internal GPT(byte[] GPTBuffer)
{
this.GPTBuffer = GPTBuffer;
UInt32?TempHeaderOffset = ByteOperations.FindAscii(GPTBuffer, "EFI PART");
if (TempHeaderOffset == null)
{
throw new WPinternalsException("Bad GPT");
}
HeaderOffset = (UInt32)TempHeaderOffset;
HeaderSize = ByteOperations.ReadUInt32(GPTBuffer, HeaderOffset + 0x0C);
TableOffset = HeaderOffset + 0x200;
FirstUsableSector = ByteOperations.ReadUInt64(GPTBuffer, HeaderOffset + 0x28);
LastUsableSector = ByteOperations.ReadUInt64(GPTBuffer, HeaderOffset + 0x30);
MaxPartitions = ByteOperations.ReadUInt32(GPTBuffer, HeaderOffset + 0x50);
PartitionEntrySize = ByteOperations.ReadUInt32(GPTBuffer, HeaderOffset + 0x54);
TableSize = MaxPartitions * PartitionEntrySize;
if ((TableOffset + TableSize) > GPTBuffer.Length)
{
throw new WPinternalsException("Bad GPT");
}
UInt32 PartitionOffset = TableOffset;
while (PartitionOffset < (TableOffset + TableSize))
{
string Name = ByteOperations.ReadUnicodeString(GPTBuffer, PartitionOffset + 0x38, 0x48).TrimEnd(new char[] { (char)0, ' ' });
if (Name.Length == 0)
{
break;
}
Partition CurrentPartition = new Partition();
CurrentPartition.Name = Name;
CurrentPartition.FirstSector = ByteOperations.ReadUInt64(GPTBuffer, PartitionOffset + 0x20);
CurrentPartition.LastSector = ByteOperations.ReadUInt64(GPTBuffer, PartitionOffset + 0x28);
CurrentPartition.PartitionTypeGuid = ByteOperations.ReadGuid(GPTBuffer, PartitionOffset + 0x00);
CurrentPartition.PartitionGuid = ByteOperations.ReadGuid(GPTBuffer, PartitionOffset + 0x10);
CurrentPartition.Attributes = ByteOperations.ReadUInt64(GPTBuffer, PartitionOffset + 0x30);
Partitions.Add(CurrentPartition);
PartitionOffset += PartitionEntrySize;
}
HasChanged = false;
}
internal static byte[] Decompress(byte[] Input, UInt32 Offset, UInt32 InputSize)
{
byte[] Properties = new byte[5];
Buffer.BlockCopy(Input, (int)Offset, Properties, 0, 5);
UInt64 OutputSize = ByteOperations.ReadUInt64(Input, Offset + 5);
SevenZip.Compression.LZMA.Decoder Coder = new SevenZip.Compression.LZMA.Decoder();
Coder.SetDecoderProperties(Properties);
MemoryStream InStream = new MemoryStream(Input, (int)Offset + 0x0D, (int)InputSize - 0x0D);
byte[] Output = new byte[OutputSize];
MemoryStream OutStream = new MemoryStream(Output, true);
Coder.Code(InStream, OutStream, (Int64)InputSize - 0x0D, (Int64)OutputSize, null);
OutStream.Flush();
OutStream.Close();
InStream.Close();
return(Output);
}
internal QualcommPartition(byte[] Binary, uint Offset = 0)
{
#if DEBUG
System.Diagnostics.Debug.Print("Loader: " + Converter.ConvertHexToString(new SHA256Managed().ComputeHash(Binary, 0, Binary.Length), ""));
#endif
this.Binary = Binary;
byte[] LongHeaderPattern = new byte[] { 0xD1, 0xDC, 0x4B, 0x84, 0x34, 0x10, 0xD7, 0x73, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
byte[] LongHeaderMask = new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
if (ByteOperations.FindPattern(Binary, Offset, 4, new byte[] { 0x7F, 0x45, 0x4C, 0x46 }, new byte[] { 0x00, 0x00, 0x00, 0x00 }, null) == 0)
{
// This is an ELF image
// First program header is a reference to the elf-header
// Second program header is a reference to the signed hash-table
HeaderType = QualcommPartitionHeaderType.Short;
UInt32 ProgramHeaderOffset;
UInt16 ProgramHeaderEntrySize;
UInt32 HashTableProgramHeaderOffset;
if (Binary[Offset + 0x04] == 1)
{
// 32-bit elf image
ProgramHeaderOffset = Offset + ByteOperations.ReadUInt32(Binary, Offset + 0x1c);
