+#include <stdio.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+
+#include <lber.h>
+#include <ldap_log.h>
+
+#include "slap.h"
+
+#include <limits.h>
+
+#ifdef HAVE_CYRUS_SASL
+# ifdef HAVE_SASL_SASL_H
+# include <sasl/sasl.h>
+# else
+# include <sasl.h>
+# endif
+
+# if SASL_VERSION_MAJOR >= 2
+# ifdef HAVE_SASL_SASL_H
+# include <sasl/saslplug.h>
+# else
+# include <saslplug.h>
+# endif
+# define SASL_CONST const
+# else
+# define SASL_CONST
+# endif
+
+#define SASL_VERSION_FULL ((SASL_VERSION_MAJOR << 16) |\
+ (SASL_VERSION_MINOR << 8) | SASL_VERSION_STEP)
+
+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 "ldap_pvt.h"
+#include "lber_pvt.h"
+#include <lutil.h>
+
+static struct berval ext_bv = BER_BVC( "EXTERNAL" );
+
+int slap_sasl_config( int cargc, char **cargv, char *line,
+ const char *fname, int lineno )
+{
+ /* set SASL proxy authorization policy */
+ if ( strcasecmp( cargv[0], "sasl-authz-policy" ) == 0 ) {
+ if ( cargc != 2 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d: missing policy in"
+ " \"sasl-authz-policy <policy>\" line\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: missing policy in"
+ " \"sasl-authz-policy <policy>\" line\n",
+ fname, lineno, 0 );
+#endif
+
+ return( 1 );
+ }
+ if ( slap_sasl_setpolicy( cargv[1] ) ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d: unable "
+ "to parse value \"%s\" "
+ "in \"sasl-authz-policy "
+ "<policy>\" line.\n",
+ fname, lineno, cargv[1] );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: unable "
+ "to parse value \"%s\" "
+ "in \"sasl-authz-policy "
+ "<policy>\" line\n",
+ fname, lineno, cargv[1] );
+#endif
+ return( 1 );
+ }
+
+ } else if ( !strcasecmp( cargv[0], "sasl-regexp" )
+ || !strcasecmp( cargv[0], "saslregexp" ) )
+ {
+ int rc;
+ if ( cargc != 3 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d: need 2 args in "
+ "\"saslregexp <match> <replace>\"\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: need 2 args in "
+ "\"saslregexp <match> <replace>\"\n",
+ fname, lineno, 0 );
+#endif
+
+ return( 1 );
+ }
+ rc = slap_sasl_regexp_config( cargv[1], cargv[2] );
+ if ( rc ) {
+ return rc;
+ }
+
+#ifdef HAVE_CYRUS_SASL
+ /* set SASL host */
+ } else if ( strcasecmp( cargv[0], "sasl-host" ) == 0 ) {
+ if ( cargc < 2 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d: missing host in \"sasl-host <host>\" line\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: missing host in \"sasl-host <host>\" line\n",
+ fname, lineno, 0 );
+#endif
+
+ return( 1 );
+ }
+
+ if ( global_host != NULL ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d: already set sasl-host!\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: already set sasl-host!\n",
+ fname, lineno, 0 );
+#endif
+
+ return 1;
+
+ } else {
+ global_host = ch_strdup( cargv[1] );
+ }
+
+ /* set SASL realm */
+ } else if ( strcasecmp( cargv[0], "sasl-realm" ) == 0 ) {
+ if ( cargc < 2 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT, "%s: line %d: "
+ "missing realm in \"sasl-realm <realm>\" line.\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+ "missing realm in \"sasl-realm <realm>\" line.\n",
+ fname, lineno, 0 );
+#endif
+
+ return( 1 );
+ }
+
+ if ( global_realm != NULL ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d: already set sasl-realm!\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: already set sasl-realm!\n",
