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openldap/servers/slapd/back-ldap/config.c
Pierangelo Masarati 6eec000889 improve diagnostics
2004-11-17 17:55:44 +00:00

693 lines
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/* config.c - ldap backend configuration file routine */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2003-2004 The OpenLDAP Foundation.
* Portions Copyright 1999-2003 Howard Chu.
* Portions Copyright 2000-2003 Pierangelo Masarati.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by the Howard Chu for inclusion
* in OpenLDAP Software and subsequently enhanced by Pierangelo
* Masarati.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include "slap.h"
#include "back-ldap.h"
#include "lutil.h"
#undef ldap_debug
/* for advanced URL parsing */
#include "../../../libraries/libldap/ldap-int.h"
static SLAP_EXTOP_MAIN_FN ldap_back_exop_whoami;
static int
parse_idassert( BackendDB *be, const char *fname, int lineno,
int argc, char **argv );
int
ldap_back_db_config(
BackendDB *be,
const char *fname,
int lineno,
int argc,
char **argv )
{
struct ldapinfo *li = (struct ldapinfo *) be->be_private;
if ( li == NULL ) {
fprintf( stderr, "%s: line %d: ldap backend info is null!\n",
fname, lineno );
return 1;
}
/* server address to query (depricated, use "uri" directive) */
if ( strcasecmp( argv[0], "server" ) == 0 ) {
ber_len_t l;
fprintf( stderr,
"%s: line %d: \"server <address>\" directive is deprecated\n",
fname, lineno );
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: missing address in \"server <address>\" line\n",
fname, lineno );
return 1;
}
if ( li->url != NULL ) {
ch_free( li->url );
}
l = strlen( argv[1] ) + STRLENOF( "ldap:///") + 1;
li->url = ch_calloc( l, sizeof( char ) );
if ( li->url == NULL ) {
fprintf( stderr, "%s: line %d: malloc failed\n" );
return 1;
}
snprintf( li->url, l, "ldap://%s/", argv[1] );
/* URI of server to query (preferred over "server" directive) */
} else if ( strcasecmp( argv[0], "uri" ) == 0 ) {
LDAPURLDesc *tmpludp;
int urlrc, i;
if ( argc != 2 ) {
fprintf( stderr, "%s: line %d: "
"missing uri "
"in \"uri <uri>\" line\n",
fname, lineno );
return 1;
}
if ( li->url != NULL ) {
ch_free( li->url );
}
if ( li->lud != NULL ) {
ldap_free_urllist( li->lud );
}
#if 0
/* PARANOID: DN and more are not required nor allowed */
urlrc = ldap_url_parselist_ext( &li->lud, argv[ 1 ], "\t" );
#else
urlrc = ldap_url_parselist( &li->lud, argv[ 1 ] );
#endif
if ( urlrc != LDAP_URL_SUCCESS ) {
char *why;
switch ( urlrc ) {
case LDAP_URL_ERR_MEM:
why = "no memory";
break;
case LDAP_URL_ERR_PARAM:
why = "parameter is bad";
break;
case LDAP_URL_ERR_BADSCHEME:
why = "URL doesn't begin with \"[c]ldap[si]://\"";
break;
case LDAP_URL_ERR_BADENCLOSURE:
why = "URL is missing trailing \">\"";
break;
case LDAP_URL_ERR_BADURL:
why = "URL is bad";
case LDAP_URL_ERR_BADHOST:
why = "host/port is bad";
break;
case LDAP_URL_ERR_BADATTRS:
why = "bad (or missing) attributes";
break;
case LDAP_URL_ERR_BADSCOPE:
why = "scope string is invalid (or missing)";
break;
case LDAP_URL_ERR_BADFILTER:
why = "bad or missing filter";
break;
case LDAP_URL_ERR_BADEXTS:
why = "bad or missing extensions";
break;
default:
why = "unknown reason";
break;
}
fprintf( stderr, "%s: line %d: "
"unable to parse uri \"%s\" "
"in \"uri <uri>\" line: %s\n",
fname, lineno, argv[ 1 ], why );
return 1;
}
for ( i = 0, tmpludp = li->lud;
tmpludp;
i++, tmpludp = tmpludp->lud_next )
{
if ( ( tmpludp->lud_dn != NULL
