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samba-mirror/source3/modules/vfs_afsacl.c

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/*
* Convert AFS acls to NT acls and vice versa.
*
* Copyright (C) Volker Lendecke, 2003
*
* 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 "system/filesys.h"
#include "smbd/smbd.h"
#include "../librpc/gen_ndr/lsa.h"
#include "../libcli/security/security.h"
#include "../libcli/security/dom_sid.h"
#include "passdb.h"
#include "lib/afs/afs_settoken.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
#include <afs/stds.h>
#include <afs/afs_args.h>
#include <afs/venus.h>
#include <afs/prs_fs.h>
#define MAXSIZE 2049
extern const struct dom_sid global_sid_World;
extern const struct dom_sid global_sid_Builtin_Administrators;
extern const struct dom_sid global_sid_Builtin_Backup_Operators;
extern const struct dom_sid global_sid_Authenticated_Users;
extern const struct dom_sid global_sid_NULL;
static char space_replacement = '%';
/* Do we expect SIDs as pts names? */
static bool sidpts;
struct afs_ace {
bool positive;
char *name;
struct dom_sid sid;
enum lsa_SidType type;
uint32_t rights;
struct afs_ace *next;
};
struct afs_acl {
TALLOC_CTX *ctx;
int type;
int num_aces;
struct afs_ace *acelist;
};
struct afs_iob {
char *in, *out;
uint16_t in_size, out_size;
};
static bool init_afs_acl(struct afs_acl *acl)
{
ZERO_STRUCT(*acl);
acl->ctx = talloc_init("afs_acl");
if (acl->ctx == NULL) {
DEBUG(10, ("Could not init afs_acl"));
return false;
}
return true;
}
static void free_afs_acl(struct afs_acl *acl)
{
if (acl->ctx != NULL)
talloc_destroy(acl->ctx);
acl->ctx = NULL;
acl->num_aces = 0;
acl->acelist = NULL;
}
static struct afs_ace *clone_afs_ace(TALLOC_CTX *mem_ctx, struct afs_ace *ace)
{
struct afs_ace *result = talloc(mem_ctx, struct afs_ace);
if (result == NULL)
return NULL;
*result = *ace;
result->next = NULL;
result->name = talloc_strdup(mem_ctx, ace->name);
if (result->name == NULL) {
return NULL;
}
return result;
}
static struct afs_ace *new_afs_ace(TALLOC_CTX *mem_ctx,
bool positive,
const char *name, uint32_t rights)
{
struct dom_sid sid;
enum lsa_SidType type;
struct afs_ace *result;
if (strcmp(name, "system:administrators") == 0) {
sid_copy(&sid, &global_sid_Builtin_Administrators);
type = SID_NAME_ALIAS;
} else if (strcmp(name, "system:anyuser") == 0) {
sid_copy(&sid, &global_sid_World);
type = SID_NAME_ALIAS;
} else if (strcmp(name, "system:authuser") == 0) {
sid_copy(&sid, &global_sid_Authenticated_Users);
type = SID_NAME_WKN_GRP;
} else if (strcmp(name, "system:backup") == 0) {
sid_copy(&sid, &global_sid_Builtin_Backup_Operators);
type = SID_NAME_ALIAS;
} else if (sidpts) {
/* All PTS users/groups are expressed as SIDs */
sid_copy(&sid, &global_sid_NULL);
type = SID_NAME_UNKNOWN;
if (string_to_sid(&sid, name)) {
const char *user, *domain;
/* We have to find the type, look up the SID */
lookup_sid(talloc_tos(), &sid,
&domain, &user, &type);
}
} else {
const char *domain, *uname;
char *p;
p = strchr_m(name, *lp_winbind_separator());
if (p != NULL) {
*p = '\\';
}
if (!lookup_name(talloc_tos(), name, LOOKUP_NAME_ALL,
&domain, &uname, &sid, &type)) {
DEBUG(10, ("Could not find AFS user %s\n", name));
sid_copy(&sid, &global_sid_NULL);
type = SID_NAME_UNKNOWN;
}
}
result = talloc(mem_ctx, struct afs_ace);
if (result == NULL) {
DEBUG(0, ("Could not talloc AFS ace\n"));
return NULL;
}
result->name = talloc_strdup(mem_ctx, name);
if (result->name == NULL) {
DEBUG(0, ("Could not talloc AFS ace name\n"));
return NULL;
}
result->sid = sid;
result->type = type;
result->positive = positive;
result->rights = rights;
return result;
}
static void add_afs_ace(struct afs_acl *acl,
bool positive,
const char *name, uint32_t rights)
{
struct afs_ace *ace;
for (ace = acl->acelist; ace != NULL; ace = ace->next) {
if ((ace->positive == positive) &&
(strequal(ace->name, name))) {
ace->rights |= rights;
return;
}
}
ace = new_afs_ace(acl->ctx, positive, name, rights);
ace->next = acl->acelist;
acl->acelist = ace;
acl->num_aces += 1;
DEBUG(10, ("add_afs_ace: Added %s entry for %s with rights %d\n",
ace->positive?"positive":"negative",
ace->name, ace->rights));
}
/* AFS ACLs in string form are a long string of fields delimited with \n.
