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keys: Move RSA functions out of keys.c

This commit is contained in:
shchmue 2022-11-05 15:41:16 -07:00
parent 1b2c829ca0
commit dcf4bca30c
9 changed files with 266 additions and 241 deletions
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13
source/keys/crypto.h
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@ -25,6 +25,11 @@
#include <string.h> #include <string.h>
// Sha256 hash of the null string.
static const u8 null_hash[0x20] __attribute__((aligned(4))) = {
0xE3, 0xB0, 0xC4, 0x42, 0x98, 0xFC, 0x1C, 0x14, 0x9A, 0xFB, 0xF4, 0xC8, 0x99, 0x6F, 0xB9, 0x24,
0x27, 0xAE, 0x41, 0xE4, 0x64, 0x9B, 0x93, 0x4C, 0xA4, 0x95, 0x99, 0x1B, 0x78, 0x52, 0xB8, 0x55};
static const u8 aes_kek_generation_source[0x10] __attribute__((aligned(4))) = { static const u8 aes_kek_generation_source[0x10] __attribute__((aligned(4))) = {
0x4D, 0x87, 0x09, 0x86, 0xC4, 0x5D, 0x20, 0x72, 0x2F, 0xBA, 0x10, 0x53, 0xDA, 0x92, 0xE8, 0xA9}; 0x4D, 0x87, 0x09, 0x86, 0xC4, 0x5D, 0x20, 0x72, 0x2F, 0xBA, 0x10, 0x53, 0xDA, 0x92, 0xE8, 0xA9};
@ -103,6 +108,9 @@ static const u8 secure_data_tweaks[1][0x10] __attribute__((aligned(4))) = {
{0xAC, 0xCA, 0x9A, 0xCA, 0xFF, 0x2E, 0xB9, 0x22, 0xCC, 0x1F, 0x4F, 0xAD, 0xDD, 0x77, 0x21, 0x1E} {0xAC, 0xCA, 0x9A, 0xCA, 0xFF, 0x2E, 0xB9, 0x22, 0xCC, 0x1F, 0x4F, 0xAD, 0xDD, 0x77, 0x21, 0x1E}
}; };
//!TODO: Update on keygen changes.
#define TSEC_ROOT_KEY_VERSION 2
// Lockpick_RCM keyslots // Lockpick_RCM keyslots
#define KS_BIS_00_CRYPT 0 #define KS_BIS_00_CRYPT 0
#define KS_BIS_00_TWEAK 1 #define KS_BIS_00_TWEAK 1
@ -128,11 +136,6 @@ static const u8 secure_data_tweaks[1][0x10] __attribute__((aligned(4))) = {
#define RSA_PUBLIC_EXPONENT 65537 #define RSA_PUBLIC_EXPONENT 65537
#define SSL_RSA_KEY_SIZE (SE_AES_IV_SIZE + SE_RSA2048_DIGEST_SIZE)
#define ETICKET_RSA_KEYPAIR_SIZE (SE_AES_IV_SIZE + SE_RSA2048_DIGEST_SIZE * 2 + SE_KEY_128_SIZE)
#define TICKET_SIG_TYPE_RSA2048_SHA256 0x10004
typedef struct { typedef struct {
u8 master_kek[SE_KEY_128_SIZE]; u8 master_kek[SE_KEY_128_SIZE];
u8 data[0x70]; u8 data[0x70];

88
source/keys/es_crypto.c
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@ -16,7 +16,16 @@
#include "es_crypto.h" #include "es_crypto.h"
#include "cal0_read.h"
#include "../config.h" #include "../config.h"
#include <gfx_utils.h>
#include "../gfx/tui.h"
#include <mem/minerva.h>
#include <sec/se.h>
#include <sec/se_t210.h>
#include <string.h>
extern hekate_config h_cfg; extern hekate_config h_cfg;
@ -56,3 +65,82 @@ void es_derive_rsa_kek_original(key_storage_t *keys, void *out_rsa_kek, bool is_
const u32 option = SET_SEAL_KEY_INDEX(SEAL_KEY_IMPORT_ES_DEVICE_KEY) | NOT_DEVICE_UNIQUE; const u32 option = SET_SEAL_KEY_INDEX(SEAL_KEY_IMPORT_ES_DEVICE_KEY) | NOT_DEVICE_UNIQUE;
derive_rsa_kek(KS_AES_ECB, keys, out_rsa_kek, eticket_rsa_kekek_source, kek_source, generation, option); derive_rsa_kek(KS_AES_ECB, keys, out_rsa_kek, eticket_rsa_kekek_source, kek_source, generation, option);
} }
bool decrypt_eticket_rsa_key(key_storage_t *keys, void *buffer, bool is_dev) {
if (!cal0_read(KS_BIS_00_TWEAK, KS_BIS_00_CRYPT, buffer)) {
return false;
}
nx_emmc_cal0_t *cal0 = (nx_emmc_cal0_t *)buffer;
u32 generation = 0;
const void *encrypted_key = NULL;
const void *iv = NULL;
u32 key_size = 0;
void *ctr_key = NULL;
if (!cal0_get_eticket_rsa_key(cal0, &encrypted_key, &key_size, &iv, &generation)) {
return false;
}
// Handle legacy case
if (key_size == ETICKET_RSA_KEYPAIR_SIZE) {
u32 temp_key[SE_KEY_128_SIZE / 4] = {0};
es_derive_rsa_kek_legacy(keys, temp_key);
ctr_key = temp_key;
se_aes_key_set(KS_AES_CTR, ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, &keys->eticket_rsa_keypair, sizeof(keys->eticket_rsa_keypair), encrypted_key, sizeof(keys->eticket_rsa_keypair), iv);
