229bf1031f
mbedtls_pk_ec() is not an ideal function because: - it provides direct access to the ecp_keypair structure wrapped by the pk_context and - this bypasses the PK module's control However, since for backward compatibility, it cannot be deprecated immediately, 2 alternative internal functions are proposed. As a consequence: - when ECP_C is defined, then the legacy mbedtls_pk_ec is available - when only ECP_LIGHT is defined, but ECP_C is not, then only the new internal functions will be available Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/**
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* \file pk_internal.h
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*
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* \brief Public Key abstraction layer: internal (i.e. library only) functions
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* and definitions.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBEDTLS_PK_INTERNAL_H
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#define MBEDTLS_PK_INTERNAL_H
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#if defined(MBEDTLS_ECP_LIGHT)
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#include "mbedtls/ecp.h"
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#endif
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#if defined(MBEDTLS_ECP_LIGHT)
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/**
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* Public function mbedtls_pk_ec() can be used to get direct access to the
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* wrapped ecp_keypair strucure pointed to the pk_ctx. However this is not
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* ideal because it bypasses the PK module on the control of its internal's
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* structure (pk_context) fields.
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* For backward compatibility we keep mbedtls_pk_ec() when ECP_C is defined, but
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* we provide 2 very similar function when only ECP_LIGHT is enabled and not
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* ECP_C.
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* These variants embed the "ro" or "rw" keywords in their name to make the
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* usage of the returned pointer explicit. Of course the returned value is
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* const or non-const accordingly.
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*/
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static inline const mbedtls_ecp_keypair *mbedtls_pk_ec_ro(const mbedtls_pk_context pk)
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{
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switch (mbedtls_pk_get_type(&pk)) {
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case MBEDTLS_PK_ECKEY:
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case MBEDTLS_PK_ECKEY_DH:
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case MBEDTLS_PK_ECDSA:
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return (mbedtls_ecp_keypair *) (pk).MBEDTLS_PRIVATE(pk_ctx);
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default:
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return NULL;
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}
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}
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static inline mbedtls_ecp_keypair *mbedtls_pk_ec_rw(const mbedtls_pk_context pk)
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{
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switch (mbedtls_pk_get_type(&pk)) {
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case MBEDTLS_PK_ECKEY:
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case MBEDTLS_PK_ECKEY_DH:
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case MBEDTLS_PK_ECDSA:
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return (mbedtls_ecp_keypair *) (pk).MBEDTLS_PRIVATE(pk_ctx);
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default:
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return NULL;
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}
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}
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#endif /* MBEDTLS_ECP_LIGHT */
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#endif /* MBEDTLS_PK_INTERNAL_H */
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