mirror/openldap
2
0
Fork 0
mirror of https://git.openldap.org/openldap/openldap.git synced 2024-12-21 03:10:25 +08:00
Code Issues Packages Projects Releases Wiki Activity
b9254b8ab4
openldap/servers/slapd/acl.c
Kurt Zeilenga 3e3911247b Remove lint.
2002-04-22 23:03:33 +00:00

1975 lines
47 KiB
C
Raw Blame History

/* acl.c - routines to parse and check acl's */
/* $OpenLDAP$ */
/*
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <ac/regex.h>
#include <ac/socket.h>
#include <ac/string.h>
#include "slap.h"
#include "sets.h"
#include "lber_pvt.h"
#define ACL_BUF_SIZE 1024 /* use most appropriate size */
/*
* speed up compares
*/
static struct berval
aci_bv_entry = BER_BVC("entry"),
aci_bv_br_entry = BER_BVC("[entry]"),
aci_bv_br_all = BER_BVC("[all]"),
aci_bv_access_id = BER_BVC("access-id"),
aci_bv_anonymous = BER_BVC("anonymous"),
aci_bv_users = BER_BVC("users"),
aci_bv_self = BER_BVC("self"),
aci_bv_dnattr = BER_BVC("dnattr"),
aci_bv_group = BER_BVC("group"),
aci_bv_role = BER_BVC("role"),
aci_bv_set = BER_BVC("set"),
aci_bv_set_ref = BER_BVC("set-ref"),
aci_bv_grant = BER_BVC("grant"),
aci_bv_deny = BER_BVC("deny");
static AccessControl * acl_get(
AccessControl *ac, int *count,
Backend *be, Operation *op,
Entry *e,
AttributeDescription *desc,
int nmatches, regmatch_t *matches );
static slap_control_t acl_mask(
AccessControl *ac, slap_mask_t *mask,
Backend *be, Connection *conn, Operation *op,
Entry *e,
AttributeDescription *desc,
struct berval *val,
regmatch_t *matches,
int count,
AccessControlState *state );
#ifdef SLAPD_ACI_ENABLED
static int aci_mask(
Backend *be,
Connection *conn,
Operation *op,
Entry *e,
AttributeDescription *desc,
struct berval *val,
struct berval *aci,
regmatch_t *matches,
slap_access_t *grant,
slap_access_t *deny );
#endif
static int regex_matches(
struct berval *pat, char *str, char *buf, regmatch_t *matches);
static void string_expand(
struct berval *newbuf, struct berval *pattern,
char *match, regmatch_t *matches);
typedef struct AciSetCookie {
Backend *be;
Entry *e;
Connection *conn;
Operation *op;
} AciSetCookie;
SLAP_SET_GATHER aci_set_gather;
static int aci_match_set ( struct berval *subj, Backend *be,
Entry *e, Connection *conn, Operation *op, int setref );
/*
* access_allowed - check whether op->o_ndn is allowed the requested access
* to entry e, attribute attr, value val. if val is null, access to
* the whole attribute is assumed (all values).
*
* This routine loops through all access controls and calls
* acl_mask() on each applicable access control.
* The loop exits when a definitive answer is reached or
* or no more controls remain.
*
* returns:
* 0 access denied
* 1 access granted
*/
int
access_allowed(
Backend *be,
Connection *conn,
Operation *op,
Entry *e,
AttributeDescription *desc,
struct berval *val,
slap_access_t access,
AccessControlState *state )
{
int ret = 1;
int count;
AccessControl *a;
#ifdef LDAP_DEBUG
char accessmaskbuf[ACCESSMASK_MAXLEN];
#endif
slap_mask_t mask;
slap_control_t control;
const char *attr;
regmatch_t matches[MAXREMATCHES];
assert( e != NULL );
assert( desc != NULL );
assert( access > ACL_NONE );
attr = desc->ad_cname.bv_val;
assert( attr != NULL );
if( state && state->as_recorded ) {
if( state->as_recorded & ACL_STATE_RECORDED_NV &&
val == NULL )
{
return state->as_result;
} else if ( state->as_recorded & ACL_STATE_RECORDED_VD &&
val != NULL && state->as_vd_acl == NULL )
{
return state->as_result;
}
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
"access_allowed: conn %lu %s access to \"%s\" \"%s\" requested\n",
conn ? conn->c_connid : -1, access2str( access ), e->e_dn, attr ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: %s access to \"%s\" \"%s\" requested\n",
access2str( access ), e->e_dn, attr );
#endif
if ( op == NULL ) {
/* no-op call */
goto done;
}
if ( be == NULL ) be = &backends[0];
assert( be != NULL );
/* grant database root access */
if ( be != NULL && be_isroot( be, &op->o_ndn ) ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_INFO,
"access_allowed: conn %lu root access granted\n",
conn->c_connid));
#else
Debug( LDAP_DEBUG_ACL,
"<= root access granted\n",
0, 0, 0 );
#endif
goto done;
}
/*
* no-user-modification operational attributes are ignored
* by ACL_WRITE checking as any found here are not provided
* by the user
*/
if ( access >= ACL_WRITE && is_at_no_user_mod( desc->ad_type )
&& desc != slap_schema.si_ad_entry
&& desc != slap_schema.si_ad_children )
{
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"access_allowed: conn %lu NoUserMod Operational attribute: %s access granted\n",
conn->c_connid, attr ));
#else
Debug( LDAP_DEBUG_ACL, "NoUserMod Operational attribute:"
" %s access granted\n",
attr, 0, 0 );
#endif
goto done;
}
/* use backend default access if no backend acls */
if( be != NULL && be->be_acl == NULL ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"access_allowed: conn %lu backend default %s access %s to \"%s\"\n",
conn->c_connid, access2str( access ),
be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: backend default %s access %s to \"%s\"\n",
access2str( access ),
be->be_dfltaccess >= access ? "granted" : "denied", op->o_dn.bv_val );
#endif
ret = be->be_dfltaccess >= access;
goto done;
#ifdef notdef
/* be is always non-NULL */
/* use global default access if no global acls */
} else if ( be == NULL && global_acl == NULL ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"access_allowed: conn %lu global default %s access %s to \"%s\"\n",
conn->c_connid, access2str( access ),
global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: global default %s access %s to \"%s\"\n",
access2str( access ),
global_default_access >= access ? "granted" : "denied", op->o_dn.bv_val );
#endif
ret = global_default_access >= access;
goto done;
#endif
}
ret = 0;
control = ACL_BREAK;
if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD )) {
assert( state->as_vd_acl != NULL );
a = state->as_vd_acl;
mask = state->as_vd_acl_mask;