&& tmpludp->lud_dn[0] != '\0' )
|| tmpludp->lud_attrs != NULL
|| tmpludp->lud_filter != NULL
|| tmpludp->lud_exts != NULL )
{
fprintf( stderr, "%s: line %d: "
"warning, only protocol, "
"host and port allowed "
"in \"uri <uri>\" statement "
"for uri #%d of \"%s\"\n",
fname, lineno, i, argv[1] );
}
}
#if 0
for ( tmpludp = li->lud; tmpludp; tmpludp = tmpludp->lud_next ) {
LDAPURLDesc tmplud;
char *tmpurl;
ber_len_t oldlen = 0, len;
tmplud = *tmpludp;
tmplud.lud_dn = "";
tmplud.lud_attrs = NULL;
tmplud.lud_filter = NULL;
if ( !ldap_is_ldapi_url( argv[ 1 ] ) ) {
tmplud.lud_exts = NULL;
tmplud.lud_crit_exts = 0;
}
tmpurl = ldap_url_desc2str( &tmplud );
if ( tmpurl == NULL ) {
fprintf( stderr, "%s: line %d: "
"unable to rebuild uri "
"in \"uri <uri>\" statement "
"for \"%s\"\n",
fname, lineno, argv[ 1 ] );
return 1;
}
len = strlen( tmpurl );
if ( li->url ) {
oldlen = strlen( li->url ) + STRLENOF( " " );
}
li->url = ch_realloc( li->url, oldlen + len + 1);
if ( oldlen ) {
li->url[oldlen - 1] = " ";
}
AC_MEMCPY( &li->url[oldlen], tmpurl, len + 1 );
ch_free( tmpurl );
}
#else
li->url = ch_strdup( argv[ 1 ] );
#endif
/* name to use for ldap_back_group */
} else if ( strcasecmp( argv[0], "acl-authcdn" ) == 0
|| strcasecmp( argv[0], "binddn" ) == 0 ) {
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: missing name in \"%s <name>\" line\n",
fname, lineno, argv[0] );
return( 1 );
}
ber_str2bv( argv[1], 0, 1, &li->acl_authcDN );
/* password to use for ldap_back_group */
} else if ( strcasecmp( argv[0], "acl-passwd" ) == 0
|| strcasecmp( argv[0], "bindpw" ) == 0 ) {
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: missing password in \"%s <password>\" line\n",
fname, lineno, argv[0] );
return( 1 );
}
ber_str2bv( argv[1], 0, 1, &li->acl_passwd );
#ifdef LDAP_BACK_PROXY_AUTHZ
/* identity assertion stuff... */
} else if ( strncasecmp( argv[0], "idassert-", STRLENOF( "idassert-" ) ) == 0
|| strncasecmp( argv[0], "proxyauthz", STRLENOF( "proxyauthz" ) ) == 0 ) {
return parse_idassert( be, fname, lineno, argc, argv );
#endif /* LDAP_BACK_PROXY_AUTHZ */
/* save bind creds for referral rebinds? */
} else if ( strcasecmp( argv[0], "rebind-as-user" ) == 0 ) {
if ( argc != 1 ) {
fprintf( stderr,
"%s: line %d: rebind-as-user takes no arguments\n",
fname, lineno );
return( 1 );
}
li->savecred = 1;
/* intercept exop_who_am_i? */
} else if ( strcasecmp( argv[0], "proxy-whoami" ) == 0 ) {
if ( argc != 1 ) {
fprintf( stderr,
"%s: line %d: proxy-whoami takes no arguments\n",
fname, lineno );
return( 1 );
}
load_extop( (struct berval *)&slap_EXOP_WHOAMI,
0, ldap_back_exop_whoami );
/* FIXME: legacy: intercept old rewrite/remap directives
* and try to start the rwm overlay */
} else if ( strcasecmp( argv[0], "suffixmassage" ) == 0
|| strcasecmp( argv[0], "map" ) == 0
|| strncasecmp( argv[0], "rewrite", STRLENOF( "rewrite" ) ) == 0 )
{
if ( li->rwm_started == 0 ) {
if ( overlay_config( be, "rwm" ) ) {
fprintf( stderr, "%s: line %d: "
"unable to configure the \"rwm\" "
"overlay, required by directive "
"\"%s\".\n",
fname, lineno, argv[0] );
#if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
fprintf( stderr, "\thint: try loading the \"rwm.la\" dynamic module.\n" );
#endif /* SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC */
return( 1 );
}
fprintf( stderr, "%s: line %d: back-ldap: "
"automatically starting \"rwm\" overlay, "
"triggered by \"%s\" directive.\n",
fname, lineno, argv[ 0 ] );
li->rwm_started = 1;
