Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1129 insertions, 0 deletions

diff --git a/nsswitch/winbind_nss_aix.c b/nsswitch/winbind_nss_aix.c
new file mode 100644
index 0000000..f1f00e9
--- /dev/null
+++ b/nsswitch/winbind_nss_aix.c
@@ -0,0 +1,1129 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   AIX loadable authentication module, providing identification and
+   authentication routines against Samba winbind/Windows NT Domain
+
+   Copyright (C) Tim Potter 2003
+   Copyright (C) Steve Roylance 2003
+   Copyright (C) Andrew Tridgell 2003-2004
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+
+  To install this module copy nsswitch/WINBIND to /usr/lib/security and add
+  "WINBIND" in /usr/lib/security/methods.cfg and /etc/security/user
+
+  Note that this module also provides authentication and password
+  changing routines, so you do not need to install the winbind PAM
+  module.
+
+  see
+  http://publib16.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/kernextc/sec_load_mod.htm
+  for some information in the interface that this module implements
+
+  Many thanks to Julianne Haugh for explaining some of the finer
+  details of this interface.
+
+  To debug this module use uess_test.c (which you can get from tridge)
+  or set "options=debug" in /usr/lib/security/methods.cfg
+
+*/
+
+#include "winbind_client.h"
+#include <usersec.h>
+
+/* enable this to log which entry points have not been
+  completed yet */
+#define LOG_UNIMPLEMENTED_CALLS 0
+
+
+#define WB_AIX_ENCODED '_'
+
+static int debug_enabled;
+
+
+static void logit(const char *format, ...)
+{
+	va_list ap;
+	FILE *f;
+	if (!debug_enabled) {
+		return;
+	}
+	f = fopen("/tmp/WINBIND_DEBUG.log", "a");
+	if (!f) return;
+	va_start(ap, format);
+	vfprintf(f, format, ap);
+	va_end(ap);
+	fclose(f);
+}
+
+
+#define HANDLE_ERRORS(ret) do { \
+	if ((ret) == NSS_STATUS_NOTFOUND) { \
+		errno = ENOENT; \
+		return NULL; \
+	} else if ((ret) != NSS_STATUS_SUCCESS) { \
+		errno = EIO; \
+		return NULL; \
+	} \
+} while (0)
+
+#define STRCPY_RET(dest, src) \
+do { \
+	if (strlen(src)+1 > sizeof(dest)) { errno = EINVAL; return -1; } \
+	strncpy(dest, src, sizeof(dest)); \
+	dest[sizeof(dest)-1] = '\0'; \
+} while (0)
+
+#define STRCPY_RETNULL(dest, src) \
+do { \
+	if (strlen(src)+1 > sizeof(dest)) { errno = EINVAL; return NULL; } \
+	strncpy(dest, src, sizeof(dest)); \
+	dest[sizeof(dest)-1] = '\0'; \
+} while (0)
+
+
+/* free a passwd structure */
+static void free_pwd(struct passwd *pwd)
+{
+	free(pwd->pw_name);
+	free(pwd->pw_passwd);
+	free(pwd->pw_gecos);
+	free(pwd->pw_dir);
+	free(pwd->pw_shell);
+	free(pwd);
+}
+
+/* free a group structure */
+static void free_grp(struct group *grp)
+{
+	int i;
+
+	free(grp->gr_name);
+	free(grp->gr_passwd);
+
+	if (!grp->gr_mem) {
+		free(grp);
+		return;
+	}
+
+	for (i=0; grp->gr_mem[i]; i++) {
+		free(grp->gr_mem[i]);
+	}
+
+	free(grp->gr_mem);
+	free(grp);
+}
+
+
+/* replace commas with nulls, and null terminate */
+static void replace_commas(char *s)
+{
+	char *p, *p0=s;
+	for (p=strchr(s, ','); p; p = strchr(p+1, ',')) {
+		*p=0;
+		p0 = p+1;
+	}
+
+	p0[strlen(p0)+1] = 0;
+}
+
+
+/* the decode_*() routines are used to cope with the fact that AIX 5.2
+   and below cannot handle user or group names longer than 8
+   characters in some interfaces. We use the normalize method to
+   provide a mapping to a username that fits, by using the form '_UID'
+   or '_GID'.
