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, 1241 insertions, 0 deletions

diff --git a/source4/libnet/libnet_user.c b/source4/libnet/libnet_user.c
new file mode 100644
index 0000000..f4b90d9
--- /dev/null
+++ b/source4/libnet/libnet_user.c
@@ -0,0 +1,1241 @@
+/* 
+   Unix SMB/CIFS implementation.
+   
+   Copyright (C) Rafal Szczesniak  2005
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program 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 General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#include "includes.h"
+#include "libnet/libnet.h"
+#include "libcli/composite/composite.h"
+#include "auth/credentials/credentials.h"
+#include "librpc/ndr/libndr.h"
+#include "librpc/gen_ndr/samr.h"
+#include "librpc/gen_ndr/ndr_samr_c.h"
+#include "librpc/gen_ndr/lsa.h"
+#include "librpc/gen_ndr/ndr_lsa_c.h"
+#include "libcli/security/security.h"
+
+
+struct create_user_state {
+	struct libnet_CreateUser r;
+	struct libnet_DomainOpen domain_open;
+	struct libnet_rpc_useradd user_add;
+	struct libnet_context *ctx;
+
+	/* information about the progress */
+	void (*monitor_fn)(struct monitor_msg *);
+};
+
+
+static void continue_rpc_useradd(struct composite_context *ctx);
+static void continue_domain_open_create(struct composite_context *ctx);
+
+
+/**
+ * Sends request to create user account
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and results of this call
+ * @param monitor function pointer for receiving monitor messages
+ * @return compostite context of this request
+ */
+struct composite_context* libnet_CreateUser_send(struct libnet_context *ctx,
+						 TALLOC_CTX *mem_ctx,
+						 struct libnet_CreateUser *r,
+						 void (*monitor)(struct monitor_msg*))
+{
+	struct composite_context *c;
+	struct create_user_state *s;
+	struct composite_context *create_req;
+	bool prereq_met = false;
+
+	/* composite context allocation and setup */
+	c = composite_create(mem_ctx, ctx->event_ctx);
+	if (c == NULL) return NULL;
+
+	s = talloc_zero(c, struct create_user_state);
+	if (composite_nomem(s, c)) return c;
+
+	c->private_data = s;
+
+	/* store arguments in the state structure */
+	s->ctx = ctx;
+	s->r   = *r;
+	ZERO_STRUCT(s->r.out);
+
+	/* prerequisite: make sure the domain is opened */
+	prereq_met = samr_domain_opened(ctx, c, s->r.in.domain_name, &c, &s->domain_open,
+					continue_domain_open_create, monitor);
+	if (!prereq_met) return c;
+
+	/* prepare arguments for useradd call */
+	s->user_add.in.username       = r->in.user_name;
+	s->user_add.in.domain_handle  = ctx->samr.handle;
+
+	/* send the request */
+	create_req = libnet_rpc_useradd_send(s, s->ctx->event_ctx,
+					     ctx->samr.samr_handle,
+					     &s->user_add, monitor);
+	if (composite_nomem(create_req, c)) return c;
+
+	/* set the next stage */
+	composite_continue(c, create_req, continue_rpc_useradd, c);
+	return c;
+}
+
+
+/*
+ * Stage 0.5 (optional): receive result of domain open request
+ * and send useradd request
+ */
+static void continue_domain_open_create(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct create_user_state *s;
+	struct composite_context *create_req;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct create_user_state);
+
+	/* receive result of DomainOpen call */
+	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domain_open);
+	if (!composite_is_ok(c)) return;
+
+	/* send monitor message */
+	if (s->monitor_fn) s->monitor_fn(&msg);
+	
+	/* prepare arguments for useradd call */
+	s->user_add.in.username       = s->r.in.user_name;
+	s->user_add.in.domain_handle  = s->ctx->samr.handle;
+
+	/* send the request */
+	create_req = libnet_rpc_useradd_send(s, s->ctx->event_ctx,
+					     s->ctx->samr.samr_handle,
+					     &s->user_add, s->monitor_fn);
+	if (composite_nomem(create_req, c)) return;
+
+	/* set the next stage */
+	composite_continue(c, create_req, continue_rpc_useradd, c);
+}
+
+
+/*
+ * Stage 1: receive result of useradd call
+ */
+static void continue_rpc_useradd(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct create_user_state *s;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct create_user_state);
+	
+	/* receive result of the call */
+	c->status = libnet_rpc_useradd_recv(ctx, c, &s->user_add);
+	if (!composite_is_ok(c)) return;
+
+	/* send monitor message */
+	if (s->monitor_fn) s->monitor_fn(&msg);
+
+	/* we're done */
+	composite_done(c);
+}
+
+
+/**
+ * Receive result of CreateUser call
+ *
+ * @param c composite context returned by send request routine