if (test_eticket_rsa_keypair(&keys->eticket_rsa_keypair)) {
memcpy(keys->eticket_rsa_kek, ctr_key, sizeof(keys->eticket_rsa_kek));
return true;
}
// Fall through and try usual method if not applicable
}
if (generation) {
es_derive_rsa_kek_device_unique(keys, keys->eticket_rsa_kek_personalized, generation, is_dev);
ctr_key = keys->eticket_rsa_kek_personalized;
} else {
ctr_key = keys->eticket_rsa_kek;
}
se_aes_key_set(KS_AES_CTR, ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, &keys->eticket_rsa_keypair, sizeof(keys->eticket_rsa_keypair), encrypted_key, sizeof(keys->eticket_rsa_keypair), iv);
if (!test_eticket_rsa_keypair(&keys->eticket_rsa_keypair)) {
EPRINTF("Invalid eticket keypair.");
memset(&keys->eticket_rsa_keypair, 0, sizeof(keys->eticket_rsa_keypair));
return false;
}
return true;
}
void es_decode_tickets(u32 buf_size, titlekey_buffer_t *titlekey_buffer, u32 remaining, u32 total, u32 *titlekey_count, u32 x, u32 y, u32 *pct, u32 *last_pct, bool is_personalized) {
ticket_t *curr_ticket = (ticket_t *)titlekey_buffer->read_buffer;
for (u32 i = 0; i < MIN(buf_size / sizeof(ticket_t), remaining) * sizeof(ticket_t) && curr_ticket->signature_type != 0; i += sizeof(ticket_t), curr_ticket++) {
minerva_periodic_training();
*pct = (total - remaining) * 100 / total;
if (*pct > *last_pct && *pct <= 100) {
*last_pct = *pct;
tui_pbar(x, y, *pct, COLOR_GREEN, 0xFF155500);
}
// This is in case an encrypted volatile ticket is left behind
if (curr_ticket->signature_type != TICKET_SIG_TYPE_RSA2048_SHA256)
continue;
u8 *curr_titlekey = curr_ticket->titlekey_block;
const u32 block_size = SE_RSA2048_DIGEST_SIZE;
const u32 titlekey_size = sizeof(titlekey_buffer->titlekeys[0]);
if (is_personalized) {
se_rsa_exp_mod(0, curr_titlekey, block_size, curr_titlekey, block_size);
if (rsa_oaep_decode(curr_titlekey, titlekey_size, null_hash, sizeof(null_hash), curr_titlekey, block_size) != titlekey_size)
continue;
}
memcpy(titlekey_buffer->rights_ids[*titlekey_count], curr_ticket->rights_id, sizeof(titlekey_buffer->rights_ids[0]));
memcpy(titlekey_buffer->titlekeys[*titlekey_count], curr_titlekey, titlekey_size);
(*titlekey_count)++;
}
}

9
source/keys/es_crypto.h
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@ -20,8 +20,13 @@
#include "crypto.h" #include "crypto.h"
#include "es_types.h" #include "es_types.h"
#include <sec/se_t210.h>
#include <utils/types.h> #include <utils/types.h>
#define ETICKET_RSA_KEYPAIR_SIZE (SE_AES_IV_SIZE + SE_RSA2048_DIGEST_SIZE * 2 + SE_KEY_128_SIZE)
#define TICKET_SIG_TYPE_RSA2048_SHA256 0x10004
static const u8 eticket_rsa_kek_source[0x10] __attribute__((aligned(4))) = { static const u8 eticket_rsa_kek_source[0x10] __attribute__((aligned(4))) = {
0xDB, 0xA4, 0x51, 0x12, 0x4C, 0xA0, 0xA9, 0x83, 0x68, 0x14, 0xF5, 0xED, 0x95, 0xE3, 0x12, 0x5B}; 0xDB, 0xA4, 0x51, 0x12, 0x4C, 0xA0, 0xA9, 0x83, 0x68, 0x14, 0xF5, 0xED, 0x95, 0xE3, 0x12, 0x5B};
static const u8 eticket_rsa_kek_source_dev[0x10] __attribute__((aligned(4))) = { static const u8 eticket_rsa_kek_source_dev[0x10] __attribute__((aligned(4))) = {
@ -37,4 +42,8 @@ void es_derive_rsa_kek_device_unique(key_storage_t *keys, void *out_rsa_kek, u32
void es_derive_rsa_kek_legacy(key_storage_t *keys, void *out_rsa_kek); void es_derive_rsa_kek_legacy(key_storage_t *keys, void *out_rsa_kek);
void es_derive_rsa_kek_original(key_storage_t *keys, void *out_rsa_kek, bool is_dev); void es_derive_rsa_kek_original(key_storage_t *keys, void *out_rsa_kek, bool is_dev);
bool decrypt_eticket_rsa_key(key_storage_t *keys, void *buffer, bool is_dev);
void es_decode_tickets(u32 buf_size, titlekey_buffer_t *titlekey_buffer, u32 remaining, u32 total, u32 *titlekey_count, u32 x, u32 y, u32 *pct, u32 *last_pct, bool is_personalized);
