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keys: implement NCA KAEK and titlekek validation.

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Keyslots beyond the hardcoded "current" one won't be validated.
This commit is contained in:
Pablo Curiel 2022-09-13 02:22:15 +02:00
parent 7bb708e394
commit 5be5a7b16d
2 changed files with 116 additions and 29 deletions
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1
include/core/nca.h
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@ -75,6 +75,7 @@ typedef enum {
} NcaContentType;
/// 'NcaKeyGeneration_Current' will always point to the last known key generation value.
/// TODO: update on master key changes.
typedef enum {
NcaKeyGeneration_Since100NUP = 0, ///< 1.0.0 - 2.3.0.
NcaKeyGeneration_Since300NUP = 2, ///< 3.0.0.

138
source/core/keys.c
View file

@ -62,26 +62,17 @@ typedef struct {
u8 nca_kaek_sources[NcaKeyAreaEncryptionKeyIndex_Count][AES_128_KEY_SIZE]; ///< Retrieved from the .rodata segment in the FS sysmodule.
u8 nca_kaek_sealed[NcaKeyAreaEncryptionKeyIndex_Count][NcaKeyGeneration_Max][AES_128_KEY_SIZE]; ///< Generated from nca_kaek_sources. Sealed by the SMC AES engine.
u8 nca_kaek[NcaKeyAreaEncryptionKeyIndex_Count][NcaKeyGeneration_Max][AES_128_KEY_SIZE]; ///< Unsealed key area encryption keys. Retrieved from the Lockpick_RCM keys file.
///< Verified using a hardcoded hash.
///< AES-128-CTR key needed to decrypt the console-specific eTicket RSA device key stored in PRODINFO.
///< Verified by decrypting the eTicket RSA device key.
u8 eticket_rsa_kek[AES_128_KEY_SIZE]; ///< eTicket RSA key encryption key (generic). Retrieved from the Lockpick_RCM keys file.
u8 eticket_rsa_kek_personalized[AES_128_KEY_SIZE]; ///< eTicket RSA key encryption key (console-specific). Retrieved from the Lockpick_RCM keys file.
///< AES-128-ECB keys needed to decrypt titlekeys.
u8 ticket_common_keys[NcaKeyGeneration_Max][AES_128_KEY_SIZE]; ///< Retrieved from the Lockpick_RCM keys file.
u8 ticket_common_keys[NcaKeyGeneration_Max][AES_128_KEY_SIZE]; ///< Retrieved from the Lockpick_RCM keys file. Verified using a hardcoded hash.
} KeysNcaKeyset;
typedef struct {
/// AES-128-CBC keys needed to decrypt the CardInfo area from gamecard headers.
const u8 gc_cardinfo_kek_source[AES_128_KEY_SIZE]; ///< Randomly generated KEK source to decrypt official CardInfo area keys.
const u8 gc_cardinfo_key_prod_source[AES_128_KEY_SIZE]; ///< CardInfo area key used in retail units. Obfuscated using the above KEK source and SMC AES engine keydata.
const u8 gc_cardinfo_key_dev_source[AES_128_KEY_SIZE]; ///< CardInfo area key used in development units. Obfuscated using the above KEK source and SMC AES engine keydata.
u8 gc_cardinfo_kek_sealed[AES_128_KEY_SIZE]; ///< Generated from gc_cardinfo_kek_source. Sealed by the SMC AES engine.
u8 gc_cardinfo_key_prod[AES_128_KEY_SIZE]; ///< Generated from gc_cardinfo_kek_sealed and gc_cardinfo_key_prod_source.
u8 gc_cardinfo_key_dev[AES_128_KEY_SIZE]; ///< Generated from gc_cardinfo_kek_sealed and gc_cardinfo_key_dev_source.
} KeysGameCardKeyset;
/// Used to parse the eTicket RSA device key retrieved from PRODINFO via setcalGetEticketDeviceKey().
/// Everything after the AES CTR is encrypted using the eTicket RSA device key encryption key.
typedef struct {
@ -96,6 +87,17 @@ typedef struct {
NXDT_ASSERT(EticketRsaDeviceKey, 0x240);
/// AES-128-CBC keys needed to decrypt the CardInfo area from gamecard headers.
typedef struct {
const u8 gc_cardinfo_kek_source[AES_128_KEY_SIZE]; ///< Randomly generated KEK source to decrypt official CardInfo area keys.
const u8 gc_cardinfo_key_prod_source[AES_128_KEY_SIZE]; ///< CardInfo area key used in retail units. Obfuscated using the above KEK source and SMC AES engine keydata.
const u8 gc_cardinfo_key_dev_source[AES_128_KEY_SIZE]; ///< CardInfo area key used in development units. Obfuscated using the above KEK source and SMC AES engine keydata.
u8 gc_cardinfo_kek_sealed[AES_128_KEY_SIZE]; ///< Generated from gc_cardinfo_kek_source. Sealed by the SMC AES engine.
u8 gc_cardinfo_key_prod[AES_128_KEY_SIZE]; ///< Generated from gc_cardinfo_kek_sealed and gc_cardinfo_key_prod_source.
u8 gc_cardinfo_key_dev[AES_128_KEY_SIZE]; ///< Generated from gc_cardinfo_kek_sealed and gc_cardinfo_key_dev_source.
