Class TimeStampInformation

Namespace

Syncfusion.Pdf.Security

Assembly

Syncfusion.Pdf.Portable.dll

Specifies the timestamp information from the signature

public class TimeStampInformation

Inheritance

object

TimeStampInformation

Inherited Members

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Examples

// Loads an existing document
PdfLoadedDocument document = new PdfLoadedDocument(fileName);
// Gets the signature field
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
// Validate signature and get validation result
PdfSignatureValidationResult result = signatureField.ValidateSignature();
// Gets the timestamp information from the signature
TimeStampInformation timeStampInformation = result.TimeStampInformation;
// Close the document
document.Close(true);

' Loads an existing document
Dim document As PdfLoadedDocument = New PdfLoadedDocument(fileName)
' Gets the signature field
Dim signatureField As PdfLoadedSignatureField = document.Form.Fields[0] As PdfLoadedSignatureField
' Validate signature and get validation result
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature()
' Gets the timestamp information from the signature
Dim timeStampInformation As TimeStampInformation = result.TimeStampInformation
' Close the document
document.Close(true)

Constructors

TimeStampInformation()

public TimeStampInformation()

Properties

Certificate

Gets the timestamp certificate.

public X509Certificate2 Certificate { get; }

Property Value

X509Certificate2

Examples

// Loads an existing document
PdfLoadedDocument document = new PdfLoadedDocument(fileName);
// Gets the signature field
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
// Validate signature and get validation result
PdfSignatureValidationResult result = signatureField.ValidateSignature();
// Gets the timestamp information from the signature
TimeStampInformation timeStampInformation = result.TimeStampInformation;
// Checks whether the signature signed with timestamp alone
bool documentTimeStamp = timeStampInformation.IsDocumentTimeStamp;
//Gets the timestamp certificate.
X509Certificate2 certificate2 = result.TimeStampInformation.Certificate;
// Close the document
document.Close(true);

' Loads an existing document
Dim document As PdfLoadedDocument = New PdfLoadedDocument(fileName)
' Gets the signature field
Dim signatureField As PdfLoadedSignatureField = document.Form.Fields[0] As PdfLoadedSignatureField
' Validate signature and get validation result
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature()
' Gets the timestamp information from the signature
Dim timeStampInformation As TimeStampInformation = result.TimeStampInformation
' Checks whether the signature signed with timestamp alone
Dim documentTimeStamp As Boolean = timeStampInformation.IsDocumentTimeStamp
'Gets the timestamp certificate.
Dim certificate2 AS X509Certificate2 = result.TimeStampInformation.Certificate
' Close the document
document.Close(true)

IsDocumentTimeStamp

Checks whether the signature signed with timestamp alone

public bool IsDocumentTimeStamp { get; }

Property Value

bool

Examples

// Loads an existing document
PdfLoadedDocument document = new PdfLoadedDocument(fileName);
// Gets the signature field
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
// Validate signature and get validation result
PdfSignatureValidationResult result = signatureField.ValidateSignature();
// Gets the timestamp information from the signature
TimeStampInformation timeStampInformation = result.TimeStampInformation;
// Checks whether the signature signed with timestamp alone
bool documentTimeStamp = timeStampInformation.IsDocumentTimeStamp;
// Close the document
document.Close(true);

' Loads an existing document
Dim document As PdfLoadedDocument = New PdfLoadedDocument(fileName)
' Gets the signature field
Dim signatureField As PdfLoadedSignatureField = document.Form.Fields[0] As PdfLoadedSignatureField
' Validate signature and get validation result
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature()
' Gets the timestamp information from the signature
Dim timeStampInformation As TimeStampInformation = result.TimeStampInformation
' Checks whether the signature signed with timestamp alone
Dim documentTimeStamp As Boolean = timeStampInformation.IsDocumentTimeStamp
' Close the document
document.Close(true)

IsValid

Checks whether the timestamp is valid or not

public bool IsValid { get; }

Property Value

bool

Examples

// Loads an existing document
PdfLoadedDocument document = new PdfLoadedDocument(fileName);
// Gets the signature field
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
// Validate signature and get validation result
PdfSignatureValidationResult result = signatureField.ValidateSignature();
// Gets the timestamp information from the signature
TimeStampInformation timeStampInformation = result.TimeStampInformation;
// Checks whether the timestamp is valid or not
bool isValid = timeStampInformation.IsValid;
// Close the document
document.Close(true);

' Loads an existing document
Dim document As PdfLoadedDocument = New PdfLoadedDocument(fileName)
' Gets the signature field
Dim signatureField As PdfLoadedSignatureField = document.Form.Fields[0] As PdfLoadedSignatureField
' Validate signature and get validation result
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature()
' Gets the timestamp information from the signature
Dim timeStampInformation As TimeStampInformation = result.TimeStampInformation
' Checks whether the timestamp is valid or not
Dim isValid As Boolean = timeStampInformation.IsValid
' Close the document
document.Close(true)

SignerCertificates

Gets an array of PdfSignerCertificate objects that represent the certificates belonging to the signers associated with the signature timestamp.

public PdfSignerCertificate[] SignerCertificates { get; }

Property Value

PdfSignerCertificate[]