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_CreateUser_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				struct libnet_CreateUser *r)
+{
+	NTSTATUS status;
+
+	r->out.error_string = NULL;
+
+	/* wait for result of async request and check status code */
+	status = composite_wait(c);
+	if (!NT_STATUS_IS_OK(status)) {
+		r->out.error_string = talloc_strdup(mem_ctx, nt_errstr(status));
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+
+/**
+ * Synchronous version of CreateUser call
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_CreateUser(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
+			   struct libnet_CreateUser *r)
+{
+	struct composite_context *c;
+
+	c = libnet_CreateUser_send(ctx, mem_ctx, r, NULL);
+	return libnet_CreateUser_recv(c, mem_ctx, r);
+}
+
+
+struct delete_user_state {
+	struct libnet_DeleteUser r;
+	struct libnet_context *ctx;
+	struct libnet_DomainOpen domain_open;
+	struct libnet_rpc_userdel user_del;
+
+	/* information about the progress */
+	void (*monitor_fn)(struct monitor_msg *);
+};
+
+
+static void continue_rpc_userdel(struct composite_context *ctx);
+static void continue_domain_open_delete(struct composite_context *ctx);
+
+
+/**
+ * Sends request to delete user account
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and result of this call
+ * @param monitor function pointer for receiving monitor messages
+ */
+struct composite_context *libnet_DeleteUser_send(struct libnet_context *ctx,
+						 TALLOC_CTX *mem_ctx,
+						 struct libnet_DeleteUser *r,
+						 void (*monitor)(struct monitor_msg*))
+{
+	struct composite_context *c;
+	struct delete_user_state *s;
+	struct composite_context *delete_req;
+	bool prereq_met = false;
+
+	/* composite context allocation and setup */
+	c = composite_create(mem_ctx, ctx->event_ctx);
+	if (c == NULL) return NULL;
+
+	s = talloc_zero(c, struct delete_user_state);
+	if (composite_nomem(s, c)) return c;
+
+	c->private_data = s;
+
+	/* store arguments in state structure */
+	s->ctx = ctx;
+	s->r   = *r;
+	ZERO_STRUCT(s->r.out);
+	
+	/* prerequisite: make sure the domain is opened before proceeding */
+	prereq_met = samr_domain_opened(ctx, c, s->r.in.domain_name, &c, &s->domain_open,
+					continue_domain_open_delete, monitor);
+	if (!prereq_met) return c;
+
+	/* prepare arguments for userdel call */
+	s->user_del.in.username       = r->in.user_name;
+	s->user_del.in.domain_handle  = ctx->samr.handle;
+
+	/* send request */
+	delete_req = libnet_rpc_userdel_send(s, s->ctx->event_ctx,
+					     ctx->samr.samr_handle,
+					     &s->user_del, monitor);
+	if (composite_nomem(delete_req, c)) return c;
+	
+	/* set the next stage */
+	composite_continue(c, delete_req, continue_rpc_userdel, c);
+	return c;
+}
+
+
+/*
+ * Stage 0.5 (optional): receive result of domain open request
+ * and send useradd request
+ */
+static void continue_domain_open_delete(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct delete_user_state *s;
+	struct composite_context *delete_req;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct delete_user_state);
+
+	/* receive result of DomainOpen call */
+	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domain_open);
+	if (!composite_is_ok(c)) return;
+	
+	/* send monitor message */
+	if (s->monitor_fn) s->monitor_fn(&msg);
+
+	/* prepare arguments for userdel call */
+	s->user_del.in.username       = s->r.in.user_name;
+	s->user_del.in.domain_handle  = s->ctx->samr.handle;
+
+	/* send request */
+	delete_req = libnet_rpc_userdel_send(s, s->ctx->event_ctx,
+					     s->ctx->samr.samr_handle,
+					     &s->user_del, s->monitor_fn);
+	if (composite_nomem(delete_req, c)) return;
+
+	/* set the next stage */
+	composite_continue(c, delete_req, continue_rpc_userdel, c);
+}
+
+
+/*
+ * Stage 1: receive result of userdel call and finish the composite function
+ */
+static void continue_rpc_userdel(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct delete_user_state *s;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct delete_user_state);
+
+	/* receive result of userdel call */
+	c->status = libnet_rpc_userdel_recv(ctx, c, &s->user_del);
+	if (!composite_is_ok(c)) return;
+
+	/* send monitor message */
+	if (s->monitor_fn) s->monitor_fn(&msg);
+
+	/* we're done */
+	composite_done(c);
+}
+
+
+/**
+ * Receives result of asynchronous DeleteUser call
+ *
+ * @param c composite context returned by async DeleteUser call
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and result
+ */
+NTSTATUS libnet_DeleteUser_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				struct libnet_DeleteUser *r)
