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

/*
 *
 * Copyright (c) 2001 Gert Doering.  All rights reserved.
 * Copyright (c) 2003,2004 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, Buffer *loginmsg)
{
	char *authmsg = NULL, *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 (!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(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;
	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
41b2f314	1	/*
	2	*
	3	* Copyright (c) 2001 Gert Doering. All rights reserved.
996d5e62	4	* Copyright (c) 2003,2004 Darren Tucker. All rights reserved.
41b2f314	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	*/
e9a17296	27	#include "includes.h"
cdd66111	28	#include "auth.h"
0fff78ff	29	#include "ssh.h"
0fff78ff	30	#include "log.h"
acc3d05e	31	#include "xmalloc.h"
cdd66111	32	#include "buffer.h"
e9a17296	33
	34	#ifdef _AIX
	35
e9a17296	36	#include <uinfo.h>
996d5e62	37	#include <sys/socket.h>
0fff78ff	38	#include "port-aix.h"
0fff78ff	39
cdd66111	40	# ifdef HAVE_SETAUTHDB
	41	static char old_registry[REGISTRY_SIZE] = "";
	42	# endif
e9a17296	43
e9a17296	44	/*
41b2f314	45	* AIX has a "usrinfo" area where logname and other stuff is stored -
	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.
e9a17296	50	*/
996d5e62	51
996d5e62	52
e9a17296	53	void
41b2f314	54	aix_usrinfo(struct passwd *pw)
e9a17296	55	{
e9a17296	56	u_int i;
0fff78ff	57	size_t len;
41b2f314	58	char *cp;
e9a17296	59
0fff78ff	60	len = sizeof("LOGNAME= NAME= ") + (2 * strlen(pw->pw_name));
	61	cp = xmalloc(len);
	62
	63	i = snprintf(cp, len, "LOGNAME=%s%cNAME=%s%c", pw->pw_name, '\0',
	64	pw->pw_name, '\0');
e9a17296	65	if (usrinfo(SETUINFO, cp, i) == -1)
	66	fatal("Couldn't set usrinfo: %s", strerror(errno));
	67	debug3("AIX/UsrInfo: set len %d", i);
0fff78ff	68
e9a17296	69	xfree(cp);
	70	}
	71
cdd66111	72	# ifdef WITH_AIXAUTHENTICATE
0fff78ff	73	/*
	74	* Remove embedded newlines in string (if any).
	75	* Used before logging messages returned by AIX authentication functions
	76	* so the message is logged on one line.
	77	*/
	78	void
	79	aix_remove_embedded_newlines(char *p)
	80	{
	81	if (p == NULL)
	82	return;
	83
	84	for (; *p; p++) {
	85	if (*p == '\n')
	86	*p = ' ';
	87	}
	88	/* Remove trailing whitespace */
	89	if (*--p == ' ')
	90	*p = '\0';
	91	}
cdd66111	92
996d5e62	93	/*
	94	* Test specifically for the case where SYSTEM == NONE and AUTH1 contains
	95	* anything other than NONE or SYSTEM, which indicates that the admin has
	96	* configured the account for purely AUTH1-type authentication.
	97	*
	98	* Since authenticate() doesn't check AUTH1, and sshd can't sanely support
	99	* AUTH1 itself, in such a case authenticate() will allow access without
	100	* authentation, which is almost certainly not what the admin intends.
	101	*
	102	* (The native tools, eg login, will process the AUTH1 list in addition to
	103	* the SYSTEM list by using ckuserID(), however ckuserID() and AUTH1 methods
	104	* have been deprecated since AIX 4.2.x and would be very difficult for sshd
	105	* to support.
	106	*
	107	* Returns 0 if an unsupportable combination is found, 1 otherwise.
	108	*/
	109	static int
	110	aix_valid_authentications(const char *user)
	111	{
	112	char auth1, sys, *p;
	113	int valid = 1;
	114
	115	if (getuserattr((char *)user, S_AUTHSYSTEM, &sys, SEC_CHAR) != 0) {
	116	logit("Can't retrieve attribute SYSTEM for %s: %.100s",
	117	user, strerror(errno));
	118	return 0;
	119	}
	120
	121	debug3("AIX SYSTEM attribute %s", sys);
	122	if (strcmp(sys, "NONE") != 0)
	123	return 1; /* not "NONE", so is OK */
	124
	125	if (getuserattr((char *)user, S_AUTH1, &auth1, SEC_LIST) != 0) {
	126	logit("Can't retrieve attribute auth1 for %s: %.100s",
	127	user, strerror(errno));
	128	return 0;
	129	}
	130
	131	p = auth1;
	132	/* A SEC_LIST is concatenated strings, ending with two NULs. */
	133	while (p[0] != '\0' && p[1] != '\0') {
	134	debug3("AIX auth1 attribute list member %s", p);
	135	if (strcmp(p, "NONE") != 0 && strcmp(p, "SYSTEM")) {
	136	logit("Account %s has unsupported auth1 value '%s'",
	137	user, p);
	138	valid = 0;
	139	}
	140	p += strlen(p) + 1;
	141	}
	142
	143	return (valid);
	144	}
	145
cdd66111	146	/*
	147	* Do authentication via AIX's authenticate routine. We loop until the
	148	* reenter parameter is 0, but normally authenticate is called only once.
