ASiCVerifier Component

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The ASiCVerifier component verifies associated signature containers.

Syntax

nsoftware.SecureBlackbox.ASiCVerifier

Remarks

ASiCVerifier provides the functionality of verifying signatures that are part of Associated Signature Containers. ASiC containers are ZIP-compatible files that bind together signed documents, and electronic signatures or timestamps made over them.

ASiC containers are widely used across Europe and many other countries, due to their high interoperability and seamless integration into existing CAdES and XAdES environments.

ASiCVerifier provides a simple and powerful mechanism to verify ASiC signatures in accordance with the respective ETSI standards (ETSI EN 319 162). It supports the following features of the standard (which cover the most of it):

• ASiC-S (simple) and ASiC-E (extended) signature profiles.
• CAdES- and XAdES-based signatures, as well as standalone RFC 3161 timestamps.
• Matching the signature to all the current and older ETSI signature profiles (including B-B, B-T, B-LT, B-LTA).
• Complete chain of trust validation process, using local, global, nation-specific (EUTL), or custom trust.
• Removal of existing signatures.
• Online and offline modes.

The component is being actively maintained and updated, following ongoing developments in AdES world. For more than 10 years, our engineers have been active participants of ETSI Plugtests events, to make sure that our e-Signature infrastructure is compliant and highly interoperable.

Just like our other signature components, ASiCVerifier supports several work modes that differ in complexity, allowing for both 'quick' and 'flexible' use. The simple mode assumes providing the InputFile and the OutputFile, and calling the one-pass Verify method. This approach is straightforward and would let you get ASiC verification on board quickly.

More complex tune-up may involve fine-grained adjustment of validation properties, such as providing your own validation material (certificates, OCSPs, CRLs) or fine-tuning conflict/error resolution options. You can also choose to work with the container step-by-step, by splitting the one-pass operation into a sequence of individual Open, Validate/Revalidate, and Close calls. ASiCVerifier verifier = new ASiCVerifier(); verifier.setInputFile("./SignedFile.scs"); // the path of the signed file verifier.setExtractionMode(ASiCVerifier.aemAll); // set the extraction method verifier.setOutputPath("./MyFiles"); // the path where the extracted files will be saved verifier.verify();

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.

AllSignaturesValid Property (ASiCVerifier Component)

The cumulative validity of all signatures.

Syntax

• C#
• VB.NET

public bool AllSignaturesValid { get; }

Public ReadOnly Property AllSignaturesValid As Boolean

Default Value

False

Remarks

Use this property to check if all the signatures found in the message or document are valid.

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

AutoValidateSignatures Property (ASiCVerifier Component)

Specifies whether ASiCVerifier should validate any present signatures when the document is opened.

Syntax

• C#
• VB.NET

public bool AutoValidateSignatures { get; set; }

Public Property AutoValidateSignatures As Boolean

Default Value

True

Remarks

This setting is switched on by default. You can choose to set this property to false in order to validate the signatures manually on a later stage using the Revalidate method.

BlockedCertificates Property (ASiCVerifier Component)

The certificates that must be rejected as trust anchors.

Syntax

• C#
• VB.NET

public CertificateList BlockedCertificates { get; }

Public Property BlockedCertificates As CertificateList

Remarks

Use this property to provide a list of compromised or blocked certificates. Any chain containing a blocked certificate will fail validation.

This property is not available at design time.

Certificates Property (ASiCVerifier Component)

A collection of certificates included in the electronic signature.

Syntax

• C#
• VB.NET

public CertificateList Certificates { get; }

Public ReadOnly Property Certificates As CertificateList

Remarks

This property includes a collection of certificates of the currently selected info.

This collection is indexed from 0 to count -1.

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

CheckTrustedLists Property (ASiCVerifier Component)

Specifies whether the component should attempt to validate chain trust via a known Trusted List.

Syntax

• C#
• VB.NET

public bool CheckTrustedLists { get; set; }

Public Property CheckTrustedLists As Boolean

Default Value

False

Remarks

Set this property to true to enable the component to validate chain trust against an internal list of known Trusted Lists (such as EUTL).

CRLs Property (ASiCVerifier Component)

A collection of certificate revocation lists embedded into the signature by the signer.

Syntax

• C#
• VB.NET

public CRLList CRLs { get; }

Public ReadOnly Property CRLs As CRLList

Remarks

Use this property to access the CRLs embedded into the signature by the signer.

