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/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* This program 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.
*
* 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 "SecretMgr.h"
#include "AES.h"
#include "Argon2.h"
#include "Config.h"
#include "CryptoGenerics.h"
#include "DatabaseEnv.h"
#include "Errors.h"
#include "Log.h"
#define SECRET_FLAG_FOR(key, val, server) server ## _ ## key = (val ## ull << (16*SECRET_OWNER_ ## server))
#define SECRET_FLAG(key, val) SECRET_FLAG_ ## key = val, SECRET_FLAG_FOR(key, val, BNETSERVER), SECRET_FLAG_FOR(key, val, WORLDSERVER)
enum SecretFlags : uint64
{
SECRET_FLAG(DEFER_LOAD, 0x1)
};
#undef SECRET_FLAG_FOR
#undef SECRET_FLAG
struct SecretInfo
{
char const* configKey;
char const* oldKey;
int bits;
SecretOwner owner;
uint64 _flags;
uint16 flags() const { return static_cast<uint16>(_flags >> (16*SecretMgr::OWNER)); }
};
static constexpr SecretInfo secret_info[NUM_SECRETS] =
{
{ "TOTPMasterSecret", "TOTPOldMasterSecret", 128, SECRET_OWNER_BNETSERVER, WORLDSERVER_DEFER_LOAD }
};
SecretOwner SecretMgr::OWNER;
/*static*/ SecretMgr* SecretMgr::instance()
{
static SecretMgr instance;
return &instance;
}
static Optional<BigNumber> GetHexFromConfig(char const* configKey, int bits)
{
ASSERT(bits > 0);
std::string str = sConfigMgr->GetStringDefault(configKey, "");
if (str.empty())
return {};
BigNumber secret;
if (!secret.SetHexStr(str.c_str()))
{
TC_LOG_FATAL("server.loading", "Invalid value for '{}' - specify a hexadecimal integer of up to {} bits with no prefix.", configKey, bits);
ABORT();
}
BigNumber threshold(2);
threshold <<= bits;
if (!((BigNumber(0) <= secret) && (secret < threshold)))
{
TC_LOG_ERROR("server.loading", "Value for '{}' is out of bounds (should be an integer of up to {} bits with no prefix). Truncated to {} bits.", configKey, bits, bits);
secret %= threshold;
}
ASSERT(((BigNumber(0) <= secret) && (secret < threshold)));
return secret;
}
void SecretMgr::Initialize(SecretOwner owner)
{
OWNER = owner;
for (uint32 i = 0; i < NUM_SECRETS; ++i)
{
if (secret_info[i].flags() & SECRET_FLAG_DEFER_LOAD)
continue;
std::unique_lock<std::mutex> lock(_secrets[i].lock);
AttemptLoad(Secrets(i), LOG_LEVEL_FATAL, lock);
if (!_secrets[i].IsAvailable())
ABORT(); // load failed
}
}
SecretMgr::Secret const& SecretMgr::GetSecret(Secrets i)
{
std::unique_lock<std::mutex> lock(_secrets[i].lock);
if (_secrets[i].state == Secret::NOT_LOADED_YET)
AttemptLoad(i, LOG_LEVEL_ERROR, lock);
return _secrets[i];
}
void SecretMgr::AttemptLoad(Secrets i, LogLevel errorLevel, std::unique_lock<std::mutex> const&)
{
auto const& info = secret_info[i];
Optional<std::string> oldDigest;
{
LoginDatabasePreparedStatement* stmt = LoginDatabase.GetPreparedStatement(LOGIN_SEL_SECRET_DIGEST);
stmt->setUInt32(0, i);
PreparedQueryResult result = LoginDatabase.Query(stmt);
if (result)
oldDigest = result->Fetch()->GetString();
}
Optional<BigNumber> currentValue = GetHexFromConfig(info.configKey, info.bits);
// verify digest
if (
((!oldDigest) != (!currentValue)) || // there is an old digest, but no current secret (or vice versa)
(oldDigest && !Trinity::Crypto::Argon2::Verify(currentValue->AsHexStr(), *oldDigest)) // there is an old digest, and the current secret does not match it
)
{
if (info.owner != OWNER)
{
if (currentValue)
TC_LOG_MESSAGE_BODY("server.loading", errorLevel, "Invalid value for '{}' specified - this is not actually the secret being used in your auth DB.", info.configKey);
