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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* 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.
*/
/**
* @file parc_CryptoCache.h
* @ingroup security
* @brief In-memory cache of keys or certificates.
*
* Not sure how to differentiate between keys and certs at the moment. The current API
* is thus built around keys.
*
*/
#include <parc/security/parc_Key.h>
#ifndef libparc_parc_CryptoCache_h
#define libparc_parc_CryptoCache_h
struct parc_crypto_cache;
typedef struct parc_crypto_cache PARCCryptoCache;
PARCCryptoCache *parcCryptoCache_Create(void);
/**
* Destroys the cache and all internal buffers.
*
* @param [in,out] cryptoCachePtr A pointer to a pointer to a `PARCCryptoCache` instance.
*
* Example:
* @code
* <#example#>
* @endcode
*/
void parcCryptoCache_Destroy(PARCCryptoCache **cryptoCachePtr);
/**
* Adds the specified key to the keycache.
*
* Parameters must be non-null
* Returns true if added or false if keyid alredy existed and was a different than <code>key</code>
* This will store its own reference to the key, so the caller must free key.
*
* @param [in] cache A pointer to a PARCCryptoCache instance.
*
* Example:
* @code
* {
* PARCKey *key = ....;
* PARCCryptoCache *cache = parcCryptoCache_Create();
* parcCryptoCache_AddKey(cache, key);
* parcKey_release(&key);
* // do stuff with the crypto cache
* parcCryptoCache_Destroy(&cache);
* }
* @endcode
*/
bool parcCryptoCache_AddKey(PARCCryptoCache *cache, PARCKey *key);
/**
* Fetches the Key. The user must not modify or destroy the key.
*
* Returns NULL if the keyid is not found.
*
* @param [in] cache A pointer to a PARCCryptoCache instance.
* Example:
* @code
* <#example#>
* @endcode
*/
const PARCKey *parcCryptoCache_GetKey(PARCCryptoCache *cache, const PARCKeyId *keyid);
/**
* Removes the keyid and key. The internal buffers are destroyed.
*
* @param [in] cache A pointer to a PARCCryptoCache instance.
*
* Example:
* @code
* <#example#>
* @endcode
*/
void parcCryptoCache_RemoveKey(PARCCryptoCache *cache, const PARCKeyId *keyid);
#endif // libparc_parc_CryptoCache_h
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