blob: e83ad95b36544cbee992a6d4be673ad3c44d7ab4 [file] [log] [blame]
#include "channel_auth.hpp"
#include <ipmid/api.h>
#include <ipmid/types.hpp>
#include <ipmid/utils.hpp>
#include <nlohmann/json.hpp>
#include <phosphor-logging/elog-errors.hpp>
#include <phosphor-logging/log.hpp>
#include <user_channel/channel_layer.hpp>
#include <user_channel/user_layer.hpp>
#include <xyz/openbmc_project/Common/error.hpp>
#include <fstream>
#include <set>
#include <string>
namespace command
{
using namespace phosphor::logging;
using namespace sdbusplus::xyz::openbmc_project::Common::Error;
using Json = nlohmann::json;
std::vector<uint8_t>
GetChannelCapabilities(const std::vector<uint8_t>& inPayload,
std::shared_ptr<message::Handler>& handler)
{
auto request =
reinterpret_cast<const GetChannelCapabilitiesReq*>(inPayload.data());
if (inPayload.size() != sizeof(*request))
{
std::vector<uint8_t> errorPayload{IPMI_CC_REQ_DATA_LEN_INVALID};
return errorPayload;
}
constexpr unsigned int channelMask = 0x0f;
uint8_t chNum = ipmi::convertCurrentChannelNum(
request->channelNumber & channelMask, getInterfaceIndex());
if (!ipmi::isValidChannel(chNum) ||
(ipmi::EChannelSessSupported::none ==
ipmi::getChannelSessionSupport(chNum)) ||
!ipmi::isValidPrivLimit(request->reqMaxPrivLevel))
{
std::vector<uint8_t> errorPayload{IPMI_CC_INVALID_FIELD_REQUEST};
return errorPayload;
}
std::vector<uint8_t> outPayload(sizeof(GetChannelCapabilitiesResp));
auto response =
reinterpret_cast<GetChannelCapabilitiesResp*>(outPayload.data());
// A canned response, since there is no user and channel management.
response->completionCode = IPMI_CC_OK;
response->channelNumber = chNum;
response->ipmiVersion = 1; // IPMI v2.0 extended capabilities available.
response->reserved1 = 0;
response->oem = 0;
response->straightKey = 0;
response->reserved2 = 0;
response->md5 = 0;
response->md2 = 0;
response->reserved3 = 0;
response->KGStatus = 0; // KG is set to default
response->perMessageAuth = 0; // Per-message Authentication is enabled
response->userAuth = 0; // User Level Authentication is enabled
uint8_t maxChUsers = 0;
uint8_t enabledUsers = 0;
uint8_t fixedUsers = 0;
ipmi::ipmiUserGetAllCounts(maxChUsers, enabledUsers, fixedUsers);
response->nonNullUsers = enabledUsers > 0 ? 1 : 0; // Non-null usernames
response->nullUsers = 0; // Null usernames disabled
response->anonymousLogin = 0; // Anonymous Login disabled
response->reserved4 = 0;
response->extCapabilities = 0x2; // Channel supports IPMI v2.0 connections
response->oemID[0] = 0;
response->oemID[1] = 0;
response->oemID[2] = 0;
response->oemAuxillary = 0;
return outPayload;
}
static constexpr const char* configFile =
"/usr/share/ipmi-providers/cipher_list.json";
static constexpr const char* cipher = "cipher";
static constexpr uint8_t stdCipherSuite = 0xC0;
static constexpr uint8_t oemCipherSuite = 0xC1;
static constexpr const char* oem = "oemiana";
static constexpr const char* auth = "authentication";
static constexpr const char* integrity = "integrity";
static constexpr uint8_t integrityTag = 0x40;
static constexpr const char* conf = "confidentiality";
static constexpr uint8_t confTag = 0x80;
/** @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
*
*/
static 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);
}
/** @brief this command is used to look up what authentication, integrity,
* confidentiality algorithms are supported.
*
* @ param inPayload - vector of input data
* @ param handler - pointer to handler
*
* @returns ipmi completion code plus response data
* - vector of response data: cc, channel, record data
**/
std::vector<uint8_t>
getChannelCipherSuites(const std::vector<uint8_t>& inPayload,
std::shared_ptr<message::Handler>& handler)
{
const auto errorResponse = [](uint8_t cc) {
std::vector<uint8_t> rsp(1);
rsp[0] = cc;
return rsp;
};
static constexpr size_t getChannelCipherSuitesReqLen = 3;
if (inPayload.size() != getChannelCipherSuitesReqLen)
{
return errorResponse(IPMI_CC_REQ_DATA_LEN_INVALID);
}
static constexpr uint8_t channelMask = 0x0f;
uint8_t channelNumber = inPayload[0] & channelMask;
if (channelNumber != inPayload[0])
{
return errorResponse(IPMI_CC_INVALID_FIELD_REQUEST);
}
static constexpr uint8_t payloadMask = 0x3f;
uint8_t payloadType = inPayload[1] & payloadMask;
if (payloadType != inPayload[1])
{
return errorResponse(IPMI_CC_INVALID_FIELD_REQUEST);
}
static constexpr uint8_t indexMask = 0x3f;
uint8_t listIndex = inPayload[2] & indexMask;
static constexpr uint8_t algoSelectShift = 7;
uint8_t algoSelectBit = inPayload[2] >> algoSelectShift;
if ((listIndex | (algoSelectBit << algoSelectShift)) != inPayload[2])
{
return errorResponse(IPMI_CC_INVALID_FIELD_REQUEST);
}
static std::vector<uint8_t> cipherRecords;
static std::vector<uint8_t> supportedAlgorithms;
static bool recordInit = false;
uint8_t rspChannel =
ipmi::convertCurrentChannelNum(channelNumber, getInterfaceIndex());
if (!ipmi::isValidChannel(rspChannel))
{
return errorResponse(IPMI_CC_INVALID_FIELD_REQUEST);
}
if (!ipmi::isValidPayloadType(static_cast<ipmi::PayloadType>(payloadType)))
{
log<level::DEBUG>("Get channel cipher suites - Invalid payload type");
constexpr uint8_t ccPayloadTypeNotSupported = 0x80;
return errorResponse(ccPayloadTypeNotSupported);
}
if (!recordInit)
{
try
{
std::tie(cipherRecords, supportedAlgorithms) = getCipherRecords();
recordInit = true;
}
catch (const std::exception& e)
{
return errorResponse(IPMI_CC_UNSPECIFIED_ERROR);
}
}
const std::vector<uint8_t>& records =
algoSelectBit ? cipherRecords : supportedAlgorithms;
static constexpr auto respSize = 16;
// Session support is available in active LAN channels.
if ((ipmi::getChannelSessionSupport(rspChannel) ==
ipmi::EChannelSessSupported::none) ||
!(ipmi::doesDeviceExist(rspChannel)))
{
log<level::DEBUG>("Get channel cipher suites - Device does not exist");
return errorResponse(IPMI_CC_INVALID_FIELD_REQUEST);
}
// List index(00h-3Fh), 0h selects the first set of 16, 1h selects the next
// set of 16 and so on.
// Calculate the number of record data bytes to be returned.
auto start =
std::min(static_cast<size_t>(listIndex) * respSize, records.size());
auto end = std::min((static_cast<size_t>(listIndex) * respSize) + respSize,
records.size());
auto size = end - start;
std::vector<uint8_t> rsp;
rsp.push_back(IPMI_CC_OK);
rsp.push_back(rspChannel);
std::copy_n(records.data() + start, size, std::back_inserter(rsp));
return rsp;
}
} // namespace command