+{
+	NTSTATUS status;
+	struct delete_user_state *s;
+
+	r->out.error_string = NULL;
+
+	/* wait for result of async request and check status code */
+	status = composite_wait(c);
+	if (!NT_STATUS_IS_OK(status)) {
+		s = talloc_get_type_abort(c->private_data, struct delete_user_state);
+		r->out.error_string = talloc_steal(mem_ctx, s->r.out.error_string);
+	}
+	
+	talloc_free(c);
+	return status;
+}
+
+
+/**
+ * Synchronous version of DeleteUser call
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and result
+ */
+NTSTATUS libnet_DeleteUser(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
+			   struct libnet_DeleteUser *r)
+{
+	struct composite_context *c;
+	
+	c = libnet_DeleteUser_send(ctx, mem_ctx, r, NULL);
+	return libnet_DeleteUser_recv(c, mem_ctx, r);
+}
+
+
+struct modify_user_state {
+	struct libnet_ModifyUser r;
+	struct libnet_context *ctx;
+	struct libnet_DomainOpen domain_open;
+	struct libnet_rpc_userinfo user_info;
+	struct libnet_rpc_usermod user_mod;
+
+	void (*monitor_fn)(struct monitor_msg *);
+};
+
+
+static void continue_rpc_usermod(struct composite_context *ctx);
+static void continue_domain_open_modify(struct composite_context *ctx);
+static NTSTATUS set_user_changes(TALLOC_CTX *mem_ctx, struct usermod_change *mod,
+				 struct libnet_rpc_userinfo *info, struct libnet_ModifyUser *r);
+static void continue_rpc_userinfo(struct composite_context *ctx);
+
+
+/**
+ * Sends request to modify user account
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and result of this call
+ * @param monitor function pointer for receiving monitor messages
+ */
+struct composite_context *libnet_ModifyUser_send(struct libnet_context *ctx,
+						 TALLOC_CTX *mem_ctx,
+						 struct libnet_ModifyUser *r,
+						 void (*monitor)(struct monitor_msg*))
+{
+	const uint16_t level = 21;
+	struct composite_context *c;
+	struct modify_user_state *s;
+	struct composite_context *userinfo_req;
+	bool prereq_met = false;
+
+	c = composite_create(mem_ctx, ctx->event_ctx);
+	if (c == NULL) return NULL;
+
+	s = talloc_zero(c, struct modify_user_state);
+	if (composite_nomem(s, c)) return c;
+
+	c->private_data = s;
+
+	s->ctx = ctx;
+	s->r = *r;
+
+	prereq_met = samr_domain_opened(ctx, c, s->r.in.domain_name, &c, &s->domain_open,
+					continue_domain_open_modify, monitor);
+	if (!prereq_met) return c;
+
+	s->user_info.in.username      = r->in.user_name;
+	s->user_info.in.domain_handle = ctx->samr.handle;
+	s->user_info.in.level         = level;
+
+	userinfo_req = libnet_rpc_userinfo_send(s, s->ctx->event_ctx,
+						ctx->samr.samr_handle,
+						&s->user_info, monitor);
+	if (composite_nomem(userinfo_req, c)) return c;
+
+	composite_continue(c, userinfo_req, continue_rpc_userinfo, c);
+	return c;
+}
+
+
+/*
+ * Stage 0.5 (optional): receive result of domain open request
+ * and send userinfo request
+ */
+static void continue_domain_open_modify(struct composite_context *ctx)
+{
+	const uint16_t level = 21;
+	struct composite_context *c;
+	struct modify_user_state *s;
+	struct composite_context *userinfo_req;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct modify_user_state);
+
+	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domain_open);
+	if (!composite_is_ok(c)) return;
+
+	if (s->monitor_fn) s->monitor_fn(&msg);
+	
+	s->user_info.in.domain_handle  = s->ctx->samr.handle;
+	s->user_info.in.username       = s->r.in.user_name;
+	s->user_info.in.level          = level;
+
+	userinfo_req = libnet_rpc_userinfo_send(s, s->ctx->event_ctx,
+						s->ctx->samr.samr_handle,
+						&s->user_info, s->monitor_fn);
+	if (composite_nomem(userinfo_req, c)) return;
+	
+	composite_continue(c, userinfo_req, continue_rpc_userinfo, c);
+}
+
+
+/*
+ * Stage 1: receive result of userinfo call, prepare user changes
+ * (set the fields a caller required to change) and send usermod request
+ */
+static void continue_rpc_userinfo(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct modify_user_state *s;
+	struct composite_context *usermod_req;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct modify_user_state);
+
+	c->status = libnet_rpc_userinfo_recv(ctx, c, &s->user_info);
+	if (!composite_is_ok(c)) return;
+
+	s->user_mod.in.domain_handle = s->ctx->samr.handle;
+	s->user_mod.in.username      = s->r.in.user_name;
+
+	c->status = set_user_changes(c, &s->user_mod.in.change, &s->user_info, &s->r);
+
+	usermod_req = libnet_rpc_usermod_send(s, s->ctx->event_ctx,
+					      s->ctx->samr.samr_handle,