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

ExtractionMode Property (ASiCVerifier Component)

Specifies which entries should be extracted from the container upon verification.

Syntax

• C#
• VB.NET

public ASiCVerifierExtractionModes ExtractionMode { get; set; }

enum ASiCVerifierExtractionModes {
  aemNone,
  aemAll,
  aemSigned,
  aemSignedAndValid
}

Public Property ExtractionMode As AsicverifierExtractionModes

Enum ASiCVerifierExtractionModes
  aemNone
  aemAll
  aemSigned
  aemSignedAndValid
End Enum

Default Value

0

Remarks

Use this property to choose entries that should be extracted in the Verify method. Choose between extracting all files, signed-only, signed and with verified signature, and none at all (verify-only mode).

Files Property (ASiCVerifier Component)

Lists all files contained in the container.

Syntax

• C#
• VB.NET

public ArchivedFileList Files { get; }

Public ReadOnly Property Files As ArchivedFileList

Remarks

Use this collection property to walk through the list of files contained in the archive.

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

FIPSMode Property (ASiCVerifier 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.

IgnoreChainValidationErrors Property (ASiCVerifier Component)

Makes the component tolerant to chain validation errors.

Syntax

• C#
• VB.NET

public bool IgnoreChainValidationErrors { get; set; }

Public Property IgnoreChainValidationErrors As Boolean

Default Value

False

Remarks

If this property is set to True, any errors emerging during certificate chain validation will be ignored. This setting may be handy if the purpose of validation is the creation of an LTV signature, and the validation is performed in an environment that doesn't trust the signer's certificate chain.

InputBytes Property (ASiCVerifier 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 (ASiCVerifier Component)

A path to the ASiC container to process.

Syntax

• C#
• VB.NET

public string InputFile { get; set; }

Public Property InputFile As String

Default Value

""

Remarks

Use this property to provide a path to the signature container. Use InputStream to provide the container from memory rather than a disk file.

InputStream Property (ASiCVerifier Component)

A stream containing ASiC data.

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 feed ASiC data to the component from a stream object.

This property is not available at design time.

KnownCertificates Property (ASiCVerifier Component)

Additional certificates for chain validation.

Syntax

• C#
• VB.NET

public CertificateList KnownCertificates { get; }

Public Property KnownCertificates As CertificateList

Remarks

Use this property to supply a list of additional certificates that might be needed for chain validation. An example of a scenario where you might want to do that is when intermediary CA certificates are absent from the standard system locations (or when there are no standard system locations), and therefore should be supplied to the component manually.

The purpose of the certificates to be added to this collection is roughly equivalent to that of the Intermediate Certification Authorities system store in Windows.

Do not add trust anchors or root certificates to this collection: add them to TrustedCertificates instead.

This property is not available at design time.

KnownCRLs Property (ASiCVerifier Component)

Additional CRLs for chain validation.

Syntax

• C#
• VB.NET

public CRLList KnownCRLs { get; }

Public Property KnownCRLs As CRLList

Remarks

Use this property to supply additional CRLs that might be needed for chain validation. This property may be helpful when a chain is validated in offline mode, and the associated CRLs are stored separately from the signed message or document.

This property is not available at design time.

KnownOCSPs Property (ASiCVerifier Component)

Additional OCSP responses for chain validation.

Syntax

• C#
• VB.NET

public OCSPResponseList KnownOCSPs { get; }

Public Property KnownOCSPs As OCSPResponseList

Remarks

Use this property to supply additional OCSP responses that might be needed for chain validation. This property may be helpful when a chain is validated in offline mode, and the associated OCSP responses are stored separately from the signed message or document.

This property is not available at design time.

OCSPs Property (ASiCVerifier Component)

A collection of OCSP responses embedded into the signature.

Syntax

• C#
• VB.NET

public OCSPResponseList OCSPs { get; }

Public ReadOnly Property OCSPs As OCSPResponseList

Remarks

Use this property to access the OCSP responses embedded into the signature by its creator.

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

OfflineMode Property (ASiCVerifier Component)

Switches the component to offline mode.

Syntax

• C#
• VB.NET

public bool OfflineMode { get; set; }

Public Property OfflineMode As Boolean

Default Value

False

Remarks

When working in offline mode, the component restricts itself from using any online revocation information sources, such as CRL or OCSP responders.