*
* First line: Number of positive entries
* Second line: Number of negative entries
* Third and following lines: The entries themselves
*
* An ACE is a line of two fields, delimited by \t.
*
* First field: Name
* Second field: Rights
*/
static bool parse_afs_acl(struct afs_acl *acl, const char *acl_str)
{
int nplus, nminus;
int aces;
char str[MAXSIZE];
char *p = str;
strlcpy(str, acl_str, MAXSIZE);
if (sscanf(p, "%d", &nplus) != 1)
return false;
DEBUG(10, ("Found %d positive entries\n", nplus));
if ((p = strchr(p, '\n')) == NULL)
return false;
p += 1;
if (sscanf(p, "%d", &nminus) != 1)
return false;
DEBUG(10, ("Found %d negative entries\n", nminus));
if ((p = strchr(p, '\n')) == NULL)
return false;
p += 1;
for (aces = nplus+nminus; aces > 0; aces--)
{
const char *namep;
fstring name;
uint32_t rights;
char *space;
namep = p;
if ((p = strchr(p, '\t')) == NULL)
return false;
*p = '\0';
p += 1;
if (sscanf(p, "%d", &rights) != 1)
return false;
if ((p = strchr(p, '\n')) == NULL)
return false;
p += 1;
fstrcpy(name, namep);
while ((space = strchr_m(name, space_replacement)) != NULL)
*space = ' ';
add_afs_ace(acl, nplus>0, name, rights);
nplus -= 1;
}
return true;
}
static bool unparse_afs_acl(struct afs_acl *acl, char *acl_str)
{
/* TODO: String length checks!!!! */
int positives = 0;
int negatives = 0;
fstring line;
struct afs_ace *ace = acl->acelist;
*acl_str = 0;
while (ace != NULL) {
if (ace->positive)
positives++;
else
negatives++;
ace = ace->next;
}
fstr_sprintf(line, "%d\n", positives);
2012-03-30 04:13:07 +04:00
if (strlcat(acl_str, line, MAXSIZE) >= MAXSIZE) {
return false;
}
fstr_sprintf(line, "%d\n", negatives);
2012-03-30 04:13:07 +04:00
if (strlcat(acl_str, line, MAXSIZE) >= MAXSIZE) {
return false;
}
ace = acl->acelist;
while (ace != NULL) {
fstr_sprintf(line, "%s\t%d\n", ace->name, ace->rights);
2012-03-30 04:13:07 +04:00
if (strlcat(acl_str, line, MAXSIZE) >= MAXSIZE) {
return false;
}
ace = ace->next;
}
return true;
}
static uint32_t afs_to_nt_file_rights(uint32_t rights)
{
uint32_t result = 0;
if (rights & PRSFS_READ)
result |= FILE_READ_DATA | FILE_READ_EA |
FILE_EXECUTE | FILE_READ_ATTRIBUTES |
READ_CONTROL_ACCESS | SYNCHRONIZE_ACCESS;
if (rights & PRSFS_WRITE)
result |= FILE_WRITE_DATA | FILE_WRITE_ATTRIBUTES |
FILE_WRITE_EA | FILE_APPEND_DATA;
if (rights & PRSFS_LOCK)
result |= WRITE_OWNER_ACCESS;
if (rights & PRSFS_DELETE)
result |= DELETE_ACCESS;
return result;
}
static void afs_to_nt_dir_rights(uint32_t afs_rights, uint32_t *nt_rights,
uint8_t *flag)
{
*nt_rights = 0;
*flag = SEC_ACE_FLAG_OBJECT_INHERIT |