+					      &s->user_mod, s->monitor_fn);
+	if (composite_nomem(usermod_req, c)) return;
+
+	composite_continue(c, usermod_req, continue_rpc_usermod, c);
+}
+
+
+/*
+ * Prepare user changes: compare userinfo result to requested changes and
+ * set the field values and flags accordingly for user modify call
+ */
+static NTSTATUS set_user_changes(TALLOC_CTX *mem_ctx, struct usermod_change *mod,
+				 struct libnet_rpc_userinfo *info, struct libnet_ModifyUser *r)
+{
+	struct samr_UserInfo21 *user;
+
+	if (mod == NULL || info == NULL || r == NULL || info->in.level != 21) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	user = &info->out.info.info21;
+	mod->fields = 0;        /* reset flag field before setting individual flags */
+
+	/* account name change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, account_name, USERMOD_FIELD_ACCOUNT_NAME);
+
+	/* full name change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, full_name, USERMOD_FIELD_FULL_NAME);
+
+	/* description change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, description, USERMOD_FIELD_DESCRIPTION);
+
+	/* comment change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, comment, USERMOD_FIELD_COMMENT);
+
+	/* home directory change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, home_directory, USERMOD_FIELD_HOME_DIRECTORY);
+
+	/* home drive change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, home_drive, USERMOD_FIELD_HOME_DRIVE);
+
+	/* logon script change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, logon_script, USERMOD_FIELD_LOGON_SCRIPT);
+
+	/* profile path change */
+	SET_FIELD_LSA_STRING(r->in, user, mod, profile_path, USERMOD_FIELD_PROFILE_PATH);
+
+	/* account expiry change */
+	SET_FIELD_NTTIME(r->in, user, mod, acct_expiry, USERMOD_FIELD_ACCT_EXPIRY);
+
+	/* account flags change */
+	SET_FIELD_ACCT_FLAGS(r->in, user, mod, acct_flags, USERMOD_FIELD_ACCT_FLAGS);
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+ * Stage 2: receive result of usermod request and finish the composite function
+ */
+static void continue_rpc_usermod(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct modify_user_state *s;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct modify_user_state);
+	
+	c->status = libnet_rpc_usermod_recv(ctx, c, &s->user_mod);
+	if (!composite_is_ok(c)) return;
+	
+	if (s->monitor_fn) s->monitor_fn(&msg);
+	composite_done(c);
+}
+
+
+/**
+ * Receive result of ModifyUser call
+ *
+ * @param c composite context returned by send request routine
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_ModifyUser_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+				struct libnet_ModifyUser *r)
+{
+	NTSTATUS status = composite_wait(c);
+
+	talloc_free(c);
+	return status;
+}
+
+
+/**
+ * Synchronous version of ModifyUser call
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_ModifyUser(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
+			   struct libnet_ModifyUser *r)
+{
+	struct composite_context *c;
+
+	c = libnet_ModifyUser_send(ctx, mem_ctx, r, NULL);
+	return libnet_ModifyUser_recv(c, mem_ctx, r);
+}
+
+
+struct user_info_state {
+	struct libnet_context *ctx;
+	const char *domain_name;
+	enum libnet_UserInfo_level level;
+	const char *user_name;
+	const char *sid_string;
+	struct libnet_LookupName lookup;
+	struct libnet_DomainOpen domopen;
+	struct libnet_rpc_userinfo userinfo;
+
+	/* information about the progress */
+	void (*monitor_fn)(struct monitor_msg *);
+};
+
+
+static void continue_name_found(struct composite_context *ctx);
+static void continue_domain_open_info(struct composite_context *ctx);
+static void continue_info_received(struct composite_context *ctx);
+
+
+/**
+ * Sends request to get user account information
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and results of this call
+ * @param monitor function pointer for receiving monitor messages
+ * @return compostite context of this request
+ */
+struct composite_context* libnet_UserInfo_send(struct libnet_context *ctx,
+					       TALLOC_CTX *mem_ctx,
+					       struct libnet_UserInfo *r,
+					       void (*monitor)(struct monitor_msg*))
+{
+	struct composite_context *c;
+	struct user_info_state *s;
+	struct composite_context *lookup_req, *info_req;
+	bool prereq_met = false;
+
+	/* composite context allocation and setup */
+	c = composite_create(mem_ctx, ctx->event_ctx);
+	if (c == NULL) return NULL;
+
+	s = talloc_zero(c, struct user_info_state);
+	if (composite_nomem(s, c)) return c;
+
+	c->private_data = s;
+
