# ifdef OPENSSL_NO_HMAC
# error HMAC is disabled.
# endif
# include
# define HMAC_MAX_MD_CBLOCK 128/* largest known is SHA512 */
#ifdef __cplusplus
extern "C" {
#endif
typedef struct hmac_ctx_st {
const EVP_MD *md;
EVP_MD_CTX md_ctx;
EVP_MD_CTX i_ctx;
EVP_MD_CTX o_ctx;
unsigned int key_length;
unsigned char key[HMAC_MAX_MD_CBLOCK];
} HMAC_CTX;
# define HMAC_size(e) (EVP_MD_size((e)->md))
void HMAC_CTX_init(HMAC_CTX *ctx);
void HMAC_CTX_cleanup(HMAC_CTX *ctx);
/* deprecated */
# define HMAC_cleanup(ctx) HMAC_CTX_cleanup(ctx)
/* deprecated */
int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md);
int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
const EVP_MD *md, ENGINE *impl);
int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len);
int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
const unsigned char *d, size_t n, unsigned char *md,
unsigned int *md_len);
int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx);
void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags);
#ifdef __cplusplus
}
#endif
#endif