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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:35:32 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:35:32 +0000
commit5ea77a75dd2d2158401331879f3c8f47940a732c (patch)
treed89dc06e9f4850a900f161e25f84e922c4f86cc8 /servers/slapd/saslauthz.c
parentInitial commit. (diff)
downloadopenldap-5ea77a75dd2d2158401331879f3c8f47940a732c.tar.xz
openldap-5ea77a75dd2d2158401331879f3c8f47940a732c.zip
Adding upstream version 2.5.13+dfsg.upstream/2.5.13+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'servers/slapd/saslauthz.c')
-rw-r--r--servers/slapd/saslauthz.c2193
1 files changed, 2193 insertions, 0 deletions
diff --git a/servers/slapd/saslauthz.c b/servers/slapd/saslauthz.c
new file mode 100644
index 0000000..797f287
--- /dev/null
+++ b/servers/slapd/saslauthz.c
@@ -0,0 +1,2193 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 The OpenLDAP Foundation.
+ * Portions Copyright 2000 Mark Adamson, Carnegie Mellon.
+ * 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>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/ctype.h>
+
+#include "slap.h"
+
+#include "lutil.h"
+#include "slap-config.h"
+
+#define SASLREGEX_REPLACE 10
+
+#define LDAP_X_SCOPE_EXACT ((ber_int_t) 0x0010)
+#define LDAP_X_SCOPE_REGEX ((ber_int_t) 0x0020)
+#define LDAP_X_SCOPE_CHILDREN ((ber_int_t) 0x0030)
+#define LDAP_X_SCOPE_SUBTREE ((ber_int_t) 0x0040)
+#define LDAP_X_SCOPE_ONELEVEL ((ber_int_t) 0x0050)
+#define LDAP_X_SCOPE_GROUP ((ber_int_t) 0x0060)
+#define LDAP_X_SCOPE_USERS ((ber_int_t) 0x0070)
+
+/*
+ * IDs in DNauthzid form can now have a type specifier, that
+ * influences how they are used in related operations.
+ *
+ * syntax: dn[.{exact|regex}]:<val>
+ *
+ * dn.exact: the value must pass normalization and is used
+ * in exact DN match.
+ * dn.regex: the value is treated as a regular expression
+ * in matching DN values in authz{To|From}
+ * attributes.
+ * dn: for backwards compatibility reasons, the value
+ * is treated as a regular expression, and thus
+ * it is not normalized nor validated; it is used
+ * in exact or regex comparisons based on the
+ * context.
+ *
+ * IDs in DNauthzid form can now have a type specifier, that
+ * influences how they are used in related operations.
+ *
+ * syntax: u[.mech[/realm]]:<val>
+ *
+ * where mech is a SIMPLE, AUTHZ, or a SASL mechanism name
+ * and realm is mechanism specific realm (separate to those
+ * which are representable as part of the principal).
+ */
+
+typedef struct sasl_regexp {
+ char *sr_match; /* regexp match pattern */
+ char *sr_replace; /* regexp replace pattern */
+} SaslRegexp_t;
+
+static int nSaslRegexp = 0;
+static SaslRegexp_t *SaslRegexp = NULL;
+
+#include "rewrite.h"
+struct rewrite_info *sasl_rwinfo = NULL;
+#define AUTHID_CONTEXT "authid"
+static BerVarray authz_rewrites = NULL;
+
+/* What SASL proxy authorization policies are allowed? */
+#define SASL_AUTHZ_NONE 0x00
+#define SASL_AUTHZ_FROM 0x01
+#define SASL_AUTHZ_TO 0x02
+#define SASL_AUTHZ_AND 0x10
+
+static const char *policy_txt[] = {
+ "none", "from", "to", "any"
+};
+
+static int authz_policy = SASL_AUTHZ_NONE;
+
+static int
+slap_sasl_match( Operation *opx, struct berval *rule,
+ struct berval *assertDN, struct berval *authc );
+
+int slap_sasl_setpolicy( const char *arg )
+{
+ int rc = LDAP_SUCCESS;
+
+ if ( strcasecmp( arg, "none" ) == 0 ) {
+ authz_policy = SASL_AUTHZ_NONE;
+ } else if ( strcasecmp( arg, "from" ) == 0 ) {
+ authz_policy = SASL_AUTHZ_FROM;
+ } else if ( strcasecmp( arg, "to" ) == 0 ) {
+ authz_policy = SASL_AUTHZ_TO;
+ } else if ( strcasecmp( arg, "both" ) == 0 || strcasecmp( arg, "any" ) == 0 ) {
+ authz_policy = SASL_AUTHZ_FROM | SASL_AUTHZ_TO;
+ } else if ( strcasecmp( arg, "all" ) == 0 ) {
+ authz_policy = SASL_AUTHZ_FROM | SASL_AUTHZ_TO | SASL_AUTHZ_AND;
+ } else {
+ rc = LDAP_OTHER;
+ }
+ return rc;
+}
+
+const char * slap_sasl_getpolicy()
+{
+ if ( authz_policy == (SASL_AUTHZ_FROM | SASL_AUTHZ_TO | SASL_AUTHZ_AND) )
+ return "all";
+ else
+ return policy_txt[authz_policy];
+}
+
+int slap_parse_user( struct berval *id, struct berval *user,
+ struct berval *realm, struct berval *mech )
+{
+ char u;
+
+ assert( id != NULL );
+ assert( !BER_BVISNULL( id ) );
+ assert( user != NULL );
+ assert( realm != NULL );
+ assert( mech != NULL );
+
+ u = id->bv_val[ 0 ];
+
+ if ( u != 'u' && u != 'U' ) {
+ /* called with something other than u: */
+ return LDAP_PROTOCOL_ERROR;
+ }
+
+ /* uauthzid form:
+ * u[.mech[/realm]]:user
+ */
+
+ user->bv_val = ber_bvchr( id, ':' );
+ if ( BER_BVISNULL( user ) ) {
+ return LDAP_PROTOCOL_ERROR;
+ }
+ user->bv_val[ 0 ] = '\0';
+ user->bv_val++;
+ user->bv_len = id->bv_len - ( user->bv_val - id->bv_val );
+
+ if ( id->bv_val[1] == '.' ) {
+ id->bv_val[1] = '\0';
+ mech->bv_val = id->bv_val + 2;
+ mech->bv_len = user->bv_val - mech->bv_val - 1;
+
+ realm->bv_val = ber_bvchr( mech, '/' );
+
+ if ( !BER_BVISNULL( realm ) ) {
+ realm->bv_val[ 0 ] = '\0';
+ realm->bv_val++;
+ mech->bv_len = realm->bv_val - mech->bv_val - 1;
+ realm->bv_len = user->bv_val - realm->bv_val - 1;
+ }
+
+ } else {
+ BER_BVZERO( mech );
+ BER_BVZERO( realm );
+ }
+
+ if ( id->bv_val[ 1 ] != '\0' ) {
+ return LDAP_PROTOCOL_ERROR;
+ }
+
+ if ( !BER_BVISNULL( mech ) ) {
+ if ( mech->bv_val != id->bv_val + 2 )
+ return LDAP_PROTOCOL_ERROR;
+
+ AC_MEMCPY( mech->bv_val - 2, mech->bv_val, mech->bv_len + 1 );
+ mech->bv_val -= 2;
+ }
+
+ if ( !BER_BVISNULL( realm ) ) {
+ if ( realm->bv_val < id->bv_val + 2 )
+ return LDAP_PROTOCOL_ERROR;
+
+ AC_MEMCPY( realm->bv_val - 2, realm->bv_val, realm->bv_len + 1 );
+ realm->bv_val -= 2;
+ }
+
+ /* leave "u:" before user */
+ user->bv_val -= 2;
+ user->bv_len += 2;
+ user->bv_val[ 0 ] = u;
+ user->bv_val[ 1 ] = ':';
+
+ return LDAP_SUCCESS;
+}
+
+int
+authzValidate(
+ Syntax *syntax,
+ struct berval *in )
+{
+ struct berval bv;
+ int rc = LDAP_INVALID_SYNTAX;
+ LDAPURLDesc *ludp = NULL;
+ int scope = -1;
+
+ /*
+ * 1) <DN>
+ * 2) dn[.{exact|children|subtree|onelevel}]:{*|<DN>}
+ * 3) dn.regex:<pattern>
+ * 4) u[.mech[/realm]]:<ID>
+ * 5) group[/<groupClass>[/<memberAttr>]]:<DN>
+ * 6) <URL>
+ */
+
+ assert( in != NULL );
+ assert( !BER_BVISNULL( in ) );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "authzValidate: parsing %s\n", in->bv_val );
+
+ /*
+ * 2) dn[.{exact|children|subtree|onelevel}]:{*|<DN>}
+ * 3) dn.regex:<pattern>
+ *
+ * <DN> must pass DN normalization
+ */
+ if ( !strncasecmp( in->bv_val, "dn", STRLENOF( "dn" ) ) ) {
+ bv.bv_val = in->bv_val + STRLENOF( "dn" );
+
+ if ( bv.bv_val[ 0 ] == '.' ) {
+ bv.bv_val++;
+
+ if ( !strncasecmp( bv.bv_val, "exact:", STRLENOF( "exact:" ) ) ) {
