EXTERNAL_HEADERS/corecrypto/cchmac.h

   1 /*
   2  *  cchmac.h
   3  *  corecrypto
   4  *
   5  *  Created by Michael Brouwer on 12/7/10.
   6  *  Copyright 2010,2011 Apple Inc. All rights reserved.
   7  *
   8  */
   9
  10 #ifndef _CORECRYPTO_CCHMAC_H_
  11 #define _CORECRYPTO_CCHMAC_H_
  12
  13 #include <corecrypto/cc.h>
  14 #include <corecrypto/ccdigest.h>
  15
  16 /* An hmac_ctx_t is normally allocated as an array of these. */
  17 struct cchmac_ctx {
  18     uint8_t b[8];
  19 } __attribute__((aligned(8)));
  20
  21 typedef union {
  22     struct cchmac_ctx *hdr;
  23     ccdigest_ctx_t digest;
  24 } cchmac_ctx_t __attribute__((transparent_union));
  25
  26 #define cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE)  (ccdigest_ctx_size(STATE_SIZE, BLOCK_SIZE) + (STATE_SIZE))
  27 #define cchmac_di_size(_di_)  (cchmac_ctx_size((_di_)->state_size, (_di_)->block_size))
  28
  29 #define cchmac_ctx_n(STATE_SIZE, BLOCK_SIZE)  ccn_nof_size(cchmac_ctx_size((STATE_SIZE), (BLOCK_SIZE)))
  30
  31 #define cchmac_ctx_decl(STATE_SIZE, BLOCK_SIZE, _name_) cc_ctx_decl(struct cchmac_ctx, cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE), _name_)
  32 #define cchmac_ctx_clear(STATE_SIZE, BLOCK_SIZE, _name_) cc_ctx_clear(struct cchmac_ctx, cchmac_ctx_size(STATE_SIZE, BLOCK_SIZE), _name_)
  33 #define cchmac_di_decl(_di_, _name_) cchmac_ctx_decl((_di_)->state_size, (_di_)->block_size, _name_)
  34 #define cchmac_di_clear(_di_, _name_) cchmac_ctx_clear((_di_)->state_size, (_di_)->block_size, _name_)
  35
  36 /* Return a ccdigest_ctx_t which can be accesed with the macros in ccdigest.h */
  37 #define cchmac_digest_ctx(_di_, HC)    (((cchmac_ctx_t)(HC)).digest)
  38
  39 /* Accesors for ostate fields, this is all cchmac_ctx_t adds to the ccdigest_ctx_t. */
  40 #define cchmac_ostate(_di_, HC)    ((struct ccdigest_state *)(((cchmac_ctx_t)(HC)).hdr->b + ccdigest_di_size(_di_)))
  41 #define cchmac_ostate8(_di_, HC)   (ccdigest_u8(cchmac_ostate(_di_, HC)))
  42 #define cchmac_ostate32(_di_, HC)  (ccdigest_u32(cchmac_ostate(_di_, HC)))
  43 #define cchmac_ostate64(_di_, HC)  (ccdigest_u64(cchmac_ostate(_di_, HC)))
  44 #define cchmac_ostateccn(_di_, HC) (ccdigest_ccn(cchmac_ostate(_di_, HC)))
  45
  46 /* Convenience accessors for ccdigest_ctx_t fields. */
  47 #define cchmac_istate(_di_, HC)    ((ccdigest_state_t)(((cchmac_ctx_t)(HC)).digest))
  48 #define cchmac_istate8(_di_, HC)   (ccdigest_u8(cchmac_istate(_di_, HC)))
  49 #define cchmac_istate32(_di_, HC)  (ccdigest_u32(cchmac_istate(_di_, HC)))
  50 #define cchmac_istate64(_di_, HC)  (ccdigest_u64(cchmac_istate(_di_, HC)))
  51 #define cchmac_istateccn(_di_, HC) (ccdigest_ccn(cchmac_istate(_di_, HC)))
  52 #define cchmac_data(_di_, HC)      ccdigest_data(_di_, ((cchmac_ctx_t)(HC)).digest)
  53 #define cchmac_num(_di_, HC)       ccdigest_num(_di_, ((cchmac_ctx_t)(HC)).digest)
  54 #define cchmac_nbits(_di_, HC)     ccdigest_nbits(_di_, ((cchmac_ctx_t)(HC)).digest)
  55
  56 void cchmac_init(const struct ccdigest_info *di, cchmac_ctx_t ctx,
  57                  unsigned long key_len, const void *key);
  58 void cchmac_update(const struct ccdigest_info *di, cchmac_ctx_t ctx,
  59                    unsigned long data_len, const void *data);
  60 void cchmac_final(const struct ccdigest_info *di, cchmac_ctx_t ctx,
  61                   unsigned char *mac);
  62
  63 void cchmac(const struct ccdigest_info *di, unsigned long key_len,
  64             const void *key, unsigned long data_len, const void *data,
  65             unsigned char *mac);
  66
  67 /* Test functions */
  68
  69 struct cchmac_test_input {
  70     const struct ccdigest_info *di;
  71     unsigned long key_len;
  72     const void *key;
  73     unsigned long data_len;
  74     const void *data;
  75     unsigned long mac_len;
  76     const void *expected_mac;
  77 };
  78
  79 int cchmac_test(const struct cchmac_test_input *input);
  80 int cchmac_test_chunks(const struct cchmac_test_input *input, unsigned long chunk_size);
  81
  82
  83 #endif /* _CORECRYPTO_CCHMAC_H_ */