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. */ 17struct cchmac_ctx { 18 uint8_t b[8]; 19} __attribute__((aligned(8))); 20 21typedef 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 56void cchmac_init(const struct ccdigest_info *di, cchmac_ctx_t ctx, 57 unsigned long key_len, const void *key); 58void cchmac_update(const struct ccdigest_info *di, cchmac_ctx_t ctx, 59 unsigned long data_len, const void *data); 60void cchmac_final(const struct ccdigest_info *di, cchmac_ctx_t ctx, 61 unsigned char *mac); 62 63void 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 69struct 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 79int cchmac_test(const struct cchmac_test_input *input); 80int cchmac_test_chunks(const struct cchmac_test_input *input, unsigned long chunk_size); 81 82 83#endif /* _CORECRYPTO_CCHMAC_H_ */ 84