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/*
* Copyright (C) 2018 ARPA2 project
*
* Author: Tom Vrancken (dev@tomvrancken.nl)
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
* This file provides common functionality for certificate type
* handling during TLS hello extensions.
*
*/
#ifndef GNUTLS_LIB_EXT_CERT_TYPES_H
#define GNUTLS_LIB_EXT_CERT_TYPES_H
/* Maps IANA TLS Certificate Types identifiers to internal
* certificate type representation.
*/
static inline gnutls_certificate_type_t IANA2cert_type(int num)
{
switch (num) {
case 0:
return GNUTLS_CRT_X509;
case 2:
return GNUTLS_CRT_RAWPK;
default:
return GNUTLS_CRT_UNKNOWN;
}
}
/* Maps internal certificate type representation to
* IANA TLS Certificate Types identifiers.
*/
static inline int cert_type2IANA(gnutls_certificate_type_t cert_type)
{
switch (cert_type) {
case GNUTLS_CRT_X509:
return 0;
case GNUTLS_CRT_RAWPK:
return 2;
default:
return GNUTLS_E_UNSUPPORTED_CERTIFICATE_TYPE;
}
}
/* Checks whether the given cert type is enabled in the application
*/
static inline bool is_cert_type_enabled(gnutls_session_t session,
gnutls_certificate_type_t cert_type)
{
switch (cert_type) {
case GNUTLS_CRT_X509:
// Default cert type, always enabled
return true;
case GNUTLS_CRT_RAWPK:
return session->internals.flags & GNUTLS_ENABLE_RAWPK;
default:
// When not explicitly supported here disable it
return false;
}
}
/* Checks whether alternative cert types (i.e. other than X.509)
* are enabled in the application
*/
static inline bool are_alternative_cert_types_allowed(gnutls_session_t session)
{
// OR-ed list of defined cert type init flags
#define CERT_TYPES_FLAGS GNUTLS_ENABLE_RAWPK
return session->internals.flags & CERT_TYPES_FLAGS;
#undef CERT_TYPES_FLAGS
}
#endif /* GNUTLS_LIB_EXT_CERT_TYPES_H */
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