+ fname, lineno, 0 );
+#endif
+
+ return 1;
+
+ } else {
+ global_realm = ch_strdup( cargv[1] );
+ }
+
+ /* SASL security properties */
+ } else if ( strcasecmp( cargv[0], "sasl-secprops" ) == 0 ) {
+ char *txt;
+
+ if ( cargc < 2 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT, "%s: line %d: "
+ "missing flags in \"sasl-secprops <properties>\" line\n",
+ fname, lineno, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+ "missing flags in \"sasl-secprops <properties>\" line\n",
+ fname, lineno, 0 );
+#endif
+
+ return 1;
+ }
+
+ txt = slap_sasl_secprops( cargv[1] );
+ if ( txt != NULL ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( CONFIG, CRIT,
+ "%s: line %d sasl-secprops: %s\n",
+ fname, lineno, txt );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "%s: line %d: sasl-secprops: %s\n",
+ fname, lineno, txt );
+#endif
+
+ return 1;
+ }
+#endif /* HAVE_CYRUS_SASL */
+ }
+
+ return LDAP_SUCCESS;
+}
+
+#ifdef HAVE_CYRUS_SASL
+
+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) {
+#if SASL_VERSION_MAJOR >= 2
+ 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;
+#else
+ case SASL_LOG_ERR:
+ level = LDAP_DEBUG_ANY;
+ label = "Error";
+ break;
+ case SASL_LOG_WARNING:
+ level = LDAP_DEBUG_TRACE;
+ label = "Warning";
+ break;
+ case SASL_LOG_INFO:
+ level = LDAP_DEBUG_TRACE;
+ label = "Info";
+ break;
+#endif
+ default:
+ return SASL_BADPARAM;
+ }
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "SASL [conn=%ld] %s: %s\n", conn ? conn->c_connid : -1, label, message);
+#else
+ Debug( level, "SASL [conn=%ld] %s: %s\n",
+ conn ? conn->c_connid: -1,
+ label, message );
+#endif
+
+
+ return SASL_OK;
+}
+
+
+#if SASL_VERSION_MAJOR >= 2
+static const char *slap_propnames[] = {
+ "*slapConn", "*authcDN", "*authzDN", NULL };
+
+static Filter generic_filter = { LDAP_FILTER_PRESENT };
+static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
+
+#define PROP_CONN 0
+#define PROP_AUTHC 1
+#define PROP_AUTHZ 2
+
+typedef struct lookup_info {
+ int last;
+ int flags;
+ const struct propval *list;
+ sasl_server_params_t *sparams;
+} lookup_info;
+
+static slap_response sasl_ap_lookup, sasl_cb_checkpass;
+
+static int
+sasl_ap_lookup( Operation *op, SlapReply *rs )
+{
+ BerVarray bv;
+ AttributeDescription *ad;
+ Attribute *a;
+ const char *text;
+ int rc, i;
+ slap_callback *tmp = op->o_callback;
+ lookup_info *sl = tmp->sc_private;
+
+ if (rs->sr_type != REP_SEARCH) return 0;
+
+ for( i = 0; i < sl->last; i++ ) {
+ const char *name = sl->list[i].name;
+
+ if ( name[0] == '*' ) {
+ if ( sl->flags & SASL_AUXPROP_AUTHZID ) 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 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, DETAIL1,
+ "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
+#endif
+ 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++ ) {
+ sl->sparams->utils->prop_set( sl->sparams->propctx,
+ sl->list[i].name, bv->bv_val, bv->bv_len );
+ }
+ }
+ return LDAP_SUCCESS;
+}
+
+static void
+slap_auxprop_lookup(
+ void *glob_context,
+ sasl_server_params_t *sparams,
+ unsigned flags,
+ const char *user,
+ unsigned ulen)
+{
+ Operation op = {0};
+ int i, doit = 0;
+ Connection *conn = NULL;
+ lookup_info sl;
+
+ sl.list = sparams->utils->prop_get( sparams->propctx );
+ sl.sparams = sparams;
+ sl.flags = flags;
+
