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openldap/servers/slapd/aclparse.c

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/* aclparse.c - routines to parse and check acl's */
/* $OpenLDAP$ */
/*
* Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <ac/ctype.h>
#include <ac/regex.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/unistd.h>
#include "slap.h"
#include "lber_pvt.h"
#include "lutil.h"
static void split(char *line, int splitchar, char **left, char **right);
static void access_append(Access **l, Access *a);
static void acl_usage(void) LDAP_GCCATTR((noreturn));
static void acl_regex_normalized_dn(const char *src, struct berval *pat);
#ifdef LDAP_DEBUG
static void print_acl(Backend *be, AccessControl *a);
static void print_access(Access *b);
#endif
static void
regtest(const char *fname, int lineno, char *pat) {
int e;
regex_t re;
char buf[512];
unsigned size;
char *sp;
char *dp;
int flag;
sp = pat;
dp = buf;
size = 0;
buf[0] = '\0';
for (size = 0, flag = 0; (size < sizeof(buf)) && *sp; sp++) {
if (flag) {
if (*sp == '$'|| (*sp >= '0' && *sp <= '9')) {
*dp++ = *sp;
size++;
}
flag = 0;
} else {
if (*sp == '$') {
flag = 1;
} else {
*dp++ = *sp;
size++;
}
}
}
*dp = '\0';
if ( size >= (sizeof(buf)-1) ) {
fprintf( stderr,
"%s: line %d: regular expression \"%s\" too large\n",
fname, lineno, pat );
acl_usage();
}
if ((e = regcomp(&re, buf, REG_EXTENDED|REG_ICASE))) {
char error[512];
regerror(e, &re, error, sizeof(error));
fprintf( stderr,
"%s: line %d: regular expression \"%s\" bad because of %s\n",
fname, lineno, pat, error );
acl_usage();
}
regfree(&re);
}
void
parse_acl(
Backend *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
int i;
char *left, *right, *style;
struct berval bv;
AccessControl *a;
Access *b;
int rc;
const char *text;
a = NULL;
for ( i = 1; i < argc; i++ ) {
/* to clause - select which entries are protected */
if ( strcasecmp( argv[i], "to" ) == 0 ) {
if ( a != NULL ) {
fprintf( stderr, "%s: line %d: "
"only one to clause allowed in access line\n",
fname, lineno );
acl_usage();
}
a = (AccessControl *) ch_calloc( 1, sizeof(AccessControl) );
for ( ++i; i < argc; i++ ) {
if ( strcasecmp( argv[i], "by" ) == 0 ) {
i--;
break;
}
if ( strcasecmp( argv[i], "*" ) == 0 ) {
if( a->acl_dn_pat.bv_len ||
( a->acl_dn_style != ACL_STYLE_REGEX ) )
{
fprintf( stderr,
"%s: line %d: dn pattern"
" already specified in to clause.\n",
fname, lineno );
acl_usage();
}
a->acl_dn_pat.bv_val = ch_strdup( "*" );
a->acl_dn_pat.bv_len = 1;
continue;
}
split( argv[i], '=', &left, &right );
split( left, '.', &left, &style );
if ( right == NULL ) {
fprintf( stderr, "%s: line %d: "
"missing \"=\" in \"%s\" in to clause\n",
fname, lineno, left );
acl_usage();
}
if ( strcasecmp( left, "dn" ) == 0 ) {
if( a->acl_dn_pat.bv_len != 0 ||
( a->acl_dn_style != ACL_STYLE_REGEX ) )
{
fprintf( stderr,
"%s: line %d: dn pattern"
" already specified in to clause.\n",
fname, lineno );
acl_usage();
}
if ( style == NULL || *style == '\0' ||
( strcasecmp( style, "base" ) == 0 ) ||
( strcasecmp( style, "exact" ) == 0 ))
{
a->acl_dn_style = ACL_STYLE_BASE;
ber_str2bv( right, 0, 1, &a->acl_dn_pat );
} else if ( strcasecmp( style, "one" ) == 0 ) {
a->acl_dn_style = ACL_STYLE_ONE;
ber_str2bv( right, 0, 1, &a->acl_dn_pat );
} else if ( strcasecmp( style, "subtree" ) == 0
|| strcasecmp( style, "sub" ) == 0 )
{
a->acl_dn_style = ACL_STYLE_SUBTREE;
ber_str2bv( right, 0, 1, &a->acl_dn_pat );
} else if ( strcasecmp( style, "children" ) == 0 ) {
a->acl_dn_style = ACL_STYLE_CHILDREN;
ber_str2bv( right, 0, 1, &a->acl_dn_pat );
} else if ( strcasecmp( style, "regex" ) == 0 ) {
a->acl_dn_style = ACL_STYLE_REGEX;
if ( *right == '\0' ) {
/* empty regex should match empty DN */
a->acl_dn_style = ACL_STYLE_BASE;
ber_str2bv( right, 0, 1, &a->acl_dn_pat );
} else if ( strcmp(right, "*") == 0
|| strcmp(right, ".*") == 0
|| strcmp(right, ".*$") == 0
|| strcmp(right, "^.*") == 0
|| strcmp(right, "^.*$") == 0
|| strcmp(right, ".*$$") == 0
|| strcmp(right, "^.*$$") == 0 )
{
a->acl_dn_pat.bv_val = ch_strdup( "*" );