+	/* store arguments in the state structure */
+	s->monitor_fn = monitor;
+	s->ctx = ctx;
+	s->domain_name = talloc_strdup(c, r->in.domain_name);
+	s->level = r->in.level;
+	switch (s->level) {
+	case USER_INFO_BY_NAME:
+		s->user_name = talloc_strdup(c, r->in.data.user_name);
+		s->sid_string = NULL;
+		break;
+	case USER_INFO_BY_SID:
+		s->user_name = NULL;
+		s->sid_string = dom_sid_string(c, r->in.data.user_sid);
+		break;
+	}
+
+	/* prerequisite: make sure the domain is opened */
+	prereq_met = samr_domain_opened(ctx, c, s->domain_name, &c, &s->domopen,
+					continue_domain_open_info, monitor);
+	if (!prereq_met) return c;
+
+	switch (s->level) {
+	case USER_INFO_BY_NAME:
+		/* prepare arguments for LookupName call */
+		s->lookup.in.domain_name = s->domain_name;
+		s->lookup.in.name        = s->user_name;
+
+		/* send the request */
+		lookup_req = libnet_LookupName_send(ctx, c, &s->lookup,
+						    s->monitor_fn);
+		if (composite_nomem(lookup_req, c)) return c;
+
+		/* set the next stage */
+		composite_continue(c, lookup_req, continue_name_found, c);
+		break;
+	case USER_INFO_BY_SID:
+		/* prepare arguments for UserInfo call */
+		s->userinfo.in.domain_handle = s->ctx->samr.handle;
+		s->userinfo.in.sid = s->sid_string;
+		s->userinfo.in.level = 21;
+
+		/* send the request */
+		info_req = libnet_rpc_userinfo_send(s, s->ctx->event_ctx,
+						    s->ctx->samr.samr_handle,
+						    &s->userinfo,
+						    s->monitor_fn);
+		if (composite_nomem(info_req, c)) return c;
+
+		/* set the next stage */
+		composite_continue(c, info_req, continue_info_received, c);
+		break;
+	}
+
+	return c;
+}
+
+
+/*
+ * Stage 0.5 (optional): receive result of domain open request
+ * and send LookupName request
+ */
+static void continue_domain_open_info(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct user_info_state *s;
+	struct composite_context *lookup_req, *info_req;
+	struct monitor_msg msg;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct user_info_state);
+
+	/* receive result of DomainOpen call */
+	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domopen);
+	if (!composite_is_ok(c)) return;
+
+	/* send monitor message */
+	if (s->monitor_fn) s->monitor_fn(&msg);
+
+	switch (s->level) {
+	case USER_INFO_BY_NAME:
+		/* prepare arguments for LookupName call */
+		s->lookup.in.domain_name = s->domain_name;
+		s->lookup.in.name        = s->user_name;
+
+		/* send the request */
+		lookup_req = libnet_LookupName_send(s->ctx, c, &s->lookup, s->monitor_fn);
+		if (composite_nomem(lookup_req, c)) return;
+
+		/* set the next stage */
+		composite_continue(c, lookup_req, continue_name_found, c);
+		break;
+
+	case USER_INFO_BY_SID:
+		/* prepare arguments for UserInfo call */
+		s->userinfo.in.domain_handle = s->ctx->samr.handle;
+		s->userinfo.in.sid = s->sid_string;
+		s->userinfo.in.level = 21;
+
+		/* send the request */
+		info_req = libnet_rpc_userinfo_send(s, s->ctx->event_ctx,
+						    s->ctx->samr.samr_handle,
+						    &s->userinfo,
+						    s->monitor_fn);
+		if (composite_nomem(info_req, c)) return;
+
+		/* set the next stage */
+		composite_continue(c, info_req, continue_info_received, c);
+		break;
+	}
+}
+
+
+/*
+ * Stage 1: receive the name (if found) and send userinfo request
+ */
+static void continue_name_found(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct user_info_state *s;
+	struct composite_context *info_req;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct user_info_state);
+
+	/* receive result of LookupName call */
+	c->status = libnet_LookupName_recv(ctx, c, &s->lookup);
+	if (!composite_is_ok(c)) return;
+
+	/* we're only interested in user accounts this time */
+	if (s->lookup.out.sid_type != SID_NAME_USER) {
+		composite_error(c, NT_STATUS_NO_SUCH_USER);
+		return;
+	}
+
+	/* prepare arguments for UserInfo call */
+	s->userinfo.in.domain_handle = s->ctx->samr.handle;
+	s->userinfo.in.sid = s->lookup.out.sidstr;
+	s->userinfo.in.level = 21;
+
+	/* send the request */
+	info_req = libnet_rpc_userinfo_send(s, s->ctx->event_ctx,
+					    s->ctx->samr.samr_handle,
+					    &s->userinfo, s->monitor_fn);
+	if (composite_nomem(info_req, c)) return;
+
+	/* set the next stage */
+	composite_continue(c, info_req, continue_info_received, c);
+}
+
+
+/*
+ * Stage 2: receive user account information and finish the composite function
+ */
+static void continue_info_received(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct user_info_state *s;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct user_info_state);
