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/* Include file for high-level encryption routines.
*
* (C) 2003-2024 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*
* Based on the original code of Epona by Lara.
* Based on the original code of Services by Andy Church.
*/
#include "module.h"
#include "modules/encryption.h"
static ServiceReference<Encryption::Provider> md5("Encryption::Provider", "md5");
class OldMD5Provider : public Encryption::Provider
{
public:
OldMD5Provider(Module *creator) : Encryption::Provider(creator, "oldmd5") { }
Encryption::Context *CreateContext(Encryption::IV *iv) anope_override
{
if (md5)
return md5->CreateContext(iv);
return NULL;
}
Encryption::IV GetDefaultIV() anope_override
{
if (md5)
return md5->GetDefaultIV();
return Encryption::IV(static_cast<const uint32_t *>(NULL), 0);
}
};
class EOld : public Module
{
OldMD5Provider oldmd5provider;
inline static char XTOI(char c) { return c > 9 ? c - 'A' + 10 : c - '0'; }
public:
EOld(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, ENCRYPTION | VENDOR),
oldmd5provider(this)
{
ModuleManager::LoadModule("enc_md5", User::Find(creator, true));
if (!md5)
throw ModuleException("Unable to find md5 reference");
}
EventReturn OnEncrypt(const Anope::string &src, Anope::string &dest) anope_override
{
if (!md5)
return EVENT_CONTINUE;
Encryption::Context *context = md5->CreateContext();
context->Update(reinterpret_cast<const unsigned char *>(src.c_str()), src.length());
context->Finalize();
Encryption::Hash hash = context->GetFinalizedHash();
char digest[32], digest2[16];
memset(digest, 0, sizeof(digest));
if (hash.second > sizeof(digest))
throw CoreException("Hash too large");
memcpy(digest, hash.first, hash.second);
for (int i = 0; i < 32; i += 2)
digest2[i / 2] = XTOI(digest[i]) << 4 | XTOI(digest[i + 1]);
Anope::string buf = "oldmd5:" + Anope::Hex(digest2, sizeof(digest2));
Log(LOG_DEBUG_2) << "(enc_old) hashed password from [" << src << "] to [" << buf << "]";
dest = buf;
delete context;
return EVENT_ALLOW;
}
void OnCheckAuthentication(User *, IdentifyRequest *req) anope_override
{
const NickAlias *na = NickAlias::Find(req->GetAccount());
if (na == NULL)
return;
NickCore *nc = na->nc;
size_t pos = nc->pass.find(':');
if (pos == Anope::string::npos)
return;
Anope::string hash_method(nc->pass.begin(), nc->pass.begin() + pos);
if (!hash_method.equals_cs("oldmd5"))
return;
Anope::string buf;
this->OnEncrypt(req->GetPassword(), buf);
if (nc->pass.equals_cs(buf))
{
/* if we are NOT the first module in the list,
* we want to re-encrypt the pass with the new encryption
*/
if (ModuleManager::FindFirstOf(ENCRYPTION) != this)
Anope::Encrypt(req->GetPassword(), nc->pass);
req->Success(this);
}
}
};
MODULE_INIT(EOld)
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