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keys: make latest mkey non-mandatory for older FWs

This commit is contained in:
Pablo Curiel 2024-04-09 02:05:44 +02:00
parent a5e72a45e0
commit 5e333bb92e
2 changed files with 74 additions and 46 deletions
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8
code_templates/nxdt_rw_poc.c
View File

@ -1044,7 +1044,7 @@ int main(int argc, char *argv[])
updateTitleList(&g_systemTitlesMenu, &g_ncaMenu, true);
Menu *cur_menu = &g_rootMenu;
u32 element_count = menuGetElementCount(cur_menu), page_size = 30;
u32 element_count = menuGetElementCount(cur_menu), page_size = 20;
TitleApplicationMetadata *app_metadata = NULL;
@ -6232,7 +6232,7 @@ static void nspThreadFunc(void *arg)
goto end;
}
consolePrint("%s #%u initialize nca ctx succeeded\n", titleGetNcmContentTypeName(content_info->content_type), content_info->id_offset);
consolePrint("%s #%u initialize nca ctx succeeded\n", titleGetNcmContentTypeName(cur_nca_ctx->content_type), cur_nca_ctx->id_offset);
// don't go any further with this nca if we can't access its fs data because it's pointless
if (cur_nca_ctx->rights_id_available && !cur_nca_ctx->titlekey_retrieved && !no_titlekey_confirmation)
@ -6286,7 +6286,7 @@ static void nspThreadFunc(void *arg)
{
case NcmContentType_Program:
{
// don't proceed if we didn't allocate programinfo ctx or if we're dealing with a sparse layer
// don't proceed if we didn't allocate programinfo ctx
if (!program_count || !program_info_ctx) break;
ProgramInfoContext *cur_program_info_ctx = &(program_info_ctx[program_idx]);
@ -6383,7 +6383,7 @@ static void nspThreadFunc(void *arg)
goto end;
}
bool retrieve_tik_cert = (!remove_titlekey_crypto && tik.size > 0);
bool retrieve_tik_cert = (!remove_titlekey_crypto && tikIsValidTicket(&tik));
if (retrieve_tik_cert)
{
if (!(tik_common_block = tikGetCommonBlockFromTicket(&tik)))

112
source/core/keys.c
View File

@ -110,7 +110,8 @@ static bool keysGenerateAesKeyFromAesKek(const u8 *kek_src, u8 key_generation, S
static bool g_keysetLoaded = false;
static Mutex g_keysetMutex = 0;
static u8 g_atmosphereKeyGeneration = 0;
static u8 g_atmosphereKeyGeneration = 0, g_currentMasterKeyIndex = 0;
static bool g_outdatedMasterKeyVectors = false, g_lowMasterKeyRequirement = false;
static SetCalRsa2048DeviceKey g_eTicketRsaDeviceKey = {0};
static KeysNxKeyset g_nxKeyset = {0};
@ -132,6 +133,15 @@ bool keysLoadKeyset(void)
/* This actually represents an index, so we must be careful whenever we use it. */
g_atmosphereKeyGeneration = utilsGetAtmosphereKeyGeneration();
/* Get current master key index. */
g_currentMasterKeyIndex = (NcaKeyGeneration_Current - 1);
/* Determine if our master key vectors are outdated. */
g_outdatedMasterKeyVectors = (g_atmosphereKeyGeneration > g_currentMasterKeyIndex);
/* Determine if we're dealing with a lower master key requirement. */
g_lowMasterKeyRequirement = (g_atmosphereKeyGeneration < g_currentMasterKeyIndex);
/* Get eTicket RSA device key. */
Result rc = setcalGetEticketDeviceKey(&g_eTicketRsaDeviceKey);
if (R_FAILED(rc))
@ -601,8 +611,8 @@ static bool keysReadKeysFromFile(void)
PARSE_HEX_KEY(eticket_rsa_kek_name, g_nxKeyset.eticket_rsa_kek, eticket_rsa_kek_available = true; continue);
}
/* Parse master keys, starting with the last known one. */
for(u8 i = (NcaKeyGeneration_Current - 1); i < NcaKeyGeneration_Max; i++)
/* Parse master keys, starting with the minimum required one (if dealing with a lower master key requirement) or the last known one. */
for(u8 i = (g_lowMasterKeyRequirement ? g_atmosphereKeyGeneration : g_currentMasterKeyIndex); i < NcaKeyGeneration_Max; i++)
{
PARSE_HEX_KEY_WITH_INDEX("master_key", i, g_nxKeyset.master_keys[i], break);
}
@ -637,86 +647,104 @@ static bool keysReadKeysFromFile(void)
static bool keysDeriveMasterKeys(void)
{
u8 tmp[AES_128_KEY_SIZE] = {0};
const u8 current_mkey_index = (NcaKeyGeneration_Current - 1); // Convert into an index.