SEC_ACE_FLAG_CONTAINER_INHERIT;
if (afs_rights & PRSFS_INSERT)
*nt_rights |= FILE_ADD_FILE | FILE_ADD_SUBDIRECTORY;
if (afs_rights & PRSFS_LOOKUP)
*nt_rights |= FILE_READ_DATA | FILE_READ_EA |
FILE_EXECUTE | FILE_READ_ATTRIBUTES |
READ_CONTROL_ACCESS | SYNCHRONIZE_ACCESS;
if (afs_rights & PRSFS_WRITE)
*nt_rights |= FILE_WRITE_ATTRIBUTES | FILE_WRITE_DATA |
FILE_APPEND_DATA | FILE_WRITE_EA;
if ((afs_rights & (PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE)) ==
(PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE))
*nt_rights |= FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA |
GENERIC_WRITE_ACCESS;
if (afs_rights & PRSFS_DELETE)
*nt_rights |= DELETE_ACCESS;
if (afs_rights & PRSFS_ADMINISTER)
*nt_rights |= FILE_DELETE_CHILD | WRITE_DAC_ACCESS |
WRITE_OWNER_ACCESS;
if ( (afs_rights & PRSFS_LOOKUP) ==
(afs_rights & (PRSFS_LOOKUP|PRSFS_READ)) ) {
/* Only lookup right */
*flag = SEC_ACE_FLAG_CONTAINER_INHERIT;
}
}
#define AFS_FILE_RIGHTS (PRSFS_READ|PRSFS_WRITE|PRSFS_LOCK)
#define AFS_DIR_RIGHTS (PRSFS_INSERT|PRSFS_LOOKUP|PRSFS_DELETE|PRSFS_ADMINISTER)
static void split_afs_acl(struct afs_acl *acl,
struct afs_acl *dir_acl,
struct afs_acl *file_acl)
{
struct afs_ace *ace;
init_afs_acl(dir_acl);
init_afs_acl(file_acl);
for (ace = acl->acelist; ace != NULL; ace = ace->next) {
if (ace->rights & AFS_FILE_RIGHTS) {
add_afs_ace(file_acl, ace->positive, ace->name,
ace->rights & AFS_FILE_RIGHTS);
}
if (ace->rights & AFS_DIR_RIGHTS) {
add_afs_ace(dir_acl, ace->positive, ace->name,
ace->rights & AFS_DIR_RIGHTS);
}
}
}
static bool same_principal(struct afs_ace *x, struct afs_ace *y)
{
return ( (x->positive == y->positive) &&
(dom_sid_compare(&x->sid, &y->sid) == 0) );
}
static void merge_afs_acls(struct afs_acl *dir_acl,
struct afs_acl *file_acl,
struct afs_acl *target)
{
struct afs_ace *ace;
init_afs_acl(target);
for (ace = dir_acl->acelist; ace != NULL; ace = ace->next) {
struct afs_ace *file_ace;
bool found = false;
for (file_ace = file_acl->acelist;
file_ace != NULL;
file_ace = file_ace->next) {
if (!same_principal(ace, file_ace))
continue;
add_afs_ace(target, ace->positive, ace->name,
ace->rights | file_ace->rights);
found = true;
break;
}
if (!found)
add_afs_ace(target, ace->positive, ace->name,
ace->rights);
}
for (ace = file_acl->acelist; ace != NULL; ace = ace->next) {
struct afs_ace *dir_ace;
bool already_seen = false;
for (dir_ace = dir_acl->acelist;
dir_ace != NULL;
dir_ace = dir_ace->next) {
if (!same_principal(ace, dir_ace))
continue;
already_seen = true;
break;
}
if (!already_seen)
add_afs_ace(target, ace->positive, ace->name,
ace->rights);