	149	*
	150	* Note: this function returns 1 on success, whereas AIX's authenticate()
	151	* returns 0.
	152	*/
	153	int
996d5e62	154	sys_auth_passwd(Authctxt ctxt, const char password, Buffer *loginmsg)
cdd66111	155	{
c9f39d2c	156	char authmsg = NULL, msg, *name = ctxt->pw->pw_name;
cdd66111	157	int authsuccess = 0, expired, reenter, result;
	158
	159	do {
	160	result = authenticate((char )name, (char )password, &reenter,
	161	&authmsg);
	162	aix_remove_embedded_newlines(authmsg);
	163	debug3("AIX/authenticate result %d, msg %.100s", result,
	164	authmsg);
	165	} while (reenter);
	166
996d5e62	167	if (!aix_valid_authentications(name))
	168	result = -1;
	169
cdd66111	170	if (result == 0) {
	171	authsuccess = 1;
	172
cdd66111	173	/*
	174	* Record successful login. We don't have a pty yet, so just
	175	* label the line as "ssh"
	176	*/
	177	aix_setauthdb(name);
cdd66111	178
	179	/*
	180	* Check if the user's password is expired.
	181	*/
c9f39d2c	182	expired = passwdexpired(name, &msg);
c9f39d2c	183	if (msg && *msg) {
996d5e62	184	buffer_append(loginmsg, msg, strlen(msg));
c9f39d2c	185	aix_remove_embedded_newlines(msg);
	186	}
	187	debug3("AIX/passwdexpired returned %d msg %.100s", expired, msg);
cdd66111	188
	189	switch (expired) {
	190	case 0: /* password not expired */
	191	break;
	192	case 1: /* expired, password change required */
	193	ctxt->force_pwchange = 1;
cdd66111	194	break;
	195	default: /* user can't change(2) or other error (-1) */
	196	logit("Password can't be changed for user %s: %.100s",
	197	name, msg);
	198	if (msg)
	199	xfree(msg);
	200	authsuccess = 0;
	201	}
	202
	203	aix_restoreauthdb();
	204	}
	205
	206	if (authmsg != NULL)
	207	xfree(authmsg);
	208
	209	return authsuccess;
	210	}
c9f39d2c	211
	212	/*
	213	* Check if specified account is permitted to log in.
	214	* Returns 1 if login is allowed, 0 if not allowed.
	215	*/
	216	int
996d5e62	217	sys_auth_allowed_user(struct passwd pw, Buffer loginmsg)
c9f39d2c	218	{
	219	char *msg = NULL;
	220	int result, permitted = 0;
	221	struct stat st;
	222
	223	/*
	224	* Don't perform checks for root account (PermitRootLogin controls
	225	* logins via * ssh) or if running as non-root user (since
	226	* loginrestrictions will always fail due to insufficient privilege).
	227	*/
	228	if (pw->pw_uid == 0 \|\| geteuid() != 0) {
	229	debug3("%s: not checking", __func__);
	230	return 1;
	231	}
	232
	233	result = loginrestrictions(pw->pw_name, S_RLOGIN, NULL, &msg);
	234	if (result == 0)
	235	permitted = 1;
	236	/*
	237	* If restricted because /etc/nologin exists, the login will be denied
	238	* in session.c after the nologin message is sent, so allow for now
	239	* and do not append the returned message.
