Tom Joseph | 50fb50a | 2016-12-06 17:51:06 +0530 | [diff] [blame] | 1 | #include "rakp34.hpp" |
| 2 | |
| 3 | #include <algorithm> |
| 4 | #include <cstring> |
| 5 | #include <iostream> |
| 6 | |
| 7 | #include "comm_module.hpp" |
| 8 | #include "endian.hpp" |
| 9 | #include "guid.hpp" |
| 10 | #include "main.hpp" |
| 11 | |
| 12 | namespace command |
| 13 | { |
| 14 | |
Tom Joseph | ef02fb3 | 2017-01-19 12:55:11 +0530 | [diff] [blame^] | 15 | void applyIntegrityAlgo(const uint32_t bmcSessionID) |
| 16 | { |
| 17 | auto session = (std::get<session::Manager&>(singletonPool).getSession( |
| 18 | bmcSessionID)).lock(); |
| 19 | |
| 20 | auto authAlgo = session->getAuthAlgo(); |
| 21 | |
| 22 | switch (authAlgo->intAlgo) |
| 23 | { |
| 24 | case cipher::integrity::Algorithms::HMAC_SHA1_96: |
| 25 | { |
| 26 | session->setIntegrityAlgo( |
| 27 | std::make_unique<cipher::integrity::AlgoSHA1>( |
| 28 | authAlgo->sessionIntegrityKey)); |
| 29 | break; |
| 30 | } |
| 31 | default: |
| 32 | break; |
| 33 | } |
| 34 | } |
| 35 | |
Tom Joseph | 50fb50a | 2016-12-06 17:51:06 +0530 | [diff] [blame] | 36 | std::vector<uint8_t> RAKP34(std::vector<uint8_t>& inPayload, |
| 37 | const message::Handler& handler) |
| 38 | { |
| 39 | std::cout << ">> RAKP34\n"; |
| 40 | |
| 41 | std::vector<uint8_t> outPayload(sizeof(RAKP4response)); |
| 42 | auto request = reinterpret_cast<RAKP3request*>(inPayload.data()); |
| 43 | auto response = reinterpret_cast<RAKP4response*>(outPayload.data()); |
| 44 | |
| 45 | // Check if the RAKP3 Payload Length is as expected |
| 46 | if(inPayload.size() != sizeof(RAKP3request)) |
| 47 | { |
| 48 | std::cerr << "RAKP34: Invalid RAKP3 request\n"; |
| 49 | response->rmcpStatusCode = |
| 50 | static_cast<uint8_t>(RAKP_ReturnCode::INVALID_INTEGRITY_VALUE); |
| 51 | return outPayload; |
| 52 | } |
| 53 | |
| 54 | // Session ID zero is reserved for Session Setup |
| 55 | if(endian::from_ipmi(request->managedSystemSessionID) == |
| 56 | session::SESSION_ZERO) |
| 57 | { |
| 58 | std::cerr << "RAKP34: BMC invalid Session ID\n"; |
| 59 | response->rmcpStatusCode = |
| 60 | static_cast<uint8_t>(RAKP_ReturnCode::INVALID_SESSION_ID); |
| 61 | return outPayload; |
| 62 | } |
| 63 | |
| 64 | std::shared_ptr<session::Session> session; |
| 65 | try |
| 66 | { |
| 67 | session = (std::get<session::Manager&>(singletonPool).getSession( |
| 68 | endian::from_ipmi(request->managedSystemSessionID))).lock(); |
| 69 | } |
| 70 | catch (std::exception& e) |
| 71 | { |
| 72 | std::cerr << e.what() << "\n"; |
| 73 | response->rmcpStatusCode = |
| 74 | static_cast<uint8_t>(RAKP_ReturnCode::INVALID_SESSION_ID); |
| 75 | return outPayload; |
| 76 | } |
| 77 | |
| 78 | session->updateLastTransactionTime(); |
| 79 | |
| 80 | auto authAlgo = session->getAuthAlgo(); |
| 81 | /* |
| 82 | * Key Authentication Code - RAKP 3 |
| 83 | * |
| 84 | * 1) Managed System Random Number - 16 bytes |
| 85 | * 2) Remote Console Session ID - 4 bytes |
| 86 | * 3) Session Privilege Level - 1 byte |
| 87 | * 4) User Name Length Byte - 1 byte (0 for 'null' username) |
