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hos: Fix pkg2 re-encryption for exo2 & 8.1.0/9.0.X

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This commit is contained in:
CTCaer 2020-06-20 21:31:58 +03:00
parent 3214fc2f93
commit 9673d5524a
1 changed files with 10 additions and 9 deletions
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19
bootloader/hos/pkg2.c
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@ -1273,11 +1273,12 @@ static bool _pkg2_key_unwrap_validate(pkg2_hdr_t *tmp_test, pkg2_hdr_t *hdr, u8
return (tmp_test->magic == PKG2_MAGIC);
}
u8 pkg2_keyslot;
pkg2_hdr_t *pkg2_decrypt(void *data, u8 kb)
{
pkg2_hdr_t mkey_test;
u8 *pdata = (u8 *)data;
u8 keyslot = 8;
pkg2_keyslot = 8;
// Skip signature.
pdata += 0x100;
@ -1310,7 +1311,7 @@ pkg2_hdr_t *pkg2_decrypt(void *data, u8 kb)
if (res)
{
keyslot = 9;
pkg2_keyslot = 9;
goto key_found;
}
else
@ -1340,7 +1341,7 @@ pkg2_hdr_t *pkg2_decrypt(void *data, u8 kb)
key_found:
// Decrypt header.
se_aes_crypt_ctr(keyslot, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
se_aes_crypt_ctr(pkg2_keyslot, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
//gfx_hexdump((u32)hdr, hdr, 0x100);
if (hdr->magic != PKG2_MAGIC)
@ -1352,15 +1353,12 @@ DPRINTF("sec %d has size %08X\n", i, hdr->sec_size[i]);
if (!hdr->sec_size[i])
continue;
se_aes_crypt_ctr(keyslot, pdata, hdr->sec_size[i], pdata, hdr->sec_size[i], &hdr->sec_ctr[i * 0x10]);
se_aes_crypt_ctr(pkg2_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;
}
@ -1433,7 +1431,7 @@ DPRINTF("kernel @ %08X (%08X)\n", (u32)kernel, kernel_size);
hdr->sec_off[PKG2_SEC_KERNEL] = 0x60000;
}
hdr->sec_size[PKG2_SEC_KERNEL] = kernel_size;
se_aes_crypt_ctr(8, pdst, kernel_size, pdst, kernel_size, &hdr->sec_ctr[PKG2_SEC_KERNEL * 0x10]);
se_aes_crypt_ctr(pkg2_keyslot, pdst, kernel_size, pdst, kernel_size, &hdr->sec_ctr[PKG2_SEC_KERNEL * 0x10]);
pdst += kernel_size;
DPRINTF("kernel encrypted\n");
@ -1455,8 +1453,11 @@ DPRINTF("INI1 encrypted\n");
u8 key_ver = kb ? kb + 1 : 0;
*(u32 *)hdr->ctr = 0x100 + sizeof(pkg2_hdr_t) + kernel_size + ini1_size;
hdr->ctr[4] = key_ver;
se_aes_crypt_ctr(8, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
se_aes_crypt_ctr(pkg2_keyslot, hdr, sizeof(pkg2_hdr_t), hdr, sizeof(pkg2_hdr_t), hdr);
memset(hdr->ctr, 0 , 0x10);
*(u32 *)hdr->ctr = 0x100 + sizeof(pkg2_hdr_t) + kernel_size + ini1_size;
hdr->ctr[4] = key_ver;
if (pkg2_keyslot != 8)
se_aes_key_clear(9);
}