+	
+	/* receive result of userinfo call */
+	c->status = libnet_rpc_userinfo_recv(ctx, c, &s->userinfo);
+	if (!composite_is_ok(c)) return;
+
+	composite_done(c);
+}
+
+
+/**
+ * Receive result of UserInfo call
+ *
+ * @param c composite context returned by send request routine
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_UserInfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
+			      struct libnet_UserInfo *r)
+{
+	NTSTATUS status;
+	struct user_info_state *s;
+
+	status = composite_wait(c);
+
+	if (NT_STATUS_IS_OK(status) && r != NULL) {
+		struct samr_UserInfo21 *info;
+
+		s = talloc_get_type_abort(c->private_data, struct user_info_state);
+		info = &s->userinfo.out.info.info21;
+
+		r->out.user_sid = dom_sid_add_rid(mem_ctx, s->ctx->samr.sid, info->rid);
+		r->out.primary_group_sid = dom_sid_add_rid(mem_ctx, s->ctx->samr.sid, info->primary_gid);
+
+		/* string fields */
+		r->out.account_name   = talloc_steal(mem_ctx, info->account_name.string);
+		r->out.full_name      = talloc_steal(mem_ctx, info->full_name.string);
+		r->out.description    = talloc_steal(mem_ctx, info->description.string);
+		r->out.home_directory = talloc_steal(mem_ctx, info->home_directory.string);
+		r->out.home_drive     = talloc_steal(mem_ctx, info->home_drive.string);
+		r->out.comment        = talloc_steal(mem_ctx, info->comment.string);
+		r->out.logon_script   = talloc_steal(mem_ctx, info->logon_script.string);
+		r->out.profile_path   = talloc_steal(mem_ctx, info->profile_path.string);
+
+		/* time fields (allocation) */
+		r->out.acct_expiry           = talloc(mem_ctx, struct timeval);
+		r->out.allow_password_change = talloc(mem_ctx, struct timeval);
+		r->out.force_password_change = talloc(mem_ctx, struct timeval);
+		r->out.last_logon            = talloc(mem_ctx, struct timeval);
+		r->out.last_logoff           = talloc(mem_ctx, struct timeval);
+		r->out.last_password_change  = talloc(mem_ctx, struct timeval);
+		
+		/* time fields (converting) */
+		nttime_to_timeval(r->out.acct_expiry, info->acct_expiry);
+		nttime_to_timeval(r->out.allow_password_change, info->allow_password_change);
+		nttime_to_timeval(r->out.force_password_change, info->force_password_change);
+		nttime_to_timeval(r->out.last_logon, info->last_logon);
+		nttime_to_timeval(r->out.last_logoff, info->last_logoff);
+		nttime_to_timeval(r->out.last_password_change, info->last_password_change);
+
+		/* flag and number fields */
+		r->out.acct_flags = info->acct_flags;
+
+		r->out.error_string = talloc_strdup(mem_ctx, "Success");
+
+	} else {
+		r->out.error_string = talloc_asprintf(mem_ctx, "Error: %s", nt_errstr(status));
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+
+/**
+ * Synchronous version of UserInfo call
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to a structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_UserInfo(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
+			 struct libnet_UserInfo *r)
+{
+	struct composite_context *c;
+	
+	c = libnet_UserInfo_send(ctx, mem_ctx, r, NULL);
+	return libnet_UserInfo_recv(c, mem_ctx, r);
+}
+
+
+struct userlist_state {
+	struct libnet_context *ctx;
+	const char *domain_name;
+	struct lsa_DomainInfo dominfo;
+	int page_size;
+	uint32_t resume_index;
+	struct userlist *users;
+	uint32_t count;
+
+	struct libnet_DomainOpen domain_open;
+	struct lsa_QueryInfoPolicy query_domain;
+	struct samr_EnumDomainUsers user_list;
+
+	void (*monitor_fn)(struct monitor_msg*);
+};
+
+
+static void continue_lsa_domain_opened(struct composite_context *ctx);
+static void continue_domain_queried(struct tevent_req *subreq);
+static void continue_samr_domain_opened(struct composite_context *ctx);
+static void continue_users_enumerated(struct tevent_req *subreq);
+
+
+/**
+ * Sends request to list (enumerate) user accounts
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and results of this call
+ * @param monitor function pointer for receiving monitor messages
+ * @return compostite context of this request
+ */
+struct composite_context* libnet_UserList_send(struct libnet_context *ctx,
+					       TALLOC_CTX *mem_ctx,
+					       struct libnet_UserList *r,
+					       void (*monitor)(struct monitor_msg*))
+{
+	struct composite_context *c;
+	struct userlist_state *s;
+	struct tevent_req *subreq;
+	bool prereq_met = false;
+
+	/* composite context allocation and setup */
+	c = composite_create(mem_ctx, ctx->event_ctx);
+	if (c == NULL) return NULL;
+
+	s = talloc_zero(c, struct userlist_state);
+	if (composite_nomem(s, c)) return c;