| 88 | * 5) User Name - variable (absent for 'null' username) |
| 89 | */ |
| 90 | |
| 91 | // Remote Console Session ID |
| 92 | auto rcSessionID = endian::to_ipmi(session->getRCSessionID()); |
| 93 | |
| 94 | // Session Privilege Level |
| 95 | auto sessPrivLevel = static_cast<uint8_t>(session->curPrivLevel); |
| 96 | |
| 97 | // User Name Length Byte |
| 98 | uint8_t userLength = 0; |
| 99 | |
| 100 | std::vector<uint8_t> input; |
| 101 | input.resize(cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN + |
| 102 | sizeof(rcSessionID) + sizeof(sessPrivLevel) + |
| 103 | sizeof(userLength)); |
| 104 | |
| 105 | auto iter = input.begin(); |
| 106 | |
| 107 | // Managed System Random Number |
| 108 | std::copy(authAlgo->bmcRandomNum.begin(), authAlgo->bmcRandomNum.end(), |
| 109 | iter); |
| 110 | std::advance(iter, cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN); |
| 111 | |
| 112 | // Remote Console Session ID |
| 113 | std::copy_n(reinterpret_cast<uint8_t*>(&rcSessionID), sizeof(rcSessionID), |
| 114 | iter); |
| 115 | std::advance(iter, sizeof(rcSessionID)); |
| 116 | |
| 117 | // Session Privilege Level |
| 118 | std::copy_n(reinterpret_cast<uint8_t*>(&sessPrivLevel), |
| 119 | sizeof(sessPrivLevel), iter); |
| 120 | std::advance(iter, sizeof(sessPrivLevel)); |
| 121 | |
| 122 | // User Name Length Byte |
| 123 | std::copy_n(&userLength, sizeof(userLength), iter); |
| 124 | |
| 125 | // Generate Key Exchange Authentication Code - RAKP2 |
| 126 | auto output = authAlgo->generateHMAC(input); |
| 127 | |
| 128 | if (std::memcmp(output.data(), request->keyExchangeAuthCode, |
| 129 | output.size())) |
| 130 | { |
| 131 | std::cerr << "Mismatch in HMAC sent by remote console\n"; |
| 132 | |
| 133 | response->messageTag = request->messageTag; |
| 134 | response->rmcpStatusCode = static_cast<uint8_t> |
| 135 | (RAKP_ReturnCode::INVALID_INTEGRITY_VALUE); |
| 136 | response->reserved = 0; |
| 137 | response->remoteConsoleSessionID = rcSessionID; |
| 138 | |
| 139 | //close the session |
| 140 | std::get<session::Manager&>(singletonPool).stopSession( |
| 141 | session->getBMCSessionID()); |
| 142 | |
| 143 | return outPayload; |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Session Integrity Key |
| 148 | * |
| 149 | * 1) Remote Console Random Number - 16 bytes |
| 150 | * 2) Managed System Random Number - 16 bytes |
| 151 | * 3) Session Privilege Level - 1 byte |
| 152 | * 4) User Name Length Byte - 1 byte (0 for 'null' username) |
| 153 | * 5) User Name - variable (absent for 'null' username) |
| 154 | */ |
| 155 | |
| 156 | input.clear(); |
| 157 | |
| 158 | input.resize(cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN + |
| 159 | cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN + |
| 160 | sizeof(sessPrivLevel) + sizeof(userLength)); |
| 161 | iter = input.begin(); |
| 162 | |
| 163 | // Remote Console Random Number |
| 164 | std::copy(authAlgo->rcRandomNum.begin(), authAlgo->rcRandomNum.end(), |
| 165 | iter); |
| 166 | std::advance(iter, cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN); |
