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/* -*- Mode: C; tab-width: 4 -*-
*
* Copyright (c) 2011-2012 Apple Inc. All rights reserved.
*
* 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.
*/
#ifndef __CRYPTO_ALG_H
#define __CRYPTO_ALG_H
typedef enum
{
CRYPTO_ALG,
DIGEST_ALG,
ENC_ALG,
} AlgType;
typedef struct
{
void *context;
AlgType type;
mDNSu8 alg;
} AlgContext;
typedef struct
{
mStatus (*Create)(AlgContext *ctx);
mStatus (*Destroy)(AlgContext *ctx);
mDNSu32 (*Length)(AlgContext *ctx);
mStatus (*Add)(AlgContext *ctx, const void *data, mDNSu32 len);
// Verify the ctx using the key and compare it against signature/siglen
mStatus (*Verify)(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen);
// Encode the data and return the encoded data
mDNSu8* (*Encode)(AlgContext *ctx);
// Return the finalized data in data whose length is len (used by hash algorithms)
mStatus (*Final)(AlgContext *ctx, void *data, mDNSu32 len);
} AlgFuncs;
mDNSexport mStatus DigestAlgInit(mDNSu8 digestType, AlgFuncs *func);
mDNSexport mStatus CryptoAlgInit(mDNSu8 algType, AlgFuncs *func);
mDNSexport mStatus EncAlgInit(mDNSu8 algType, AlgFuncs *func);
extern AlgContext *AlgCreate(AlgType type, mDNSu8 alg);
extern mStatus AlgDestroy(AlgContext *ctx);
extern mDNSu32 AlgLength(AlgContext *ctx);
extern mStatus AlgAdd(AlgContext *ctx, const void *data, mDNSu32 len);
extern mStatus AlgVerify(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen);
extern mDNSu8* AlgEncode(AlgContext *ctx);
extern mStatus AlgFinal(AlgContext *ctx, void *data, mDNSu32 len);
#endif // __CRYPTO_ALG_H
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