+
+   this only works if you can guarantee that the WB_AIX_ENCODED char
+   is not used as the first char of any other username
+*/
+static unsigned decode_id(const char *name)
+{
+	unsigned id;
+	sscanf(name+1, "%u", &id);
+	return id;
+}
+
+static struct passwd *wb_aix_getpwuid(uid_t uid);
+
+static char *decode_user(const char *name)
+{
+	struct passwd *pwd;
+	unsigned id;
+	char *ret;
+
+	sscanf(name+1, "%u", &id);
+	pwd = wb_aix_getpwuid(id);
+	if (!pwd) {
+		return NULL;
+	}
+	ret = strdup(pwd->pw_name);
+
+	free_pwd(pwd);
+
+	logit("decoded '%s' -> '%s'\n", name, ret);
+
+	return ret;
+}
+
+
+/*
+  fill a struct passwd from a winbindd_pw struct, allocating as a single block
+*/
+static struct passwd *fill_pwent(struct winbindd_pw *pw)
+{
+	struct passwd *result;
+
+	result = calloc(1, sizeof(struct passwd));
+	if (!result) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	result->pw_uid = pw->pw_uid;
+	result->pw_gid = pw->pw_gid;
+	result->pw_name   = strdup(pw->pw_name);
+	result->pw_passwd = strdup(pw->pw_passwd);
+	result->pw_gecos  = strdup(pw->pw_gecos);
+	result->pw_dir    = strdup(pw->pw_dir);
+	result->pw_shell  = strdup(pw->pw_shell);
+
+	return result;
+}
+
+
+/*
+  fill a struct group from a winbindd_pw struct, allocating as a single block
+*/
+static struct group *fill_grent(struct winbindd_gr *gr, char *gr_mem)
+{
+	int i;
+	struct group *result;
+	char *p, *name;
+
+	result = calloc(1, sizeof(struct group));
+	if (!result) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	result->gr_gid = gr->gr_gid;
+
+	result->gr_name   = strdup(gr->gr_name);
+	result->gr_passwd = strdup(gr->gr_passwd);
+
+	/* Group membership */
+	if ((gr->num_gr_mem < 0) || !gr_mem) {
+		gr->num_gr_mem = 0;
+	}
+
+	if (gr->num_gr_mem == 0) {
+		/* Group is empty */
+		return result;
+	}
+
+	result->gr_mem = (char **)malloc(sizeof(char *) * (gr->num_gr_mem+1));
+	if (!result->gr_mem) {
+		free(result->gr_name);
+		free(result->gr_passwd);
+		free(result);
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	/* Start looking at extra data */
+	i=0;
+	for (name = strtok_r(gr_mem, ",", &p);
+	     name;
+	     name = strtok_r(NULL, ",", &p)) {
+		if (i == gr->num_gr_mem) {
+			break;
+		}
+		result->gr_mem[i] = strdup(name);
+		i++;
+	}
+
+	/* Terminate list */
+	result->gr_mem[i] = NULL;
+
+	return result;
+}
+
+
+
+/* take a group id and return a filled struct group */
+static struct group *wb_aix_getgrgid(gid_t gid)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	struct group *grp;
+	NSS_STATUS ret;
+
+	logit("getgrgid %d\n", gid);
+
+	request.data.gid = gid;
+
+	ret = winbindd_request_response(NULL, WINBINDD_GETGRGID,
+					&request, &response);
+
+	logit("getgrgid ret=%d\n", ret);
+
+	HANDLE_ERRORS(ret);
+
+	grp = fill_grent(&response.data.gr, response.extra_data.data);
+
+	winbindd_free_response(&response);
+
+	return grp;
+}
+
+/* take a group name and return a filled struct group */
+static struct group *wb_aix_getgrnam(const char *name)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	NSS_STATUS ret;