Offline mode may be useful if there is a need to verify the completeness of the validation information included within the signature or provided via KnownCertificates, KnownCRLs, and other related properties.

OutputBytes Property (ASiCVerifier 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 (ASiCVerifier Component)

The file where the processed data will be saved.

Syntax

• C#
• VB.NET

public string OutputFile { get; set; }

Public Property OutputFile As String

Default Value

""

Remarks

Provides a path to the file where the component should save the updated container.

OutputPath Property (ASiCVerifier Component)

A local path to extract the files to.

Syntax

• C#
• VB.NET

public string OutputPath { get; set; }

Public Property OutputPath As String

Default Value

""

Remarks

Assign this property with a path where the extracted files (selected according to ExtractionMode criteria) are to be saved.

OutputStream Property (ASiCVerifier Component)

The stream where the file is to be extracted.

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 specify the stream to take the data extracted from the container.

This property is not available at design time.

Profile Property (ASiCVerifier Component)

Specifies a pre-defined profile to apply when creating the signature.

Syntax

• C#
• VB.NET

public string Profile { get; set; }

Public Property Profile As String

Default Value

""

Remarks

Advanced signatures come in many variants, which are often defined by parties that needs to process them or by local standards. SecureBlackbox profiles are sets of pre-defined configurations which correspond to particular signature variants. By specifying a profile, you are pre-configuring the component to make it produce the signature that matches the configuration corresponding to that profile.

Proxy Property (ASiCVerifier Component)

The proxy server settings.

Syntax

• C#
• VB.NET

public ProxySettings Proxy { get; }

Public ReadOnly Property Proxy As ProxySettings

Remarks

Use this property to tune up the proxy server settings.

This property is read-only.

RevocationCheck Property (ASiCVerifier Component)

Specifies the kind(s) of revocation check to perform for all chain certificates.

Syntax

• C#
• VB.NET

public ASiCVerifierRevocationChecks RevocationCheck { get; set; }

enum ASiCVerifierRevocationChecks {
  crcNone,
  crcAuto,
  crcAllCRL,
  crcAllOCSP,
  crcAllCRLAndOCSP,
  crcAnyCRL,
  crcAnyOCSP,
  crcAnyCRLOrOCSP,
  crcAnyOCSPOrCRL
}

Public Property RevocationCheck As AsicverifierRevocationChecks

Enum ASiCVerifierRevocationChecks
  crcNone
  crcAuto
  crcAllCRL
  crcAllOCSP
  crcAllCRLAndOCSP
  crcAnyCRL
  crcAnyOCSP
  crcAnyCRLOrOCSP
  crcAnyOCSPOrCRL
End Enum

Default Value

1

Remarks

Revocation checking is necessary to ensure the integrity of the chain and obtain up-to-date certificate validity and trustworthiness information.

Certificate Revocation Lists (CRLs) and Online Certificate Status Protocol (OCSP) responses serve the same purpose of ensuring that the certificate had not been revoked by the Certificate Authority (CA) at the time of use. Depending on your circumstances and security policy requirements, you may want to use either one or both of the revocation information source types.

This setting controls the way the revocation checks are performed for every certificate in the chain. Typically certificates come with two types of revocation information sources: CRL (certificate revocation lists) and OCSP responders. CRLs are static objects periodically published by the CA at some online location. OCSP responders are active online services maintained by the CA that can provide up-to-date information on certificate statuses in near real time.

There are some conceptual differences between the two. CRLs are normally larger in size. Their use involves some latency because there is normally some delay between the time when a certificate was revoked and the time the subsequent CRL mentioning that is published. The benefits of CRL is that the same object can provide statuses for all certificates issued by a particular CA, and that the whole technology is much simpler than OCSP (and thus is supported by more CAs).

This setting lets you adjust the validation course by including or excluding certain types of revocation sources from the validation process. The crcAnyOCSPOrCRL setting (give preference to the faster OCSP route and only demand one source to succeed) is a good choice for most typical validation environments. The "crcAll*" modes are much stricter, and may be used in scenarios where bulletproof validity information is essential.

Note: If no CRL or OCSP endpoints are provided by the CA, the revocation check will be considered successful. This is because the CA chose not to supply revocation information for its certificates, meaning they are considered irrevocable.

