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DiscIO: Export GetKeyFromTicket 

This function has more uses than just in DiscIO (e.g. WFS).
This commit is contained in:
Pierre Bourdon 2017-01-02 05:32:08 +01:00
parent 650a1fdb1f
commit 334ddf754e
2 changed files with 22 additions and 24 deletions
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42
Source/Core/DiscIO/NANDContentLoader.cpp
View File

@ -60,6 +60,17 @@ std::vector<u8> SignedTicketToTicket(const std::vector<u8>& signed_ticket)
std::copy(signed_ticket.begin() + entry_offset, signed_ticket.end(), ticket.begin());
return ticket;
}
std::vector<u8> AESDecode(const u8* key, u8* iv, const u8* src, u32 size)
{
mbedtls_aes_context aes_ctx;
std::vector<u8> buffer(size);
mbedtls_aes_setkey_dec(&aes_ctx, key, 128);
mbedtls_aes_crypt_cbc(&aes_ctx, MBEDTLS_AES_DECRYPT, size, iv, src, buffer.data());
return buffer;
}
}
CNANDContentData::~CNANDContentData() = default;
@ -323,27 +334,6 @@ void CNANDContentLoader::InitializeContentEntries(const std::vector<u8>& tmd,
}
}
std::vector<u8> CNANDContentLoader::AESDecode(const u8* key, u8* iv, const u8* src, u32 size)
{
mbedtls_aes_context aes_ctx;
std::vector<u8> buffer(size);
mbedtls_aes_setkey_dec(&aes_ctx, key, 128);
mbedtls_aes_crypt_cbc(&aes_ctx, MBEDTLS_AES_DECRYPT, size, iv, src, buffer.data());
return buffer;
}
std::vector<u8> CNANDContentLoader::GetKeyFromTicket(const std::vector<u8>& ticket)
{
const u8 common_key[16] = {0xeb, 0xe4, 0x2a, 0x22, 0x5e, 0x85, 0x93, 0xe4,
0x48, 0xd9, 0xc5, 0x45, 0x73, 0x81, 0xaa, 0xf7};
u8 iv[16] = {};
std::copy(&ticket[0x01DC], &ticket[0x01DC + 8], iv);
return AESDecode(common_key, iv, &ticket[0x01BF], 16);
}
DiscIO::Region CNANDContentLoader::GetRegion() const
{
if (!IsValid())
@ -606,4 +596,14 @@ std::vector<u8> FindTicket(u64 title_id)
return SignedTicketToTicket(signed_ticket);
}
std::vector<u8> GetKeyFromTicket(const std::vector<u8>& signed_ticket)
{
const u8 common_key[16] = {0xeb, 0xe4, 0x2a, 0x22, 0x5e, 0x85, 0x93, 0xe4,
0x48, 0xd9, 0xc5, 0x45, 0x73, 0x81, 0xaa, 0xf7};
u8 iv[16] = {};
std::copy(&signed_ticket[0x01DC], &signed_ticket[0x01DC + 8], iv);
return AESDecode(common_key, iv, &signed_ticket[0x01BF], 16);
}
} // namespace end

4
Source/Core/DiscIO/NANDContentLoader.h
View File

@ -25,6 +25,7 @@ enum class Region;
bool AddTicket(const std::vector<u8>& signed_ticket);
std::vector<u8> FindSignedTicket(u64 title_id);
std::vector<u8> FindTicket(u64 title_id);
std::vector<u8> GetKeyFromTicket(const std::vector<u8>& ticket);
class CNANDContentData
{
@ -112,9 +113,6 @@ private:
const std::vector<u8>& decrypted_title_key,
const std::vector<u8>& data_app);
static std::vector<u8> AESDecode(const u8* key, u8* iv, const u8* src, u32 size);
static std::vector<u8> GetKeyFromTicket(const std::vector<u8>& ticket);
bool m_Valid;
bool m_IsWAD;
std::string m_Path;