+ bv.bv_val += STRLENOF( "exact:" );
+ scope = LDAP_X_SCOPE_EXACT;
+
+ } else if ( !strncasecmp( bv.bv_val, "regex:", STRLENOF( "regex:" ) ) ) {
+ bv.bv_val += STRLENOF( "regex:" );
+ scope = LDAP_X_SCOPE_REGEX;
+
+ } else if ( !strncasecmp( bv.bv_val, "children:", STRLENOF( "children:" ) ) ) {
+ bv.bv_val += STRLENOF( "children:" );
+ scope = LDAP_X_SCOPE_CHILDREN;
+
+ } else if ( !strncasecmp( bv.bv_val, "subtree:", STRLENOF( "subtree:" ) ) ) {
+ bv.bv_val += STRLENOF( "subtree:" );
+ scope = LDAP_X_SCOPE_SUBTREE;
+
+ } else if ( !strncasecmp( bv.bv_val, "onelevel:", STRLENOF( "onelevel:" ) ) ) {
+ bv.bv_val += STRLENOF( "onelevel:" );
+ scope = LDAP_X_SCOPE_ONELEVEL;
+
+ } else {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ } else {
+ if ( bv.bv_val[ 0 ] != ':' ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+ scope = LDAP_X_SCOPE_EXACT;
+ bv.bv_val++;
+ }
+
+ bv.bv_val += strspn( bv.bv_val, " " );
+ /* jump here in case no type specification was present
+ * and uri was not an URI... HEADS-UP: assuming EXACT */
+is_dn: bv.bv_len = in->bv_len - ( bv.bv_val - in->bv_val );
+
+ /* a single '*' means any DN without using regexes */
+ if ( ber_bvccmp( &bv, '*' ) ) {
+ /* LDAP_X_SCOPE_USERS */
+ return LDAP_SUCCESS;
+ }
+
+ switch ( scope ) {
+ case LDAP_X_SCOPE_EXACT:
+ case LDAP_X_SCOPE_CHILDREN:
+ case LDAP_X_SCOPE_SUBTREE:
+ case LDAP_X_SCOPE_ONELEVEL:
+ return dnValidate( NULL, &bv );
+
+ case LDAP_X_SCOPE_REGEX:
+ return LDAP_SUCCESS;
+ }
+
+ return rc;
+
+ /*
+ * 4) u[.mech[/realm]]:<ID>
+ */
+ } else if ( ( in->bv_val[ 0 ] == 'u' || in->bv_val[ 0 ] == 'U' )
+ && ( in->bv_val[ 1 ] == ':'
+ || in->bv_val[ 1 ] == '/'
+ || in->bv_val[ 1 ] == '.' ) )
+ {
+ char buf[ SLAP_LDAPDN_MAXLEN ];
+ struct berval id,
+ user = BER_BVNULL,
+ realm = BER_BVNULL,
+ mech = BER_BVNULL;
+
+ if ( sizeof( buf ) <= in->bv_len ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ id.bv_len = in->bv_len;
+ id.bv_val = buf;
+ strncpy( buf, in->bv_val, sizeof( buf ) );
+
+ rc = slap_parse_user( &id, &user, &realm, &mech );
+ if ( rc != LDAP_SUCCESS ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ return rc;
+
+ /*
+ * 5) group[/groupClass[/memberAttr]]:<DN>
+ *
+ * <groupClass> defaults to "groupOfNames"
+ * <memberAttr> defaults to "member"
+ *
+ * <DN> must pass DN normalization
+ */
+ } else if ( strncasecmp( in->bv_val, "group", STRLENOF( "group" ) ) == 0 )
+ {
+ struct berval group_dn = BER_BVNULL,
+ group_oc = BER_BVNULL,
+ member_at = BER_BVNULL;
+
+ bv.bv_val = in->bv_val + STRLENOF( "group" );
+ bv.bv_len = in->bv_len - STRLENOF( "group" );
+ group_dn.bv_val = ber_bvchr( &bv, ':' );
+ if ( group_dn.bv_val == NULL ) {
+ /* last chance: assume it's a(n exact) DN ... */
+ bv.bv_val = in->bv_val;
+ scope = LDAP_X_SCOPE_EXACT;
+ goto is_dn;
+ }
+
+ /*
+ * FIXME: we assume that "member" and "groupOfNames"
+ * are present in schema...
+ */
+ if ( bv.bv_val[ 0 ] == '/' ) {
+ group_oc.bv_val = &bv.bv_val[ 1 ];
+ group_oc.bv_len = group_dn.bv_val - group_oc.bv_val;
+
+ member_at.bv_val = ber_bvchr( &group_oc, '/' );
+ if ( member_at.bv_val ) {
+ AttributeDescription *ad = NULL;
+ const char *text = NULL;
+
+ group_oc.bv_len = member_at.bv_val - group_oc.bv_val;
+ member_at.bv_val++;
+ member_at.bv_len = group_dn.bv_val - member_at.bv_val;
+ rc = slap_bv2ad( &member_at, &ad, &text );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+ }
+
+ if ( oc_bvfind( &group_oc ) == NULL ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+ }
+
+ group_dn.bv_val++;
+ group_dn.bv_len = in->bv_len - ( group_dn.bv_val - in->bv_val );
+
+ rc = dnValidate( NULL, &group_dn );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ return rc;
+ }
+
+ /*
+ * ldap:///<base>??<scope>?<filter>
+ * <scope> ::= {base|one|subtree}
+ *
+ * <scope> defaults to "base"
+ * <base> must pass DN normalization
+ * <filter> must pass str2filter()
+ */
+ rc = ldap_url_parse( in->bv_val, &ludp );
+ switch ( rc ) {
+ case LDAP_URL_SUCCESS:
+ /* FIXME: the check is pedantic, but I think it's necessary,
+ * because people tend to use things like ldaps:// which
+ * gives the idea SSL is being used. Maybe we could
+ * accept ldapi:// as well, but the point is that we use
+ * an URL as an easy means to define bits of a search with
+ * little parsing.
+ */
+ if ( strcasecmp( ludp->lud_scheme, "ldap" ) != 0 ) {
+ /*
+ * must be ldap:///
+ */
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+ break;
+
+ case LDAP_URL_ERR_BADSCHEME:
+ /*
+ * last chance: assume it's a(n exact) DN ...
+ *
+ * NOTE: must pass DN normalization
+ */
+ ldap_free_urldesc( ludp );
+ bv.bv_val = in->bv_val;
+ scope = LDAP_X_SCOPE_EXACT;
+ goto is_dn;
+
+ default:
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ if ( ( ludp->lud_host && *ludp->lud_host )
+ || ludp->lud_attrs || ludp->lud_exts )
+ {
+ /* host part must be empty */
+ /* attrs and extensions parts must be empty */
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ /* Grab the filter */
+ if ( ludp->lud_filter ) {
+ Filter *f = str2filter( ludp->lud_filter );
+ if ( f == NULL ) {
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+ filter_free( f );
+ }
+
+ /* Grab the searchbase */
+ if ( ludp->lud_dn != NULL ) {
+ ber_str2bv( ludp->lud_dn, 0, 0, &bv );
+ rc = dnValidate( NULL, &bv );
+ } else {
+ rc = LDAP_INVALID_SYNTAX;
+ }
+
+done:
+ ldap_free_urldesc( ludp );
+ return( rc );
+}
+
+static int
+authzPrettyNormal(
+ struct berval *val,
+ struct berval *normalized,
+ void *ctx,
+ int normalize )
+{
+ struct berval bv;
+ int rc = LDAP_INVALID_SYNTAX;
+ LDAPURLDesc *ludp = NULL;
+ char *lud_dn = NULL,
+ *lud_filter = NULL;
+ int scope = -1;
+
+ /*
+ * 1) <DN>
+ * 2) dn[.{exact|children|subtree|onelevel}]:{*|<DN>}
+ * 3) dn.regex:<pattern>
+ * 4) u[.mech[/realm]]:<ID>
+ * 5) group[/<groupClass>[/<memberAttr>]]:<DN>
+ * 6) <URL>
+ */
+
+ assert( val != NULL );
+ assert( !BER_BVISNULL( val ) );
+ BER_BVZERO( normalized );
+
+ /*
+ * 2) dn[.{exact|children|subtree|onelevel}]:{*|<DN>}
+ * 3) dn.regex:<pattern>
+ *
+ * <DN> must pass DN normalization
+ */
+ if ( !strncasecmp( val->bv_val, "dn", STRLENOF( "dn" ) ) ) {
+ struct berval out = BER_BVNULL,
+ prefix = BER_BVNULL;
+ char *ptr;
+
+ bv.bv_val = val->bv_val + STRLENOF( "dn" );
+
+ if ( bv.bv_val[ 0 ] == '.' ) {
+ bv.bv_val++;
+
+ if ( !strncasecmp( bv.bv_val, "exact:", STRLENOF( "exact:" ) ) ) {
+ bv.bv_val += STRLENOF( "exact:" );
+ scope = LDAP_X_SCOPE_EXACT;
+
+ } else if ( !strncasecmp( bv.bv_val, "regex:", STRLENOF( "regex:" ) ) ) {
+ bv.bv_val += STRLENOF( "regex:" );
+ scope = LDAP_X_SCOPE_REGEX;
+
+ } else if ( !strncasecmp( bv.bv_val, "children:", STRLENOF( "children:" ) ) ) {