Note: Within each of the above settings, if any retrieved CRL or OCSP response indicates that the certificate has been revoked, the revocation check fails.

Signatures Property (ASiCVerifier Component)

Contains the list of signatures included in the ASiC container.

Syntax

• C#
• VB.NET

public ASiCSignatureList Signatures { get; }

Public ReadOnly Property Signatures As ASiCSignatureList

Remarks

Use this property to access all signatures in the container.

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

SocketSettings Property (ASiCVerifier Component)

Manages network connection settings.

Syntax

• C#
• VB.NET

public SocketSettings SocketSettings { get; }

Public ReadOnly Property SocketSettings As SocketSettings

Remarks

Use this property to tune up network connection parameters.

This property is read-only.

Timestamps Property (ASiCVerifier Component)

Contains a collection of timestamps for the processed document.

Syntax

• C#
• VB.NET

public TimestampInfoList Timestamps { get; }

Public ReadOnly Property Timestamps As TimestampInfoList

Remarks

Use this property to access the timestamps included in the processed document.

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

TLSClientChain Property (ASiCVerifier Component)

The TLS client certificate chain.

Syntax

• C#
• VB.NET

public CertificateList TLSClientChain { get; }

Public Property TLSClientChain As CertificateList

Remarks

Assign a certificate chain to this property to enable TLS client authentication in the component. Note that the client's end-entity certificate should have a private key associated with it.

Use the CertificateStorage or CertificateManager components to import the certificate from a file, system store, or PKCS11 device.

This property is not available at design time.

TLSServerChain Property (ASiCVerifier Component)

The TLS server's certificate chain.

Syntax

• C#
• VB.NET

public CertificateList TLSServerChain { get; }

Public ReadOnly Property TLSServerChain As CertificateList

Remarks

Use this property to access the certificate chain sent by the TLS server. This property is ready to read when the TLSCertValidate event is fired by the client component.

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

TLSSettings Property (ASiCVerifier Component)

Manages TLS layer settings.

Syntax

• C#
• VB.NET

public TLSSettings TLSSettings { get; }

Public ReadOnly Property TLSSettings As TLSSettings

Remarks

Use this property to tune up the TLS layer parameters.

This property is read-only.

TrustedCertificates Property (ASiCVerifier Component)

A list of trusted certificates for chain validation.

Syntax

• C#
• VB.NET

public CertificateList TrustedCertificates { get; }

Public Property TrustedCertificates As CertificateList

Remarks

Use this property to supply a list of trusted certificates that might be needed for chain validation. An example of a scenario where you might want to do that is when root CA certificates are absent from the standard system locations (or when there are no standard system locations), and therefore should be supplied to the component manually.

The purpose of this certificate collection is largely the same as that of the Windows Trusted Root Certification Authorities system store.

Use this property with extreme care as it directly affects chain verifiability; a wrong certificate added to the trusted list may result in bad chains being accepted, and forfeited signatures being recognized as genuine. Only add certificates that originate from the parties that you know and trust.

This property is not available at design time.

ValidationMoment Property (ASiCVerifier Component)

The time point at which signature validity is to be established.

Syntax

• C#
• VB.NET

public string ValidationMoment { get; set; }

Public Property ValidationMoment As String

Default Value

""

Remarks

Use this property to specify the moment in time at which signature validity should be established. The time is in UTC. Leave the setting empty to stick to the default moment (either the signature creation time or the current time).

The validity of the same signature may differ depending on the time point chosen due to temporal changes in chain validities, revocation statuses, and timestamp times.

Close Method (ASiCVerifier Component)

Closes an opened container.

Syntax

• C#
• VB.NET

public void Close(bool saveChanges);

Public Sub Close(ByVal SaveChanges As Boolean)

Remarks

Use this method to close a previously opened container. Set SaveChanges to true to apply any changes made.

Config Method (ASiCVerifier 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.

DoAction Method (ASiCVerifier 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;....

Common ActionIDs:

ExtractFile Method (ASiCVerifier Component)

Extracts a file to one of the output media (bytes, stream, or disk file).

Syntax

• C#
• VB.NET

public void ExtractFile(string fileName);

Public Sub ExtractFile(ByVal FileName As String)

Remarks

Use this method to extract a single archived

ExtractFiles Method (ASiCVerifier Component)

Extracts files covered by a signature to OutputPath .

