232 lines
7.3 KiB
C
232 lines
7.3 KiB
C
/*
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* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <assert.h>
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#include <openssl/core_numbers.h>
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#include <openssl/core_names.h>
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#include <openssl/params.h>
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#include "internal/param_build.h"
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#include "crypto/ecx.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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static OSSL_OP_keymgmt_new_fn x25519_new_key;
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static OSSL_OP_keymgmt_new_fn x448_new_key;
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static OSSL_OP_keymgmt_get_params_fn x25519_get_params;
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static OSSL_OP_keymgmt_get_params_fn x448_get_params;
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static OSSL_OP_keymgmt_gettable_params_fn ecx_gettable_params;
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static OSSL_OP_keymgmt_has_fn ecx_has;
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static OSSL_OP_keymgmt_import_fn ecx_import;
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static OSSL_OP_keymgmt_import_types_fn ecx_imexport_types;
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static OSSL_OP_keymgmt_export_fn ecx_export;
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static OSSL_OP_keymgmt_export_types_fn ecx_imexport_types;
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static void *x25519_new_key(void *provctx)
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{
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return ecx_key_new(X25519_KEYLEN, 0);
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}
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static void *x448_new_key(void *provctx)
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{
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return ecx_key_new(X448_KEYLEN, 0);
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}
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static int ecx_has(void *keydata, int selection)
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{
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ECX_KEY *key = keydata;
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const int ecx_selections = OSSL_KEYMGMT_SELECT_PUBLIC_KEY
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| OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
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int ok = 1;
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if ((selection & ~ecx_selections) != 0
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|| (selection & ecx_selections) == 0)
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return 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && key->haspubkey;
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && key->privkey != NULL;
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return ok;
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}
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static int ecx_import(void *keydata, int selection, const OSSL_PARAM params[])
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{
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ECX_KEY *key = keydata;
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size_t privkeylen = 0, pubkeylen;
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const OSSL_PARAM *param_priv_key = NULL, *param_pub_key;
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unsigned char *pubkey;
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const int ecx_selections = OSSL_KEYMGMT_SELECT_PUBLIC_KEY
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| OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
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if (key == NULL)
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return 0;
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if ((selection & ~ecx_selections) != 0
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|| (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) == 0)
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return 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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param_priv_key =
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OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
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param_pub_key =
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OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
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/*
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* If a private key is present then a public key must also be present.
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* Alternatively we've just got a public key.
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*/
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if (param_pub_key == NULL
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|| (param_priv_key == NULL
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&& (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0))
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return 0;
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if (param_priv_key != NULL
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&& !OSSL_PARAM_get_octet_string(param_priv_key,
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(void **)&key->privkey, key->keylen,
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&privkeylen))
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return 0;
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pubkey = key->pubkey;
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if (!OSSL_PARAM_get_octet_string(param_pub_key,
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(void **)&pubkey,
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sizeof(key->pubkey), &pubkeylen))
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return 0;
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if (pubkeylen != key->keylen
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|| (param_priv_key != NULL && privkeylen != key->keylen))
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return 0;
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key->haspubkey = 1;
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return 1;
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}
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static int key_to_params(ECX_KEY *key, OSSL_PARAM_BLD *tmpl)
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{
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if (key == NULL)
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return 0;
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if (!ossl_param_bld_push_octet_string(tmpl, OSSL_PKEY_PARAM_PUB_KEY,
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key->pubkey, key->keylen))
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return 0;
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if (key->privkey != NULL
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&& !ossl_param_bld_push_octet_string(tmpl, OSSL_PKEY_PARAM_PRIV_KEY,
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key->privkey, key->keylen))
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return 0;
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return 1;
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}
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static int ecx_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
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void *cbarg)
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{
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ECX_KEY *key = keydata;
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OSSL_PARAM_BLD tmpl;
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OSSL_PARAM *params = NULL;
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int ret;
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if (key == NULL)
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return 0;
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0
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&& !key_to_params(key, &tmpl))
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return 0;
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ossl_param_bld_init(&tmpl);
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params = ossl_param_bld_to_param(&tmpl);
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if (params == NULL) {
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ossl_param_bld_free(params);
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return 0;
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}
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ret = param_cb(params, cbarg);
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ossl_param_bld_free(params);
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return ret;
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}
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static const OSSL_PARAM ecx_key_types[] = {
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0),
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *ecx_imexport_types(int selection)
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{
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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return ecx_key_types;
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return NULL;
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}
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static int ecx_get_params(OSSL_PARAM params[], int bits, int secbits,
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int size)
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{
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OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
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&& !OSSL_PARAM_set_int(p, bits))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
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&& !OSSL_PARAM_set_int(p, secbits))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
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&& !OSSL_PARAM_set_int(p, size))
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return 0;
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return 1;
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}
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static int x25519_get_params(void *key, OSSL_PARAM params[])
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{
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return ecx_get_params(params, X25519_BITS, X25519_SECURITY_BITS, X25519_KEYLEN);
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}
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static int x448_get_params(void *key, OSSL_PARAM params[])
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{
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return ecx_get_params(params, X448_BITS, X448_SECURITY_BITS, X448_KEYLEN);
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}
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static const OSSL_PARAM ecx_params[] = {
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OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
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OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
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OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *ecx_gettable_params(void)
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{
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return ecx_params;
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}
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const OSSL_DISPATCH x25519_keymgmt_functions[] = {
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{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))x25519_new_key },
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{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))ecx_key_free },
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{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))x25519_get_params },
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{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))ecx_gettable_params },
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{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))ecx_has },
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{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))ecx_import },
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{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))ecx_imexport_types },
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{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))ecx_export },
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{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))ecx_imexport_types },
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{ 0, NULL }
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};
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const OSSL_DISPATCH x448_keymgmt_functions[] = {
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{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))x448_new_key },
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{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))ecx_key_free },
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{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))x448_get_params },
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{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))ecx_gettable_params },
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{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))ecx_has },
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{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))ecx_import },
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{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))ecx_imexport_types },
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{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))ecx_export },
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{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))ecx_imexport_types },
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{ 0, NULL }
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};
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