ProgramHeaderEntrySize = ByteOperations.ReadUInt16(Binary, Offset + 0x2a);
HashTableProgramHeaderOffset = ProgramHeaderOffset + ProgramHeaderEntrySize;
ImageOffset = Offset + ByteOperations.ReadUInt32(Binary, HashTableProgramHeaderOffset + 0x04);
HeaderOffset = ImageOffset + 8;
}
else if (Binary[Offset + 0x04] == 2)
{
// 64-bit elf image
ProgramHeaderOffset = Offset + ByteOperations.ReadUInt32(Binary, Offset + 0x20);
ProgramHeaderEntrySize = ByteOperations.ReadUInt16(Binary, Offset + 0x36);
HashTableProgramHeaderOffset = ProgramHeaderOffset + ProgramHeaderEntrySize;
ImageOffset = Offset + (UInt32)ByteOperations.ReadUInt64(Binary, HashTableProgramHeaderOffset + 0x08);
HeaderOffset = ImageOffset + 8;
}
else
{
throw new WPinternalsException("Invalid programmer");
}
}
else if (ByteOperations.FindPattern(Binary, Offset, (uint)LongHeaderPattern.Length, LongHeaderPattern, LongHeaderMask, null) == null)
{
HeaderType = QualcommPartitionHeaderType.Short;
ImageOffset = Offset;
HeaderOffset = ImageOffset + 8;
}
else
{
HeaderType = QualcommPartitionHeaderType.Long;
ImageOffset = Offset;
HeaderOffset = ImageOffset + (uint)LongHeaderPattern.Length;
}
if (ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X00) != 0)
{
ImageOffset = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X00);
}
else if (HeaderType == QualcommPartitionHeaderType.Short)
{
ImageOffset += 0x28;
}
else
{
ImageOffset += 0x50;
}
ImageAddress = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X04);
ImageSize = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X08);
CodeSize = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X0C);
SignatureAddress = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X10);
SignatureSize = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X14);
SignatureOffset = SignatureAddress - ImageAddress + ImageOffset;
CertificatesAddress = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X18);
CertificatesSize = ByteOperations.ReadUInt32(Binary, HeaderOffset + 0X1C);
CertificatesOffset = CertificatesAddress - ImageAddress + ImageOffset;
uint CurrentCertificateOffset = CertificatesOffset;
uint CertificateSize = 0;
while (CurrentCertificateOffset < (CertificatesOffset + CertificatesSize))
{
if ((Binary[CurrentCertificateOffset] == 0x30) && (Binary[CurrentCertificateOffset + 1] == 0x82))
{
CertificateSize = (uint)(Binary[CurrentCertificateOffset + 2] * 0x100) + Binary[CurrentCertificateOffset + 3] + 4; // Big endian!
if ((CurrentCertificateOffset + CertificateSize) == (CertificatesOffset + CertificatesSize))
{
// This is the last certificate. So this is the root key.
RootKeyHash = new SHA256Managed().ComputeHash(Binary, (int)CurrentCertificateOffset, (int)CertificateSize);
#if DEBUG
System.Diagnostics.Debug.Print("RKH: " + Converter.ConvertHexToString(RootKeyHash, ""));
#endif
}
#if DEBUG
else
{
System.Diagnostics.Debug.Print("Cert: " + Converter.ConvertHexToString(new SHA256Managed().ComputeHash(Binary, (int)CurrentCertificateOffset, (int)CertificateSize), ""));
}
#endif
CurrentCertificateOffset += CertificateSize;
}
else
{
if ((RootKeyHash == null) && (CurrentCertificateOffset > CertificatesOffset))
{
CurrentCertificateOffset -= CertificateSize;
// This is the last certificate. So this is the root key.
RootKeyHash = new SHA256Managed().ComputeHash(Binary, (int)CurrentCertificateOffset, (int)CertificateSize);
#if DEBUG
System.Diagnostics.Debug.Print("RKH: " + Converter.ConvertHexToString(RootKeyHash, ""));
#endif
}
break;
}
}
}
