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-rw-r--r--nix/libutil/gcrypt-hash.cc50
1 files changed, 50 insertions, 0 deletions
diff --git a/nix/libutil/gcrypt-hash.cc b/nix/libutil/gcrypt-hash.cc
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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/>. */
+
+#include <config.h>
+
+#include <gcrypt-hash.hh>
+#include <assert.h>
+
+extern "C" {
+
+void
+guix_hash_init (struct guix_hash_context *ctx, gcry_md_algo_t algo)
+{
+ gcry_error_t err;
+
+ err = gcry_md_open (&ctx->md_handle, algo, 0);
+ assert (err == GPG_ERR_NO_ERROR);
+}
+
+void
+guix_hash_update (struct guix_hash_context *ctx, const void *buffer, size_t len)
+{
+ gcry_md_write (ctx->md_handle, buffer, len);
+}
+
+void
+guix_hash_final (void *resbuf, struct guix_hash_context *ctx,
+ gcry_md_algo_t algo)
+{
+ memcpy (resbuf, gcry_md_read (ctx->md_handle, algo),
+ gcry_md_get_algo_dlen (algo));
+ gcry_md_close (ctx->md_handle);
+}
+
+}