1/*
2 * cchmac.h
3 * corecrypto
4 *
5 * Created on 12/07/2010
6 *
7 * Copyright (c) 2010,2011,2012,2014,2015 Apple Inc. All rights reserved.
8 *
9 */
10
11#ifndef _CORECRYPTO_CCHMAC_H_
12#define _CORECRYPTO_CCHMAC_H_
13
14#include <corecrypto/cc.h>
15#include <corecrypto/ccdigest.h>
16
17/* An hmac_ctx_t is normally allocated as an array of these. */
18struct cchmac_ctx {
19 uint8_t b[8];
20} CC_ALIGNED(8);
21
22typedef struct cchmac_ctx* cchmac_ctx_t;
23
24#define cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE) (ccdigest_ctx_size(STATE_SIZE, BLOCK_SIZE) + (STATE_SIZE))
25#define cchmac_di_size(_di_) (cchmac_ctx_size((_di_)->state_size, (_di_)->block_size))
26
27#define cchmac_ctx_n(STATE_SIZE, BLOCK_SIZE) ccn_nof_size(cchmac_ctx_size((STATE_SIZE), (BLOCK_SIZE)))
28
29#define cchmac_ctx_decl(STATE_SIZE, BLOCK_SIZE, _name_) cc_ctx_decl(struct cchmac_ctx, cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE), _name_)
30#define cchmac_ctx_clear(STATE_SIZE, BLOCK_SIZE, _name_) cc_clear(cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE), _name_)
31#define cchmac_di_decl(_di_, _name_) cchmac_ctx_decl((_di_)->state_size, (_di_)->block_size, _name_)
32#define cchmac_di_clear(_di_, _name_) cchmac_ctx_clear((_di_)->state_size, (_di_)->block_size, _name_)
33
34/* Return a ccdigest_ctx_t which can be accesed with the macros in ccdigest.h */
35#define cchmac_digest_ctx(_di_, HC) ((ccdigest_ctx_t)(HC))
36
37/* Accesors for ostate fields, this is all cchmac_ctx_t adds to the ccdigest_ctx_t. */
38#define cchmac_ostate(_di_, HC) ((struct ccdigest_state *)(((cchmac_ctx_t)(HC))->b + ccdigest_di_size(_di_)))
39#define cchmac_ostate8(_di_, HC) (ccdigest_u8(cchmac_ostate(_di_, HC)))
40#define cchmac_ostate32(_di_, HC) (ccdigest_u32(cchmac_ostate(_di_, HC)))
41#define cchmac_ostate64(_di_, HC) (ccdigest_u64(cchmac_ostate(_di_, HC)))
42#define cchmac_ostateccn(_di_, HC) (ccdigest_ccn(cchmac_ostate(_di_, HC)))
43
44/* Convenience accessors for ccdigest_ctx_t fields. */
45#define cchmac_istate(_di_, HC) ccdigest_state(_di_, ((ccdigest_ctx_t)(HC)))
46#define cchmac_istate8(_di_, HC) ccdigest_u8(cchmac_istate(_di_, HC))
47#define cchmac_istate32(_di_, HC) ccdigest_u32(cchmac_istate(_di_, HC))
48#define cchmac_istate64(_di_, HC) ccdigest_u64(cchmac_istate(_di_, HC))
49#define cchmac_istateccn(_di_, HC) ccdigest_ccn(cchmac_istate(_di_, HC))
50
51#define cchmac_data(_di_, HC) ccdigest_data(_di_, ((ccdigest_ctx_t)(HC)))
52#define cchmac_num(_di_, HC) ccdigest_num(_di_, ((ccdigest_ctx_t)(HC)))
53#define cchmac_nbits(_di_, HC) ccdigest_nbits(_di_, ((ccdigest_ctx_t)(HC)))
54
55void cchmac_init(const struct ccdigest_info *di, cchmac_ctx_t ctx,
56 size_t key_len, const void *key);
57void cchmac_update(const struct ccdigest_info *di, cchmac_ctx_t ctx,
58 size_t data_len, const void *data);
59void cchmac_final(const struct ccdigest_info *di, cchmac_ctx_t ctx,
60 unsigned char *mac);
61
62void cchmac(const struct ccdigest_info *di, size_t key_len,
63 const void *key, size_t data_len, const void *data,
64 unsigned char *mac);
65
66#endif /* _CORECRYPTO_CCHMAC_H_ */
67