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-rw-r--r--servers/slapd/sasl.c1906
1 files changed, 1906 insertions, 0 deletions
diff --git a/servers/slapd/sasl.c b/servers/slapd/sasl.c
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--- /dev/null
+++ b/servers/slapd/sasl.c
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+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * 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 <lber.h>
+#include <ldap_log.h>
+
+#include "slap.h"
+
+#ifdef ENABLE_REWRITE
+#include <rewrite.h>
+#endif
+
+#ifdef HAVE_CYRUS_SASL
+# ifdef HAVE_SASL_SASL_H
+# include <sasl/sasl.h>
+# include <sasl/saslplug.h>
+# else
+# include <sasl.h>
+# include <saslplug.h>
+# endif
+
+# define SASL_CONST const
+
+#define SASL_VERSION_FULL ((SASL_VERSION_MAJOR << 16) |\
+ (SASL_VERSION_MINOR << 8) | SASL_VERSION_STEP)
+
+#if SASL_VERSION_FULL >= 0x020119 /* 2.1.25 */
+typedef sasl_callback_ft slap_sasl_cb_ft;
+#else
+typedef int (*slap_sasl_cb_ft)();
+#endif
+
+static sasl_security_properties_t sasl_secprops;
+#elif defined( SLAP_BUILTIN_SASL )
+/*
+ * built-in SASL implementation
+ * only supports EXTERNAL
+ */
+typedef struct sasl_ctx {
+ slap_ssf_t sc_external_ssf;
+ struct berval sc_external_id;
+} SASL_CTX;
+
+#endif
+
+#include <lutil.h>
+
+static struct berval ext_bv = BER_BVC( "EXTERNAL" );
+
+char *slap_sasl_auxprops;
+
+#ifdef HAVE_CYRUS_SASL
+
+/* Just use our internal auxprop by default */
+static int
+slap_sasl_getopt(
+ void *context,
+ const char *plugin_name,
+ const char *option,
+ const char **result,
+ unsigned *len)
+{
+ if ( strcmp( option, "auxprop_plugin" )) {
+ return SASL_FAIL;
+ }
+ if ( slap_sasl_auxprops )
+ *result = slap_sasl_auxprops;
+ else
+ *result = "slapd";
+ return SASL_OK;
+}
+
+int
+slap_sasl_log(
+ void *context,
+ int priority,
+ const char *message)
+{
+ Connection *conn = context;
+ int level;
+ const char * label;
+
+ if ( message == NULL ) {
+ return SASL_BADPARAM;
+ }
+
+ switch (priority) {
+ case SASL_LOG_NONE:
+ level = LDAP_DEBUG_NONE;
+ label = "None";
+ break;
+ case SASL_LOG_ERR:
+ level = LDAP_DEBUG_ANY;
+ label = "Error";
+ break;
+ case SASL_LOG_FAIL:
+ level = LDAP_DEBUG_ANY;
+ label = "Failure";
+ break;
+ case SASL_LOG_WARN:
+ level = LDAP_DEBUG_TRACE;
+ label = "Warning";
+ break;
+ case SASL_LOG_NOTE:
+ level = LDAP_DEBUG_TRACE;
+ label = "Notice";
+ break;
+ case SASL_LOG_DEBUG:
+ level = LDAP_DEBUG_TRACE;
+ label = "Debug";
+ break;
+ case SASL_LOG_TRACE:
+ level = LDAP_DEBUG_TRACE;
+ label = "Trace";
+ break;
+ case SASL_LOG_PASS:
+ level = LDAP_DEBUG_TRACE;
+ label = "Password Trace";
+ break;
+ default:
+ return SASL_BADPARAM;
+ }
+
+ Debug( level, "SASL [conn=%ld] %s: %s\n",
+ conn ? (long) conn->c_connid: -1L,
+ label, message );
+
+
+ return SASL_OK;
+}
+
+static const char *slap_propnames[] = {
+ "*slapConn", "*slapAuthcDNlen", "*slapAuthcDN",
+ "*slapAuthzDNlen", "*slapAuthzDN", NULL };
+
+static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
+static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
+
+#define SLAP_SASL_PROP_CONN 0
+#define SLAP_SASL_PROP_AUTHCLEN 1
+#define SLAP_SASL_PROP_AUTHC 2
+#define SLAP_SASL_PROP_AUTHZLEN 3
+#define SLAP_SASL_PROP_AUTHZ 4
+#define SLAP_SASL_PROP_COUNT 5 /* Number of properties we used */
+
+typedef struct lookup_info {
+ int flags;
+ const struct propval *list;
+ sasl_server_params_t *sparams;
+} lookup_info;
+
+static slap_response sasl_ap_lookup;
+
+static struct berval sc_cleartext = BER_BVC("{CLEARTEXT}");
+
+static int
+sasl_ap_lookup( Operation *op, SlapReply *rs )
+{
+ BerVarray bv;
+ AttributeDescription *ad;
+ Attribute *a;
+ const char *text;
+ int rc, i;
+ lookup_info *sl = (lookup_info *)op->o_callback->sc_private;
+
+ if (rs->sr_type != REP_SEARCH) return 0;
+
+ for( i = 0; sl->list[i].name; i++ ) {
+ const char *name = sl->list[i].name;
+
+ if ( name[0] == '*' ) {
+ if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
+ /* Skip our private properties */
+ if ( !strcmp( name, slap_propnames[0] )) {
+ i += SLAP_SASL_PROP_COUNT - 1;
+ continue;
+ }
+ name++;
+ } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
+ continue;
+
+ if ( sl->list[i].values ) {
+ if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
+ }
+ ad = NULL;
+ rc = slap_str2ad( name, &ad, &text );
+ if ( rc != LDAP_SUCCESS ) {
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_ap_lookup: str2ad(%s): %s\n", name, text, 0 );
+ continue;
+ }
+
+ /* If it's the rootdn and a rootpw was present, we already set
+ * it so don't override it here.
+ */
+ if ( ad == slap_schema.si_ad_userPassword && sl->list[i].values &&
+ be_isroot_dn( op->o_bd, &op->o_req_ndn ))
+ continue;
+
+ a = attr_find( rs->sr_entry->e_attrs, ad );
+ if ( !a ) continue;
+ if ( ! access_allowed( op, rs->sr_entry, ad, NULL, ACL_AUTH, NULL ) ) {
+ continue;
+ }
+ if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) ) {
+ sl->sparams->utils->prop_erase( sl->sparams->propctx,
+ sl->list[i].name );
+ }
+ for ( bv = a->a_vals; bv->bv_val; bv++ ) {
+ /* ITS#3846 don't give hashed passwords to SASL */
+ if ( ad == slap_schema.si_ad_userPassword &&
+ bv->bv_val[0] == '{' /*}*/ )
+ {
+ if ( lutil_passwd_scheme( bv->bv_val ) ) {
+ /* If it's not a recognized scheme, just assume it's
+ * a cleartext password that happened to include brackets.
+ *
+ * If it's a recognized scheme, skip this value, unless the
+ * scheme is {CLEARTEXT}. In that case, skip over the
+ * scheme name and use the remainder. If there is nothing
+ * past the scheme name, skip this value.