Syntax

• C#
• VB.NET

public void ExtractFiles(string sigLabel);

Public Sub ExtractFiles(ByVal SigLabel As String)

Remarks

Use this method to extract all files covered by the signature SigLabel to OutputPath. Set SigLabel to "" to extract all the files included in the container.

Open Method (ASiCVerifier Component)

Opens an existing container for signing or updating.

Syntax

• C#
• VB.NET

public void Open();

Public Sub Open()

Remarks

Use this method to open a container for signing or updating. When finished, call Close to complete or discard the operation.

Reset Method (ASiCVerifier Component)

Resets the component settings.

Syntax

• C#
• VB.NET

public void Reset();

Public Sub Reset()

Remarks

Reset is a generic method available in every component.

Revalidate Method (ASiCVerifier Component)

Revalidates a signature in accordance with current settings.

Syntax

• C#
• VB.NET

public void Revalidate(string sigLabel);

Public Sub Revalidate(ByVal SigLabel As String)

Remarks

Use this method to re-validate a signature in the opened ASiC document.

SelectInfo Method (ASiCVerifier Component)

Select signature information for a specific entity.

Syntax

• C#
• VB.NET

public void SelectInfo(string entityLabel, int infoType, bool clearSelection);

Public Sub SelectInfo(ByVal EntityLabel As String, ByVal InfoType As Integer, ByVal ClearSelection As Boolean)

Remarks

Use this method to select (or filter) signature-related information for a specific signature element.

Provide the unique label of the entity that you are interested in via the EntityLabel parameter. Use one of the following filters, or their combination, to specify what information you are interested in:

Following the call, the relevant pieces of information will be copied to the respective component properties (Certificates, CRLs, OCSPs). Note that you can accumulate information in the properties by making repeated calls to SelectInfo and keeping ClearSelection set to false.

This method is useful if you would like to read/display detailed information about a particular signature or timestamp.

Unsign Method (ASiCVerifier Component)

Deletes a signature from the container.

Syntax

• C#
• VB.NET

public void Unsign(string sigLabel);

Public Sub Unsign(ByVal SigLabel As String)

Remarks

Use this method to delete an existing signature from the container. Use SigLabel parameter to specify the signature to be removed.

Verify Method (ASiCVerifier Component)

Verifies all signatures in the ASiC container.

Syntax

• C#
• VB.NET

public void Verify();

Public Sub Verify()

Remarks

Use this method to verify the signature and any associated signed files residing in the ASiC container.

When processing the container, the verifier walks through all the signatures contained in the message, one after another.

For each signature, the SignatureFound event is thrown. The benefits of this are that it:

• Lets you know some basic details about the signature and its creator
• Allows you to tell the component whether or not you want to validate it and/or its signing certificate's chain
• Gives you a chance to provide any missing certificates (CertFound indicates whether you need to do that)

The control's properties remain assigned with the last processed signature's details, and are still available after the Verify() call returns, providing a handy way to work with single-signature containers.

Once the main signature's processing completes, the control proceeds to its subordinate elements (countersignatures and/or timestamps). Each timestamp is reported via TimestampValidated event.

Having reported all the countersignatures and timestamps, the control proceeds to the next main signature and any timestamps associated with it - and so on.

ChainElementDownload Event (ASiCVerifier Component)

Fires when there is a need to download a chain element from an online source.

Syntax

• C#
• VB.NET

public event OnChainElementDownloadHandler OnChainElementDownload;

public delegate void OnChainElementDownloadHandler(object sender, ASiCVerifierChainElementDownloadEventArgs e);

public class ASiCVerifierChainElementDownloadEventArgs : EventArgs {
  public int Kind { get; }
  public string CertRDN { get; }
  public string CACertRDN { get; }
  public string Location { get; }
  public int Action { get; set; }
}

Public Event OnChainElementDownload As OnChainElementDownloadHandler

Public Delegate Sub OnChainElementDownloadHandler(sender As Object, e As ASiCVerifierChainElementDownloadEventArgs)

Public Class ASiCVerifierChainElementDownloadEventArgs Inherits EventArgs
  Public ReadOnly Property Kind As Integer
  Public ReadOnly Property CertRDN As String
  Public ReadOnly Property CACertRDN As String
  Public ReadOnly Property Location As String
  Public Property Action As Integer
End Class

Remarks

Subscribe to this event to be notified about validation element retrievals. Use the Action parameter to suppress the download if required.