+ /* Find our DN and conn first */
+ for( i = 0, sl.last = 0; sl.list[i].name; i++ ) {
+ if ( sl.list[i].name[0] == '*' ) {
+ if ( !strcmp( sl.list[i].name, slap_propnames[PROP_CONN] ) ) {
+ if ( sl.list[i].values && sl.list[i].values[0] )
+ AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
+ if ( !sl.last ) sl.last = i;
+ }
+ if ( (flags & SASL_AUXPROP_AUTHZID) &&
+ !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHZ] ) ) {
+
+ if ( sl.list[i].values && sl.list[i].values[0] )
+ AC_MEMCPY( &op.o_req_ndn, sl.list[i].values[0], sizeof( struct berval ) );
+ if ( !sl.last ) sl.last = i;
+ break;
+ }
+ if ( !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHC] ) ) {
+ if ( !sl.last ) sl.last = i;
+ if ( sl.list[i].values && sl.list[i].values[0] ) {
+ AC_MEMCPY( &op.o_req_ndn, sl.list[i].values[0], sizeof( struct berval ) );
+ if ( !(flags & SASL_AUXPROP_AUTHZID) )
+ break;
+ }
+ }
+ }
+ }
+
+ /* Now see what else needs to be fetched */
+ for( i = 0; i < sl.last; 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 ( sl.list[i].values ) {
+ if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
+ }
+ doit = 1;
+ }
+
+ if (doit) {
+ slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
+
+ cb.sc_private = &sl;
+
+ op.o_bd = select_backend( &op.o_req_ndn, 0, 1 );
+
+ if ( op.o_bd && op.o_bd->be_search ) {
+ SlapReply rs = {REP_RESULT};
+ op.o_tag = LDAP_REQ_SEARCH;
+ op.o_protocol = LDAP_VERSION3;
+ op.o_ndn = conn->c_ndn;
+ op.o_callback = &cb;
+ op.o_time = slap_get_time();
+ op.o_do_not_cache = 1;
+ op.o_is_auth_check = 1;
+ op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
+ op.o_tmpmemctx = conn->c_sasl_bindop->o_tmpmemctx;
+ op.o_tmpmfuncs = conn->c_sasl_bindop->o_tmpmfuncs;
+ op.o_conn = conn;
+ op.o_connid = conn->c_connid;
+ op.o_req_dn = op.o_req_ndn;
+ op.ors_scope = LDAP_SCOPE_BASE;
+ op.ors_deref = LDAP_DEREF_NEVER;
+ op.ors_slimit = 1;
+ op.ors_filter = &generic_filter;
+ op.ors_filterstr = generic_filterstr;
+
+ op.o_bd->be_search( &op, &rs );
+ }
+ }
+}
+
+#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};
+ SlapReply rs = {REP_RESULT};
+ int rc, i, 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[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[PROP_AUTHC] ) ) {
+ if ( pr[i].values && pr[i].values[0] ) {
+ AC_MEMCPY( &op.o_req_ndn, pr[i].values[0], sizeof( struct berval ) );
+ }
+ }
+ }
+ }
+ if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
+
+ op.o_bd = select_backend( &op.o_req_ndn, 0, 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;
+ ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
+ 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]);
+ }
+ mod->sml_values[j].bv_val = NULL;
+ mod->sml_values[j].bv_len = 0;
+ mod->sml_nvalues = NULL;
+ mod->sml_desc = NULL;
+ *modtail = mod;
+ modtail = &mod->sml_next;
+ }
+ *modtail = NULL;
+
+ rc = slap_mods_check( modlist, 0, &text, textbuf, textlen, NULL );
+
+ if ( rc == LDAP_SUCCESS ) {
+ rc = slap_mods_opattrs( &op, modlist, modtail, &text, textbuf,
+ textlen );
+ }
+
+ if ( rc == LDAP_SUCCESS ) {
+ op.o_tag = LDAP_REQ_MODIFY;
+ op.o_protocol = LDAP_VERSION3;
+ op.o_ndn = op.o_req_ndn;
+ op.o_callback = &cb;
+ op.o_time = slap_get_time();
+ op.o_do_not_cache = 1;
+ op.o_is_auth_check = 1;
+ op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
+ op.o_tmpmemctx = conn->c_sasl_bindop->o_tmpmemctx;