a->acl_dn_pat.bv_len = sizeof("*")-1;
} else {
acl_regex_normalized_dn( right, &a->acl_dn_pat );
}
} else {
fprintf( stderr, "%s: line %d: "
"unknown dn style \"%s\" in to clause\n",
fname, lineno, style );
acl_usage();
}
continue;
}
if ( strcasecmp( left, "filter" ) == 0 ) {
if ( (a->acl_filter = str2filter( right )) == NULL ) {
fprintf( stderr,
"%s: line %d: bad filter \"%s\" in to clause\n",
fname, lineno, right );
acl_usage();
}
} else if ( strncasecmp( left, "attr", 4 ) == 0 ) {
a->acl_attrs = str2anlist( a->acl_attrs,
right, "," );
if ( a->acl_attrs == NULL ) {
fprintf( stderr,
"%s: line %d: unknown attr \"%s\" in to clause\n",
fname, lineno, right );
acl_usage();
}
} else {
fprintf( stderr,
"%s: line %d: expecting <what> got \"%s\"\n",
fname, lineno, left );
acl_usage();
}
}
if ( a->acl_dn_pat.bv_len != 0 &&
strcmp(a->acl_dn_pat.bv_val, "*") == 0 )
{
free( a->acl_dn_pat.bv_val );
a->acl_dn_pat.bv_val = NULL;
a->acl_dn_pat.bv_len = 0;
}
if( a->acl_dn_pat.bv_len != 0 ||
( a->acl_dn_style != ACL_STYLE_REGEX ) )
{
if ( a->acl_dn_style != ACL_STYLE_REGEX ) {
struct berval bv;
rc = dnNormalize( 0, NULL, NULL, &a->acl_dn_pat, &bv, NULL);
if ( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: bad DN \"%s\" in to DN clause\n",
fname, lineno, a->acl_dn_pat.bv_val );
acl_usage();
}
free( a->acl_dn_pat.bv_val );
a->acl_dn_pat = bv;
} else {
int e = regcomp( &a->acl_dn_re, a->acl_dn_pat.bv_val,
REG_EXTENDED | REG_ICASE );
if ( e ) {
char buf[512];
regerror( e, &a->acl_dn_re, buf, sizeof(buf) );
fprintf( stderr, "%s: line %d: "
"regular expression \"%s\" bad because of %s\n",
fname, lineno, right, buf );
acl_usage();
}
}
}
/* by clause - select who has what access to entries */
} else if ( strcasecmp( argv[i], "by" ) == 0 ) {
if ( a == NULL ) {
fprintf( stderr, "%s: line %d: "
"to clause required before by clause in access line\n",
fname, lineno );
acl_usage();
}
/*
* by clause consists of <who> and <access>
*/
b = (Access *) ch_calloc( 1, sizeof(Access) );
ACL_INVALIDATE( b->a_access_mask );
if ( ++i == argc ) {
fprintf( stderr,
"%s: line %d: premature eol: expecting <who>\n",
fname, lineno );
acl_usage();
}
/* get <who> */
for ( ; i < argc; i++ ) {
slap_style_t sty = ACL_STYLE_REGEX;
char *style_modifier = NULL;
int expand = 0;
split( argv[i], '=', &left, &right );
split( left, '.', &left, &style );
if ( style ) {
split( style, ',', &style, &style_modifier);
}
if ( style == NULL || *style == '\0' ||
strcasecmp( style, "exact" ) == 0 ||
strcasecmp( style, "base" ) == 0 )
{
sty = ACL_STYLE_BASE;
} else if ( strcasecmp( style, "one" ) == 0 ) {
sty = ACL_STYLE_ONE;
} else if ( strcasecmp( style, "subtree" ) == 0 ||
strcasecmp( style, "sub" ) == 0 )
{
sty = ACL_STYLE_SUBTREE;
} else if ( strcasecmp( style, "children" ) == 0 ) {
sty = ACL_STYLE_CHILDREN;
} else if ( strcasecmp( style, "regex" ) == 0 ) {
sty = ACL_STYLE_REGEX;
} else {
fprintf( stderr,
"%s: line %d: unknown style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if ( style_modifier &&
strcasecmp( style_modifier, "expand" ) == 0 )
{
expand = 1;
}
if ( strcasecmp( argv[i], "*" ) == 0 ) {
bv.bv_val = ch_strdup( "*" );
bv.bv_len = 1;
sty = ACL_STYLE_REGEX;
} else if ( strcasecmp( argv[i], "anonymous" ) == 0 ) {
ber_str2bv("anonymous", sizeof("anonymous")-1, 1, &bv);
sty = ACL_STYLE_REGEX;
} else if ( strcasecmp( argv[i], "self" ) == 0 ) {
ber_str2bv("self", sizeof("self")-1, 1, &bv);
sty = ACL_STYLE_REGEX;
} else if ( strcasecmp( argv[i], "users" ) == 0 ) {
ber_str2bv("users", sizeof("users")-1, 1, &bv);
sty = ACL_STYLE_REGEX;
} else if ( strcasecmp( left, "dn" ) == 0 ) {
if ( sty == ACL_STYLE_REGEX ) {
b->a_dn_style = ACL_STYLE_REGEX;
if( right == NULL ) {
/* no '=' */
ber_str2bv("users",
sizeof("users")-1,
1, &bv);
} else if (*right == '\0' ) {
/* dn="" */
ber_str2bv("anonymous",
sizeof("anonymous")-1,
1, &bv);
} else if ( strcmp( right, "*" ) == 0 ) {
/* dn=* */
/* any or users? users for now */
ber_str2bv("users",
sizeof("users")-1,
1, &bv);
} else if ( strcmp( right, ".+" ) == 0
|| strcmp( right, "^.+" ) == 0
|| strcmp( right, ".+$" ) == 0
