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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2025 Sadie Powell <sadie@witchery.services>
*
* 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/>.
*/
#include <sha1/sha1.c>
#include "inspircd.h"
#include "modules/hash.h"
#define SHA1_BLOCK_SIZE 64
#define SHA1_DIGEST_SIZE 20
class SHA1Context final
: public Hash::Context
{
private:
SHA1_CTX context;
public:
SHA1Context()
{
SHA1Init(&context);
}
void Update(const unsigned char *data, size_t len) override
{
SHA1Update(&context, data, static_cast<uint32_t>(len));
}
std::string Finalize() override
{
std::vector<unsigned char> digest(SHA1_DIGEST_SIZE);
SHA1Final(digest.data(), &context);
return std::string(reinterpret_cast<const char *>(digest.data()), digest.size());
}
};
class SHA1Provider final
: public Hash::Provider
{
private:
Hash::HMACProvider hmacsha1algo;
public:
SHA1Provider(const WeakModulePtr& mod, const std::string& algorithm)
: Hash::Provider(mod, algorithm, SHA1_DIGEST_SIZE, SHA1_BLOCK_SIZE)
, hmacsha1algo(mod, algorithm)
{
}
std::unique_ptr<Hash::Context> CreateContext() override
{
return std::make_unique<SHA1Context>();
}
bool IsPasswordSafe() const override
{
// Plain SHA-1 is not safe for password use as it can be decoded via the
// use of a rainbow table. You should use HMAC-SHA-1 instead as it is not
// vulnerable to this attack.
return false;
}
};
class ModuleHashSHA1 final
: public Module
{
private:
SHA1Provider sha1algo;
public:
ModuleHashSHA1()
: Module(VF_VENDOR, "Allows other modules to generate SHA-1 hashes.")
, sha1algo(weak_from_this(), "sha1")
{
}
void init() override
{
sha1algo.Check({
{ "da39a3ee5e6b4b0d3255bfef95601890afd80709", "" },
{ "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12", "The quick brown fox jumps over the lazy dog" },
});
}
};
MODULE_INIT(ModuleHashSHA1)
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