+ bv.bv_val += STRLENOF( "children:" );
+ scope = LDAP_X_SCOPE_CHILDREN;
+
+ } else if ( !strncasecmp( bv.bv_val, "subtree:", STRLENOF( "subtree:" ) ) ) {
+ bv.bv_val += STRLENOF( "subtree:" );
+ scope = LDAP_X_SCOPE_SUBTREE;
+
+ } else if ( !strncasecmp( bv.bv_val, "onelevel:", STRLENOF( "onelevel:" ) ) ) {
+ bv.bv_val += STRLENOF( "onelevel:" );
+ scope = LDAP_X_SCOPE_ONELEVEL;
+
+ } else {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ } else {
+ if ( bv.bv_val[ 0 ] != ':' ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+ scope = LDAP_X_SCOPE_EXACT;
+ bv.bv_val++;
+ }
+
+ bv.bv_val += strspn( bv.bv_val, " " );
+ /* jump here in case no type specification was present
+ * and uri was not an URI... HEADS-UP: assuming EXACT */
+is_dn: bv.bv_len = val->bv_len - ( bv.bv_val - val->bv_val );
+
+ /* a single '*' means any DN without using regexes */
+ if ( ber_bvccmp( &bv, '*' ) ) {
+ ber_str2bv_x( "dn:*", STRLENOF( "dn:*" ), 1, normalized, ctx );
+ return LDAP_SUCCESS;
+ }
+
+ switch ( scope ) {
+ case LDAP_X_SCOPE_EXACT:
+ case LDAP_X_SCOPE_CHILDREN:
+ case LDAP_X_SCOPE_SUBTREE:
+ case LDAP_X_SCOPE_ONELEVEL:
+ if ( normalize ) {
+ rc = dnNormalize( 0, NULL, NULL, &bv, &out, ctx );
+ } else {
+ rc = dnPretty( NULL, &bv, &out, ctx );
+ }
+ if( rc != LDAP_SUCCESS ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+ break;
+
+ case LDAP_X_SCOPE_REGEX:
+ normalized->bv_len = STRLENOF( "dn.regex:" ) + bv.bv_len;
+ normalized->bv_val = ber_memalloc_x( normalized->bv_len + 1, ctx );
+ ptr = lutil_strcopy( normalized->bv_val, "dn.regex:" );
+ ptr = lutil_strncopy( ptr, bv.bv_val, bv.bv_len );
+ ptr[ 0 ] = '\0';
+ return LDAP_SUCCESS;
+
+ default:
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ /* prepare prefix */
+ switch ( scope ) {
+ case LDAP_X_SCOPE_EXACT:
+ BER_BVSTR( &prefix, "dn:" );
+ break;
+
+ case LDAP_X_SCOPE_CHILDREN:
+ BER_BVSTR( &prefix, "dn.children:" );
+ break;
+
+ case LDAP_X_SCOPE_SUBTREE:
+ BER_BVSTR( &prefix, "dn.subtree:" );
+ break;
+
+ case LDAP_X_SCOPE_ONELEVEL:
+ BER_BVSTR( &prefix, "dn.onelevel:" );
+ break;
+
+ default:
+ assert( 0 );
+ break;
+ }
+
+ normalized->bv_len = prefix.bv_len + out.bv_len;
+ normalized->bv_val = ber_memalloc_x( normalized->bv_len + 1, ctx );
+
+ ptr = lutil_strcopy( normalized->bv_val, prefix.bv_val );
+ ptr = lutil_strncopy( ptr, out.bv_val, out.bv_len );
+ ptr[ 0 ] = '\0';
+ ber_memfree_x( out.bv_val, ctx );
+
+ return LDAP_SUCCESS;
+
+ /*
+ * 4) u[.mech[/realm]]:<ID>
+ */
+ } else if ( ( val->bv_val[ 0 ] == 'u' || val->bv_val[ 0 ] == 'U' )
+ && ( val->bv_val[ 1 ] == ':'
+ || val->bv_val[ 1 ] == '/'
+ || val->bv_val[ 1 ] == '.' ) )
+ {
+ char buf[ SLAP_LDAPDN_MAXLEN ];
+ struct berval id,
+ user = BER_BVNULL,
+ realm = BER_BVNULL,
+ mech = BER_BVNULL;
+
+ if ( sizeof( buf ) <= val->bv_len ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ id.bv_len = val->bv_len;
+ id.bv_val = buf;
+ strncpy( buf, val->bv_val, sizeof( buf ) );
+
+ rc = slap_parse_user( &id, &user, &realm, &mech );
+ if ( rc != LDAP_SUCCESS ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ ber_dupbv_x( normalized, val, ctx );
+
+ return rc;
+
+ /*
+ * 5) group[/groupClass[/memberAttr]]:<DN>
+ *
+ * <groupClass> defaults to "groupOfNames"
+ * <memberAttr> defaults to "member"
+ *
+ * <DN> must pass DN normalization
+ */
+ } else if ( strncasecmp( val->bv_val, "group", STRLENOF( "group" ) ) == 0 )
+ {
+ struct berval group_dn = BER_BVNULL,
+ group_oc = BER_BVNULL,
+ member_at = BER_BVNULL,
+ out = BER_BVNULL;
+ char *ptr;
+
+ bv.bv_val = val->bv_val + STRLENOF( "group" );
+ bv.bv_len = val->bv_len - STRLENOF( "group" );
+ group_dn.bv_val = ber_bvchr( &bv, ':' );
+ if ( group_dn.bv_val == NULL ) {
+ /* last chance: assume it's a(n exact) DN ... */
+ bv.bv_val = val->bv_val;
+ scope = LDAP_X_SCOPE_EXACT;
+ goto is_dn;
+ }
+
+ /*
+ * FIXME: we assume that "member" and "groupOfNames"
+ * are present in schema...
+ */
+ if ( bv.bv_val[ 0 ] == '/' ) {
+ ObjectClass *oc = NULL;
+
+ group_oc.bv_val = &bv.bv_val[ 1 ];
+ group_oc.bv_len = group_dn.bv_val - group_oc.bv_val;
+
+ member_at.bv_val = ber_bvchr( &group_oc, '/' );
+ if ( member_at.bv_val ) {
+ AttributeDescription *ad = NULL;
+ const char *text = NULL;
+
+ group_oc.bv_len = member_at.bv_val - group_oc.bv_val;
+ member_at.bv_val++;
+ member_at.bv_len = group_dn.bv_val - member_at.bv_val;
+ rc = slap_bv2ad( &member_at, &ad, &text );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ member_at = ad->ad_cname;
+
+ }
+
+ oc = oc_bvfind( &group_oc );
+ if ( oc == NULL ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ group_oc = oc->soc_cname;
+ }
+
+ group_dn.bv_val++;
+ group_dn.bv_len = val->bv_len - ( group_dn.bv_val - val->bv_val );
+
+ if ( normalize ) {
+ rc = dnNormalize( 0, NULL, NULL, &group_dn, &out, ctx );
+ } else {
+ rc = dnPretty( NULL, &group_dn, &out, ctx );
+ }
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ normalized->bv_len = STRLENOF( "group" ":" ) + out.bv_len;
+ if ( !BER_BVISNULL( &group_oc ) ) {
+ normalized->bv_len += STRLENOF( "/" ) + group_oc.bv_len;
+ if ( !BER_BVISNULL( &member_at ) ) {
+ normalized->bv_len += STRLENOF( "/" ) + member_at.bv_len;
+ }
+ }
+
+ normalized->bv_val = ber_memalloc_x( normalized->bv_len + 1, ctx );
+ ptr = lutil_strcopy( normalized->bv_val, "group" );
+ if ( !BER_BVISNULL( &group_oc ) ) {
+ ptr[ 0 ] = '/';
+ ptr++;
+ ptr = lutil_strncopy( ptr, group_oc.bv_val, group_oc.bv_len );
+ if ( !BER_BVISNULL( &member_at ) ) {
+ ptr[ 0 ] = '/';
+ ptr++;
+ ptr = lutil_strncopy( ptr, member_at.bv_val, member_at.bv_len );
+ }
+ }
+ ptr[ 0 ] = ':';
+ ptr++;
+ ptr = lutil_strncopy( ptr, out.bv_val, out.bv_len );
+ ptr[ 0 ] = '\0';
+ ber_memfree_x( out.bv_val, ctx );
+
+ return rc;
+ }
+
+ /*
+ * ldap:///<base>??<scope>?<filter>
+ * <scope> ::= {base|one|subtree}
+ *
+ * <scope> defaults to "base"
+ * <base> must pass DN normalization
+ * <filter> must pass str2filter()
+ */
+ rc = ldap_url_parse( val->bv_val, &ludp );
+ switch ( rc ) {
+ case LDAP_URL_SUCCESS:
+ /* FIXME: the check is pedantic, but I think it's necessary,
+ * because people tend to use things like ldaps:// which
+ * gives the idea SSL is being used. Maybe we could
+ * accept ldapi:// as well, but the point is that we use
+ * an URL as an easy means to define bits of a search with
+ * little parsing.
+ */
+ if ( strcasecmp( ludp->lud_scheme, "ldap" ) != 0 ) {
+ /*
+ * must be ldap:///
+ */
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ AC_MEMCPY( ludp->lud_scheme, "ldap", STRLENOF( "ldap" ) );
+ break;
+
+ case LDAP_URL_ERR_BADSCHEME:
+ /*
+ * last chance: assume it's a(n exact) DN ...