|| strcmp( right, "^.+$" ) == 0
|| strcmp( right, ".+$$" ) == 0
|| strcmp( right, "^.+$$" ) == 0 )
{
ber_str2bv("users",
sizeof("users")-1,
1, &bv);
} else if ( strcmp( right, ".*" ) == 0
|| strcmp( right, "^.*" ) == 0
|| strcmp( right, ".*$" ) == 0
|| strcmp( right, "^.*$" ) == 0
|| strcmp( right, ".*$$" ) == 0
|| strcmp( right, "^.*$$" ) == 0 )
{
ber_str2bv("*",
sizeof("*")-1,
1, &bv);
} else {
acl_regex_normalized_dn( right, &bv );
if ( !ber_bvccmp( &bv, '*' ) ) {
regtest(fname, lineno, bv.bv_val);
}
}
} else if ( right == NULL || *right == '\0' ) {
fprintf( stderr, "%s: line %d: "
"missing \"=\" in (or value after) \"%s\" "
"in by clause\n",
fname, lineno, left );
acl_usage();
} else {
ber_str2bv( right, 0, 1, &bv );
}
} else {
bv.bv_val = NULL;
}
if( bv.bv_val != NULL ) {
if( b->a_dn_pat.bv_len != 0 ) {
fprintf( stderr,
"%s: line %d: dn pattern already specified.\n",
fname, lineno );
acl_usage();
}
if ( sty != ACL_STYLE_REGEX && expand == 0 ) {
rc = dnNormalize(0, NULL, NULL,
&bv, &b->a_dn_pat, NULL);
if ( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: bad DN \"%s\" in by DN clause\n",
fname, lineno, bv.bv_val );
acl_usage();
}
free(bv.bv_val);
} else {
b->a_dn_pat = bv;
}
b->a_dn_style = sty;
b->a_dn_expand = expand;
continue;
}
if ( strcasecmp( left, "dnattr" ) == 0 ) {
if ( right == NULL || right[ 0 ] == '\0' ) {
fprintf( stderr,
"%s: line %d: missing \"=\" in (or value after) \"%s\" in by clause\n",
fname, lineno, left );
acl_usage();
}
if( b->a_dn_at != NULL ) {
fprintf( stderr,
"%s: line %d: dnattr already specified.\n",
fname, lineno );
acl_usage();
}
rc = slap_str2ad( right, &b->a_dn_at, &text );
if( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: dnattr \"%s\": %s\n",
fname, lineno, right, text );
acl_usage();
}
if( !is_at_syntax( b->a_dn_at->ad_type,
SLAPD_DN_SYNTAX ) &&
!is_at_syntax( b->a_dn_at->ad_type,
SLAPD_NAMEUID_SYNTAX ))
{
fprintf( stderr,
"%s: line %d: dnattr \"%s\": "
"inappropriate syntax: %s\n",
fname, lineno, right,
b->a_dn_at->ad_type->sat_syntax_oid );
acl_usage();
}
if( b->a_dn_at->ad_type->sat_equality == NULL ) {
fprintf( stderr,
"%s: line %d: dnattr \"%s\": "
"inappropriate matching (no EQUALITY)\n",
fname, lineno, right );
acl_usage();
}
continue;
}
if ( strncasecmp( left, "group", sizeof("group")-1 ) == 0 ) {
char *name = NULL;
char *value = NULL;
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr, "%s: line %d: "
"inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if ( right == NULL || right[ 0 ] == '\0' ) {
fprintf( stderr, "%s: line %d: "
"missing \"=\" in (or value after) \"%s\" "
"in by clause\n",
fname, lineno, left );
acl_usage();
}
if( b->a_group_pat.bv_len ) {
fprintf( stderr,
"%s: line %d: group pattern already specified.\n",
fname, lineno );
acl_usage();
}
/* format of string is
"group/objectClassValue/groupAttrName" */
if ((value = strchr(left, '/')) != NULL) {
*value++ = '\0';
if (*value && (name = strchr(value, '/')) != NULL) {
*name++ = '\0';
}
}
b->a_group_style = sty;
if (sty == ACL_STYLE_REGEX) {
acl_regex_normalized_dn( right, &bv );
if ( !ber_bvccmp( &bv, '*' ) ) {
regtest(fname, lineno, bv.bv_val);
}
b->a_group_pat = bv;
} else {
ber_str2bv( right, 0, 0, &bv );
rc = dnNormalize( 0, NULL, NULL, &bv,
&b->a_group_pat, NULL );
if ( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: bad DN \"%s\"\n",
fname, lineno, right );
acl_usage();
}
}
if (value && *value) {
b->a_group_oc = oc_find( value );
*--value = '/';
if( b->a_group_oc == NULL ) {
fprintf( stderr,
"%s: line %d: group objectclass "
"\"%s\" unknown\n",
fname, lineno, value );
acl_usage();
}
} else {
b->a_group_oc = oc_find(SLAPD_GROUP_CLASS);
if( b->a_group_oc == NULL ) {
fprintf( stderr,
"%s: line %d: group default objectclass "
"\"%s\" unknown\n",
fname, lineno, SLAPD_GROUP_CLASS );
acl_usage();
}
}
if( is_object_subclass( slap_schema.si_oc_referral,
b->a_group_oc ))
{
fprintf( stderr,
"%s: line %d: group objectclass \"%s\" "
"is subclass of referral\n",
fname, lineno, value );
acl_usage();
}
if( is_object_subclass( slap_schema.si_oc_alias,