+ */
+#ifdef SLAPD_CLEARTEXT
+ if ( !strncasecmp( bv->bv_val, sc_cleartext.bv_val,
+ sc_cleartext.bv_len )) {
+ struct berval cbv;
+ cbv.bv_len = bv->bv_len - sc_cleartext.bv_len;
+ if ( cbv.bv_len > 0 ) {
+ cbv.bv_val = bv->bv_val + sc_cleartext.bv_len;
+ sl->sparams->utils->prop_set( sl->sparams->propctx,
+ sl->list[i].name, cbv.bv_val, cbv.bv_len );
+ }
+ }
+#endif
+ continue;
+ }
+ }
+ sl->sparams->utils->prop_set( sl->sparams->propctx,
+ sl->list[i].name, bv->bv_val, bv->bv_len );
+ }
+ }
+ return LDAP_SUCCESS;
+}
+
+#if SASL_VERSION_FULL >= 0x020118
+static int
+#else
+static void
+#endif
+slap_auxprop_lookup(
+ void *glob_context,
+ sasl_server_params_t *sparams,
+ unsigned flags,
+ const char *user,
+ unsigned ulen)
+{
+ OperationBuffer opbuf = {{ NULL }};
+ Operation *op = (Operation *)&opbuf;
+ int i, doit = 0;
+ Connection *conn = NULL;
+ lookup_info sl;
+ int rc = LDAP_SUCCESS;
+
+ sl.list = sparams->utils->prop_get( sparams->propctx );
+ sl.sparams = sparams;
+ sl.flags = flags;
+
+ /* Find our DN and conn first */
+ for( i = 0; sl.list[i].name; i++ ) {
+ if ( sl.list[i].name[0] == '*' ) {
+ if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
+ if ( sl.list[i].values && sl.list[i].values[0] )
+ AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
+ continue;
+ }
+ if ( flags & SASL_AUXPROP_AUTHZID ) {
+ if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZLEN] )) {
+ if ( sl.list[i].values && sl.list[i].values[0] )
+ AC_MEMCPY( &op->o_req_ndn.bv_len, sl.list[i].values[0],
+ sizeof( op->o_req_ndn.bv_len ) );
+ } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZ] )) {
+ if ( sl.list[i].values )
+ op->o_req_ndn.bv_val = (char *)sl.list[i].values[0];
+ break;
+ }
+ }
+
+ if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
+ if ( sl.list[i].values && sl.list[i].values[0] )
+ AC_MEMCPY( &op->o_req_ndn.bv_len, sl.list[i].values[0],
+ sizeof( op->o_req_ndn.bv_len ) );
+ } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
+ if ( sl.list[i].values ) {
+ op->o_req_ndn.bv_val = (char *)sl.list[i].values[0];
+ if ( !(flags & SASL_AUXPROP_AUTHZID) )
+ break;
+ }
+ }
+ }
+ }
+
+ /* we don't know anything about this, ignore it */
+ if ( !conn ) {
+ rc = LDAP_SUCCESS;
+ goto done;
+ }
+
+ /* Now see what else needs to be fetched */
+ for( i = 0; sl.list[i].name; i++ ) {
+ const char *name = sl.list[i].name;
+
+ if ( name[0] == '*' ) {
+ if ( flags & SASL_AUXPROP_AUTHZID ) continue;
+ /* Skip our private properties */
+ if ( !strcmp( name, slap_propnames[0] )) {
+ i += SLAP_SASL_PROP_COUNT - 1;
+ continue;
+ }
+ name++;
+ } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
+ continue;
+
+ if ( sl.list[i].values ) {
+ if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
+ }
+ doit = 1;
+ break;
+ }
+
+ if (doit) {
+ slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
+
+ cb.sc_private = &sl;
+
+ op->o_bd = select_backend( &op->o_req_ndn, 1 );
+
+ if ( op->o_bd ) {
+ /* For rootdn, see if we can use the rootpw */
+ if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) &&
+ !BER_BVISEMPTY( &op->o_bd->be_rootpw )) {
+ struct berval cbv = BER_BVNULL;
+
+ /* If there's a recognized scheme, see if it's CLEARTEXT */
+ if ( lutil_passwd_scheme( op->o_bd->be_rootpw.bv_val )) {
+ if ( !strncasecmp( op->o_bd->be_rootpw.bv_val,
+ sc_cleartext.bv_val, sc_cleartext.bv_len )) {
+
+ /* If it's CLEARTEXT, skip past scheme spec */
+ cbv.bv_len = op->o_bd->be_rootpw.bv_len -
+ sc_cleartext.bv_len;
+ if ( cbv.bv_len ) {
+ cbv.bv_val = op->o_bd->be_rootpw.bv_val +
+ sc_cleartext.bv_len;
+ }
+ }
+ /* No scheme, use the whole value */
+ } else {
+ cbv = op->o_bd->be_rootpw;
+ }
+ if ( !BER_BVISEMPTY( &cbv )) {
+ for( i = 0; sl.list[i].name; i++ ) {
+ const char *name = sl.list[i].name;
+
+ if ( name[0] == '*' ) {
+ if ( flags & SASL_AUXPROP_AUTHZID ) continue;
+ name++;
+ } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
+ continue;
+
+ if ( !strcasecmp(name,"userPassword") ) {
+ sl.sparams->utils->prop_set( sl.sparams->propctx,
+ sl.list[i].name, cbv.bv_val, cbv.bv_len );
+ break;
+ }
+ }
+ }
+ }
+
+ if ( op->o_bd->be_search ) {
+ SlapReply rs = {REP_RESULT};
+ op->o_hdr = conn->c_sasl_bindop->o_hdr;
+ op->o_controls = opbuf.ob_controls;
+ op->o_tag = LDAP_REQ_SEARCH;
+ op->o_dn = conn->c_ndn;
+ op->o_ndn = 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->o_req_dn = op->o_req_ndn;
+ op->ors_scope = LDAP_SCOPE_BASE;
+ op->ors_deref = LDAP_DEREF_NEVER;
+ op->ors_tlimit = SLAP_NO_LIMIT;
+ op->ors_slimit = 1;
+ op->ors_filter = &generic_filter;
+ op->ors_filterstr = generic_filterstr;
+ op->o_authz = conn->c_authz;
+ /* FIXME: we want all attributes, right? */
+ op->ors_attrs = NULL;
+
+ rc = op->o_bd->be_search( op, &rs );
+ }
+ }
+ }
+done:;
+#if SASL_VERSION_FULL >= 0x020118
+ return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
+#endif
+}
+
+#if SASL_VERSION_FULL >= 0x020110
+static int
+slap_auxprop_store(
+ void *glob_context,
+ sasl_server_params_t *sparams,
+ struct propctx *prctx,
+ const char *user,
+ unsigned ulen)
+{
+ Operation op = {0};
+ Opheader oph;
+ SlapReply rs = {REP_RESULT};
+ int rc, i;
+ unsigned j;
+ Connection *conn = NULL;
+ const struct propval *pr;
+ Modifications *modlist = NULL, **modtail = &modlist, *mod;
+ slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
+ char textbuf[SLAP_TEXT_BUFLEN];
+ const char *text;
+ size_t textlen = sizeof(textbuf);
+
+ /* just checking if we are enabled */
+ if (!prctx) return SASL_OK;
+
+ if (!sparams || !user) return SASL_BADPARAM;
+
+ pr = sparams->utils->prop_get( sparams->propctx );
+
+ /* Find our DN and conn first */
+ for( i = 0; pr[i].name; i++ ) {
+ if ( pr[i].name[0] == '*' ) {
+ if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
+ if ( pr[i].values && pr[i].values[0] )
+ AC_MEMCPY( &conn, pr[i].values[0], sizeof( conn ) );
+ continue;
+ }
+ if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
+ if ( pr[i].values && pr[i].values[0] )
+ AC_MEMCPY( &op.o_req_ndn.bv_len, pr[i].values[0],
+ sizeof( op.o_req_ndn.bv_len ) );
+ } else if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
+ if ( pr[i].values )
+ op.o_req_ndn.bv_val = (char *)pr[i].values[0];
+ }
+ }
+ }
+ if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
+
+ op.o_bd = select_backend( &op.o_req_ndn, 1 );
+
+ if ( !op.o_bd || !op.o_bd->be_modify ) return SASL_FAIL;
+
+ pr = sparams->utils->prop_get( prctx );
+ if (!pr) return SASL_BADPARAM;
+
+ for (i=0; pr[i].name; i++);
+ if (!i) return SASL_BADPARAM;
+
+ for (i=0; pr[i].name; i++) {
+ mod = (Modifications *)ch_malloc( sizeof(Modifications) );