+	struct group *grp;
+
+	if (*name == WB_AIX_ENCODED) {
+		return wb_aix_getgrgid(decode_id(name));
+	}
+
+	logit("getgrnam '%s'\n", name);
+
+	STRCPY_RETNULL(request.data.groupname, name);
+
+	ret = winbindd_request_response(NULL, WINBINDD_GETGRNAM,
+					&request, &response);
+
+	HANDLE_ERRORS(ret);
+
+	grp = fill_grent(&response.data.gr, response.extra_data.data);
+
+	winbindd_free_response(&response);
+
+	return grp;
+}
+
+
+/* this call doesn't have to fill in the gr_mem, but we do anyway
+   for simplicity */
+static struct group *wb_aix_getgracct(void *id, int type)
+{
+	if (type == 1) {
+		return wb_aix_getgrnam((char *)id);
+	}
+	if (type == 0) {
+		return wb_aix_getgrgid(*(int *)id);
+	}
+	errno = EINVAL;
+	return NULL;
+}
+
+
+/* take a username and return a string containing a comma-separated
+   list of group id numbers to which the user belongs */
+static char *wb_aix_getgrset(char *user)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	NSS_STATUS ret;
+	int i, idx;
+	char *tmpbuf;
+	int num_gids;
+	gid_t *gid_list;
+	char *r_user = user;
+
+	if (*user == WB_AIX_ENCODED) {
+		r_user = decode_user(r_user);
+		if (!r_user) {
+			errno = ENOENT;
+			return NULL;
+		}
+	}
+
+	logit("getgrset '%s'\n", r_user);
+
+	STRCPY_RETNULL(request.data.username, r_user);
+
+	if (*user == WB_AIX_ENCODED) {
+		free(r_user);
+	}
+
+	ret = winbindd_request_response(NULL, WINBINDD_GETGROUPS,
+					&request, &response);
+
+	HANDLE_ERRORS(ret);
+
+	num_gids = response.data.num_entries;
+	gid_list = (gid_t *)response.extra_data.data;
+
+	/* allocate a space large enough to contruct the string */
+	tmpbuf = malloc(num_gids*12);
+	if (!tmpbuf) {
+		return NULL;
+	}
+
+	for (idx=i=0; i < num_gids-1; i++) {
+		idx += sprintf(tmpbuf+idx, "%u,", gid_list[i]);
+	}
+	idx += sprintf(tmpbuf+idx, "%u", gid_list[i]);
+
+	winbindd_free_response(&response);
+
+	return tmpbuf;
+}
+
+
+/* take a uid and return a filled struct passwd */
+static struct passwd *wb_aix_getpwuid(uid_t uid)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	NSS_STATUS ret;
+	struct passwd *pwd;
+
+	logit("getpwuid '%d'\n", uid);
+
+	request.data.uid = uid;
+
+	ret = winbindd_request_response(NULL, WINBINDD_GETPWUID,
+					&request, &response);
+
+	HANDLE_ERRORS(ret);
+
+	pwd = fill_pwent(&response.data.pw);
+
+	winbindd_free_response(&response);
+
+	logit("getpwuid gave ptr %p\n", pwd);
+
+	return pwd;
+}
+
+
+/* take a username and return a filled struct passwd */
+static struct passwd *wb_aix_getpwnam(const char *name)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	NSS_STATUS ret;
+	struct passwd *pwd;
+
+	if (*name == WB_AIX_ENCODED) {
+		return wb_aix_getpwuid(decode_id(name));
+	}
+
+	logit("getpwnam '%s'\n", name);
+
+	STRCPY_RETNULL(request.data.username, name);
+
+	ret = winbindd_request_response(NULL, WINBINDD_GETPWNAM,
+					&request, &response);
+
+	HANDLE_ERRORS(ret);
+
+	pwd = fill_pwent(&response.data.pw);
+
