EXTERNAL_HEADERS/corecrypto/cchmac.h

   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. */
  18 struct cchmac_ctx {
  19     uint8_t b[1];
  20 } CC_ALIGNED(8);
  21
  22 typedef struct cchmac_ctx* cchmac_ctx_t;
  23
  24 #define cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE) (cc_pad_align(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 + cc_pad_align(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
  55 void cchmac_init(const struct ccdigest_info *di, cchmac_ctx_t ctx,
  56                  size_t key_len, const void *key);
  57 void cchmac_update(const struct ccdigest_info *di, cchmac_ctx_t ctx,
  58                    size_t data_len, const void *data);
  59 void cchmac_final(const struct ccdigest_info *di, cchmac_ctx_t ctx,
  60                   unsigned char *mac);
  61
  62 void 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_ */