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hos: Support pkg2 encrypted with newer mkeys

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This commit is contained in:
CTCaer
2019-09-12 23:39:47 +03:00
parent 658c3c112f
commit 40afcfd686
8 changed files with 76 additions and 13 deletions
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37
nyx/nyx_gui/hos/pkg2.c
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@@ -28,6 +28,8 @@
#include "../gfx/gfx.h"
extern const u8 package2_keyseed[];
/*#include "util.h"
#define DPRINTF(...) gfx_printf(__VA_ARGS__)
#define DEBUG_PRINTING*/
@@ -79,9 +81,16 @@ DPRINTF(" kip1 %d:%s @ %08X (%08X)\n", i, kip1->name, (u32)kip1, ki->size);
}
}
pkg2_hdr_t *pkg2_decrypt(void *data)
static const uint8_t mkey_keyseed_8xx[][0x10] =
{
{0x4D, 0xD9, 0x98, 0x42, 0x45, 0x0D, 0xB1, 0x3C, 0x52, 0x0C, 0x9A, 0x44, 0xBB, 0xAD, 0xAF, 0x80} // Master key 8 encrypted with 9.
};
pkg2_hdr_t *pkg2_decrypt(void *data, u8 kb)
{
pkg2_hdr_t mkey_test;
u8 *pdata = (u8 *)data;
u8 keyslot = 8;
// Skip signature.
pdata += 0x100;
@@ -91,8 +100,27 @@ pkg2_hdr_t *pkg2_decrypt(void *data)
// Skip header.
pdata += sizeof(pkg2_hdr_t);
//! Check if we need to decrypt with newer mkeys. Valid for 8.1.0 and up.
if ((kb >= KB_FIRMWARE_VERSION_810) && (kb < KB_FIRMWARE_VERSION_MAX))
{
u8 tmp_mkey[0x10];
// Decrypt older encrypted mkey.
se_aes_crypt_ecb(12, 0, tmp_mkey, 0x10, mkey_keyseed_8xx[KB_FIRMWARE_VERSION_MAX - kb - 1], 0x10);
// Set and unwrap pkg2 key.
se_aes_key_set(9, tmp_mkey, 0x10);
se_aes_unwrap_key(9, 9, package2_keyseed);
// Decrypt header and test if it's valid.
se_aes_crypt_ctr(9, &mkey_test, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
if (mkey_test.magic == PKG2_MAGIC)
keyslot = 9;
else
se_aes_key_clear(9);
}
// Decrypt header.
se_aes_crypt_ctr(8, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
se_aes_crypt_ctr(keyslot, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
//gfx_hexdump((u32)hdr, hdr, 0x100);
if (hdr->magic != PKG2_MAGIC)
@@ -104,11 +132,14 @@ DPRINTF("sec %d has size %08X\n", i, hdr->sec_size[i]);
if (!hdr->sec_size[i])
continue;
se_aes_crypt_ctr(8, pdata, hdr->sec_size[i], pdata, hdr->sec_size[i], &hdr->sec_ctr[i * 0x10]);
se_aes_crypt_ctr(keyslot, pdata, hdr->sec_size[i], pdata, hdr->sec_size[i], &hdr->sec_ctr[i * 0x10]);
//gfx_hexdump((u32)pdata, pdata, 0x100);
pdata += hdr->sec_size[i];
}
if (keyslot != 8)
se_aes_key_clear(9);
return hdr;
}