}
}
#define PERMS_READ 0x001200a9
#define PERMS_CHANGE 0x001301bf
#define PERMS_FULL 0x001f01ff
static struct static_dir_ace_mapping {
uint8_t type;
uint8_t flags;
uint32_t mask;
uint32_t afs_rights;
} ace_mappings[] = {
/* Full control */
{ 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
PERMS_FULL, 127 /* rlidwka */ },
/* Change (write) */
{ 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
PERMS_CHANGE, 63 /* rlidwk */ },
/* Read (including list folder content) */
{ 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
PERMS_READ, 9 /* rl */ },
/* Read without list folder content -- same as "l" */
{ 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT,
0x00120089, 8 /* l */ },
/* some stupid workaround for preventing fallbacks */
{ 0, 0x3, 0x0012019F, 9 /* rl */ },
{ 0, 0x13, PERMS_FULL, 127 /* full */ },
/* read, delete and execute access plus synchronize */
{ 0, 0x3, 0x001300A9, 9 /* should be rdl, set to rl */},
/* classical read list */
{ 0, 0x13, 0x001200A9, 9 /* rl */},
/* almost full control, no delete */
{ 0, 0x13, PERMS_CHANGE, 63 /* rwidlk */},
/* List folder */
{ 0, SEC_ACE_FLAG_CONTAINER_INHERIT,
PERMS_READ, 8 /* l */ },
/* FULL without inheritance -- in all cases here we also get
the corresponding INHERIT_ONLY ACE in the same ACL */
{ 0, 0, PERMS_FULL, 127 /* rlidwka */ },
/* FULL inherit only -- counterpart to previous one */
{ 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY,
PERMS_FULL | SEC_GENERIC_WRITE, 127 /* rlidwka */ },
/* CHANGE without inheritance -- in all cases here we also get
the corresponding INHERIT_ONLY ACE in the same ACL */
{ 0, 0, PERMS_CHANGE, 63 /* rlidwk */ },
/* CHANGE inherit only -- counterpart to previous one */
{ 0, SEC_ACE_FLAG_OBJECT_INHERIT|SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_INHERIT_ONLY,
PERMS_CHANGE | SEC_GENERIC_WRITE, 63 /* rlidwk */ },
/* End marker, hopefully there's no afs right 9999 :-) */
{ 0, 0, 0, 9999 }
};
static uint32_t nt_to_afs_dir_rights(const char *filename, const struct security_ace *ace)
{
uint32_t result = 0;
uint32_t rights = ace->access_mask;
uint8_t flags = ace->flags;
struct static_dir_ace_mapping *m;
for (m = &ace_mappings[0]; m->afs_rights != 9999; m++) {
if ( (ace->type == m->type) &&
(ace->flags == m->flags) &&
(ace->access_mask == m->mask) )
return m->afs_rights;
}
DEBUG(1, ("AFSACL FALLBACK: 0x%X 0x%X 0x%X %s %X\n",
ace->type, ace->flags, ace->access_mask, filename, rights));
if (rights & (GENERIC_ALL_ACCESS|WRITE_DAC_ACCESS)) {
result |= PRSFS_READ | PRSFS_WRITE | PRSFS_INSERT |
PRSFS_LOOKUP | PRSFS_DELETE | PRSFS_LOCK |