count = state->as_vd_acl_count;
AC_MEMCPY( matches, state->as_vd_acl_matches,
sizeof(matches) );
goto vd_access;
} else {
a = NULL;
ACL_INIT(mask);
count = 0;
memset(matches, '\0', sizeof(matches));
}
while((a = acl_get( a, &count, be, op, e, desc,
MAXREMATCHES, matches )) != NULL)
{
int i;
for (i = 0; i < MAXREMATCHES && matches[i].rm_so > 0; i++) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"access_allowed: conn %lu match[%d]: %d %d ",
conn->c_connid, i,
(int)matches[i].rm_so, (int)matches[i].rm_eo ));
#else
Debug( LDAP_DEBUG_ACL, "=> match[%d]: %d %d ", i,
(int)matches[i].rm_so, (int)matches[i].rm_eo );
#endif
if( matches[i].rm_so <= matches[0].rm_eo ) {
int n;
for ( n = matches[i].rm_so; n < matches[i].rm_eo; n++) {
Debug( LDAP_DEBUG_ACL, "%c", e->e_ndn[n], 0, 0 );
}
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_ARGS, "\n" ));
#else
Debug( LDAP_DEBUG_ARGS, "\n", 0, 0, 0 );
#endif
}
vd_access:
control = acl_mask( a, &mask, be, conn, op,
e, desc, val, matches, count, state );
if ( control != ACL_BREAK ) {
break;
}
memset(matches, '\0', sizeof(matches));
}
if ( ACL_IS_INVALID( mask ) ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"access_allowed: conn %lu \"%s\" (%s) invalid!\n",
conn->c_connid, e->e_dn, attr ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: \"%s\" (%s) invalid!\n",
e->e_dn, attr, 0 );
#endif
ACL_INIT(mask);
} else if ( control == ACL_BREAK ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"access_allowed: conn %lu no more rules\n",
conn->c_connid ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: no more rules\n", 0, 0, 0);
#endif
goto done;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
"access_allowed: conn %lu %s access %s by %s\n",
conn->c_connid,
access2str( access ),
ACL_GRANT( mask, access ) ? "granted" : "denied",
accessmask2str( mask, accessmaskbuf ) ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: %s access %s by %s\n",
access2str( access ),
ACL_GRANT(mask, access) ? "granted" : "denied",
accessmask2str( mask, accessmaskbuf ) );
#endif
ret = ACL_GRANT(mask, access);
done:
if( state != NULL ) {
state->as_recorded |= ACL_STATE_RECORDED;
state->as_result = ret;
}
return ret;
}
/*
* acl_get - return the acl applicable to entry e, attribute
* attr. the acl returned is suitable for use in subsequent calls to
* acl_access_allowed().
*/
static AccessControl *
acl_get(
AccessControl *a,
int *count,
Backend *be,
Operation *op,
Entry *e,
AttributeDescription *desc,
int nmatch,
regmatch_t *matches )
{
const char *attr;
int dnlen, patlen;
assert( e != NULL );
assert( count != NULL );
assert( desc != NULL );
attr = desc->ad_cname.bv_val;
assert( attr != NULL );
if( a == NULL ) {
if( be == NULL ) {
a = global_acl;
} else {
a = be->be_acl;
}
assert( a != NULL );
} else {
a = a->acl_next;
}
dnlen = e->e_nname.bv_len;
for ( ; a != NULL; a = a->acl_next ) {
(*count) ++;
if (a->acl_dn_pat.bv_len != 0) {
if ( a->acl_dn_style == ACL_STYLE_REGEX ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_get: dnpat [%d] %s nsub: %d\n",
*count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub ));
#else
Debug( LDAP_DEBUG_ACL, "=> dnpat: [%d] %s nsub: %d\n",
*count, a->acl_dn_pat.bv_val, (int) a->acl_dn_re.re_nsub );
#endif
if (regexec(&a->acl_dn_re, e->e_ndn, nmatch, matches, 0))
continue;
} else {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_get: dn [%d] %s\n",
*count, a->acl_dn_pat.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "=> dn: [%d] %s\n",
*count, a->acl_dn_pat.bv_val, 0 );
#endif
patlen = a->acl_dn_pat.bv_len;
if ( dnlen < patlen )
continue;
if ( a->acl_dn_style == ACL_STYLE_BASE ) {
/* base dn -- entire object DN must match */
if ( dnlen != patlen )
continue;
} else if ( a->acl_dn_style == ACL_STYLE_ONE ) {
int rdnlen = -1;
if ( dnlen <= patlen )
continue;
if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
continue;
rdnlen = dn_rdnlen( NULL, &e->e_nname );
if ( rdnlen != dnlen - patlen - 1 )
continue;
} else if ( a->acl_dn_style == ACL_STYLE_SUBTREE ) {
if ( dnlen > patlen && !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
continue;
} else if ( a->acl_dn_style == ACL_STYLE_CHILDREN ) {
if ( dnlen <= patlen )
continue;
if ( !DN_SEPARATOR( e->e_ndn[dnlen - patlen - 1] ) )
continue;
}
if ( strcmp( a->acl_dn_pat.bv_val, e->e_ndn + dnlen - patlen ) != 0 )
continue;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_get: [%d] matched\n",
*count ));
#else
Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] matched\n",
*count, 0, 0 );
#endif
}
if ( a->acl_filter != NULL ) {
ber_int_t rc = test_filter( NULL, NULL, NULL, e, a->acl_filter );
if ( rc != LDAP_COMPARE_TRUE ) {
continue;
}
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_get: [%d] check attr %s\n",
*count, attr ));
#else
Debug( LDAP_DEBUG_ACL, "=> acl_get: [%d] check attr %s\n",
*count, attr, 0);
#endif
if ( attr == NULL || a->acl_attrs == NULL ||
ad_inlist( desc, a->acl_attrs ) )
{
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_get: [%d] acl %s attr: %s\n",
*count, e->e_dn, attr ));
#else
Debug( LDAP_DEBUG_ACL,
"<= acl_get: [%d] acl %s attr: %s\n",
*count, e->e_dn, attr );
#endif
return a;
}
matches[0].rm_so = matches[0].rm_eo = -1;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
"acl_get: done.\n" ));
#else
Debug( LDAP_DEBUG_ACL, "<= acl_get: done.\n", 0, 0, 0 );
#endif
return( NULL );
}
/*
* Record value-dependent access control state
*/
#define ACL_RECORD_VALUE_STATE do { \
if( state && !( state->as_recorded & ACL_STATE_RECORDED_VD )) { \
state->as_recorded |= ACL_STATE_RECORDED_VD; \
state->as_vd_acl = a; \
AC_MEMCPY( state->as_vd_acl_matches, matches, \
sizeof( state->as_vd_acl_matches )) ; \
state->as_vd_acl_count = count; \
state->as_vd_access = b; \
state->as_vd_access_count = i; \
} \
} while( 0 )
/*
* acl_mask - modifies mask based upon the given acl and the
* requested access to entry e, attribute attr, value val. if val
* is null, access to the whole attribute is assumed (all values).
