/*__owur*/ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
const EVP_MD *md, ENGINE *impl);
/*__owur*/ int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data,
/*__owur*/ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
const EVP_MD *md, ENGINE *impl);
/*__owur*/ int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data,