Examples

//Loads an existing document.
PdfLoadedDocument document = new PdfLoadedDocument("Input.pdf");
//Gets the signature field.
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
//Validates signature and gets the validation result.
PdfSignatureValidationResult result = signatureField.ValidateSignature();
//Gets signer certificates
PdfSignerCertificate[] certifcate = result.TimeStampInformation.SignerCertificates;
foreach (PdfSignerCertificate cert in certifcate)
{
    //Get the actual signer certificate.
    X509Certificate2 actualCertificate = cert.Certificate;                
    //Get the OCSP certificate.
    PdfRevocationCertificate ocspCertificate = cert.OcspCertificate;
    if (ocspCertificate != null)
    {
        //Gets a value indicating whether the revocation certificate is embedded within the PDF document
        bool isOcspEmbedded = ocspCertificate.IsEmbedded;
        //Gets the certificate associated with the revocation certificate
        X509Certificate2 ocsPCert = ocspCertificate.Certificates[0];
        //Gets the date and time when the revocation certificate becomes valid
        DateTime currentUpdate = ocspCertificate.ValidFrom;
        //Gets the date and time when the revocation certificate expires
        DateTime nextUpdate = ocspCertificate.ValidTo;                    
    }
    //Get the CRL certificate.
    PdfRevocationCertificate crlCertificate = cert.CrlCertificate;
    if (crlCertificate != null)
    {
        //Gets a value indicating whether the revocation certificate is embedded within the PDF document
        bool isCrlEmbedded = crlCertificate.IsEmbedded;
        //Gets the certificate associated with the revocation certificate
        X509Certificate2 crlCert = crlCertificate.Certificates[0];
        //Gets the date and time when the revocation certificate becomes valid
        DateTime currentUpdate = crlCertificate.ValidFrom;
        //Gets the date and time when the revocation certificate expires
        DateTime nextUpdate = crlCertificate.ValidTo;
    }
}
//Close the document.
document.Close(true);

Dim document As PdfLoadedDocument = New PdfLoadedDocument("Input.pdf")
Dim signatureField As PdfLoadedSignatureField = CType(document.Form.Fields(0),PdfLoadedSignatureField)
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature
Dim certifcate() As PdfSignerCertificate = result.TimeStampInformation.SignerCertificates
For Each cert As PdfSignerCertificate In certifcate
    'Get the actual signer certificate.
    Dim actualCertificate As X509Certificate2 = cert.Certificate
    'Get the OCSP certificate.
    Dim ocspCertificate As PdfRevocationCertificate = cert.OcspCertificate
    If (Not (ocspCertificate) Is Nothing) Then
        'Gets a value indicating whether the revocation certificate is embedded within the PDF document
        Dim isOcspEmbedded As Boolean = ocspCertificate.IsEmbedded
        'Gets the certificate associated with the revocation certificate
        Dim ocsPCert As X509Certificate2 = ocspCertificate.Certificates(0)
        'Gets the date and time when the revocation certificate becomes valid
        Dim currentUpdate As DateTime = ocspCertificate.ValidFrom
        'Gets the date and time when the revocation certificate expires
        Dim nextUpdate As DateTime = ocspCertificate.ValidTo
    End If
    'Get the CRL certificate.
    Dim crlCertificate As PdfRevocationCertificate = cert.CrlCertificate
    If (Not (crlCertificate) Is Nothing) Then
        'Gets a value indicating whether the revocation certificate is embedded within the PDF document
        Dim isCrlEmbedded As Boolean = crlCertificate.IsEmbedded
        'Gets the certificate associated with the revocation certificate
        Dim crlCert As X509Certificate2 = crlCertificate.Certificates(0)
        'Gets the date and time when the revocation certificate becomes valid
        Dim currentUpdate As DateTime = crlCertificate.ValidFrom
        'Gets the date and time when the revocation certificate expires
        Dim nextUpdate As DateTime = crlCertificate.ValidTo
    End If    
Next
'Close the document.
document.Close(true)

Time

Gets the timestamp time

public DateTime Time { get; }

Property Value

DateTime

Examples

// Loads an existing document
PdfLoadedDocument document = new PdfLoadedDocument(fileName);
// Gets the signature field
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
// Validate signature and get validation result
PdfSignatureValidationResult result = signatureField.ValidateSignature();
// Gets the timestamp information from the signature
TimeStampInformation timeStampInformation = result.TimeStampInformation;
// Gets the timestamp time
DateTime timeStampTime = timeStampInformation.Time;
// Close the document
document.Close(true);

' Loads an existing document
Dim document As PdfLoadedDocument = New PdfLoadedDocument(fileName)
' Gets the signature field
Dim signatureField As PdfLoadedSignatureField = document.Form.Fields[0] As PdfLoadedSignatureField
' Validate signature and get validation result
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature()
' Gets the timestamp information from the signature
Dim timeStampInformation As TimeStampInformation = result.TimeStampInformation
' Gets the timestamp time
Dim timeStampTime As DateTime = timeStampInformation.Time
' Close the document
document.Close(true)

TimeStampPolicyId

Gets the timestamp policy ID

public string TimeStampPolicyId { get; }

Property Value

string

Examples

// Loads an existing document
PdfLoadedDocument document = new PdfLoadedDocument(fileName);
// Gets the signature field
PdfLoadedSignatureField signatureField = document.Form.Fields[0] as PdfLoadedSignatureField;
// Validate signature and get validation result
PdfSignatureValidationResult result = signatureField.ValidateSignature();
// Gets the timestamp information from the signature
TimeStampInformation timeStampInformation = result.TimeStampInformation;
// Gets the timestamp policy ID
string timeStampPolicyId = timeStampInformation.TimeStampPolicyId;
// Close the document
document.Close(true);

' Loads an existing document
Dim document As PdfLoadedDocument = New PdfLoadedDocument(fileName)
' Gets the signature field
Dim signatureField As PdfLoadedSignatureField = document.Form.Fields[0] As PdfLoadedSignatureField
' Validate signature and get validation result
Dim result As PdfSignatureValidationResult = signatureField.ValidateSignature()
' Gets the timestamp information from the signature
Dim timeStampInformation As TimeStampInformation = result.TimeStampInformation
' Gets the timestamp policy ID
Dim timeStampPolicyId As string = timeStampInformation.TimeStampPolicyId
' Close the document
document.Close(true)