*
* returns 0 access NOT allowed
* 1 access allowed
*/
static slap_control_t
acl_mask(
AccessControl *a,
slap_mask_t *mask,
Backend *be,
Connection *conn,
Operation *op,
Entry *e,
AttributeDescription *desc,
struct berval *val,
regmatch_t *matches,
int count,
AccessControlState *state )
{
int i, odnlen, patlen;
Access *b;
#ifdef LDAP_DEBUG
char accessmaskbuf[ACCESSMASK_MAXLEN];
#endif
const char *attr;
assert( a != NULL );
assert( mask != NULL );
assert( desc != NULL );
attr = desc->ad_cname.bv_val;
assert( attr != NULL );
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_ENTRY,
"acl_mask: conn %lu access to entry \"%s\", attr \"%s\" requested\n",
conn->c_connid, e->e_dn, attr ));
LDAP_LOG(( "acl", LDAP_LEVEL_ARGS,
" to %s by \"%s\", (%s) \n",
val ? "value" : "all values",
op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
accessmask2str( *mask, accessmaskbuf ) ));
#else
Debug( LDAP_DEBUG_ACL,
"=> acl_mask: access to entry \"%s\", attr \"%s\" requested\n",
e->e_dn, attr, 0 );
Debug( LDAP_DEBUG_ACL,
"=> acl_mask: to %s by \"%s\", (%s) \n",
val ? "value" : "all values",
op->o_ndn.bv_val ? op->o_ndn.bv_val : "",
accessmask2str( *mask, accessmaskbuf ) );
#endif
if( state && ( state->as_recorded & ACL_STATE_RECORDED_VD )
&& state->as_vd_acl == a )
{
b = state->as_vd_access;
i = state->as_vd_access_count;
} else {
b = a->acl_access;
i = 1;
}
for ( ; b != NULL; b = b->a_next, i++ ) {
slap_mask_t oldmask, modmask;
ACL_INVALIDATE( modmask );
/* AND <who> clauses */
if ( b->a_dn_pat.bv_len != 0 ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_dn_pat: %s\n",
conn->c_connid, b->a_dn_pat.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_dn_pat: %s\n",
b->a_dn_pat.bv_val, 0, 0);
#endif
/*
* if access applies to the entry itself, and the
* user is bound as somebody in the same namespace as
* the entry, OR the given dn matches the dn pattern
*/
if ( ber_bvcmp( &b->a_dn_pat, &aci_bv_anonymous ) == 0 ) {
if ( op->o_ndn.bv_len != 0 ) {
continue;
}
} else if ( ber_bvcmp( &b->a_dn_pat, &aci_bv_users ) == 0 ) {
if ( op->o_ndn.bv_len == 0 ) {
continue;
}
} else if ( ber_bvcmp( &b->a_dn_pat, &aci_bv_self ) == 0 ) {
if ( op->o_ndn.bv_len == 0 ) {
continue;
}
if ( e->e_dn == NULL || !dn_match( &e->e_nname, &op->o_ndn ) ) {
continue;
}
} else if ( b->a_dn_style == ACL_STYLE_REGEX ) {
if ( !ber_bvccmp( &b->a_dn_pat, '*' ) ) {
int ret = regex_matches( &b->a_dn_pat,
op->o_ndn.bv_val, e->e_ndn, matches );
if( ret == 0 ) {
continue;
}
}
} else {
struct berval pat;
int got_match = 0;
if ( e->e_dn == NULL )
continue;
if ( b->a_dn_expand ) {
struct berval bv;
char buf[ACL_BUF_SIZE];
bv.bv_len = sizeof( buf ) - 1;
bv.bv_val = buf;
string_expand(&bv, &b->a_dn_pat,
e->e_ndn, matches);
if ( dnNormalize2(NULL, &bv, &pat) != LDAP_SUCCESS ) {
/* did not expand to a valid dn */
continue;
}
} else {
pat = b->a_dn_pat;
}
patlen = pat.bv_len;
odnlen = op->o_ndn.bv_len;
if ( odnlen < patlen ) {
goto dn_match_cleanup;
}
if ( b->a_dn_style == ACL_STYLE_BASE ) {
/* base dn -- entire object DN must match */
if ( odnlen != patlen ) {
goto dn_match_cleanup;
}
} else if ( b->a_dn_style == ACL_STYLE_ONE ) {
int rdnlen = -1;
if ( odnlen <= patlen ) {
goto dn_match_cleanup;
}
if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
goto dn_match_cleanup;
}
rdnlen = dn_rdnlen( NULL, &op->o_ndn );
if ( rdnlen != odnlen - patlen - 1 ) {
goto dn_match_cleanup;
}
} else if ( b->a_dn_style == ACL_STYLE_SUBTREE ) {
if ( odnlen > patlen && !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
goto dn_match_cleanup;
}
} else if ( b->a_dn_style == ACL_STYLE_CHILDREN ) {
if ( odnlen <= patlen ) {
goto dn_match_cleanup;
}
if ( !DN_SEPARATOR( op->o_ndn.bv_val[odnlen - patlen - 1] ) ) {
goto dn_match_cleanup;
}
}
got_match = !strcmp( pat.bv_val, op->o_ndn.bv_val + odnlen - patlen );
dn_match_cleanup:;
if ( pat.bv_val != b->a_dn_pat.bv_val ) {
free( pat.bv_val );
}
if ( !got_match ) {
continue;
}
}
}
if ( b->a_sockurl_pat.bv_len ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_sockurl_pat: %s\n",
conn->c_connid, b->a_sockurl_pat.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_sockurl_pat: %s\n",
b->a_sockurl_pat.bv_val, 0, 0 );
#endif
if ( !ber_bvccmp( &b->a_sockurl_pat, '*' ) ) {
if ( b->a_sockurl_style == ACL_STYLE_REGEX) {
if (!regex_matches( &b->a_sockurl_pat, conn->c_listener_url.bv_val,
e->e_ndn, matches ) )
{
continue;
}
} else {
if ( ber_bvstrcasecmp( &b->a_sockurl_pat, &conn->c_listener_url ) != 0 )
continue;
}
}
}
if ( b->a_domain_pat.bv_len ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_domain_pat: %s\n",
conn->c_connid, b->a_domain_pat.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_domain_pat: %s\n",
b->a_domain_pat.bv_val, 0, 0 );
#endif
if ( !ber_bvccmp( &b->a_domain_pat, '*' ) ) {
if ( b->a_domain_style == ACL_STYLE_REGEX) {
if (!regex_matches( &b->a_domain_pat, conn->c_peer_domain.bv_val,
e->e_ndn, matches ) )
{
continue;
}
} else {
char buf[ACL_BUF_SIZE];
struct berval cmp = conn->c_peer_domain;
struct berval pat = b->a_domain_pat;
if ( b->a_domain_expand ) {
struct berval bv;
bv.bv_len = sizeof(buf);
bv.bv_val = buf;
string_expand(&bv, &b->a_domain_pat, e->e_ndn, matches);
pat = bv;
}
if ( b->a_domain_style == ACL_STYLE_SUBTREE ) {
int offset = cmp.bv_len - pat.bv_len;
if ( offset < 0 ) {
continue;
}
if ( offset == 1 || ( offset > 1 && cmp.bv_val[ offset - 1 ] != '.' ) ) {
