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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2020 Daniel Vassdal <shutter@canternet.org>
*
* This file is part of InspIRCd. InspIRCd 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, version 2.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/// $CompilerFlags: find_compiler_flags("libargon2" "")
/// $LinkerFlags: find_linker_flags("libargon2" "-largon2")
/// $PackageInfo: require_system("arch") argon2 pkgconf
/// $PackageInfo: require_system("darwin") argon2 pkg-config
/// $PackageInfo: require_system("debian" "9.0") libargon2-0 pkg-config
/// $PackageInfo: require_system("ubuntu" "18.04") libargon2-0-dev pkg-config
#include "inspircd.h"
#include "modules/hash.h"
#ifdef __GNUC__
# pragma GCC diagnostic push
#endif
// Fix warnings about the use of `long long` on C++03
#if defined __clang__
# pragma clang diagnostic ignored "-Wc++11-long-long"
#elif defined __GNUC__
# pragma GCC diagnostic ignored "-Wlong-long"
#endif
#include <argon2.h>
class ProviderConfig
{
private:
static Argon2_version SanitizeArgon2Version(unsigned long version)
{
// Note, 10 is 0x10, and 13 is 0x13. Referring to it as
// dec 10 or 13 in the config file, for the name to
// match better.
switch (version)
{
case 10:
return ARGON2_VERSION_10;
case 13:
return ARGON2_VERSION_13;
}
ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Unknown Argon2 version (%lu) specified; assuming 13",
version);
return ARGON2_VERSION_13;
}
public:
uint32_t iterations;
uint32_t lanes;
uint32_t memory;
uint32_t outlen;
uint32_t saltlen;
uint32_t threads;
Argon2_version version;
ProviderConfig()
{
// Nothing interesting happens here.
}
ProviderConfig(const std::string& tagname, ProviderConfig* def)
{
ConfigTag* tag = ServerInstance->Config->ConfValue(tagname);
uint32_t def_iterations = def ? def->iterations : 3;
this->iterations = tag->getUInt("iterations", def_iterations, 1);
uint32_t def_lanes = def ? def->lanes : 1;
this->lanes = tag->getUInt("lanes", def_lanes, ARGON2_MIN_LANES, ARGON2_MAX_LANES);
uint32_t def_memory = def ? def->memory : 131072; // 128 MiB
this->memory = tag->getUInt("memory", def_memory, ARGON2_MIN_MEMORY, ARGON2_MAX_MEMORY);
uint32_t def_outlen = def ? def->outlen : 32;
this->outlen = tag->getUInt("length", def_outlen, ARGON2_MIN_OUTLEN, ARGON2_MAX_OUTLEN);
uint32_t def_saltlen = def ? def->saltlen : 16;
this->saltlen = tag->getUInt("saltlength", def_saltlen, ARGON2_MIN_SALT_LENGTH, ARGON2_MAX_SALT_LENGTH);
uint32_t def_threads = def ? def->threads : 1;
this->threads = tag->getUInt("threads", def_threads, ARGON2_MIN_THREADS, ARGON2_MAX_THREADS);
uint32_t def_version = def ? def->version : 13;
this->version = SanitizeArgon2Version(tag->getUInt("version", def_version));
}
};
class HashArgon2 : public HashProvider
{
private:
const Argon2_type argon2Type;
public:
ProviderConfig config;
bool Compare(const std::string& input, const std::string& hash) CXX11_OVERRIDE
{
int result = argon2_verify(
hash.c_str(),
input.c_str(),
input.length(),
argon2Type);
return result == ARGON2_OK;
}
std::string GenerateRaw(const std::string& data) CXX11_OVERRIDE
{
const std::string salt = ServerInstance->GenRandomStr(config.saltlen, false);
size_t encodedLen = argon2_encodedlen(
config.iterations,
config.memory,
config.lanes,
config.saltlen,
config.outlen,
argon2Type);
std::vector<char> raw_data(config.outlen);
std::vector<char> encoded_data(encodedLen + 1);
int argonResult = argon2_hash(
config.iterations,
config.memory,
config.threads,
data.c_str(),
data.length(),
salt.c_str(),
salt.length(),
&raw_data[0],
raw_data.size(),
&encoded_data[0],
encoded_data.size(),
argon2Type,
config.version);
if (argonResult != ARGON2_OK)
throw ModuleException("Argon2 hashing failed!: " + std::string(argon2_error_message(argonResult)));
// This isn't the raw version, but we don't have
// the facilities to juggle around the extra state required
// to do anything useful with them if we don't encode them.
// So we pretend this is the raw version, and instead make
// ToPrintable return its input.
return std::string(&encoded_data[0], encoded_data.size());
}
std::string ToPrintable(const std::string& raw) CXX11_OVERRIDE
{
return raw;
}
HashArgon2(Module* parent, const std::string& hashName, Argon2_type type)
: HashProvider(parent, hashName)
, argon2Type(type)
{
}
};
class ModuleArgon2 : public Module
{
private:
HashArgon2 argon2i;
HashArgon2 argon2d;
HashArgon2 argon2id;
public:
ModuleArgon2()
: argon2i(this, "argon2i", Argon2_i)
, argon2d(this, "argon2d", Argon2_d)
, argon2id(this, "argon2id", Argon2_id)
{
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Allows other modules to generate Argon2 hashes.", VF_VENDOR);
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ProviderConfig defaultConfig("argon2", NULL);
argon2i.config = ProviderConfig("argon2i", &defaultConfig);
argon2d.config = ProviderConfig("argon2d", &defaultConfig);
argon2id.config = ProviderConfig("argon2id", &defaultConfig);
}
};
MODULE_INIT(ModuleArgon2)
// This needs to be down here because of warnings from macros.
#ifdef __GNUC__
# pragma GCC diagnostic pop
#endif
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