PRSFS_ADMINISTER;
}
if (rights & (GENERIC_READ_ACCESS|FILE_READ_DATA)) {
result |= PRSFS_LOOKUP;
if (flags & SEC_ACE_FLAG_OBJECT_INHERIT) {
result |= PRSFS_READ;
}
}
if (rights & (GENERIC_WRITE_ACCESS|FILE_WRITE_DATA)) {
result |= PRSFS_INSERT | PRSFS_DELETE;
if (flags & SEC_ACE_FLAG_OBJECT_INHERIT) {
result |= PRSFS_WRITE | PRSFS_LOCK;
}
}
return result;
}
static uint32_t nt_to_afs_file_rights(const char *filename, const struct security_ace *ace)
{
uint32_t result = 0;
uint32_t rights = ace->access_mask;
if (rights & (GENERIC_READ_ACCESS|FILE_READ_DATA)) {
result |= PRSFS_READ;
}
if (rights & (GENERIC_WRITE_ACCESS|FILE_WRITE_DATA)) {
result |= PRSFS_WRITE | PRSFS_LOCK;
}
return result;
}
static size_t afs_to_nt_acl_common(struct afs_acl *afs_acl,
SMB_STRUCT_STAT *psbuf,
uint32_t security_info,
TALLOC_CTX *mem_ctx,
struct security_descriptor **ppdesc)
{
struct security_ace *nt_ace_list;
struct dom_sid owner_sid, group_sid;
struct security_acl *psa = NULL;
int good_aces;
size_t sd_size;
struct afs_ace *afs_ace;
uid_to_sid(&owner_sid, psbuf->st_ex_uid);
gid_to_sid(&group_sid, psbuf->st_ex_gid);
if (afs_acl->num_aces) {
nt_ace_list = talloc_array(mem_ctx, struct security_ace, afs_acl->num_aces);
if (nt_ace_list == NULL)
return 0;
} else {
nt_ace_list = NULL;
}
afs_ace = afs_acl->acelist;
good_aces = 0;
while (afs_ace != NULL) {
uint32_t nt_rights;
uint8_t flag = SEC_ACE_FLAG_OBJECT_INHERIT |
SEC_ACE_FLAG_CONTAINER_INHERIT;
if (afs_ace->type == SID_NAME_UNKNOWN) {
DEBUG(10, ("Ignoring unknown name %s\n",
afs_ace->name));
afs_ace = afs_ace->next;
continue;
}
if (S_ISDIR(psbuf->st_ex_mode))
afs_to_nt_dir_rights(afs_ace->rights, &nt_rights,
&flag);
else
nt_rights = afs_to_nt_file_rights(afs_ace->rights);
init_sec_ace(&nt_ace_list[good_aces++], &(afs_ace->sid),
SEC_ACE_TYPE_ACCESS_ALLOWED, nt_rights, flag);
afs_ace = afs_ace->next;
}
psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION,
good_aces, nt_ace_list);
if (psa == NULL)
return 0;
*ppdesc = make_sec_desc(mem_ctx, SD_REVISION,
SEC_DESC_SELF_RELATIVE,
(security_info & SECINFO_OWNER)
? &owner_sid : NULL,
(security_info & SECINFO_GROUP)
? &group_sid : NULL,
NULL, psa, &sd_size);
return sd_size;
}
static size_t afs_to_nt_acl(struct afs_acl *afs_acl,
struct connection_struct *conn,
struct smb_filename *smb_fname,
uint32_t security_info,
TALLOC_CTX *mem_ctx,
struct security_descriptor **ppdesc)
{
int ret;
/*
* We can directly use SMB_VFS_STAT here, as if this was a
* POSIX call on a symlink, we've already refused it.
* For a Windows acl mapped call on a symlink, we want to follow
* it.