continue;
}
/* trim the domain */
cmp.bv_val = &cmp.bv_val[ offset ];
cmp.bv_len -= offset;
}
if ( ber_bvstrcasecmp( &pat, &cmp ) != 0 ) {
continue;
}
}
}
}
if ( b->a_peername_pat.bv_len ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_perrname_path: %s\n",
conn->c_connid, b->a_peername_pat.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_peername_path: %s\n",
b->a_peername_pat.bv_val, 0, 0 );
#endif
if ( !ber_bvccmp( &b->a_peername_pat, '*' ) ) {
if ( b->a_peername_style == ACL_STYLE_REGEX) {
if (!regex_matches( &b->a_peername_pat, conn->c_peer_name.bv_val,
e->e_ndn, matches ) )
{
continue;
}
} else {
if ( ber_bvstrcasecmp( &b->a_peername_pat, &conn->c_peer_name ) != 0 )
continue;
}
}
}
if ( b->a_sockname_pat.bv_len ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_sockname_path: %s\n",
conn->c_connid, b->a_sockname_pat.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_sockname_path: %s\n",
b->a_sockname_pat.bv_val, 0, 0 );
#endif
if ( !ber_bvccmp( &b->a_sockname_pat, '*' ) ) {
if ( b->a_sockname_style == ACL_STYLE_REGEX) {
if (!regex_matches( &b->a_sockname_pat, conn->c_sock_name.bv_val,
e->e_ndn, matches ) )
{
continue;
}
} else {
if ( ber_bvstrcasecmp( &b->a_sockname_pat, &conn->c_sock_name ) != 0 )
continue;
}
}
}
if ( b->a_dn_at != NULL ) {
Attribute *at;
struct berval bv;
int rc, match = 0;
const char *text;
const char *attr = b->a_dn_at->ad_cname.bv_val;
assert( attr != NULL );
if ( op->o_ndn.bv_len == 0 ) {
continue;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_dn_pat: %s\n",
conn->c_connid, attr ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_dn_at: %s\n",
attr, 0, 0);
#endif
bv = op->o_ndn;
/* see if asker is listed in dnattr */
for( at = attrs_find( e->e_attrs, b->a_dn_at );
at != NULL;
at = attrs_find( at->a_next, b->a_dn_at ) )
{
if( value_find( b->a_dn_at, at->a_vals, &bv ) == 0 ) {
/* found it */
match = 1;
break;
}
}
if( match ) {
/* have a dnattr match. if this is a self clause then
* the target must also match the op dn.
*/
if ( b->a_dn_self ) {
/* check if the target is an attribute. */
if ( val == NULL )
continue;
/* target is attribute, check if the attribute value
* is the op dn.
*/
rc = value_match( &match, b->a_dn_at,
b->a_dn_at->ad_type->sat_equality, 0,
val, &bv, &text );
/* on match error or no match, fail the ACL clause */
if (rc != LDAP_SUCCESS || match != 0 )
continue;
}
} else {
/* no dnattr match, check if this is a self clause */
if ( ! b->a_dn_self )
continue;
ACL_RECORD_VALUE_STATE;
/* this is a self clause, check if the target is an
* attribute.
*/
if ( val == NULL )
continue;
/* target is attribute, check if the attribute value
* is the op dn.
*/
rc = value_match( &match, b->a_dn_at,
b->a_dn_at->ad_type->sat_equality, 0,
val, &bv, &text );
/* on match error or no match, fail the ACL clause */
if (rc != LDAP_SUCCESS || match != 0 )
continue;
}
}
if ( b->a_group_pat.bv_len ) {
char buf[ACL_BUF_SIZE];
struct berval bv;
struct berval ndn = { 0, NULL };
int rc;
if ( op->o_ndn.bv_len == 0 ) {
continue;
}
bv.bv_len = sizeof(buf) - 1;
bv.bv_val = buf;
/* b->a_group is an unexpanded entry name, expanded it should be an
* entry with objectclass group* and we test to see if odn is one of
* the values in the attribute group
*/
/* see if asker is listed in dnattr */
if ( b->a_group_style == ACL_STYLE_REGEX ) {
string_expand(&bv, &b->a_group_pat, e->e_ndn, matches);
if ( dnNormalize2(NULL, &bv, &ndn) != LDAP_SUCCESS ) {
/* did not expand to a valid dn */
continue;
}
bv = ndn;
} else {
bv = b->a_group_pat;
}
rc = backend_group(be, conn, op, e, &bv, &op->o_ndn,
b->a_group_oc, b->a_group_at);
if ( ndn.bv_val )
free( ndn.bv_val );
if ( rc != 0 ) {
continue;
}
}
if ( b->a_set_pat.bv_len != 0 ) {
if (aci_match_set( &b->a_set_pat, be, e, conn, op, 0 ) == 0) {
continue;
}
}
if ( b->a_authz.sai_ssf ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_authz.sai_ssf: ACL %u > OP %u\n",
conn->c_connid, b->a_authz.sai_ssf, op->o_ssf ));
#else
Debug( LDAP_DEBUG_ACL, "<= check a_authz.sai_ssf: ACL %u > OP %u\n",
b->a_authz.sai_ssf, op->o_ssf, 0 );
#endif
if ( b->a_authz.sai_ssf > op->o_ssf ) {
continue;
}
}
if ( b->a_authz.sai_transport_ssf ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
conn->c_connid, b->a_authz.sai_transport_ssf, op->o_transport_ssf ));
#else
Debug( LDAP_DEBUG_ACL,
"<= check a_authz.sai_transport_ssf: ACL %u > OP %u\n",
b->a_authz.sai_transport_ssf, op->o_transport_ssf, 0 );
#endif
if ( b->a_authz.sai_transport_ssf > op->o_transport_ssf ) {
continue;
}
}
if ( b->a_authz.sai_tls_ssf ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
conn->c_connid, b->a_authz.sai_tls_ssf, op->o_tls_ssf ));
#else
Debug( LDAP_DEBUG_ACL,
"<= check a_authz.sai_tls_ssf: ACL %u > OP %u\n",
b->a_authz.sai_tls_ssf, op->o_tls_ssf, 0 );
#endif
if ( b->a_authz.sai_tls_ssf > op->o_tls_ssf ) {
continue;
}
}
if ( b->a_authz.sai_sasl_ssf ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
conn->c_connid, b->a_authz.sai_sasl_ssf, op->o_sasl_ssf ));
#else
Debug( LDAP_DEBUG_ACL,
"<= check a_authz.sai_sasl_ssf: ACL %u > OP %u\n",
b->a_authz.sai_sasl_ssf, op->o_sasl_ssf, 0 );
#endif
if ( b->a_authz.sai_sasl_ssf > op->o_sasl_ssf ) {
continue;
}
}
#ifdef SLAPD_ACI_ENABLED
if ( b->a_aci_at != NULL ) {
Attribute *at;
slap_access_t grant, deny, tgrant, tdeny;
/* this case works different from the others above.
