PDFDecryptor Component

Properties   Methods   Events   Config Settings   Errors  

The PDFDecryptor component decrypts PDF documents.

Syntax

nsoftware.SecureBlackbox.Pdfdecryptor

Remarks

PDFDecryptor decrypts PDF documents encrypted with passwords or certificates.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the component with short descriptions. Click on the links for further details.

DecryptionCertificate Property (PDFDecryptor Component)

A decryption certificate.

Syntax

• C#
• VB.NET

public Certificate DecryptionCertificate { get; set; }

Public Property DecryptionCertificate As Certificate

Remarks

Use this property to provide the decryption certificate. The certificate should have a private key associated with it.

This property is not available at design time.

DocumentInfo Property (PDFDecryptor Component)

Contains information about the document properties.

Syntax

• C#
• VB.NET

public PDFDocumentInfo DocumentInfo { get; }

Public ReadOnly Property DocumentInfo As PDFDocumentInfo

Remarks

Use this property to access general parameters of the document being processed. A good place to check this property is in the handler of the DocumentLoaded event.

This property is read-only and not available at design time.

ExternalCrypto Property (PDFDecryptor Component)

Provides access to external signing and DC parameters.

Syntax

• C#
• VB.NET

public ExternalCrypto ExternalCrypto { get; }

Public ReadOnly Property ExternalCrypto As ExternalCrypto

Remarks

Use this property to tune-up remote cryptography settings. SecureBlackbox supports two independent types of external cryptography: synchronous (based on the ExternalSign event) and asynchronous (based on the DC protocol and the DCAuth signing component).

This property is read-only.

FIPSMode Property (PDFDecryptor Component)

Reserved.

Syntax

• C#
• VB.NET

public bool FIPSMode { get; set; }

Public Property FIPSMode As Boolean

Default Value

False

Remarks

This property is reserved for future use.

InputBytes Property (PDFDecryptor Component)

Use this property to pass the input to component in byte array form.

Syntax

• C#
• VB.NET

public byte[] InputBytes { get; set; }

Public Property InputBytes As Byte()

Remarks

Assign a byte array containing the data to be processed to this property.

This property is not available at design time.

InputFile Property (PDFDecryptor Component)

The PDF file to be decrypted.

Syntax

• C#
• VB.NET

public string InputFile { get; set; }

Public Property InputFile As String

Default Value

""

Remarks

Provide the path to the PDF document to be decrypted.

InputStream Property (PDFDecryptor Component)

A stream containing the PDF document.

Syntax

• C#
• VB.NET

public System.IO.Stream InputStream { get; set; }

Public Property InputStream As System.IO.Stream

Default Value

null

Remarks

Use this property to supply the PDF document for decryption in a stream.

This property is not available at design time.

OutputBytes Property (PDFDecryptor Component)

Use this property to read the output the component object has produced.

Syntax

• C#
• VB.NET

public byte[] OutputBytes { get; }

Public ReadOnly Property OutputBytes As Byte()

Remarks

Read the contents of this property after the operation has completed to read the produced output. This property will only be set if the OutputFile and OutputStream properties had not been assigned.

This property is read-only and not available at design time.

OutputFile Property (PDFDecryptor Component)

The file to save the decrypted document to.

Syntax

• C#
• VB.NET

public string OutputFile { get; set; }

Public Property OutputFile As String

Default Value

""

Remarks

Specifies the path where the decrypted PDF should be saved.

OutputStream Property (PDFDecryptor Component)

The stream to write the decrypted document to.

Syntax

• C#
• VB.NET

public System.IO.Stream OutputStream { get; set; }

Public Property OutputStream As System.IO.Stream

Default Value

null

Remarks

Use this property to pass a stream to save the decrypted document to.

This property is not available at design time.

Password Property (PDFDecryptor Component)

The decryption password.

Syntax

• C#
• VB.NET

public string Password { get; set; }

Public Property Password As String

Default Value

""

Remarks

Use this property to provide the decryption password.

Config Method (PDFDecryptor Component)

Sets or retrieves a configuration setting.