const bool is_dev = utilsIsDevelopmentUnit(), is_mariko = utilsIsMarikoUnit(), outdated_mkey_vectors = (g_atmosphereKeyGeneration > current_mkey_index);
bool latest_mkey_available = false;
u8 tmp[AES_128_KEY_SIZE] = {0}, current_mkey_index = g_currentMasterKeyIndex;
const bool is_dev = utilsIsDevelopmentUnit(), is_mariko = utilsIsMarikoUnit();
bool current_mkey_available = false;
/* Check if the latest master key was retrieved. */
if (outdated_mkey_vectors)
if (current_mkey_index != g_atmosphereKeyGeneration) LOG_MSG_WARNING("Current key generation mismatch detected (%02X != %02X).", current_mkey_index, g_atmosphereKeyGeneration);
if (g_outdatedMasterKeyVectors)
{
/* Our master key vectors are outdated. */
/* This means the user is running both a HOS version with a newer key generation and an Atmosphère release with support for said HOS version. */
/* This means the user is running both a HOS version with a newer master key generation and an Atmosphère release with support for said HOS version. */
/* Not everything is lost, though. We just need to check if we parsed all master keys between the last one we know and the one Atmosphère supports (inclusive range). */
/* However, since we have no master key vectors for the additional master key(s), we can't reliably test them. */
latest_mkey_available = true;
current_mkey_available = true;
for(u8 i = current_mkey_index; i <= g_atmosphereKeyGeneration; i++)
{
if (keysIsKeyEmpty(g_nxKeyset.master_keys[i]))
{
latest_mkey_available = false;
current_mkey_available = false;
break;
}
}
} else {
/* Our master key vectors are up-to-date. */
/* Just checking if we have the latest known master key should suffice. */
latest_mkey_available = !keysIsKeyEmpty(g_nxKeyset.master_keys[current_mkey_index]);
}
/* Only derive the latest master key if it hasn't been populated already. */
if (!latest_mkey_available)
{
/* Bail out immediately if our master key vectors are outdated. */
if (outdated_mkey_vectors)
/* Bail out immediately if the newer master keys are unavailable. */
if (!current_mkey_available)
{
LOG_MSG_ERROR("Unable to derive master keys.\r\n" \
"PKG1 key generation (%02X) is higher than the last known key generation (%02X).\r\n" \
"Furthermore, one or more of the newer master keys are not available in the keys\r\n" \
"file. If you haven't already, please get an updated build at:\r\n%s\r\n%s", \
LOG_MSG_ERROR("PKG1 key generation (%02X) is higher than the last known\r\n" \
"key generation (%02X). Furthermore, one or more of the newer master keys are not\r\n" \
"available in the keys file. Please redump your console keys and get an updated\r\n" \
APP_TITLE " build before trying again. You can get newer builds at:\r\n%s\r\n%s", \
g_atmosphereKeyGeneration, current_mkey_index, PRERELEASE_URL, DISCORD_SERVER_URL);
return false;
}
} else {
/* Our master key vectors are up-to-date. */
/* However, we may also be running under a console with an older HOS version and a lower master key generation. */
/* If this is the case, we'll need to adjust the current master key index to match Atmosphére's key generation value. */
/* There really is no point in demanding the most up-to-date master key under lower firmware versions. */
if (g_lowMasterKeyRequirement) current_mkey_index = g_atmosphereKeyGeneration;
LOG_MSG_WARNING("Latest known master key (%02X) unavailable. Latest master key derivation will be carried out.", current_mkey_index);
/* Now then, just checking if we have the current master key should suffice. */
current_mkey_available = !keysIsKeyEmpty(g_nxKeyset.master_keys[current_mkey_index]);
/* Derive the latest master KEK. */
/* Bail out if we're dealing with a lower master key generation and we don't have its master key. */
/* This is because current master key derivation depends on generation-specific master KEKs, and we only hardcode the last known one. */
if (!current_mkey_available && g_lowMasterKeyRequirement)
{
LOG_MSG_ERROR("\"master_key_%02x\" unavailable! Unable to derive lower\r\n" \