* since aci's themselves give permissions, we need
* to first check b->a_access_mask, the ACL's access level.
*/
if ( e->e_nname.bv_len == 0 ) {
/* no ACIs in the root DSE */
continue;
}
/* first check if the right being requested
* is allowed by the ACL clause.
*/
if ( ! ACL_GRANT( b->a_access_mask, *mask ) ) {
continue;
}
/* get the aci attribute */
at = attr_find( e->e_attrs, b->a_aci_at );
if ( at == NULL ) {
continue;
}
ACL_RECORD_VALUE_STATE;
/* start out with nothing granted, nothing denied */
ACL_INIT(tgrant);
ACL_INIT(tdeny);
/* the aci is an multi-valued attribute. The
* rights are determined by OR'ing the individual
* rights given by the acis.
*/
for ( i = 0; at->a_vals[i].bv_val != NULL; i++ ) {
if (aci_mask( be, conn, op,
e, desc, val, &at->a_vals[i],
matches, &grant, &deny ) != 0)
{
tgrant |= grant;
tdeny |= deny;
}
}
/* remove anything that the ACL clause does not allow */
tgrant &= b->a_access_mask & ACL_PRIV_MASK;
tdeny &= ACL_PRIV_MASK;
/* see if we have anything to contribute */
if( ACL_IS_INVALID(tgrant) && ACL_IS_INVALID(tdeny) ) {
continue;
}
/* this could be improved by changing acl_mask so that it can deal with
* by clauses that return grant/deny pairs. Right now, it does either
* additive or subtractive rights, but not both at the same time. So,
* we need to combine the grant/deny pair into a single rights mask in
* a smart way: if either grant or deny is "empty", then we use the
* opposite as is, otherwise we remove any denied rights from the grant
* rights mask and construct an additive mask.
*/
if (ACL_IS_INVALID(tdeny)) {
modmask = tgrant | ACL_PRIV_ADDITIVE;
} else if (ACL_IS_INVALID(tgrant)) {
modmask = tdeny | ACL_PRIV_SUBSTRACTIVE;
} else {
modmask = (tgrant & ~tdeny) | ACL_PRIV_ADDITIVE;
}
} else
#endif
{
modmask = b->a_access_mask;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
"acl_mask: conn %lu [%d] applying %s (%s)\n",
conn->c_connid, i, accessmask2str( modmask, accessmaskbuf),
b->a_type == ACL_CONTINUE ? "continue" : b->a_type == ACL_BREAK
? "break" : "stop" ));
#else
Debug( LDAP_DEBUG_ACL,
"<= acl_mask: [%d] applying %s (%s)\n",
i, accessmask2str( modmask, accessmaskbuf ),
b->a_type == ACL_CONTINUE
? "continue"
: b->a_type == ACL_BREAK
? "break"
: "stop" );
#endif
/* save old mask */
oldmask = *mask;
if( ACL_IS_ADDITIVE(modmask) ) {
/* add privs */
ACL_PRIV_SET( *mask, modmask );
/* cleanup */
ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
} else if( ACL_IS_SUBTRACTIVE(modmask) ) {
/* substract privs */
ACL_PRIV_CLR( *mask, modmask );
/* cleanup */
ACL_PRIV_CLR( *mask, ~ACL_PRIV_MASK );
} else {
/* assign privs */
*mask = modmask;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
"acl_mask: conn %lu [%d] mask: %s\n",
conn->c_connid, i, accessmask2str( *mask, accessmaskbuf) ));
#else
Debug( LDAP_DEBUG_ACL,
"<= acl_mask: [%d] mask: %s\n",
i, accessmask2str(*mask, accessmaskbuf), 0 );
#endif
if( b->a_type == ACL_CONTINUE ) {
continue;
} else if ( b->a_type == ACL_BREAK ) {
return ACL_BREAK;
} else {
return ACL_STOP;
}
}
/* implicit "by * none" clause */
ACL_INIT(*mask);
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_RESULTS,
"acl_mask: conn %lu no more <who> clauses, returning %d (stop)\n",
conn->c_connid, accessmask2str( *mask, accessmaskbuf) ));
#else
Debug( LDAP_DEBUG_ACL,
"<= acl_mask: no more <who> clauses, returning %s (stop)\n",
accessmask2str(*mask, accessmaskbuf), 0, 0 );
#endif
return ACL_STOP;
}
/*
* acl_check_modlist - check access control on the given entry to see if
* it allows the given modifications by the user associated with op.
