int MGF1(unsigned char *mask, long len, const unsigned char *seed, long seedlen)
	{
	return PKCS1_MGF1(mask, len, seed, seedlen, EVP_sha1());
	}
int MGF1(unsigned char *mask, long len, const unsigned char *seed, long seedlen)
	{
	return PKCS1_MGF1(mask, len, seed, seedlen, EVP_sha1());
	}