108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/*
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* Interface to code from Project Everest
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*
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* Copyright 2016-2018 INRIA and Microsoft Corporation
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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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* This file is part of Mbed TLS (https://tls.mbed.org).
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*/
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#include "common.h"
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#include <string.h>
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#include "mbedtls/ecdh.h"
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#include "everest/x25519.h"
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#include "everest/everest.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif
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#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
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int mbedtls_everest_setup( mbedtls_ecdh_context_everest *ctx, int grp_id )
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{
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if( grp_id != MBEDTLS_ECP_DP_CURVE25519 )
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return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
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mbedtls_x25519_init( &ctx->ctx );
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return 0;
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}
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void mbedtls_everest_free( mbedtls_ecdh_context_everest *ctx )
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{
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mbedtls_x25519_free( &ctx->ctx );
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}
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int mbedtls_everest_make_params( mbedtls_ecdh_context_everest *ctx, size_t *olen,
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unsigned char *buf, size_t blen,
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int( *f_rng )( void *, unsigned char *, size_t ),
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void *p_rng )
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{
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mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
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return mbedtls_x25519_make_params( x25519_ctx, olen, buf, blen, f_rng, p_rng );
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}
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int mbedtls_everest_read_params( mbedtls_ecdh_context_everest *ctx,
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const unsigned char **buf,
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const unsigned char *end )
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{
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mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
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return mbedtls_x25519_read_params( x25519_ctx, buf, end );
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}
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int mbedtls_everest_get_params( mbedtls_ecdh_context_everest *ctx,
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const mbedtls_ecp_keypair *key,
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mbedtls_everest_ecdh_side side )
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{
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mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
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mbedtls_x25519_ecdh_side s = side == MBEDTLS_EVEREST_ECDH_OURS ?
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MBEDTLS_X25519_ECDH_OURS :
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MBEDTLS_X25519_ECDH_THEIRS;
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return mbedtls_x25519_get_params( x25519_ctx, key, s );
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}
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int mbedtls_everest_make_public( mbedtls_ecdh_context_everest *ctx, size_t *olen,
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unsigned char *buf, size_t blen,
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int( *f_rng )( void *, unsigned char *, size_t ),
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void *p_rng )
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{
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mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
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return mbedtls_x25519_make_public( x25519_ctx, olen, buf, blen, f_rng, p_rng );
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}
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int mbedtls_everest_read_public( mbedtls_ecdh_context_everest *ctx,
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const unsigned char *buf, size_t blen )
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{
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mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
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return mbedtls_x25519_read_public ( x25519_ctx, buf, blen );
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}
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int mbedtls_everest_calc_secret( mbedtls_ecdh_context_everest *ctx, size_t *olen,
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unsigned char *buf, size_t blen,
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int( *f_rng )( void *, unsigned char *, size_t ),
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void *p_rng )
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{
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mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
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return mbedtls_x25519_calc_secret( x25519_ctx, olen, buf, blen, f_rng, p_rng );
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}
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#endif /* MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED */
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