*/
/* Get the stat struct for the owner info. */
ret = SMB_VFS_STAT(conn, smb_fname);
if (ret == -1) {
return 0;
}
return afs_to_nt_acl_common(afs_acl, &smb_fname->st, security_info,
mem_ctx, ppdesc);
}
static size_t afs_fto_nt_acl(struct afs_acl *afs_acl,
struct files_struct *fsp,
uint32_t security_info,
TALLOC_CTX *mem_ctx,
struct security_descriptor **ppdesc)
{
SMB_STRUCT_STAT sbuf;
if (fsp->fh->fd == -1) {
/* Get the stat struct for the owner info. */
return afs_to_nt_acl(afs_acl, fsp->conn, fsp->fsp_name,
security_info, mem_ctx, ppdesc);
}
if(SMB_VFS_FSTAT(fsp, &sbuf) != 0) {
return 0;
}
return afs_to_nt_acl_common(afs_acl, &sbuf, security_info,
mem_ctx, ppdesc);
}
static bool mappable_sid(const struct dom_sid *sid)
{
struct dom_sid domain_sid;
if (dom_sid_compare(sid, &global_sid_Builtin_Administrators) == 0)
return true;
if (dom_sid_compare(sid, &global_sid_World) == 0)
return true;
if (dom_sid_compare(sid, &global_sid_Authenticated_Users) == 0)
return true;
if (dom_sid_compare(sid, &global_sid_Builtin_Backup_Operators) == 0)
return true;
string_to_sid(&domain_sid, "S-1-5-21");
if (sid_compare_domain(sid, &domain_sid) == 0)
return true;
return false;
}
static bool nt_to_afs_acl(const char *filename,
uint32_t security_info_sent,
const struct security_descriptor *psd,
uint32_t (*nt_to_afs_rights)(const char *filename,
const struct security_ace *ace),
struct afs_acl *afs_acl)
{
const struct security_acl *dacl;
int i;
/* Currently we *only* look at the dacl */
if (((security_info_sent & SECINFO_DACL) == 0) ||
(psd->dacl == NULL))
return true;
if (!init_afs_acl(afs_acl))
return false;
dacl = psd->dacl;
for (i = 0; i < dacl->num_aces; i++) {
const struct security_ace *ace = &(dacl->aces[i]);
const char *dom_name, *name;
enum lsa_SidType name_type;
char *p;
if (ace->type != SEC_ACE_TYPE_ACCESS_ALLOWED) {
/* First cut: Only positive ACEs */
return false;
}
if (!mappable_sid(&ace->trustee)) {
DEBUG(10, ("Ignoring unmappable SID %s\n",
sid_string_dbg(&ace->trustee)));
continue;
}
if (dom_sid_compare(&ace->trustee,
&global_sid_Builtin_Administrators) == 0) {
name = "system:administrators";
} else if (dom_sid_compare(&ace->trustee,
&global_sid_World) == 0) {
name = "system:anyuser";
} else if (dom_sid_compare(&ace->trustee,
&global_sid_Authenticated_Users) == 0) {
name = "system:authuser";
} else if (dom_sid_compare(&ace->trustee,
&global_sid_Builtin_Backup_Operators)
== 0) {
name = "system:backup";
} else {
if (!lookup_sid(talloc_tos(), &ace->trustee,
&dom_name, &name, &name_type)) {
DEBUG(1, ("AFSACL: Could not lookup SID %s on file %s\n",
sid_string_dbg(&ace->trustee),
filename));
continue;
}
if ( (name_type == SID_NAME_USER) ||
(name_type == SID_NAME_DOM_GRP) ||
(name_type == SID_NAME_ALIAS) ) {
char *tmp;
tmp = talloc_asprintf(talloc_tos(), "%s%s%s",
dom_name, lp_winbind_separator(),
name);
if (tmp == NULL) {
return false;
}
if (!strlower_m(tmp)) {
return false;
}
name = tmp;
}
if (sidpts) {
/* Expect all users/groups in pts as SIDs */
name = talloc_strdup(
talloc_tos(),
sid_string_tos(&ace->trustee));
if (name == NULL) {
return false;
}
}
}
while ((p = strchr_m(name, ' ')) != NULL)
*p = space_replacement;
add_afs_ace(afs_acl, true, name,