* returns 1 if mods allowed ok
* 0 mods not allowed
*/
int
acl_check_modlist(
Backend *be,
Connection *conn,
Operation *op,
Entry *e,
Modifications *mlist
)
{
struct berval *bv;
assert( be != NULL );
/* short circuit root database access */
if ( be_isroot( be, &op->o_ndn ) ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "acl", LDAP_LEVEL_DETAIL1,
"acl_check_modlist: conn %lu access granted to root user\n",
conn->c_connid ));
#else
Debug( LDAP_DEBUG_ACL,
"<= acl_access_allowed: granted to database root\n",
0, 0, 0 );
#endif
return 1;
}
/* use backend default access if no backend acls */
if( be != NULL && be->be_acl == NULL ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
"acl_check_modlist: conn %lu backend default %s access %s to \"%s\"\n",
conn->c_connid, access2str( ACL_WRITE ),
be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: backend default %s access %s to \"%s\"\n",
access2str( ACL_WRITE ),
be->be_dfltaccess >= ACL_WRITE ? "granted" : "denied", op->o_dn.bv_val );
#endif
return be->be_dfltaccess >= ACL_WRITE;
#ifdef notdef
/* be is always non-NULL */
/* use global default access if no global acls */
} else if ( be == NULL && global_acl == NULL ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
"acl_check_modlist: conn %lu global default %s access %s to \"%s\"\n",
conn->c_connid, access2str( ACL_WRITE ),
global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn ));
#else
Debug( LDAP_DEBUG_ACL,
"=> access_allowed: global default %s access %s to \"%s\"\n",
access2str( ACL_WRITE ),
global_default_access >= ACL_WRITE ? "granted" : "denied", op->o_dn );
#endif
return global_default_access >= ACL_WRITE;
#endif
}
for ( ; mlist != NULL; mlist = mlist->sml_next ) {
static AccessControlState state_init = ACL_STATE_INIT;
AccessControlState state;
/*
* no-user-modification operational attributes are ignored
* by ACL_WRITE checking as any found here are not provided
* by the user
*/
if ( is_at_no_user_mod( mlist->sml_desc->ad_type ) ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
"acl_check_modlist: conn %lu no-user-mod %s: modify access granted\n",
conn->c_connid, mlist->sml_desc->ad_cname.bv_val ));
#else
Debug( LDAP_DEBUG_ACL, "acl: no-user-mod %s:"
" modify access granted\n",
mlist->sml_desc->ad_cname.bv_val, 0, 0 );
#endif
continue;
}
state = state_init;
switch ( mlist->sml_op ) {
case LDAP_MOD_REPLACE:
/*
* We must check both permission to delete the whole
* attribute and permission to add the specific attributes.
* This prevents abuse from selfwriters.
*/
if ( ! access_allowed( be, conn, op, e,
mlist->sml_desc, NULL, ACL_WRITE, &state ) )
{
return( 0 );
}
if ( mlist->sml_bvalues == NULL ) break;
/* fall thru to check value to add */
case LDAP_MOD_ADD:
assert( mlist->sml_bvalues != NULL );
for ( bv = mlist->sml_bvalues; bv->bv_val != NULL; bv++ ) {
if ( ! access_allowed( be, conn, op, e,
mlist->sml_desc, bv, ACL_WRITE, &state ) )
{
return( 0 );
}
}
break;
case LDAP_MOD_DELETE:
if ( mlist->sml_bvalues == NULL ) {
if ( ! access_allowed( be, conn, op, e,
mlist->sml_desc, NULL, ACL_WRITE, NULL ) )
{
return( 0 );
}
break;
}
for ( bv = mlist->sml_bvalues; bv->bv_val != NULL; bv++ ) {
if ( ! access_allowed( be, conn, op, e,
mlist->sml_desc, bv, ACL_WRITE, &state ) )
{
return( 0 );
}
}
break;
case SLAP_MOD_SOFTADD:
/* allow adding attribute via modrdn thru */
break;
default:
assert( 0 );
return( 0 );
}
}
return( 1 );
}
#if 0 /* not used any more */
static char *
aci_bvstrdup( struct berval *bv )
{
char *s;
s = (char *)ch_malloc(bv->bv_len + 1);
if (s != NULL) {
AC_MEMCPY(s, bv->bv_val, bv->bv_len);
s[bv->bv_len] = 0;
}
return(s);
}
#endif
static int
aci_get_part(
struct berval *list,
int ix,
char sep,
struct berval *bv )
{
int len;
char *p;
if (bv) {
bv->bv_len = 0;
bv->bv_val = NULL;
}
len = list->bv_len;
p = list->bv_val;
while (len >= 0 && --ix >= 0) {
while (--len >= 0 && *p++ != sep) ;
}
while (len >= 0 && *p == ' ') {
len--;
p++;
}
if (len < 0)
return(-1);
if (!bv)
return(0);
bv->bv_val = p;
while (--len >= 0 && *p != sep) {
bv->bv_len++;
p++;
}
while (bv->bv_len > 0 && *--p == ' ')
bv->bv_len--;
return(bv->bv_len);
}
BerVarray
aci_set_gather (void *cookie, struct berval *name, struct berval *attr)
{
AciSetCookie *cp = cookie;
BerVarray bvals = NULL;
struct berval ndn;
/* this routine needs to return the bervals instead of
* plain strings, since syntax is not known. It should
* also return the syntax or some "comparison cookie".
*/
if (dnNormalize2(NULL, name, &ndn) == LDAP_SUCCESS) {
const char *text;
AttributeDescription *desc = NULL;
if (slap_bv2ad(attr, &desc, &text) == LDAP_SUCCESS) {
backend_attribute(cp->be, NULL, NULL,
cp->e, &ndn, desc, &bvals);
}
free(ndn.bv_val);
}
return(bvals);
}
static int
aci_match_set (
struct berval *subj,
Backend *be,
Entry *e,
Connection *conn,
Operation *op,
int setref
)
{
struct berval set = { 0, NULL };
int rc = 0;
AciSetCookie cookie;
if (setref == 0) {
ber_dupbv( &set, subj );
} else {
struct berval subjdn, ndn = { 0, NULL };
struct berval setat;
BerVarray bvals;
const char *text;
AttributeDescription *desc = NULL;
/* format of string is "entry/setAttrName" */
if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
return(0);
}
if ( aci_get_part(subj, 1, '/', &setat) < 0 ) {
setat.bv_val = SLAPD_ACI_SET_ATTR;
setat.bv_len = sizeof(SLAPD_ACI_SET_ATTR)-1;
}
if ( setat.bv_val != NULL ) {
/*
* NOTE: dnNormalize2 honors the ber_len field
* as the length of the dn to be normalized
*/
if ( dnNormalize2(NULL, &subjdn, &ndn) == LDAP_SUCCESS
&& slap_bv2ad(&setat, &desc, &text) == LDAP_SUCCESS )
{
backend_attribute(be, NULL, NULL, e,
&ndn, desc, &bvals);
if ( bvals != NULL ) {
if ( bvals[0].bv_val != NULL ) {
int i;
set = bvals[0];
bvals[0].bv_val = NULL;
for (i=1;bvals[i].bv_val;i++);
bvals[0].bv_val = bvals[i-1].bv_val;
bvals[i-1].bv_val = NULL;
}
ber_bvarray_free(bvals);
}
}
if (ndn.bv_val)
free(ndn.bv_val);
}
}
if (set.bv_val != NULL) {
cookie.be = be;
cookie.e = e;
cookie.conn = conn;
cookie.op = op;
rc = (slap_set_filter(aci_set_gather, &cookie, &set,
&op->o_ndn, &e->e_nname, NULL) > 0);
ch_free(set.bv_val);
}
return(rc);
}
#ifdef SLAPD_ACI_ENABLED
static int
aci_list_map_rights(
struct berval *list )
{
struct berval bv;
slap_access_t mask;
int i;
ACL_INIT(mask);
for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
if (bv.bv_len <= 0)
continue;
switch (*bv.bv_val) {
case 'c':
ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
break;
case 's':
/* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt defines
* the right 's' to mean "set", but in the examples states
* that the right 's' means "search". The latter definition
* is used here.