+ mod->sml_op = LDAP_MOD_REPLACE;
+ mod->sml_flags = 0;
+ ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
+ mod->sml_numvals = pr[i].nvalues;
+ mod->sml_values = (struct berval *)ch_malloc( (pr[i].nvalues + 1) *
+ sizeof(struct berval));
+ for (j=0; j<pr[i].nvalues; j++) {
+ ber_str2bv( pr[i].values[j], 0, 1, &mod->sml_values[j]);
+ }
+ BER_BVZERO( &mod->sml_values[j] );
+ mod->sml_nvalues = NULL;
+ mod->sml_desc = NULL;
+ *modtail = mod;
+ modtail = &mod->sml_next;
+ }
+ *modtail = NULL;
+
+ rc = slap_mods_check( &op, modlist, &text, textbuf, textlen, NULL );
+
+ if ( rc == LDAP_SUCCESS ) {
+ rc = slap_mods_no_user_mod_check( &op, modlist,
+ &text, textbuf, textlen );
+
+ if ( rc == LDAP_SUCCESS ) {
+ if ( conn->c_sasl_bindop ) {
+ op.o_hdr = conn->c_sasl_bindop->o_hdr;
+ } else {
+ op.o_hdr = &oph;
+ memset( &oph, 0, sizeof(oph) );
+ operation_fake_init( conn, &op, ldap_pvt_thread_pool_context(), 0 );
+ }
+ op.o_tag = LDAP_REQ_MODIFY;
+ op.o_ndn = op.o_req_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.o_req_dn = op.o_req_ndn;
+ op.orm_modlist = modlist;
+
+ rc = op.o_bd->be_modify( &op, &rs );
+ }
+ }
+ slap_mods_free( modlist, 1 );
+ return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
+}
+#endif /* SASL_VERSION_FULL >= 2.1.16 */
+
+static sasl_auxprop_plug_t slap_auxprop_plugin = {
+ 0, /* Features */
+ 0, /* spare */
+ NULL, /* glob_context */
+ NULL, /* auxprop_free */
+ slap_auxprop_lookup,
+ "slapd", /* name */
+#if SASL_VERSION_FULL >= 0x020110
+ slap_auxprop_store /* the declaration of this member changed
+ * in cyrus SASL from 2.1.15 to 2.1.16 */
+#else
+ NULL
+#endif
+};
+
+static int
+slap_auxprop_init(
+ const sasl_utils_t *utils,
+ int max_version,
+ int *out_version,
+ sasl_auxprop_plug_t **plug,
+ const char *plugname)
+{
+ if ( !out_version || !plug ) return SASL_BADPARAM;
+
+ if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
+
+ *out_version = SASL_AUXPROP_PLUG_VERSION;
+ *plug = &slap_auxprop_plugin;
+ return SASL_OK;
+}
+
+/* Convert a SASL authcid or authzid into a DN. Store the DN in an
+ * auxiliary property, so that we can refer to it in sasl_authorize
+ * without interfering with anything else. Also, the SASL username
+ * buffer is constrained to 256 characters, and our DNs could be
+ * much longer (SLAP_LDAPDN_MAXLEN, currently set to 8192)
+ */
+static int
+slap_sasl_canonicalize(
+ sasl_conn_t *sconn,
+ void *context,
+ const char *in,
+ unsigned inlen,
+ unsigned flags,
+ const char *user_realm,
+ char *out,
+ unsigned out_max,
+ unsigned *out_len)
+{
+ Connection *conn = (Connection *)context;
+ struct propctx *props = sasl_auxprop_getctx( sconn );
+ struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
+ struct berval dn;
+ int rc, which;
+ const char *names[2];
+ struct berval bvin;
+
+ *out_len = 0;
+
+ Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
+ conn ? (long) conn->c_connid : -1L,
+ (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
+ in ? in : "<empty>");
+
+ /* If name is too big, just truncate. We don't care, we're
+ * using DNs, not the usernames.
+ */
+ if ( inlen > out_max )
+ inlen = out_max-1;
+
+ /* This is a Simple Bind using SPASSWD. That means the in-directory
+ * userPassword of the Binding user already points at SASL, so it
+ * cannot be used to actually satisfy a password comparison. Just
+ * ignore it, some other mech will process it.
+ */
+ if ( !conn->c_sasl_bindop ||
+ conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) goto done;
+
+ /* See if we need to add request, can only do it once */
+ prop_getnames( props, slap_propnames, auxvals );
+ if ( !auxvals[0].name )
+ prop_request( props, slap_propnames );
+
+ if ( flags & SASL_CU_AUTHID )
+ which = SLAP_SASL_PROP_AUTHCLEN;
+ else
+ which = SLAP_SASL_PROP_AUTHZLEN;
+
+ /* Need to store the Connection for auxprop_lookup */
+ if ( !auxvals[SLAP_SASL_PROP_CONN].values ) {
+ names[0] = slap_propnames[SLAP_SASL_PROP_CONN];
+ names[1] = NULL;
+ prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
+ }
+
+ /* Already been here? */
+ if ( auxvals[which].values )
+ goto done;
+
+ /* Normally we require an authzID to have a u: or dn: prefix.
+ * However, SASL frequently gives us an authzID that is just
+ * an exact copy of the authcID, without a prefix. We need to
+ * detect and allow this condition. If SASL calls canonicalize
+ * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
+ * But if it's broken into two calls, we need to remember the
+ * authcID so that we can compare the authzID later. We store
+ * the authcID temporarily in conn->c_sasl_dn. We necessarily
+ * finish Canonicalizing before Authorizing, so there is no
+ * conflict with slap_sasl_authorize's use of this temp var.
+ *
+ * The SASL EXTERNAL mech is backwards from all the other mechs,
+ * it does authzID before the authcID. If we see that authzID
+ * has already been done, don't do anything special with authcID.
+ */
+ if ( flags == SASL_CU_AUTHID && !auxvals[SLAP_SASL_PROP_AUTHZ].values ) {
+ conn->c_sasl_dn.bv_val = (char *) in;
+ conn->c_sasl_dn.bv_len = 0;
+ } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
+ rc = strcmp( in, conn->c_sasl_dn.bv_val );
+ conn->c_sasl_dn.bv_val = NULL;
+ /* They were equal, no work needed */
+ if ( !rc ) goto done;
+ }
+
+ bvin.bv_val = (char *)in;
+ bvin.bv_len = inlen;
+ rc = slap_sasl_getdn( conn, NULL, &bvin, (char *)user_realm, &dn,
+ (flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
+ if ( rc != LDAP_SUCCESS ) {
+ sasl_seterror( sconn, 0, ldap_err2string( rc ) );
+ return SASL_NOAUTHZ;
+ }
+
+ names[0] = slap_propnames[which];
+ names[1] = NULL;
+ prop_set( props, names[0], (char *)&dn.bv_len, sizeof( dn.bv_len ) );
+
+ which++;
+ names[0] = slap_propnames[which];
+ prop_set( props, names[0], dn.bv_val, dn.bv_len );
+
+ Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
+ conn ? (long) conn->c_connid : -1L, names[0]+1,
+ dn.bv_val ? dn.bv_val : "<EMPTY>" );
+
+ /* Not needed any more, SASL has copied it */
+ if ( conn && conn->c_sasl_bindop )
+ conn->c_sasl_bindop->o_tmpfree( dn.bv_val, conn->c_sasl_bindop->o_tmpmemctx );
+
+done:
+ AC_MEMCPY( out, in, inlen );
+ out[inlen] = '\0';
+
+ *out_len = inlen;
+
+ return SASL_OK;
+}
+
+static int
+slap_sasl_authorize(
+ sasl_conn_t *sconn,
+ void *context,
+ char *requested_user,
+ unsigned rlen,
+ char *auth_identity,
+ unsigned alen,
+ const char *def_realm,
+ unsigned urlen,
+ struct propctx *props)
+{
+ Connection *conn = (Connection *)context;
+ /* actually:
+ * (SLAP_SASL_PROP_COUNT - 1) because we skip "conn",
+ * + 1 for NULL termination?