nt_to_afs_rights(filename, ace));
}
return true;
}
static bool afs_get_afs_acl(const char *filename, struct afs_acl *acl)
{
struct afs_iob iob;
int ret;
char space[MAXSIZE];
DEBUG(5, ("afs_get_afs_acl: %s\n", filename));
iob.in_size = 0;
iob.out_size = MAXSIZE;
iob.in = iob.out = space;
ret = afs_syscall(AFSCALL_PIOCTL, filename, VIOCGETAL,
(char *)&iob, 0);
if (ret) {
DEBUG(1, ("got error from PIOCTL: %d\n", ret));
return false;
}
if (!init_afs_acl(acl))
return false;
if (!parse_afs_acl(acl, space)) {
DEBUG(1, ("Could not parse AFS acl\n"));
free_afs_acl(acl);
return false;
}
return true;
}
/* For setting an AFS ACL we have to take care of the ACEs we could
* not properly map to SIDs. Merge all of them into the new ACL. */
static void merge_unknown_aces(struct afs_acl *src, struct afs_acl *dst)
{
struct afs_ace *ace;
for (ace = src->acelist; ace != NULL; ace = ace->next)
{
struct afs_ace *copy;
if (ace->type != SID_NAME_UNKNOWN) {
DEBUG(10, ("Not merging known ACE for %s\n",
ace->name));
continue;
}
DEBUG(10, ("Merging unknown ACE for %s\n", ace->name));
copy = clone_afs_ace(dst->ctx, ace);
if (copy == NULL) {
DEBUG(0, ("Could not clone ACE for %s\n", ace->name));
continue;
}
copy->next = dst->acelist;
dst->acelist = copy;
dst->num_aces += 1;
}
}
static NTSTATUS afs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp,
uint32_t security_info_sent,
const struct security_descriptor *psd)
{
struct afs_acl old_afs_acl, new_afs_acl;
struct afs_acl dir_acl, file_acl;
char acl_string[MAXSIZE];
struct afs_iob iob;
int ret = -1;
char *name = NULL;
const char *fileacls;
fileacls = lp_parm_const_string(SNUM(handle->conn), "afsacl", "fileacls",
"yes");
sidpts = lp_parm_bool(SNUM(handle->conn), "afsacl", "sidpts", false);
ZERO_STRUCT(old_afs_acl);
ZERO_STRUCT(new_afs_acl);
ZERO_STRUCT(dir_acl);
ZERO_STRUCT(file_acl);
name = talloc_strdup(talloc_tos(), fsp->fsp_name->base_name);
if (!name) {
return NT_STATUS_NO_MEMORY;
}
if (!fsp->is_directory) {
/* We need to get the name of the directory containing the
* file, this is where the AFS acls live */
char *p = strrchr(name, '/');
if (p != NULL) {
*p = '\0';
} else {
name = talloc_strdup(talloc_tos(), ".");
if (!name) {
return NT_STATUS_NO_MEMORY;
}
}
}
if (!afs_get_afs_acl(name, &old_afs_acl)) {
DEBUG(3, ("Could not get old ACL of %s\n", fsp_str_dbg(fsp)));
goto done;
}
split_afs_acl(&old_afs_acl, &dir_acl, &file_acl);
if (fsp->is_directory) {
if (!strequal(fileacls, "yes")) {
/* Throw away file acls, we depend on the
* inheritance ACEs that also give us file
* permissions */
free_afs_acl(&file_acl);
}
free_afs_acl(&dir_acl);
if (!nt_to_afs_acl(fsp->fsp_name->base_name,
security_info_sent, psd,
nt_to_afs_dir_rights, &dir_acl))
goto done;
} else {
if (strequal(fileacls, "no")) {
ret = -1;
goto done;
}
if (strequal(fileacls, "ignore")) {
ret = 0;
goto done;
}
free_afs_acl(&file_acl);
if (!nt_to_afs_acl(fsp->fsp_name->base_name,
security_info_sent, psd,
nt_to_afs_file_rights, &file_acl))
goto done;
}
merge_afs_acls(&dir_acl, &file_acl, &new_afs_acl);
merge_unknown_aces(&old_afs_acl, &new_afs_acl);
unparse_afs_acl(&new_afs_acl, acl_string);
iob.in = acl_string;
iob.in_size = 1+strlen(iob.in);
