#ifndef IPUTILS_MD5DIG_H

#define IPUTILS_MD5DIG_H

#if defined(USE_GCRYPT)

# include <stdlib.h>

# include <gcrypt.h>

# define IPUTILS_MD5DIG_LEN	16

#elif defined(USE_NETTLE)

# include <nettle/md5.h>

#else

# include <openssl/md5.h>

#endif

#if defined(USE_GCRYPT)

typedef struct {

	gcry_md_hd_t dig;

} iputils_md5dig_ctx;

static void iputils_md5dig_init(iputils_md5dig_ctx *ctx)

{

	if (gcry_md_open(&ctx->dig, GCRY_MD_MD5, 0) != GPG_ERR_NO_ERROR)

		abort();

	return;

}

static void iputils_md5dig_update(iputils_md5dig_ctx *ctx,

			   void *buf, int len)

{

	gcry_md_write(ctx->dig, buf, len);

	return;

}

static void iputils_md5dig_final(unsigned char *digest,

				 iputils_md5dig_ctx *ctx)

{

	const void *p;

	size_t dlen;

	p = gcry_md_read(ctx->dig, GCRY_MD_MD5);

	dlen = gcry_md_get_algo_dlen(GCRY_MD_MD5);

	if (dlen != IPUTILS_MD5DIG_LEN)

		abort();

	memcpy(digest, p, dlen);

	gcry_md_close(ctx->dig);

}

# define MD5_DIGEST_LENGTH	IPUTILS_MD5DIG_LEN

# define MD5_CTX		iputils_md5dig_ctx

# define MD5_Init		iputils_md5dig_init

# define MD5_Update		iputils_md5dig_update

# define MD5_Final		iputils_md5dig_final

#elif defined(USE_NETTLE)

typedef struct md5_ctx iputils_md5dig_ctx;

static void iputils_md5dig_init(iputils_md5dig_ctx *ctx)

{

	md5_init(ctx);

	return;

}

static void iputils_md5dig_update(iputils_md5dig_ctx *ctx,

			   void *buf, int len)

{

	md5_update(ctx, len, buf);

	return;

}

static void iputils_md5dig_final(unsigned char *digest,

				 iputils_md5dig_ctx *ctx)

{

	md5_digest(ctx, MD5_DIGEST_SIZE, digest);

}

# define MD5_DIGEST_LENGTH	MD5_DIGEST_SIZE

# define MD5_CTX		iputils_md5dig_ctx

# define MD5_Init		iputils_md5dig_init

# define MD5_Update		iputils_md5dig_update

# define MD5_Final		iputils_md5dig_final

#endif

#endif