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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
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Copyright (C) 2012, 2013 Ludovic Courtès <ludo@gnu.org>
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This file is part of GNU Guix.
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GNU Guix is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at
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your option) any later version.
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GNU Guix is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
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/* An OpenSSL-like interface to GNU libgcrypt cryptographic hash
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functions. */
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#pragma once
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#include <gcrypt.h>
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#include <unistd.h>
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struct guix_hash_context
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{
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/* This copy constructor is needed in 'HashSink::currentHash()' where we
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expect the copy of a 'Ctx' object to yield a truly different context. */
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guix_hash_context (guix_hash_context &ref)
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{
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if (ref.md_handle == NULL)
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md_handle = NULL;
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else
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gcry_md_copy (&md_handle, ref.md_handle);
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}
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/* Make sure 'md_handle' is always initialized. */
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guix_hash_context (): md_handle (NULL) { };
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gcry_md_hd_t md_handle;
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};
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extern "C" {
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extern void guix_hash_init (struct guix_hash_context *ctx, int algo);
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extern void guix_hash_update (struct guix_hash_context *ctx, const void *buffer,
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size_t len);
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extern void guix_hash_final (void *resbuf, struct guix_hash_context *ctx,
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int algo);
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}
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