3
5
Fork 0
mirror of git://git.savannah.gnu.org/guix.git synced 2023-12-14 03:33:07 +01:00
guix/nix/libutil/gcrypt-hash.cc
Ludovic Courtès 0c5028faea daemon: Fix 'HashSink::currentHash()'.
Before that, calls to 'HashSink::currentHash()' would eventually lead to
a segfault because the underlying gcrypt handle has been closed.  (Note
that this method is only used via 'importPaths' and 'exportPath', though.)

* nix/libutil/gcrypt-hash.hh (struct guix_hash_context): Add a
  constructor and a copy constructor; move out of 'extern "C"'.
* nix/libutil/gcrypt-hash.cc (guix_hash_final): Clear 'md_handle' upon
  exit.
* nix/sync-with-upstream (top_srcdir): Change hash.{cc,hh} to read
  'struct Ctx' instead of 'union Ctx'.
2013-12-19 00:02:49 +01:00

51 lines
1.4 KiB
C++

/* GNU Guix --- Functional package management for GNU
Copyright (C) 2012, 2013 Ludovic Courtès <ludo@gnu.org>
This file is part of GNU Guix.
GNU 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.
GNU 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 GNU 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, int 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,
int algo)
{
memcpy (resbuf, gcry_md_read (ctx->md_handle, algo),
gcry_md_get_algo_dlen (algo));
gcry_md_close (ctx->md_handle);
ctx->md_handle = NULL;
}
}