mDNSCore/CryptoAlg.h

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2011 Apple Computer, Inc. All rights reserved.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17 #ifndef __CRYPTO_ALG_H
  18 #define __CRYPTO_ALG_H
  19
  20 typedef enum
  21 {
  22     CRYPTO_ALG,
  23     DIGEST_ALG,
  24     ENC_ALG,
  25 } AlgType;
  26
  27 typedef struct
  28 {
  29     void *context;
  30     AlgType type;
  31     mDNSu8 alg;
  32 } AlgContext;
  33
  34 typedef struct
  35 {
  36     mStatus (*Create)(AlgContext *ctx);
  37     mStatus (*Destroy)(AlgContext *ctx);
  38     mDNSu32 (*Length)(AlgContext *ctx);
  39     mStatus (*Add)(AlgContext *ctx, void *data, mDNSu32 len);
  40     // Verify the ctx using the key and compare it against signature/siglen
  41     mStatus (*Verify)(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen);
  42     // Encode the data and return the encoded data
  43     mDNSu8* (*Encode)(AlgContext *ctx);
  44 } AlgFuncs;
  45
  46 mDNSexport mStatus DigestAlgInit(mDNSu8 digestType, AlgFuncs *func);
  47 mDNSexport mStatus CryptoAlgInit(mDNSu8 algType, AlgFuncs *func);
  48 mDNSexport mStatus EncAlgInit(mDNSu8 algType, AlgFuncs *func);
  49
  50
  51 extern AlgContext *AlgCreate(AlgType type, mDNSu8 alg);
  52 extern mStatus AlgDestroy(AlgContext *ctx);
  53 extern mDNSu32 AlgLength(AlgContext *ctx);
  54 extern mStatus AlgAdd(AlgContext *ctx, void *data, mDNSu32 len);
  55 extern mStatus AlgVerify(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen);
  56 extern mDNSu8* AlgEncode(AlgContext *ctx);
  57
  58 #endif // __CRYPTO_ALG_H