+	winbindd_free_response(&response);
+
+	logit("getpwnam gave ptr %p\n", pwd);
+
+	return pwd;
+}
+
+/*
+  list users
+*/
+static int wb_aix_lsuser(char *attributes[], attrval_t results[], int size)
+{
+	NSS_STATUS ret;
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	int len;
+	char *s;
+
+	if (size != 1 || strcmp(attributes[0], S_USERS) != 0) {
+		logit("invalid lsuser op\n");
+		errno = EINVAL;
+		return -1;
+	}
+
+	ret = winbindd_request_response(NULL, WINBINDD_LIST_USERS,
+					&request, &response);
+	if (ret != 0) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	len = strlen(response.extra_data.data);
+
+	s = malloc(len+2);
+	if (!s) {
+		winbindd_free_response(&response);
+		errno = ENOMEM;
+		return -1;
+	}
+
+	memcpy(s, response.extra_data.data, len+1);
+
+	replace_commas(s);
+
+	results[0].attr_un.au_char = s;
+	results[0].attr_flag = 0;
+
+	winbindd_free_response(&response);
+
+	return 0;
+}
+
+
+/*
+  list groups
+*/
+static int wb_aix_lsgroup(char *attributes[], attrval_t results[], int size)
+{
+	NSS_STATUS ret;
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+	int len;
+	char *s;
+
+	if (size != 1 || strcmp(attributes[0], S_GROUPS) != 0) {
+		logit("invalid lsgroup op\n");
+		errno = EINVAL;
+		return -1;
+	}
+
+	ret = winbindd_request_response(NULL, WINBINDD_LIST_GROUPS,
+					&request, &response);
+	if (ret != 0) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	len = strlen(response.extra_data.data);
+
+	s = malloc(len+2);
+	if (!s) {
+		winbindd_free_response(&response);
+		errno = ENOMEM;
+		return -1;
+	}
+
+	memcpy(s, response.extra_data.data, len+1);
+
+	replace_commas(s);
+
+	results[0].attr_un.au_char = s;
+	results[0].attr_flag = 0;
+
+	winbindd_free_response(&response);
+
+	return 0;
+}
+
+
+static attrval_t pwd_to_group(struct passwd *pwd)
+{
+	attrval_t r = {
+		.attr_flag = EINVAL,
+	};
+	struct group *grp = wb_aix_getgrgid(pwd->pw_gid);
+
+	if (grp != NULL) {
+		r.attr_flag = 0;
+		r.attr_un.au_char = strdup(grp->gr_name);
+		free_grp(grp);
+	}
+
+	return r;
+}
+
+static attrval_t pwd_to_groupsids(struct passwd *pwd)
+{
+	attrval_t r = {
+		.attr_flag = EINVAL,
+	};
+	char *s, *p;
+	size_t mlen;
+
+	if ( (s = wb_aix_getgrset(pwd->pw_name)) == NULL ) {
+		r.attr_flag = EINVAL;
+		return r;
+	}
+
+	mlen = strlen(s)+2;
+	if ( (p = malloc(mlen)) == NULL ) {
+		r.attr_flag = ENOMEM;
+		return r;
+	}
+
+	strncpy(p, s, mlen);
+	p[mlen-1] = '\0';
+	replace_commas(p);
+	free(s);
+
+	r.attr_flag = 0;
+	r.attr_un.au_char = p;
+
+	return r;
+}
+
+static attrval_t pwd_to_sid(struct passwd *pwd)
+{
+	char buf[(1 /* U/G */ + 10 /* 2^32 */ + 1 /* \n */) + 1] = { 0, };
+	int len;
+	struct winbindd_request request;
+	struct winbindd_response response;
+	NSS_STATUS result;
+	attrval_t r = {
+		.attr_flag = ENOENT,
+	};
+
+	len = snprintf(buf, sizeof(buf),
+		       "U%"PRIu32"\n",
+		       (uint32_t)pwd->pw_uid);
+	if (len >= sizeof(buf)) {
+		r = (attrval_t) {
+			.attr_flag = EINVAL,
+		};
+		return r;
+	}
+
