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WiiSave: Fix save signing

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The system menu is passing the SHA1 hash of the save data to ES
to sign, not the save data itself.

Fixes save import in the System Menu for saves that were exported
by Dolphin.
This commit is contained in:
Léo Lam 2019-05-07 01:02:38 +02:00
parent 6f6c7e5df0
commit 2740ff9a9d
1 changed files with 12 additions and 7 deletions
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19
Source/Core/Core/HW/WiiSave.cpp
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@ -15,6 +15,7 @@
#include <cstdio>
#include <cstring>
#include <mbedtls/md5.h>
#include <mbedtls/sha1.h>
#include <memory>
#include <optional>
#include <string>
@ -403,17 +404,21 @@ private:
return false;
// Read data to sign.
const u32 data_size = bk_header->size_of_files + sizeof(BkHeader);
auto data = std::make_unique<u8[]>(data_size);
m_file.Seek(sizeof(Header), SEEK_SET);
if (!m_file.ReadBytes(data.get(), data_size))
return false;
std::array<u8, 20> data_sha1;
{
const u32 data_size = bk_header->size_of_files + sizeof(BkHeader);
auto data = std::make_unique<u8[]>(data_size);
m_file.Seek(sizeof(Header), SEEK_SET);
if (!m_file.ReadBytes(data.get(), data_size))
return false;
mbedtls_sha1(data.get(), data_size, data_sha1.data());
}
// Sign the data.
IOS::CertECC ap_cert;
Common::ec::Signature ap_sig;
m_iosc.Sign(ap_sig.data(), reinterpret_cast<u8*>(&ap_cert), Titles::SYSTEM_MENU, data.get(),
data_size);
m_iosc.Sign(ap_sig.data(), reinterpret_cast<u8*>(&ap_cert), Titles::SYSTEM_MENU,
data_sha1.data(), static_cast<u32>(data_sha1.size()));
// Write signatures.
if (!m_file.Seek(0, SEEK_END))