return ( *be->bd_info->bi_db_config )( be, fname, lineno, argc, argv );
}
return SLAP_CONF_UNKNOWN;
/* anything else */
} else {
return SLAP_CONF_UNKNOWN;
}
return 0;
}
static int
ldap_back_exop_whoami(
Operation *op,
SlapReply *rs )
{
struct berval *bv = NULL;
if ( op->oq_extended.rs_reqdata != NULL ) {
/* no request data should be provided */
rs->sr_text = "no request data expected";
return rs->sr_err = LDAP_PROTOCOL_ERROR;
}
rs->sr_err = backend_check_restrictions( op, rs,
(struct berval *)&slap_EXOP_WHOAMI );
if( rs->sr_err != LDAP_SUCCESS ) return rs->sr_err;
/* if auth'd by back-ldap and request is proxied, forward it */
if ( op->o_conn->c_authz_backend && !strcmp(op->o_conn->c_authz_backend->be_type, "ldap" ) && !dn_match(&op->o_ndn, &op->o_conn->c_ndn)) {
struct ldapconn *lc;
LDAPControl c, *ctrls[2] = {NULL, NULL};
LDAPMessage *res;
Operation op2 = *op;
ber_int_t msgid;
int do_retry = 1;
ctrls[0] = &c;
op2.o_ndn = op->o_conn->c_ndn;
lc = ldap_back_getconn(&op2, rs);
if (!lc || !ldap_back_dobind( lc, op, rs )) {
return -1;
}
c.ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
c.ldctl_iscritical = 1;
c.ldctl_value.bv_val = ch_malloc(op->o_ndn.bv_len+4);
c.ldctl_value.bv_len = op->o_ndn.bv_len + 3;
strcpy(c.ldctl_value.bv_val, "dn:");
strcpy(c.ldctl_value.bv_val+3, op->o_ndn.bv_val);
retry:
rs->sr_err = ldap_whoami(lc->lc_ld, ctrls, NULL, &msgid);
if (rs->sr_err == LDAP_SUCCESS) {
if (ldap_result(lc->lc_ld, msgid, 1, NULL, &res) == -1) {
ldap_get_option(lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
&rs->sr_err);
if ( rs->sr_err == LDAP_SERVER_DOWN && do_retry ) {
do_retry = 0;
if ( ldap_back_retry( lc, op, rs ) )
goto retry;
}
ldap_back_freeconn( op, lc );
lc = NULL;
} else {
rs->sr_err = ldap_parse_whoami(lc->lc_ld, res, &bv);
ldap_msgfree(res);
}
}
ch_free(c.ldctl_value.bv_val);
if (rs->sr_err != LDAP_SUCCESS) {
rs->sr_err = slap_map_api2result( rs );
}
} else {
/* else just do the same as before */
bv = (struct berval *) ch_malloc( sizeof(struct berval) );
if ( !BER_BVISEMPTY( &op->o_dn ) ) {
bv->bv_len = op->o_dn.bv_len + sizeof("dn:") - 1;
bv->bv_val = ch_malloc( bv->bv_len + 1 );
AC_MEMCPY( bv->bv_val, "dn:", sizeof("dn:") - 1 );
AC_MEMCPY( &bv->bv_val[sizeof("dn:") - 1], op->o_dn.bv_val,
op->o_dn.bv_len );
bv->bv_val[bv->bv_len] = '\0';
} else {
bv->bv_len = 0;
bv->bv_val = NULL;
}
}
rs->sr_rspdata = bv;
return rs->sr_err;
}
#ifdef LDAP_BACK_PROXY_AUTHZ
static int
parse_idassert(
BackendDB *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
struct ldapinfo *li = (struct ldapinfo *) be->be_private;
/* identity assertion mode */
if ( strcasecmp( argv[0], "idassert-mode" ) == 0 ) {
if ( argc < 2 ) {
Debug( LDAP_DEBUG_ANY,
"%s: line %d: illegal args number %d in \"idassert-mode <args> [<flag> [...]]\" line.\n",
fname, lineno, argc );
return 1;
}
if ( strcasecmp( argv[1], "legacy" ) == 0 ) {
/* will proxyAuthz as client's identity only if bound */
li->idassert_mode = LDAP_BACK_IDASSERT_LEGACY;
} else if ( strcasecmp( argv[1], "self" ) == 0 ) {
/* will proxyAuthz as client's identity */
li->idassert_mode = LDAP_BACK_IDASSERT_SELF;
} else if ( strcasecmp( argv[1], "anonymous" ) == 0 ) {
/* will proxyAuthz as anonymous */
li->idassert_mode = LDAP_BACK_IDASSERT_ANONYMOUS;
} else if ( strcasecmp( argv[1], "none" ) == 0 ) {
/* will not proxyAuthz */
li->idassert_mode = LDAP_BACK_IDASSERT_NOASSERT;
} else {
struct berval id;
int rc;
/* will proxyAuthz as argv[1] */
ber_str2bv( argv[1], 0, 0, &id );