+	request = (struct winbindd_request) {
+		.wb_flags = WBFLAG_FROM_NSS,
+		.extra_data.data = buf,
+		.extra_len = strlen(buf)+1,
+	};
+	response = (struct winbindd_response) {
+		.length = 0,
+	};
+
+	result = winbindd_request_response(NULL, WINBINDD_XIDS_TO_SIDS,
+					   &request, &response);
+	if (result == NSS_STATUS_SUCCESS) {
+		r.attr_flag = 0;
+		r.attr_un.au_char = strdup(response.data.sid.sid);
+	}
+
+	return r;
+}
+
+static int wb_aix_user_attrib(const char *key, char *attributes[],
+			      attrval_t results[], int size)
+{
+	struct passwd *pwd;
+	int i;
+
+	pwd = wb_aix_getpwnam(key);
+	if (!pwd) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	for (i=0;i<size;i++) {
+		results[i] = (attrval_t) {
+			.attr_flag = 0,
+		};
+
+		if (strcmp(attributes[i], S_ID) == 0) {
+			results[i].attr_un.au_int = pwd->pw_uid;
+#ifdef _AIXVERSION_530
+		} else if (strcmp(attributes[i], S_PGID) == 0) {
+			results[i].attr_un.au_int = pwd->pw_gid;
+#endif
+		} else if (strcmp(attributes[i], S_PWD) == 0) {
+			results[i].attr_un.au_char = strdup(pwd->pw_passwd);
+		} else if (strcmp(attributes[i], S_HOME) == 0) {
+			results[i].attr_un.au_char = strdup(pwd->pw_dir);
+		} else if (strcmp(attributes[i], S_SHELL) == 0) {
+			results[i].attr_un.au_char = strdup(pwd->pw_shell);
+		} else if (strcmp(attributes[i], S_REGISTRY) == 0) {
+			results[i].attr_un.au_char = strdup("WINBIND");
+		} else if (strcmp(attributes[i], S_GECOS) == 0) {
+			results[i].attr_un.au_char = strdup(pwd->pw_gecos);
+		} else if (strcmp(attributes[i], S_PGRP) == 0) {
+			results[i] = pwd_to_group(pwd);
+		} else if (strcmp(attributes[i], S_GROUPS) == 0) {
+			results[i] = pwd_to_groupsids(pwd);
+		} else if (strcmp(attributes[i], S_GROUPSIDS) == 0) {
+			results[i] = pwd_to_groupsids(pwd);
+		} else if (strcmp(attributes[i], "SID") == 0) {
+			results[i] = pwd_to_sid(pwd);
+		} else {
+			logit("Unknown user attribute '%s'\n", attributes[i]);
+			results[i].attr_flag = EINVAL;
+		}
+	}
+
+	free_pwd(pwd);
+
+	return 0;
+}
+
+static int wb_aix_group_attrib(const char *key, char *attributes[],
+			       attrval_t results[], int size)
+{
+	struct group *grp;
+	int i;
+
+	grp = wb_aix_getgrnam(key);
+	if (!grp) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	for (i=0;i<size;i++) {
+		results[i].attr_flag = 0;
+
+		if (strcmp(attributes[i], S_PWD) == 0) {
+			results[i].attr_un.au_char = strdup(grp->gr_passwd);
+		} else if (strcmp(attributes[i], S_ID) == 0) {
+			results[i].attr_un.au_int = grp->gr_gid;
+		} else {
+			logit("Unknown group attribute '%s'\n", attributes[i]);
+			results[i].attr_flag = EINVAL;
+		}
+	}
+
+	free_grp(grp);
+
+	return 0;
+}
+
+
+/*
+  called for user/group enumerations
+*/
+static int wb_aix_getentry(char *key, char *table, char *attributes[],
+			   attrval_t results[], int size)
+{
+	logit("Got getentry with key='%s' table='%s' size=%d attributes[0]='%s'\n",
+	      key, table, size, attributes[0]);
+
+	if (strcmp(key, "ALL") == 0 &&
+	    strcmp(table, "user") == 0) {