+ */
+ struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
+ struct berval authcDN, authzDN = BER_BVNULL;
+ int rc;
+
+ /* Simple Binds don't support proxy authorization, ignore it */
+ if ( !conn->c_sasl_bindop ||
+ conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) return SASL_OK;
+
+ Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
+ "authcid=\"%s\" authzid=\"%s\"\n",
+ conn ? (long) conn->c_connid : -1L, auth_identity, requested_user );
+ if ( conn->c_sasl_dn.bv_val ) {
+ BER_BVZERO( &conn->c_sasl_dn );
+ }
+
+ /* Skip SLAP_SASL_PROP_CONN */
+ prop_getnames( props, slap_propnames+1, auxvals );
+
+ /* Should not happen */
+ if ( !auxvals[0].values ) {
+ sasl_seterror( sconn, 0, "invalid authcid" );
+ return SASL_NOAUTHZ;
+ }
+
+ AC_MEMCPY( &authcDN.bv_len, auxvals[0].values[0], sizeof(authcDN.bv_len) );
+ authcDN.bv_val = auxvals[1].values ? (char *)auxvals[1].values[0] : NULL;
+ conn->c_sasl_dn = authcDN;
+
+ /* Nothing to do if no authzID was given */
+ if ( !auxvals[2].name || !auxvals[2].values ) {
+ goto ok;
+ }
+
+ AC_MEMCPY( &authzDN.bv_len, auxvals[2].values[0], sizeof(authzDN.bv_len) );
+ authzDN.bv_val = auxvals[3].values ? (char *)auxvals[3].values[0] : NULL;
+
+ rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
+ if ( rc != LDAP_SUCCESS ) {
+ Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
+ "proxy authorization disallowed (%d)\n",
+ conn ? (long) conn->c_connid : -1L, rc, 0 );
+
+ sasl_seterror( sconn, 0, "not authorized" );
+ return SASL_NOAUTHZ;
+ }
+
+ /* FIXME: we need yet another dup because slap_sasl_getdn()
+ * is using the bind operation slab */
+ ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
+
+ok:
+ if (conn->c_sasl_bindop) {
+ Statslog( LDAP_DEBUG_STATS,
+ "%s BIND authcid=\"%s\" authzid=\"%s\"\n",
+ conn->c_sasl_bindop->o_log_prefix,
+ auth_identity, requested_user, 0, 0 );
+ }
+
+ Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
+ " proxy authorization allowed authzDN=\"%s\"\n",
+ conn ? (long) conn->c_connid : -1L,
+ authzDN.bv_val ? authzDN.bv_val : "", 0 );
+ return SASL_OK;
+}
+
+static int
+slap_sasl_err2ldap( int saslerr )
+{
+ int rc;
+
+ /* map SASL errors to LDAP resultCode returned by:
+ * sasl_server_new()
+ * SASL_OK, SASL_NOMEM
+ * sasl_server_step()
+ * SASL_OK, SASL_CONTINUE, SASL_TRANS, SASL_BADPARAM, SASL_BADPROT,
+ * ...
+ * sasl_server_start()
+ * + SASL_NOMECH
+ * sasl_setprop()
+ * SASL_OK, SASL_BADPARAM
+ */
+
+ switch (saslerr) {
+ case SASL_OK:
+ rc = LDAP_SUCCESS;
+ break;
+ case SASL_CONTINUE:
+ rc = LDAP_SASL_BIND_IN_PROGRESS;
+ break;
+ case SASL_FAIL:
+ case SASL_NOMEM:
+ rc = LDAP_OTHER;
+ break;
+ case SASL_NOMECH:
+ rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ break;
+ case SASL_BADAUTH:
+ case SASL_NOUSER:
+ case SASL_TRANS:
+ case SASL_EXPIRED:
+ rc = LDAP_INVALID_CREDENTIALS;
+ break;
+ case SASL_NOAUTHZ:
+ rc = LDAP_INSUFFICIENT_ACCESS;
+ break;
+ case SASL_TOOWEAK:
+ case SASL_ENCRYPT:
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ break;
+ case SASL_UNAVAIL:
+ case SASL_TRYAGAIN:
+ rc = LDAP_UNAVAILABLE;
+ break;
+ case SASL_DISABLED:
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ break;
+ default:
+ rc = LDAP_OTHER;
+ break;
+ }
+
+ return rc;
+}
+
+#ifdef SLAPD_SPASSWD
+
+static struct berval sasl_pwscheme = BER_BVC("{SASL}");
+
+static int chk_sasl(
+ const struct berval *sc,
+ const struct berval * passwd,
+ const struct berval * cred,
+ const char **text )
+{
+ unsigned int i;
+ int rtn;
+ void *ctx, *sconn = NULL;
+
+ for( i=0; i<cred->bv_len; i++) {
+ if(cred->bv_val[i] == '\0') {
+ return LUTIL_PASSWD_ERR; /* NUL character in password */
+ }
+ }
+
+ if( cred->bv_val[i] != '\0' ) {
+ return LUTIL_PASSWD_ERR; /* cred must behave like a string */
+ }
+
+ for( i=0; i<passwd->bv_len; i++) {
+ if(passwd->bv_val[i] == '\0') {
+ return LUTIL_PASSWD_ERR; /* NUL character in password */
+ }
+ }
+
+ if( passwd->bv_val[i] != '\0' ) {
+ return LUTIL_PASSWD_ERR; /* passwd must behave like a string */
+ }
+
+ rtn = LUTIL_PASSWD_ERR;
+
+ ctx = ldap_pvt_thread_pool_context();
+ ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sasl_bind, &sconn, NULL );
+
+ if( sconn != NULL ) {
+ int sc;
+ sc = sasl_checkpass( sconn,
+ passwd->bv_val, passwd->bv_len,
+ cred->bv_val, cred->bv_len );
+ rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
+ }
+
+ return rtn;
+}
+#endif /* SLAPD_SPASSWD */
+
+#endif /* HAVE_CYRUS_SASL */
+
+#ifdef ENABLE_REWRITE
+
+typedef struct slapd_map_data {
+ struct berval base;
+ struct berval filter;
+ AttributeName attrs[2];
+ int scope;
+} slapd_map_data;
+
+static void *
+slapd_rw_config( const char *fname, int lineno, int argc, char **argv )
+{
+ slapd_map_data *ret = NULL;
+ LDAPURLDesc *lud = NULL;
+ char *uri;
+ AttributeDescription *ad = NULL;
+ int rc, flen = 0;
+ struct berval dn, ndn;
+
+ if ( argc != 1 ) {
+ Debug( LDAP_DEBUG_ANY,
+ "[%s:%d] slapd map needs URI\n",
+ fname, lineno, 0 );
+ return NULL;
+ }
+
+ uri = argv[0];
+ if ( strncasecmp( uri, "uri=", STRLENOF( "uri=" ) ) == 0 ) {
+ uri += STRLENOF( "uri=" );
+ }
+
+ if ( ldap_url_parse( uri, &lud ) != LDAP_URL_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY,
+ "[%s:%d] illegal URI '%s'\n",
+ fname, lineno, uri );
+ return NULL;
+ }
+
+ if ( strcasecmp( lud->lud_scheme, "ldap" )) {
+ Debug( LDAP_DEBUG_ANY,
+ "[%s:%d] illegal URI scheme '%s'\n",
+ fname, lineno, lud->lud_scheme );
+ goto done;
+ }
+
+ if (( lud->lud_host && lud->lud_host[0] ) || lud->lud_exts
+ || !lud->lud_dn ) {
+ Debug( LDAP_DEBUG_ANY,
+ "[%s:%d] illegal URI '%s'\n",
+ fname, lineno, uri );
+ goto done;
+ }
+
+ if ( lud->lud_attrs ) {
+ if ( lud->lud_attrs[1] ) {
+ Debug( LDAP_DEBUG_ANY,
+ "[%s:%d] only one attribute allowed in URI\n",
+ fname, lineno, 0 );
+ goto done;
+ }
+ if ( strcasecmp( lud->lud_attrs[0], "dn" ) &&
+ strcasecmp( lud->lud_attrs[0], "entryDN" )) {
+ const char *text;
+ rc = slap_str2ad( lud->lud_attrs[0], &ad, &text );
+ if ( rc )
+ goto done;
+ }
+ }
+ ber_str2bv( lud->lud_dn, 0, 0, &dn );
+ if ( dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ))
+ goto done;
+
+ if ( lud->lud_filter ) {
