0c5028faea
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'.
50 lines
1.6 KiB
C++
50 lines
1.6 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/>. */
|
|
|
|
/* An OpenSSL-like interface to GNU libgcrypt cryptographic hash
|
|
functions. */
|
|
|
|
#pragma once
|
|
#include <gcrypt.h>
|
|
#include <unistd.h>
|
|
|
|
struct guix_hash_context
|
|
{
|
|
/* This copy constructor is needed in 'HashSink::currentHash()' where we
|
|
expect the copy of a 'Ctx' object to yield a truly different context. */
|
|
guix_hash_context (guix_hash_context &ref)
|
|
{
|
|
if (ref.md_handle == NULL)
|
|
md_handle = NULL;
|
|
else
|
|
gcry_md_copy (&md_handle, ref.md_handle);
|
|
}
|
|
|
|
/* Make sure 'md_handle' is always initialized. */
|
|
guix_hash_context (): md_handle (NULL) { };
|
|
|
|
gcry_md_hd_t md_handle;
|
|
};
|
|
|
|
extern "C" {
|
|
extern void guix_hash_init (struct guix_hash_context *ctx, int 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,
|
|
int algo);
|
|
}
|