+		return wb_aix_lsuser(attributes, results, size);
+	}
+
+	if (strcmp(key, "ALL") == 0 &&
+	    strcmp(table, "group") == 0) {
+		return wb_aix_lsgroup(attributes, results, size);
+	}
+
+	if (strcmp(table, "user") == 0) {
+		return wb_aix_user_attrib(key, attributes, results, size);
+	}
+
+	if (strcmp(table, "group") == 0) {
+		return wb_aix_group_attrib(key, attributes, results, size);
+	}
+
+	logit("Unknown getentry operation key='%s' table='%s'\n", key, table);
+
+	errno = ENOSYS;
+	return -1;
+}
+
+
+
+/*
+  called to start the backend
+*/
+static void *wb_aix_open(const char *name, const char *domain, int mode, char *options)
+{
+	if (strstr(options, "debug")) {
+		debug_enabled = 1;
+	}
+	logit("open name='%s' mode=%d domain='%s' options='%s'\n", name, domain,
+	      mode, options);
+	return NULL;
+}
+
+static void wb_aix_close(void *token)
+{
+	logit("close\n");
+	return;
+}
+
+#ifdef HAVE_STRUCT_SECMETHOD_TABLE_METHOD_ATTRLIST
+/*
+   return a list of additional attributes supported by the backend
+*/
+static attrlist_t **wb_aix_attrlist(void)
+{
+	/* pretty confusing but we are allocating the array of pointers
+	   and the structures we'll be pointing to all at once.  So
+	   you need N+1 pointers and N structures. */
+
+	attrlist_t **ret = NULL;
+	attrlist_t *offset = NULL;
+	int i;
+	int n;
+	size_t size;
+
+	struct attr_types {
+		const char *name;
+		int flags;
+		int type;
+	} attr_list[] = {
+		/* user attributes */
+		{S_ID, 		AL_USERATTR, 	SEC_INT},
+		{S_PGRP, 	AL_USERATTR,	SEC_CHAR},
+		{S_HOME, 	AL_USERATTR, 	SEC_CHAR},
+		{S_SHELL, 	AL_USERATTR,	SEC_CHAR},
+#ifdef _AIXVERSION_530
+		{S_PGID, 	AL_USERATTR,	SEC_INT},
+#endif
+		{S_GECOS, 	AL_USERATTR,	SEC_CHAR},
+		{S_SHELL, 	AL_USERATTR,	SEC_CHAR},
+		{S_PGRP, 	AL_USERATTR,	SEC_CHAR},
+		{S_GROUPS, 	AL_USERATTR, 	SEC_LIST},
+		{S_GROUPSIDS, 	AL_USERATTR, 	SEC_LIST},
+		{"SID", 	AL_USERATTR,	SEC_CHAR},
+
+		/* group attributes */
+		{S_ID, 		AL_GROUPATTR,	SEC_INT}
+	};
+
+	logit("method attrlist called\n");
+
+	n = sizeof(attr_list) / sizeof(struct attr_types);
+	size = ((n + 1) * sizeof(attrlist_t *));
+
+	if ( (ret = malloc( size )) == NULL ) {
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	/* offset to where the structures start in the buffer */
+
+	offset = (attrlist_t *)(ret + n);
+
+	/* now loop over the user_attr_list[] array and add
+	   all the members */
+
+	for ( i=0; i<n; i++ ) {
+		attrlist_t *a = malloc(sizeof(attrlist_t));
+
+		if ( !a ) {
+			/* this is bad.  Just bail */
+			return NULL;
+		}
+
+		a->al_name  = strdup(attr_list[i].name);
+		a->al_flags = attr_list[i].flags;
+		a->al_type  = attr_list[i].type;
+
+		ret[i] = a;
+	}
+	ret[n] = NULL;
+
+	return ret;
+}
+#endif
+
+
+/*
+  turn a long username into a short one. Needed to cope with the 8 char
+  username limit in AIX 5.2 and below
+*/
+static int wb_aix_normalize(char *longname, char *shortname)
+{
+	struct passwd *pwd;
+
+	logit("normalize '%s'\n", longname);
+
+	/* automatically cope with AIX 5.3 with longer usernames
