#include <err.h>
#include <string.h>

#include <openssl/evp.h>
#include <openssl/provider.h>

#define	EVP_rc4()	EVP_CIPHER_fetch(NULL, "rc4", "provider=legacy")
#define	EVP_md4()	EVP_MD_fetch(NULL, "md4", "provider=legacy")

int
main(void)
{
	const EVP_MD *md;
	EVP_MD_CTX *m;
	const char *msg = "hello";
	unsigned char h[32 + 1];		/* paranoia */

	printf("EVP_rc4() = %p\n", EVP_rc4());
	//printf("legacy = %p\n", OSSL_PROVIDER_load(NULL, "legacy"));
	printf("EVP_rc4() = %p\n", EVP_rc4());

	md = EVP_md4();
	printf("EVP_md4() = %p\n", md);
	if (md == NULL)
		errx(1, "EVP_md4");
	if ((m = EVP_MD_CTX_create()) == NULL)
		errx(1, "EVP_MD_CTX_create");
	EVP_DigestInit_ex(m, md, NULL);
	EVP_DigestUpdate(m, msg, strlen(msg));
	EVP_DigestFinal_ex(m, h, NULL);

	return 0;
}