--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ a pass-thru NTVFS module to setup a security context using unix
+ uid/gid
+
+ Copyright (C) Andrew Tridgell 2004
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+struct unixuid_private {
+ void *samctx;
+};
+
+
+/*
+ map a sid to a unix uid
+*/
+static NTSTATUS sid_to_unixuid(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct dom_sid *sid, uid_t *uid)
+{
+ struct unixuid_private *private = ntvfs->private_data;
+ const char *attrs[] = { "sAMAccountName", "UnixID", "UnixName", "sAMAccountType", NULL };
+ int ret;
+ const char *s;
+ void *ctx;
+ struct ldb_message **res;
+ const char *sidstr;
+
+ ctx = talloc(req, 0);
+ sidstr = dom_sid_string(ctx, sid);
+
+ ret = samdb_search(private->samctx, ctx, NULL, &res, attrs, "objectSid=%s", sidstr);
+ if (ret != 1) {
+ DEBUG(2,("Unable to map sid %s to unix uid\n", sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* make sure its a user, not a group */
+ if (samdb_result_uint(res[0], "sAMAccountType", 0) != ATYPE_NORMAL_ACCOUNT) {
+ DEBUG(0,("sid_to_unixuid: sid %s is not ATYPE_NORMAL_ACCOUNT\n", sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* first try to get the uid directly */
+ s = samdb_result_string(res[0], "UnixID", NULL);
+ if (s != NULL) {
+ *uid = strtoul(s, NULL, 0);
+ talloc_free(ctx);
+ return NT_STATUS_OK;
+ }
+
+ /* next try via the UnixName attribute */
+ s = samdb_result_string(res[0], "UnixName", NULL);
+ if (s != NULL) {
+ struct passwd *pwd = getpwnam(s);
+ if (!pwd) {
+ DEBUG(0,("UnixName %s for sid %s does not exist as a local user\n", s, sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ *uid = pwd->pw_uid;
+ talloc_free(ctx);
+ return NT_STATUS_OK;
+ }
+
+ /* finally try via the sAMAccountName attribute */
+ s = samdb_result_string(res[0], "sAMAccountName", NULL);
+ if (s != NULL) {
+ struct passwd *pwd = getpwnam(s);
+ if (!pwd) {
+ DEBUG(0,("sAMAccountName '%s' for sid %s does not exist as a local user\n", s, sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ *uid = pwd->pw_uid;
+ talloc_free(ctx);
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(0,("No sAMAccountName for sid %s!?\n", sidstr));
+
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+}
+
+
+/*
+ map a sid to a unix gid
+*/
+static NTSTATUS sid_to_unixgid(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct dom_sid *sid, gid_t *gid)
+{
+ struct unixuid_private *private = ntvfs->private_data;
+ const char *attrs[] = { "sAMAccountName", "UnixID", "UnixName", "sAMAccountType", NULL };
+ int ret;
+ const char *s;
+ void *ctx;
+ struct ldb_message **res;
+ const char *sidstr;
+
+ ctx = talloc(req, 0);
+ sidstr = dom_sid_string(ctx, sid);
+
+ ret = samdb_search(private->samctx, ctx, NULL, &res, attrs, "objectSid=%s", sidstr);
+ if (ret != 1) {
+ DEBUG(2,("Unable to map sid %s to unix gid\n", sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* make sure its not a user */
+ if (samdb_result_uint(res[0], "sAMAccountType", 0) == ATYPE_NORMAL_ACCOUNT) {
+ DEBUG(0,("sid_to_unixgid: sid %s is a ATYPE_NORMAL_ACCOUNT\n", sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ /* first try to get the gid directly */
+ s = samdb_result_string(res[0], "UnixID", NULL);
+ if (s != NULL) {
+ *gid = strtoul(s, NULL, 0);
+ talloc_free(ctx);
+ return NT_STATUS_OK;
+ }
+
+ /* next try via the UnixName attribute */
+ s = samdb_result_string(res[0], "UnixName", NULL);
+ if (s != NULL) {
+ struct group *grp = getgrnam(s);
+ if (!grp) {
+ DEBUG(0,("UnixName '%s' for sid %s does not exist as a local group\n", s, sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ *gid = grp->gr_gid;
+ talloc_free(ctx);
+ return NT_STATUS_OK;
+ }
+
+ /* finally try via the sAMAccountName attribute */
+ s = samdb_result_string(res[0], "sAMAccountName", NULL);
