int rsa_check_key(const RSA *rsa, int protect);
int ec_check_key(const EC_KEY *ec, int protect);
int dsa_check_key(const DSA *dsa, int sign);
int rsa_check_key(const RSA *rsa, int protect);
int ec_check_key(const EC_KEY *ec, int protect);
int dsa_check_key(const DSA *dsa, int sign);
int digest_is_allowed(const EVP_MD *md);
int digest_get_approved_nid_with_sha1(const EVP_MD *md, int sha1_allowed);
int digest_is_allowed(const EVP_MD *md);
int digest_get_approved_nid_with_sha1(const EVP_MD *md, int sha1_allowed);
/* Functions that are common */
int digest_md_to_nid(const EVP_MD *md, const OSSL_ITEM *it, size_t it_len);
int digest_get_approved_nid(const EVP_MD *md);
/* Functions that are common */
int digest_md_to_nid(const EVP_MD *md, const OSSL_ITEM *it, size_t it_len);
int digest_get_approved_nid(const EVP_MD *md);