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+/* Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
+ Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
+
+ This file is part of Guix.
+
+ Guix is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or (at
+ your option) any later version.
+
+ Guix 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Guix. If not, see <http://www.gnu.org/licenses/>. */
+
+/* An OpenSSL-like interface to GNU libgcrypt cryptographic hash
+ functions. */
+
+#pragma once
+#include <gcrypt.h>
+#include <unistd.h>
+
+extern "C" {
+
+struct guix_hash_context
+{
+ gcry_md_hd_t md_handle;
+};
+
+extern void guix_hash_init (struct guix_hash_context *ctx, gcry_md_algo_t algo);
+extern void guix_hash_update (struct guix_hash_context *ctx, const void *buffer,
+ size_t len);
+extern void guix_hash_final (void *resbuf, struct guix_hash_context *ctx,
+ gcry_md_algo_t algo);
+
+}