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, const 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 // Return the finalized data in data whose length is len (used by hash algorithms) 45 mStatus (*Final)(AlgContext *ctx, void *data, mDNSu32 len); 46 } AlgFuncs; 47 48 mDNSexport mStatus DigestAlgInit(mDNSu8 digestType, AlgFuncs *func); 49 mDNSexport mStatus CryptoAlgInit(mDNSu8 algType, AlgFuncs *func); 50 mDNSexport mStatus EncAlgInit(mDNSu8 algType, AlgFuncs *func); 51 52 53 extern AlgContext *AlgCreate(AlgType type, mDNSu8 alg); 54 extern mStatus AlgDestroy(AlgContext *ctx); 55 extern mDNSu32 AlgLength(AlgContext *ctx); 56 extern mStatus AlgAdd(AlgContext *ctx, const void *data, mDNSu32 len); 57 extern mStatus AlgVerify(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen); 58 extern mDNSu8* AlgEncode(AlgContext *ctx); 59 extern mStatus AlgFinal(AlgContext *ctx, void *data, mDNSu32 len); 60 61 #endif // __CRYPTO_ALG_H 62