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/*
* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/core_names.h>
#include <openssl/params.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include "crypto/ecx.h"
#include "ecx_backend.h"
/*
* The intention with the "backend" source file is to offer backend support
* for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
* implementations alike.
*/
int ecx_public_from_private(ECX_KEY *key)
{
switch (key->type) {
case ECX_KEY_TYPE_X25519:
X25519_public_from_private(key->pubkey, key->privkey);
break;
case ECX_KEY_TYPE_ED25519:
if (!ED25519_public_from_private(key->libctx, key->pubkey, key->privkey,
key->propq)) {
ERR_raise(ERR_LIB_EC, EC_R_FAILED_MAKING_PUBLIC_KEY);
return 0;
}
break;
case ECX_KEY_TYPE_X448:
X448_public_from_private(key->pubkey, key->privkey);
break;
case ECX_KEY_TYPE_ED448:
if (!ED448_public_from_private(key->libctx, key->pubkey, key->privkey,
key->propq)) {
ERR_raise(ERR_LIB_EC, EC_R_FAILED_MAKING_PUBLIC_KEY);
return 0;
}
break;
}
return 1;
}
int ecx_key_fromdata(ECX_KEY *ecx, const OSSL_PARAM params[],
int include_private)
{
size_t privkeylen = 0, pubkeylen = 0;
const OSSL_PARAM *param_priv_key = NULL, *param_pub_key;
unsigned char *pubkey;
if (ecx == NULL)
return 0;
param_pub_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
if (include_private)
param_priv_key =
OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
if (param_pub_key == NULL && param_priv_key == NULL)
return 0;
if (param_priv_key != NULL
&& !OSSL_PARAM_get_octet_string(param_priv_key,
(void **)&ecx->privkey, ecx->keylen,
&privkeylen))
return 0;
pubkey = ecx->pubkey;
if (param_pub_key != NULL
&& !OSSL_PARAM_get_octet_string(param_pub_key,
(void **)&pubkey,
sizeof(ecx->pubkey), &pubkeylen))
return 0;
if ((param_pub_key != NULL && pubkeylen != ecx->keylen)
|| (param_priv_key != NULL && privkeylen != ecx->keylen))
return 0;
if (param_pub_key == NULL && !ecx_public_from_private(ecx))
return 0;
ecx->haspubkey = 1;
return 1;
}
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