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/*
* Interface to code from Project Everest
*
* Copyright 2016-2018 INRIA and Microsoft Corporation
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file is part of Mbed TLS (https://tls.mbed.org).
*/
#include "common.h"
#include <string.h>
#include "mbedtls/ecdh.h"
#include "everest/x25519.h"
#include "everest/everest.h"
#include "mbedtls/platform.h"
#if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
int mbedtls_everest_setup( mbedtls_ecdh_context_everest *ctx, int grp_id )
{
if( grp_id != MBEDTLS_ECP_DP_CURVE25519 )
return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
mbedtls_x25519_init( &ctx->ctx );
return 0;
}
void mbedtls_everest_free( mbedtls_ecdh_context_everest *ctx )
{
mbedtls_x25519_free( &ctx->ctx );
}
int mbedtls_everest_make_params( mbedtls_ecdh_context_everest *ctx, size_t *olen,
unsigned char *buf, size_t blen,
int( *f_rng )( void *, unsigned char *, size_t ),
void *p_rng )
{
mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
return mbedtls_x25519_make_params( x25519_ctx, olen, buf, blen, f_rng, p_rng );
}
int mbedtls_everest_read_params( mbedtls_ecdh_context_everest *ctx,
const unsigned char **buf,
const unsigned char *end )
{
mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
return mbedtls_x25519_read_params( x25519_ctx, buf, end );
}
int mbedtls_everest_get_params( mbedtls_ecdh_context_everest *ctx,
const mbedtls_ecp_keypair *key,
mbedtls_everest_ecdh_side side )
{
mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
mbedtls_x25519_ecdh_side s = side == MBEDTLS_EVEREST_ECDH_OURS ?
MBEDTLS_X25519_ECDH_OURS :
MBEDTLS_X25519_ECDH_THEIRS;
return mbedtls_x25519_get_params( x25519_ctx, key, s );
}
int mbedtls_everest_make_public( mbedtls_ecdh_context_everest *ctx, size_t *olen,
unsigned char *buf, size_t blen,
int( *f_rng )( void *, unsigned char *, size_t ),
void *p_rng )
{
mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
return mbedtls_x25519_make_public( x25519_ctx, olen, buf, blen, f_rng, p_rng );
}
int mbedtls_everest_read_public( mbedtls_ecdh_context_everest *ctx,
const unsigned char *buf, size_t blen )
{
mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
return mbedtls_x25519_read_public ( x25519_ctx, buf, blen );
}
int mbedtls_everest_calc_secret( mbedtls_ecdh_context_everest *ctx, size_t *olen,
unsigned char *buf, size_t blen,
int( *f_rng )( void *, unsigned char *, size_t ),
void *p_rng )
{
mbedtls_x25519_context *x25519_ctx = &ctx->ctx;
return mbedtls_x25519_calc_secret( x25519_ctx, olen, buf, blen, f_rng, p_rng );
}
#endif /* MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED */
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