mirror of
https://github.com/aaru-dps/Aaru.Server.git
synced 2025-12-16 19:24:27 +00:00
202 lines
8.6 KiB
C#
202 lines
8.6 KiB
C#
|
using System;
|
||
|
|
using System.IO;
|
||
|
|
using System.Text;
|
||
|
|
using System.Collections.Generic;
|
||
|
|
using FileSystemIDandChk;
|
||
|
|
|
||
|
|
namespace FileSystemIDandChk.PartPlugins
|
||
|
|
{
|
||
|
|
class AppleMap : PartPlugin
|
||
|
|
{
|
||
|
|
public AppleMap (PluginBase Core)
|
||
|
|
{
|
||
|
|
base.Name = "Apple Partition Map";
|
||
|
|
base.PluginUUID = new Guid("ffe4b4e9-82ed-4761-af49-8bade4081d10");
|
||
|
|
}
|
||
|
|
|
||
|
|
public override bool GetInformation (FileStream stream, out List<Partition> partitions)
|
||
|
|
{
|
||
|
|
byte[] sixteen_bits = new byte[2];
|
||
|
|
byte[] thirtytwo_bits = new byte[4];
|
||
|
|
byte[] sixteen_bytes = new byte[16];
|
||
|
|
byte[] thirtytwo_bytes = new byte[32];
|
||
|
|
|
||
|
|
ulong apm_entries;
|
||
|
|
|
||
|
|
partitions = new List<Partition>();
|
||
|
|
|
||
|
|
AppleMapBootEntry APMB = new AppleMapBootEntry();
|
||
|
|
AppleMapPartitionEntry APMEntry = new AppleMapPartitionEntry();
|
||
|
|
|
||
|
|
stream.Seek(0, SeekOrigin.Begin);
|
||
|
|
stream.Read(sixteen_bits, 0, 2);
|
||
|
|
sixteen_bits = Swapping.SwapTwoBytes(sixteen_bits);
|
||
|
|
APMB.signature = BitConverter.ToUInt16(sixteen_bits, 0);
|
||
|
|
|
||
|
|
if(APMB.signature != 0x4552)
|
||
|
|
return false; // Not an Apple Partition Map
|
||
|
|
|
||
|
|
stream.Read(sixteen_bits, 0, 2);
|
||
|
|
sixteen_bits = Swapping.SwapTwoBytes(sixteen_bits);
|
||
|
|
APMB.sector_size = BitConverter.ToUInt16(sixteen_bits, 0);
|
||
|
|
|
||
|
|
stream.Seek(APMB.sector_size, SeekOrigin.Begin); // Seek to first entry
|
||
|
|
stream.Read(sixteen_bits, 0, 2);
|
||
|
|
sixteen_bits = Swapping.SwapTwoBytes(sixteen_bits);
|
||
|
|
APMEntry.signature = BitConverter.ToUInt16(sixteen_bits, 0);
|
||
|
|
if(APMEntry.signature != 0x504D && APMEntry.signature != 0x5453) // It should have partition entry signature
|
||
|
|
return false;
|
||
|
|
|
||
|
|
stream.Seek(2, SeekOrigin.Current); // Skip reserved1
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.entries = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
if(APMEntry.entries <= 1) // It should have more than one entry
|
||
|
|
return false;
|
||
|
|
|
||
|
|
stream.Seek(4, SeekOrigin.Current); // Skip start, we don't need it
|
||
|
|
stream.Seek(4, SeekOrigin.Current); // Skip sectors, we don't need it
|
||
|
|
stream.Seek(32, SeekOrigin.Current); // Skip name, we don't ned it
|
||
|
|
|
||
|
|
stream.Read(thirtytwo_bytes, 0, 32);
|
||
|
|
APMEntry.type = StringHandlers.CToString(thirtytwo_bytes);
|
||
|
|
if(APMEntry.type != "Apple_partition_map") // APM self-describes, if not, this is incorrect
|
||
|
|
return false;
|
||
|
|
|
||
|
|
apm_entries = APMEntry.entries;
|
||
|
|
|
||
|
|
for(ulong i = 2; i <= apm_entries; i++) // For each partition
|
||
|
|
{
|
||
|
|
APMEntry = new AppleMapPartitionEntry();
|
||
|
|
|
||
|
|
stream.Seek((long)(APMB.sector_size*i), SeekOrigin.Begin); // Seek to partition descriptor
|
||
|
|
|
||
|
|
stream.Read(sixteen_bits, 0, 2);
|
||
|
|
sixteen_bits = Swapping.SwapTwoBytes(sixteen_bits);
|
||
|
|
APMEntry.signature = BitConverter.ToUInt16(sixteen_bits, 0);
|
||
|
|
if(APMEntry.signature == 0x504D || APMEntry.signature == 0x5453) // It should have partition entry signature
|
||
|
|
{
|
||
|
|
Partition _partition = new Partition();
|
||
|
|
StringBuilder sb = new StringBuilder();
|
||
|
|
|
||
|
|
stream.Seek(2, SeekOrigin.Current); // Skip reserved1
|
||
|
|
stream.Seek(4, SeekOrigin.Current); // Skip entries
|
||
|
|
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.start = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.sectors = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bytes, 0, 32);
|
||
|
|
APMEntry.name = StringHandlers.CToString(thirtytwo_bytes);
|
||
|
|
stream.Read(thirtytwo_bytes, 0, 32);
|
||
|
|
APMEntry.type = StringHandlers.CToString(thirtytwo_bytes);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.first_data_block = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.data_sectors = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.status = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.first_boot_block = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.boot_size = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.load_address = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Seek(4, SeekOrigin.Current);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.entry_point = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Seek(4, SeekOrigin.Current);