Syntax

• C#
• VB.NET

public string Config(string configurationString);

Public Function Config(ByVal ConfigurationString As String) As String

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Decrypt Method (PDFDecryptor Component)

Decrypts a PDF document.

Syntax

• C#
• VB.NET

public void Decrypt();

Public Sub Decrypt()

Remarks

Use this method to decrypt a PDF document provided via InputFile (InputStream). The decrypted document will be saved in OutputFile (OutputStream).

DoAction Method (PDFDecryptor Component)

Performs an additional action.

Syntax

• C#
• VB.NET

public string DoAction(string actionID, string actionParams);

Public Function DoAction(ByVal ActionID As String, ByVal ActionParams As String) As String

Remarks

DoAction is a generic method available in every component. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.

The unique identifier (case insensitive) of the action is provided in the ActionID parameter.

ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....

DocumentLoaded Event (PDFDecryptor Component)

This event is fired when the document has been loaded into memory.

Syntax

• C#
• VB.NET

public event OnDocumentLoadedHandler OnDocumentLoaded;

public delegate void OnDocumentLoadedHandler(object sender, PdfdecryptorDocumentLoadedEventArgs e);

public class PdfdecryptorDocumentLoadedEventArgs : EventArgs {
  public bool Cancel { get; set; }
}

Public Event OnDocumentLoaded As OnDocumentLoadedHandler

Public Delegate Sub OnDocumentLoadedHandler(sender As Object, e As PdfdecryptorDocumentLoadedEventArgs)

Public Class PdfdecryptorDocumentLoadedEventArgs Inherits EventArgs
  Public Property Cancel As Boolean
End Class

Remarks

The handler for this event is a good place to check the document structure, which may be useful when preparing the signature. For example, you can use the Pages information to find the optimal position for the signature widget.

Set Cancel to true to terminate document processing on this stage.

Encrypted Event (PDFDecryptor Component)

Notifies the application that the document is encrypted and provides recipient certificate details if asymmetric encryption was used to encrypt the document.

Syntax

• C#
• VB.NET

public event OnEncryptedHandler OnEncrypted;

public delegate void OnEncryptedHandler(object sender, PdfdecryptorEncryptedEventArgs e);

public class PdfdecryptorEncryptedEventArgs : EventArgs {
  public bool CertUsed { get; }
  public string IssuerRDN { get; }
  public byte[] SerialNumber { get; }
  public byte[] SubjectKeyID { get; }
  public bool NeedCredential { get; }
  public bool SkipThis { get; set; }
}

Public Event OnEncrypted As OnEncryptedHandler

Public Delegate Sub OnEncryptedHandler(sender As Object, e As PdfdecryptorEncryptedEventArgs)

Public Class PdfdecryptorEncryptedEventArgs Inherits EventArgs
  Public ReadOnly Property CertUsed As Boolean
  Public ReadOnly Property IssuerRDN As String
  Public ReadOnly Property SerialNumber As Byte()
  Public ReadOnly Property SubjectKeyID As Byte()
  Public ReadOnly Property NeedCredential As Boolean
  Public Property SkipThis As Boolean
End Class

Remarks

The component fires this event when processing encrypted documents to report the fact of encryption and pass certificate parameters to the user.

This event fires repeatedly for each encryption mechanism used in the document until the user provides the correct credential via the DecryptionCertificate or Password property (depending on the encryption method used), or sets SkipThis to true.

The CertUsed parameter specifies the encryption method used. If set to true, it indicates that the document uses asymmetric (certificate-based) encryption. In that case, the IssuerRDN, SerialNumber, and SubjectKeyID parameters provide the details of the encryption certificate. Note that the document can be encrypted with more than one certificate (or have "more than one recipient"), in which case each certificate will invoke its own Encrypted event loop.

CertUsed set to false indicates that the document uses password encryption. In this case, provide the password via the Password property.

The NeedCredential parameter specifies whether the correct credential is already available to the component or still needs to be set. One example where NeedCredential would be set to false is where it had been provided by the application prior to processing the document (e.g. by setting the Password property to a known pre-defined value). If NeedCredential is set to true, you must provide the valid credential for the decryption process to succeed.

Error Event (PDFDecryptor Component)

Information about errors during signing/validation.

Syntax

• C#
• VB.NET

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, PdfdecryptorErrorEventArgs e);

public class PdfdecryptorErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}

Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As PdfdecryptorErrorEventArgs)

Public Class PdfdecryptorErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The event is fired in case of exceptional conditions during PDF processing.

ErrorCode contains an error code and Description contains a textual description of the error.

ExternalDecrypt Event (PDFDecryptor Component)

Handles remote or external decryption.

Syntax

• C#
• VB.NET

public event OnExternalDecryptHandler OnExternalDecrypt;

public delegate void OnExternalDecryptHandler(object sender, PdfdecryptorExternalDecryptEventArgs e);

public class PdfdecryptorExternalDecryptEventArgs : EventArgs {
  public string OperationId { get; }
  public string Algorithm { get; }
  public string Pars { get; }
  public string EncryptedData { get; }
  public string Data { get; set; }
}

Public Event OnExternalDecrypt As OnExternalDecryptHandler

Public Delegate Sub OnExternalDecryptHandler(sender As Object, e As PdfdecryptorExternalDecryptEventArgs)

Public Class PdfdecryptorExternalDecryptEventArgs Inherits EventArgs
  Public ReadOnly Property OperationId As String
  Public ReadOnly Property Algorithm As String
  Public ReadOnly Property Pars As String
  Public ReadOnly Property EncryptedData As String
  Public Property Data As String
End Class

Remarks

Assign a handler to this event if you need to delegate a low-level decryption operation to an external, remote, or custom decryption engine. The handler receives an encrypted value in the EncryptedData parameter, and is expected to decrypt it and place the decrypted value into the Data parameter.

OperationId provides a comment about the operation and its origin. It depends on the exact component being used, and may be empty. Algorithm specifies the encryption algorithm being used, and Pars contains algorithm-dependent parameters.

The component uses base16 (hex) encoding for the EncryptedData, Data, and Pars parameters. If your decryption engine uses a different input and output encoding, you may need to decode and/or encode the data before and/or after the decryption.

Sample data encoded in base16: a0dee2a0382afbb09120ffa7ccd8a152 - lower case base16 A0DEE2A0382AFBB09120FFA7CCD8A152 - upper case base16

Notification Event (PDFDecryptor Component)

This event notifies the application about an underlying control flow event.

Syntax

• C#
• VB.NET

public event OnNotificationHandler OnNotification;

public delegate void OnNotificationHandler(object sender, PdfdecryptorNotificationEventArgs e);

public class PdfdecryptorNotificationEventArgs : EventArgs {
  public string EventID { get; }
  public string EventParam { get; }
}

Public Event OnNotification As OnNotificationHandler

Public Delegate Sub OnNotificationHandler(sender As Object, e As PdfdecryptorNotificationEventArgs)

Public Class PdfdecryptorNotificationEventArgs Inherits EventArgs
  Public ReadOnly Property EventID As String
  Public ReadOnly Property EventParam As String
End Class

Remarks

The component fires this event to let the application know about some event, occurrence, or milestone in the component. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.

The unique identifier of the event is provided in the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the component, the exact action it is performing, or the document being processed, one or both may be omitted.

Certificate Type

Provides details of an individual X.509 certificate.

Remarks

This type provides access to X.509 certificate details.

Fields

Constructors

• C#
• VB.NET

public Certificate(byte[] bytes, int startIndex, int count, string password);

Public Certificate(ByVal Bytes As Byte(), ByVal StartIndex As Integer, ByVal Count As Integer, ByVal Password As String)

Loads the X.509 certificate from a memory buffer. Bytes is a buffer containing the raw certificate data. StartIndex and Count specify the starting position and number of bytes to be read from the buffer, respectively. Password is a password encrypting the certificate.

