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/*******************************************************************************
libTMCG.cc, general functions of the library
This file is part of LibTMCG.
Copyright (C) 2004, 2005, 2007,
2016, 2017, 2018, 2019 Heiko Stamer <[email protected]>
LibTMCG 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 2 of the License, or
(at your option) any later version.
LibTMCG 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 LibTMCG; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*******************************************************************************/
// include headers
#ifdef HAVE_CONFIG_H
#include "libTMCG_config.h"
#endif
#include "libTMCG.hh"
#ifdef BOTAN
#include <botan/version.h>
#endif
// LibTMCG identifier
static const std::string LibTMCG_ID =
"LibTMCG " VERSION " (C) Heiko Stamer, License: GNU GPL v2 (or later)";
// LibTMCG helper functions
void* tmcg_realloc
(void* ptr, size_t old_size, size_t new_size)
{
assert((old_size == 0) || (old_size != 0)); // to supress compiler warning
return gcry_realloc(ptr, new_size);
}
void tmcg_free
(void* ptr, size_t size)
{
if (size > 0)
gcry_free(ptr);
}
// LibTMCG general functions
bool init_libTMCG
(const bool force_secmem, const bool gmp_secmem, const size_t max_secmem)
{
// initialize memory guards
CallasDonnerhackeFinneyShawThayerRFC4880::MemoryGuardReset();
// initialize libgcrypt
if (!gcry_check_version(TMCG_LIBGCRYPT_VERSION))
{
std::cerr << "init_libTMCG(): libgcrypt version >= " <<
TMCG_LIBGCRYPT_VERSION << " required" << std::endl;
return false;
}
if (!gcry_control(GCRYCTL_INITIALIZATION_FINISHED_P))
{
if (force_secmem)
{
gcry_control(GCRYCTL_SUSPEND_SECMEM_WARN);
gcry_control(GCRYCTL_USE_SECURE_RNDPOOL);
gcry_control(GCRYCTL_INIT_SECMEM, max_secmem, 0);
gcry_control(GCRYCTL_RESUME_SECMEM_WARN);
}
else
gcry_control(GCRYCTL_DISABLE_SECMEM, 0); // disable secure memory
gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
}
// check libgcrypt
gcry_error_t ret = gcry_control(GCRYCTL_SELFTEST);
if (ret)
{
std::cerr << "init_libTMCG(): libgcrypt self-test " <<
"failed (rc = " << gcry_err_code(ret) << ", str = " <<
gcry_strerror(ret) << ")" << std::endl;
return false;
}
if (gcry_md_test_algo(TMCG_GCRY_MD_ALGO)) // check for digest algorithm
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
TMCG_GCRY_MD_ALGO << " [" <<
gcry_md_algo_name(TMCG_GCRY_MD_ALGO) <<
"] not available" << std::endl;
return false;
}
if (gcry_mac_test_algo(TMCG_GCRY_MAC_ALGO)) // check for MAC algorithm
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
TMCG_GCRY_MAC_ALGO << " [" <<
gcry_mac_algo_name(TMCG_GCRY_MAC_ALGO) <<
"] not available" << std::endl;
return false;
}
if (gcry_cipher_test_algo(TMCG_GCRY_ENC_ALGO)) // check for cipher
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
TMCG_GCRY_ENC_ALGO << " [" <<
gcry_cipher_algo_name(TMCG_GCRY_ENC_ALGO) <<
"] not available" << std::endl;
return false;
}
if (gcry_md_test_algo(GCRY_MD_SHA1)) // check for SHA-1
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_MD_SHA1 << " [" <<
"SHA-1" <<
"] not available" << std::endl;
return false;
}
if (gcry_md_test_algo(GCRY_MD_SHA256)) // check for SHA2-256
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_MD_SHA256 << " [" <<
"SHA2-256" <<
"] not available" << std::endl;
return false;
}
if (gcry_md_test_algo(GCRY_MD_SHA384)) // check for SHA2-384
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_MD_SHA384 << " [" <<
"SHA2-384" <<
"] not available" << std::endl;
return false;
}
if (gcry_md_test_algo(GCRY_MD_SHA512)) // check for SHA2-512
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_MD_SHA512 << " [" <<
"SHA2-512" <<
"] not available" << std::endl;
return false;
}
if (gcry_cipher_test_algo(GCRY_CIPHER_AES)) // check for AES128
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_CIPHER_AES << " [" <<
"AES128" <<
"] not available" << std::endl;
return false;
}
if (gcry_cipher_test_algo(GCRY_CIPHER_AES192)) // check for AES192
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_CIPHER_AES192 << " [" <<
"AES192" <<
"] not available" << std::endl;
return false;
}
if (gcry_cipher_test_algo(GCRY_CIPHER_AES256)) // check for AES256
{
std::cerr << "init_libTMCG(): libgcrypt algorithm " <<
GCRY_CIPHER_AES256 << " [" <<
"AES256" <<
"] not available" << std::endl;
return false;
}
// initialize libgmp
if (strcmp(gmp_version, TMCG_LIBGMP_VERSION) < 0)
{
std::cerr << "init_libTMCG(): libgmp version >= " <<
TMCG_LIBGMP_VERSION << " required" << std::endl;
return false;
}
if (gmp_secmem)
mp_set_memory_functions(gcry_malloc_secure, tmcg_realloc, tmcg_free);
#ifdef BOTAN
// initialize libbotan-2
std::string botan_rvc = Botan::runtime_version_check(BOTAN_VERSION_MAJOR,
BOTAN_VERSION_MINOR, BOTAN_VERSION_PATCH);
if (botan_rvc != "")
{
std::cerr << "init_libTMCG(): libbotan-2 runtime version check" <<
" failed with \"" << botan_rvc << "\"" << std::endl;
return false;
}
#endif
return true;
}
const std::string version_libTMCG
()
{
return std::string(VERSION);
}
const std::string identifier_libTMCG
()
{
return LibTMCG_ID;
}
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