*/
ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
break;
case 'r':
ACL_PRIV_SET(mask, ACL_PRIV_READ);
break;
case 'w':
ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
break;
case 'x':
/* **** NOTE: draft-ietf-ldapext-aci-model-0.3.txt does not
* define any equivalent to the AUTH right, so I've just used
* 'x' for now.
*/
ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
break;
default:
break;
}
}
return(mask);
}
static int
aci_list_has_attr(
struct berval *list,
const struct berval *attr,
struct berval *val )
{
struct berval bv, left, right;
int i;
for (i = 0; aci_get_part(list, i, ',', &bv) >= 0; i++) {
if (aci_get_part(&bv, 0, '=', &left) < 0
|| aci_get_part(&bv, 1, '=', &right) < 0)
{
if (ber_bvstrcasecmp(attr, &bv) == 0)
return(1);
} else if (val == NULL) {
if (ber_bvstrcasecmp(attr, &left) == 0)
return(1);
} else {
if (ber_bvstrcasecmp(attr, &left) == 0) {
/* this is experimental code that implements a
* simple (prefix) match of the attribute value.
* the ACI draft does not provide for aci's that
* apply to specific values, but it would be
* nice to have. If the <attr> part of an aci's
* rights list is of the form <attr>=<value>,
* that means the aci applies only to attrs with
* the given value. Furthermore, if the attr is
* of the form <attr>=<value>*, then <value> is
* treated as a prefix, and the aci applies to
* any value with that prefix.
*
* Ideally, this would allow r.e. matches.
*/
if (aci_get_part(&right, 0, '*', &left) < 0
|| right.bv_len <= left.bv_len)
{
if (ber_bvstrcasecmp(val, &right) == 0)
return(1);
} else if (val->bv_len >= left.bv_len) {
if (strncasecmp( val->bv_val, left.bv_val, left.bv_len ) == 0)
return(1);
}
}
}
}
return(0);
}
static slap_access_t
aci_list_get_attr_rights(
struct berval *list,
const struct berval *attr,
struct berval *val )
{
struct berval bv;
slap_access_t mask;
int i;
/* loop through each rights/attr pair, skip first part (action) */
ACL_INIT(mask);
for (i = 1; aci_get_part(list, i + 1, ';', &bv) >= 0; i += 2) {
if (aci_list_has_attr(&bv, attr, val) == 0)
continue;
if (aci_get_part(list, i, ';', &bv) < 0)
continue;
mask |= aci_list_map_rights(&bv);
}
return(mask);
}
static int
aci_list_get_rights(
struct berval *list,
const struct berval *attr,
struct berval *val,
slap_access_t *grant,
slap_access_t *deny )
{
struct berval perm, actn;
slap_access_t *mask;
int i, found;
if (attr == NULL || attr->bv_len == 0
|| ber_bvstrcasecmp( attr, &aci_bv_entry ) == 0) {
attr = &aci_bv_br_entry;
}
found = 0;
ACL_INIT(*grant);
ACL_INIT(*deny);
/* loop through each permissions clause */
for (i = 0; aci_get_part(list, i, '$', &perm) >= 0; i++) {
if (aci_get_part(&perm, 0, ';', &actn) < 0)
continue;
if (ber_bvstrcasecmp( &aci_bv_grant, &actn ) == 0) {
mask = grant;
} else if (ber_bvstrcasecmp( &aci_bv_deny, &actn ) == 0) {
mask = deny;
} else {
continue;
}
found = 1;
*mask |= aci_list_get_attr_rights(&perm, attr, val);
*mask |= aci_list_get_attr_rights(&perm, &aci_bv_br_all, NULL);
}
return(found);
}
static int
aci_group_member (
struct berval *subj,
struct berval *defgrpoc,
struct berval *defgrpat,
Backend *be,
Entry *e,
Connection *conn,
Operation *op,
regmatch_t *matches
)
{
struct berval subjdn;
struct berval grpoc;
struct berval grpat;
ObjectClass *grp_oc = NULL;
AttributeDescription *grp_ad = NULL;
const char *text;
int rc;
/* format of string is "group/objectClassValue/groupAttrName" */
if (aci_get_part(subj, 0, '/', &subjdn) < 0) {
return(0);
}
if (aci_get_part(subj, 1, '/', &grpoc) < 0) {
grpoc = *defgrpoc;
}
if (aci_get_part(subj, 2, '/', &grpat) < 0) {
grpat = *defgrpat;
}
rc = slap_bv2ad( &grpat, &grp_ad, &text );
if( rc != LDAP_SUCCESS ) {
rc = 0;
goto done;
}
rc = 0;
grp_oc = oc_bvfind( &grpoc );
if (grp_oc != NULL && grp_ad != NULL ) {
char buf[ACL_BUF_SIZE];
struct berval bv, ndn;
bv.bv_len = sizeof( buf );
bv.bv_val = &buf;
string_expand(&bv, &subjdn, e->e_ndn, matches);
if ( dnNormalize2(NULL, &bv, &ndn) == LDAP_SUCCESS ) {
rc = (backend_group(be, conn, op, e, &ndn, &op->o_ndn, grp_oc, grp_ad) == 0);
free( ndn.bv_val );
}
}
done:
return(rc);
}
static struct berval GroupClass = {
sizeof(SLAPD_GROUP_CLASS)-1, SLAPD_GROUP_CLASS };
static struct berval GroupAttr = {
sizeof(SLAPD_GROUP_ATTR)-1, SLAPD_GROUP_ATTR };
static struct berval RoleClass = {
sizeof(SLAPD_ROLE_CLASS)-1, SLAPD_ROLE_CLASS };
static struct berval RoleAttr = {
sizeof(SLAPD_ROLE_ATTR)-1, SLAPD_ROLE_ATTR };
static int
aci_mask(
Backend *be,
Connection *conn,
Operation *op,
Entry *e,
AttributeDescription *desc,
struct berval *val,
struct berval *aci,
regmatch_t *matches,
slap_access_t *grant,
slap_access_t *deny
)
{
struct berval bv, perms, sdn;
int rc;
assert( desc->ad_cname.bv_val != NULL );
/* parse an aci of the form:
oid#scope#action;rights;attr;rights;attr$action;rights;attr;rights;attr#dnType#subjectDN
See draft-ietf-ldapext-aci-model-04.txt section 9.1 for
a full description of the format for this attribute.
For now, this routine only supports scope=entry.