b->a_group_oc ))
{
fprintf( stderr,
"%s: line %d: group objectclass \"%s\" "
"is subclass of alias\n",
fname, lineno, value );
acl_usage();
}
if (name && *name) {
rc = slap_str2ad( name, &b->a_group_at, &text );
if( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: group \"%s\": %s\n",
fname, lineno, right, text );
acl_usage();
}
*--name = '/';
} else {
rc = slap_str2ad( SLAPD_GROUP_ATTR, &b->a_group_at, &text );
if( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: group \"%s\": %s\n",
fname, lineno, SLAPD_GROUP_ATTR, text );
acl_usage();
}
}
if( !is_at_syntax( b->a_group_at->ad_type,
SLAPD_DN_SYNTAX ) &&
!is_at_syntax( b->a_group_at->ad_type,
SLAPD_NAMEUID_SYNTAX ) )
{
fprintf( stderr,
"%s: line %d: group \"%s\": inappropriate syntax: %s\n",
fname, lineno, right,
b->a_group_at->ad_type->sat_syntax_oid );
acl_usage();
}
{
int rc;
struct berval vals[2];
vals[0].bv_val = b->a_group_oc->soc_oid;
vals[0].bv_len = strlen(vals[0].bv_val);
vals[1].bv_val = NULL;
rc = oc_check_allowed( b->a_group_at->ad_type,
vals, NULL );
if( rc != 0 ) {
fprintf( stderr, "%s: line %d: "
"group: \"%s\" not allowed by \"%s\"\n",
fname, lineno,
b->a_group_at->ad_cname.bv_val,
b->a_group_oc->soc_oid );
acl_usage();
}
}
continue;
}
if ( strcasecmp( left, "peername" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr, "%s: line %d: "
"inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if ( right == NULL || right[ 0 ] == '\0' ) {
fprintf( stderr, "%s: line %d: "
"missing \"=\" in (or value after) \"%s\" "
"in by clause\n",
fname, lineno, left );
acl_usage();
}
if( b->a_peername_pat.bv_len ) {
fprintf( stderr, "%s: line %d: "
"peername pattern already specified.\n",
fname, lineno );
acl_usage();
}
b->a_peername_style = sty;
if (sty == ACL_STYLE_REGEX) {
acl_regex_normalized_dn( right, &bv );
if ( !ber_bvccmp( &bv, '*' ) ) {
regtest(fname, lineno, bv.bv_val);
}
b->a_peername_pat = bv;
} else {
ber_str2bv( right, 0, 1, &b->a_peername_pat );
}
continue;
}
if ( strcasecmp( left, "sockname" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr, "%s: line %d: "
"inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if ( right == NULL || right[ 0 ] == '\0' ) {
fprintf( stderr, "%s: line %d: "
"missing \"=\" in (or value after) \"%s\" "
"in by clause\n",
fname, lineno, left );
acl_usage();
}
if( b->a_sockname_pat.bv_len ) {
fprintf( stderr, "%s: line %d: "
"sockname pattern already specified.\n",
fname, lineno );
acl_usage();
}
b->a_sockname_style = sty;
if (sty == ACL_STYLE_REGEX) {
acl_regex_normalized_dn( right, &bv );
if ( !ber_bvccmp( &bv, '*' ) ) {
regtest(fname, lineno, bv.bv_val);
}
b->a_sockname_pat = bv;
} else {
ber_str2bv( right, 0, 1, &b->a_sockname_pat );
}
continue;
}
if ( strcasecmp( left, "domain" ) == 0 ) {
switch ( sty ) {
case ACL_STYLE_REGEX:
case ACL_STYLE_BASE:
case ACL_STYLE_SUBTREE:
break;
default:
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if ( right == NULL || right[ 0 ] == '\0' ) {
fprintf( stderr,
"%s: line %d: missing \"=\" in (or value after) \"%s\" in by clause\n",
fname, lineno, left );
acl_usage();
}
if( b->a_domain_pat.bv_len ) {
fprintf( stderr,
"%s: line %d: domain pattern already specified.\n",
fname, lineno );
acl_usage();
}
b->a_domain_style = sty;
b->a_domain_expand = expand;
if (sty == ACL_STYLE_REGEX) {
acl_regex_normalized_dn( right, &bv );
if ( !ber_bvccmp( &bv, '*' ) ) {
regtest(fname, lineno, bv.bv_val);
}
b->a_domain_pat = bv;
} else {
ber_str2bv( right, 0, 1, &b->a_domain_pat );
}
continue;
}
if ( strcasecmp( left, "sockurl" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if ( right == NULL || right[ 0 ] == '\0' ) {
fprintf( stderr,
"%s: line %d: missing \"=\" in (or value after) \"%s\" in by clause\n",
fname, lineno, left );
acl_usage();
}
if( b->a_sockurl_pat.bv_len ) {
fprintf( stderr,
"%s: line %d: sockurl pattern already specified.\n",
fname, lineno );
acl_usage();
}
b->a_sockurl_style = sty;
if (sty == ACL_STYLE_REGEX) {
acl_regex_normalized_dn( right, &bv );
if ( !ber_bvccmp( &bv, '*' ) ) {
regtest(fname, lineno, bv.bv_val);
}