#endif #endif

46
source/keys/es_types.h
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@ -27,4 +27,50 @@ typedef struct {
u8 reserved[0xC]; u8 reserved[0xC];
} eticket_rsa_keypair_t; } eticket_rsa_keypair_t;
// only tickets of type Rsa2048Sha256 are expected
typedef struct {
u32 signature_type; // always 0x10004
u8 signature[SE_RSA2048_DIGEST_SIZE];
u8 sig_padding[0x3C];
char issuer[0x40];
u8 titlekey_block[SE_RSA2048_DIGEST_SIZE];
u8 format_version;
u8 titlekey_type;
u16 ticket_version;
u8 license_type;
u8 common_key_id;
u16 property_mask;
u64 reserved;
u64 ticket_id;
u64 device_id;
u8 rights_id[0x10];
u32 account_id;
u32 sect_total_size;
u32 sect_hdr_offset;
u16 sect_hdr_count;
u16 sect_hdr_entry_size;
u8 padding[0x140];
} ticket_t;
typedef struct {
u8 rights_id[0x10];
u64 ticket_id;
u32 account_id;
u16 property_mask;
u16 reserved;
} ticket_record_t;
typedef struct {
u8 read_buffer[SZ_256K];
u8 rights_ids[SZ_256K / 0x10][0x10];
u8 titlekeys[SZ_256K / 0x10][0x10];
} titlekey_buffer_t;
typedef struct {
char rights_id[0x20];
char equals[3];
char titlekey[0x20];
char newline[1];
} titlekey_text_buffer_t;
#endif #endif

5
source/keys/key_sources.inl
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@ -14,11 +14,6 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
// Sha256 hash of the null string.
static const u8 null_hash[0x20] __attribute__((aligned(4))) = {
0xE3, 0xB0, 0xC4, 0x42, 0x98, 0xFC, 0x1C, 0x14, 0x9A, 0xFB, 0xF4, 0xC8, 0x99, 0x6F, 0xB9, 0x24,
0x27, 0xAE, 0x41, 0xE4, 0x64, 0x9B, 0x93, 0x4C, 0xA4, 0x95, 0x99, 0x1B, 0x78, 0x52, 0xB8, 0x55};
static const u8 master_kek_sources[KB_FIRMWARE_VERSION_MAX - KB_FIRMWARE_VERSION_620 + 1][0x10] __attribute__((aligned(4))) = { static const u8 master_kek_sources[KB_FIRMWARE_VERSION_MAX - KB_FIRMWARE_VERSION_620 + 1][0x10] __attribute__((aligned(4))) = {
{0x37, 0x4B, 0x77, 0x29, 0x59, 0xB4, 0x04, 0x30, 0x81, 0xF6, 0xE5, 0x8C, 0x6D, 0x36, 0x17, 0x9A}, //6.2.0 {0x37, 0x4B, 0x77, 0x29, 0x59, 0xB4, 0x04, 0x30, 0x81, 0xF6, 0xE5, 0x8C, 0x6D, 0x36, 0x17, 0x9A}, //6.2.0
{0x9A, 0x3E, 0xA9, 0xAB, 0xFD, 0x56, 0x46, 0x1C, 0x9B, 0xF6, 0x48, 0x7F, 0x5C, 0xFA, 0x09, 0x5C}, //7.0.0 {0x9A, 0x3E, 0xA9, 0xAB, 0xFD, 0x56, 0x46, 0x1C, 0x9B, 0xF6, 0x48, 0x7F, 0x5C, 0xFA, 0x09, 0x5C}, //7.0.0

227
source/keys/keys.c
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@ -16,10 +16,8 @@
#include "keys.h" #include "keys.h"
#include "cal0_read.h"
#include "es_crypto.h" #include "es_crypto.h"
#include "fs_crypto.h" #include "fs_crypto.h"
#include "gmac.h"
#include "nfc_crypto.h" #include "nfc_crypto.h"
#include "ssl_crypto.h" #include "ssl_crypto.h"
@ -127,7 +125,7 @@ static void _derive_keyblob_keys(key_storage_t *keys) {
bool have_keyblobs = true; bool have_keyblobs = true;
if (FUSE(FUSE_PRIVATE_KEY0) == 0xFFFFFFFF) { if (FUSE(FUSE_PRIVATE_KEY0) == 0xFFFFFFFF) {
u8 *aes_keys = (u8 *)calloc(SZ_4K, 1); u8 *aes_keys = (u8 *)calloc(1, SZ_4K);
se_get_aes_keys(aes_keys + SZ_2K, aes_keys, SE_KEY_128_SIZE); se_get_aes_keys(aes_keys + SZ_2K, aes_keys, SE_KEY_128_SIZE);
memcpy(keys->sbk, aes_keys + 14 * SE_KEY_128_SIZE, SE_KEY_128_SIZE); memcpy(keys->sbk, aes_keys + 14 * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
free(aes_keys); free(aes_keys);
@ -183,22 +181,47 @@ static void _derive_keyblob_keys(key_storage_t *keys) {
free(keyblob_block); free(keyblob_block);
} }
static void _derive_master_keys(key_storage_t *prod_keys, key_storage_t *dev_keys, bool is_dev) {
key_storage_t *keys = is_dev ? dev_keys : prod_keys;
if (h_cfg.t210b01) {
_derive_master_keys_mariko(keys, is_dev);
_derive_master_keys_from_latest_key(keys, is_dev);
} else {
if (run_ams_keygen(keys)) {
EPRINTF("Failed to run keygen.");
return;
}
u8 *aes_keys = (u8 *)calloc(1, SZ_4K);
