;
	364
	365	if (a6[0] == 0 && a6[1] == 0 && a6[2] == 0 && a6[3] == 0) {
	366	strlcpy(host, "::", hostlen);
	367	snprintf(serv, servlen, "%d", sa6->sin6_port);
	368	return 0;
	369	}
	370	}
	371	return getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
	372	}
	373	# endif /* AIX_GETNAMEINFO_HACK */
	374
540d72c3	375	#endif /* _AIX */