+ op.o_tmpmfuncs = conn->c_sasl_bindop->o_tmpmfuncs;
+ op.o_conn = conn;
+ op.o_connid = conn->c_connid;
+ op.o_req_dn = op.o_req_ndn;
+ op.orm_modlist = modlist;
+
+ rc = op.o_bd->be_modify( &op, &rs );
+ }
+ slap_mods_free( modlist );
+ return rc ? 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;
+}
+
+typedef struct checkpass_info {
+ int rc;
+ struct berval cred;
+} checkpass_info;
+
+static int
+sasl_cb_checkpass( Operation *op, SlapReply *rs )
+{
+ slap_callback *tmp = op->o_callback;
+ checkpass_info *ci = tmp->sc_private;
+ Attribute *a;
+ struct berval *bv;
+
+ if (rs->sr_type != REP_SEARCH) return 0;
+
+ ci->rc = SASL_NOVERIFY;
+
+ a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_userPassword );
+ if ( !a ) return 0;
+ if ( ! access_allowed( op, rs->sr_entry, slap_schema.si_ad_userPassword,
+ NULL, ACL_AUTH, NULL ) ) return 0;
+
+ for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
+ if ( !lutil_passwd( bv, &ci->cred, NULL, &rs->sr_text ) ) {
+ ci->rc = SASL_OK;
+ break;
+ }
+ }
+ return 0;
+}
+
+static int
+slap_sasl_checkpass(
+ sasl_conn_t *sconn,
+ void *context,
+ const char *username,
+ const char *pass,
+ unsigned passlen,
+ struct propctx *propctx)
+{
+ Connection *conn = (Connection *)context;
+ Operation op = {0};
+ int rc;
+ checkpass_info ci;
+
+ ci.rc = SASL_NOUSER;
+
+ /* SASL will fallback to its own mechanisms if we don't
+ * find an answer here.
+ */
+
+ rc = slap_sasl_getdn( conn, NULL, (char *)username, 0, NULL, &op.o_req_ndn,
+ SLAP_GETDN_AUTHCID );
+ if ( rc != LDAP_SUCCESS ) {
+ sasl_seterror( sconn, 0, ldap_err2string( rc ) );
+ return SASL_NOUSER;
+ }
+
+ if ( op.o_req_ndn.bv_len == 0 ) {
+ sasl_seterror( sconn, 0,
+ "No password is associated with the Root DSE" );
+ if ( op.o_req_ndn.bv_val != NULL ) {
+ ch_free( op.o_req_ndn.bv_val );
+ }
+ return SASL_NOUSER;
+ }
+
+ op.o_bd = select_backend( &op.o_req_ndn, 0, 1 );
+ if ( op.o_bd && op.o_bd->be_search ) {
+ slap_callback cb = { NULL, sasl_cb_checkpass, NULL, NULL };
+ SlapReply rs = {REP_RESULT};
+
+ ci.cred.bv_val = (char *)pass;
+ ci.cred.bv_len = passlen;
+
+ cb.sc_private = &ci;
+ op.o_tag = LDAP_REQ_SEARCH;
+ op.o_protocol = LDAP_VERSION3;
+ op.o_ndn = conn->c_ndn;
+ op.o_callback = &cb;
+ op.o_time = slap_get_time();
+ op.o_do_not_cache = 1;
+ op.o_is_auth_check = 1;
+ op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
+ op.o_tmpmemctx = conn->c_sasl_bindop->o_tmpmemctx;
+ op.o_tmpmfuncs = conn->c_sasl_bindop->o_tmpmfuncs;
+ op.o_conn = conn;
+ op.o_connid = conn->c_connid;
+ op.o_req_dn = op.o_req_ndn;
+ op.ors_scope = LDAP_SCOPE_BASE;
+ op.ors_deref = LDAP_DEREF_NEVER;
+ op.ors_slimit = 1;
+ op.ors_filter = &generic_filter;
+ op.ors_filterstr = generic_filterstr;
+
+ op.o_bd->be_search( &op, &rs );
+ }
+ if ( ci.rc != SASL_OK ) {
+ sasl_seterror( sconn, 0,
+ ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
+ }
+
+ ch_free( op.o_req_ndn.bv_val );
+
+ return ci.rc;
+}
+
+/* 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[3];
+ struct berval dn;
+ int rc, which;
+ const char *names[2];
+
+ *out_len = 0;
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
+ conn ? conn->c_connid : -1,
+ (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
+ in ? in : "<empty>");
+#else
+ Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
+ conn ? conn->c_connid : -1,