se_get_aes_keys(aes_keys + SZ_2K, aes_keys, SE_KEY_128_SIZE);
memcpy(&dev_keys->tsec_root_key, aes_keys + KS_TSEC_ROOT_DEV * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
memcpy(keys->tsec_key, aes_keys + KS_TSEC * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
memcpy(&prod_keys->tsec_root_key, aes_keys + KS_TSEC_ROOT * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
free(aes_keys);
_derive_master_keys_from_latest_key(prod_keys, false);
_derive_master_keys_from_latest_key(dev_keys, true);
_derive_keyblob_keys(keys);
}
}
static void _derive_bis_keys(key_storage_t *keys) { static void _derive_bis_keys(key_storage_t *keys) {
minerva_periodic_training(); minerva_periodic_training();
u32 generation = fuse_read_odm_keygen_rev(); u32 generation = fuse_read_odm_keygen_rev();
fs_derive_bis_keys(keys, keys->bis_key, generation); fs_derive_bis_keys(keys, keys->bis_key, generation);
} }
static void _derive_misc_keys(key_storage_t *keys, bool is_dev) { static void _derive_misc_keys(key_storage_t *keys) {
minerva_periodic_training(); minerva_periodic_training();
fs_derive_save_mac_key(keys, keys->save_mac_key); fs_derive_save_mac_key(keys, keys->save_mac_key);
es_derive_rsa_kek_original(keys, keys->eticket_rsa_kek, is_dev);
ssl_derive_rsa_kek_original(keys, keys->ssl_rsa_kek, is_dev);
} }
static void _derive_non_unique_keys(key_storage_t *keys) { static void _derive_non_unique_keys(key_storage_t *keys, bool is_dev) {
minerva_periodic_training(); minerva_periodic_training();
fs_derive_header_key(keys, keys->header_key); fs_derive_header_key(keys, keys->header_key);
es_derive_rsa_kek_original(keys, keys->eticket_rsa_kek, is_dev);
ssl_derive_rsa_kek_original(keys, keys->ssl_rsa_kek, is_dev);
for (u32 generation = 0; generation < ARRAY_SIZE(keys->master_key); generation++) { for (u32 generation = 0; generation < ARRAY_SIZE(keys->master_key); generation++) {
minerva_periodic_training(); minerva_periodic_training();
@ -223,34 +246,6 @@ static bool _count_ticket_records(u32 buf_size, titlekey_buffer_t *titlekey_buff
return false; return false;
} }
static void _decode_tickets(u32 buf_size, titlekey_buffer_t *titlekey_buffer, u32 remaining, u32 total, u32 x, u32 y, u32 *pct, u32 *last_pct, bool is_personalized) {
ticket_t *curr_ticket = (ticket_t *)titlekey_buffer->read_buffer;
for (u32 i = 0; i < MIN(buf_size / sizeof(ticket_t), remaining) * sizeof(ticket_t) && curr_ticket->signature_type != 0; i += sizeof(ticket_t), curr_ticket++) {
minerva_periodic_training();
*pct = (total - remaining) * 100 / total;
if (*pct > *last_pct && *pct <= 100) {
*last_pct = *pct;
tui_pbar(x, y, *pct, COLOR_GREEN, 0xFF155500);
}
// This is in case an encrypted volatile ticket is left behind
if (curr_ticket->signature_type != TICKET_SIG_TYPE_RSA2048_SHA256)
continue;
u8 *curr_titlekey = curr_ticket->titlekey_block;
const u32 block_size = SE_RSA2048_DIGEST_SIZE;
const u32 titlekey_size = sizeof(titlekey_buffer->titlekeys[0]);
if (is_personalized) {
se_rsa_exp_mod(0, curr_titlekey, block_size, curr_titlekey, block_size);
if (rsa_oaep_decode(curr_titlekey, titlekey_size, null_hash, sizeof(null_hash), curr_titlekey, block_size) != titlekey_size)
continue;
}
memcpy(titlekey_buffer->rights_ids[_titlekey_count], curr_ticket->rights_id, sizeof(titlekey_buffer->rights_ids[0]));
memcpy(titlekey_buffer->titlekeys[_titlekey_count], curr_titlekey, titlekey_size);
_titlekey_count++;
}
}
static bool _get_titlekeys_from_save(u32 buf_size, const u8 *save_mac_key, titlekey_buffer_t *titlekey_buffer, eticket_rsa_keypair_t *rsa_keypair) { static bool _get_titlekeys_from_save(u32 buf_size, const u8 *save_mac_key, titlekey_buffer_t *titlekey_buffer, eticket_rsa_keypair_t *rsa_keypair) {
FIL fp; FIL fp;
u64 br = buf_size; u64 br = buf_size;