+ flen = strlen( lud->lud_filter ) + 1;
+ }
+ ret = ch_malloc( sizeof( slapd_map_data ) + flen );
+ ret->base = ndn;
+ if ( flen ) {
+ ret->filter.bv_val = (char *)(ret+1);
+ ret->filter.bv_len = flen - 1;
+ strcpy( ret->filter.bv_val, lud->lud_filter );
+ } else {
+ BER_BVZERO( &ret->filter );
+ }
+ ret->scope = lud->lud_scope;
+ if ( ad ) {
+ ret->attrs[0].an_name = ad->ad_cname;
+ } else {
+ BER_BVZERO( &ret->attrs[0].an_name );
+ }
+ ret->attrs[0].an_desc = ad;
+ BER_BVZERO( &ret->attrs[1].an_name );
+done:
+ ldap_free_urldesc( lud );
+ return ret;
+}
+
+struct slapd_rw_info {
+ slapd_map_data *si_data;
+ struct berval si_val;
+};
+
+static int
+slapd_rw_cb( Operation *op, SlapReply *rs )
+{
+ if ( rs->sr_type == REP_SEARCH ) {
+ struct slapd_rw_info *si = op->o_callback->sc_private;
+
+ if ( si->si_data->attrs[0].an_desc ) {
+ Attribute *a;
+
+ a = attr_find( rs->sr_entry->e_attrs,
+ si->si_data->attrs[0].an_desc );
+ if ( a ) {
+ ber_dupbv( &si->si_val, a->a_vals );
+ }
+ } else {
+ ber_dupbv( &si->si_val, &rs->sr_entry->e_name );
+ }
+ }
+ return LDAP_SUCCESS;
+}
+
+static int
+slapd_rw_apply( void *private, const char *filter, struct berval *val )
+{
+ slapd_map_data *sl = private;
+ slap_callback cb = { NULL };
+ Connection conn = {0};
+ OperationBuffer opbuf;
+ Operation *op;
+ void *thrctx;
+ SlapReply rs = {REP_RESULT};
+ struct slapd_rw_info si;
+ char *ptr;
+ int rc;
+
+ thrctx = ldap_pvt_thread_pool_context();
+ connection_fake_init2( &conn, &opbuf, thrctx, 0 );
+ op = &opbuf.ob_op;
+
+ op->o_tag = LDAP_REQ_SEARCH;
+ op->o_req_dn = op->o_req_ndn = sl->base;
+ op->o_bd = select_backend( &op->o_req_ndn, 1 );
+ if ( !op->o_bd ) {
+ return REWRITE_ERR;
+ }
+ si.si_data = sl;
+ BER_BVZERO( &si.si_val );
+ op->ors_scope = sl->scope;
+ op->ors_deref = LDAP_DEREF_NEVER;
+ op->ors_slimit = 1;
+ op->ors_tlimit = SLAP_NO_LIMIT;
+ if ( sl->attrs[0].an_desc ) {
+ op->ors_attrs = sl->attrs;
+ } else {
+ op->ors_attrs = slap_anlist_no_attrs;
+ }
+ if ( filter ) {
+ rc = strlen( filter );
+ } else {
+ rc = 0;
+ }
+ rc += sl->filter.bv_len;
+ ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( rc + 1, op->o_tmpmemctx );
+ if ( sl->filter.bv_len ) {
+ ptr = lutil_strcopy( ptr, sl->filter.bv_val );
+ } else {
+ *ptr = '\0';
+ }
+ if ( filter ) {
+ strcpy( ptr, filter );
+ }
+ op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
+ if ( !op->ors_filter ) {
+ op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+ return REWRITE_ERR;
+ }
+
+ op->ors_attrsonly = 0;
+ op->o_dn = op->o_bd->be_rootdn;
+ op->o_ndn = op->o_bd->be_rootndn;
+ op->o_do_not_cache = 1;
+
+ cb.sc_response = slapd_rw_cb;
+ cb.sc_private = &si;
+ op->o_callback = &cb;
+
+ rc = op->o_bd->be_search( op, &rs );
+ if ( rc == LDAP_SUCCESS && !BER_BVISNULL( &si.si_val )) {
+ *val = si.si_val;
+ rc = REWRITE_SUCCESS;
+ } else {
+ if ( !BER_BVISNULL( &si.si_val )) {
+ ch_free( si.si_val.bv_val );
+ }
+ rc = REWRITE_ERR;
+ }
+ filter_free_x( op, op->ors_filter, 1 );
+ op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+ return rc;
+}
+
+static int
+slapd_rw_destroy( void *private )
+{
+ slapd_map_data *md = private;
+
+ assert( private != NULL );
+
+ ch_free( md->base.bv_val );
+ ch_free( md );
+
+ return 0;
+}
+
+static const rewrite_mapper slapd_mapper = {
+ "slapd",
+ slapd_rw_config,
+ slapd_rw_apply,
+ slapd_rw_destroy
+};
+#endif
+
+int slap_sasl_init( void )
+{
+#ifdef HAVE_CYRUS_SASL
+ int rc;
+ static sasl_callback_t server_callbacks[] = {
+ { SASL_CB_LOG, (slap_sasl_cb_ft)&slap_sasl_log, NULL },
+ { SASL_CB_GETOPT, (slap_sasl_cb_ft)&slap_sasl_getopt, NULL },
+ { SASL_CB_LIST_END, NULL, NULL }
+ };
+#endif
+
+#ifdef ENABLE_REWRITE
+ rewrite_mapper_register( &slapd_mapper );
+#endif
+
+#ifdef HAVE_CYRUS_SASL
+#ifdef HAVE_SASL_VERSION
+ /* stringify the version number, sasl.h doesn't do it for us */
+#define VSTR0(maj, min, pat) #maj "." #min "." #pat
+#define VSTR(maj, min, pat) VSTR0(maj, min, pat)
+#define SASL_VERSION_STRING VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
+ SASL_VERSION_STEP)
+
+ sasl_version( NULL, &rc );
+ if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
+ (rc & 0xffff) < SASL_VERSION_STEP)
+ {
+ char version[sizeof("xxx.xxx.xxxxx")];
+ sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
+ rc & 0xffff );
+ Debug( LDAP_DEBUG_ANY, "slap_sasl_init: SASL library version mismatch:"
+ " expected %s, got %s\n",
+ SASL_VERSION_STRING, version, 0 );
+ return -1;
+ }
+#endif
+
+ sasl_set_mutex(
+ ldap_pvt_sasl_mutex_new,
+ ldap_pvt_sasl_mutex_lock,
+ ldap_pvt_sasl_mutex_unlock,
+ ldap_pvt_sasl_mutex_dispose );
+
+ generic_filter.f_desc = slap_schema.si_ad_objectClass;
+
+ rc = sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
+ if( rc != SASL_OK ) {
+ Debug( LDAP_DEBUG_ANY, "slap_sasl_init: auxprop add plugin failed\n",
+ 0, 0, 0 );
+ return -1;
+ }
+
+ /* should provide callbacks for logging */
+ /* server name should be configurable */
+ rc = sasl_server_init( server_callbacks, "slapd" );
+
+ if( rc != SASL_OK ) {
+ Debug( LDAP_DEBUG_ANY, "slap_sasl_init: server init failed\n",
+ 0, 0, 0 );
+
+ return -1;
+ }
+
+#ifdef SLAPD_SPASSWD
+ lutil_passwd_add( &sasl_pwscheme, chk_sasl, NULL );
+#endif
+
+ Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
+ 0, 0, 0 );
+
+ /* default security properties */
+ memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
+ sasl_secprops.max_ssf = INT_MAX;
+ sasl_secprops.maxbufsize = 65536;
+ sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
+#endif
+
+ return 0;
+}
+
+int slap_sasl_destroy( void )
+{
+#ifdef HAVE_CYRUS_SASL
+ sasl_done();
+#endif
+ free( sasl_host );
+ sasl_host = NULL;
+
+ return 0;
+}
+
+static char *
+slap_sasl_peer2ipport( struct berval *peer )
+{
+ int isv6 = 0;
+ char *ipport, *p,
+ *addr = &peer->bv_val[ STRLENOF( "IP=" ) ];
+ ber_len_t plen = peer->bv_len - STRLENOF( "IP=" );
+
+ /* IPv6? */
+ if ( addr[0] == '[' ) {
+ isv6 = 1;
+ plen--;
+ }
+ ipport = ch_strdup( &addr[isv6] );
+
+ /* Convert IPv6/IPv4 addresses to address;port syntax. */
+ p = strrchr( ipport, ':' );
+ if ( p != NULL ) {
+ *p = ';';
+ if ( isv6 ) {