b->a_sockurl_pat = bv;
} else {
ber_str2bv( right, 0, 1, &b->a_sockurl_pat );
}
continue;
}
if ( strcasecmp( left, "set" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if( b->a_set_pat.bv_len != 0 ) {
fprintf( stderr,
"%s: line %d: set attribute already specified.\n",
fname, lineno );
acl_usage();
}
if ( right == NULL || *right == '\0' ) {
fprintf( stderr,
"%s: line %d: no set is defined\n",
fname, lineno );
acl_usage();
}
b->a_set_style = sty;
ber_str2bv( right, 0, 1, &b->a_set_pat );
continue;
}
#ifdef SLAPD_ACI_ENABLED
if ( strcasecmp( left, "aci" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if( b->a_aci_at != NULL ) {
fprintf( stderr,
"%s: line %d: aci attribute already specified.\n",
fname, lineno );
acl_usage();
}
if ( right != NULL && *right != '\0' ) {
rc = slap_str2ad( right, &b->a_aci_at, &text );
if( rc != LDAP_SUCCESS ) {
fprintf( stderr,
"%s: line %d: aci \"%s\": %s\n",
fname, lineno, right, text );
acl_usage();
}
} else {
b->a_aci_at = slap_schema.si_ad_aci;
}
if( !is_at_syntax( b->a_aci_at->ad_type,
SLAPD_ACI_SYNTAX) )
{
fprintf( stderr,
"%s: line %d: aci \"%s\": inappropriate syntax: %s\n",
fname, lineno, right,
b->a_aci_at->ad_type->sat_syntax_oid );
acl_usage();
}
continue;
}
#endif /* SLAPD_ACI_ENABLED */
if ( strcasecmp( left, "ssf" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if( b->a_authz.sai_ssf ) {
fprintf( stderr,
"%s: line %d: ssf attribute already specified.\n",
fname, lineno );
acl_usage();
}
if ( right == NULL || *right == '\0' ) {
fprintf( stderr,
"%s: line %d: no ssf is defined\n",
fname, lineno );
acl_usage();
}
b->a_authz.sai_ssf = atoi( right );
if( !b->a_authz.sai_ssf ) {
fprintf( stderr,
"%s: line %d: invalid ssf value (%s)\n",
fname, lineno, right );
acl_usage();
}
continue;
}
if ( strcasecmp( left, "transport_ssf" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if( b->a_authz.sai_transport_ssf ) {
fprintf( stderr,
"%s: line %d: transport_ssf attribute already specified.\n",
fname, lineno );
acl_usage();
}
if ( right == NULL || *right == '\0' ) {
fprintf( stderr,
"%s: line %d: no transport_ssf is defined\n",
fname, lineno );
acl_usage();
}
b->a_authz.sai_transport_ssf = atoi( right );
if( !b->a_authz.sai_transport_ssf ) {
fprintf( stderr,
"%s: line %d: invalid transport_ssf value (%s)\n",
fname, lineno, right );
acl_usage();
}
continue;
}
if ( strcasecmp( left, "tls_ssf" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if( b->a_authz.sai_tls_ssf ) {
fprintf( stderr,
"%s: line %d: tls_ssf attribute already specified.\n",
fname, lineno );
acl_usage();
}
if ( right == NULL || *right == '\0' ) {
fprintf( stderr,
"%s: line %d: no tls_ssf is defined\n",
fname, lineno );
acl_usage();
}
b->a_authz.sai_tls_ssf = atoi( right );
if( !b->a_authz.sai_tls_ssf ) {
fprintf( stderr,
"%s: line %d: invalid tls_ssf value (%s)\n",
fname, lineno, right );
acl_usage();
}
continue;
}
if ( strcasecmp( left, "sasl_ssf" ) == 0 ) {
if (sty != ACL_STYLE_REGEX && sty != ACL_STYLE_BASE) {
fprintf( stderr,
"%s: line %d: inappropriate style \"%s\" in by clause\n",
fname, lineno, style );
acl_usage();
}
if( b->a_authz.sai_sasl_ssf ) {
fprintf( stderr,
"%s: line %d: sasl_ssf attribute already specified.\n",
fname, lineno );
acl_usage();
}
if ( right == NULL || *right == '\0' ) {
fprintf( stderr,
"%s: line %d: no sasl_ssf is defined\n",
fname, lineno );
acl_usage();
}
b->a_authz.sai_sasl_ssf = atoi( right );
if( !b->a_authz.sai_sasl_ssf ) {
fprintf( stderr,
"%s: line %d: invalid sasl_ssf value (%s)\n",
fname, lineno, right );
acl_usage();
}
continue;
}
if( right != NULL ) {
/* unsplit */
right[-1] = '=';
}
break;
}
if( i == argc || ( strcasecmp( left, "stop" ) == 0 )) {
/* out of arguments or plain stop */
ACL_PRIV_ASSIGN(b->a_access_mask, ACL_PRIV_ADDITIVE);
b->a_type = ACL_STOP;
access_append( &a->acl_access, b );
continue;
}
if( strcasecmp( left, "continue" ) == 0 ) {
/* plain continue */
ACL_PRIV_ASSIGN(b->a_access_mask, ACL_PRIV_ADDITIVE);
b->a_type = ACL_CONTINUE;
access_append( &a->acl_access, b );
continue;
}
if( strcasecmp( left, "break" ) == 0 ) {