+ if (s != NULL) {
+ struct group *grp = getgrnam(s);
+ if (!grp) {
+ DEBUG(0,("sAMAccountName '%s' for sid %s does not exist as a local group\n", s, sidstr));
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ *gid = grp->gr_gid;
+ talloc_free(ctx);
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(0,("No sAMAccountName for sid %s!?\n", sidstr));
+
+ talloc_free(ctx);
+ return NT_STATUS_ACCESS_DENIED;
+}
+
+struct unix_sec_ctx {
+ uid_t uid;
+ gid_t gid;
+ uint_t ngroups;
+ gid_t *groups;
+};
+
+/*
+ pull the current security context into a unix_sec_ctx
+*/
+static struct unix_sec_ctx *save_unix_security(TALLOC_CTX *mem_ctx)
+{
+ struct unix_sec_ctx *sec = talloc_p(mem_ctx, struct unix_sec_ctx);
+ if (sec == NULL) {
+ return NULL;
+ }
+ sec->uid = geteuid();
+ sec->gid = getegid();
+ sec->ngroups = getgroups(0, NULL);
+ if (sec->ngroups == -1) {
+ talloc_free(sec);
+ return NULL;
+ }
+ sec->groups = talloc_array_p(sec, gid_t, sec->ngroups);
+ if (sec->groups == NULL) {
+ talloc_free(sec);
+ return NULL;
+ }
+
+ if (getgroups(sec->ngroups, sec->groups) != sec->ngroups) {
+ talloc_free(sec);
+ return NULL;
+ }
+
+ return sec;
+}
+
+/*
+ set the current security context from a unix_sec_ctx
+*/
+static NTSTATUS set_unix_security(struct unix_sec_ctx *sec)
+{
+ seteuid(0);
+
+ if (setgroups(sec->ngroups, sec->groups) != 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ if (setegid(sec->gid) != 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ if (seteuid(sec->uid) != 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ return NT_STATUS_OK;
+}
+
+/*
+ form a unix_sec_ctx from the current session info
+*/
+static NTSTATUS authinfo_to_unix_security(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req,
+ struct auth_serversupplied_info *info,
+ struct unix_sec_ctx **sec)
+{
+ int i;
+ NTSTATUS status;
+ *sec = talloc_p(req, struct unix_sec_ctx);
+
+ status = sid_to_unixuid(ntvfs, req, info->user_sid, &(*sec)->uid);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = sid_to_unixgid(ntvfs, req, info->primary_group_sid, &(*sec)->gid);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ (*sec)->ngroups = info->n_domain_groups;
+ (*sec)->groups = talloc_array_p(*sec, gid_t, (*sec)->ngroups);
+ if ((*sec)->groups == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ for (i=0;i<(*sec)->ngroups;i++) {
+ status = sid_to_unixgid(ntvfs, req, info->domain_groups[i], &(*sec)->groups[i]);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ setup our unix security context according to the session authentication info
+*/
+static NTSTATUS unixuid_setup_security(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct unix_sec_ctx **sec)
+{
+ struct auth_serversupplied_info *info = req->session->session_info->server_info;
+ void *ctx = talloc(req, 0);
+ struct unix_sec_ctx *newsec;
+ NTSTATUS status;
+
+ *sec = save_unix_security(req);
+ if (*sec == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = authinfo_to_unix_security(ntvfs, req, info, &newsec);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(ctx);
+ return status;
+ }
+
+ status = set_unix_security(newsec);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(ctx);
+ return status;
+ }
+
+ talloc_free(ctx);
+
+ return NT_STATUS_OK;
+}
+
+/*
+ this pass through macro operates on request contexts
+*/
+#define PASS_THRU_REQ(ntvfs, req, op, args) do { \
+ NTSTATUS status2; \
+ struct unix_sec_ctx *sec; \
+ status = unixuid_setup_security(ntvfs, req, &sec); \
+ if (NT_STATUS_IS_OK(status)) status = ntvfs_next_##op args; \
+ status2 = set_unix_security(sec); \
+ if (!NT_STATUS_IS_OK(status2)) smb_panic("Unable to reset security context"); \
+} while (0)
+
+
+
+/*
+ connect to a share - used when a tree_connect operation comes in.