iob.out = NULL;
iob.out_size = 0;
DEBUG(10, ("trying to set acl '%s' on file %s\n", iob.in, name));
ret = afs_syscall(AFSCALL_PIOCTL, name, VIOCSETAL, (char *)&iob, 0);
if (ret != 0) {
DEBUG(10, ("VIOCSETAL returned %d\n", ret));
}
done:
free_afs_acl(&dir_acl);
free_afs_acl(&file_acl);
free_afs_acl(&old_afs_acl);
free_afs_acl(&new_afs_acl);
return (ret == 0) ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
}
static NTSTATUS afsacl_fget_nt_acl(struct vfs_handle_struct *handle,
struct files_struct *fsp,
uint32_t security_info,
TALLOC_CTX *mem_ctx,
struct security_descriptor **ppdesc)
{
struct afs_acl acl;
size_t sd_size;
DEBUG(5, ("afsacl_fget_nt_acl: %s\n", fsp_str_dbg(fsp)));
sidpts = lp_parm_bool(SNUM(fsp->conn), "afsacl", "sidpts", false);
if (!afs_get_afs_acl(fsp->fsp_name->base_name, &acl)) {
return NT_STATUS_ACCESS_DENIED;
}
sd_size = afs_fto_nt_acl(&acl, fsp, security_info, mem_ctx, ppdesc);
free_afs_acl(&acl);
return (sd_size != 0) ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
}
static NTSTATUS afsacl_get_nt_acl(struct vfs_handle_struct *handle,
const struct smb_filename *smb_fname,
uint32_t security_info,
TALLOC_CTX *mem_ctx,
struct security_descriptor **ppdesc)
{
struct afs_acl acl;
size_t sd_size;
DEBUG(5, ("afsacl_get_nt_acl: %s\n", smb_fname->base_name));
sidpts = lp_parm_bool(SNUM(handle->conn), "afsacl", "sidpts", false);
if (!afs_get_afs_acl(smb_fname->base_name, &acl)) {
return NT_STATUS_ACCESS_DENIED;
}
sd_size = afs_to_nt_acl(&acl, handle->conn, smb_fname, security_info,
mem_ctx, ppdesc);
free_afs_acl(&acl);
return (sd_size != 0) ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
}
static NTSTATUS afsacl_fset_nt_acl(vfs_handle_struct *handle,
files_struct *fsp,
uint32_t security_info_sent,
const struct security_descriptor *psd)
{
return afs_set_nt_acl(handle, fsp, security_info_sent, psd);
}
static int afsacl_connect(vfs_handle_struct *handle,
const char *service,
const char *user)
{
const char *spc;
int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
if (ret < 0) {
return ret;
}
spc = lp_parm_const_string(SNUM(handle->conn), "afsacl", "space", "%");
if (spc != NULL)
space_replacement = spc[0];
return 0;
}
/* We don't have a linear form of the AFS ACL yet */
static int afsacl_sys_acl_blob_get_file(vfs_handle_struct *handle, const char *path_p, TALLOC_CTX *mem_ctx, char **blob_description, DATA_BLOB *blob)
{
errno = ENOSYS;
return -1;
}
/* We don't have a linear form of the AFS ACL yet */
static int afsacl_sys_acl_blob_get_fd(vfs_handle_struct *handle, files_struct *fsp, TALLOC_CTX *mem_ctx, char **blob_description, DATA_BLOB *blob)
{
errno = ENOSYS;
return -1;
}
2009-07-24 04:28:58 +04:00
static struct vfs_fn_pointers vfs_afsacl_fns = {
.connect_fn = afsacl_connect,
.fget_nt_acl_fn = afsacl_fget_nt_acl,
.get_nt_acl_fn = afsacl_get_nt_acl,
.fset_nt_acl_fn = afsacl_fset_nt_acl,
.sys_acl_blob_get_file_fn = afsacl_sys_acl_blob_get_file,
.sys_acl_blob_get_fd_fn = afsacl_sys_acl_blob_get_fd
};
NTSTATUS vfs_afsacl_init(TALLOC_CTX *);
NTSTATUS vfs_afsacl_init(TALLOC_CTX *ctx)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "afsacl",
2009-07-24 04:28:58 +04:00
&vfs_afsacl_fns);
}