| 167 | |
| 168 | // Managed Console Random Number |
| 169 | std::copy(authAlgo->bmcRandomNum.begin(), authAlgo->bmcRandomNum.end(), |
| 170 | iter); |
| 171 | std::advance(iter, cipher::rakp_auth::BMC_RANDOM_NUMBER_LEN); |
| 172 | |
| 173 | // Session Privilege Level |
| 174 | std::copy_n(reinterpret_cast<uint8_t*>(&sessPrivLevel), |
| 175 | sizeof(sessPrivLevel), iter); |
| 176 | std::advance(iter, sizeof(sessPrivLevel)); |
| 177 | |
| 178 | // User Name Length Byte |
| 179 | std::copy_n(&userLength, sizeof(userLength), iter); |
| 180 | |
| 181 | // Generate Session Integrity Key |
| 182 | auto sikOutput = authAlgo->generateHMAC(input); |
| 183 | |
| 184 | // Update the SIK in the Authentication Algo Interface |
| 185 | authAlgo->sessionIntegrityKey.insert(authAlgo->sessionIntegrityKey.begin(), |
| 186 | sikOutput.begin(), sikOutput.end()); |
| 187 | |
| 188 | /* |
| 189 | * Integrity Check Value |
| 190 | * |
| 191 | * 1) Remote Console Random Number - 16 bytes |
| 192 | * 2) Managed System Session ID - 4 bytes |
| 193 | * 3) Managed System GUID - 16 bytes |
| 194 | */ |
| 195 | |
| 196 | // Get Managed System Session ID |
| 197 | auto bmcSessionID = endian::to_ipmi(session->getBMCSessionID()); |
| 198 | |
| 199 | input.clear(); |
| 200 | |
| 201 | input.resize(cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN + |
| 202 | sizeof(bmcSessionID) + BMC_GUID_LEN); |
| 203 | iter = input.begin(); |
| 204 | |
| 205 | // Remote Console Random Number |
| 206 | std::copy(authAlgo->rcRandomNum.begin(), authAlgo->rcRandomNum.end(), |
| 207 | iter); |
| 208 | std::advance(iter, cipher::rakp_auth::REMOTE_CONSOLE_RANDOM_NUMBER_LEN); |
| 209 | |
| 210 | // Managed System Session ID |
| 211 | std::copy_n(reinterpret_cast<uint8_t*>(&bmcSessionID), sizeof(bmcSessionID), |
| 212 | iter); |
| 213 | std::advance(iter, sizeof(bmcSessionID)); |
| 214 | |
| 215 | // Managed System GUID |
| 216 | auto guid = getSystemGUID(); |
| 217 | std::copy_n(guid.data(), guid.size(), iter); |
| 218 | |
| 219 | // Integrity Check Value |
| 220 | auto icv = authAlgo->generateICV(input); |
| 221 | |
| 222 | outPayload.resize(sizeof(RAKP4response)); |
| 223 | |
| 224 | response->messageTag = request->messageTag; |
| 225 | response->rmcpStatusCode = static_cast<uint8_t>(RAKP_ReturnCode::NO_ERROR); |
| 226 | response->reserved = 0; |
| 227 | response->remoteConsoleSessionID = rcSessionID; |
| 228 | |
| 229 | // Insert the HMAC output into the payload |
| 230 | outPayload.insert(outPayload.end(), icv.begin(), icv.end()); |
| 231 | |
Tom Joseph | ef02fb3 | 2017-01-19 12:55:11 +0530 | [diff] [blame^] | 232 | // Set the Integrity Algorithm |
| 233 | applyIntegrityAlgo(session->getBMCSessionID()); |
Tom Joseph | 818d070 | 2017-01-10 16:39:38 +0530 | [diff] [blame] | 234 | |
Tom Joseph | 50fb50a | 2016-12-06 17:51:06 +0530 | [diff] [blame] | 235 | session->state = session::State::ACTIVE; |
| 236 | |
| 237 | std::cout << "<< RAKP34\n"; |
| 238 | return outPayload; |
| 239 | } |
| 240 | |
| 241 | } // namespace command |