/* plain continue */
ACL_PRIV_ASSIGN(b->a_access_mask, ACL_PRIV_ADDITIVE);
b->a_type = ACL_BREAK;
access_append( &a->acl_access, b );
continue;
}
if ( strcasecmp( left, "by" ) == 0 ) {
/* we've gone too far */
--i;
ACL_PRIV_ASSIGN(b->a_access_mask, ACL_PRIV_ADDITIVE);
b->a_type = ACL_STOP;
access_append( &a->acl_access, b );
continue;
}
/* get <access> */
if( strncasecmp( left, "self", 4 ) == 0 ) {
b->a_dn_self = 1;
ACL_PRIV_ASSIGN( b->a_access_mask, str2accessmask( &left[4] ) );
} else {
ACL_PRIV_ASSIGN( b->a_access_mask, str2accessmask( left ) );
}
if( ACL_IS_INVALID( b->a_access_mask ) ) {
fprintf( stderr,
"%s: line %d: expecting <access> got \"%s\"\n",
fname, lineno, left );
acl_usage();
}
b->a_type = ACL_STOP;
if( ++i == argc ) {
/* out of arguments or plain stop */
access_append( &a->acl_access, b );
continue;
}
if( strcasecmp( argv[i], "continue" ) == 0 ) {
/* plain continue */
b->a_type = ACL_CONTINUE;
} else if( strcasecmp( argv[i], "break" ) == 0 ) {
/* plain continue */
b->a_type = ACL_BREAK;
} else if ( strcasecmp( argv[i], "stop" ) != 0 ) {
/* gone to far */
i--;
}
access_append( &a->acl_access, b );
} else {
fprintf( stderr,
"%s: line %d: expecting \"to\" or \"by\" got \"%s\"\n",
fname, lineno, argv[i] );
acl_usage();
}
}
/* if we have no real access clause, complain and do nothing */
if ( a == NULL ) {
fprintf( stderr,
"%s: line %d: warning: no access clause(s) specified in access line\n",
fname, lineno );
} else {
#ifdef LDAP_DEBUG
if (ldap_debug & LDAP_DEBUG_ACL)
print_acl(be, a);
#endif
if ( a->acl_access == NULL ) {
fprintf( stderr,
"%s: line %d: warning: no by clause(s) specified in access line\n",
fname, lineno );
}
if ( be != NULL ) {
acl_append( &be->be_acl, a );
} else {
acl_append( &global_acl, a );
}
}
}
char *
accessmask2str( slap_mask_t mask, char *buf )
{
int none=1;
char *ptr = buf;
assert( buf != NULL );
if ( ACL_IS_INVALID( mask ) ) {
return "invalid";
}
buf[0] = '\0';
if ( ACL_IS_LEVEL( mask ) ) {
if ( ACL_LVL_IS_NONE(mask) ) {
ptr = lutil_strcopy( ptr, "none" );
} else if ( ACL_LVL_IS_AUTH(mask) ) {
ptr = lutil_strcopy( ptr, "auth" );
} else if ( ACL_LVL_IS_COMPARE(mask) ) {
ptr = lutil_strcopy( ptr, "compare" );
} else if ( ACL_LVL_IS_SEARCH(mask) ) {
ptr = lutil_strcopy( ptr, "search" );
} else if ( ACL_LVL_IS_READ(mask) ) {
ptr = lutil_strcopy( ptr, "read" );
} else if ( ACL_LVL_IS_WRITE(mask) ) {
ptr = lutil_strcopy( ptr, "write" );
} else {
ptr = lutil_strcopy( ptr, "unknown" );
}
*ptr++ = '(';
}
if( ACL_IS_ADDITIVE( mask ) ) {
*ptr++ = '+';
} else if( ACL_IS_SUBTRACTIVE( mask ) ) {
*ptr++ = '-';
} else {
*ptr++ = '=';
}
if ( ACL_PRIV_ISSET(mask, ACL_PRIV_WRITE) ) {
none = 0;
*ptr++ = 'w';
}
if ( ACL_PRIV_ISSET(mask, ACL_PRIV_READ) ) {
none = 0;
*ptr++ = 'r';
}
if ( ACL_PRIV_ISSET(mask, ACL_PRIV_SEARCH) ) {
none = 0;
*ptr++ = 's';
}
if ( ACL_PRIV_ISSET(mask, ACL_PRIV_COMPARE) ) {
none = 0;
*ptr++ = 'c';
}
if ( ACL_PRIV_ISSET(mask, ACL_PRIV_AUTH) ) {
none = 0;
*ptr++ = 'x';
}
if ( none && ACL_PRIV_ISSET(mask, ACL_PRIV_NONE) ) {
none = 0;
*ptr++ = 'n';
}
if ( none ) {
*ptr++ = '0';
}
if ( ACL_IS_LEVEL( mask ) ) {
*ptr++ = ')';
}
*ptr = '\0';
return buf;
}
slap_mask_t
str2accessmask( const char *str )
{
slap_mask_t mask;
if( !ASCII_ALPHA(str[0]) ) {
int i;
if ( str[0] == '=' ) {
ACL_INIT(mask);
} else if( str[0] == '+' ) {
ACL_PRIV_ASSIGN(mask, ACL_PRIV_ADDITIVE);
} else if( str[0] == '-' ) {
ACL_PRIV_ASSIGN(mask, ACL_PRIV_SUBSTRACTIVE);
} else {
ACL_INVALIDATE(mask);
return mask;
}
for( i=1; str[i] != '\0'; i++ ) {
if( TOLOWER((unsigned char) str[i]) == 'w' ) {
ACL_PRIV_SET(mask, ACL_PRIV_WRITE);
} else if( TOLOWER((unsigned char) str[i]) == 'r' ) {
ACL_PRIV_SET(mask, ACL_PRIV_READ);
} else if( TOLOWER((unsigned char) str[i]) == 's' ) {
ACL_PRIV_SET(mask, ACL_PRIV_SEARCH);
} else if( TOLOWER((unsigned char) str[i]) == 'c' ) {
ACL_PRIV_SET(mask, ACL_PRIV_COMPARE);
} else if( TOLOWER((unsigned char) str[i]) == 'x' ) {
ACL_PRIV_SET(mask, ACL_PRIV_AUTH);
} else if( str[i] != '0' ) {
ACL_INVALIDATE(mask);
return mask;
}
}
return mask;
}
if ( strcasecmp( str, "none" ) == 0 ) {