*/
/* check that the aci has all 5 components */
if (aci_get_part(aci, 4, '#', NULL) < 0)
return(0);
/* check that the aci family is supported */
if (aci_get_part(aci, 0, '#', &bv) < 0)
return(0);
/* check that the scope is "entry" */
if (aci_get_part(aci, 1, '#', &bv) < 0
|| ber_bvstrcasecmp( &aci_bv_entry, &bv ) != 0)
{
return(0);
}
/* get the list of permissions clauses, bail if empty */
if (aci_get_part(aci, 2, '#', &perms) <= 0)
return(0);
/* check if any permissions allow desired access */
if (aci_list_get_rights(&perms, &desc->ad_cname, val, grant, deny) == 0)
return(0);
/* see if we have a DN match */
if (aci_get_part(aci, 3, '#', &bv) < 0)
return(0);
if (aci_get_part(aci, 4, '#', &sdn) < 0)
return(0);
if (ber_bvstrcasecmp( &aci_bv_access_id, &bv ) == 0) {
struct berval ndn;
rc = 1;
if ( dnNormalize2(NULL, &sdn, &ndn) == LDAP_SUCCESS ) {
if (!dn_match( &op->o_ndn, &ndn))
rc = 0;
free(ndn.bv_val);
}
return(rc);
}
if (ber_bvstrcasecmp( &aci_bv_self, &bv ) == 0) {
if (dn_match(&op->o_ndn, &e->e_nname))
return(1);
} else if (ber_bvstrcasecmp( &aci_bv_dnattr, &bv ) == 0) {
Attribute *at;
AttributeDescription *ad = NULL;
const char *text;
rc = slap_bv2ad( &sdn, &ad, &text );
if( rc != LDAP_SUCCESS ) {
return 0;
}
rc = 0;
bv = op->o_ndn;
for(at = attrs_find( e->e_attrs, ad );
at != NULL;
at = attrs_find( at->a_next, ad ) )
{
if (value_find( ad, at->a_vals, &bv) == 0 ) {
rc = 1;
break;
}
}
return rc;
} else if (ber_bvstrcasecmp( &aci_bv_group, &bv ) == 0) {
if (aci_group_member(&sdn, &GroupClass, &GroupAttr, be, e, conn, op, matches))
return(1);
} else if (ber_bvstrcasecmp( &aci_bv_role, &bv ) == 0) {
if (aci_group_member(&sdn, &RoleClass, &RoleAttr, be, e, conn, op, matches))
return(1);
} else if (ber_bvstrcasecmp( &aci_bv_set, &bv ) == 0) {
if (aci_match_set(&sdn, be, e, conn, op, 0))
return(1);
} else if (ber_bvstrcasecmp( &aci_bv_set_ref, &bv ) == 0) {
if (aci_match_set(&sdn, be, e, conn, op, 1))
return(1);
}
return(0);
}
#endif /* SLAPD_ACI_ENABLED */
static void
string_expand(
struct berval *bv,
struct berval *pat,
char *match,
regmatch_t *matches)
{
ber_len_t size;
char *sp;
char *dp;
int flag;
size = 0;
bv->bv_val[0] = '\0';
bv->bv_len--; /* leave space for lone $ */
flag = 0;
for ( dp = bv->bv_val, sp = pat->bv_val; size < bv->bv_len &&
sp < pat->bv_val + pat->bv_len ; sp++) {
/* did we previously see a $ */
if ( flag ) {
if ( flag == 1 && *sp == '$' ) {
*dp++ = '$';
size++;
flag = 0;
} else if ( flag == 1 && *sp == '{') {
flag = 2;
} else if ( *sp >= '0' && *sp <= '9' ) {
int n;
int i;
int l;
n = *sp - '0';
if ( flag == 2 ) {
for ( sp++; *sp != '\0' && *sp != /* { */ '}'; sp++ ) {
if ( *sp >= '0' && *sp <= '9' ) {
n = 10*n + ( *sp - '0' );
}
}
if ( *sp != /* { */ '}' ) {
/* error */
}
}
if ( n >= MAXREMATCHES ) {
}
*dp = '\0';
i = matches[n].rm_so;
l = matches[n].rm_eo;
for ( ; size < bv->bv_len && i < l; size++, i++ ) {
*dp++ = match[i];
}
*dp = '\0';
flag = 0;
}
} else {
if (*sp == '$') {
flag = 1;
} else {
*dp++ = *sp;
size++;
}
}
}
if ( flag ) {
/* must have ended with a single $ */
*dp++ = '$';
size++;
}
*dp = '\0';
bv->bv_len = size;
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
"string_expand: pattern = %.*s\n", (int)pat->bv_len, pat->bv_val ));
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL1,
"string_expand: expanded = %s\n", bv->bv_val ));
#else
Debug( LDAP_DEBUG_TRACE, "=> string_expand: pattern: %.*s\n", (int)pat->bv_len, pat->bv_val, 0 );
Debug( LDAP_DEBUG_TRACE, "=> string_expand: expanded: %s\n", bv->bv_val, 0, 0 );
#endif
}
static int
regex_matches(
struct berval *pat, /* pattern to expand and match against */
char *str, /* string to match against pattern */
char *buf, /* buffer with $N expansion variables */
regmatch_t *matches /* offsets in buffer for $N expansion variables */
)
{
regex_t re;
char newbuf[512];
struct berval bv;
int rc;
bv.bv_len = sizeof(newbuf);
bv.bv_val = newbuf;
if(str == NULL) str = "";
string_expand(&bv, pat, buf, matches);
if (( rc = regcomp(&re, newbuf, REG_EXTENDED|REG_ICASE))) {
char error[512];
regerror(rc, &re, error, sizeof(error));
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_ERR,
"regex_matches: compile( \"%s\", \"%s\") failed %s\n",
pat->bv_val, str, error ));
#else
Debug( LDAP_DEBUG_TRACE,
"compile( \"%s\", \"%s\") failed %s\n",
pat->bv_val, str, error );
#endif
return( 0 );
}
rc = regexec(&re, str, 0, NULL, 0);
regfree( &re );
#ifdef NEW_LOGGING
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
"regex_matches: string: %s\n", str ));
LDAP_LOG(( "aci", LDAP_LEVEL_DETAIL2,
"regex_matches: rc: %d %s\n",
rc, rc ? "matches" : "no matches" ));
#else
Debug( LDAP_DEBUG_TRACE,
"=> regex_matches: string: %s\n", str, 0, 0 );
Debug( LDAP_DEBUG_TRACE,
"=> regex_matches: rc: %d %s\n",
rc, !rc ? "matches" : "no matches", 0 );
#endif
return( !rc );
}
Reference in New Issue View Git Blame Copy Permalink