1/* -*- Mode: C; tab-width: 4 -*- 2 * 3 * Copyright (c) 2011-2012 Apple 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 18#ifndef __CRYPTO_ALG_H 19#define __CRYPTO_ALG_H 20 21typedef enum 22{ 23 CRYPTO_ALG, 24 DIGEST_ALG, 25 ENC_ALG, 26} AlgType; 27 28typedef struct 29{ 30 void *context; 31 AlgType type; 32 mDNSu8 alg; 33} AlgContext; 34 35typedef struct 36{ 37 mStatus (*Create)(AlgContext *ctx); 38 mStatus (*Destroy)(AlgContext *ctx); 39 mDNSu32 (*Length)(AlgContext *ctx); 40 mStatus (*Add)(AlgContext *ctx, const void *data, mDNSu32 len); 41 // Verify the ctx using the key and compare it against signature/siglen 42 mStatus (*Verify)(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen); 43 // Encode the data and return the encoded data 44 mDNSu8* (*Encode)(AlgContext *ctx); 45 // Return the finalized data in data whose length is len (used by hash algorithms) 46 mStatus (*Final)(AlgContext *ctx, void *data, mDNSu32 len); 47} AlgFuncs; 48 49mDNSexport mStatus DigestAlgInit(mDNSu8 digestType, AlgFuncs *func); 50mDNSexport mStatus CryptoAlgInit(mDNSu8 algType, AlgFuncs *func); 51mDNSexport mStatus EncAlgInit(mDNSu8 algType, AlgFuncs *func); 52 53 54extern AlgContext *AlgCreate(AlgType type, mDNSu8 alg); 55extern mStatus AlgDestroy(AlgContext *ctx); 56extern mDNSu32 AlgLength(AlgContext *ctx); 57extern mStatus AlgAdd(AlgContext *ctx, const void *data, mDNSu32 len); 58extern mStatus AlgVerify(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen); 59extern mDNSu8* AlgEncode(AlgContext *ctx); 60extern mStatus AlgFinal(AlgContext *ctx, void *data, mDNSu32 len); 61 62#endif // __CRYPTO_ALG_H 63