protected internal virtual void SetStandardHandlerDicEntries(PdfDictionary encryptionDictionary, byte[] userKey
, byte[] ownerKey)
{
encryptionDictionary.Put(PdfName.Filter, PdfName.Standard);
encryptionDictionary.Put(PdfName.O, new PdfLiteral(StreamUtil.CreateEscapedString(ownerKey)));
encryptionDictionary.Put(PdfName.U, new PdfLiteral(StreamUtil.CreateEscapedString(userKey)));
encryptionDictionary.Put(PdfName.P, new PdfNumber(permissions));
}
private void SetAES256DicEntries(PdfDictionary encryptionDictionary, byte[] oeKey, byte[] ueKey, byte[] aes256Perms
, bool encryptMetadata, bool embeddedFilesOnly)
{
int vAes256 = 5;
int rAes256 = 5;
int rAes256Pdf2 = 6;
encryptionDictionary.Put(PdfName.OE, new PdfLiteral(StreamUtil.CreateEscapedString(oeKey)));
encryptionDictionary.Put(PdfName.UE, new PdfLiteral(StreamUtil.CreateEscapedString(ueKey)));
encryptionDictionary.Put(PdfName.Perms, new PdfLiteral(StreamUtil.CreateEscapedString(aes256Perms)));
encryptionDictionary.Put(PdfName.R, new PdfNumber(isPdf2 ? rAes256Pdf2 : rAes256));
encryptionDictionary.Put(PdfName.V, new PdfNumber(vAes256));
PdfDictionary stdcf = new PdfDictionary();
stdcf.Put(PdfName.Length, new PdfNumber(32));
if (!encryptMetadata)
{
encryptionDictionary.Put(PdfName.EncryptMetadata, PdfBoolean.FALSE);
}
if (embeddedFilesOnly)
{
stdcf.Put(PdfName.AuthEvent, PdfName.EFOpen);
encryptionDictionary.Put(PdfName.EFF, PdfName.StdCF);
encryptionDictionary.Put(PdfName.StrF, PdfName.Identity);
encryptionDictionary.Put(PdfName.StmF, PdfName.Identity);
}
else
{
stdcf.Put(PdfName.AuthEvent, PdfName.DocOpen);
encryptionDictionary.Put(PdfName.StrF, PdfName.StdCF);
encryptionDictionary.Put(PdfName.StmF, PdfName.StdCF);
}
stdcf.Put(PdfName.CFM, PdfName.AESV3);
PdfDictionary cf = new PdfDictionary();
cf.Put(PdfName.StdCF, stdcf);
encryptionDictionary.Put(PdfName.CF, cf);
}
private PdfArray GetEncodedRecipients()
{
PdfArray EncodedRecipients = new PdfArray();
byte[] cms;
for (int i = 0; i < recipients.Count; i++)
{
try {
cms = GetEncodedRecipient(i);
EncodedRecipients.Add(new PdfLiteral(StreamUtil.CreateEscapedString(cms)));
}
catch (GeneralSecurityException) {
EncodedRecipients = null;
// break was added while porting to itext7
break;
}
catch (System.IO.IOException) {
EncodedRecipients = null;
// break was added while porting to itext7
break;
}
}
return(EncodedRecipients);
}
