/*

 * Copyright (C) 2011 Colin Walters <walters@verbum.org>.

 *

 * SPDX-License-Identifier: LGPL-2.0+

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * Author: Colin Walters <walters@verbum.org>

 */

#pragma once

#include "libglnx.h"

G_BEGIN_DECLS

void ot_bin2hex (char *out_buf, const guint8 *inbuf, gsize len);

guchar *ot_csum_from_gchecksum (GChecksum *checksum);

struct OtChecksum {

  gboolean initialized;

  guint uints[2];

  gpointer data[2];

};

typedef struct OtChecksum OtChecksum;

/* Same as OSTREE_SHA256_DIGEST_LEN, but this header can't depend on that */

#define _OSTREE_SHA256_DIGEST_LEN (32)

#if defined(OSTREE_SHA256_DIGEST_LEN) && _OSTREE_SHA256_DIGEST_LEN != OSTREE_SHA256_DIGEST_LEN

#error Mismatched OSTREE_SHA256_DIGEST_LEN

#endif

/* See above */

#define _OSTREE_SHA256_STRING_LEN (64)

#if defined(OSTREE_SHA256_STRING_LEN) && _OSTREE_SHA256_STRING_LEN != OSTREE_SHA256_STRING_LEN

#error Mismatched OSTREE_SHA256_STRING_LEN

#endif

void ot_checksum_init (OtChecksum *checksum);

void ot_checksum_update (OtChecksum *checksum,

                         const guint8   *buf,

                         size_t          len);

static inline void

ot_checksum_update_bytes (OtChecksum *checksum,

                          GBytes     *buf)

{

  gsize len;

  const guint8 *bufdata = g_bytes_get_data (buf, &len;;

  ot_checksum_update (checksum, bufdata, len);

}

void ot_checksum_get_digest (OtChecksum *checksum,

                             guint8      *buf,

                             size_t       buflen);

void ot_checksum_get_hexdigest (OtChecksum *checksum,

                                char           *buf,

                                size_t          buflen);

void ot_checksum_clear (OtChecksum *checksum);

G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(OtChecksum, ot_checksum_clear)

gboolean ot_gio_write_update_checksum (GOutputStream  *out,

                                       gconstpointer   data,

                                       gsize           len,

                                       gsize          *out_bytes_written,

                                       OtChecksum     *checksum,

                                       GCancellable   *cancellable,

                                       GError        **error);

gboolean ot_gio_splice_get_checksum (GOutputStream  *out,

                                     GInputStream   *in,

                                     guchar        **out_csum,

                                     GCancellable   *cancellable,

                                     GError        **error);

gboolean ot_gio_splice_update_checksum (GOutputStream  *out,

                                        GInputStream   *in,

                                        OtChecksum     *checksum,

                                        GCancellable   *cancellable,

                                        GError        **error);

char * ot_checksum_file_at (int             dfd,

                            const char     *path,

                            GChecksumType   checksum_type,

                            GCancellable   *cancellable,

                            GError        **error);

void ot_checksum_bytes (GBytes *data,

                        guint8 out_digest[_OSTREE_SHA256_DIGEST_LEN]);

G_END_DECLS