ACL_LVL_ASSIGN_NONE(mask);
} else if ( strcasecmp( str, "auth" ) == 0 ) {
ACL_LVL_ASSIGN_AUTH(mask);
} else if ( strcasecmp( str, "compare" ) == 0 ) {
ACL_LVL_ASSIGN_COMPARE(mask);
} else if ( strcasecmp( str, "search" ) == 0 ) {
ACL_LVL_ASSIGN_SEARCH(mask);
} else if ( strcasecmp( str, "read" ) == 0 ) {
ACL_LVL_ASSIGN_READ(mask);
} else if ( strcasecmp( str, "write" ) == 0 ) {
ACL_LVL_ASSIGN_WRITE(mask);
} else {
ACL_INVALIDATE( mask );
}
return mask;
}
static void
acl_usage( void )
{
fprintf( stderr, "%s%s\n",
"<access clause> ::= access to <what> "
"[ by <who> <access> [ <control> ] ]+ \n"
"<what> ::= * | [dn[.<dnstyle>]=<DN>] [filter=<filter>] [attrs=<attrlist>]\n"
"<attrlist> ::= <attr> | <attr> , <attrlist>\n"
"<attr> ::= <attrname> | entry | children\n"
"<who> ::= [ * | anonymous | users | self | dn[.<dnstyle>]=<DN> ]\n"
"\t[dnattr=<attrname>]\n"
"\t[group[/<objectclass>[/<attrname>]][.<style>]=<group>]\n"
"\t[peername[.<style>]=<peer>] [sockname[.<style>]=<name>]\n",
"\t[domain[.<style>]=<domain>] [sockurl[.<style>]=<url>]\n"
#ifdef SLAPD_ACI_ENABLED
"\t[aci=<attrname>]\n"
#endif
"\t[ssf=<n>] [transport_ssf=<n>] [tls_ssf=<n>] [sasl_ssf=<n>]\n"
"<dnstyle> ::= base | exact | one | subtree | children | regex\n"
"<style> ::= regex | base | exact\n"
"<access> ::= [self]{<level>|<priv>}\n"
"<level> ::= none | auth | compare | search | read | write\n"
"<priv> ::= {=|+|-}{w|r|s|c|x}+\n"
"<control> ::= [ stop | continue | break ]\n"
);
exit( EXIT_FAILURE );
}
/*
* Set pattern to a "normalized" DN from src.
* At present it simply eats the (optional) space after
* a RDN separator (,)
* Eventually will evolve in a more complete normalization
*/
static void
acl_regex_normalized_dn(
const char *src,
struct berval *pattern
)
{
char *str, *p;
ber_len_t len;
str = ch_strdup( src );
len = strlen( src );
for ( p = str; p && p[ 0 ]; p++ ) {
/* escape */
if ( p[ 0 ] == '\\' && p[ 1 ] ) {
/*
* if escaping a hex pair we should
* increment p twice; however, in that
* case the second hex number does
* no harm
*/
p++;
}
if ( p[ 0 ] == ',' ) {
if ( p[ 1 ] == ' ' ) {
char *q;
/*
* too much space should be
* an error if we are pedantic
*/
for ( q = &p[ 2 ]; q[ 0 ] == ' '; q++ ) {
/* DO NOTHING */ ;
}
AC_MEMCPY( p+1, q, len-(q-str)+1);
}
}
}
pattern->bv_val = str;
pattern->bv_len = p-str;
return;
}
static void
split(
char *line,
int splitchar,
char **left,
char **right
)
{
*left = line;
if ( (*right = strchr( line, splitchar )) != NULL ) {
*((*right)++) = '\0';
}
}
static void
access_append( Access **l, Access *a )
{
for ( ; *l != NULL; l = &(*l)->a_next )
; /* NULL */
*l = a;
}
void
acl_append( AccessControl **l, AccessControl *a )
{
for ( ; *l != NULL; l = &(*l)->acl_next )
; /* NULL */
*l = a;
}
static void
access_free( Access *a )
{
if ( a->a_dn_pat.bv_val )
free ( a->a_dn_pat.bv_val );
if ( a->a_peername_pat.bv_val )
free ( a->a_peername_pat.bv_val );
if ( a->a_sockname_pat.bv_val )
free ( a->a_sockname_pat.bv_val );
if ( a->a_domain_pat.bv_val )
free ( a->a_domain_pat.bv_val );
if ( a->a_sockurl_pat.bv_val )
free ( a->a_sockurl_pat.bv_val );
if ( a->a_set_pat.bv_len )
free ( a->a_set_pat.bv_val );
if ( a->a_group_pat.bv_len )
free ( a->a_group_pat.bv_val );
free( a );
}
void
acl_free( AccessControl *a )
{
Access *n;
AttributeName *an;
if ( a->acl_filter )
filter_free( a->acl_filter );
if ( a->acl_dn_pat.bv_len )
free ( a->acl_dn_pat.bv_val );
if ( a->acl_attrs ) {
for ( an = a->acl_attrs; an->an_name.bv_val; an++ ) {
free( an->an_name.bv_val );
}
free( a->acl_attrs );
}
for (; a->acl_access; a->acl_access = n) {
n = a->acl_access->a_next;
access_free( a->acl_access );
}
free( a );
}
/* Because backend_startup uses acl_append to tack on the global_acl to
* the end of each backend's acl, we cannot just take one argument and
* merrily free our way to the end of the list. backend_destroy calls us
* with the be_acl in arg1, and global_acl in arg2 to give us a stopping
* point. config_destroy calls us with global_acl in arg1 and NULL in
* arg2, so we then proceed to polish off the global_acl.
