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exo2: first pass at backwards-compat

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This commit is contained in:
Michael Scire
2020-06-11 19:17:20 -07:00
committed by SciresM
parent 42f1a3bf60
commit da4107996a
9 changed files with 195 additions and 48 deletions
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11
exosphere/program/source/smc/secmon_smc_device_unique_data.cpp
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@@ -90,13 +90,13 @@ namespace ams::secmon::smc {
}
bool DecryptDeviceUniqueData(void *dst, size_t dst_size, u8 *out_device_id_high, const void *seal_key_source, size_t seal_key_source_size, const void *access_key, size_t access_key_size, const void *key_source, size_t key_source_size, const void *src, size_t src_size) {
bool DecryptDeviceUniqueData(void *dst, size_t dst_size, u8 *out_device_id_high, const void *seal_key_source, size_t seal_key_source_size, const void *access_key, size_t access_key_size, const void *key_source, size_t key_source_size, const void *src, size_t src_size, bool enforce_device_unique) {
/* Determine how much decrypted data there will be. */
const size_t enc_size = src_size - DeviceUniqueDataOuterMetaSize;
const size_t enc_size = src_size - (enforce_device_unique ? DeviceUniqueDataOuterMetaSize : DeviceUniqueDataIvSize);
const size_t dec_size = enc_size - DeviceUniqueDataInnerMetaSize;
/* Ensure that our sizes are allowed. */
AMS_ABORT_UNLESS(src_size > DeviceUniqueDataTotalMetaSize);
AMS_ABORT_UNLESS(src_size > (enforce_device_unique ? DeviceUniqueDataTotalMetaSize : DeviceUniqueDataIvSize));
AMS_ABORT_UNLESS(dst_size >= enc_size);
/* Determine the extents of the data. */
@@ -120,6 +120,11 @@ namespace ams::secmon::smc {
/* Decrypt the data. */
ComputeAes128Ctr(dst, dst_size, pkg1::AesKeySlot_Smc, enc, enc_size, temp_iv, DeviceUniqueDataIvSize);
/* If we're not enforcing device unique, there's no mac/device id. */
if (!enforce_device_unique) {
return true;
}
/* Compute the gmac. */
ComputeGmac(calc_mac, DeviceUniqueDataMacSize, dst, enc_size, temp_iv, DeviceUniqueDataIvSize);