+
+	c->private_data = s;
+
+	/* store the arguments in the state structure */
+	s->ctx          = ctx;
+	s->page_size    = r->in.page_size;
+	s->resume_index = r->in.resume_index;
+	s->domain_name  = talloc_strdup(c, r->in.domain_name);
+	s->monitor_fn   = monitor;
+
+	/* make sure we have lsa domain handle before doing anything */
+	prereq_met = lsa_domain_opened(ctx, c, s->domain_name, &c, &s->domain_open,
+				       continue_lsa_domain_opened, monitor);
+	if (!prereq_met) return c;
+
+	/* prepare arguments of QueryDomainInfo call */
+	s->query_domain.in.handle = &ctx->lsa.handle;
+	s->query_domain.in.level  = LSA_POLICY_INFO_DOMAIN;
+	s->query_domain.out.info  = talloc_zero(c, union lsa_PolicyInformation *);
+	if (composite_nomem(s->query_domain.out.info, c)) return c;
+
+	/* send the request */
+	subreq = dcerpc_lsa_QueryInfoPolicy_r_send(s, c->event_ctx,
+						   ctx->lsa.pipe->binding_handle,
+						   &s->query_domain);
+	if (composite_nomem(subreq, c)) return c;
+
+	tevent_req_set_callback(subreq, continue_domain_queried, c);
+	return c;
+}
+
+
+/*
+ * Stage 0.5 (optional): receive lsa domain handle and send
+ * request to query domain info
+ */
+static void continue_lsa_domain_opened(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct userlist_state *s;
+	struct tevent_req *subreq;
+	
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct userlist_state);
+	
+	/* receive lsa domain handle */
+	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domain_open);
+	if (!composite_is_ok(c)) return;
+
+	/* prepare arguments of QueryDomainInfo call */
+	s->query_domain.in.handle = &s->ctx->lsa.handle;
+	s->query_domain.in.level  = LSA_POLICY_INFO_DOMAIN;
+	s->query_domain.out.info  = talloc_zero(c, union lsa_PolicyInformation *);
+	if (composite_nomem(s->query_domain.out.info, c)) return;
+
+	/* send the request */
+	subreq = dcerpc_lsa_QueryInfoPolicy_r_send(s, c->event_ctx,
+						   s->ctx->lsa.pipe->binding_handle,
+						   &s->query_domain);
+	if (composite_nomem(subreq, c)) return;
+
+	tevent_req_set_callback(subreq, continue_domain_queried, c);
+}
+
+
+/*
+ * Stage 1: receive domain info and request to enum users,
+ * provided a valid samr handle is opened
+ */
+static void continue_domain_queried(struct tevent_req *subreq)
+{
+	struct composite_context *c;
+	struct userlist_state *s;
+	bool prereq_met = false;
+	
+	c = tevent_req_callback_data(subreq, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct userlist_state);
+
+	/* receive result of rpc request */
+	c->status = dcerpc_lsa_QueryInfoPolicy_r_recv(subreq, s);
+	TALLOC_FREE(subreq);
+	if (!composite_is_ok(c)) return;
+
+	/* get the returned domain info */
+	s->dominfo = (*s->query_domain.out.info)->domain;
+
+	/* make sure we have samr domain handle before continuing */
+	prereq_met = samr_domain_opened(s->ctx, c, s->domain_name, &c, &s->domain_open,
+					continue_samr_domain_opened, s->monitor_fn);
+	if (!prereq_met) return;
+
+	/* prepare arguments of EnumDomainUsers call */
+	s->user_list.in.domain_handle = &s->ctx->samr.handle;
+	s->user_list.in.max_size = s->page_size;
+	s->user_list.in.resume_handle = &s->resume_index;
+	s->user_list.in.acct_flags = ACB_NORMAL;
+	s->user_list.out.resume_handle = &s->resume_index;
+	s->user_list.out.num_entries = talloc(s, uint32_t);
+	if (composite_nomem(s->user_list.out.num_entries, c)) return;
+	s->user_list.out.sam = talloc(s, struct samr_SamArray *);
+	if (composite_nomem(s->user_list.out.sam, c)) return;
+
+	/* send the request */
+	subreq = dcerpc_samr_EnumDomainUsers_r_send(s, c->event_ctx,
+						    s->ctx->samr.pipe->binding_handle,
+						    &s->user_list);
+	if (composite_nomem(subreq, c)) return;
+
+	tevent_req_set_callback(subreq, continue_users_enumerated, c);
+}
+
+
+/*
+ * Stage 1.5 (optional): receive samr domain handle
+ * and request to enumerate accounts
+ */
+static void continue_samr_domain_opened(struct composite_context *ctx)
+{
+	struct composite_context *c;
+	struct userlist_state *s;
+	struct tevent_req *subreq;
+
+	c = talloc_get_type_abort(ctx->async.private_data, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct userlist_state);
+
+	/* receive samr domain handle */
+	c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domain_open);
+	if (!composite_is_ok(c)) return;
+
+	/* prepare arguments of EnumDomainUsers call */
+	s->user_list.in.domain_handle = &s->ctx->samr.handle;
+	s->user_list.in.max_size = s->page_size;
+	s->user_list.in.resume_handle = &s->resume_index;
