pub unsafe extern "C" fn nettle_rsa_sha256_verify(
key: *const rsa_public_key,
hash: *mut sha256_ctx,
signature: *const __mpz_struct,
) -> c_int
pub unsafe extern "C" fn nettle_rsa_sha256_verify(
key: *const rsa_public_key,
hash: *mut sha256_ctx,
signature: *const __mpz_struct,
) -> c_int