|
||
|
|
stream.Read(thirtytwo_bits, 0, 4);
|
||
|
|
thirtytwo_bits = Swapping.SwapFourBytes(thirtytwo_bits);
|
||
|
|
APMEntry.checksum = BitConverter.ToUInt32(thirtytwo_bits, 0);
|
||
|
|
stream.Read(sixteen_bytes, 0, 16);
|
||
|
|
APMEntry.processor = StringHandlers.CToString(sixteen_bytes);
|
||
|
|
|
||
|
|
_partition.PartitionSequence = i;
|
||
|
|
_partition.PartitionType = APMEntry.type;
|
||
|
|
_partition.PartitionName = APMEntry.name;
|
||
|
|
_partition.PartitionStart = APMEntry.start * APMB.sector_size;
|
||
|
|
_partition.PartitionLength = APMEntry.sectors * APMB.sector_size;
|
||
|
|
|
||
|
|
sb.AppendLine("Partition flags:");
|
||
|
|
if((APMEntry.status & 0x01) == 0x01)
|
||
|
|
sb.AppendLine("Partition is valid.");
|
||
|
|
if((APMEntry.status & 0x02) == 0x02)
|
||
|
|
sb.AppendLine("Partition entry is not available.");
|
||
|
|
if((APMEntry.status & 0x04) == 0x04)
|
||
|
|
sb.AppendLine("Partition is mounted.");
|
||
|
|
if((APMEntry.status & 0x08) == 0x08)
|
||
|
|
sb.AppendLine("Partition is bootable.");
|
||
|
|
if((APMEntry.status & 0x10) == 0x10)
|
||
|
|
sb.AppendLine("Partition is readable.");
|
||
|
|
if((APMEntry.status & 0x20) == 0x20)
|
||
|
|
sb.AppendLine("Partition is writable.");
|
||
|
|
if((APMEntry.status & 0x40) == 0x40)
|
||
|
|
sb.AppendLine("Partition's boot code is position independent.");
|
||
|
|
|
||
|
|
if((APMEntry.status & 0x08) == 0x08)
|
||
|
|
{
|
||
|
|
sb.AppendFormat("First boot sector: {0}", APMEntry.first_boot_block).AppendLine();
|
||
|
|
sb.AppendFormat("Boot is {0} bytes.", APMEntry.boot_size).AppendLine();
|
||
|
|
sb.AppendFormat("Boot load address: 0x{0:X8}", APMEntry.load_address).AppendLine();
|
||
|
|
sb.AppendFormat("Boot entry point: 0x{0:X8}", APMEntry.entry_point).AppendLine();
|
||
|
|
sb.AppendFormat("Boot code checksum: 0x{0:X8}", APMEntry.checksum).AppendLine();
|
||
|
|
sb.AppendFormat("Processor: {0}", APMEntry.processor).AppendLine();
|
||
|
|
}
|
||
|
|
|
||
|
|
_partition.PartitionDescription = sb.ToString();
|
||
|
|
|
||
|
|
if((APMEntry.status & 0x01) == 0x01)
|
||
|
|
partitions.Add(_partition);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
public struct AppleMapBootEntry
|
||
|
|
{
|
||
|
|
public UInt16 signature; // Signature ("ER")
|
||
|
|
public UInt16 sector_size; // Byter per sector
|
||
|
|
public UInt32 sectors; // Sectors of the disk
|
||
|
|
public UInt16 reserved1; // Reserved
|
||
|
|
public UInt16 reserved2; // Reserved
|
||
|
|
public UInt32 reserved3; // Reserved
|
||
|
|
public UInt16 driver_entries; // Number of entries of the driver descriptor
|
||
|
|
public UInt32 first_driver_blk; // First sector of the driver
|
||
|
|
public UInt16 driver_size; // Size in 512bytes sectors of the driver
|
||
|
|
public UInt16 operating_system; // Operating system (MacOS = 1)
|
||
|
|
}
|
||
|
|
|
||
|
|
public struct AppleMapPartitionEntry
|
||
|
|
{
|
||
|
|
public UInt16 signature; // Signature ("PM" or "TS")
|
||
|
|
public UInt16 reserved1; // Reserved
|
||
|
|
public UInt32 entries; // Number of entries on the partition map, each one sector
|
||
|
|
public UInt32 start; // First sector of the partition
|
||
|
|
public UInt32 sectors; // Number of sectos of the partition
|
||
|
|
public string name; // Partition name, 32 bytes, null-padded
|
||
|
|
public string type; // Partition type. 32 bytes, null-padded
|
||
|
|
public UInt32 first_data_block; // First sector of the data area
|
||
|
|
public UInt32 data_sectors; // Number of sectors of the data area
|
||
|
|
public UInt32 status; // Partition status
|
||
|
|
public UInt32 first_boot_block; // First sector of the boot code
|
||
|
|
public UInt32 boot_size; // Size in bytes of the boot code
|
||
|
|
public UInt32 load_address; // Load address of the boot code
|
||
|
|
public UInt32 reserved2; // Reserved
|
||
|
|
public UInt32 entry_point; // Entry point of the boot code
|
||
|
|
public UInt32 reserved3; // Reserved
|
||
|
|
public UInt32 checksum; // Boot code checksum
|
||
|
|
public string processor; // Processor type, 16 bytes, null-padded
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|