+ *
+ * NOTE: must pass DN normalization
+ */
+ ldap_free_urldesc( ludp );
+ bv.bv_val = val->bv_val;
+ scope = LDAP_X_SCOPE_EXACT;
+ goto is_dn;
+
+ default:
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ if ( ( ludp->lud_host && *ludp->lud_host )
+ || ludp->lud_attrs || ludp->lud_exts )
+ {
+ /* host part must be empty */
+ /* attrs and extensions parts must be empty */
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ /* Grab the filter */
+ if ( ludp->lud_filter ) {
+ struct berval filterstr;
+ Filter *f;
+
+ lud_filter = ludp->lud_filter;
+
+ f = str2filter( lud_filter );
+ if ( f == NULL ) {
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+ filter2bv( f, &filterstr );
+ filter_free( f );
+ if ( BER_BVISNULL( &filterstr ) ) {
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ ludp->lud_filter = filterstr.bv_val;
+ }
+
+ /* Grab the searchbase */
+ if ( ludp->lud_dn ) {
+ struct berval out = BER_BVNULL;
+
+ lud_dn = ludp->lud_dn;
+
+ ber_str2bv( lud_dn, 0, 0, &bv );
+ if ( normalize ) {
+ rc = dnNormalize( 0, NULL, NULL, &bv, &out, ctx );
+ } else {
+ rc = dnPretty( NULL, &bv, &out, ctx );
+ }
+
+ if ( rc != LDAP_SUCCESS ) {
+ goto done;
+ }
+
+ ludp->lud_dn = out.bv_val;
+ } else {
+ rc = LDAP_INVALID_SYNTAX;
+ goto done;
+ }
+
+ ludp->lud_port = 0;
+ normalized->bv_val = ldap_url_desc2str( ludp );
+ if ( normalized->bv_val ) {
+ normalized->bv_len = strlen( normalized->bv_val );
+
+ } else {
+ rc = LDAP_INVALID_SYNTAX;
+ }
+
+done:
+ if ( lud_filter ) {
+ if ( ludp->lud_filter != lud_filter ) {
+ ber_memfree( ludp->lud_filter );
+ }
+ ludp->lud_filter = lud_filter;
+ }
+
+ if ( lud_dn ) {
+ if ( ludp->lud_dn != lud_dn ) {
+ slap_sl_free( ludp->lud_dn, ctx );
+ }
+ ludp->lud_dn = lud_dn;
+ }
+
+ ldap_free_urldesc( ludp );
+
+ return( rc );
+}
+
+int
+authzNormalize(
+ slap_mask_t usage,
+ Syntax *syntax,
+ MatchingRule *mr,
+ struct berval *val,
+ struct berval *normalized,
+ void *ctx )
+{
+ int rc;
+
+ Debug( LDAP_DEBUG_TRACE, ">>> authzNormalize: <%s>\n",
+ val->bv_val );
+
+ rc = authzPrettyNormal( val, normalized, ctx, 1 );
+
+ Debug( LDAP_DEBUG_TRACE, "<<< authzNormalize: <%s> (%d)\n",
+ normalized->bv_val, rc );
+
+ return rc;
+}
+
+int
+authzPretty(
+ Syntax *syntax,
+ struct berval *val,
+ struct berval *out,
+ void *ctx)
+{
+ int rc;
+
+ Debug( LDAP_DEBUG_TRACE, ">>> authzPretty: <%s>\n",
+ val->bv_val );
+
+ rc = authzPrettyNormal( val, out, ctx, 0 );
+
+ Debug( LDAP_DEBUG_TRACE, "<<< authzPretty: <%s> (%d)\n",
+ out->bv_val ? out->bv_val : "(null)" , rc );
+
+ return rc;
+}
+
+
+static int
+slap_parseURI(
+ Operation *op,
+ struct berval *uri,
+ struct berval *base,
+ struct berval *nbase,
+ int *scope,
+ Filter **filter,
+ struct berval *fstr,
+ int normalize )
+{
+ struct berval bv;
+ int rc;
+ LDAPURLDesc *ludp;
+
+ struct berval idx;
+
+ assert( uri != NULL && !BER_BVISNULL( uri ) );
+ BER_BVZERO( base );
+ BER_BVZERO( nbase );
+ BER_BVZERO( fstr );
+ *scope = -1;
+ *filter = NULL;
+
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_parseURI: parsing %s\n", uri->bv_val );
+
+ rc = LDAP_PROTOCOL_ERROR;
+
+ idx = *uri;
+ if ( idx.bv_val[ 0 ] == '{' ) {
+ char *ptr;
+
+ ptr = ber_bvchr( &idx, '}' ) + 1;
+
+ assert( ptr != (void *)1 );
+
+ idx.bv_len -= ptr - idx.bv_val;
+ idx.bv_val = ptr;
+ uri = &idx;
+ }
+
+ /*
+ * dn[.<dnstyle>]:<dnpattern>
+ * <dnstyle> ::= {exact|regex|children|subtree|onelevel}
+ *
+ * <dnstyle> defaults to "exact"
+ * if <dnstyle> is not "regex", <dnpattern> must pass DN normalization
+ */
+ if ( !strncasecmp( uri->bv_val, "dn", STRLENOF( "dn" ) ) ) {
+ bv.bv_val = uri->bv_val + STRLENOF( "dn" );
+
+ if ( bv.bv_val[ 0 ] == '.' ) {
+ bv.bv_val++;
+
+ if ( !strncasecmp( bv.bv_val, "exact:", STRLENOF( "exact:" ) ) ) {
+ bv.bv_val += STRLENOF( "exact:" );
+ *scope = LDAP_X_SCOPE_EXACT;
+
+ } else if ( !strncasecmp( bv.bv_val, "regex:", STRLENOF( "regex:" ) ) ) {
+ bv.bv_val += STRLENOF( "regex:" );
+ *scope = LDAP_X_SCOPE_REGEX;
+
+ } else if ( !strncasecmp( bv.bv_val, "children:", STRLENOF( "children:" ) ) ) {
+ bv.bv_val += STRLENOF( "children:" );
+ *scope = LDAP_X_SCOPE_CHILDREN;
+
+ } else if ( !strncasecmp( bv.bv_val, "subtree:", STRLENOF( "subtree:" ) ) ) {
+ bv.bv_val += STRLENOF( "subtree:" );
+ *scope = LDAP_X_SCOPE_SUBTREE;
+
+ } else if ( !strncasecmp( bv.bv_val, "onelevel:", STRLENOF( "onelevel:" ) ) ) {
+ bv.bv_val += STRLENOF( "onelevel:" );
+ *scope = LDAP_X_SCOPE_ONELEVEL;
+
+ } else {
+ return LDAP_PROTOCOL_ERROR;
+ }
+
+ } else {
+ if ( bv.bv_val[ 0 ] != ':' ) {
+ return LDAP_PROTOCOL_ERROR;
+ }
+ *scope = LDAP_X_SCOPE_EXACT;
+ bv.bv_val++;
+ }
+
+ bv.bv_val += strspn( bv.bv_val, " " );
+ /* jump here in case no type specification was present
+ * and uri was not an URI... HEADS-UP: assuming EXACT */
+is_dn: bv.bv_len = uri->bv_len - (bv.bv_val - uri->bv_val);
+
+ /* a single '*' means any DN without using regexes */
+ if ( ber_bvccmp( &bv, '*' ) ) {
+ *scope = LDAP_X_SCOPE_USERS;
+ }
+
+ switch ( *scope ) {
+ case LDAP_X_SCOPE_EXACT:
+ case LDAP_X_SCOPE_CHILDREN:
+ case LDAP_X_SCOPE_SUBTREE:
+ case LDAP_X_SCOPE_ONELEVEL:
+ if ( normalize ) {
+ rc = dnNormalize( 0, NULL, NULL, &bv, nbase, op->o_tmpmemctx );
+ if( rc != LDAP_SUCCESS ) {
+ *scope = -1;
+ }
+ } else {
+ ber_dupbv_x( nbase, &bv, op->o_tmpmemctx );
+ rc = LDAP_SUCCESS;
+ }
+ break;
+
+ case LDAP_X_SCOPE_REGEX:
+ ber_dupbv_x( nbase, &bv, op->o_tmpmemctx );
+
+ case LDAP_X_SCOPE_USERS:
+ rc = LDAP_SUCCESS;
+ break;
+
+ default:
+ *scope = -1;
+ break;
+ }
+
+ return rc;
+
+ /*
+ * u:<uid>
+ */
+ } else if ( ( uri->bv_val[ 0 ] == 'u' || uri->bv_val[ 0 ] == 'U' )
+ && ( uri->bv_val[ 1 ] == ':'
+ || uri->bv_val[ 1 ] == '/'
+ || uri->bv_val[ 1 ] == '.' ) )
+ {
+ Connection c = *op->o_conn;
+ char buf[ SLAP_LDAPDN_MAXLEN ];
+ struct berval id,
+ user = BER_BVNULL,
+ realm = BER_BVNULL,
+ mech = BER_BVNULL;
+
+ if ( sizeof( buf ) <= uri->bv_len ) {
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ id.bv_len = uri->bv_len;
+ id.bv_val = buf;
+ strncpy( buf, uri->bv_val, sizeof( buf ) );
+
+ rc = slap_parse_user( &id, &user, &realm, &mech );
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ if ( !BER_BVISNULL( &mech ) ) {
+ c.c_sasl_bind_mech = mech;
+ } else {
+ BER_BVSTR( &c.c_sasl_bind_mech, "AUTHZ" );
+ }
+
+ rc = slap_sasl_getdn( &c, op, &user,
+ realm.bv_val, nbase, SLAP_GETDN_AUTHZID );
+
+ if ( rc == LDAP_SUCCESS ) {
+ *scope = LDAP_X_SCOPE_EXACT;
+ }
+
+ return rc;
+
+ /*
+ * group[/<groupoc>[/<groupat>]]:<groupdn>
+ *
+ * groupoc defaults to "groupOfNames"
+ * groupat defaults to "member"
+ *
+ * <groupdn> must pass DN normalization
+ */
+ } else if ( strncasecmp( uri->bv_val, "group", STRLENOF( "group" ) ) == 0 )
+ {
+ struct berval group_dn = BER_BVNULL,
+ group_oc = BER_BVNULL,
+ member_at = BER_BVNULL;
+ char *tmp;
+
+ bv.bv_val = uri->bv_val + STRLENOF( "group" );
+ bv.bv_len = uri->bv_len - STRLENOF( "group" );
+ group_dn.bv_val = ber_bvchr( &bv, ':' );
+ if ( group_dn.bv_val == NULL ) {
+ /* last chance: assume it's a(n exact) DN ... */
+ bv.bv_val = uri->bv_val;
+ *scope = LDAP_X_SCOPE_EXACT;
+ goto is_dn;
+ }
+
+ if ( bv.bv_val[ 0 ] == '/' ) {
+ group_oc.bv_val = &bv.bv_val[ 1 ];