+ (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
+ in ? in : "<empty>");
+#endif
+
+ /* 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;
+
+ /* 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 = PROP_AUTHC;
+ else
+ which = PROP_AUTHZ;
+
+ /* Need to store the Connection for auxprop_lookup */
+ if ( !auxvals[PROP_CONN].values ) {
+ names[0] = slap_propnames[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[PROP_AUTHZ].values ) {
+ conn->c_sasl_dn.bv_val = (char *) in;
+ } 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;
+ }
+
+ rc = slap_sasl_getdn( conn, NULL, (char *)in, inlen, (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, sizeof( dn ) );
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
+ conn ? conn->c_connid : -1, names[0]+1,
+ dn.bv_val ? dn.bv_val : "<EMPTY>" );
+#else
+ Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
+ conn ? conn->c_connid : -1, names[0]+1,
+ dn.bv_val ? dn.bv_val : "<EMPTY>" );
+#endif
+
+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;
+ struct propval auxvals[3];
+ struct berval authcDN, authzDN;
+ int rc;
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
+ conn ? conn->c_connid : -1, auth_identity, requested_user);
+#else
+ Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
+ "authcid=\"%s\" authzid=\"%s\"\n",
+ conn ? conn->c_connid : -1, auth_identity, requested_user );
+#endif
+ if ( conn->c_sasl_dn.bv_val ) {
+ ch_free( conn->c_sasl_dn.bv_val );
+ conn->c_sasl_dn.bv_val = NULL;
+ conn->c_sasl_dn.bv_len = 0;
+ }
+
+ /* Skip PROP_CONN */
+ prop_getnames( props, slap_propnames+1, auxvals );
+
+ AC_MEMCPY( &authcDN, auxvals[0].values[0], sizeof(authcDN) );
+
+ /* Nothing to do if no authzID was given */
+ if ( !auxvals[1].name || !auxvals[1].values ) {
+ conn->c_sasl_dn = authcDN;
+ goto ok;
+ }
+
+ AC_MEMCPY( &authzDN, auxvals[1].values[0], sizeof(authzDN) );
+
+ rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
+ ch_free( authcDN.bv_val );
+ if ( rc != LDAP_SUCCESS ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, INFO,
+ "slap_sasl_authorize: conn %ld "
+ "proxy authorization disallowed (%d)\n",
+ (long)(conn ? conn->c_connid : -1), rc, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
+ "proxy authorization disallowed (%d)\n",
+ (long) (conn ? conn->c_connid : -1), rc, 0 );
+#endif
+
+ sasl_seterror( sconn, 0, "not authorized" );
+ ch_free( authzDN.bv_val );
+ return SASL_NOAUTHZ;
+ }
+
+ conn->c_sasl_dn = authzDN;
+ok:
+ if (conn->c_sasl_bindop) {
+ Statslog( LDAP_DEBUG_STATS,
+ "conn=%lu op=%lu BIND authcid=\"%s\"\n",
+ conn->c_connid, conn->c_sasl_bindop->o_opid,
+ auth_identity, 0, 0);
+ }
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "slap_sasl_authorize: conn %d proxy authorization allowed\n",
+ (long)(conn ? conn->c_connid : -1), 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
+ " proxy authorization allowed\n",
+ (long) (conn ? conn->c_connid : -1), 0, 0 );
+#endif
+ return SASL_OK;
+}
+#else
+static int
+slap_sasl_authorize(
+ void *context,
+ char *authcid,
+ char *authzid,
+ const char **user,
+ const char **errstr)
+{
+ struct berval authcDN, authzDN;
+ int rc;
+ Connection *conn = context;
+ char *realm;
+
+ *user = NULL;
+ if ( conn->c_sasl_dn.bv_val ) {
+ ch_free( conn->c_sasl_dn.bv_val );
+ conn->c_sasl_dn.bv_val = NULL;
+ conn->c_sasl_dn.bv_len = 0;
