mirror of https://github.com/AxioDL/nod.git
396 lines
11 KiB
C++
396 lines
11 KiB
C++
#include <stdio.h>
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#include <string.h>
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#include "NOD/DiscWii.hpp"
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#include "NOD/aes.hpp"
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namespace NOD
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{
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/* Not much of a secret anymore I suppose */
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static const uint8_t COMMON_KEYS[2][16] =
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{
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/* Normal */
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{0xeb, 0xe4, 0x2a, 0x22,
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0x5e, 0x85, 0x93, 0xe4,
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0x48, 0xd9, 0xc5, 0x45,
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0x73, 0x81, 0xaa, 0xf7},
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/* Korean */
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{0x63, 0xb8, 0x2b, 0xb4,
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0xf4, 0x61, 0x4e, 0x2e,
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0x13, 0xf2, 0xfe, 0xfb,
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0xba, 0x4c, 0x9b, 0x7e}
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};
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class PartitionWii : public DiscBase::IPartition
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{
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enum SigType : uint32_t
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{
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SRSA_4096 = 0x00010000,
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SRSA_2048 = 0x00010001,
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SELIPTICAL_CURVE = 0x00010002
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};
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enum KeyType : uint32_t
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{
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KRSA_4096 = 0x00000000,
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KRSA_2048 = 0x00000001
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};
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struct Ticket
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{
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uint32_t sigType;
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char sig[256];
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char padding[60];
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char sigIssuer[64];
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char ecdh[60];
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char padding1[3];
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unsigned char encKey[16];
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char padding2;
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char ticketId[8];
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char consoleId[4];
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char titleId[8];
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char padding3[2];
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uint16_t ticketVersion;
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uint32_t permittedTitlesMask;
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uint32_t permitMask;
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char titleExportAllowed;
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char commonKeyIdx;
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char padding4[48];
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char contentAccessPermissions[64];
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char padding5[2];
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struct TimeLimit
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{
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uint32_t enableTimeLimit;
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uint32_t timeLimit;
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} timeLimits[8];
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void read(IDiscIO::IReadStream& s)
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{
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s.read(this, 676);
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sigType = SBig(sigType);
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ticketVersion = SBig(ticketVersion);
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permittedTitlesMask = SBig(permittedTitlesMask);
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permitMask = SBig(permitMask);
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for (size_t t=0 ; t<8 ; ++t)
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{
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timeLimits[t].enableTimeLimit = SBig(timeLimits[t].enableTimeLimit);
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timeLimits[t].timeLimit = SBig(timeLimits[t].timeLimit);
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}
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}
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} m_ticket;
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struct TMD
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{
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SigType sigType;
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char sig[256];
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char padding[60];
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char sigIssuer[64];
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char version;
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char caCrlVersion;
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char signerCrlVersion;
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char padding1;
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uint32_t iosIdMajor;
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uint32_t iosIdMinor;
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uint32_t titleIdMajor;
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char titleIdMinor[4];
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uint32_t titleType;
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uint16_t groupId;
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char padding2[62];
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uint32_t accessFlags;
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uint16_t titleVersion;
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uint16_t numContents;
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uint16_t bootIdx;
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uint16_t padding3;
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struct Content
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{
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uint32_t id;
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uint16_t index;
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uint16_t type;
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uint64_t size;
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char hash[20];
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void read(IDiscIO::IReadStream& s)
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{
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s.read(this, 36);
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id = SBig(id);
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index = SBig(index);
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type = SBig(type);
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size = SBig(size);
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}
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};
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std::vector<Content> contents;
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void read(IDiscIO::IReadStream& s)
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{
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s.read(this, 484);
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sigType = (SigType)SBig(sigType);
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iosIdMajor = SBig(iosIdMajor);
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iosIdMinor = SBig(iosIdMinor);
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titleIdMajor = SBig(titleIdMajor);
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titleType = SBig(titleType);
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groupId = SBig(groupId);
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accessFlags = SBig(accessFlags);
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titleVersion = SBig(titleVersion);