*/
void
acl_destroy( AccessControl *a, AccessControl *end )
{
AccessControl *n;
for (; a && a!= end; a=n) {
n = a->acl_next;
acl_free( a );
}
}
char *
access2str( slap_access_t access )
{
if ( access == ACL_NONE ) {
return "none";
} else if ( access == ACL_AUTH ) {
return "auth";
} else if ( access == ACL_COMPARE ) {
return "compare";
} else if ( access == ACL_SEARCH ) {
return "search";
} else if ( access == ACL_READ ) {
return "read";
} else if ( access == ACL_WRITE ) {
return "write";
}
return "unknown";
}
slap_access_t
str2access( const char *str )
{
if ( strcasecmp( str, "none" ) == 0 ) {
return ACL_NONE;
} else if ( strcasecmp( str, "auth" ) == 0 ) {
return ACL_AUTH;
} else if ( strcasecmp( str, "compare" ) == 0 ) {
return ACL_COMPARE;
} else if ( strcasecmp( str, "search" ) == 0 ) {
return ACL_SEARCH;
} else if ( strcasecmp( str, "read" ) == 0 ) {
return ACL_READ;
} else if ( strcasecmp( str, "write" ) == 0 ) {
return ACL_WRITE;
}
return( ACL_INVALID_ACCESS );
}
#ifdef LDAP_DEBUG
static char *style_strings[5] = { "regex",
"base", "one", "subtree", "children" };
static void
print_access( Access *b )
{
char maskbuf[ACCESSMASK_MAXLEN];
fprintf( stderr, "\tby" );
if ( b->a_dn_pat.bv_len != 0 ) {
if( strcmp(b->a_dn_pat.bv_val, "*") == 0
|| strcmp(b->a_dn_pat.bv_val, "users") == 0
|| strcmp(b->a_dn_pat.bv_val, "anonymous") == 0
|| strcmp(b->a_dn_pat.bv_val, "self") == 0 )
{
fprintf( stderr, " %s", b->a_dn_pat.bv_val );
} else {
fprintf( stderr, " dn.%s=%s",
style_strings[b->a_dn_style], b->a_dn_pat.bv_val );
}
}
if ( b->a_dn_at != NULL ) {
fprintf( stderr, " dnattr=%s", b->a_dn_at->ad_cname.bv_val );
}
if ( b->a_group_pat.bv_len ) {
fprintf( stderr, " group=%s", b->a_group_pat.bv_val );
if ( b->a_group_oc ) {
fprintf( stderr, " objectClass: %s",
b->a_group_oc->soc_oclass.oc_oid );
if ( b->a_group_at ) {
fprintf( stderr, " attributeType: %s",
b->a_group_at->ad_cname.bv_val );
}
}
}
if ( b->a_peername_pat.bv_len != 0 ) {
fprintf( stderr, " peername=%s", b->a_peername_pat.bv_val );
}
if ( b->a_sockname_pat.bv_len != 0 ) {
fprintf( stderr, " sockname=%s", b->a_sockname_pat.bv_val );
}
if ( b->a_domain_pat.bv_len != 0 ) {
fprintf( stderr, " domain=%s", b->a_domain_pat.bv_val );
}
if ( b->a_sockurl_pat.bv_len != 0 ) {
fprintf( stderr, " sockurl=%s", b->a_sockurl_pat.bv_val );
}
#ifdef SLAPD_ACI_ENABLED
if ( b->a_aci_at != NULL ) {
fprintf( stderr, " aci=%s", b->a_aci_at->ad_cname.bv_val );
}
#endif
/* Security Strength Factors */
if ( b->a_authz.sai_ssf ) {
fprintf( stderr, " ssf=%u",
b->a_authz.sai_ssf );
}
if ( b->a_authz.sai_transport_ssf ) {
fprintf( stderr, " transport_ssf=%u",
b->a_authz.sai_transport_ssf );
}
if ( b->a_authz.sai_tls_ssf ) {
fprintf( stderr, " tls_ssf=%u",
b->a_authz.sai_tls_ssf );
}
if ( b->a_authz.sai_sasl_ssf ) {
fprintf( stderr, " sasl_ssf=%u",
b->a_authz.sai_sasl_ssf );
}
fprintf( stderr, " %s%s",
b->a_dn_self ? "self" : "",
accessmask2str( b->a_access_mask, maskbuf ) );
if( b->a_type == ACL_BREAK ) {
fprintf( stderr, " break" );
} else if( b->a_type == ACL_CONTINUE ) {
fprintf( stderr, " continue" );
} else if( b->a_type != ACL_STOP ) {
fprintf( stderr, " unknown-control" );
}
fprintf( stderr, "\n" );
}
static void
print_acl( Backend *be, AccessControl *a )
{
int to = 0;
Access *b;
fprintf( stderr, "%s ACL: access to",
be == NULL ? "Global" : "Backend" );
if ( a->acl_dn_pat.bv_len != 0 ) {
to++;
fprintf( stderr, " dn.%s=%s\n",
style_strings[a->acl_dn_style], a->acl_dn_pat.bv_val );
}
if ( a->acl_filter != NULL ) {
struct berval bv = { 0, NULL };
to++;
filter2bv( a->acl_filter, &bv );
fprintf( stderr, " filter=%s\n", bv.bv_val );
ch_free( bv.bv_val );
}
if ( a->acl_attrs != NULL ) {
int first = 1;
AttributeName *an;
to++;
fprintf( stderr, " attrs=" );
for ( an = a->acl_attrs; an && an->an_name.bv_val; an++ ) {
if ( ! first ) {
fprintf( stderr, "," );
}
fputs( an->an_name.bv_val, stderr );
first = 0;
}
fprintf( stderr, "\n" );
}
if( !to ) {
fprintf( stderr, " *\n" );
}
for ( b = a->acl_access; b != NULL; b = b->a_next ) {
print_access( b );
}
fprintf( stderr, "\n" );
}
#endif /* LDAP_DEBUG */
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