+ }
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
+ conn ? conn->c_connid : -1, authcid ? authcid : "<empty>",
+ authzid ? authzid : "<empty>" );
+#else
+ Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
+ "authcid=\"%s\" authzid=\"%s\"\n",
+ (long) (conn ? conn->c_connid : -1),
+ authcid ? authcid : "<empty>",
+ authzid ? authzid : "<empty>" );
+#endif
+
+ /* Figure out how much data we have for the dn */
+ rc = sasl_getprop( conn->c_sasl_authctx, SASL_REALM, (void **)&realm );
+ if( rc != SASL_OK && rc != SASL_NOTDONE ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ERR,
+ "slap_sasl_authorize: getprop(REALM) failed.\n", 0, 0, 0 );
+#else
+ Debug(LDAP_DEBUG_TRACE,
+ "authorize: getprop(REALM) failed!\n", 0,0,0);
+#endif
+ *errstr = "Could not extract realm";
+ return SASL_NOAUTHZ;
+ }
+
+ /* Convert the identities to DN's. If no authzid was given, client will
+ be bound as the DN matching their username */
+ rc = slap_sasl_getdn( conn, NULL, (char *)authcid, 0, realm,
+ &authcDN, SLAP_GETDN_AUTHCID );
+ if( rc != LDAP_SUCCESS ) {
+ *errstr = ldap_err2string( rc );
+ return SASL_NOAUTHZ;
+ }
+ if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ENTRY,
+ "slap_sasl_authorize: conn %d Using authcDN=%s\n",
+ conn ? conn->c_connid : -1, authcDN.bv_val, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
+ "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
+#endif
+
+ conn->c_sasl_dn = authcDN;
+ goto ok;
+ }
+ rc = slap_sasl_getdn( conn, NULL, (char *)authzid, 0, realm,
+ &authzDN, SLAP_GETDN_AUTHZID );
+ if( rc != LDAP_SUCCESS ) {
+ ch_free( authcDN.bv_val );
+ *errstr = ldap_err2string( rc );
+ return SASL_NOAUTHZ;
+ }
+
+ rc = slap_sasl_authorized(conn->c_sasl_bindop, &authcDN, &authzDN );
+ ch_free( authcDN.bv_val );
+ if( rc ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, INFO,
+ "slap_sasl_authorize: conn %ld "
+ "proxy authorization disallowed (%d)\n",
+ (long)(conn ? conn->c_connid : -1), rc, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
+ "proxy authorization disallowed (%d)\n",
+ (long) (conn ? conn->c_connid : -1), rc, 0 );
+#endif
+
+ *errstr = "not authorized";
+ ch_free( authzDN.bv_val );
+ return SASL_NOAUTHZ;
+ }
+ conn->c_sasl_dn = authzDN;
+
+ok:
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, RESULTS,
+ "slap_sasl_authorize: conn %d proxy authorization allowed\n",
+ (long)(conn ? conn->c_connid : -1 ), 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
+ " authorization allowed\n",
+ (long) (conn ? conn->c_connid : -1), 0, 0 );
+#endif
+
+ if (conn->c_sasl_bindop) {
+ Statslog( LDAP_DEBUG_STATS,
+ "conn=%lu op=%lu BIND authcid=\"%s\"\n",
+ conn->c_connid, conn->c_sasl_bindop->o_opid,
+ authcid, 0, 0);
+ }
+
+ *errstr = NULL;
+ return SASL_OK;
+}
+#endif /* SASL_VERSION_MAJOR >= 2 */
+
+static int
+slap_sasl_err2ldap( int saslerr )
+{
+ int rc;
+
+ switch (saslerr) {
+ case SASL_OK:
+ rc = LDAP_SUCCESS;
+ break;
+ case SASL_CONTINUE:
+ rc = LDAP_SASL_BIND_IN_PROGRESS;
+ break;
+ case SASL_FAIL:
+ rc = LDAP_OTHER;
+ break;
+ case SASL_NOMEM:
+ rc = LDAP_OTHER;
+ break;
+ case SASL_NOMECH:
+ rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ break;
+ case SASL_BADAUTH:
+ rc = LDAP_INVALID_CREDENTIALS;
+ break;
+ case SASL_NOAUTHZ:
+ rc = LDAP_INSUFFICIENT_ACCESS;
+ break;
+ case SASL_TOOWEAK:
+ case SASL_ENCRYPT:
