public static void Strip(string ebookPath, string outputDir, string name, string ccNumber)
{
if (string.IsNullOrEmpty(outputDir))
{
outputDir = Path.GetDirectoryName(ebookPath);
}
var ebook = new Pdb(ebookPath);
var processor = new EReaderProcessor(ebook, name, ccNumber);
outputDir = Path.Combine(outputDir, ebook.Filename);
if (!Directory.Exists(outputDir))
{
Directory.CreateDirectory(outputDir);
}
string path;
for (var i = 0; i < processor.numImagePages; i++)
{
var img = processor.GetImage(i);
path = Path.Combine(outputDir, img.filename);
using (var stream = File.Create(path))
stream.Write(img.content, 0, img.content.Length);
}
var pml = processor.GetText();
path = Path.Combine(outputDir, ebook.Filename + ".pml");
using (var stream = File.CreateText(path))
stream.Write(pml);
}
public EReaderPdb(Pdb pdbReader)
{
this.pdbReader = pdbReader;
byte[] headerRawData = pdbReader.GetSection(0);
if (headerRawData.Length != 132)
{
throw new FormatException("Unknown eReader header format.");
}
using (var stream = new MemoryStream(headerRawData))
{
var b = (byte)stream.ReadByte();
if (b > 1)
{
throw new FormatException(string.Format("Unknown DRM flag {0}", b));
}
haveDrm = b == 1;
b = (byte)stream.ReadByte();
compressionMethod = (EReaderCompression)b;
var buf = new byte[4];
stream.Read(buf, 0, 4); //unknown, should be 0x00000000
buf = new byte[2];
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
textEncoding = BitConverter.ToUInt16(buf, 0); //should be 2515 or 25152 for cp1251
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfSmallFontPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfLargeFontPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
nonTextFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfChapters = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfSmallFontIndexPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfLargeFontIndexPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfImages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfLinks = BitConverter.ToUInt16(buf, 0);
b = (byte)stream.ReadByte();
if (b > 1)
{
throw new FormatException(string.Format("Incorrect Metadata flag {0}", b));
}
haveMetadata = b == 1;
buf = new byte[3];
stream.Read(buf, 0, 3); //unknown, should be 0
buf = new byte[2];
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfFootnotes = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
numberOfSidebars = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
chapterIndexFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
magickValue = BitConverter.ToUInt16(buf, 0);
//if (magickValue != 2560) throw new FormatException(string.Format("Unknown Magick Value {0}", magickValue));
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
smallFontPageIndexeFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
largeFontPageIndexeFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
imageDataFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
linksFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
metadataFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2); //unknown, should be 0x0000
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
footnotesFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
sidebarFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian)
{
buf = buf.Reverse();
}
lastRecord = BitConverter.ToUInt16(buf, 0);
}
}
private EReaderProcessor(Pdb pdb, string name, string ccNumber)
{
if (!(pdb.Filetype == "PNRd" && pdb.Creator == "PPrs"))
{
throw new FormatException("Invalid eReader file.");
}
pdbReader = pdb;
var eReaderPdb = new EReaderPdb(pdbReader);
if (!eReaderPdb.HaveDrm)
{
throw new InvalidOperationException("File doesn't have DRM or have unknown DRM version: {0}!");
}
if (!(eReaderPdb.CompressionMethod == EReaderCompression.Drm1 || eReaderPdb.CompressionMethod == EReaderCompression.Drm2))
{
throw new InvalidOperationException($"Unsupported compression method or DRM version: {eReaderPdb.CompressionMethod}!");
}
data = pdbReader.GetSection(1);
var desEngine = GetDesEngine(data.Copy(0, 8));
var decryptedData = desEngine.TransformFinalBlock(data.Copy(-8), 0, 8);
var cookieShuf = decryptedData[0] << 24 | decryptedData[1] << 16 | decryptedData[2] << 8 | decryptedData[3];
var cookieSize = decryptedData[4] << 24 | decryptedData[5] << 16 | decryptedData[6] << 8 | decryptedData[7];
if (cookieShuf < 0x03 || cookieShuf > 0x14 || cookieSize < 0xf0 || cookieSize > 0x200)
{
throw new InvalidOperationException("Unsupportd eReader format");
}
var input = desEngine.TransformFinalBlock(data.Copy(-cookieSize), 0, cookieSize);
var r = UnshuffleData(input.SubRange(0, -8), cookieShuf);