	240	*/
	241	if (result == -1 && errno == EPERM && stat(_PATH_NOLOGIN, &st) == 0)
	242	permitted = 1;
	243	else if (msg != NULL)
996d5e62	244	buffer_append(loginmsg, msg, strlen(msg));
c9f39d2c	245	if (msg == NULL)
	246	msg = xstrdup("(none)");
	247	aix_remove_embedded_newlines(msg);
	248	debug3("AIX/loginrestrictions returned %d msg %.100s", result, msg);
	249
	250	if (!permitted)
	251	logit("Login restricted for %s: %.100s", pw->pw_name, msg);
	252	xfree(msg);
	253	return permitted;
	254	}
	255
	256	int
996d5e62	257	sys_auth_record_login(const char user, const char host, const char *ttynm,
996d5e62	258	Buffer *loginmsg)
c9f39d2c	259	{
	260	char *msg;
	261	int success = 0;
	262
	263	aix_setauthdb(user);
996d5e62	264	if (loginsuccess((char )user, (char )host, (char *)ttynm, &msg) == 0) {
c9f39d2c	265	success = 1;
c9f39d2c	266	if (msg != NULL) {
996d5e62	267	debug("AIX/loginsuccess: msg %s", msg);
996d5e62	268	buffer_append(loginmsg, msg, strlen(msg));
c9f39d2c	269	xfree(msg);
	270	}
	271	}
	272	aix_restoreauthdb();
	273	return (success);
	274	}
	275
cdd66111	276	# ifdef CUSTOM_FAILED_LOGIN
0fff78ff	277	/*
	278	* record_failed_login: generic "login failed" interface function
	279	*/
	280	void
996d5e62	281	record_failed_login(const char user, const char hostname, const char *ttyname)
0fff78ff	282	{
0fff78ff	283	if (geteuid() != 0)
	284	return;
	285
	286	aix_setauthdb(user);
cdd66111	287	# ifdef AIX_LOGINFAILED_4ARG
996d5e62	288	loginfailed((char )user, (char )hostname, (char *)ttyname,
996d5e62	289	AUDIT_FAIL_AUTH);
cdd66111	290	# else
996d5e62	291	loginfailed((char )user, (char )hostname, (char *)ttyname);
cdd66111	292	# endif
cdd66111	293	aix_restoreauthdb();
0fff78ff	294	}
cdd66111	295	# endif /* CUSTOM_FAILED_LOGIN */
0fff78ff	296
	297	/*
	298	* If we have setauthdb, retrieve the password registry for the user's
cdd66111	299	* account then feed it to setauthdb. This will mean that subsequent AIX auth
	300	* functions will only use the specified loadable module. If we don't have
	301	* setauthdb this is a no-op.
0fff78ff	302	*/
	303	void
	304	aix_setauthdb(const char *user)
	305	{
	306	# ifdef HAVE_SETAUTHDB
cdd66111	307	char *registry;
0fff78ff	308
	309	if (setuserdb(S_READ) == -1) {
	310	debug3("%s: Could not open userdb to read", __func__);
	311	return;
	312	}
	313
	314	if (getuserattr((char *)user, S_REGISTRY, &registry, SEC_CHAR) == 0) {
cdd66111	315	if (setauthdb(registry, old_registry) == 0)
cdd66111	316	debug3("AIX/setauthdb set registry '%s'", registry);
0fff78ff	317	else
cdd66111	318	debug3("AIX/setauthdb set registry '%s' failed: %s",
cdd66111	319	registry, strerror(errno));
0fff78ff	320	} else
	321	debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
	322	strerror(errno));
	323	enduserdb();
cdd66111	324	# endif /* HAVE_SETAUTHDB */
0fff78ff	325	}
9cb1827b	326
cdd66111	327	/*
	328	* Restore the user's registry settings from old_registry.
	329	* Note that if the first aix_setauthdb fails, setauthdb("") is still safe
	330	* (it restores the system default behaviour). If we don't have setauthdb,
	331	* this is a no-op.
	332	*/
	333	void
	334	aix_restoreauthdb(void)
	335	{
	336	# ifdef HAVE_SETAUTHDB
	337	if (setauthdb(old_registry, NULL) == 0)
	338	debug3("%s: restoring old registry '%s'", __func__,
	339	old_registry);
	340	else
	341	debug3("%s: failed to restore old registry %s", __func__,
	342	old_registry);
	343	# endif /* HAVE_SETAUTHDB */
	344	}
	345
	346	# endif /* WITH_AIXAUTHENTICATE */
	347
996d5e62	348	# if defined(AIX_GETNAMEINFO_HACK) && !defined(BROKEN_ADDRINFO)
	349	# undef getnameinfo
	350	/*
	351	* For some reason, AIX's getnameinfo will refuse to resolve the all-zeros
	352	* IPv6 address into its textual representation ("::"), so we wrap it
	353	* with a function that will.
	354	*/
	355	int
	356	sshaix_getnameinfo(const struct sockaddr sa, size_t salen, char host,
	357	size_t hostlen, char *serv, size_t servlen, int flags)
	358	{
	359	struct sockaddr_in6 *sa6;
	360	u_int32_t *a6;
	361
	362	if (flags & (NI_NUMERICHOST\|NI_NUMERICSERV) &&
	363	sa->sa_family == AF_INET6) {
	364	sa6 = (struct sockaddr_in6 *)sa;
	365	a6 = sa6->sin6_addr.u6_addr.u6_addr32;
	366
	367	if (a6[0] == 0 && a6[1] == 0 && a6[2] == 0 && a6[3] == 0) {
	368	strlcpy(host, "::", hostlen);
	369	snprintf(serv, servlen, "%d", sa6->sin6_port);
	370	return 0;
	371	}
	372	}
	373	return getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
	374	}
	375	# endif /* AIX_GETNAMEINFO_HACK */
	376
cdd66111	377	#endif /* _AIX */