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numContents = SBig(numContents);
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bootIdx = SBig(bootIdx);
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for (uint16_t c=0 ; c<numContents ; ++c)
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{
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contents.emplace_back();
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contents.back().read(s);
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}
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}
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} m_tmd;
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struct Certificate
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{
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SigType sigType;
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char sig[512];
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char issuer[64];
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KeyType keyType;
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char subject[64];
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char key[512];
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uint32_t modulus;
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uint32_t pubExp;
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void read(IDiscIO::IReadStream& s)
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{
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s.read(&sigType, 4);
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sigType = (SigType)SBig(sigType);
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if (sigType == SRSA_4096)
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s.read(sig, 512);
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else if (sigType == SRSA_2048)
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s.read(sig, 256);
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else if (sigType == SELIPTICAL_CURVE)
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s.read(sig, 64);
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s.seek(60, SEEK_CUR);
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s.read(issuer, 64);
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s.read(&keyType, 4);
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s.read(subject, 64);
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keyType = (KeyType)SBig(keyType);
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if (keyType == KRSA_4096)
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s.read(key, 512);
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else if (keyType == KRSA_2048)
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s.read(key, 256);
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s.read(&modulus, 8);
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modulus = SBig(modulus);
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pubExp = SBig(pubExp);
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s.seek(52, SEEK_CUR);
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}
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};
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Certificate m_caCert;
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Certificate m_tmdCert;
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Certificate m_ticketCert;
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uint64_t m_dataOff;
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uint8_t m_decKey[16];
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public:
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PartitionWii(const DiscWii& parent, Kind kind, uint64_t offset)
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: IPartition(parent, kind, offset)
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{
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std::unique_ptr<IDiscIO::IReadStream> s = parent.getDiscIO().beginReadStream(offset);
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m_ticket.read(*s.get());
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uint32_t tmdSize;
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s->read(&tmdSize, 4);
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tmdSize = SBig(tmdSize);
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uint32_t tmdOff;
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s->read(&tmdOff, 4);
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tmdOff = SBig(tmdOff) << 2;
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uint32_t certChainSize;
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s->read(&certChainSize, 4);
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certChainSize = SBig(certChainSize);
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uint32_t certChainOff;
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s->read(&certChainOff, 4);
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certChainOff = SBig(certChainOff) << 2;
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uint32_t globalHashTableOff;
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s->read(&globalHashTableOff, 4);
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globalHashTableOff = SBig(globalHashTableOff) << 2;
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uint32_t dataOff;
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s->read(&dataOff, 4);
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dataOff = SBig(dataOff) << 2;
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m_dataOff = offset + dataOff;
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uint32_t dataSize;
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s->read(&dataSize, 4);
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dataSize = SBig(dataSize) << 2;
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s->seek(offset + tmdOff);
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m_tmd.read(*s.get());
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s->seek(offset + certChainOff);
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m_caCert.read(*s.get());
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m_tmdCert.read(*s.get());
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m_ticketCert.read(*s.get());
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/* Decrypt title key */
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std::unique_ptr<IAES> aes = NewAES();
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uint8_t iv[16] = {};
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memcpy(iv, m_ticket.titleId, 8);
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aes->setKey(COMMON_KEYS[(int)m_ticket.commonKeyIdx]);
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aes->decrypt(iv, m_ticket.encKey, m_decKey, 16);
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/* Wii-specific header reads (now using title key to decrypt) */
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std::unique_ptr<IPartReadStream> ds = beginReadStream(0x420);
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uint32_t vals[3];
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ds->read(vals, 12);
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m_dolOff = SBig(vals[0]) << 2;
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m_fstOff = SBig(vals[1]) << 2;
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m_fstSz = SBig(vals[2]) << 2;
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ds->seek(0x2440 + 0x14);
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ds->read(vals, 8);
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m_apploaderSz = 32 + SBig(vals[0]) + SBig(vals[1]);
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/* Yay files!! */
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parseFST(*ds.get());
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}
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class PartReadStream : public IPartReadStream
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{
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std::unique_ptr<IAES> m_aes;
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const PartitionWii& m_parent;
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uint64_t m_baseOffset;
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uint64_t m_offset;
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std::unique_ptr<IDiscIO::IReadStream> m_dio;
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size_t m_curBlock = SIZE_MAX;
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uint8_t m_encBuf[0x8000];
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uint8_t m_decBuf[0x7c00];
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void decryptBlock()
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{
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m_dio->read(m_encBuf, 0x8000);