@ -328,7 +323,7 @@ static bool _get_titlekeys_from_save(u32 buf_size, const u8 *save_mac_key, title
if (!save_data_file_read(&ticket_file, &br, offset, titlekey_buffer->read_buffer, buf_size) || titlekey_buffer->read_buffer[0] == 0 || br != buf_size) if (!save_data_file_read(&ticket_file, &br, offset, titlekey_buffer->read_buffer, buf_size) || titlekey_buffer->read_buffer[0] == 0 || br != buf_size)
break; break;
offset += br; offset += br;
_decode_tickets(buf_size, titlekey_buffer, remaining, file_tkey_count, save_x, save_y, &pct, &last_pct, is_personalized); es_decode_tickets(buf_size, titlekey_buffer, remaining, file_tkey_count, &_titlekey_count, save_x, save_y, &pct, &last_pct, is_personalized);
remaining -= MIN(buf_size / sizeof(ticket_t), remaining); remaining -= MIN(buf_size / sizeof(ticket_t), remaining);
} }
tui_pbar(save_x, save_y, 100, COLOR_GREEN, 0xFF155500); tui_pbar(save_x, save_y, 100, COLOR_GREEN, 0xFF155500);
@ -382,7 +377,8 @@ static bool _derive_sd_seed(key_storage_t *keys) {
} }
u8 read_buf[0x20] __attribute__((aligned(4))) = {0}; u8 read_buf[0x20] __attribute__((aligned(4))) = {0};
// Skip the two header blocks and only check the first bytes of each block - file contents are always block-aligned // Skip the two header blocks and only check the first bytes of each block
// File contents are always block-aligned
for (u32 i = SAVE_BLOCK_SIZE_DEFAULT * 2; i < f_size(&fp); i += SAVE_BLOCK_SIZE_DEFAULT) { for (u32 i = SAVE_BLOCK_SIZE_DEFAULT * 2; i < f_size(&fp); i += SAVE_BLOCK_SIZE_DEFAULT) {
if (f_lseek(&fp, i) || f_read(&fp, read_buf, 0x20, &read_bytes) || read_bytes != 0x20) if (f_lseek(&fp, i) || f_read(&fp, read_buf, 0x20, &read_bytes) || read_bytes != 0x20)
break; break;
@ -398,120 +394,8 @@ static bool _derive_sd_seed(key_storage_t *keys) {
return true; return true;
} }
static bool _decrypt_ssl_rsa_key(key_storage_t *keys, titlekey_buffer_t *titlekey_buffer) {
if (!cal0_read(KS_BIS_00_TWEAK, KS_BIS_00_CRYPT, titlekey_buffer->read_buffer)) {
return false;
}
nx_emmc_cal0_t *cal0 = (nx_emmc_cal0_t *)titlekey_buffer->read_buffer;
u32 generation = 0;
const void *encrypted_key = NULL;
const void *iv = NULL;
u32 key_size = 0;
void *ctr_key = NULL;
bool enforce_unique = true;
if (!cal0_get_ssl_rsa_key(cal0, &encrypted_key, &key_size, &iv, &generation)) {
return false;
}
if (key_size == SSL_RSA_KEY_SIZE) {
bool all_zero = true;
const u8 *key8 = (const u8 *)encrypted_key;
for (u32 i = SE_RSA2048_DIGEST_SIZE; i < SSL_RSA_KEY_SIZE; i++) {
if (key8[i] != 0) {
all_zero = false;
break;
}
}
if (all_zero) {
// Keys of this form are not encrypted
memcpy(keys->ssl_rsa_key, encrypted_key, SE_RSA2048_DIGEST_SIZE);
return true;
}
ssl_derive_rsa_kek_legacy(keys, keys->ssl_rsa_kek_legacy);
ctr_key = keys->ssl_rsa_kek_legacy;
enforce_unique = false;
} else if (generation) {
ssl_derive_rsa_kek_device_unique(keys, keys->ssl_rsa_kek_personalized, generation);
ctr_key = keys->ssl_rsa_kek_personalized;
} else {
ctr_key = keys->ssl_rsa_kek;
}
u32 ctr_size = enforce_unique ? key_size - 0x20 : key_size - 0x10;
se_aes_key_set(KS_AES_CTR, ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, keys->ssl_rsa_key, ctr_size, encrypted_key, ctr_size, iv);
if (enforce_unique) {
u32 calc_mac[SE_KEY_128_SIZE / 4] = {0};
calc_gmac(KS_AES_ECB, calc_mac, keys->ssl_rsa_key, ctr_size, ctr_key, iv);
const u8 *key8 = (const u8 *)encrypted_key;
if (memcmp(calc_mac, &key8[ctr_size], 0x10) != 0) {
EPRINTF("SSL keypair has invalid GMac.");
memset(keys->ssl_rsa_key, 0, sizeof(keys->ssl_rsa_key));
return false;
}
}
return true;
}
static bool _decrypt_eticket_rsa_key(key_storage_t *keys, titlekey_buffer_t *titlekey_buffer, bool is_dev) {
if (!cal0_read(KS_BIS_00_TWEAK, KS_BIS_00_CRYPT, titlekey_buffer->read_buffer)) {