+ assert( p[-1] == ']' );
+ AC_MEMCPY( &p[-1], p, plen - ( p - ipport ) + 1 );
+ }
+
+ } else if ( isv6 ) {
+ /* trim ']' */
+ plen--;
+ assert( addr[plen] == ']' );
+ addr[plen] = '\0';
+ }
+
+ return ipport;
+}
+
+int slap_sasl_open( Connection *conn, int reopen )
+{
+ int sc = LDAP_SUCCESS;
+#ifdef HAVE_CYRUS_SASL
+ int cb;
+
+ sasl_conn_t *ctx = NULL;
+ sasl_callback_t *session_callbacks;
+ char *ipremoteport = NULL, *iplocalport = NULL;
+
+ assert( conn->c_sasl_authctx == NULL );
+
+ if ( !reopen ) {
+ assert( conn->c_sasl_extra == NULL );
+
+ session_callbacks =
+ SLAP_CALLOC( 5, sizeof(sasl_callback_t));
+ if( session_callbacks == NULL ) {
+ Debug( LDAP_DEBUG_ANY,
+ "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
+ return -1;
+ }
+ conn->c_sasl_extra = session_callbacks;
+
+ session_callbacks[cb=0].id = SASL_CB_LOG;
+ session_callbacks[cb].proc = (slap_sasl_cb_ft)&slap_sasl_log;
+ session_callbacks[cb++].context = conn;
+
+ session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
+ session_callbacks[cb].proc = (slap_sasl_cb_ft)&slap_sasl_authorize;
+ session_callbacks[cb++].context = conn;
+
+ session_callbacks[cb].id = SASL_CB_CANON_USER;
+ session_callbacks[cb].proc = (slap_sasl_cb_ft)&slap_sasl_canonicalize;
+ session_callbacks[cb++].context = conn;
+
+ session_callbacks[cb].id = SASL_CB_LIST_END;
+ session_callbacks[cb].proc = NULL;
+ session_callbacks[cb++].context = NULL;
+ } else {
+ session_callbacks = conn->c_sasl_extra;
+ }
+
+ conn->c_sasl_layers = 0;
+
+ /* create new SASL context */
+ if ( conn->c_sock_name.bv_len != 0 &&
+ strncmp( conn->c_sock_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
+ {
+ iplocalport = slap_sasl_peer2ipport( &conn->c_sock_name );
+ }
+
+ if ( conn->c_peer_name.bv_len != 0 &&
+ strncmp( conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
+ {
+ ipremoteport = slap_sasl_peer2ipport( &conn->c_peer_name );
+ }
+
+ sc = sasl_server_new( "ldap", sasl_host, global_realm,
+ iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
+ if ( iplocalport != NULL ) {
+ ch_free( iplocalport );
+ }
+ if ( ipremoteport != NULL ) {
+ ch_free( ipremoteport );
+ }
+
+ if( sc != SASL_OK ) {
+ Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
+ sc, 0, 0 );
+
+ return -1;
+ }
+
+ conn->c_sasl_authctx = ctx;
+
+ if( sc == SASL_OK ) {
+ sc = sasl_setprop( ctx,
+ SASL_SEC_PROPS, &sasl_secprops );
+
+ if( sc != SASL_OK ) {
+ Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
+ sc, 0, 0 );
+
+ slap_sasl_close( conn );
+ return -1;
+ }
+ }
+
+ sc = slap_sasl_err2ldap( sc );
+
+#elif defined(SLAP_BUILTIN_SASL)
+ /* built-in SASL implementation */
+ SASL_CTX *ctx = (SASL_CTX *) SLAP_MALLOC(sizeof(SASL_CTX));
+ if( ctx == NULL ) return -1;
+
+ ctx->sc_external_ssf = 0;
+ BER_BVZERO( &ctx->sc_external_id );
+
+ conn->c_sasl_authctx = ctx;
+#endif
+
+ return sc;
+}
+
+int slap_sasl_external(
+ Connection *conn,
+ slap_ssf_t ssf,
+ struct berval *auth_id )
+{
+#ifdef HAVE_CYRUS_SASL
+ int sc;
+ sasl_conn_t *ctx = conn->c_sasl_authctx;
+ sasl_ssf_t sasl_ssf = ssf;
+
+ if ( ctx == NULL ) {
+ return LDAP_UNAVAILABLE;
+ }
+
+ sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
+
+ if ( sc != SASL_OK ) {
+ return LDAP_OTHER;
+ }
+
+ sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL,
+ auth_id ? auth_id->bv_val : NULL );
+
+ if ( sc != SASL_OK ) {
+ return LDAP_OTHER;
+ }
+#elif defined(SLAP_BUILTIN_SASL)
+ /* built-in SASL implementation */
+ SASL_CTX *ctx = conn->c_sasl_authctx;
+ if ( ctx == NULL ) return LDAP_UNAVAILABLE;
+
+ ctx->sc_external_ssf = ssf;
+ if( auth_id ) {
+ ctx->sc_external_id = *auth_id;
+ BER_BVZERO( auth_id );
+ } else {
+ BER_BVZERO( &ctx->sc_external_id );
+ }
+#endif
+
+ return LDAP_SUCCESS;
+}
+
+int slap_sasl_reset( Connection *conn )
+{
+ return LDAP_SUCCESS;
+}
+
+char ** slap_sasl_mechs( Connection *conn )
+{
+ char **mechs = NULL;
+
+#ifdef HAVE_CYRUS_SASL
+ sasl_conn_t *ctx = conn->c_sasl_authctx;
+
+ if( ctx == NULL ) ctx = conn->c_sasl_sockctx;
+
+ if( ctx != NULL ) {
+ int sc;
+ SASL_CONST char *mechstr;
+
+ sc = sasl_listmech( ctx,
+ NULL, NULL, ",", NULL,
+ &mechstr, NULL, NULL );
+
+ if( sc != SASL_OK ) {
+ Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
+ sc, 0, 0 );
+
+ return NULL;
+ }
+
+ mechs = ldap_str2charray( mechstr, "," );
+ }
+#elif defined(SLAP_BUILTIN_SASL)
+ /* builtin SASL implementation */
+ SASL_CTX *ctx = conn->c_sasl_authctx;
+ if ( ctx != NULL && ctx->sc_external_id.bv_val ) {
+ /* should check ssf */
+ mechs = ldap_str2charray( "EXTERNAL", "," );
+ }
+#endif
+
+ return mechs;
+}
+
+int slap_sasl_close( Connection *conn )
+{
+#ifdef HAVE_CYRUS_SASL
+ sasl_conn_t *ctx = conn->c_sasl_authctx;
+
+ if( ctx != NULL ) {
+ sasl_dispose( &ctx );
+ }
+ if ( conn->c_sasl_sockctx &&
+ conn->c_sasl_authctx != conn->c_sasl_sockctx )
+ {
+ ctx = conn->c_sasl_sockctx;
+ sasl_dispose( &ctx );
+ }
+
+ conn->c_sasl_authctx = NULL;
+ conn->c_sasl_sockctx = NULL;
+ conn->c_sasl_done = 0;
+
+ free( conn->c_sasl_extra );
+ conn->c_sasl_extra = NULL;
+
+#elif defined(SLAP_BUILTIN_SASL)
+ SASL_CTX *ctx = conn->c_sasl_authctx;
+ if( ctx ) {
+ if( ctx->sc_external_id.bv_val ) {
+ free( ctx->sc_external_id.bv_val );
+ BER_BVZERO( &ctx->sc_external_id );
+ }
+ free( ctx );
+ conn->c_sasl_authctx = NULL;
+ }
+#endif
+
+ return LDAP_SUCCESS;
+}
+
+int slap_sasl_bind( Operation *op, SlapReply *rs )
+{
+#ifdef HAVE_CYRUS_SASL
+ sasl_conn_t *ctx = op->o_conn->c_sasl_authctx;
+ struct berval response;
+ unsigned reslen = 0;
+ int sc;
+
+ Debug(LDAP_DEBUG_ARGS,
+ "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
+ op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
+ op->o_conn->c_sasl_bind_in_progress ? "<continuing>" :
+ op->o_conn->c_sasl_bind_mech.bv_val,
+ op->orb_cred.bv_len );
+
+ if( ctx == NULL ) {
+ send_ldap_error( op, rs, LDAP_UNAVAILABLE,
+ "SASL unavailable on this session" );
+ return rs->sr_err;
+ }
+
+#define START( ctx, mech, cred, clen, resp, rlen, err ) \
+ sasl_server_start( ctx, mech, cred, clen, resp, rlen )
+#define STEP( ctx, cred, clen, resp, rlen, err ) \
+ sasl_server_step( ctx, cred, clen, resp, rlen )
