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#include "channel.hpp"
#include "transporthandler.hpp"
#include "user_channel/channel_layer.hpp"
#include <arpa/inet.h>
#include <boost/process/child.hpp>
#include <fstream>
#include <ipmid/types.hpp>
#include <ipmid/utils.hpp>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/log.hpp>
#include <set>
#include <string>
#include <xyz/openbmc_project/Common/error.hpp>
using namespace phosphor::logging;
using namespace sdbusplus::xyz::openbmc_project::Common::Error;
namespace cipher
{
/** @brief Get the supported Cipher records
*
* The cipher records are read from the JSON file and converted into
* 1. cipher suite record format mentioned in the IPMI specification. The
* records can be either OEM or standard cipher. Each json entry is parsed and
* converted into the cipher record format and pushed into the vector.
* 2. Algorithms listed in vector format
*
* @return pair of vector containing 1. all the cipher suite records. 2.
* Algorithms supported
*
*/
std::pair<std::vector<uint8_t>, std::vector<uint8_t>> getCipherRecords()
{
std::vector<uint8_t> cipherRecords;
std::vector<uint8_t> supportedAlgorithmRecords;
// create set to get the unique supported algorithms
std::set<uint8_t> supportedAlgorithmSet;
std::ifstream jsonFile(configFile);
if (!jsonFile.is_open())
{
log<level::ERR>("Channel Cipher suites file not found");
elog<InternalFailure>();
}
auto data = Json::parse(jsonFile, nullptr, false);
if (data.is_discarded())
{
log<level::ERR>("Parsing channel cipher suites JSON failed");
elog<InternalFailure>();
}
for (const auto& record : data)
{
if (record.find(oem) != record.end())
{
// OEM cipher suite - 0xC1
cipherRecords.push_back(oemCipherSuite);
// Cipher Suite ID
cipherRecords.push_back(record.value(cipher, 0));
// OEM IANA - 3 bytes
cipherRecords.push_back(record.value(oem, 0));
cipherRecords.push_back(record.value(oem, 0) >> 8);
cipherRecords.push_back(record.value(oem, 0) >> 16);
}
else
{
// Standard cipher suite - 0xC0
cipherRecords.push_back(stdCipherSuite);
// Cipher Suite ID
cipherRecords.push_back(record.value(cipher, 0));
}
// Authentication algorithm number
cipherRecords.push_back(record.value(auth, 0));
supportedAlgorithmSet.insert(record.value(auth, 0));
// Integrity algorithm number
cipherRecords.push_back(record.value(integrity, 0) | integrityTag);
supportedAlgorithmSet.insert(record.value(integrity, 0) | integrityTag);
// Confidentiality algorithm number
cipherRecords.push_back(record.value(conf, 0) | confTag);
supportedAlgorithmSet.insert(record.value(conf, 0) | confTag);
}
// copy the set to supportedAlgorithmRecord which is vector based.
std::copy(supportedAlgorithmSet.begin(), supportedAlgorithmSet.end(),
std::back_inserter(supportedAlgorithmRecords));
return std::make_pair(cipherRecords, supportedAlgorithmRecords);
}
} // namespace cipher
ipmi_ret_t getChannelCipherSuites(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
ipmi_request_t request,
ipmi_response_t response,
ipmi_data_len_t data_len,
ipmi_context_t context)
{
static std::vector<uint8_t> cipherRecords;
static std::vector<uint8_t> supportedAlgorithms;
static auto recordInit = false;
auto requestData =
reinterpret_cast<const GetChannelCipherRequest*>(request);
if (*data_len < sizeof(GetChannelCipherRequest))
{
*data_len = 0;
return IPMI_CC_REQ_DATA_LEN_INVALID;
}
*data_len = 0;
if (!recordInit)
{
try
{
std::tie(cipherRecords, supportedAlgorithms) =
cipher::getCipherRecords();
recordInit = true;
}
catch (const std::exception& e)
{
return IPMI_CC_UNSPECIFIED_ERROR;
}
}
const auto& records = (cipher::listCipherSuite ==
(requestData->listIndex & cipher::listTypeMask))
? cipherRecords
: supportedAlgorithms;
// List index(00h-3Fh), 0h selects the first set of 16, 1h selects the next
// set of 16 and so on.
auto index =
static_cast<size_t>(requestData->listIndex & cipher::listIndexMask);
// Calculate the number of record data bytes to be returned.
auto start = std::min(index * cipher::respSize, records.size());
auto end =
std::min((index * cipher::respSize) + cipher::respSize, records.size());
auto size = end - start;
auto responseData = reinterpret_cast<GetChannelCipherRespHeader*>(response);
responseData->channelNumber = cipher::defaultChannelNumber;
if (!size)
{
*data_len = sizeof(GetChannelCipherRespHeader);
}
else
{
std::copy_n(records.data() + start, size,
static_cast<uint8_t*>(response) + 1);
*data_len = size + sizeof(GetChannelCipherRespHeader);
}
return IPMI_CC_OK;
}
template <typename... ArgTypes>
static int executeCmd(const char* path, ArgTypes&&... tArgs)
{
boost::process::child execProg(path, const_cast<char*>(tArgs)...);
execProg.wait();
return execProg.exit_code();
}
/** @brief Enable the network IPMI service on the specified ethernet interface.
*
* @param[in] intf - ethernet interface on which to enable IPMI
*/
void enableNetworkIPMI(const std::string& intf)
{
// Check if there is a iptable filter to drop IPMI packets for the
// interface.
auto retCode =
executeCmd("/usr/sbin/iptables", "-C", "INPUT", "-p", "udp", "-i",
intf.c_str(), "--dport", "623", "-j", "DROP");
// If the iptable filter exists, delete the filter.
if (!retCode)
{
auto response =
executeCmd("/usr/sbin/iptables", "-D", "INPUT", "-p", "udp", "-i",
intf.c_str(), "--dport", "623", "-j", "DROP");
if (response)
{
log<level::ERR>("Dropping the iptables filter failed",
entry("INTF=%s", intf.c_str()),
entry("RETURN_CODE:%d", response));
}
}
}
/** @brief Disable the network IPMI service on the specified ethernet interface.
*
* @param[in] intf - ethernet interface on which to disable IPMI
*/
void disableNetworkIPMI(const std::string& intf)
{
// Check if there is a iptable filter to drop IPMI packets for the
// interface.
auto retCode =
executeCmd("/usr/sbin/iptables", "-C", "INPUT", "-p", "udp", "-i",
intf.c_str(), "--dport", "623", "-j", "DROP");
// If the iptable filter does not exist, add filter to drop network IPMI
// packets
if (retCode)
{
auto response =
executeCmd("/usr/sbin/iptables", "-I", "INPUT", "-p", "udp", "-i",
intf.c_str(), "--dport", "623", "-j", "DROP");
if (response)
{
log<level::ERR>("Inserting iptables filter failed",
entry("INTF=%s", intf.c_str()),
entry("RETURN_CODE:%d", response));
}
}
}
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