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Added support for Wii RVT-R disc images.

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These disc images are encrypted and signed using a different set of keys.
We only care about the master key, so we check the signature issuer. If
it matches the debug issuer, then we'll use the RVT-R key. Otherwise,
the previous set of common and Korean keys are used.
This commit is contained in:
David Korth 2016-11-30 01:01:12 -05:00
parent 3cfc49a613
commit 25fe999a79
1 changed files with 28 additions and 11 deletions
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39
Source/Core/DiscIO/VolumeCreator.cpp
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@ -39,6 +39,11 @@ static const unsigned char s_master_key[16] = {0xeb, 0xe4, 0x2a, 0x22, 0x5e, 0x8
static const unsigned char s_master_key_korean[16] = {
0x63, 0xb8, 0x2b, 0xb4, 0xf4, 0x61, 0x4e, 0x2e, 0x13, 0xf2, 0xfe, 0xfb, 0xba, 0x4c, 0x9b, 0x7e};
static const unsigned char s_master_key_rvt[16] = {0xa1, 0x60, 0x4a, 0x6a, 0x71, 0x23, 0xb5, 0x29,
0xae, 0x8b, 0xec, 0x32, 0xc8, 0x16, 0xfc, 0xaa};
static const char s_issuer_rvt[] = "Root-CA00000002-XS00000006";
static std::unique_ptr<IVolume> CreateVolumeFromCryptedWiiImage(std::unique_ptr<IBlobReader> reader,
u32 partition_group,
u32 volume_type, u32 volume_number);
@ -89,18 +94,30 @@ void VolumeKeyForPartition(IBlobReader& _rReader, u64 offset, u8* VolumeKey)
memset(IV, 0, 16);
_rReader.Read(offset + 0x44c, 8, IV);
// Issue: 6813
// Magic value is at partition's offset + 0x1f1 (1byte)
// If encrypted with the Korean key, the magic value would be 1
// Otherwise it is zero
u8 using_korean_key = 0;
_rReader.Read(offset + 0x1f1, sizeof(u8), &using_korean_key);
u8 region = 0;
_rReader.Read(0x3, sizeof(u8), &region);
mbedtls_aes_context AES_ctx;
mbedtls_aes_setkey_dec(
&AES_ctx, (using_korean_key == 1 && region == 'K' ? s_master_key_korean : s_master_key), 128);
u8 issuer[sizeof(s_issuer_rvt)];
_rReader.Read(offset + 0x140, sizeof(issuer), issuer);
if (!memcmp(issuer, s_issuer_rvt, sizeof(s_issuer_rvt)))
{
// RVT issuer. Use the RVT (debug) master key.
mbedtls_aes_setkey_dec(&AES_ctx, s_master_key_rvt, 128);
}
else
{
// Issue: 6813
// Magic value is at partition's offset + 0x1f1 (1byte)
// If encrypted with the Korean key, the magic value would be 1
// Otherwise it is zero
u8 using_korean_key = 0;
_rReader.Read(offset + 0x1f1, sizeof(u8), &using_korean_key);
u8 region = 0;
_rReader.Read(0x3, sizeof(u8), &region);
mbedtls_aes_setkey_dec(
&AES_ctx, (using_korean_key == 1 && region == 'K' ? s_master_key_korean : s_master_key),
128);
}
mbedtls_aes_crypt_cbc(&AES_ctx, MBEDTLS_AES_DECRYPT, 16, IV, SubKey, VolumeKey);
}