+
+ if ( !op->o_conn->c_sasl_bind_in_progress ) {
+ /* If we already authenticated once, must use a new context */
+ if ( op->o_conn->c_sasl_done ) {
+ sasl_ssf_t ssf = 0;
+ sasl_ssf_t *ssfp = NULL;
+ const char *authid = NULL;
+
+ sasl_getprop( ctx, SASL_SSF_EXTERNAL, (void *)&ssfp );
+ if ( ssfp ) ssf = *ssfp;
+
+ sasl_getprop( ctx, SASL_AUTH_EXTERNAL, (void *)&authid );
+ if ( authid ) authid = ch_strdup( authid );
+
+ if ( ctx != op->o_conn->c_sasl_sockctx ) {
+ sasl_dispose( &ctx );
+ }
+ op->o_conn->c_sasl_authctx = NULL;
+
+ slap_sasl_open( op->o_conn, 1 );
+ ctx = op->o_conn->c_sasl_authctx;
+ sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
+ if ( authid ) {
+ sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
+ ch_free( (char *)authid );
+ }
+ }
+ sc = START( ctx,
+ op->o_conn->c_sasl_bind_mech.bv_val,
+ op->orb_cred.bv_val, op->orb_cred.bv_len,
+ (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
+
+ } else {
+ sc = STEP( ctx,
+ op->orb_cred.bv_val, op->orb_cred.bv_len,
+ (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
+ }
+
+ response.bv_len = reslen;
+
+ if ( sc == SASL_OK ) {
+ sasl_ssf_t *ssf = NULL;
+
+ ber_dupbv_x( &op->orb_edn, &op->o_conn->c_sasl_dn, op->o_tmpmemctx );
+ BER_BVZERO( &op->o_conn->c_sasl_dn );
+ op->o_conn->c_sasl_done = 1;
+
+ rs->sr_err = LDAP_SUCCESS;
+
+ (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
+ op->orb_ssf = ssf ? *ssf : 0;
+
+ ctx = NULL;
+ if( op->orb_ssf ) {
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+ op->o_conn->c_sasl_layers++;
+
+ /* If there's an old layer, set sockctx to NULL to
+ * tell connection_read() to wait for us to finish.
+ * Otherwise there is a race condition: we have to
+ * send the Bind response using the old security
+ * context and then remove it before reading any
+ * new messages.
+ */
+ if ( op->o_conn->c_sasl_sockctx ) {
+ ctx = op->o_conn->c_sasl_sockctx;
+ op->o_conn->c_sasl_sockctx = NULL;
+ } else {
+ op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
+ }
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+ }
+
+ /* Must send response using old security layer */
+ rs->sr_sasldata = (response.bv_len ? &response : NULL);
+ send_ldap_sasl( op, rs );
+
+ /* Now dispose of the old security layer.
+ */
+ if ( ctx ) {
+ ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+ ldap_pvt_sasl_remove( op->o_conn->c_sb );
+ op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
+ ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+ sasl_dispose( &ctx );
+ }
+ } else if ( sc == SASL_CONTINUE ) {
+ rs->sr_err = LDAP_SASL_BIND_IN_PROGRESS,
+ rs->sr_text = sasl_errdetail( ctx );
+ rs->sr_sasldata = &response;
+ send_ldap_sasl( op, rs );
+
+ } else {
+ BER_BVZERO( &op->o_conn->c_sasl_dn );
+ rs->sr_text = sasl_errdetail( ctx );
+ rs->sr_err = slap_sasl_err2ldap( sc ),
+ send_ldap_result( op, rs );
+ }
+
+ Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rs->sr_err, 0, 0);
+
+#elif defined(SLAP_BUILTIN_SASL)
+ /* built-in SASL implementation */
+ SASL_CTX *ctx = op->o_conn->c_sasl_authctx;
+
+ if ( ctx == NULL ) {
+ send_ldap_error( op, rs, LDAP_OTHER,
+ "Internal SASL Error" );
+
+ } else if ( bvmatch( &ext_bv, &op->o_conn->c_sasl_bind_mech ) ) {
+ /* EXTERNAL */
+
+ if( op->orb_cred.bv_len ) {
+ rs->sr_text = "proxy authorization not supported";
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ send_ldap_result( op, rs );
+
+ } else {
+ op->orb_edn = ctx->sc_external_id;
+ rs->sr_err = LDAP_SUCCESS;
+ rs->sr_sasldata = NULL;
+ send_ldap_sasl( op, rs );
+ }
+
+ } else {
+ send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
+ "requested SASL mechanism not supported" );
+ }
+#else
+ send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
+ "SASL not supported" );
+#endif
+
+ return rs->sr_err;
+}
+
+char* slap_sasl_secprops( const char *in )
+{
+#ifdef HAVE_CYRUS_SASL
+ int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
+
+ return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
+#else
+ return "SASL not supported";
+#endif
+}
+
+void slap_sasl_secprops_unparse( struct berval *bv )
+{
+#ifdef HAVE_CYRUS_SASL
+ ldap_pvt_sasl_secprops_unparse( &sasl_secprops, bv );
+#endif
+}
+
+#ifdef HAVE_CYRUS_SASL
+int
+slap_sasl_setpass( Operation *op, SlapReply *rs )
+{
+ struct berval id = BER_BVNULL; /* needs to come from connection */
+ struct berval new = BER_BVNULL;
+ struct berval old = BER_BVNULL;
+
+ assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
+
+ rs->sr_err = sasl_getprop( op->o_conn->c_sasl_authctx, SASL_USERNAME,
+ (SASL_CONST void **)(char *)&id.bv_val );
+
+ if( rs->sr_err != SASL_OK ) {
+ rs->sr_text = "unable to retrieve SASL username";
+ rs->sr_err = LDAP_OTHER;
+ goto done;
+ }
+
+ Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
+ id.bv_val ? id.bv_val : "", 0, 0 );
+
+ rs->sr_err = slap_passwd_parse( op->ore_reqdata,
+ NULL, &old, &new, &rs->sr_text );
+
+ if( rs->sr_err != LDAP_SUCCESS ) {
+ goto done;
+ }
+
+ if( new.bv_len == 0 ) {
+ slap_passwd_generate(&new);
+
+ if( new.bv_len == 0 ) {
+ rs->sr_text = "password generation failed.";
+ rs->sr_err = LDAP_OTHER;
+ goto done;
+ }
+
+ rs->sr_rspdata = slap_passwd_return( &new );
+ }
+
+ rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx, id.bv_val,
+ new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
+ if( rs->sr_err != SASL_OK ) {
+ rs->sr_text = sasl_errdetail( op->o_conn->c_sasl_authctx );
+ }
+ switch(rs->sr_err) {
+ case SASL_OK:
+ rs->sr_err = LDAP_SUCCESS;
+ break;
+
+ case SASL_NOCHANGE:
+ case SASL_NOMECH:
+ case SASL_DISABLED:
+ case SASL_PWLOCK:
+ case SASL_FAIL:
+ case SASL_BADPARAM:
+ default:
+ rs->sr_err = LDAP_OTHER;
+ }
+
+done:
+ return rs->sr_err;
+}
+#endif /* HAVE_CYRUS_SASL */
+
+/* Take any sort of identity string and return a DN with the "dn:" prefix. The
+ * string returned in *dn is in its own allocated memory, and must be free'd
+ * by the calling process. -Mark Adamson, Carnegie Mellon
+ *
+ * The "dn:" prefix is no longer used anywhere inside slapd. It is only used
+ * on strings passed in directly from SASL. -Howard Chu, Symas Corp.