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ break;
+ default:
+ rc = LDAP_OTHER;
+ break;
+ }
+
+ return rc;
+}
+#endif
+
+int slap_sasl_init( void )
+{
+#ifdef HAVE_CYRUS_SASL
+ int rc;
+ static sasl_callback_t server_callbacks[] = {
+ { SASL_CB_LOG, &slap_sasl_log, NULL },
+ { SASL_CB_LIST_END, NULL, NULL }
+ };
+
+#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 );
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, INFO,
+ "slap_sasl_init: SASL library version mismatch:"
+ " expected " SASL_VERSION_STRING ","
+ " got %s\n", version, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "slap_sasl_init: SASL library version mismatch:"
+ " expected " SASL_VERSION_STRING ","
+ " got %s\n", version, 0, 0 );
+#endif
+ return -1;
+ }
+#endif
+
+ /* SASL 2 does its own memory management internally */
+#if SASL_VERSION_MAJOR < 2
+ sasl_set_alloc(
+ ber_memalloc,
+ ber_memcalloc,
+ ber_memrealloc,
+ ber_memfree );
+#endif
+
+ sasl_set_mutex(
+ ldap_pvt_sasl_mutex_new,
+ ldap_pvt_sasl_mutex_lock,
+ ldap_pvt_sasl_mutex_unlock,
+ ldap_pvt_sasl_mutex_dispose );
+
+#if SASL_VERSION_MAJOR >= 2
+ generic_filter.f_desc = slap_schema.si_ad_objectClass;
+
+ sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
+#endif
+ /* should provide callbacks for logging */
+ /* server name should be configurable */
+ rc = sasl_server_init( server_callbacks, "slapd" );
+
+ if( rc != SASL_OK ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: init failed.\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
+ 0, 0, 0 );
+#endif
+#if SASL_VERSION_MAJOR < 2
+ /* A no-op used to make sure we linked with Cyrus 1.5 */
+ sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
+#endif
+
+ return -1;
+ }
+
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: initialized!\n", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
+ 0, 0, 0 );
+#endif
+
+ /* 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( global_host );
+ global_host = NULL;
+
+ return 0;
+}
+
+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;
+
+#if SASL_VERSION_MAJOR >= 2
+ char *ipremoteport = NULL, *iplocalport = NULL;
+#endif
+
+ assert( conn->c_sasl_authctx == NULL );
+
+ if ( !reopen ) {
+ assert( conn->c_sasl_extra == NULL );
+
+ session_callbacks =
+#if SASL_VERSION_MAJOR >= 2
+ SLAP_CALLOC( 5, sizeof(sasl_callback_t));
+#else
+ SLAP_CALLOC( 3, sizeof(sasl_callback_t));
+#endif
+ if( session_callbacks == NULL ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG( TRANSPORT, ERR,
+ "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
+#endif
+ return -1;
+ }
+ conn->c_sasl_extra = session_callbacks;
+
+ session_callbacks[cb=0].id = SASL_CB_LOG;
+ session_callbacks[cb].proc = &slap_sasl_log;
+ session_callbacks[cb++].context = conn;
+
+ session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
+ session_callbacks[cb].proc = &slap_sasl_authorize;
+ session_callbacks[cb++].context = conn;
+
+#if SASL_VERSION_MAJOR >= 2
+ session_callbacks[cb].id = SASL_CB_CANON_USER;
+ session_callbacks[cb].proc = &slap_sasl_canonicalize;
+ session_callbacks[cb++].context = conn;
+
+ /* XXXX: this should be conditional */
+ session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
+ session_callbacks[cb].proc = &slap_sasl_checkpass;
+ session_callbacks[cb++].context = conn;
+#endif
+
+ 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;