+	   when it comes out */
+	if (S_NAMELEN > strlen(longname)) {
+		strncpy(shortname, longname, S_NAMELEN);
+		shortname[S_NAMELEN-1] = '\0';
+		return 1;
+	}
+
+	pwd = wb_aix_getpwnam(longname);
+	if (!pwd) {
+		errno = ENOENT;
+		return 0;
+	}
+
+	sprintf(shortname, "%c%07u", WB_AIX_ENCODED, pwd->pw_uid);
+
+	free_pwd(pwd);
+
+	return 1;
+}
+
+
+/*
+  authenticate a user
+ */
+static int wb_aix_authenticate(char *user, char *pass,
+			       int *reenter, char **message)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+        NSS_STATUS result;
+	char *r_user = user;
+
+	logit("authenticate '%s' response='%s'\n", user, pass);
+
+	*reenter = 0;
+	*message = NULL;
+
+	/* Send off request */
+	if (*user == WB_AIX_ENCODED) {
+		r_user = decode_user(r_user);
+		if (!r_user) {
+			return AUTH_NOTFOUND;
+		}
+	}
+
+	STRCPY_RET(request.data.auth.user, r_user);
+	STRCPY_RET(request.data.auth.pass, pass);
+
+	if (*user == WB_AIX_ENCODED) {
+		free(r_user);
+	}
+
+	result = winbindd_request_response(NULL, WINBINDD_PAM_AUTH,
+					   &request, &response);
+
+	winbindd_free_response(&response);
+
+	logit("auth result %d for '%s'\n", result, user);
+
+	if (result == NSS_STATUS_SUCCESS) {
+		errno = 0;
+		return AUTH_SUCCESS;
+	}
+
+	return AUTH_FAILURE;
+}
+
+
+/*
+  change a user password
+*/
+static int wb_aix_chpass(char *user, char *oldpass, char *newpass, char **message)
+{
+	struct winbindd_request request = {
+		.wb_flags = WBFLAG_FROM_NSS,
+	};
+	struct winbindd_response response = {
+		.length = 0,
+	};
+        NSS_STATUS result;
+	char *r_user = user;
+
+	if (*user == WB_AIX_ENCODED) {
+		r_user = decode_user(r_user);
+		if (!r_user) {
+			errno = ENOENT;
+			return -1;
+		}
+	}
+
+	logit("chpass '%s' old='%s' new='%s'\n", r_user, oldpass, newpass);
+
+	*message = NULL;
+
+	/* Send off request */
+	STRCPY_RET(request.data.chauthtok.user, r_user);
+	STRCPY_RET(request.data.chauthtok.oldpass, oldpass);
+	STRCPY_RET(request.data.chauthtok.newpass, newpass);
+
+	if (*user == WB_AIX_ENCODED) {
+		free(r_user);
+	}
+
+	result = winbindd_request_response(NULL, WINBINDD_PAM_CHAUTHTOK,
+					   &request, &response);
+
+	winbindd_free_response(&response);
+
+	if (result == NSS_STATUS_SUCCESS) {
+		errno = 0;
+		return 0;
+	}
+
+	errno = EINVAL;
+	return -1;
+}
+
+/*
+  don't do any password strength testing for now
+*/
+static int wb_aix_passwdrestrictions(char *user, char *newpass, char *oldpass,
+				     char **message)
+{
+	logit("passwdresrictions called for '%s'\n", user);
+	return 0;
+}
+
+
+static int wb_aix_passwdexpired(char *user, char **message)
+{
+	logit("passwdexpired '%s'\n", user);
+	/* we should check the account bits here */
+	return 0;
+}
+
+
+/*
+  we can't return a crypt() password
+*/
+static char *wb_aix_getpasswd(char *user)
+{
+	logit("getpasswd '%s'\n", user);
+	errno = ENOSYS;
+	return NULL;
+}
+
+/*
+  this is called to update things like the last login time. We don't
+  currently pass this onto the DC
+*/
