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#include "rakp12.hpp"
#include "comm_module.hpp"
#include "endian.hpp"
#include "guid.hpp"
#include "main.hpp"
#include <openssl/rand.h>
#include <algorithm>
#include <cstring>
#include <iomanip>
#include <iostream>
namespace command
{
std::vector<uint8_t> RAKP12(const std::vector<uint8_t>& inPayload,
const message::Handler& handler)
{
std::vector<uint8_t> outPayload(sizeof(RAKP2response));
auto request = reinterpret_cast<const RAKP1request*>(inPayload.data());
auto response = reinterpret_cast<RAKP2response*>(outPayload.data());
// Session ID zero is reserved for Session Setup
if (endian::from_ipmi(request->managedSystemSessionID) ==
session::SESSION_ZERO)
{
std::cerr << "RAKP12: BMC invalid Session ID\n";
response->rmcpStatusCode =
static_cast<uint8_t>(RAKP_ReturnCode::INVALID_SESSION_ID);
return outPayload;
}
std::shared_ptr<session::Session> session;
try
{
session =
std::get<session::Manager&>(singletonPool)
.getSession(endian::from_ipmi(request->managedSystemSessionID));
}
catch (std::exception& e)
{
std::cerr << e.what() << "\n";
response->rmcpStatusCode =
static_cast<uint8_t>(RAKP_ReturnCode::INVALID_SESSION_ID);
return outPayload;
}
auto rakp1Size =
sizeof(RAKP1request) - (userNameMaxLen - request->user_name_len);
// Validate user name length in the message
if (request->user_name_len > userNameMaxLen ||
inPayload.size() != rakp1Size)
{
response->rmcpStatusCode =
static_cast<uint8_t>(RAKP_ReturnCode::INVALID_NAME_LENGTH);
return outPayload;
}
session->userName.assign(request->user_name, request->user_name_len);
// Validate the user name if the username is provided
if (request->user_name_len &&
(session->userName != cipher::rakp_auth::userName))
{
response->rmcpStatusCode =
static_cast<uint8_t>(RAKP_ReturnCode::UNAUTH_NAME);
return outPayload;
}
// Update transaction time
session->updateLastTransactionTime();
auto rcSessionID = endian::to_ipmi(session->getRCSessionID());
auto bmcSessionID = endian::to_ipmi(session->getBMCSessionID());
auto authAlgo = session->getAuthAlgo();
/*
* Generate Key Authentication Code - RAKP 2
*
* 1) Remote Console Session ID - 4 bytes
* 2) Managed System Session ID - 4 bytes
* 3) Remote Console Random Number - 16 bytes
* 4) Managed System Random Number - 16 bytes
* 5) Managed System GUID - 16 bytes
* 6) Requested Privilege Level - 1 byte
* 7) User Name Length Byte - 1 byte (0 for 'null' username)
* 8) User Name - variable (absent for 'null' username)
*/
std::vector<uint8_t> input;
input.resize(sizeof(rcSessionID) + sizeof(bmcSessionID) +
cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN +
cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN + BMC_GUID_LEN +
sizeof(request->req_max_privilege_level) +
sizeof(request->user_name_len) + session->userName.size());
auto iter = input.begin();
// Remote Console Session ID
std::copy_n(reinterpret_cast<uint8_t*>(&rcSessionID), sizeof(rcSessionID),
iter);
std::advance(iter, sizeof(rcSessionID));
// Managed System Session ID
std::copy_n(reinterpret_cast<uint8_t*>(&bmcSessionID), sizeof(bmcSessionID),
iter);
std::advance(iter, sizeof(bmcSessionID));
// Copy the Remote Console Random Number from the RAKP1 request to the
// Authentication Algorithm
std::copy_n(
reinterpret_cast<const uint8_t*>(request->remote_console_random_number),
cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN,
authAlgo->rcRandomNum.begin());
std::copy(authAlgo->rcRandomNum.begin(), authAlgo->rcRandomNum.end(), iter);
std::advance(iter, cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN);
// Generate the Managed System Random Number
if (!RAND_bytes(input.data() + sizeof(rcSessionID) + sizeof(bmcSessionID) +
cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN,
cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN))
{
response->rmcpStatusCode =
static_cast<uint8_t>(RAKP_ReturnCode::INSUFFICIENT_RESOURCE);
return outPayload;
}
// Copy the Managed System Random Number to the Authentication Algorithm
std::copy_n(iter, cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN,
authAlgo->bmcRandomNum.begin());
std::advance(iter, cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN);
// Managed System GUID
std::copy_n(cache::guid.data(), cache::guid.size(), iter);
std::advance(iter, BMC_GUID_LEN);
// Requested Privilege Level
session->curPrivLevel =
static_cast<session::Privilege>(request->req_max_privilege_level);
std::copy_n(&(request->req_max_privilege_level),
sizeof(request->req_max_privilege_level), iter);
std::advance(iter, sizeof(request->req_max_privilege_level));
// Set Max Privilege to ADMIN
session->maxPrivLevel = session::Privilege::ADMIN;
// User Name Length Byte
std::copy_n(&(request->user_name_len), sizeof(request->user_name_len),
iter);
std::advance(iter, sizeof(request->user_name_len));
std::copy_n(session->userName.data(), session->userName.size(), iter);
// Generate Key Exchange Authentication Code - RAKP2
auto output = authAlgo->generateHMAC(input);
response->messageTag = request->messageTag;
response->rmcpStatusCode = static_cast<uint8_t>(RAKP_ReturnCode::NO_ERROR);
response->reserved = 0;
response->remoteConsoleSessionID = rcSessionID;
// Copy Managed System Random Number to the Response
std::copy(authAlgo->bmcRandomNum.begin(), authAlgo->bmcRandomNum.end(),
response->managed_system_random_number);
// Copy System GUID to the Response
std::copy_n(cache::guid.data(), cache::guid.size(),
response->managed_system_guid);
// Insert the HMAC output into the payload
outPayload.insert(outPayload.end(), output.begin(), output.end());
return outPayload;
}
} // namespace command
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