1 #ifndef __HMAC_H__ 2 #define __HMAC_H__ 3 4 #include <libecc/lib_ecc_config.h> 5 #ifdef WITH_HMAC 6 7 #include <libecc/words/words.h> 8 #include <libecc/utils/utils.h> 9 #include <libecc/hash/hash_algs.h> 10 11 #define HMAC_MAGIC ((word_t)(0x9849020187612083ULL)) 12 #define HMAC_CHECK_INITIALIZED(A, ret, err) \ 13 MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == HMAC_MAGIC) && ((A)->hash != NULL), ret, err) 14 15 /* The HMAC structure is made of two hash contexts */ 16 typedef struct { 17 /* The hash mapping associated with the hmac */ 18 const hash_mapping *hash; 19 /* The two hash contexts (inner and outer) */ 20 hash_context in_ctx; 21 hash_context out_ctx; 22 /* Initialization magic value */ 23 word_t magic; 24 } hmac_context; 25 26 ATTRIBUTE_WARN_UNUSED_RET int hmac_init(hmac_context *ctx, const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type); 27 28 ATTRIBUTE_WARN_UNUSED_RET int hmac_update(hmac_context *ctx, const u8 *input, u32 ilen); 29 30 ATTRIBUTE_WARN_UNUSED_RET int hmac_finalize(hmac_context *ctx, u8 *output, u8 *outlen); 31 32 ATTRIBUTE_WARN_UNUSED_RET int hmac(const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type, const u8 *input, u32 ilen, u8 *output, u8 *outlen); 33 34 ATTRIBUTE_WARN_UNUSED_RET int hmac_scattered(const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type, const u8 **inputs, const u32 *ilens, u8 *output, u8 *outlen); 35 36 #endif /* WITH_HMAC */ 37 38 #endif /* __HMAC_H__ */ 39