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// $OpenLDAP$
/*
* Copyright 2010-2021 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include <fstream>
#include <sstream>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <cstring>
#include "TlsOptions.h"
#include "LDAPException.h"
enum opttype {
INT=0,
STRING,
OTHER
};
typedef struct tls_optmap {
int optval;
opttype type;
} tls_optmap_t;
static tls_optmap_t optmap[] = {
{ LDAP_OPT_X_TLS_CACERTFILE, STRING },
{ LDAP_OPT_X_TLS_CACERTDIR, STRING },
{ LDAP_OPT_X_TLS_CERTFILE, STRING },
{ LDAP_OPT_X_TLS_KEYFILE, STRING },
{ LDAP_OPT_X_TLS_REQUIRE_CERT, INT },
{ LDAP_OPT_X_TLS_PROTOCOL_MIN, INT },
{ LDAP_OPT_X_TLS_CIPHER_SUITE, STRING },
{ LDAP_OPT_X_TLS_RANDOM_FILE, STRING },
{ LDAP_OPT_X_TLS_CRLCHECK, INT },
{ LDAP_OPT_X_TLS_DHFILE, STRING },
{ LDAP_OPT_X_TLS_NEWCTX, INT }
};
#if 0 /* not implemented currently */
static const int TLS_CRLFILE /* GNUtls only */
static const int TLS_SSL_CTX /* OpenSSL SSL* */
static const int TLS_CONNECT_CB
static const int TLS_CONNECT_ARG
#endif
static void checkOpt( TlsOptions::tls_option opt, opttype type ) {
if ( opt < TlsOptions::CACERTFILE || opt >= TlsOptions::LASTOPT ){
throw( LDAPException( LDAP_PARAM_ERROR, "unknown Option" ) );
}
if ( optmap[opt].type != type ){
throw( LDAPException( LDAP_PARAM_ERROR, "not a string option" ) );
}
}
TlsOptions::TlsOptions() : m_ld(NULL) {}
TlsOptions::TlsOptions( LDAP* ld ): m_ld(ld) { }
void TlsOptions::setOption( tls_option opt, const std::string& value ) const {
checkOpt(opt, STRING);
switch(opt) {
case TlsOptions::CACERTFILE :
case TlsOptions::CERTFILE :
case TlsOptions::KEYFILE :
{
// check if the supplied file is actually readable
std::ifstream ifile(value.c_str());
if ( !ifile ) {
throw( LDAPException( LDAP_LOCAL_ERROR, "Unable to open the supplied file for reading" ) );
}
}
break;
case TlsOptions::CACERTDIR :
{
struct stat st;
std::ostringstream msg;
bool fail=false;
int err = stat(value.c_str(),&st);
if ( err ) {
msg << strerror(errno);
fail = true;
} else {
if ( !S_ISDIR(st.st_mode) ){
msg << "The supplied path is not a directory.";
fail = true;
}
}
if ( fail ) {
std::ostringstream errstr;
errstr << "Error while setting Certificate Directory (" << value << "): " << msg.str();
throw( LDAPException( LDAP_LOCAL_ERROR, errstr.str() ) );
}
}
break;
}
this->setOption( opt, value.empty() ? NULL : (void*) value.c_str() );
}
void TlsOptions::setOption( tls_option opt, int value ) const {
checkOpt(opt, INT);
this->setOption( opt, (void*) &value);
}
void TlsOptions::setOption( tls_option opt, void *value ) const {
int ret = ldap_set_option( m_ld, optmap[opt].optval, value);
if ( ret != LDAP_OPT_SUCCESS )
{
if ( ret != LDAP_OPT_ERROR ){
throw( LDAPException( ret ));
} else {
throw( LDAPException( LDAP_PARAM_ERROR, "error while setting TLS option" ) );
}
}
this->newCtx();
}
void TlsOptions::getOption( tls_option opt, void* value ) const {
int ret = ldap_get_option( m_ld, optmap[opt].optval, value);
if ( ret != LDAP_OPT_SUCCESS )
{
if ( ret != LDAP_OPT_ERROR ){
throw( LDAPException( ret ));
} else {
throw( LDAPException( LDAP_PARAM_ERROR, "error while reading TLS option" ) );
}
}
}
int TlsOptions::getIntOption( tls_option opt ) const {
int value;
checkOpt(opt, INT);
ldap_get_option( m_ld, optmap[opt].optval, (void*) &value);
return value;
}
std::string TlsOptions::getStringOption( tls_option opt ) const {
char *value;
checkOpt(opt, STRING);
ldap_get_option( m_ld, optmap[opt].optval, (void*) &value);
std::string strval;
if (value)
{
strval=std::string(value);
ldap_memfree(value);
}
return strval;
}
void TlsOptions::newCtx() const {
int val = 0;
int ret = ldap_set_option( m_ld, LDAP_OPT_X_TLS_NEWCTX, &val);
if ( ret != LDAP_OPT_SUCCESS )
{
if ( ret != LDAP_OPT_ERROR ){
throw( LDAPException( ret ));
} else {
throw( LDAPException( LDAP_LOCAL_ERROR, "error while renewing TLS context" ) );
}
}
}
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