+*/
+static NTSTATUS unixuid_connect(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, const char *sharename)
+{
+ struct unixuid_private *private;
+ NTSTATUS status;
+
+ private = talloc_p(req->tcon, struct unixuid_private);
+ if (!private) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ private->samctx = samdb_connect(private);
+ if (private->samctx == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ ntvfs->private_data = private;
+
+ PASS_THRU_REQ(ntvfs, req, connect, (ntvfs, req, sharename));
+
+ return status;
+}
+
+/*
+ disconnect from a share
+*/
+static NTSTATUS unixuid_disconnect(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_tcon *tcon)
+{
+ struct unixuid_private *private = ntvfs->private_data;
+ NTSTATUS status;
+
+ talloc_free(private);
+
+ status = ntvfs_next_disconnect(ntvfs, tcon);
+
+ return status;
+}
+
+
+/*
+ delete a file
+*/
+static NTSTATUS unixuid_unlink(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_unlink *unl)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, unlink, (ntvfs, req, unl));
+
+ return status;
+}
+
+/*
+ ioctl interface
+*/
+static NTSTATUS unixuid_ioctl(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_ioctl *io)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, ioctl, (ntvfs, req, io));
+
+ return status;
+}
+
+/*
+ check if a directory exists
+*/
+static NTSTATUS unixuid_chkpath(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_chkpath *cp)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, chkpath, (ntvfs, req, cp));
+
+ return status;
+}
+
+/*
+ return info on a pathname
+*/
+static NTSTATUS unixuid_qpathinfo(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_fileinfo *info)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, qpathinfo, (ntvfs, req, info));
+
+ return status;
+}
+
+/*
+ query info on a open file
+*/
+static NTSTATUS unixuid_qfileinfo(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_fileinfo *info)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, qfileinfo, (ntvfs, req, info));
+
+ return status;
+}
+
+
+/*
+ set info on a pathname
+*/
+static NTSTATUS unixuid_setpathinfo(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_setfileinfo *st)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, setpathinfo, (ntvfs, req, st));
+
+ return status;
+}
+
+/*
+ open a file
+*/
+static NTSTATUS unixuid_open(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_open *io)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, open, (ntvfs, req, io));
+
+ return status;
+}
+
+/*
+ create a directory
+*/
+static NTSTATUS unixuid_mkdir(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_mkdir *md)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, mkdir, (ntvfs, req, md));
+
+ return status;
+}
+
+/*
+ remove a directory
+*/
+static NTSTATUS unixuid_rmdir(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_rmdir *rd)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, rmdir, (ntvfs, req, rd));
+
+ return status;
+}
+
+/*
+ rename a set of files
+*/
+static NTSTATUS unixuid_rename(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_rename *ren)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, rename, (ntvfs, req, ren));
+
+ return status;
+}
+
+/*
+ copy a set of files
+*/
+static NTSTATUS unixuid_copy(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_copy *cp)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, copy, (ntvfs, req, cp));
+
+ return status;
+}
+
+/*
+ read from a file
+*/
+static NTSTATUS unixuid_read(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_read *rd)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, read, (ntvfs, req, rd));
+
+ return status;
+}
+
+/*
+ write to a file
+*/
+static NTSTATUS unixuid_write(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_write *wr)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, write, (ntvfs, req, wr));
+
+ return status;
+}
+
+/*
+ seek in a file
+*/
+static NTSTATUS unixuid_seek(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_seek *io)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, seek, (ntvfs, req, io));
+
+ return status;
+}
+
+/*
+ flush a file
+*/
+static NTSTATUS unixuid_flush(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_flush *io)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, flush, (ntvfs, req, io));