if ( strncasecmp( id.bv_val, "u:", STRLENOF( "u:" ) ) == 0 ) {
/* force lowercase... */
id.bv_val[0] = 'u';
li->idassert_mode = LDAP_BACK_IDASSERT_OTHERID;
ber_dupbv( &li->idassert_authzID, &id );
} else {
struct berval dn;
/* default is DN? */
if ( strncasecmp( id.bv_val, "dn:", STRLENOF( "dn:" ) ) == 0 ) {
id.bv_val += STRLENOF( "dn:" );
id.bv_len -= STRLENOF( "dn:" );
}
rc = dnNormalize( 0, NULL, NULL, &id, &dn, NULL );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY,
"%s: line %d: idassert ID \"%s\" is not a valid DN\n",
fname, lineno, argv[1] );
return 1;
}
li->idassert_authzID.bv_len = STRLENOF( "dn:" ) + dn.bv_len;
li->idassert_authzID.bv_val = ch_malloc( li->idassert_authzID.bv_len + 1 );
AC_MEMCPY( li->idassert_authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
AC_MEMCPY( &li->idassert_authzID.bv_val[ STRLENOF( "dn:" ) ], dn.bv_val, dn.bv_len + 1 );
ch_free( dn.bv_val );
li->idassert_mode = LDAP_BACK_IDASSERT_OTHERDN;
}
}
for ( argc -= 2, argv += 2; argc--; argv++ ) {
if ( strcasecmp( argv[0], "override" ) == 0 ) {
li->idassert_flags |= LDAP_BACK_AUTH_OVERRIDE;
} else {
Debug( LDAP_DEBUG_ANY,
"%s: line %d: unknown flag \"%s\" "
"in \"idassert-mode <args> "
"[<flags>]\" line.\n",
fname, lineno, argv[0] );
return 1;
}
}
/* name to use for proxyAuthz propagation */
} else if ( strcasecmp( argv[0], "idassert-authcdn" ) == 0
|| strcasecmp( argv[0], "proxyauthzdn" ) == 0 )
{
struct berval dn;
int rc;
/* FIXME: "proxyauthzdn" is no longer documented, and
* temporarily supported for backwards compatibility */
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: missing name in \"%s <name>\" line\n",
fname, lineno, argv[0] );
return( 1 );
}
if ( !BER_BVISNULL( &li->idassert_authcDN ) ) {
fprintf( stderr, "%s: line %d: "
"authcDN already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_authcDN.bv_val );
}
ber_str2bv( argv[1], 0, 0, &dn );
rc = dnNormalize( 0, NULL, NULL, &dn, &li->idassert_authcDN, NULL );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY,
"%s: line %d: idassert ID \"%s\" is not a valid DN\n",
fname, lineno, argv[1] );
return 1;
}
/* password to use for proxyAuthz propagation */
} else if ( strcasecmp( argv[0], "idassert-passwd" ) == 0
|| strcasecmp( argv[0], "proxyauthzpw" ) == 0 )
{
/* FIXME: "proxyauthzpw" is no longer documented, and
* temporarily supported for backwards compatibility */
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: missing password in \"%s <password>\" line\n",
fname, lineno, argv[0] );
return( 1 );
}
if ( !BER_BVISNULL( &li->idassert_passwd ) ) {
fprintf( stderr, "%s: line %d: "
"passwd already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_passwd.bv_val );
}
ber_str2bv( argv[1], 0, 1, &li->idassert_passwd );
/* rules to accept identity assertion... */
} else if ( strcasecmp( argv[0], "idassert-authzFrom" ) == 0 ) {
struct berval rule;
ber_str2bv( argv[1], 0, 1, &rule );
ber_bvarray_add( &li->idassert_authz, &rule );
} else if ( strcasecmp( argv[0], "idassert-method" ) == 0 ) {
if ( argc < 2 ) {
fprintf( stderr,
"%s: line %d: missing method in \"%s <method>\" line\n",
fname, lineno, argv[0] );
return( 1 );
}
if ( strcasecmp( argv[1], "none" ) == 0 ) {
/* FIXME: is this useful? */
li->idassert_authmethod = LDAP_AUTH_NONE;
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: trailing args in \"%s %s ...\" line ignored\"\n",
fname, lineno, argv[0], argv[1] );
}
} else if ( strcasecmp( argv[1], "simple" ) == 0 ) {
