diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/3rdparty/everest/library/x25519.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/3rdparty/everest/library/x25519.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/lib/mbedtls-2.27.0/3rdparty/everest/library/x25519.c b/lib/mbedtls-2.27.0/3rdparty/everest/library/x25519.c deleted file mode 100644 index 9faa9ab..0000000 --- a/lib/mbedtls-2.27.0/3rdparty/everest/library/x25519.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * ECDH with curve-optimized implementation multiplexing - * - * 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" - -#if defined(MBEDTLS_ECDH_C) && defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED) - -#include <mbedtls/ecdh.h> - -#if !(defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) -#define KRML_VERIFIED_UINT128 -#endif - -#include <Hacl_Curve25519.h> -#include <mbedtls/platform_util.h> - -#include "x25519.h" - -#include <string.h> - -/* - * Initialize context - */ -void mbedtls_x25519_init( mbedtls_x25519_context *ctx ) -{ - mbedtls_platform_zeroize( ctx, sizeof( mbedtls_x25519_context ) ); -} - -/* - * Free context - */ -void mbedtls_x25519_free( mbedtls_x25519_context *ctx ) -{ - if( ctx == NULL ) - return; - - mbedtls_platform_zeroize( ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ); - mbedtls_platform_zeroize( ctx->peer_point, MBEDTLS_X25519_KEY_SIZE_BYTES ); -} - -int mbedtls_x25519_make_params( mbedtls_x25519_context *ctx, size_t *olen, - unsigned char *buf, size_t blen, - int( *f_rng )(void *, unsigned char *, size_t), - void *p_rng ) -{ - int ret = 0; - - uint8_t base[MBEDTLS_X25519_KEY_SIZE_BYTES] = {0}; - - if( ( ret = f_rng( p_rng, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ) ) != 0 ) - return ret; - - *olen = MBEDTLS_X25519_KEY_SIZE_BYTES + 4; - if( blen < *olen ) - return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL ); - - *buf++ = MBEDTLS_ECP_TLS_NAMED_CURVE; - *buf++ = MBEDTLS_ECP_TLS_CURVE25519 >> 8; - *buf++ = MBEDTLS_ECP_TLS_CURVE25519 & 0xFF; - *buf++ = MBEDTLS_X25519_KEY_SIZE_BYTES; - - base[0] = 9; - Hacl_Curve25519_crypto_scalarmult( buf, ctx->our_secret, base ); - - base[0] = 0; - if( memcmp( buf, base, MBEDTLS_X25519_KEY_SIZE_BYTES) == 0 ) - return MBEDTLS_ERR_ECP_RANDOM_FAILED; - - return( 0 ); -} - -int mbedtls_x25519_read_params( mbedtls_x25519_context *ctx, - const unsigned char **buf, const unsigned char *end ) -{ - if( end - *buf < MBEDTLS_X25519_KEY_SIZE_BYTES + 1 ) - return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA ); - - if( ( *(*buf)++ != MBEDTLS_X25519_KEY_SIZE_BYTES ) ) - return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA ); - - memcpy( ctx->peer_point, *buf, MBEDTLS_X25519_KEY_SIZE_BYTES ); - *buf += MBEDTLS_X25519_KEY_SIZE_BYTES; - return( 0 ); -} - -int mbedtls_x25519_get_params( mbedtls_x25519_context *ctx, const mbedtls_ecp_keypair *key, - mbedtls_x25519_ecdh_side side ) -{ - size_t olen = 0; - - switch( side ) { - case MBEDTLS_X25519_ECDH_THEIRS: - return mbedtls_ecp_point_write_binary( &key->grp, &key->Q, MBEDTLS_ECP_PF_COMPRESSED, &olen, ctx->peer_point, MBEDTLS_X25519_KEY_SIZE_BYTES ); - case MBEDTLS_X25519_ECDH_OURS: - return mbedtls_mpi_write_binary_le( &key->d, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ); - default: - return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA ); - } -} - -int mbedtls_x25519_calc_secret( mbedtls_x25519_context *ctx, size_t *olen, - unsigned char *buf, size_t blen, - int( *f_rng )(void *, unsigned char *, size_t), - void *p_rng ) -{ - /* f_rng and p_rng are not used here because this implementation does not - need blinding since it has constant trace. */ - (( void )f_rng); - (( void )p_rng); - - *olen = MBEDTLS_X25519_KEY_SIZE_BYTES; - - if( blen < *olen ) - return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL ); - - Hacl_Curve25519_crypto_scalarmult( buf, ctx->our_secret, ctx->peer_point); - - /* Wipe the DH secret and don't let the peer chose a small subgroup point */ - mbedtls_platform_zeroize( ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ); - - if( memcmp( buf, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES) == 0 ) - return MBEDTLS_ERR_ECP_RANDOM_FAILED; - - return( 0 ); -} - -int mbedtls_x25519_make_public( mbedtls_x25519_context *ctx, size_t *olen, - unsigned char *buf, size_t blen, - int( *f_rng )(void *, unsigned char *, size_t), - void *p_rng ) -{ - int ret = 0; - unsigned char base[MBEDTLS_X25519_KEY_SIZE_BYTES] = { 0 }; - - if( ctx == NULL ) - return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA ); - - if( ( ret = f_rng( p_rng, ctx->our_secret, MBEDTLS_X25519_KEY_SIZE_BYTES ) ) != 0 ) - return ret; - - *olen = MBEDTLS_X25519_KEY_SIZE_BYTES + 1; - if( blen < *olen ) - return(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL); - *buf++ = MBEDTLS_X25519_KEY_SIZE_BYTES; - - base[0] = 9; - Hacl_Curve25519_crypto_scalarmult( buf, ctx->our_secret, base ); - - base[0] = 0; - if( memcmp( buf, base, MBEDTLS_X25519_KEY_SIZE_BYTES ) == 0 ) - return MBEDTLS_ERR_ECP_RANDOM_FAILED; - - return( ret ); -} - -int mbedtls_x25519_read_public( mbedtls_x25519_context *ctx, - const unsigned char *buf, size_t blen ) -{ - if( blen < MBEDTLS_X25519_KEY_SIZE_BYTES + 1 ) - return(MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL); - if( (*buf++ != MBEDTLS_X25519_KEY_SIZE_BYTES) ) - return(MBEDTLS_ERR_ECP_BAD_INPUT_DATA); - memcpy( ctx->peer_point, buf, MBEDTLS_X25519_KEY_SIZE_BYTES ); - return( 0 ); -} - - -#endif /* MBEDTLS_ECDH_C && MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED */ |