/// <summary>
/// Create based on a stream.
/// </summary>
/// <param name="storageStream">Storage stream, usually FileStream</param>
/// <param name="password">Password. Pass null for plaintext.</param>
/// <throws>InvalidPasswordException if password is incorrect</throws>
/// <throws>FileNotFoundException if file does not exist</throws>
/// <throws>FileFormatException: file is in the wrong format</throws>
public OfficeCryptoStream(Stream storageStream, String password)
{
_storage = storageStream;
Password = password;
if (storageStream.Length == 0)
{
// No need to decrypt, stream is already 0-length
return;
}
// Check if the file is actually encrypted or plaintext
bool isPlain = IsPlaintext(storageStream);
bool isEncrypted = IsEncrypted(storageStream);
if (!isPlain && !isEncrypted)
{
Close(); // In ctor, cannot rely on client/using to close
throw new FileFormatException("File is neither plaintext package nor Office 2007 encrypted.");
}
// Read the file
byte[] contents = new byte[storageStream.Length];
storageStream.Read(contents, 0, contents.Length);
// Decrypt if needed
if (isEncrypted)
{
if (String.IsNullOrEmpty(Password))
{
Close(); // In ctor, cannot rely on client/using to close
throw new InvalidPasswordException("Password not provided.");
}
try
{
OfficeCrypto oc = new OfficeCrypto();
contents = oc.DecryptToArray(contents, password);
}
catch (Exception)
{
Close(); // In ctor, cannot rely on client/using to close
throw;
}
}
// Write out to the memory stream
base.Write(contents, 0, contents.Length);
base.Flush();
base.Position = 0;
}
/// <summary>
/// Create based on a stream.
/// </summary>
/// <param name="storageStream">Storage stream, usually FileStream</param>
/// <param name="password">Password. Pass null for plaintext.</param>
/// <throws>InvalidPasswordException if password is incorrect</throws>
/// <throws>FileNotFoundException if file does not exist</throws>
/// <throws>FileFormatException: file is in the wrong format</throws>
public OfficeCryptoStream(Stream storageStream, String password)
{
_storage = storageStream;
Password = password;
if (storageStream.Length == 0)
{
// No need to decrypt, stream is already 0-length
return;
}
// Check if the file is actually encrypted or plaintext
bool isPlain = IsPlaintext(storageStream);
bool isEncrypted = IsEncrypted(storageStream);
if (!isPlain && !isEncrypted)
{
Close(); // In ctor, cannot rely on client/using to close
throw new FileFormatException("File is neither plaintext package nor Office 2007 encrypted.");
}
// Read the file
byte[] contents = new byte[storageStream.Length];
storageStream.Read(contents, 0, contents.Length);
// Decrypt if needed
if (isEncrypted)
{
if (String.IsNullOrEmpty(Password))
{
Close(); // In ctor, cannot rely on client/using to close
throw new InvalidPasswordException("Password not provided.");
}
try
{
OfficeCrypto oc = new OfficeCrypto();
contents = oc.DecryptToArray(contents, password);
}
catch (Exception)
{
Close(); // In ctor, cannot rely on client/using to close
throw;
}
}
// Write out to the memory stream
base.Write(contents, 0, contents.Length);
base.Flush();
base.Position = 0;
}
/// <summary>
/// Static test function exposed by the class
/// </summary>
public static Package OfficePasswordHash(string filename, string password)
{
OfficeCrypto officeCrypto = new OfficeCrypto();
try
{
Package package = officeCrypto.DecryptToPackage(filename, password);
Console.WriteLine("Package decrypted and opened");
return(package);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(null);
}
/// <summary>
/// Encrypt and write out to storage stream.
/// NOTE: Don't forget to call Close()
/// </summary>
public void Save()
{
_storage.Seek(0, SeekOrigin.Begin);
_storage.SetLength(0);
_storage.Position = 0;
if (Encrypted)
{
// Encrypt this to the storage stream
OfficeCrypto oc = new OfficeCrypto();
oc.EncryptToStream(base.ToArray(), Password, _storage);
}
else
{
// Just write the contents to storage stream
base.WriteTo(_storage);
}
}
public static bool EncryptPackageFile(string filename, string password, out byte[] encryptionInfo, out byte[] encryptedPackage)
{
OfficeCrypto officeCrypto = new OfficeCrypto();
encryptionInfo = null;
encryptedPackage = null;
try
{
officeCrypto.EncryptPackage(filename, password, out encryptionInfo, out encryptedPackage);
Console.WriteLine("Package encrypted");
officeCrypto.TestEncrytion(password, encryptionInfo, encryptedPackage);
return(true);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(false);
}
/// <summary>
/// Static test function exposed by the class
/// </summary>
public static Package OfficePasswordHash(string filename, string password)
{
OfficeCrypto officeCrypto = new OfficeCrypto();
try
{
Package package = officeCrypto.DecryptToPackage(filename, password);
Console.WriteLine("Package decrypted and opened");
return package;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return null;
}
public static bool EncryptPackageFile(string filename, string password, out byte[] encryptionInfo, out byte[] encryptedPackage)
{
OfficeCrypto officeCrypto = new OfficeCrypto();
encryptionInfo = null;
encryptedPackage = null;
try
{
officeCrypto.EncryptPackage(filename, password, out encryptionInfo, out encryptedPackage);
Console.WriteLine("Package encrypted");
officeCrypto.TestEncrytion(password, encryptionInfo, encryptedPackage);
return true;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return false;
}
/// <summary>
/// Encrypt and write out to storage stream.
/// NOTE: Don't forget to call Close()
/// </summary>
public void Save()
{
_storage.Seek(0, SeekOrigin.Begin);
_storage.SetLength(0);
_storage.Position = 0;
if (Encrypted)
{
// Encrypt this to the storage stream
OfficeCrypto oc = new OfficeCrypto();
oc.EncryptToStream(base.ToArray(), Password, _storage);
}
else
{
// Just write the contents to storage stream
base.WriteTo(_storage);
}
}