+ group_oc.bv_len = group_dn.bv_val - group_oc.bv_val;
+
+ member_at.bv_val = ber_bvchr( &group_oc, '/' );
+ if ( member_at.bv_val ) {
+ group_oc.bv_len = member_at.bv_val - group_oc.bv_val;
+ member_at.bv_val++;
+ member_at.bv_len = group_dn.bv_val - member_at.bv_val;
+
+ } else {
+ BER_BVSTR( &member_at, SLAPD_GROUP_ATTR );
+ }
+
+ } else {
+ BER_BVSTR( &group_oc, SLAPD_GROUP_CLASS );
+ BER_BVSTR( &member_at, SLAPD_GROUP_ATTR );
+ }
+ group_dn.bv_val++;
+ group_dn.bv_len = uri->bv_len - ( group_dn.bv_val - uri->bv_val );
+
+ if ( normalize ) {
+ rc = dnNormalize( 0, NULL, NULL, &group_dn, nbase, op->o_tmpmemctx );
+ if ( rc != LDAP_SUCCESS ) {
+ *scope = -1;
+ return rc;
+ }
+ } else {
+ ber_dupbv_x( nbase, &group_dn, op->o_tmpmemctx );
+ rc = LDAP_SUCCESS;
+ }
+ *scope = LDAP_X_SCOPE_GROUP;
+
+ /* FIXME: caller needs to add value of member attribute
+ * and close brackets twice */
+ fstr->bv_len = STRLENOF( "(&(objectClass=)(=" /* )) */ )
+ + group_oc.bv_len + member_at.bv_len;
+ fstr->bv_val = ch_malloc( fstr->bv_len + 1 );
+
+ tmp = lutil_strncopy( fstr->bv_val, "(&(objectClass=" /* )) */ ,
+ STRLENOF( "(&(objectClass=" /* )) */ ) );
+ tmp = lutil_strncopy( tmp, group_oc.bv_val, group_oc.bv_len );
+ tmp = lutil_strncopy( tmp, /* ( */ ")(" /* ) */ ,
+ STRLENOF( /* ( */ ")(" /* ) */ ) );
+ tmp = lutil_strncopy( tmp, member_at.bv_val, member_at.bv_len );
+ tmp = lutil_strncopy( tmp, "=", STRLENOF( "=" ) );
+
+ return rc;
+ }
+
+ /*
+ * ldap:///<base>??<scope>?<filter>
+ * <scope> ::= {base|one|subtree}
+ *
+ * <scope> defaults to "base"
+ * <base> must pass DN normalization
+ * <filter> must pass str2filter()
+ */
+ rc = ldap_url_parse( uri->bv_val, &ludp );
+ switch ( rc ) {
+ case LDAP_URL_SUCCESS:
+ /* FIXME: the check is pedantic, but I think it's necessary,
+ * because people tend to use things like ldaps:// which
+ * gives the idea SSL is being used. Maybe we could
+ * accept ldapi:// as well, but the point is that we use
+ * an URL as an easy means to define bits of a search with
+ * little parsing.
+ */
+ if ( strcasecmp( ludp->lud_scheme, "ldap" ) != 0 ) {
+ /*
+ * must be ldap:///
+ */
+ rc = LDAP_PROTOCOL_ERROR;
+ goto done;
+ }
+ break;
+
+ case LDAP_URL_ERR_BADSCHEME:
+ /*
+ * last chance: assume it's a(n exact) DN ...
+ *
+ * NOTE: must pass DN normalization
+ */
+ ldap_free_urldesc( ludp );
+ bv.bv_val = uri->bv_val;
+ *scope = LDAP_X_SCOPE_EXACT;
+ goto is_dn;
+
+ default:
+ rc = LDAP_PROTOCOL_ERROR;
+ goto done;
+ }
+
+ if ( ( ludp->lud_host && *ludp->lud_host )
+ || ludp->lud_attrs || ludp->lud_exts )
+ {
+ /* host part must be empty */
+ /* attrs and extensions parts must be empty */
+ rc = LDAP_PROTOCOL_ERROR;
+ goto done;
+ }
+
+ /* Grab the scope */
+ *scope = ludp->lud_scope;
+
+ /* Grab the filter */
+ if ( ludp->lud_filter ) {
+ *filter = str2filter_x( op, ludp->lud_filter );
+ if ( *filter == NULL ) {
+ rc = LDAP_PROTOCOL_ERROR;
+ goto done;
+ }
+ ber_str2bv( ludp->lud_filter, 0, 0, fstr );
+ }
+
+ /* Grab the searchbase */
+ ber_str2bv( ludp->lud_dn, 0, 0, base );
+ if ( normalize ) {
+ rc = dnNormalize( 0, NULL, NULL, base, nbase, op->o_tmpmemctx );
+ } else {
+ ber_dupbv_x( nbase, base, op->o_tmpmemctx );
+ rc = LDAP_SUCCESS;
+ }
+
+done:
+ if( rc != LDAP_SUCCESS ) {
+ if( *filter ) {
+ filter_free_x( op, *filter, 1 );
+ *filter = NULL;
+ }
+ BER_BVZERO( base );
+ BER_BVZERO( fstr );
+ } else {
+ /* Don't free these, return them to caller */
+ ludp->lud_filter = NULL;
+ ludp->lud_dn = NULL;
+ }
+
+ ldap_free_urldesc( ludp );
+ return( rc );
+}
+
+static int slap_sasl_rewrite_config_argv(
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv
+)
+{
+ int rc;
+ char *argv0 = NULL;
+
+ if ( strncasecmp( argv[0], "authid-", STRLENOF( "authid-" ) ) == 0 ) {
+ /* strip "authid-" prefix for parsing */
+ argv0 = argv[0];
+ argv[0] = &argv0[ STRLENOF( "authid-" ) ];
+ }
+
+ /* init at first call */
+ if ( sasl_rwinfo == NULL ) {
+ sasl_rwinfo = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
+ }
+
+ rc = rewrite_parse( sasl_rwinfo, fname, lineno, argc, argv );
+
+ if ( argv0 )
+ argv[0] = argv0;
+
+ return rc;
+}
+
+static int slap_sasl_rewrite_config_bv(
+ const char *fname,
+ int lineno,
+ struct berval bv
+)
+{
+ int rc;
+ ConfigArgs ca = { 0 };
+
+ ca.line = bv.bv_val;
+ ca.argc = 0;
+ config_fp_parse_line( &ca );
+
+ rc = slap_sasl_rewrite_config_argv( fname, lineno, ca.argc, ca.argv );
+
+ ch_free( ca.tline );
+ ch_free( ca.argv );
+
+ return rc;
+}
+
+static void
+slap_sasl_rewrite_bva_add(
+ BerVarray *bva,
+ int idx,
+ int argc,
+ char **argv
+)
+{
+ char *line, *s;
+ struct berval bv;
+
+ if ( argc > 1 ) {
+ /* quote all args but the first */
+ line = ldap_charray2str( argv, "\" \"" );
+ ber_str2bv( line, 0, 0, &bv );
+ s = ber_bvchr( &bv, '"' );
+ assert( s != NULL );
+
+ /* move the trailing quote of argv[0] to the end */
+ AC_MEMCPY( s, s + 1, bv.bv_len - ( s - bv.bv_val ) );
+ bv.bv_val[ bv.bv_len - 1 ] = '"';
+ } else {
+ ber_str2bv( argv[ 0 ], 0, 1, &bv );
+ }
+
+ if ( idx == -1 ) {
+ ber_bvarray_add( bva, &bv );
+ } else {
+ (*bva)[ idx ] = bv;
+ }
+}
+
+static int
+slap_sasl_rewrite_destroy( void )
+{
+ if ( sasl_rwinfo ) {
+ rewrite_info_delete( &sasl_rwinfo );
+ sasl_rwinfo = NULL;
+ }
+
+ return 0;
+}
+
+int slap_sasl_rewrite_config(
+ const char *fname,
+ int lineno,
+ int argc,
+ char **argv,
+ int valx
+)
+{
+ int rc, i, last;
+ char *line;
+ struct berval bv;
+ struct rewrite_info *rw = sasl_rwinfo;
+
+ for ( last = 0; authz_rewrites && !BER_BVISNULL( &authz_rewrites[ last ] ); last++ )
+ /* count'em */ ;
+
+ if ( valx == -1 || valx >= last ) {
+ valx = -1;
+ rc = slap_sasl_rewrite_config_argv( fname, lineno, argc, argv );
+ if ( rc == 0 ) {
+ slap_sasl_rewrite_bva_add( &authz_rewrites, valx, argc, argv );
+ }
+ return rc;
+ }
+
+ sasl_rwinfo = NULL;
+
+ for ( i = 0; i < valx; i++ )
+ {
+ rc = slap_sasl_rewrite_config_bv( fname, lineno, authz_rewrites[ i ] );
+ assert( rc == 0 );
+ }
+
+ rc = slap_sasl_rewrite_config_argv( fname, lineno, argc, argv );
+ if ( rc != 0 ) {
+ slap_sasl_rewrite_destroy();
+ sasl_rwinfo = rw;
+ return 1;
+ }
+
+ for ( i = valx; authz_rewrites && !BER_BVISNULL( &authz_rewrites[ i ] ); i++ )
+ {
+ rc = slap_sasl_rewrite_config_bv( fname, lineno, authz_rewrites[ i ] );
+ assert( rc == 0 );
+ }
+
+ authz_rewrites = ch_realloc( authz_rewrites,
+ ( last + 2 )*sizeof( struct berval ) );
+ BER_BVZERO( &authz_rewrites[ last + 1 ] );
+
+ for ( i = last - 1; i >= valx; i-- )
+ {
+ authz_rewrites[ i + 1 ] = authz_rewrites[ i ];
+ }
+
+ slap_sasl_rewrite_bva_add( &authz_rewrites, valx, argc, argv );
+
+ if ( rw )
+ rewrite_info_delete( &rw );
+
+ return rc;
+}
+
+int slap_sasl_rewrite_delete( int valx ) {
+ int rc, i;
+
+ if ( valx == -1 ) {
+ slap_sasl_rewrite_destroy();
+ if ( authz_rewrites ) {
+ ber_bvarray_free( authz_rewrites );
+ authz_rewrites = NULL;
+ }
+ return 0;
+ }
+
+ for ( i = 0; !BER_BVISNULL( &authz_rewrites[ i ] ); i++ )
+ /* count'em */ ;
+
+ if ( valx >= i ) {
+ return 1;
+ }
+
+ ber_memfree( authz_rewrites[ i ].bv_val );
+ for ( i = valx; !BER_BVISNULL( &authz_rewrites[ i + 1 ] ); i++ )
+ {
+ authz_rewrites[ i ] = authz_rewrites[ i + 1 ];
+ }
+ BER_BVZERO( &authz_rewrites[ i ] );
+
+ slap_sasl_rewrite_destroy();