+	s->user_list.in.acct_flags = ACB_NORMAL;
+	s->user_list.out.resume_handle = &s->resume_index;
+	s->user_list.out.sam = talloc(s, struct samr_SamArray *);
+	if (composite_nomem(s->user_list.out.sam, c)) return;
+	s->user_list.out.num_entries = talloc(s, uint32_t);
+	if (composite_nomem(s->user_list.out.num_entries, c)) return;
+	
+	/* send the request */
+	subreq = dcerpc_samr_EnumDomainUsers_r_send(s, c->event_ctx,
+						    s->ctx->samr.pipe->binding_handle,
+						    &s->user_list);
+	if (composite_nomem(subreq, c)) return;
+
+	tevent_req_set_callback(subreq, continue_users_enumerated, c);
+}
+
+
+/*
+ * Stage 2: receive enumerated users and their rids
+ */
+static void continue_users_enumerated(struct tevent_req *subreq)
+{
+	struct composite_context *c;
+	struct userlist_state *s;
+	uint32_t i;
+
+	c = tevent_req_callback_data(subreq, struct composite_context);
+	s = talloc_get_type_abort(c->private_data, struct userlist_state);
+
+	/* receive result of rpc request */
+	c->status = dcerpc_samr_EnumDomainUsers_r_recv(subreq, s);
+	TALLOC_FREE(subreq);
+	if (!composite_is_ok(c)) return;
+
+	/* get the actual status of the rpc call result
+	   (instead of rpc layer status) */
+	c->status = s->user_list.out.result;
+
+	/* we're interested in status "ok" as well as two
+	   enum-specific status codes */
+	if (NT_STATUS_IS_OK(c->status) ||
+	    NT_STATUS_EQUAL(c->status, STATUS_MORE_ENTRIES) ||
+	    NT_STATUS_EQUAL(c->status, NT_STATUS_NO_MORE_ENTRIES)) {
+
+		/* get enumerated accounts counter and resume handle (the latter allows
+		   making subsequent call to continue enumeration) */
+		s->resume_index = *s->user_list.out.resume_handle;
+		s->count        = *s->user_list.out.num_entries;
+		
+		/* prepare returned user accounts array */
+		s->users        = talloc_array(c, struct userlist, (*s->user_list.out.sam)->count);
+		if (composite_nomem(s->users, c)) return;
+
+		for (i = 0; i < (*s->user_list.out.sam)->count; i++) {
+			struct dom_sid *user_sid;
+			struct samr_SamEntry *entry = &(*s->user_list.out.sam)->entries[i];
+			struct dom_sid *domain_sid = (*s->query_domain.out.info)->domain.sid;
+			
+			/* construct user sid from returned rid and queried domain sid */
+			user_sid = dom_sid_add_rid(c, domain_sid, entry->idx);
+			if (composite_nomem(user_sid, c)) return;
+			
+			/* username */
+			s->users[i].username = talloc_strdup(s->users, entry->name.string);
+			if (composite_nomem(s->users[i].username, c)) return;
+
+			/* sid string */
+			s->users[i].sid = dom_sid_string(s->users, user_sid);
+			if (composite_nomem(s->users[i].sid, c)) return;
+		}
+		
+		/* that's it */
+		composite_done(c);
+		return;
+
+	} else {
+		/* something went wrong */
+		composite_error(c, c->status);
+		return;
+	}
+}
+
+
+/**
+ * Receive result of UserList call
+ *
+ * @param c composite context returned by send request routine
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_UserList_recv(struct composite_context* c, TALLOC_CTX *mem_ctx,
+			      struct libnet_UserList *r)
+{
+	NTSTATUS status;
+	struct userlist_state *s;
+
+	if (c == NULL || mem_ctx == NULL || r == NULL) {
+		talloc_free(c);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	status = composite_wait(c);
+	if (NT_STATUS_IS_OK(status) ||
+	    NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES) ||
+	    NT_STATUS_EQUAL(status, NT_STATUS_NO_MORE_ENTRIES)) {
+		
+		s = talloc_get_type_abort(c->private_data, struct userlist_state);
+		
+		/* get results from composite context */
+		r->out.count = s->count;
+		r->out.resume_index = s->resume_index;
+		r->out.users = talloc_steal(mem_ctx, s->users);
+		
+		if (NT_STATUS_IS_OK(status)) {
+			r->out.error_string = talloc_strdup(mem_ctx, "Success");
+		} else {
+			/* success, but we're not done yet */
+			r->out.error_string = talloc_asprintf(mem_ctx, "Success (status: %s)",
+							      nt_errstr(status));
+		}
+
+	} else {
+		r->out.error_string = talloc_asprintf(mem_ctx, "Error: %s", nt_errstr(status));
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+
+/**
+ * Synchronous version of UserList call
+ *
+ * @param ctx initialised libnet context
+ * @param mem_ctx memory context of this call
+ * @param r pointer to structure containing arguments and result of this call
+ * @return nt status
+ */
+NTSTATUS libnet_UserList(struct libnet_context *ctx,
+			 TALLOC_CTX *mem_ctx,
+			 struct libnet_UserList *r)
+{
+	struct composite_context *c;
+
+	c = libnet_UserList_send(ctx, mem_ctx, r, NULL);
+	return libnet_UserList_recv(c, mem_ctx, r);
+}