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
20typedef enum
21{
22    CRYPTO_ALG,
23    DIGEST_ALG,
24    ENC_ALG,
25} AlgType;
26
27typedef struct
28{
29    void *context;
30    AlgType type;
31    mDNSu8 alg;
32} AlgContext;
33
34typedef 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
48mDNSexport mStatus DigestAlgInit(mDNSu8 digestType, AlgFuncs *func);
49mDNSexport mStatus CryptoAlgInit(mDNSu8 algType, AlgFuncs *func);
50mDNSexport mStatus EncAlgInit(mDNSu8 algType, AlgFuncs *func);
51
52
53extern AlgContext *AlgCreate(AlgType type, mDNSu8 alg);
54extern mStatus AlgDestroy(AlgContext *ctx);
55extern mDNSu32 AlgLength(AlgContext *ctx);
56extern mStatus AlgAdd(AlgContext *ctx, const void *data, mDNSu32 len);
57extern mStatus AlgVerify(AlgContext *ctx, mDNSu8 *key, mDNSu32 keylen, mDNSu8 *signature, mDNSu32 siglen);
58extern mDNSu8* AlgEncode(AlgContext *ctx);
59extern mStatus AlgFinal(AlgContext *ctx, void *data, mDNSu32 len);
60
61#endif // __CRYPTO_ALG_H
62