+
+ for ( i = 0; !BER_BVISNULL( &authz_rewrites[ i ] ); i++ )
+ {
+ rc = slap_sasl_rewrite_config_bv( "slapd", 0, authz_rewrites[ i ] );
+ assert( rc == 0 );
+ }
+
+ return rc;
+}
+
+int slap_sasl_rewrite_unparse( BerVarray *bva ) {
+ if ( authz_rewrites ) {
+ return slap_bv_x_ordered_unparse( authz_rewrites, bva );
+ }
+ return 0;
+}
+
+static int
+slap_sasl_regexp_rewrite_config(
+ struct rewrite_info **rwinfo,
+ const char *fname,
+ int lineno,
+ const char *match,
+ const char *replace,
+ const char *context )
+{
+ int rc;
+ char *argvRule[] = { "rewriteRule", NULL, NULL, ":@", NULL };
+ struct rewrite_info *rw = *rwinfo;
+
+ /* init at first call */
+ if ( rw == NULL ) {
+ char *argvEngine[] = { "rewriteEngine", "on", NULL };
+ char *argvContext[] = { "rewriteContext", NULL, NULL };
+
+ /* initialize rewrite engine */
+ rw = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
+
+ /* switch on rewrite engine */
+ rc = rewrite_parse( rw, fname, lineno, 2, argvEngine );
+ if (rc != LDAP_SUCCESS) {
+ goto out;
+ }
+
+ /* create generic authid context */
+ argvContext[1] = AUTHID_CONTEXT;
+ rc = rewrite_parse( rw, fname, lineno, 2, argvContext );
+ if (rc != LDAP_SUCCESS) {
+ goto out;
+ }
+ }
+
+ argvRule[1] = (char *)match;
+ argvRule[2] = (char *)replace;
+ rc = rewrite_parse( rw, fname, lineno, 4, argvRule );
+out:
+ if (rc == LDAP_SUCCESS) {
+ *rwinfo = rw;
+ } else {
+ rewrite_info_delete( &rw );
+ }
+
+ return rc;
+}
+
+int slap_sasl_regexp_config( const char *match, const char *replace, int valx )
+{
+ int i, rc;
+ SaslRegexp_t sr;
+ struct rewrite_info *rw = NULL;
+
+ if ( valx < 0 || valx > nSaslRegexp )
+ valx = nSaslRegexp;
+
+ for ( i = 0; i < valx; i++) {
+ rc = slap_sasl_regexp_rewrite_config( &rw, "sasl-regexp", 0,
+ SaslRegexp[i].sr_match,
+ SaslRegexp[i].sr_replace,
+ AUTHID_CONTEXT);
+ assert( rc == 0 );
+ }
+
+ rc = slap_sasl_regexp_rewrite_config( &rw, "sasl-regexp", 0,
+ match, replace, AUTHID_CONTEXT );
+
+ if ( rc == LDAP_SUCCESS ) {
+ SaslRegexp = (SaslRegexp_t *) ch_realloc( (char *) SaslRegexp,
+ (nSaslRegexp + 1) * sizeof(SaslRegexp_t) );
+
+ for ( i = nSaslRegexp; i > valx; i-- ) {
+ SaslRegexp[i] = SaslRegexp[i - 1];
+ }
+
+ SaslRegexp[i] = sr;
+ SaslRegexp[i].sr_match = ch_strdup( match );
+ SaslRegexp[i].sr_replace = ch_strdup( replace );
+
+ nSaslRegexp++;
+
+ for ( i = valx + 1; i < nSaslRegexp; i++ ) {
+ rc = slap_sasl_regexp_rewrite_config( &rw, "sasl-regexp", 0,
+ SaslRegexp[i].sr_match,
+ SaslRegexp[i].sr_replace,
+ AUTHID_CONTEXT);
+ assert( rc == 0 );
+ }
+
+ slap_sasl_rewrite_destroy();
+ sasl_rwinfo = rw;
+ } else if ( rw ) {
+ rewrite_info_delete( &rw );
+ }
+
+ return rc;
+}
+
+static void
+slap_sasl_regexp_destroy_one( int n )
+{
+ ch_free( SaslRegexp[ n ].sr_match );
+ ch_free( SaslRegexp[ n ].sr_replace );
+}
+
+void
+slap_sasl_regexp_destroy( void )
+{
+ if ( SaslRegexp ) {
+ int n;
+
+ for ( n = 0; n < nSaslRegexp; n++ ) {
+ slap_sasl_regexp_destroy_one( n );
+ }
+
+ ch_free( SaslRegexp );
+ SaslRegexp = NULL;
+ nSaslRegexp = 0;
+ }
+
+ slap_sasl_rewrite_destroy();
+}
+
+int slap_sasl_regexp_delete( int valx )
+{
+ int rc = 0;
+
+ if ( valx >= nSaslRegexp ) {
+ rc = 1;
+ } else if ( valx < 0 || nSaslRegexp == 1 ) {
+ slap_sasl_regexp_destroy();
+ } else {
+ int i;
+
+ slap_sasl_regexp_destroy_one( valx );
+ nSaslRegexp--;
+
+ for ( i = valx; i < nSaslRegexp; i++ ) {
+ SaslRegexp[ i ] = SaslRegexp[ i + 1 ];
+ }
+
+ slap_sasl_rewrite_destroy();
+ for ( i = 0; i < nSaslRegexp; i++ ) {
+ rc = slap_sasl_regexp_rewrite_config( &sasl_rwinfo, "sasl-regexp", 0,
+ SaslRegexp[ i ].sr_match,
+ SaslRegexp[ i ].sr_replace,
+ AUTHID_CONTEXT );
+ assert( rc == 0 );
+ }
+ }
+
+ return rc;
+}
+
+void slap_sasl_regexp_unparse( BerVarray *out )
+{
+ int i;
+ BerVarray bva = NULL;
+ char ibuf[32], *ptr;
+ struct berval idx;
+
+ if ( !nSaslRegexp ) return;
+
+ idx.bv_val = ibuf;
+ bva = ch_malloc( (nSaslRegexp+1) * sizeof(struct berval) );
+ BER_BVZERO(bva+nSaslRegexp);
+ for ( i=0; i<nSaslRegexp; i++ ) {
+ idx.bv_len = sprintf( idx.bv_val, "{%d}", i);
+ bva[i].bv_len = idx.bv_len + strlen( SaslRegexp[i].sr_match ) +
+ strlen( SaslRegexp[i].sr_replace ) + 5;
+ bva[i].bv_val = ch_malloc( bva[i].bv_len+1 );
+ ptr = lutil_strcopy( bva[i].bv_val, ibuf );
+ *ptr++ = '"';
+ ptr = lutil_strcopy( ptr, SaslRegexp[i].sr_match );
+ ptr = lutil_strcopy( ptr, "\" \"" );
+ ptr = lutil_strcopy( ptr, SaslRegexp[i].sr_replace );
+ *ptr++ = '"';
+ *ptr = '\0';
+ }
+ *out = bva;
+}
+
+/* Take the passed in SASL name and attempt to convert it into an
+ LDAP URI to find the matching LDAP entry, using the pattern matching
+ strings given in the saslregexp config file directive(s) */
+
+static int slap_authz_regexp( struct berval *in, struct berval *out,
+ int flags, void *ctx )
+{
+ const char *context = AUTHID_CONTEXT;
+
+ if ( sasl_rwinfo == NULL || BER_BVISNULL( in ) ) {
+ return 0;
+ }
+
+ /* FIXME: if aware of authc/authz mapping,
+ * we could use different contexts ... */
+ switch ( rewrite_session( sasl_rwinfo, context, in->bv_val, NULL,
+ &out->bv_val ) )
+ {
+ case REWRITE_REGEXEC_OK:
+ if ( !BER_BVISNULL( out ) ) {
+ char *val = out->bv_val;
+ ber_str2bv_x( val, 0, 1, out, ctx );
+ if ( val != in->bv_val ) {
+ free( val );
+ }
+ } else {
+ ber_dupbv_x( out, in, ctx );
+ }
+ Debug( LDAP_DEBUG_ARGS,
+ "[rw] %s: \"%s\" -> \"%s\"\n",
+ context, in->bv_val, out->bv_val );
+ return 1;
+
+ case REWRITE_REGEXEC_UNWILLING:
+ case REWRITE_REGEXEC_ERR:
+ default:
+ return 0;
+ }
+
+}
+
+/* This callback actually does some work...*/
+static int sasl_sc_sasl2dn( Operation *op, SlapReply *rs )
+{
+ struct berval *ndn = op->o_callback->sc_private;
+
+ if ( rs->sr_type != REP_SEARCH ) return LDAP_SUCCESS;
+
+ /* We only want to be called once */
+ if ( !BER_BVISNULL( ndn ) ) {
+ op->o_tmpfree( ndn->bv_val, op->o_tmpmemctx );
+ BER_BVZERO( ndn );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "%s: slap_sc_sasl2dn: search DN returned more than 1 entry\n",
+ op->o_log_prefix );
+ return LDAP_UNAVAILABLE; /* short-circuit the search */
+ }
+
+ ber_dupbv_x( ndn, &rs->sr_entry->e_nname, op->o_tmpmemctx );
+ return LDAP_SUCCESS;
+}
+
+
+typedef struct smatch_info {
+ struct berval *dn;
+ int match;
+} smatch_info;
+
+static int sasl_sc_smatch( Operation *o, SlapReply *rs )
+{
+ smatch_info *sm = o->o_callback->sc_private;
+
+ if (rs->sr_type != REP_SEARCH) return 0;
+
+ if (dn_match(sm->dn, &rs->sr_entry->e_nname)) {
+ sm->match = 1;
+ return LDAP_UNAVAILABLE; /* short-circuit the search */
+ }
+
+ return 0;
+}
+
+int
+slap_sasl_matches( Operation *op, BerVarray rules,
+ struct berval *assertDN, struct berval *authc )
+{
+ int rc = LDAP_INAPPROPRIATE_AUTH;
+
+ if ( rules != NULL ) {
+ int i;
+
+ for( i = 0; !BER_BVISNULL( &rules[i] ); i++ ) {
+ rc = slap_sasl_match( op, &rules[i], assertDN, authc );
+ if ( rc == LDAP_SUCCESS ) break;
+ }
+ }
+
+ return rc;
+}
+
+/*
+ * Map a SASL regexp rule to a DN. If the rule is just a DN or a scope=base
+ * URI, just strcmp the rule (or its searchbase) to the *assertDN. Otherwise,
+ * the rule must be used as an internal search for entries. If that search
+ * returns the *assertDN entry, the match is successful.