return false;
}
nx_emmc_cal0_t *cal0 = (nx_emmc_cal0_t *)titlekey_buffer->read_buffer;
u32 generation = 0;
const void *encrypted_key = NULL;
const void *iv = NULL;
u32 key_size = 0;
void *ctr_key = NULL;
if (!cal0_get_eticket_rsa_key(cal0, &encrypted_key, &key_size, &iv, &generation)) {
return false;
}
// Handle legacy case
if (key_size == ETICKET_RSA_KEYPAIR_SIZE) {
u32 temp_key[SE_KEY_128_SIZE / 4] = {0};
es_derive_rsa_kek_legacy(keys, temp_key);
ctr_key = temp_key;
se_aes_key_set(KS_AES_CTR, ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, &keys->eticket_rsa_keypair, sizeof(keys->eticket_rsa_keypair), encrypted_key, sizeof(keys->eticket_rsa_keypair), iv);
if (test_eticket_rsa_keypair(&keys->eticket_rsa_keypair)) {
memcpy(keys->eticket_rsa_kek, ctr_key, sizeof(keys->eticket_rsa_kek));
return true;
}
// Fall through and try usual method if not applicable
}
if (generation) {
es_derive_rsa_kek_device_unique(keys, keys->eticket_rsa_kek_personalized, generation, is_dev);
ctr_key = keys->eticket_rsa_kek_personalized;
} else {
ctr_key = keys->eticket_rsa_kek;
}
se_aes_key_set(KS_AES_CTR, ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, &keys->eticket_rsa_keypair, sizeof(keys->eticket_rsa_keypair), encrypted_key, sizeof(keys->eticket_rsa_keypair), iv);
if (!test_eticket_rsa_keypair(&keys->eticket_rsa_keypair)) {
EPRINTF("Invalid eticket keypair.");
memset(&keys->eticket_rsa_keypair, 0, sizeof(keys->eticket_rsa_keypair));
return false;
}
return true;
}
static bool _derive_titlekeys(key_storage_t *keys, titlekey_buffer_t *titlekey_buffer, bool is_dev) { static bool _derive_titlekeys(key_storage_t *keys, titlekey_buffer_t *titlekey_buffer, bool is_dev) {
if (!key_exists(keys->eticket_rsa_kek)) { if (!key_exists(&keys->eticket_rsa_keypair)) {
return false; return false;
} }
@ -543,12 +427,12 @@ static bool _derive_emmc_keys(key_storage_t *keys, titlekey_buffer_t *titlekey_b
return false; return false;
} }
bool res = _decrypt_ssl_rsa_key(keys, titlekey_buffer); bool res = decrypt_ssl_rsa_key(keys, titlekey_buffer);
if (!res) { if (!res) {
EPRINTF("Unable to derive SSL key."); EPRINTF("Unable to derive SSL key.");
} }
res =_decrypt_eticket_rsa_key(keys, titlekey_buffer, is_dev); res = decrypt_eticket_rsa_key(keys, titlekey_buffer, is_dev);
if (!res) { if (!res) {
EPRINTF("Unable to derive ETicket key."); EPRINTF("Unable to derive ETicket key.");
} }
@ -611,7 +495,7 @@ int save_mariko_partial_keys(u32 start, u32 count, bool append) {
u32 pos = 0; u32 pos = 0;
u32 zeros[SE_KEY_128_SIZE / 4] = {0}; u32 zeros[SE_KEY_128_SIZE / 4] = {0};
u8 *data = malloc(4 * SE_KEY_128_SIZE); u8 *data = malloc(4 * SE_KEY_128_SIZE);
char *text_buffer = calloc(1, 0x100 * count); char *text_buffer = calloc(count, 0x100);
for (u32 ks = start; ks < start + count; ks++) { for (u32 ks = start; ks < start + count; ks++) {
// Check if key is as expected // Check if key is as expected
@ -688,14 +572,13 @@ int save_mariko_partial_keys(u32 start, u32 count, bool append) {
} }
static void _save_keys_to_sd(key_storage_t *keys, titlekey_buffer_t *titlekey_buffer, bool is_dev) { static void _save_keys_to_sd(key_storage_t *keys, titlekey_buffer_t *titlekey_buffer, bool is_dev) {
char *text_buffer = NULL;
if (!sd_mount()) { if (!sd_mount()) {
EPRINTF("Unable to mount SD."); EPRINTF("Unable to mount SD.");
return; return;
} }
u32 text_buffer_size = MAX(_titlekey_count * sizeof(titlekey_text_buffer_t) + 1, SZ_16K); u32 text_buffer_size = MAX(_titlekey_count * sizeof(titlekey_text_buffer_t) + 1, SZ_16K);
text_buffer = (char *)calloc(1, text_buffer_size); char *text_buffer = (char *)calloc(1, text_buffer_size);
SAVE_KEY(aes_kek_generation_source); SAVE_KEY(aes_kek_generation_source);