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m_aes->decrypt(&m_encBuf[0x3d0], &m_encBuf[0x400], m_decBuf, 0x7c00);
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}
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public:
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PartReadStream(const PartitionWii& parent, uint64_t baseOffset, uint64_t offset)
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: m_aes(NewAES()), m_parent(parent), m_baseOffset(baseOffset), m_offset(offset)
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{
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m_aes->setKey(parent.m_decKey);
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size_t block = m_offset / 0x7c00;
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m_dio = m_parent.m_parent.getDiscIO().beginReadStream(m_baseOffset + block * 0x8000);
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decryptBlock();
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m_curBlock = block;
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}
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void seek(int64_t offset, int whence)
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{
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if (whence == SEEK_SET)
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m_offset = offset;
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else if (whence == SEEK_CUR)
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m_offset += offset;
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else
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return;
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size_t block = m_offset / 0x7c00;
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m_dio->seek(m_baseOffset + block * 0x8000);
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if (block != m_curBlock)
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{
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decryptBlock();
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m_curBlock = block;
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}
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}
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uint64_t position() const {return m_offset;}
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uint64_t read(void* buf, uint64_t length)
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{
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size_t block = m_offset / 0x7c00;
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size_t cacheOffset = m_offset % 0x7c00;
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uint64_t cacheSize;
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uint64_t rem = length;
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uint8_t* dst = (uint8_t*)buf;
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while (rem)
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{
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if (block != m_curBlock)
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{
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decryptBlock();
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m_curBlock = block;
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}
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cacheSize = rem;
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if (cacheSize + cacheOffset > 0x7c00)
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cacheSize = 0x7c00 - cacheOffset;
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memcpy(dst, m_decBuf + cacheOffset, cacheSize);
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dst += cacheSize;
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rem -= cacheSize;
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cacheOffset = 0;
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++block;
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}
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m_offset += length;
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return dst - (uint8_t*)buf;
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}
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};
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std::unique_ptr<IPartReadStream> beginReadStream(uint64_t offset) const
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{
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return std::unique_ptr<IPartReadStream>(new PartReadStream(*this, m_dataOff, offset));
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}
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uint64_t normalizeOffset(uint64_t anOffset) const {return anOffset << 2;}
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};
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DiscWii::DiscWii(std::unique_ptr<IDiscIO>&& dio)
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: DiscBase(std::move(dio))
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{
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/* Read partition info */
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struct PartInfo {
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uint32_t partCount;
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uint32_t partInfoOff;
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struct Part
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{
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uint32_t partDataOff;
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enum Type : uint32_t
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{
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PART_DATA = 0,
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PART_UPDATE = 1,
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PART_CHANNEL = 2
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} partType;
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} parts[4];
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PartInfo(IDiscIO& dio)
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{
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std::unique_ptr<IDiscIO::IReadStream> s = dio.beginReadStream(0x40000);
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s->read(this, 32);
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partCount = SBig(partCount);
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partInfoOff = SBig(partInfoOff);
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s->seek(partInfoOff << 2);
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for (uint32_t p=0 ; p<partCount && p<4 ; ++p)
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{
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s->read(&parts[p], 8);
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parts[p].partDataOff = SBig(parts[p].partDataOff);
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parts[p].partType = (Part::Type)SBig(parts[p].partType);
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}
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}
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} partInfo(*m_discIO.get());
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/* Iterate for data partition */
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m_partitions.reserve(partInfo.partCount);
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for (uint32_t p=0 ; p<partInfo.partCount && p<4 ; ++p)
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{
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PartInfo::Part& part = partInfo.parts[p];
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IPartition::Kind kind;
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if (part.partType == PartInfo::Part::PART_DATA)
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kind = IPartition::PART_DATA;
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else if (part.partType == PartInfo::Part::PART_UPDATE)
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kind = IPartition::PART_UPDATE;
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else if (part.partType == PartInfo::Part::PART_CHANNEL)
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kind = IPartition::PART_CHANNEL;
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else
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throw std::runtime_error("Invalid partition type");
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m_partitions.emplace_back(new PartitionWii(*this, kind, part.partDataOff << 2));
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}
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}
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bool DiscWii::commit()
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{
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return false;
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}
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}
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