+ *
+ * The assertDN should not have the dn: prefix
+ */
+
+static int
+slap_sasl_match( Operation *opx, struct berval *rule,
+ struct berval *assertDN, struct berval *authc )
+{
+ int rc;
+ regex_t reg;
+ smatch_info sm;
+ slap_callback cb = { NULL, sasl_sc_smatch, NULL, NULL };
+ Operation op = {0};
+ SlapReply rs = {REP_RESULT};
+ struct berval base = BER_BVNULL;
+
+ sm.dn = assertDN;
+ sm.match = 0;
+ cb.sc_private = &sm;
+
+ Debug( LDAP_DEBUG_TRACE,
+ "===>slap_sasl_match: comparing DN %s to rule %s\n",
+ assertDN->bv_len ? assertDN->bv_val : "(null)", rule->bv_val );
+
+ /* NOTE: don't normalize rule if authz syntax is enabled */
+ rc = slap_parseURI( opx, rule, &base, &op.o_req_ndn,
+ &op.ors_scope, &op.ors_filter, &op.ors_filterstr, 0 );
+
+ if( rc != LDAP_SUCCESS ) goto CONCLUDED;
+
+ switch ( op.ors_scope ) {
+ case LDAP_X_SCOPE_EXACT:
+exact_match:
+ if ( dn_match( &op.o_req_ndn, assertDN ) ) {
+ rc = LDAP_SUCCESS;
+ } else {
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ }
+ goto CONCLUDED;
+
+ case LDAP_X_SCOPE_CHILDREN:
+ case LDAP_X_SCOPE_SUBTREE:
+ case LDAP_X_SCOPE_ONELEVEL:
+ {
+ int d = assertDN->bv_len - op.o_req_ndn.bv_len;
+
+ rc = LDAP_INAPPROPRIATE_AUTH;
+
+ if ( d == 0 && op.ors_scope == LDAP_X_SCOPE_SUBTREE ) {
+ goto exact_match;
+
+ } else if ( d > 0 ) {
+ struct berval bv;
+
+ /* leave room for at least one char of attributeType,
+ * one for '=' and one for ',' */
+ if ( d < (int) STRLENOF( "x=,") ) {
+ goto CONCLUDED;
+ }
+
+ bv.bv_len = op.o_req_ndn.bv_len;
+ bv.bv_val = assertDN->bv_val + d;
+
+ if ( bv.bv_val[ -1 ] == ',' && dn_match( &op.o_req_ndn, &bv ) ) {
+ switch ( op.ors_scope ) {
+ case LDAP_X_SCOPE_SUBTREE:
+ case LDAP_X_SCOPE_CHILDREN:
+ rc = LDAP_SUCCESS;
+ break;
+
+ case LDAP_X_SCOPE_ONELEVEL:
+ {
+ struct berval pdn;
+
+ dnParent( assertDN, &pdn );
+ /* the common portion of the DN
+ * already matches, so only check
+ * if parent DN of assertedDN
+ * is all the pattern */
+ if ( pdn.bv_len == op.o_req_ndn.bv_len ) {
+ rc = LDAP_SUCCESS;
+ }
+ break;
+ }
+ default:
+ /* at present, impossible */
+ assert( 0 );
+ }
+ }
+ }
+ goto CONCLUDED;
+ }
+
+ case LDAP_X_SCOPE_REGEX:
+ rc = regcomp(&reg, op.o_req_ndn.bv_val,
+ REG_EXTENDED|REG_ICASE|REG_NOSUB);
+ if ( rc == 0 ) {
+ rc = regexec(&reg, assertDN->bv_val, 0, NULL, 0);
+ regfree( &reg );
+ }
+ if ( rc == 0 ) {
+ rc = LDAP_SUCCESS;
+ } else {
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ }
+ goto CONCLUDED;
+
+ case LDAP_X_SCOPE_GROUP: {
+ char *tmp;
+
+ /* Now filterstr looks like "(&(objectClass=<group_oc>)(<member_at>="
+ * we need to append the <assertDN> so that the <group_dn> is searched
+ * with scope "base", and the filter ensures that <assertDN> is
+ * member of the group */
+ tmp = ch_realloc( op.ors_filterstr.bv_val, op.ors_filterstr.bv_len +
+ assertDN->bv_len + STRLENOF( /*"(("*/ "))" ) + 1 );
+ if ( tmp == NULL ) {
+ rc = LDAP_NO_MEMORY;
+ goto CONCLUDED;
+ }
+ op.ors_filterstr.bv_val = tmp;
+
+ tmp = lutil_strcopy( &tmp[op.ors_filterstr.bv_len], assertDN->bv_val );
+ tmp = lutil_strcopy( tmp, /*"(("*/ "))" );
+
+ /* pass opx because str2filter_x may (and does) use o_tmpmfuncs */
+ op.ors_filter = str2filter_x( opx, op.ors_filterstr.bv_val );
+ if ( op.ors_filter == NULL ) {
+ rc = LDAP_PROTOCOL_ERROR;
+ goto CONCLUDED;
+ }
+ op.ors_scope = LDAP_SCOPE_BASE;
+
+ /* hijack match DN: use that of the group instead of the assertDN;
+ * assertDN is now in the filter */
+ sm.dn = &op.o_req_ndn;
+
+ /* do the search */
+ break;
+ }
+
+ case LDAP_X_SCOPE_USERS:
+ if ( !BER_BVISEMPTY( assertDN ) ) {
+ rc = LDAP_SUCCESS;
+ } else {
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ }
+ goto CONCLUDED;
+
+ default:
+ break;
+ }
+
+ /* Must run an internal search. */
+ if ( op.ors_filter == NULL ) {
+ rc = LDAP_FILTER_ERROR;
+ goto CONCLUDED;
+ }
+
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_sasl_match: performing internal search (base=%s, scope=%d)\n",
+ op.o_req_ndn.bv_val, op.ors_scope );
+
+ op.o_bd = select_backend( &op.o_req_ndn, 1 );
+ if(( op.o_bd == NULL ) || ( op.o_bd->be_search == NULL)) {
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ goto CONCLUDED;
+ }
+
+ op.o_hdr = opx->o_hdr;
+ op.o_tag = LDAP_REQ_SEARCH;
+ op.o_ndn = *authc;
+ op.o_callback = &cb;
+ slap_op_time( &op.o_time, &op.o_tincr );
+ op.o_do_not_cache = 1;
+ op.o_is_auth_check = 1;
+ /* use req_ndn as req_dn instead of non-pretty base of uri */
+ if( !BER_BVISNULL( &base ) ) {
+ ch_free( base.bv_val );
+ /* just in case... */
+ BER_BVZERO( &base );
+ }
+ ber_dupbv_x( &op.o_req_dn, &op.o_req_ndn, op.o_tmpmemctx );
+ op.ors_deref = LDAP_DEREF_NEVER;
+ op.ors_slimit = 1;
+ op.ors_tlimit = SLAP_NO_LIMIT;
+ op.ors_attrs = slap_anlist_no_attrs;
+ op.ors_attrsonly = 1;
+
+ op.o_bd->be_search( &op, &rs );
+
+ if (sm.match) {
+ rc = LDAP_SUCCESS;
+ } else {
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ }
+
+CONCLUDED:
+ if( !BER_BVISNULL( &op.o_req_dn ) ) slap_sl_free( op.o_req_dn.bv_val, opx->o_tmpmemctx );
+ if( !BER_BVISNULL( &op.o_req_ndn ) ) slap_sl_free( op.o_req_ndn.bv_val, opx->o_tmpmemctx );
+ if( op.ors_filter ) filter_free_x( opx, op.ors_filter, 1 );
+ if( !BER_BVISNULL( &op.ors_filterstr ) ) ch_free( op.ors_filterstr.bv_val );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "<===slap_sasl_match: comparison returned %d\n", rc );
+
+ return( rc );
+}
+
+
+/*
+ * This function answers the question, "Can this ID authorize to that ID?",
+ * based on authorization rules. The rules are stored in the *searchDN, in the
+ * attribute named by *attr. If any of those rules map to the *assertDN, the
+ * authorization is approved.
