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exosphere: Add support for 6.0.0.

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This commit is contained in:
Michael Scire 2018-09-08 23:51:52 -07:00
parent 488fc0f119
commit fa0e906129
15 changed files with 186 additions and 59 deletions
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26
exosphere/src/titlekey.c
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@ -19,6 +19,7 @@
#include "utils.h"
#include "arm.h"
#include "exocfg.h"
#include "titlekey.h"
#include "masterkey.h"
@ -26,6 +27,7 @@
static uint64_t g_tkey_expected_label_hash[4];
static unsigned int g_tkey_master_key_rev = MASTERKEY_REVISION_MAX;
static unsigned int g_tkey_type = 0;
/* Set the expected db prefix. */
void tkey_set_expected_label_hash(uint64_t *label_hash) {
@ -41,6 +43,17 @@ void tkey_set_master_key_rev(unsigned int master_key_rev) {
g_tkey_master_key_rev = master_key_rev;
}
static void tkey_validate_type(unsigned int type) {
if (type > TITLEKEY_TYPE_MAX || (type > 0 && exosphere_get_target_firmware() < EXOSPHERE_TARGET_FIRMWARE_600)) {
generic_panic();
}
}
void tkey_set_type(unsigned int type) {
tkey_validate_type(type);
g_tkey_type = type;
}
/* Reference for MGF1 can be found here: https://en.wikipedia.org/wiki/Mask_generation_function#MGF1 */
void calculate_mgf1_and_xor(void *masked, size_t masked_size, const void *seed, size_t seed_size) {
uint8_t cur_hash[0x20];
@ -152,18 +165,19 @@ size_t tkey_rsa_oaep_unwrap(void *dst, size_t dst_size, void *src, size_t src_si
return wrapped_titlekey_size;
}
static const uint8_t titlekek_sources[TITLEKEY_TYPE_MAX+1][0x10] = {
{0x1E, 0xDC, 0x7B, 0x3B, 0x60, 0xE6, 0xB4, 0xD8, 0x78, 0xB8, 0x17, 0x15, 0x98, 0x5E, 0x62, 0x9B},
{0x3B, 0x78, 0xF2, 0x61, 0x0F, 0x9D, 0x5A, 0xE2, 0x7B, 0x4E, 0x45, 0xAF, 0xCB, 0x0B, 0x67, 0x4D}
};
void tkey_aes_unwrap(void *dst, size_t dst_size, const void *src, size_t src_size) {
if (g_tkey_master_key_rev >= MASTERKEY_REVISION_MAX || dst_size != 0x10 || src_size != 0x10) {
generic_panic();
}
const uint8_t titlekek_source[0x10] = {
0x1E, 0xDC, 0x7B, 0x3B, 0x60, 0xE6, 0xB4, 0xD8, 0x78, 0xB8, 0x17, 0x15, 0x98, 0x5E, 0x62, 0x9B
};
/* Generate the appropriate titlekek into keyslot 9. */
unsigned int master_keyslot = mkey_get_keyslot(g_tkey_master_key_rev);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, master_keyslot, titlekek_source, 0x10);
decrypt_data_into_keyslot(KEYSLOT_SWITCH_TEMPKEY, master_keyslot, titlekek_sources[g_tkey_type], 0x10);
/* Unwrap the titlekey using the titlekek. */
se_aes_ecb_decrypt_block(KEYSLOT_SWITCH_TEMPKEY, dst, 0x10, src, 0x10);