public void Unlock(PdfOptions args)
{
OpenAsPdf(args.Source, args.PasswordArray);
var tempTarget = Path.GetTempFileName();
var reader = new PdfReader(args.Source, new ReaderProperties().SetPassword(args.PasswordArray));
var writer = new PdfWriter(tempTarget);
try
{
if (args.ForceDecryption)
{
reader.SetUnethicalReading(true);
}
var doc = new PdfDocument(reader, writer);
doc.SetCloseReader(true);
doc.SetCloseWriter(true);
doc.Close();
File.Copy(tempTarget, args.Target, true);
}
finally
{
reader.Close();
writer.Close();
File.Delete(tempTarget);
}
}
public static bool TryParse(dynamic request, out PdfOptions result)
{
result = null;
var values = request as IDictionary <string, object>;
if (values == null)
{
result = null;
return(false);
}
try
{
result = new PdfOptions
{
Source = values.ContainsKey("source") ? (string)values["source"] : null,
Target = values.ContainsKey("target") ? (string)values["target"] : null,
Password = values.ContainsKey("password") ? (string)values["password"] : null,
UserPassword = values.ContainsKey("userPassword") ? (string)values["userPassword"] : null,
OwnerPassword = values.ContainsKey("ownerPassword") ? (string)values["ownerPassword"] : null,
Permissions = values.ContainsKey("permissions") ? (int)values["permissions"] : (int?)null,
EncryptionLevel = values.ContainsKey("encryptionLevel") ? (int)values["encryptionLevel"] : (int?)null,
ForceDecryption = values.ContainsKey("forceDecryption") ? (bool)values["forceDecryption"] : false
};
return(true);
}
catch (InvalidCastException)
{
return(false);
}
}
public void Protect(PdfOptions args)
{
var tempTarget = Path.GetTempFileName();
var reader = new PdfReader(args.Source, new ReaderProperties().SetPassword(args.PasswordArray));
var permissions = args.Permissions ?? unchecked ((int)reader.GetPermissions());
var encryption = args.EncryptionLevel ?? reader.GetCryptoMode();
// reader.GetCryptoMode() returns -1 when no encryption is set and this is not a valid encryption.
// use AES 128 encryption by default.
encryption = encryption != -1 ? encryption : EncryptionConstants.ENCRYPTION_AES_128;
var writer = new PdfWriter(tempTarget, new WriterProperties().SetStandardEncryption(
args.UserPasswordArray,
args.OwnerPasswordArray ?? args.UserPasswordArray,
permissions,
encryption)
);
try
{
var doc = new PdfDocument(reader, writer);
doc.SetCloseReader(true);
doc.SetCloseWriter(true);
doc.Close();
File.Copy(tempTarget, args.Target, true);
}
finally
{
reader.Close();
writer.Close();
File.Delete(tempTarget);
}
}