"master keys. Please redump your console keys and try again.", current_mkey_index);
return false;
}
}
/* Derive current master key if it's not populated. */
/* We should only enter this conditional block if Atmosphère's key generation matches our last known master key generation. */
if (!current_mkey_available)
{
LOG_MSG_WARNING("Current master key (%02X) unavailable. It will be derived.", current_mkey_index);
/* Derive the current master KEK. */
if (is_mariko)
{
if (!g_marikoKekAvailable)
{
LOG_MSG_ERROR("\"mariko_kek\" unavailable! Unable to derive master keys.");
LOG_MSG_ERROR("\"mariko_kek\" unavailable! Unable to derive current\r\n" \
"master key. You may need to manually derive it using PartialAesKeyCrack,\r\n" \
"and/or redump your console keys. Please try again afterwards.");
return false;
}
/* Derive the latest master KEK using the hardcoded Mariko master KEK source and the Mariko KEK. */
/* Derive the current master KEK using the hardcoded Mariko master KEK source and the Mariko KEK. */
aes128EcbCrypt(tmp, is_dev ? g_marikoMasterKekSourceDev : g_marikoMasterKekSourceProd, g_nxKeyset.mariko_kek, false);
} else {
if (!g_tsecRootKeyAvailable)
{
LOG_MSG_ERROR("\"tsec_root_key_%02X\" unavailable! Unable to derive master keys.", TSEC_ROOT_KEY_VERSION);
LOG_MSG_ERROR("\"tsec_root_key_%02x\" unavailable! Unable to derive\r\n" \
"current master key. Please redump your console keys and try again.", TSEC_ROOT_KEY_VERSION);
return false;
}
/* Derive the latest master KEK using the hardcoded Erista master KEK source and the TSEC root key. */
/* Derive the current master KEK using the hardcoded Erista master KEK source and the TSEC root key. */
aes128EcbCrypt(tmp, g_eristaMasterKekSource, g_nxKeyset.tsec_root_key, false);
}
/* Derive the latest master key using the hardcoded master key source and the latest master KEK. */
/* Derive the current master key using the hardcoded master key source and the current master KEK. */
aes128EcbCrypt(g_nxKeyset.master_keys[current_mkey_index], g_masterKeySource, tmp, false);
}
/* Derive all lower master keys using the latest master key and the master key vectors. */
for(u8 i = current_mkey_index; i > NcaKeyGeneration_Since100NUP; i--) aes128EcbCrypt(g_nxKeyset.master_keys[i - 1], is_dev ? g_masterKeyVectorsDev[i] : g_masterKeyVectorsProd[i], \
g_nxKeyset.master_keys[i], false);
/* Derive all lower master keys using the current master key and the master key vectors. */
for(u8 i = current_mkey_index; i > 0; i--) aes128EcbCrypt(g_nxKeyset.master_keys[i - 1], is_dev ? g_masterKeyVectorsDev[i] : g_masterKeyVectorsProd[i], \
g_nxKeyset.master_keys[i], false);
/* Check if we derived the right keys. */
aes128EcbCrypt(tmp, is_dev ? g_masterKeyVectorsDev[NcaKeyGeneration_Since100NUP] : g_masterKeyVectorsProd[NcaKeyGeneration_Since100NUP], \
g_nxKeyset.master_keys[NcaKeyGeneration_Since100NUP], false);
aes128EcbCrypt(tmp, is_dev ? g_masterKeyVectorsDev[0] : g_masterKeyVectorsProd[0], g_nxKeyset.master_keys[0], false);
bool ret = keysIsKeyEmpty(tmp);
if (!ret) LOG_MSG_ERROR("Master key derivation failed! Wrong keys?");
if (!ret) LOG_MSG_ERROR("Derivation of %u lower master key(s) failed! Wrong keys?\r\n" \
"Please redump your console keys and try again.", current_mkey_index);
return ret;
}
@ -764,9 +792,9 @@ static bool keysDerivePerGenerationKeys(void)
const u8 mkey_index = (i - 1);
/* Make sure we're not dealing with an unpopulated master key entry. */
if (i > NcaKeyGeneration_Current && keysIsKeyEmpty(g_nxKeyset.master_keys[mkey_index]))
if (keysIsKeyEmpty(g_nxKeyset.master_keys[mkey_index]))
{
//LOG_MSG_DEBUG("\"master_key_%02X\" unavailable.", mkey_index);
//LOG_MSG_DEBUG("\"master_key_%02x\" unavailable.", mkey_index);
continue;
}
@ -893,7 +921,7 @@ static bool keysGenerateAesKek(const u8 *kek_src, u8 key_generation, SmcGenerate
/* Make sure this master key is available. */
if (keysIsKeyEmpty(mkey))
{
LOG_MSG_ERROR("\"master_key_%02X\" unavailable!", mkey_index);
LOG_MSG_ERROR("\"master_key_%02x\" unavailable!", mkey_index);
return false;
}