+static int wb_aix_putentry(char *key, char *table, char *attributes[],
+			   attrval_t values[], int size)
+{
+	logit("putentry key='%s' table='%s' attrib='%s'\n",
+	      key, table, size>=1?attributes[0]:"<null>");
+	errno = ENOSYS;
+	return -1;
+}
+
+static int wb_aix_commit(char *key, char *table)
+{
+	logit("commit key='%s' table='%s'\n");
+	errno = ENOSYS;
+	return -1;
+}
+
+static int wb_aix_getgrusers(char *group, void *result, int type, int *size)
+{
+	logit("getgrusers group='%s'\n", group);
+	errno = ENOSYS;
+	return -1;
+}
+
+
+#define DECL_METHOD(x) \
+int method_ ## x(void) \
+{ \
+	logit("UNIMPLEMENTED METHOD '%s'\n", #x); \
+	errno = EINVAL; \
+	return -1; \
+}
+
+#if LOG_UNIMPLEMENTED_CALLS
+DECL_METHOD(delgroup);
+DECL_METHOD(deluser);
+DECL_METHOD(newgroup);
+DECL_METHOD(newuser);
+DECL_METHOD(putgrent);
+DECL_METHOD(putgrusers);
+DECL_METHOD(putpwent);
+DECL_METHOD(lock);
+DECL_METHOD(unlock);
+DECL_METHOD(getcred);
+DECL_METHOD(setcred);
+DECL_METHOD(deletecred);
+#endif
+
+int wb_aix_init(struct secmethod_table *methods)
+{
+	ZERO_STRUCTP(methods);
+
+#ifdef HAVE_STRUCT_SECMETHOD_TABLE_METHOD_VERSION
+	methods->method_version = SECMETHOD_VERSION_520;
+#endif
+
+	methods->method_getgrgid           = wb_aix_getgrgid;
+	methods->method_getgrnam           = wb_aix_getgrnam;
+	methods->method_getgrset           = wb_aix_getgrset;
+	methods->method_getpwnam           = wb_aix_getpwnam;
+	methods->method_getpwuid           = wb_aix_getpwuid;
+	methods->method_getentry           = wb_aix_getentry;
+	methods->method_open               = wb_aix_open;
+	methods->method_close              = wb_aix_close;
+	methods->method_normalize          = wb_aix_normalize;
+	methods->method_passwdexpired      = wb_aix_passwdexpired;
+	methods->method_putentry           = wb_aix_putentry;
+	methods->method_getpasswd          = wb_aix_getpasswd;
+	methods->method_authenticate       = wb_aix_authenticate;
+	methods->method_commit             = wb_aix_commit;
+	methods->method_chpass             = wb_aix_chpass;
+	methods->method_passwdrestrictions = wb_aix_passwdrestrictions;
+	methods->method_getgracct          = wb_aix_getgracct;
+	methods->method_getgrusers         = wb_aix_getgrusers;
+#ifdef HAVE_STRUCT_SECMETHOD_TABLE_METHOD_ATTRLIST
+	methods->method_attrlist           = wb_aix_attrlist;
+#endif
+
+#if LOG_UNIMPLEMENTED_CALLS
+	methods->method_delgroup      = method_delgroup;
+	methods->method_deluser       = method_deluser;
+	methods->method_newgroup      = method_newgroup;
+	methods->method_newuser       = method_newuser;
+	methods->method_putgrent      = method_putgrent;
+	methods->method_putgrusers    = method_putgrusers;
+	methods->method_putpwent      = method_putpwent;
+	methods->method_lock          = method_lock;
+	methods->method_unlock        = method_unlock;
+	methods->method_getcred       = method_getcred;
+	methods->method_setcred       = method_setcred;
+	methods->method_deletecred    = method_deletecred;
+#endif
+
+	return AUTH_SUCCESS;
+}