//using (var stream = new FileStream(pdb.Filename+".eReaderSection1Dump", FileMode.Create, FileAccess.ReadWrite, FileShare.Read)) stream.Write(r, 0, r.Length);
var userKeyPart1 = Encoding.ASCII.GetBytes(FixUserName(name));
var userKeyPart2 = Encoding.ASCII.GetBytes(ccNumber.ToCharArray().Copy(-8));
long userKey;
using (var stream1 = new MemoryStream(userKeyPart1))
using (var stream2 = new MemoryStream(userKeyPart2))
{
userKey = new CRC32().GetCrc32(stream1) & 0xffffffff;
userKey = userKey << 32 | new CRC32().GetCrc32(stream2) & 0xffffffff;
}
var drmSubVersion = (ushort)(r[0] << 8 | r[1]);
numTextPages = (ushort)(r[2] << 8 | r[3]) - 1;
flags = r[4] << 24 | r[5] << 16 | r[6] << 8 | r[7];
firstImagePage = (ushort)(r[24] << 8 | r[25]);
numImagePages = (ushort)(r[26] << 8 | r[27]);
if ((flags & ReqdFlags) != ReqdFlags)
{
throw new InvalidOperationException($"Unsupported flags combination: {flags:x8}");
}
var userKeyArray = BitConverter.GetBytes(userKey);
if (BitConverter.IsLittleEndian)
{
userKeyArray = userKeyArray.Reverse();
}
desEngine = GetDesEngine(userKeyArray);
var encryptedKey = new byte[0];
var encryptedKeySha = new byte[0];
if (eReaderPdb.CompressionMethod == EReaderCompression.Drm1)
{
if (drmSubVersion != 13)
{
throw new InvalidOperationException($"Unknown eReader DRM subversion ID: {drmSubVersion}");
}
encryptedKey = r.Copy(44, 8);
encryptedKeySha = r.Copy(52, 20);
}
else if (eReaderPdb.CompressionMethod == EReaderCompression.Drm2)
{
encryptedKey = r.Copy(172, 8);
encryptedKeySha = r.Copy(56, 20);
}
contentKey = desEngine.TransformFinalBlock(encryptedKey, 0, encryptedKey.Length);
byte[] checkHash;
using (var sha1 = SHA1.Create())
checkHash = sha1.ComputeHash(contentKey);
if (!encryptedKeySha.SequenceEqual(checkHash))
{
var s = new StringBuilder();
for (var x = 0; x < r.Length - 8; x += 2)
{
for (var y = 0; y < (x - 20); y += 2)
{
if (TestKeyDecryption(desEngine, r, x, y))
{
s.AppendFormat("keyOffset={0}, hashOffset={1}\n", x, y);
}
}
for (var y = x + 8; y < (r.Length - 20); y += 2)
{
if (TestKeyDecryption(desEngine, r, x, y))
{
s.AppendFormat("keyOffset={0}, hashOffset={1}\n", x, y);
}
}
}
if (s.Length > 0)
{
throw new InvalidDataException("Key and/or KeyHash offset mismatch. Possible values:\n\n" + s);
}
throw new ArgumentException("Incorrect Name of Credit Card number.");
}
contentDecryptor = GetDesEngine(contentKey);
}
private EReaderProcessor(Pdb pdb, string name, string ccNumber)
{
if (!(pdb.Filetype == "PNRd" && pdb.Creator == "PPrs")) throw new FormatException("Invalid eReader file.");
pdbReader = pdb;
var eReaderPdb = new EReaderPdb(pdbReader);
if (!eReaderPdb.HaveDrm)
throw new InvalidOperationException("File doesn't have DRM or have unknown DRM version: {0}!");
if (!(eReaderPdb.CompressionMethod == EReaderCompression.Drm1 || eReaderPdb.CompressionMethod == EReaderCompression.Drm2))
throw new InvalidOperationException(string.Format("Unsupported compression method or DRM version: {0}!", eReaderPdb.CompressionMethod));
data = pdbReader.GetSection(1);
ICryptoTransform desEngine = GetDesEngine(data.Copy(0, 8));
byte[] decryptedData = desEngine.TransformFinalBlock(data.Copy(-8), 0, 8);
int cookieShuf = decryptedData[0] << 24 | decryptedData[1] << 16 | decryptedData[2] << 8 | decryptedData[3];
int cookieSize = decryptedData[4] << 24 | decryptedData[5] << 16 | decryptedData[6] << 8 | decryptedData[7];
if (cookieShuf < 0x03 || cookieShuf > 0x14 || cookieSize < 0xf0 || cookieSize > 0x200) throw new InvalidOperationException("Unsupportd eReader format");
byte[] input = desEngine.TransformFinalBlock(data.Copy(-cookieSize), 0, cookieSize);
byte[] r = UnshuffData(input.SubRange(0, -8), cookieShuf);
//using (var stream = new FileStream(pdb.Filename+".eReaderSection1Dump", FileMode.Create, FileAccess.ReadWrite, FileShare.Read)) stream.Write(r, 0, r.Length);
byte[] userKeyPart1 = Encoding.ASCII.GetBytes(FixUserName(name));
byte[] userKeyPart2 = Encoding.ASCII.GetBytes(ccNumber.ToCharArray().Copy(-8));
long userKey;
using (var stream1 = new MemoryStream(userKeyPart1))
using (var stream2 = new MemoryStream(userKeyPart2))
{
userKey = new CRC32().GetCrc32(stream1) & 0xffffffff;
userKey = userKey << 32 | new CRC32().GetCrc32(stream2) & 0xffffffff;
}
var drmSubVersion = (ushort)(r[0] << 8 | r[1]);
numTextPages = (ushort)(r[2] << 8 | r[3]) - 1;
flags = r[4] << 24 | r[5] << 16 | r[6] << 8 | r[7];
firstImagePage = (ushort)(r[24] << 8 | r[25]);
numImagePages = (ushort)(r[26] << 8 | r[27]);
if ((flags & ReqdFlags) != ReqdFlags) throw new InvalidOperationException(string.Format("Unsupported flags combination: {0:x8}", flags));
byte[] userKeyArray = BitConverter.GetBytes(userKey);
if (BitConverter.IsLittleEndian) userKeyArray = userKeyArray.Reverse();