• C#
• VB.NET

public Certificate(byte[] certBytes, int certStartIndex, int certCount, byte[] keyBytes, int keyStartIndex, int keyCount, string password);

Public Certificate(ByVal CertBytes As Byte(), ByVal CertStartIndex As Integer, ByVal CertCount As Integer, ByVal KeyBytes As Byte(), ByVal KeyStartIndex As Integer, ByVal KeyCount As Integer, ByVal Password As String)

Loads the X.509 certificate from a memory buffer. CertBytes is a buffer containing the raw certificate data. CertStartIndex and CertCount specify the number of bytes to be read from the buffer, respectively. KeyBytes is a buffer containing the private key data. KeyStartIndex and KeyCount specify the starting position and number of bytes to be read from the buffer, respectively. Password is a password encrypting the certificate.

• C#
• VB.NET

public Certificate(byte[] bytes, int startIndex, int count);

Public Certificate(ByVal Bytes As Byte(), ByVal StartIndex As Integer, ByVal Count As Integer)

Loads the X.509 certificate from a memory buffer. Bytes is a buffer containing the raw certificate data. StartIndex and Count specify the starting position and number of bytes to be read from the buffer, respectively.

• C#
• VB.NET

public Certificate(string path, string password);

Public Certificate(ByVal Path As String, ByVal Password As String)

Loads the X.509 certificate from a file. Path specifies the full path to the file containing the certificate data. Password is a password encrypting the certificate.

• C#
• VB.NET

public Certificate(string certPath, string keyPath, string password);

Public Certificate(ByVal CertPath As String, ByVal KeyPath As String, ByVal Password As String)

Loads the X.509 certificate from a file. CertPath specifies the full path to the file containing the certificate data. KeyPath specifies the full path to the file containing the private key. Password is a password encrypting the certificate.

• C#
• VB.NET

public Certificate(string path);

Public Certificate(ByVal Path As String)

Loads the X.509 certificate from a file. Path specifies the full path to the file containing the certificate data.

• C#
• VB.NET

public Certificate(System.IO.Stream stream);

Public Certificate(ByVal Stream As System.IO.Stream)

Loads the X.509 certificate from a stream. Stream is a stream containing the certificate data.

• C#
• VB.NET

public Certificate(System.IO.Stream stream, string password);

Public Certificate(ByVal Stream As System.IO.Stream, ByVal Password As String)

Loads the X.509 certificate from a stream. Stream is a stream containing the certificate data. Password is a password encrypting the certificate.

• C#
• VB.NET

public Certificate(System.IO.Stream certStream, System.IO.Stream keyStream, string password);

Public Certificate(ByVal CertStream As System.IO.Stream, ByVal KeyStream As System.IO.Stream, ByVal Password As String)

Loads the X.509 certificate from a stream. CertStream is a stream containing the certificate data. KeyStream is a stream containing the private key. Password is a password encrypting the certificate.

• C#
• VB.NET

public Certificate();

Public Certificate()

Creates a new object with default field values.

ExternalCrypto Type

Specifies the parameters of external cryptographic calls.

Remarks

External cryptocalls are used in a Distributed Cryptography (DC) subsystem, which allows the delegation of security operations to the remote agent. For instance, it can be used to compute the signature value on the server, while retaining the client's private key locally.

Fields

Constructors

• C#
• VB.NET

public ExternalCrypto();

Public ExternalCrypto()

Creates a new ExternalCrypto object with default field values.

PDFDocumentInfo Type

Contains document security information.

Remarks

This type provides an overview of the document security parameters, including the encryption method (if used) and signature count. This information is available early into the signing/validation process and lets you prepare for the subsequent signature validation.

Fields

Constructors

• C#
• VB.NET

public PDFDocumentInfo();

Public PDFDocumentInfo()

Initializes an instance of PDFDocumentInfo class.

Config Settings (PDFDecryptor Component)

PDFDecryptor Config Settings

Base Config Settings

Trappable Errors (PDFDecryptor Component)

PDFDecryptor Errors