li->idassert_authmethod = LDAP_AUTH_SIMPLE;
if ( argc != 2 ) {
fprintf( stderr,
"%s: line %d: trailing args in \"%s %s ...\" line ignored\"\n",
fname, lineno, argv[0], argv[1] );
}
} else if ( strcasecmp( argv[1], "sasl" ) == 0 ) {
#ifdef HAVE_CYRUS_SASL
int arg;
for ( arg = 2; arg < argc; arg++ ) {
if ( strncasecmp( argv[arg], "mech=", STRLENOF( "mech=" ) ) == 0 ) {
char *val = argv[arg] + STRLENOF( "mech=" );
if ( !BER_BVISNULL( &li->idassert_sasl_mech ) ) {
fprintf( stderr, "%s: line %d: "
"SASL mech already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_sasl_mech.bv_val );
}
ber_str2bv( val, 0, 1, &li->idassert_sasl_mech );
} else if ( strncasecmp( argv[arg], "realm=", STRLENOF( "realm=" ) ) == 0 ) {
char *val = argv[arg] + STRLENOF( "realm=" );
if ( !BER_BVISNULL( &li->idassert_sasl_realm ) ) {
fprintf( stderr, "%s: line %d: "
"SASL realm already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_sasl_realm.bv_val );
}
ber_str2bv( val, 0, 1, &li->idassert_sasl_realm );
} else if ( strncasecmp( argv[arg], "authcdn=", STRLENOF( "authcdn=" ) ) == 0 ) {
char *val = argv[arg] + STRLENOF( "authcdn=" );
struct berval dn;
int rc;
if ( !BER_BVISNULL( &li->idassert_authcDN ) ) {
fprintf( stderr, "%s: line %d: "
"SASL authcDN already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_authcDN.bv_val );
}
if ( strncasecmp( argv[arg], "dn:", STRLENOF( "dn:" ) ) == 0 ) {
val += STRLENOF( "dn:" );
}
ber_str2bv( val, 0, 0, &dn );
rc = dnNormalize( 0, NULL, NULL, &dn, &li->idassert_authcDN, NULL );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_ANY,
"%s: line %d: SASL authcdn \"%s\" is not a valid DN\n",
fname, lineno, val );
return 1;
}
} else if ( strncasecmp( argv[arg], "authcid=", STRLENOF( "authcid=" ) ) == 0 ) {
char *val = argv[arg] + STRLENOF( "authcid=" );
if ( !BER_BVISNULL( &li->idassert_authcID ) ) {
fprintf( stderr, "%s: line %d: "
"SASL authcID already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_authcID.bv_val );
}
if ( strncasecmp( argv[arg], "u:", STRLENOF( "u:" ) ) == 0 ) {
val += STRLENOF( "u:" );
}
ber_str2bv( val, 0, 1, &li->idassert_authcID );
} else if ( strncasecmp( argv[arg], "cred=", STRLENOF( "cred=" ) ) == 0 ) {
char *val = argv[arg] + STRLENOF( "cred=" );
if ( !BER_BVISNULL( &li->idassert_passwd ) ) {
fprintf( stderr, "%s: line %d: "
"SASL cred already defined; replacing...\n",
fname, lineno );
ch_free( li->idassert_passwd.bv_val );
}
ber_str2bv( val, 0, 1, &li->idassert_passwd );
} else if ( strncasecmp( argv[arg], "authz=", STRLENOF( "authz=" ) ) == 0 ) {
char *val = argv[arg] + STRLENOF( "authz=" );
if ( strcasecmp( val, "proxyauthz" ) == 0 ) {
li->idassert_flags &= ~LDAP_BACK_AUTH_NATIVE_AUTHZ;
} else if ( strcasecmp( val, "native" ) == 0 ) {
li->idassert_flags |= LDAP_BACK_AUTH_NATIVE_AUTHZ;
} else {
fprintf( stderr, "%s: line %s: "
"unknown authz mode \"%s\"\n",
fname, lineno, val );
return 1;
}
} else {
fprintf( stderr, "%s: line %d: "
"unknown SASL parameter %s\n",
fname, lineno, argv[arg] );
return 1;
}
}
li->idassert_authmethod = LDAP_AUTH_SASL;
#else /* !HAVE_CYRUS_SASL */
fprintf( stderr, "%s: line %d: "
"compile --with-cyrus-sasl to enable SASL auth\n",
fname, lineno );
return 1;
#endif /* !HAVE_CYRUS_SASL */
} else {
fprintf( stderr, "%s: line %d: "
"unhandled idassert-method method %s\n",
fname, lineno, argv[1] );
return 1;
}
} else {
return SLAP_CONF_UNKNOWN;
}
return 0;
}
#endif /* LDAP_BACK_PROXY_AUTHZ */
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