+
+ return status;
+}
+
+/*
+ close a file
+*/
+static NTSTATUS unixuid_close(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_close *io)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, close, (ntvfs, req, io));
+
+ return status;
+}
+
+/*
+ exit - closing files
+*/
+static NTSTATUS unixuid_exit(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, exit, (ntvfs, req));
+
+ return status;
+}
+
+/*
+ logoff - closing files
+*/
+static NTSTATUS unixuid_logoff(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, logoff, (ntvfs, req));
+
+ return status;
+}
+
+/*
+ lock a byte range
+*/
+static NTSTATUS unixuid_lock(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_lock *lck)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, lock, (ntvfs, req, lck));
+
+ return status;
+}
+
+/*
+ set info on a open file
+*/
+static NTSTATUS unixuid_setfileinfo(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req,
+ union smb_setfileinfo *info)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, setfileinfo, (ntvfs, req, info));
+
+ return status;
+}
+
+
+/*
+ return filesystem space info
+*/
+static NTSTATUS unixuid_fsinfo(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_fsinfo *fs)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, fsinfo, (ntvfs, req, fs));
+
+ return status;
+}
+
+/*
+ return print queue info
+*/
+static NTSTATUS unixuid_lpq(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_lpq *lpq)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, lpq, (ntvfs, req, lpq));
+
+ return status;
+}
+
+/*
+ list files in a directory matching a wildcard pattern
+*/
+static NTSTATUS unixuid_search_first(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_search_first *io,
+ void *search_private,
+ BOOL (*callback)(void *, union smb_search_data *))
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, search_first, (ntvfs, req, io, search_private, callback));
+
+ return status;
+}
+
+/* continue a search */
+static NTSTATUS unixuid_search_next(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_search_next *io,
+ void *search_private,
+ BOOL (*callback)(void *, union smb_search_data *))
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, search_next, (ntvfs, req, io, search_private, callback));
+
+ return status;
+}
+
+/* close a search */
+static NTSTATUS unixuid_search_close(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, union smb_search_close *io)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, search_close, (ntvfs, req, io));
+
+ return status;
+}
+
+/* SMBtrans - not used on file shares */
+static NTSTATUS unixuid_trans(struct ntvfs_module_context *ntvfs,
+ struct smbsrv_request *req, struct smb_trans2 *trans2)
+{
+ NTSTATUS status;
+
+ PASS_THRU_REQ(ntvfs, req, trans, (ntvfs, req, trans2));
+
+ return status;
+}
+
+/*
+ initialise the unixuid backend, registering ourselves with the ntvfs subsystem
+ */
+NTSTATUS ntvfs_unixuid_init(void)
+{
+ NTSTATUS ret;
+ struct ntvfs_ops ops;
+
+ ZERO_STRUCT(ops);
+
+ /* fill in the name and type */
+ ops.name = "unixuid";
+ ops.type = NTVFS_DISK;
+
+ /* fill in all the operations */
+ ops.connect = unixuid_connect;
+ ops.disconnect = unixuid_disconnect;
+ ops.unlink = unixuid_unlink;
+ ops.chkpath = unixuid_chkpath;
+ ops.qpathinfo = unixuid_qpathinfo;
+ ops.setpathinfo = unixuid_setpathinfo;
+ ops.open = unixuid_open;
+ ops.mkdir = unixuid_mkdir;
+ ops.rmdir = unixuid_rmdir;
+ ops.rename = unixuid_rename;
+ ops.copy = unixuid_copy;
+ ops.ioctl = unixuid_ioctl;
+ ops.read = unixuid_read;
+ ops.write = unixuid_write;
+ ops.seek = unixuid_seek;
+ ops.flush = unixuid_flush;
+ ops.close = unixuid_close;
+ ops.exit = unixuid_exit;
+ ops.lock = unixuid_lock;
+ ops.setfileinfo = unixuid_setfileinfo;
+ ops.qfileinfo = unixuid_qfileinfo;
+ ops.fsinfo = unixuid_fsinfo;
+ ops.lpq = unixuid_lpq;
+ ops.search_first = unixuid_search_first;
+ ops.search_next = unixuid_search_next;
+ ops.search_close = unixuid_search_close;
+ ops.trans = unixuid_trans;
+ ops.logoff = unixuid_logoff;
+
+ /* register ourselves with the NTVFS subsystem. */
+ ret = register_backend("ntvfs", &ops);
+
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(0,("Failed to register unixuid backend!\n"));
+ }
+
+ return ret;
+}
git.samba.org / kai / samba-autobuild / .git / commitdiff