} KeysGameCardKeyset;
/* Function prototypes. */
static bool keysIsProductionModulus1xMandatory(void);
@ -114,6 +116,8 @@ static char keysConvertHexDigitToBinary(char c);
static bool keysParseHexKey(u8 *out, const char *key, const char *value, u32 size);
static bool keysReadKeysFromFile(void);
static bool keysVerifyLockpickRcmData(void);
static bool keysGetDecryptedEticketRsaDeviceKey(void);
static bool keysTestEticketRsaDeviceKey(const void *e, const void *d, const void *n);
@ -121,20 +125,65 @@ static bool keysDeriveGameCardKeys(void);
/* Global variables. */
static KeysNcaKeyset g_ncaKeyset = {0};
static KeysGameCardKeyset g_gameCardKeyset = {
.gc_cardinfo_kek_source = { 0xDE, 0xC6, 0x3F, 0x6A, 0xBF, 0x37, 0x72, 0x0B, 0x7E, 0x54, 0x67, 0x6A, 0x2D, 0xEF, 0xDD, 0x97 },
.gc_cardinfo_key_prod_source = { 0xF4, 0x92, 0x06, 0x52, 0xD6, 0x37, 0x70, 0xAF, 0xB1, 0x9C, 0x6F, 0x63, 0x09, 0x01, 0xF6, 0x29 },
.gc_cardinfo_key_dev_source = { 0x0B, 0x7D, 0xBB, 0x2C, 0xCF, 0x64, 0x1A, 0xF4, 0xD7, 0x38, 0x81, 0x3F, 0x0C, 0x33, 0xF4, 0x1C },
.gc_cardinfo_kek_sealed = {0},
.gc_cardinfo_key_prod = {0},
.gc_cardinfo_key_dev = {0}
};
static bool g_keysetLoaded = false;
static Mutex g_keysetMutex = 0;
static KeysNcaKeyset g_ncaKeyset = {0};
/// TODO: update on master key changes.
static const u8 g_ncaKaekBlockHashes[2][NcaKeyAreaEncryptionKeyIndex_Count][SHA256_HASH_SIZE] = {
/* Production. */
{
/* Application. */
{
0x25, 0xDB, 0xC7, 0xB0, 0x55, 0x05, 0x46, 0xAF, 0xDA, 0xA0, 0xEE, 0xA8, 0x85, 0x3D, 0x7E, 0x3D,
0x33, 0xD3, 0x5D, 0x86, 0x2C, 0xA7, 0x18, 0x2C, 0x83, 0xBB, 0x81, 0x79, 0xFC, 0x47, 0x91, 0x63
},
/* Ocean. */
{
0x58, 0x00, 0x85, 0xA9, 0xE5, 0x2B, 0x3C, 0x50, 0xDB, 0x3A, 0x9F, 0xF2, 0x56, 0x61, 0xC2, 0x35,
0x0C, 0xAB, 0xE8, 0xC2, 0x9B, 0x03, 0x0E, 0x2E, 0xDD, 0xF4, 0xC7, 0x5E, 0x7E, 0x1B, 0x7D, 0x06
},
/* System. */
{
0xB4, 0x11, 0x6E, 0x5D, 0xF6, 0x09, 0x72, 0x04, 0x0D, 0xCD, 0xEE, 0x8D, 0x74, 0x2D, 0x51, 0x1A,
0xA1, 0x10, 0xA4, 0xFC, 0x0E, 0x2D, 0x6C, 0x0C, 0x85, 0x98, 0x62, 0x1F, 0x7A, 0x6F, 0x31, 0xD6
}
},
/* Development. */
{
/* Application. */
{
0xD9, 0xBC, 0x7E, 0x09, 0xFD, 0x46, 0x43, 0xB7, 0x05, 0x5E, 0xAD, 0x60, 0x2A, 0xE4, 0x5B, 0xBC,
0xA1, 0x6E, 0xB0, 0x93, 0x8C, 0x51, 0x0E, 0x93, 0x19, 0xE7, 0xD6, 0x00, 0x82, 0xEF, 0xCA, 0x85
},
/* Ocean. */
{
0x0F, 0xF6, 0x5E, 0xEC, 0xB9, 0x21, 0x7C, 0x66, 0x27, 0xBA, 0xBA, 0x18, 0xAF, 0x95, 0x3A, 0xEA,
0x77, 0xA7, 0x43, 0x8F, 0xA3, 0x2B, 0x40, 0x85, 0xE8, 0x67, 0x4A, 0x28, 0xFF, 0xAE, 0x1D, 0xD5
},
/* System. */
{
0x49, 0x63, 0x92, 0xE4, 0x97, 0x34, 0x9B, 0x78, 0x33, 0x73, 0x71, 0x84, 0xC4, 0x96, 0xBB, 0xE6,
0x78, 0xD7, 0x4B, 0x31, 0xC1, 0x01, 0xA6, 0xB5, 0x8B, 0xC2, 0x26, 0x2D, 0xD0, 0x5E, 0xB5, 0xEE
}
}
};
/// TODO: update on master key changes.