SAVE_KEY(aes_key_generation_source); SAVE_KEY(aes_key_generation_source);
@ -765,9 +648,8 @@ static void _save_keys_to_sd(key_storage_t *keys, titlekey_buffer_t *titlekey_bu
SAVE_KEY(titlekek_source); SAVE_KEY(titlekek_source);
SAVE_KEY_VAR(tsec_key, keys->tsec_key); SAVE_KEY_VAR(tsec_key, keys->tsec_key);
const u32 root_key_ver = 2;
char root_key_name[21] = "tsec_root_key_00"; char root_key_name[21] = "tsec_root_key_00";
s_printf(root_key_name + 14, "%02x", root_key_ver); s_printf(root_key_name + 14, "%02x", TSEC_ROOT_KEY_VERSION);
_save_key(root_key_name, keys->tsec_root_key, SE_KEY_128_SIZE, text_buffer); _save_key(root_key_name, keys->tsec_root_key, SE_KEY_128_SIZE, text_buffer);
gfx_printf("\n%k Found %d %s keys.\n\n", colors[(color_idx++) % 6], _key_count, is_dev ? "dev" : "prod"); gfx_printf("\n%k Found %d %s keys.\n\n", colors[(color_idx++) % 6], _key_count, is_dev ? "dev" : "prod");
@ -811,31 +693,6 @@ static void _save_keys_to_sd(key_storage_t *keys, titlekey_buffer_t *titlekey_bu
free(text_buffer); free(text_buffer);
} }
static void _derive_master_keys(key_storage_t *prod_keys, key_storage_t *dev_keys, bool is_dev) {
key_storage_t *keys = is_dev ? dev_keys : prod_keys;
if (h_cfg.t210b01) {
_derive_master_keys_mariko(keys, is_dev);
_derive_master_keys_from_latest_key(keys, is_dev);
} else {
if (run_ams_keygen(keys)) {
EPRINTF("Failed to run keygen.");
return;
}
u8 *aes_keys = (u8 *)calloc(SZ_4K, 1);
se_get_aes_keys(aes_keys + SZ_2K, aes_keys, SE_KEY_128_SIZE);
memcpy(&dev_keys->tsec_root_key, aes_keys + KS_TSEC_ROOT_DEV * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
memcpy(keys->tsec_key, aes_keys + KS_TSEC * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
memcpy(&prod_keys->tsec_root_key, aes_keys + KS_TSEC_ROOT * SE_KEY_128_SIZE, SE_KEY_128_SIZE);
free(aes_keys);
_derive_master_keys_from_latest_key(prod_keys, false);
_derive_master_keys_from_latest_key(dev_keys, true);
_derive_keyblob_keys(keys);
}
}
static void _derive_keys() { static void _derive_keys() {
minerva_periodic_training(); minerva_periodic_training();
@ -872,9 +729,9 @@ static void _derive_keys() {
TPRINTFARGS("%kBIS keys... ", colors[(color_idx++) % 6]); TPRINTFARGS("%kBIS keys... ", colors[(color_idx++) % 6]);
_derive_misc_keys(keys, is_dev); _derive_misc_keys(keys);
_derive_non_unique_keys(&prod_keys); _derive_non_unique_keys(&prod_keys, is_dev);
_derive_non_unique_keys(&dev_keys); _derive_non_unique_keys(&dev_keys, is_dev);
titlekey_buffer_t *titlekey_buffer = (titlekey_buffer_t *)TITLEKEY_BUF_ADR; titlekey_buffer_t *titlekey_buffer = (titlekey_buffer_t *)TITLEKEY_BUF_ADR;

46
source/keys/keys.h
View File

@ -23,52 +23,6 @@
#include <sec/se_t210.h> #include <sec/se_t210.h>
#include <utils/types.h> #include <utils/types.h>
// only tickets of type Rsa2048Sha256 are expected
typedef struct {
u32 signature_type; // always 0x10004
u8 signature[SE_RSA2048_DIGEST_SIZE];
u8 sig_padding[0x3C];
char issuer[0x40];
u8 titlekey_block[SE_RSA2048_DIGEST_SIZE];
u8 format_version;
u8 titlekey_type;
u16 ticket_version;
u8 license_type;
u8 common_key_id;
u16 property_mask;
u64 reserved;
u64 ticket_id;
u64 device_id;
u8 rights_id[0x10];
u32 account_id;
u32 sect_total_size;
u32 sect_hdr_offset;
u16 sect_hdr_count;
u16 sect_hdr_entry_size;
u8 padding[0x140];
} ticket_t;
typedef struct {
u8 rights_id[0x10];
u64 ticket_id;
u32 account_id;
u16 property_mask;
u16 reserved;
} ticket_record_t;
typedef struct {
u8 read_buffer[SZ_256K];
u8 rights_ids[SZ_256K / 0x10][0x10];
u8 titlekeys[SZ_256K / 0x10][0x10];
} titlekey_buffer_t;
typedef struct {
char rights_id[0x20];
char equals[3];
char titlekey[0x20];
char newline[1];
} titlekey_text_buffer_t;
#define TPRINTF(text) \ #define TPRINTF(text) \
end_time = get_tmr_us(); \ end_time = get_tmr_us(); \
