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/*
* Copyright 2019 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/crypto.h>
#include <openssl/core_numbers.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include "internal/provider.h"
#include "internal/refcount.h"
#include "crypto/evp.h"
#include "evp_local.h"
static void *keymgmt_new(void)
{
EVP_KEYMGMT *keymgmt = NULL;
if ((keymgmt = OPENSSL_zalloc(sizeof(*keymgmt))) == NULL
|| (keymgmt->lock = CRYPTO_THREAD_lock_new()) == NULL) {
EVP_KEYMGMT_free(keymgmt);
EVPerr(0, ERR_R_MALLOC_FAILURE);
return NULL;
}
keymgmt->refcnt = 1;
return keymgmt;
}
static void *keymgmt_from_dispatch(int name_id,
const OSSL_DISPATCH *fns,
OSSL_PROVIDER *prov,
void *unused)
{
EVP_KEYMGMT *keymgmt = NULL;
if ((keymgmt = keymgmt_new()) == NULL) {
EVP_KEYMGMT_free(keymgmt);
return NULL;
}
keymgmt->name_id = name_id;
for (; fns->function_id != 0; fns++) {
switch (fns->function_id) {
case OSSL_FUNC_KEYMGMT_IMPORTDOMPARAMS:
if (keymgmt->importdomparams != NULL)
break;
keymgmt->importdomparams =
OSSL_get_OP_keymgmt_importdomparams(fns);
break;
case OSSL_FUNC_KEYMGMT_GENDOMPARAMS:
if (keymgmt->gendomparams != NULL)
break;
keymgmt->gendomparams = OSSL_get_OP_keymgmt_gendomparams(fns);
break;
case OSSL_FUNC_KEYMGMT_FREEDOMPARAMS:
if (keymgmt->freedomparams != NULL)
break;
keymgmt->freedomparams = OSSL_get_OP_keymgmt_freedomparams(fns);
break;
case OSSL_FUNC_KEYMGMT_EXPORTDOMPARAMS:
if (keymgmt->exportdomparams != NULL)
break;
keymgmt->exportdomparams =
OSSL_get_OP_keymgmt_exportdomparams(fns);
break;
case OSSL_FUNC_KEYMGMT_IMPORTDOMPARAM_TYPES:
if (keymgmt->importdomparam_types != NULL)
break;
keymgmt->importdomparam_types =
OSSL_get_OP_keymgmt_importdomparam_types(fns);
break;
case OSSL_FUNC_KEYMGMT_EXPORTDOMPARAM_TYPES:
if (keymgmt->exportdomparam_types != NULL)
break;
keymgmt->exportdomparam_types =
OSSL_get_OP_keymgmt_exportdomparam_types(fns);
break;
case OSSL_FUNC_KEYMGMT_IMPORTKEY:
if (keymgmt->importkey != NULL)
break;
keymgmt->importkey = OSSL_get_OP_keymgmt_importkey(fns);
break;
case OSSL_FUNC_KEYMGMT_GENKEY:
if (keymgmt->genkey != NULL)
break;
keymgmt->genkey = OSSL_get_OP_keymgmt_genkey(fns);
break;
case OSSL_FUNC_KEYMGMT_LOADKEY:
if (keymgmt->loadkey != NULL)
break;
keymgmt->loadkey = OSSL_get_OP_keymgmt_loadkey(fns);
break;
case OSSL_FUNC_KEYMGMT_FREEKEY:
if (keymgmt->freekey != NULL)
break;
keymgmt->freekey = OSSL_get_OP_keymgmt_freekey(fns);
break;
case OSSL_FUNC_KEYMGMT_EXPORTKEY:
if (keymgmt->exportkey != NULL)
break;
keymgmt->exportkey = OSSL_get_OP_keymgmt_exportkey(fns);
break;
case OSSL_FUNC_KEYMGMT_IMPORTKEY_TYPES:
if (keymgmt->importkey_types != NULL)
break;
keymgmt->importkey_types =
OSSL_get_OP_keymgmt_importkey_types(fns);
break;
case OSSL_FUNC_KEYMGMT_EXPORTKEY_TYPES:
if (keymgmt->exportkey_types != NULL)
break;
keymgmt->exportkey_types =
OSSL_get_OP_keymgmt_exportkey_types(fns);
break;
}
}
/*
* Try to check that the method is sensible.
* It makes no sense being able to free stuff if you can't create it.
* It makes no sense providing OSSL_PARAM descriptors for import and
* export if you can't import or export.
*/
if ((keymgmt->freedomparams != NULL
&& (keymgmt->importdomparams == NULL
&& keymgmt->gendomparams == NULL))
|| (keymgmt->freekey != NULL
&& (keymgmt->importkey == NULL
&& keymgmt->genkey == NULL
&& keymgmt->loadkey == NULL))
|| (keymgmt->importdomparam_types != NULL
&& keymgmt->importdomparams == NULL)
|| (keymgmt->exportdomparam_types != NULL
&& keymgmt->exportdomparams == NULL)
|| (keymgmt->importkey_types != NULL
&& keymgmt->importkey == NULL)
|| (keymgmt->exportkey_types != NULL
&& keymgmt->exportkey == NULL)) {
EVP_KEYMGMT_free(keymgmt);
EVPerr(0, EVP_R_INVALID_PROVIDER_FUNCTIONS);
return NULL;
}
keymgmt->prov = prov;
if (prov != NULL)
ossl_provider_up_ref(prov);
return keymgmt;
}
EVP_KEYMGMT *evp_keymgmt_fetch_by_number(OPENSSL_CTX *ctx, int name_id,
const char *properties)
{
return evp_generic_fetch_by_number(ctx,
OSSL_OP_KEYMGMT, name_id, properties,
keymgmt_from_dispatch, NULL,
(int (*)(void *))EVP_KEYMGMT_up_ref,
(void (*)(void *))EVP_KEYMGMT_free);
}
EVP_KEYMGMT *EVP_KEYMGMT_fetch(OPENSSL_CTX *ctx, const char *algorithm,
const char *properties)
{
return evp_generic_fetch(ctx, OSSL_OP_KEYMGMT, algorithm, properties,
keymgmt_from_dispatch, NULL,
(int (*)(void *))EVP_KEYMGMT_up_ref,
(void (*)(void *))EVP_KEYMGMT_free);
}
int EVP_KEYMGMT_up_ref(EVP_KEYMGMT *keymgmt)
{
int ref = 0;
CRYPTO_UP_REF(&keymgmt->refcnt, &ref, keymgmt->lock);
return 1;
}
void EVP_KEYMGMT_free(EVP_KEYMGMT *keymgmt)
{
int ref = 0;
if (keymgmt == NULL)
return;
CRYPTO_DOWN_REF(&keymgmt->refcnt, &ref, keymgmt->lock);
if (ref > 0)
return;
ossl_provider_free(keymgmt->prov);
CRYPTO_THREAD_lock_free(keymgmt->lock);
OPENSSL_free(keymgmt);
}
const OSSL_PROVIDER *EVP_KEYMGMT_provider(const EVP_KEYMGMT *keymgmt)
{
return keymgmt->prov;
}
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