Search for encrypted object in QR code signatures Leave feedback
GroupDocs.Signature provides ability to search for embedded data objects in QR-code signatures (QrCodeSignature) with standard or custom encryption. Standard encryption is implemented over class SymmetricEncryption class. Creation of this object expects 3 arguments like encryption algorithm enumeration SymmetricAlgorithmType with one of following values (DES, TripleDES, RC2, Rijndael), string value key and string value salt.
Here are the steps to search for embedded objects in QR-code with standard encryption with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path or stream as a constructor parameter.
- Compose object of SymmetricEncryption class with same parameters as secured QR-code was signed with.
- Create objects of QrCodeSearchOptions class and setup property DataEncryption with object of SymmetricEncryption.
- Call Search method of Signature class instance and pass QrCodeSearchOptions to it.
public class DocumentSignatureData
{
[Format("SignID")]
public string ID { get; set; }
[Format("SAuth")]
public string Author { get; set; }
[Format("SDate", "yyyy-MM-dd")]
public DateTime Signed { get; set; }
[Format("SDFact", "N2")]
public decimal DataFactor { get; set; }
[SkipSerialization]
public string Comments { get; set; }
}
This example shows how to search for embedded object in QR-code signatures.
using (Signature signature = new Signature("QRCodeEncryptedObject.pdf"))
{
// setup key and pasphrase
string key = "1234567890";
string salt = "1234567890";
// create data encryption
IDataEncryption encryption = new SymmetricEncryption(SymmetricAlgorithmType.Rijndael, key, salt);
QrCodeSearchOptions options = new QrCodeSearchOptions()
{
// specify special pages to search on
AllPages = true,
PageNumber = 1,
PagesSetup = new PagesSetup() { FirstPage = true, LastPage = true, OddPages = false, EvenPages = false },
// specify special QRCode type to search
EncodeType = QrCodeTypes.QR,
//
DataEncryption = encryption
};
// search for signatures in document
List<QrCodeSignature> signatures = signature.Search<QrCodeSignature>(options);
Console.WriteLine("\nSource document contains following signatures.");
foreach (var qrCodeSignature in signatures)
{
Console.WriteLine("QRCode signature found at page {0} with type {1}.", qrCodeSignature.PageNumber,qrCodeSignature.EncodeType);
DocumentSignatureData documentSignatureData = qrCodeSignature.GetData<DocumentSignatureData>();
if(documentSignatureData != null)
{
Console.WriteLine("QRCode signature has DocumentSignatureData object:\n ID = {0}, Author = {1}, Signed = {2}, DataFactor {3}",
documentSignatureData.ID, documentSignatureData.Author, documentSignatureData.Signed.ToShortDateString(), documentSignatureData.DataFactor);
}
}
}
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Signature for .NET examples, plugins, and showcase
- GroupDocs.Signature for Java examples, plugins, and showcase
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
Along with the full-featured .NET library, we provide simple but powerful free online apps.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
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