gfx_printf(text" done in %d us\n", end_time - start_time); \ gfx_printf(text" done in %d us\n", end_time - start_time); \

69
source/keys/ssl_crypto.c
View File

@ -16,7 +16,15 @@
#include "ssl_crypto.h" #include "ssl_crypto.h"
#include "cal0_read.h"
#include "gmac.h"
#include "../config.h" #include "../config.h"
#include <gfx_utils.h>
#include <sec/se.h>
#include <sec/se_t210.h>
#include <string.h>
extern hekate_config h_cfg; extern hekate_config h_cfg;
@ -49,3 +57,64 @@ void ssl_derive_rsa_kek_original(key_storage_t *keys, void *out_rsa_kek, bool is
u32 option = SET_SEAL_KEY_INDEX(SEAL_KEY_DECRYPT_DEVICE_UNIQUE_DATA) | NOT_DEVICE_UNIQUE; u32 option = SET_SEAL_KEY_INDEX(SEAL_KEY_DECRYPT_DEVICE_UNIQUE_DATA) | NOT_DEVICE_UNIQUE;
derive_rsa_kek(KS_AES_ECB, keys, out_rsa_kek, ssl_rsa_kekek_source, ssl_kek_source, generation, option); derive_rsa_kek(KS_AES_ECB, keys, out_rsa_kek, ssl_rsa_kekek_source, ssl_kek_source, generation, option);
} }
bool decrypt_ssl_rsa_key(key_storage_t *keys, void *buffer) {
if (!cal0_read(KS_BIS_00_TWEAK, KS_BIS_00_CRYPT, buffer)) {
return false;
}
nx_emmc_cal0_t *cal0 = (nx_emmc_cal0_t *)buffer;
u32 generation = 0;
const void *encrypted_key = NULL;
const void *iv = NULL;
u32 key_size = 0;
void *ctr_key = NULL;
bool enforce_unique = true;
if (!cal0_get_ssl_rsa_key(cal0, &encrypted_key, &key_size, &iv, &generation)) {
return false;
}
if (key_size == SSL_RSA_KEY_SIZE) {
bool all_zero = true;
const u8 *key8 = (const u8 *)encrypted_key;
for (u32 i = SE_RSA2048_DIGEST_SIZE; i < SSL_RSA_KEY_SIZE; i++) {
if (key8[i] != 0) {
all_zero = false;
break;
}
}
if (all_zero) {
// Keys of this form are not encrypted
memcpy(keys->ssl_rsa_key, encrypted_key, SE_RSA2048_DIGEST_SIZE);
return true;
}
ssl_derive_rsa_kek_legacy(keys, keys->ssl_rsa_kek_legacy);
ctr_key = keys->ssl_rsa_kek_legacy;
enforce_unique = false;
} else if (generation) {
ssl_derive_rsa_kek_device_unique(keys, keys->ssl_rsa_kek_personalized, generation);
ctr_key = keys->ssl_rsa_kek_personalized;
} else {
ctr_key = keys->ssl_rsa_kek;
}
u32 ctr_size = enforce_unique ? key_size - 0x20 : key_size - 0x10;
se_aes_key_set(KS_AES_CTR, ctr_key, SE_KEY_128_SIZE);
se_aes_crypt_ctr(KS_AES_CTR, keys->ssl_rsa_key, ctr_size, encrypted_key, ctr_size, iv);
if (enforce_unique) {
u32 calc_mac[SE_KEY_128_SIZE / 4] = {0};
calc_gmac(KS_AES_ECB, calc_mac, keys->ssl_rsa_key, ctr_size, ctr_key, iv);
const u8 *key8 = (const u8 *)encrypted_key;
if (memcmp(calc_mac, &key8[ctr_size], 0x10) != 0) {
EPRINTF("SSL keypair has invalid GMac.");
memset(keys->ssl_rsa_key, 0, sizeof(keys->ssl_rsa_key));
return false;
}
}
return true;
}

4
source/keys/ssl_crypto.h
View File

@ -21,6 +21,8 @@
#include <utils/types.h> #include <utils/types.h>
#define SSL_RSA_KEY_SIZE (SE_AES_IV_SIZE + SE_RSA2048_DIGEST_SIZE)
static const u8 ssl_rsa_kekek_source[0x10] __attribute__((aligned(4))) = { static const u8 ssl_rsa_kekek_source[0x10] __attribute__((aligned(4))) = {
0x7F, 0x5B, 0xB0, 0x84, 0x7B, 0x25, 0xAA, 0x67, 0xFA, 0xC8, 0x4B, 0xE2, 0x3D, 0x7B, 0x69, 0x03}; 0x7F, 0x5B, 0xB0, 0x84, 0x7B, 0x25, 0xAA, 0x67, 0xFA, 0xC8, 0x4B, 0xE2, 0x3D, 0x7B, 0x69, 0x03};
static const u8 ssl_rsa_kek_source[0x10] __attribute__((aligned(4))) = { static const u8 ssl_rsa_kek_source[0x10] __attribute__((aligned(4))) = {
@ -38,4 +40,6 @@ void ssl_derive_rsa_kek_device_unique(key_storage_t *keys, void *out_rsa_kek, u3
void ssl_derive_rsa_kek_legacy(key_storage_t *keys, void *out_rsa_kek); void ssl_derive_rsa_kek_legacy(key_storage_t *keys, void *out_rsa_kek);
void ssl_derive_rsa_kek_original(key_storage_t *keys, void *out_rsa_kek, bool is_dev); void ssl_derive_rsa_kek_original(key_storage_t *keys, void *out_rsa_kek, bool is_dev);
bool decrypt_ssl_rsa_key(key_storage_t *keys, void *buffer);
#endif #endif