/*-

* Copyright (c) 2014 Michihiro NAKAJIMA

* All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

*    notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

*    notice, this list of conditions and the following disclaimer in the

*    documentation and/or other materials provided with the distribution.

*

* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR

* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,

* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#ifndef __LIBARCHIVE_BUILD

#error This header is only to be used internally to libarchive.

#endif

#ifndef ARCHIVE_HMAC_PRIVATE_H_INCLUDED

#define ARCHIVE_HMAC_PRIVATE_H_INCLUDED

/*

 * On systems that do not support any recognized crypto libraries,

 * the archive_hmac.c file is expected to define no usable symbols.

 *

 * But some compilers and linkers choke on empty object files, so

 * define a public symbol that will always exist.  This could

 * be removed someday if this file gains another always-present

 * symbol definition.

 */

int __libarchive_hmac_build_hack(void);

#ifdef __APPLE__

# include <AvailabilityMacros.h>

# if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060

#  define ARCHIVE_HMAC_USE_Apple_CommonCrypto

# endif

#endif

#ifdef ARCHIVE_HMAC_USE_Apple_CommonCrypto

#include <CommonCrypto/CommonHMAC.h>

typedef	CCHmacContext archive_hmac_sha1_ctx;

#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)

#include <bcrypt.h>

typedef struct {

	BCRYPT_ALG_HANDLE	hAlg;

	BCRYPT_HASH_HANDLE	hHash;

	DWORD				hash_len;

	PBYTE				hash;

} archive_hmac_sha1_ctx;

#elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_HMAC_H)

#include <nettle/hmac.h>

typedef	struct hmac_sha1_ctx archive_hmac_sha1_ctx;

#elif defined(HAVE_LIBCRYPTO)

#include "archive_openssl_hmac_private.h"

typedef	HMAC_CTX* archive_hmac_sha1_ctx;

#else

typedef int archive_hmac_sha1_ctx;

#endif

/* HMAC */

#define archive_hmac_sha1_init(ctx, key, key_len)\

	__archive_hmac.__hmac_sha1_init(ctx, key, key_len)

#define archive_hmac_sha1_update(ctx, data, data_len)\

	__archive_hmac.__hmac_sha1_update(ctx, data, data_len)

#define archive_hmac_sha1_final(ctx, out, out_len)\

  	__archive_hmac.__hmac_sha1_final(ctx, out, out_len)

#define archive_hmac_sha1_cleanup(ctx)\

	__archive_hmac.__hmac_sha1_cleanup(ctx)

struct archive_hmac {

	/* HMAC */

	int (*__hmac_sha1_init)(archive_hmac_sha1_ctx *, const uint8_t *,

		size_t);

	void (*__hmac_sha1_update)(archive_hmac_sha1_ctx *, const uint8_t *,

		size_t);

	void (*__hmac_sha1_final)(archive_hmac_sha1_ctx *, uint8_t *, size_t *);

	void (*__hmac_sha1_cleanup)(archive_hmac_sha1_ctx *);

};

extern const struct archive_hmac __archive_hmac;

#endif /* ARCHIVE_HMAC_PRIVATE_H_INCLUDED */