+ */
+
+#define SET_NONE 0
+#define SET_DN 1
+#define SET_U 2
+
+int slap_sasl_getdn( Connection *conn, Operation *op, struct berval *id,
+ char *user_realm, struct berval *dn, int flags )
+{
+ int rc, is_dn = SET_NONE, do_norm = 1;
+ struct berval dn2, *mech;
+
+ assert( conn != NULL );
+ assert( id != NULL );
+
+ Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: conn %lu id=%s [len=%lu]\n",
+ conn->c_connid,
+ BER_BVISNULL( id ) ? "NULL" : ( BER_BVISEMPTY( id ) ? "<empty>" : id->bv_val ),
+ BER_BVISNULL( id ) ? 0 : ( BER_BVISEMPTY( id ) ? 0 :
+ (unsigned long) id->bv_len ) );
+
+ if ( !op ) {
+ op = conn->c_sasl_bindop;
+ }
+ assert( op != NULL );
+
+ BER_BVZERO( dn );
+
+ if ( !BER_BVISNULL( id ) ) {
+ /* Blatantly anonymous ID */
+ static struct berval bv_anonymous = BER_BVC( "anonymous" );
+
+ if ( ber_bvstrcasecmp( id, &bv_anonymous ) == 0 ) {
+ return( LDAP_SUCCESS );
+ }
+
+ } else {
+ /* FIXME: if empty, should we stop? */
+ BER_BVSTR( id, "" );
+ }
+
+ if ( !BER_BVISEMPTY( &conn->c_sasl_bind_mech ) ) {
+ mech = &conn->c_sasl_bind_mech;
+ } else {
+ mech = &conn->c_authmech;
+ }
+
+ /* An authcID needs to be converted to authzID form. Set the
+ * values directly into *dn; they will be normalized later. (and
+ * normalizing always makes a new copy.) An ID from a TLS certificate
+ * is already normalized, so copy it and skip normalization.
+ */
+ if( flags & SLAP_GETDN_AUTHCID ) {
+ if( bvmatch( mech, &ext_bv )) {
+ /* EXTERNAL DNs are already normalized */
+ assert( !BER_BVISNULL( id ) );
+
+ do_norm = 0;
+ is_dn = SET_DN;
+ ber_dupbv_x( dn, id, op->o_tmpmemctx );
+
+ } else {
+ /* convert to u:<username> form */
+ is_dn = SET_U;
+ *dn = *id;
+ }
+ }
+
+ if( is_dn == SET_NONE ) {
+ if( !strncasecmp( id->bv_val, "u:", STRLENOF( "u:" ) ) ) {
+ is_dn = SET_U;
+ dn->bv_val = id->bv_val + STRLENOF( "u:" );
+ dn->bv_len = id->bv_len - STRLENOF( "u:" );
+
+ } else if ( !strncasecmp( id->bv_val, "dn:", STRLENOF( "dn:" ) ) ) {
+ is_dn = SET_DN;
+ dn->bv_val = id->bv_val + STRLENOF( "dn:" );
+ dn->bv_len = id->bv_len - STRLENOF( "dn:" );
+ }
+ }
+
+ /* No other possibilities from here */
+ if( is_dn == SET_NONE ) {
+ BER_BVZERO( dn );
+ return( LDAP_INAPPROPRIATE_AUTH );
+ }
+
+ /* Username strings */
+ if( is_dn == SET_U ) {
+ /* ITS#3419: values may need escape */
+ LDAPRDN DN[ 5 ];
+ LDAPAVA *RDNs[ 4 ][ 2 ];
+ LDAPAVA AVAs[ 4 ];
+ int irdn;
+
+ irdn = 0;
+ DN[ irdn ] = RDNs[ irdn ];
+ RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
+ AVAs[ irdn ].la_attr = slap_schema.si_ad_uid->ad_cname;
+ AVAs[ irdn ].la_value = *dn;
+ AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
+ AVAs[ irdn ].la_private = NULL;
+ RDNs[ irdn ][ 1 ] = NULL;
+
+ if ( user_realm && *user_realm ) {
+ irdn++;
+ DN[ irdn ] = RDNs[ irdn ];
+ RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
+ AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
+ ber_str2bv( user_realm, 0, 0, &AVAs[ irdn ].la_value );
+ AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
+ AVAs[ irdn ].la_private = NULL;
+ RDNs[ irdn ][ 1 ] = NULL;
+ }
+
+ if ( !BER_BVISNULL( mech ) ) {
+ irdn++;
+ DN[ irdn ] = RDNs[ irdn ];
+ RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
+ AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
+ AVAs[ irdn ].la_value = *mech;
+ AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
+ AVAs[ irdn ].la_private = NULL;
+ RDNs[ irdn ][ 1 ] = NULL;
+ }
+
+ irdn++;
+ DN[ irdn ] = RDNs[ irdn ];
+ RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
+ AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
+ BER_BVSTR( &AVAs[ irdn ].la_value, "auth" );
+ AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
+ AVAs[ irdn ].la_private = NULL;
+ RDNs[ irdn ][ 1 ] = NULL;
+
+ irdn++;
+ DN[ irdn ] = NULL;
+
+ rc = ldap_dn2bv_x( DN, dn, LDAP_DN_FORMAT_LDAPV3,
+ op->o_tmpmemctx );
+ if ( rc != LDAP_SUCCESS ) {
+ BER_BVZERO( dn );
+ return rc;
+ }
+
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_sasl_getdn: u:id converted to %s\n",
+ dn->bv_val, 0, 0 );
+
+ } else {
+
+ /* Dup the DN in any case, so we don't risk
+ * leaks or dangling pointers later,
+ * and the DN value is '\0' terminated */
+ ber_dupbv_x( &dn2, dn, op->o_tmpmemctx );
+ dn->bv_val = dn2.bv_val;
+ }
+
+ /* All strings are in DN form now. Normalize if needed. */
+ if ( do_norm ) {
+ rc = dnNormalize( 0, NULL, NULL, dn, &dn2, op->o_tmpmemctx );
+
+ /* User DNs were constructed above and must be freed now */
+ slap_sl_free( dn->bv_val, op->o_tmpmemctx );
+
+ if ( rc != LDAP_SUCCESS ) {
+ BER_BVZERO( dn );
+ return rc;
+ }
+ *dn = dn2;
+ }
+
+ /* Run thru regexp */
+ slap_sasl2dn( op, dn, &dn2, flags );
+ if( !BER_BVISNULL( &dn2 ) ) {
+ slap_sl_free( dn->bv_val, op->o_tmpmemctx );
+ *dn = dn2;
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_sasl_getdn: dn:id converted to %s\n",
+ dn->bv_val, 0, 0 );
+ }
+
+ return( LDAP_SUCCESS );
+}