/// <summary>
/// Writes the specified value to the PDF stream.
/// </summary>
public void Write(PdfUInteger value)
{
WriteSeparator(CharCat.Character);
_lastCat = CharCat.Character;
WriteRaw(value.Value.ToString(CultureInfo.InvariantCulture));
}
/// <summary>
/// Prepares the security handler for encrypting the document.
/// </summary>
public void PrepareEncryption()
{
//#if !SILVERLIGHT
Debug.Assert(_document._securitySettings.DocumentSecurityLevel != PdfDocumentSecurityLevel.None);
var permissions = (uint)Permission;
bool strongEncryption;
if (_document._securitySettings.DocumentSecurityLevel == PdfDocumentSecurityLevel.Encrypted128BitAes)
{
strongEncryption = true;
Elements[Keys.V] = new PdfInteger(4);
Elements[Keys.R] = new PdfInteger(4);
CryptFilterDictionary aesCryptFilter = new CryptFilterDictionary();
aesCryptFilter.CFM = CFM.AESV2;
aesCryptFilter.Length = 16;
PdfDictionary cryptFilters = new PdfDictionary();
cryptFilters.Elements["/StdCF"] = aesCryptFilter;
Elements[Keys.CF] = cryptFilters;
Elements[Keys.StmF] = new PdfName("/StdCF");
Elements[Keys.StrF] = new PdfName("/StdCF");
}
else if (_document._securitySettings.DocumentSecurityLevel == PdfDocumentSecurityLevel.Encrypted128Bit)
{
strongEncryption = true;
Elements[Keys.V] = new PdfInteger(2);
Elements[Keys.Length] = new PdfInteger(128);
Elements[Keys.R] = new PdfInteger(3);
}
else
{
strongEncryption = false;
Elements[Keys.V] = new PdfInteger(1);
Elements[Keys.Length] = new PdfInteger(40);
Elements[Keys.R] = new PdfInteger(2);
}
if (String.IsNullOrEmpty(_userPassword))
{
_userPassword = "";
}
// Use user password twice if no owner password provided.
if (String.IsNullOrEmpty(_ownerPassword))
{
_ownerPassword = _userPassword;
}
// Correct permission bits
permissions |= strongEncryption ? 0xfffff0c0 : 0xffffffc0;
permissions &= 0xfffffffc;
var pValue = new PdfUInteger(permissions);
Debug.Assert(_ownerPassword.Length > 0, "Empty owner password.");
byte[] userPad = PadPassword(_userPassword);
byte[] ownerPad = PadPassword(_ownerPassword);
_md5.Initialize();
_ownerKey = ComputeOwnerKey(userPad, ownerPad, strongEncryption);
byte[] documentID = PdfEncoders.RawEncoding.GetBytes(_document.Internals.FirstDocumentID);
InitWithUserPassword(documentID, _userPassword, _ownerKey, permissions, strongEncryption);
PdfString oValue = new PdfString(PdfEncoders.RawEncoding.GetString(_ownerKey, 0, _ownerKey.Length));
PdfString uValue = new PdfString(PdfEncoders.RawEncoding.GetString(_userKey, 0, _userKey.Length));
Elements[Keys.Filter] = new PdfName("/Standard");
Elements[Keys.O] = oValue;
Elements[Keys.U] = uValue;
Elements[Keys.P] = pValue;
//#endif
}
/// <summary>
/// Writes the specified value to the PDF stream.
/// </summary>
public void Write(PdfUInteger value)
{
WriteSeparator(CharCat.Character);
this.lastCat = CharCat.Character;
WriteRaw(value.Value.ToString());
}
/// <summary>
/// Writes the specified value to the PDF stream.
/// </summary>
public void Write(PdfUInteger value)
{
WriteSeparator(CharCat.Character);
this.lastCat = CharCat.Character;
WriteRaw(value.Value.ToString());
}
/// <summary>
/// Writes the specified value to the PDF stream.
/// </summary>
public void Write(PdfUInteger value)
{
WriteSeparator(CharCat.Character);
_lastCat = CharCat.Character;
WriteRaw(value.Value.ToString(CultureInfo.InvariantCulture));
}