else
TC_LOG_MESSAGE_BODY("server.loading", errorLevel, "No value for '{}' specified - please specify the secret currently being used in your auth DB.", info.configKey);
_secrets[i].state = Secret::LOAD_FAILED;
return;
}
Optional<BigNumber> oldSecret;
if (oldDigest && info.oldKey) // there is an old digest, so there might be an old secret (if possible)
{
oldSecret = GetHexFromConfig(info.oldKey, info.bits);
if (oldSecret && !Trinity::Crypto::Argon2::Verify(oldSecret->AsHexStr(), *oldDigest))
{
TC_LOG_MESSAGE_BODY("server.loading", errorLevel, "Invalid value for '{}' specified - this is not actually the secret previously used in your auth DB.", info.oldKey);
_secrets[i].state = Secret::LOAD_FAILED;
return;
}
}
// attempt to transition us to the new key, if possible
Optional<std::string> error = AttemptTransition(Secrets(i), currentValue, oldSecret, !!oldDigest);
if (error)
{
TC_LOG_MESSAGE_BODY("server.loading", errorLevel, "Your value of '{}' changed, but we cannot transition your database to the new value:\n{}", info.configKey, error->c_str());
_secrets[i].state = Secret::LOAD_FAILED;
return;
}
TC_LOG_INFO("server.loading", "Successfully transitioned database to new '{}' value.", info.configKey);
}
if (currentValue)
{
_secrets[i].state = Secret::PRESENT;
_secrets[i].value = *currentValue;
}
else
_secrets[i].state = Secret::NOT_PRESENT;
}
Optional<std::string> SecretMgr::AttemptTransition(Secrets i, Optional<BigNumber> const& newSecret, Optional<BigNumber> const& oldSecret, bool hadOldSecret) const
{
LoginDatabaseTransaction trans = LoginDatabase.BeginTransaction();
switch (i)
{
case SECRET_TOTP_MASTER_KEY:
{
QueryResult result = LoginDatabase.Query("SELECT id, totp_secret FROM account");
if (result) do
{
Field* fields = result->Fetch();
if (fields[1].IsNull())
continue;
uint32 id = fields[0].GetUInt32();
std::vector<uint8> totpSecret = fields[1].GetBinary();
if (hadOldSecret)
{
if (!oldSecret)
return Trinity::StringFormat("Cannot decrypt old TOTP tokens - add config key '{}' to authserver.conf!", secret_info[i].oldKey);
bool success = Trinity::Crypto::AEDecrypt<Trinity::Crypto::AES>(totpSecret, oldSecret->ToByteArray<Trinity::Crypto::AES::KEY_SIZE_BYTES>());
if (!success)
return Trinity::StringFormat("Cannot decrypt old TOTP tokens - value of '{}' is incorrect for some users!", secret_info[i].oldKey);
}
if (newSecret)
Trinity::Crypto::AEEncryptWithRandomIV<Trinity::Crypto::AES>(totpSecret, newSecret->ToByteArray<Trinity::Crypto::AES::KEY_SIZE_BYTES>());
LoginDatabasePreparedStatement* updateStmt = LoginDatabase.GetPreparedStatement(LOGIN_UPD_ACCOUNT_TOTP_SECRET);
updateStmt->setBinary(0, totpSecret);
updateStmt->setUInt32(1, id);
trans->Append(updateStmt);
} while (result->NextRow());
break;
}
default:
return std::string("Unknown secret index - huh?");
}
if (hadOldSecret)
{
LoginDatabasePreparedStatement* deleteStmt = LoginDatabase.GetPreparedStatement(LOGIN_DEL_SECRET_DIGEST);
deleteStmt->setUInt32(0, i);
trans->Append(deleteStmt);
}
if (newSecret)
{
BigNumber salt;
salt.SetRand(128);
Optional<std::string> hash = Trinity::Crypto::Argon2::Hash(newSecret->AsHexStr(), salt);
if (!hash)
return std::string("Failed to hash new secret");
LoginDatabasePreparedStatement* insertStmt = LoginDatabase.GetPreparedStatement(LOGIN_INS_SECRET_DIGEST);
insertStmt->setUInt32(0, i);
insertStmt->setString(1, *hash);
trans->Append(insertStmt);
}
LoginDatabase.CommitTransaction(trans);
return {};
}
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