desEngine = GetDesEngine(userKeyArray);
byte[] encryptedKey = new byte[0],
encryptedKeySha = new byte[0];
if (eReaderPdb.CompressionMethod == EReaderCompression.Drm1)
{
if (drmSubVersion != 13) throw new InvalidOperationException(string.Format("Unknown eReader DRM subversion ID: {0}", drmSubVersion));
encryptedKey = r.Copy(44, 8);
encryptedKeySha = r.Copy(52, 20);
}
else if (eReaderPdb.CompressionMethod == EReaderCompression.Drm2)
{
encryptedKey = r.Copy(172, 8);
encryptedKeySha = r.Copy(56, 20);
}
contentKey = desEngine.TransformFinalBlock(encryptedKey, 0, encryptedKey.Length);
byte[] checkHash = SHA1.Create().ComputeHash(contentKey);
if (!encryptedKeySha.IsEqualTo(checkHash))
{
var s = new StringBuilder();
for (var x = 0; x < (r.Length - 8); x += 2)
{
for (var y = 0; y < (x - 20); y += 2) if (TestKeyDecryption(desEngine, r, x, y)) s.AppendFormat("keyOffset={0}, hashOffset={1}\n", x, y);
for (var y = x + 8; y < (r.Length - 20); y += 2) if (TestKeyDecryption(desEngine, r, x, y)) s.AppendFormat("keyOffset={0}, hashOffset={1}\n", x, y);
}
if (s.Length > 0) throw new InvalidDataException("Key and/or KeyHash offset mismatch. Possible values:\n\n" + s);
throw new ArgumentException("Incorrect Name of Credit Card number.");
}
contentDecryptor = GetDesEngine(contentKey);
}
public static void Strip(string ebookPath, string outputDir, string name, string ccNumber)
{
if (string.IsNullOrEmpty(outputDir)) outputDir = Path.GetDirectoryName(ebookPath);
var ebook = new Pdb(ebookPath);
var processor = new EReaderProcessor(ebook, name, ccNumber);
outputDir = Path.Combine(outputDir, ebook.Filename);
if (!Directory.Exists(outputDir)) Directory.CreateDirectory(outputDir);
string path;
for (int i = 0; i < processor.numImagePages; i++)
{
EReaderImageInfo img = processor.GetImage(i);
path = Path.Combine(outputDir, img.filename);
using (FileStream stream = File.Create(path)) stream.Write(img.content, 0, img.content.Length);
}
string pml = processor.GetText();
path = Path.Combine(outputDir, ebook.Filename + ".pml");
using (StreamWriter stream = File.CreateText(path)) stream.Write(pml);
}
public EReaderPdb(Pdb pdbReader)
{
this.pdbReader = pdbReader;
byte[] headerRawData = pdbReader.GetSection(0);
if (headerRawData.Length != 132)
throw new FormatException("Unknown eReader header format.");
using (var stream = new MemoryStream(headerRawData))
{
var b = (byte)stream.ReadByte();
if (b > 1) throw new FormatException(string.Format("Unknown DRM flag {0}", b));
haveDrm = b == 1;
b = (byte)stream.ReadByte();
compressionMethod = (EReaderCompression)b;
var buf = new byte[4];
stream.Read(buf, 0, 4); //unknown, should be 0x00000000
buf = new byte[2];
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
textEncoding = BitConverter.ToUInt16(buf, 0); //should be 2515 or 25152 for cp1251
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfSmallFontPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfLargeFontPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
nonTextFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfChapters = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfSmallFontIndexPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfLargeFontIndexPages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfImages = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfLinks = BitConverter.ToUInt16(buf, 0);
b = (byte)stream.ReadByte();
if (b > 1) throw new FormatException(string.Format("Incorrect Metadata flag {0}", b));
haveMetadata = b == 1;
buf = new byte[3];
stream.Read(buf, 0, 3); //unknown, should be 0
buf = new byte[2];
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfFootnotes = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
numberOfSidebars = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
chapterIndexFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
magickValue = BitConverter.ToUInt16(buf, 0);
//if (magickValue != 2560) throw new FormatException(string.Format("Unknown Magick Value {0}", magickValue));
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
smallFontPageIndexeFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
largeFontPageIndexeFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
imageDataFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
linksFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
metadataFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2); //unknown, should be 0x0000
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
footnotesFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
sidebarFirstRecord = BitConverter.ToUInt16(buf, 0);
stream.Read(buf, 0, 2);
if (BitConverter.IsLittleEndian) buf = buf.Reverse();
lastRecord = BitConverter.ToUInt16(buf, 0);
}
}
