EVP_PKEY *load_key(BIO *err, const char *file, int format, int maybe_stdin,
const char *pass, ENGINE *e, const char *key_descrip);
EVP_PKEY *load_pubkey(BIO *err, const char *file, int format, int maybe_stdin,
EVP_PKEY *load_key(BIO *err, const char *file, int format, int maybe_stdin,
const char *pass, ENGINE *e, const char *key_descrip);
EVP_PKEY *load_pubkey(BIO *err, const char *file, int format, int maybe_stdin,