static const u8 g_ticketCommonKeysBlockHashes[2][SHA256_HASH_SIZE] = {
/* Production. */
{
0x26, 0xBC, 0x1F, 0x28, 0x06, 0x7E, 0x38, 0xF0, 0xBA, 0x3F, 0xF4, 0xAF, 0x3C, 0x2C, 0x5A, 0x11,
0x62, 0x7E, 0x70, 0x30, 0x36, 0xED, 0xA9, 0xA7, 0xD7, 0xDB, 0x5F, 0x74, 0x1A, 0xB0, 0x7E, 0xB9
},
/* Development. */
{
0xF5, 0x77, 0x10, 0x17, 0x13, 0x4B, 0x4E, 0xD4, 0xBF, 0x24, 0x0B, 0xF4, 0xBB, 0x6E, 0x4D, 0x24,
0x6C, 0xC3, 0x0C, 0x60, 0x93, 0x96, 0x9F, 0xD5, 0xA9, 0xA9, 0xB4, 0xD5, 0xD5, 0x44, 0xA6, 0x39
}
};
static SetCalRsa2048DeviceKey g_eTicketRsaDeviceKey = {0};
static KeysMemoryInfo g_fsRodataMemoryInfo = {
@ -251,6 +300,15 @@ static KeysMemoryInfo g_fsDataMemoryInfo = {
}
};
static KeysGameCardKeyset g_gameCardKeyset = {
.gc_cardinfo_kek_source = { 0xDE, 0xC6, 0x3F, 0x6A, 0xBF, 0x37, 0x72, 0x0B, 0x7E, 0x54, 0x67, 0x6A, 0x2D, 0xEF, 0xDD, 0x97 },
.gc_cardinfo_key_prod_source = { 0xF4, 0x92, 0x06, 0x52, 0xD6, 0x37, 0x70, 0xAF, 0xB1, 0x9C, 0x6F, 0x63, 0x09, 0x01, 0xF6, 0x29 },
.gc_cardinfo_key_dev_source = { 0x0B, 0x7D, 0xBB, 0x2C, 0xCF, 0x64, 0x1A, 0xF4, 0xD7, 0x38, 0x81, 0x3F, 0x0C, 0x33, 0xF4, 0x1C },
.gc_cardinfo_kek_sealed = {0},
.gc_cardinfo_key_prod = {0},
.gc_cardinfo_key_dev = {0}
};
bool keysLoadKeyset(void)
{
bool ret = false;
@ -291,6 +349,9 @@ bool keysLoadKeyset(void)
/* Read additional keys from the keys file. */
if (!keysReadKeysFromFile()) break;
/* Verify loaded Lockpick_RCM data. */
if (!keysVerifyLockpickRcmData()) break;
/* Get decrypted eTicket RSA device key. */
if (!keysGetDecryptedEticketRsaDeviceKey()) break;
@ -302,12 +363,9 @@ bool keysLoadKeyset(void)
}
#if LOG_LEVEL == LOG_LEVEL_DEBUG
if (ret)
{
LOG_DATA_DEBUG(&g_ncaKeyset, sizeof(KeysNcaKeyset), "NCA keyset dump:");
LOG_DATA_DEBUG(&g_eTicketRsaDeviceKey, sizeof(SetCalRsa2048DeviceKey), "eTicket RSA device key dump:");
LOG_DATA_DEBUG(&g_gameCardKeyset, sizeof(KeysGameCardKeyset), "Gamecard keyset dump:");
}
#endif
return ret;
@ -968,6 +1026,34 @@ static bool keysReadKeysFromFile(void)
return true;
}
static bool keysVerifyLockpickRcmData(void)
{
u8 hash[SHA256_HASH_SIZE] = {0};
u8 dev_unit = (utilsIsDevelopmentUnit() ? 1 : 0);
size_t block_size = (NcaKeyGeneration_Current * AES_128_KEY_SIZE);
/* Verify loaded NCA key area encryption keys. */
for(u8 i = 0; i < NcaKeyAreaEncryptionKeyIndex_Count; i++)
{
sha256CalculateHash(hash, g_ncaKeyset.nca_kaek[i], block_size);
if (memcmp(hash, g_ncaKaekBlockHashes[dev_unit][i], SHA256_HASH_SIZE) != 0)
{
LOG_MSG_ERROR("NCA KAEK block #%u checksum mismatch! (%s, keygen %u).", i, dev_unit ? "dev" : "prod", NcaKeyGeneration_Current);
return false;
}
}
/* Verify loaded ticket common keys. */
sha256CalculateHash(hash, g_ncaKeyset.ticket_common_keys, block_size);
if (memcmp(hash, g_ticketCommonKeysBlockHashes[dev_unit], SHA256_HASH_SIZE) != 0)
{
LOG_MSG_ERROR("Ticket common keys block checksum mismatch! (%s, keygen %u).", dev_unit ? "dev" : "prod", NcaKeyGeneration_Current);
return false;
}
return true;
}
static bool keysGetDecryptedEticketRsaDeviceKey(void)
{
Result rc = 0;