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Support pkg1+pkg2 mismatch and "dev.keys" filename

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This commit is contained in:
shchmue 2019-05-18 11:08:34 -04:00
parent b464042f3a
commit dae4c72910
1 changed files with 23 additions and 12 deletions
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35
source/keys/keys.c
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@ -285,10 +285,6 @@ get_tsec: ;
// Dump package2.
u8 *pkg2 = NULL;
pkg2_kip1_info_t *ki = NULL;
if (!_key_exists(master_key[pkg1_id->kb])) {
EPRINTF("Current master key not found.\nUnable to decrypt Package2.");
goto pkg2_done;
}
sdmmc_storage_set_mmc_partition(&storage, 0);
// Parse eMMC GPT.
@ -318,14 +314,24 @@ get_tsec: ;
pkg2 = malloc(pkg2_size_aligned);
nx_emmc_part_read(&storage, pkg2_part, 0x4000 / NX_EMMC_BLOCKSIZE, pkg2_size_aligned / NX_EMMC_BLOCKSIZE, pkg2);
// Decrypt package2 and parse KIP1 blobs in INI1 section.
se_aes_key_set(8, master_key[pkg1_id->kb], 0x10);
se_aes_unwrap_key(8, 8, package2_key_source);
pkg2_hdr_t *pkg2_hdr = pkg2_decrypt(pkg2);
if (!pkg2_hdr) {
// Decrypt package2 and parse KIP1 blobs in INI1 section. Try all available key generations in case of pkg1/pkg2 mismatch.
pkg2_hdr_t *pkg2_hdr;
pkg2_hdr_t hdr;
u32 pkg2_kb;
for (pkg2_kb = 0; pkg2_kb < MAX_KEY; pkg2_kb++) {
se_aes_key_set(8, master_key[pkg2_kb], 0x10);
se_aes_unwrap_key(8, 8, package2_key_source);
memcpy(&hdr, pkg2 + 0x100, sizeof(pkg2_hdr_t));
se_aes_crypt_ctr(8, &hdr, sizeof(pkg2_hdr_t), &hdr, sizeof(pkg2_hdr_t), &hdr);
if (hdr.magic == PKG2_MAGIC)
break;
}
if (pkg2_kb == MAX_KEY) {
EPRINTF("Failed to decrypt Package2.");
goto pkg2_done;
}
} else if (pkg2_kb != pkg1_id->kb)
EPRINTF("Warning: Package1-Package2 mismatch.");
pkg2_hdr = pkg2_decrypt(pkg2);
TPRINTFARGS("%kDecrypt pkg2... ", colors[2]);
@ -745,8 +751,13 @@ key_output: ;
TPRINTFARGS("\n%kFound %d keys.\n%kLockpick totally", colors[0], _key_count, colors[1]);
f_mkdir("switch");
if (!sd_save_to_file(text_buffer, strlen(text_buffer), "sd:/switch/prod.keys") && !f_stat("sd:/switch/prod.keys", &fno)) {
gfx_printf("%kWrote %d bytes to /switch/prod.keys\n", colors[2], (u32)fno.fsize);
char keyfile_path[30] = "sd:/switch/";
if (!(fuse_read_odm(4) & 3))
sprintf(&keyfile_path[11], "prod.keys");
else
sprintf(&keyfile_path[11], "dev.keys");
if (!sd_save_to_file(text_buffer, strlen(text_buffer), keyfile_path) && !f_stat(keyfile_path, &fno)) {
gfx_printf("%kWrote %d bytes to %s\n", colors[2], (u32)fno.fsize, keyfile_path);
} else
EPRINTF("Failed to save keys to SD.");
sd_unmount();