// #include <openssl/hmac.h>
typedef struct GO_HMAC_CTX { char data[104]; } GO_HMAC_CTX;
void _goboringcrypto_HMAC_CTX_init(GO_HMAC_CTX*);
void _goboringcrypto_HMAC_CTX_cleanup(GO_HMAC_CTX*);
int _goboringcrypto_HMAC_Init(GO_HMAC_CTX*, const void*, int, const GO_EVP_MD*);
int _goboringcrypto_HMAC_Update(GO_HMAC_CTX*, const uint8_t*, size_t);
int _goboringcrypto_HMAC_Final(GO_HMAC_CTX*, uint8_t*, unsigned int*);