+ *
+ * The DNs should not have the dn: prefix
+ */
+static int
+slap_sasl_check_authz( Operation *op,
+ struct berval *searchDN,
+ struct berval *assertDN,
+ AttributeDescription *ad,
+ struct berval *authc )
+{
+ int rc,
+ do_not_cache = op->o_do_not_cache;
+ BerVarray vals = NULL;
+
+ Debug( LDAP_DEBUG_TRACE,
+ "==>slap_sasl_check_authz: does %s match %s rule in %s?\n",
+ assertDN->bv_val, ad->ad_cname.bv_val, searchDN->bv_val);
+
+ /* ITS#4760: don't cache group access */
+ op->o_do_not_cache = 1;
+ rc = backend_attribute( op, NULL, searchDN, ad, &vals, ACL_AUTH );
+ op->o_do_not_cache = do_not_cache;
+ if( rc != LDAP_SUCCESS ) goto COMPLETE;
+
+ /* Check if the *assertDN matches any *vals */
+ rc = slap_sasl_matches( op, vals, assertDN, authc );
+
+COMPLETE:
+ if( vals ) ber_bvarray_free_x( vals, op->o_tmpmemctx );
+
+ Debug( LDAP_DEBUG_TRACE,
+ "<==slap_sasl_check_authz: %s check returning %d\n",
+ ad->ad_cname.bv_val, rc );
+
+ return( rc );
+}
+
+/*
+ * Given a SASL name (e.g. "UID=name,cn=REALM,cn=MECH,cn=AUTH")
+ * return the LDAP DN to which it matches. The SASL regexp rules in the config
+ * file turn the SASL name into an LDAP URI. If the URI is just a DN (or a
+ * search with scope=base), just return the URI (or its searchbase). Otherwise
+ * an internal search must be done, and if that search returns exactly one
+ * entry, return the DN of that one entry.
+ */
+void
+slap_sasl2dn(
+ Operation *opx,
+ struct berval *saslname,
+ struct berval *sasldn,
+ int flags )
+{
+ int rc;
+ slap_callback cb = { NULL, sasl_sc_sasl2dn, NULL, NULL };
+ Operation op = {0};
+ SlapReply rs = {REP_RESULT};
+ struct berval regout = BER_BVNULL;
+ struct berval base = BER_BVNULL;
+
+ Debug( LDAP_DEBUG_TRACE, "==>slap_sasl2dn: "
+ "converting SASL name %s to a DN\n",
+ saslname->bv_val );
+
+ BER_BVZERO( sasldn );
+ cb.sc_private = sasldn;
+
+ /* Convert the SASL name into a minimal URI */
+ if( !slap_authz_regexp( saslname, &regout, flags, opx->o_tmpmemctx ) ) {
+ goto FINISHED;
+ }
+
+ /* NOTE: always normalize regout because it results
+ * from string submatch expansion */
+ rc = slap_parseURI( opx, &regout, &base, &op.o_req_ndn,
+ &op.ors_scope, &op.ors_filter, &op.ors_filterstr, 1 );
+ if ( !BER_BVISNULL( &regout ) ) slap_sl_free( regout.bv_val, opx->o_tmpmemctx );
+ if ( rc != LDAP_SUCCESS ) {
+ goto FINISHED;
+ }
+
+ /* Must do an internal search */
+ op.o_bd = select_backend( &op.o_req_ndn, 1 );
+
+ switch ( op.ors_scope ) {
+ case LDAP_X_SCOPE_EXACT:
+ *sasldn = op.o_req_ndn;
+ BER_BVZERO( &op.o_req_ndn );
+ /* intentionally continue to next case */
+
+ case LDAP_X_SCOPE_REGEX:
+ case LDAP_X_SCOPE_SUBTREE:
+ case LDAP_X_SCOPE_CHILDREN:
+ case LDAP_X_SCOPE_ONELEVEL:
+ case LDAP_X_SCOPE_GROUP:
+ case LDAP_X_SCOPE_USERS:
+ /* correctly parsed, but illegal */
+ goto FINISHED;
+
+ case LDAP_SCOPE_BASE:
+ case LDAP_SCOPE_ONELEVEL:
+ case LDAP_SCOPE_SUBTREE:
+ case LDAP_SCOPE_SUBORDINATE:
+ /* do a search */
+ break;
+
+ default:
+ /* catch unhandled cases (there shouldn't be) */
+ assert( 0 );
+ }
+
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_sasl2dn: performing internal search (base=%s, scope=%d)\n",
+ op.o_req_ndn.bv_val, op.ors_scope );
+
+ if ( ( op.o_bd == NULL ) || ( op.o_bd->be_search == NULL) ) {
+ goto FINISHED;
+ }
+
+ /* Must run an internal search. */
+ if ( op.ors_filter == NULL ) {
+ rc = LDAP_FILTER_ERROR;
+ goto FINISHED;
+ }
+
+ op.o_hdr = opx->o_hdr;
+ op.o_tag = LDAP_REQ_SEARCH;
+ op.o_ndn = opx->o_conn->c_ndn;
+ op.o_callback = &cb;
+ slap_op_time( &op.o_time, &op.o_tincr );
+ op.o_do_not_cache = 1;
+ op.o_is_auth_check = 1;
+ op.ors_deref = LDAP_DEREF_NEVER;
+ op.ors_slimit = 1;
+ op.ors_tlimit = SLAP_NO_LIMIT;
+ op.ors_attrs = slap_anlist_no_attrs;
+ op.ors_attrsonly = 1;
+ /* use req_ndn as req_dn instead of non-pretty base of uri */
+ if( !BER_BVISNULL( &base ) ) {
+ ch_free( base.bv_val );
+ /* just in case... */
+ BER_BVZERO( &base );
+ }
+ ber_dupbv_x( &op.o_req_dn, &op.o_req_ndn, op.o_tmpmemctx );
+
+ op.o_bd->be_search( &op, &rs );
+
+FINISHED:
+ if( opx == opx->o_conn->c_sasl_bindop && !BER_BVISEMPTY( sasldn ) ) {
+ opx->o_conn->c_authz_backend = op.o_bd;
+ }
+ if( !BER_BVISNULL( &op.o_req_dn ) ) {
+ slap_sl_free( op.o_req_dn.bv_val, opx->o_tmpmemctx );
+ }
+ if( !BER_BVISNULL( &op.o_req_ndn ) ) {
+ slap_sl_free( op.o_req_ndn.bv_val, opx->o_tmpmemctx );
+ }
+ if( op.ors_filter ) {
+ filter_free_x( opx, op.ors_filter, 1 );
+ }
+ if( !BER_BVISNULL( &op.ors_filterstr ) ) {
+ ch_free( op.ors_filterstr.bv_val );
+ }
+
+ Debug( LDAP_DEBUG_TRACE, "<==slap_sasl2dn: Converted SASL name to %s\n",
+ !BER_BVISEMPTY( sasldn ) ? sasldn->bv_val : "<nothing>" );
+
+ return;
+}
+
+
+/* Check if a bind can SASL authorize to another identity.
+ * The DNs should not have the dn: prefix
+ */
+
+int slap_sasl_authorized( Operation *op,
+ struct berval *authcDN, struct berval *authzDN )
+{
+ int rc = LDAP_INAPPROPRIATE_AUTH;
+
+ /* User binding as anonymous */
+ if ( !authzDN || !authzDN->bv_len || !authzDN->bv_val ) {
+ rc = LDAP_SUCCESS;
+ goto DONE;
+ }
+
+ /* User is anonymous */
+ if ( !authcDN || !authcDN->bv_len || !authcDN->bv_val ) {
+ goto DONE;
+ }
+
+ Debug( LDAP_DEBUG_TRACE,
+ "==>slap_sasl_authorized: can %s become %s?\n",
+ authcDN->bv_len ? authcDN->bv_val : "(null)",
+ authzDN->bv_len ? authzDN->bv_val : "(null)" );
+
+ /* If person is authorizing to self, succeed */
+ if ( dn_match( authcDN, authzDN ) ) {
+ rc = LDAP_SUCCESS;
+ goto DONE;
+ }
+
+ /* Allow the manager to authorize as any DN in its own DBs. */
+ {
+ Backend *zbe = select_backend( authzDN, 1 );
+ if ( zbe && be_isroot_dn( zbe, authcDN )) {
+ rc = LDAP_SUCCESS;
+ goto DONE;
+ }
+ }
+
+ /* Check source rules */
+ if( authz_policy & SASL_AUTHZ_TO ) {
+ rc = slap_sasl_check_authz( op, authcDN, authzDN,
+ slap_schema.si_ad_saslAuthzTo, authcDN );
+ if(( rc == LDAP_SUCCESS ) ^ (( authz_policy & SASL_AUTHZ_AND) != 0)) {
+ if( rc != LDAP_SUCCESS )
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ goto DONE;
+ }
+ }
+
+ /* Check destination rules */
+ if( authz_policy & SASL_AUTHZ_FROM ) {
+ rc = slap_sasl_check_authz( op, authzDN, authcDN,
+ slap_schema.si_ad_saslAuthzFrom, authcDN );
+ if( rc == LDAP_SUCCESS ) {
+ goto DONE;
+ }
+ }
+
+ rc = LDAP_INAPPROPRIATE_AUTH;
+
+DONE:
+
+ Debug( LDAP_DEBUG_TRACE,
+ "<== slap_sasl_authorized: return %d\n", rc );
+
+ return( rc );
+}