ChainElementNeeded Event (ASiCVerifier Component)

Fires when an element required to validate the chain was not located.

Syntax

• C#
• VB.NET

public event OnChainElementNeededHandler OnChainElementNeeded;

public delegate void OnChainElementNeededHandler(object sender, ASiCVerifierChainElementNeededEventArgs e);

public class ASiCVerifierChainElementNeededEventArgs : EventArgs {
  public int Kind { get; }
  public string CertRDN { get; }
  public string CACertRDN { get; }
}

Public Event OnChainElementNeeded As OnChainElementNeededHandler

Public Delegate Sub OnChainElementNeededHandler(sender As Object, e As ASiCVerifierChainElementNeededEventArgs)

Public Class ASiCVerifierChainElementNeededEventArgs Inherits EventArgs
  Public ReadOnly Property Kind As Integer
  Public ReadOnly Property CertRDN As String
  Public ReadOnly Property CACertRDN As String
End Class

Remarks

Subscribe to this event to be notified about missing validation elements. Use the KnownCRLs, KnownCertificates, and KnownOCSPs properties in the event handler to provide the missing piece.

ChainElementStore Event (ASiCVerifier Component)

This event is fired when a chain element (certificate, CRL, or OCSP response) should be stored along with a signature.

Syntax

• C#
• VB.NET

public event OnChainElementStoreHandler OnChainElementStore;

public delegate void OnChainElementStoreHandler(object sender, ASiCVerifierChainElementStoreEventArgs e);

public class ASiCVerifierChainElementStoreEventArgs : EventArgs {
  public int Kind { get; }
  public byte[] Body { get; }
  public string URI { get; set; }
}

Public Event OnChainElementStore As OnChainElementStoreHandler

Public Delegate Sub OnChainElementStoreHandler(sender As Object, e As ASiCVerifierChainElementStoreEventArgs)

Public Class ASiCVerifierChainElementStoreEventArgs Inherits EventArgs
  Public ReadOnly Property Kind As Integer
  Public ReadOnly Property Body As Byte()
  Public Property URI As String
End Class

Remarks

This event could occur if you are verifying XAdES-C form or higher. The Body parameter contains the element in binary form that should be stored along with a signature. Use the URI parameter to provide an URI of the stored element.

ChainValidated Event (ASiCVerifier Component)

Reports the completion of a certificate chain validation.

Syntax

• C#
• VB.NET

public event OnChainValidatedHandler OnChainValidated;

public delegate void OnChainValidatedHandler(object sender, ASiCVerifierChainValidatedEventArgs e);

public class ASiCVerifierChainValidatedEventArgs : EventArgs {
  public int Index { get; }
  public string EntityLabel { get; }
  public string SubjectRDN { get; }
  public int ValidationResult { get; }
  public int ValidationDetails { get; }
  public bool Cancel { get; set; }
}

Public Event OnChainValidated As OnChainValidatedHandler

Public Delegate Sub OnChainValidatedHandler(sender As Object, e As ASiCVerifierChainValidatedEventArgs)

Public Class ASiCVerifierChainValidatedEventArgs Inherits EventArgs
  Public ReadOnly Property Index As Integer
  Public ReadOnly Property EntityLabel As String
  Public ReadOnly Property SubjectRDN As String
  Public ReadOnly Property ValidationResult As Integer
  Public ReadOnly Property ValidationDetails As Integer
  Public Property Cancel As Boolean
End Class

Remarks

This event is fired when a certificate chain validation routine completes. SubjectRDN identifies the owner of the validated certificate.

ValidationResult set to 0 (zero) indicates successful chain validation.

ChainValidationProgress Event (ASiCVerifier Component)

This event is fired multiple times during chain validation to report various stages of the validation procedure.

Syntax

• C#
• VB.NET

public event OnChainValidationProgressHandler OnChainValidationProgress;

public delegate void OnChainValidationProgressHandler(object sender, ASiCVerifierChainValidationProgressEventArgs e);

public class ASiCVerifierChainValidationProgressEventArgs : EventArgs {
  public string EventKind { get; }
  public string CertRDN { get; }
  public string CACertRDN { get; }
  public int Action { get; set; }
}

Public Event OnChainValidationProgress As OnChainValidationProgressHandler

Public Delegate Sub OnChainValidationProgressHandler(sender As Object, e As ASiCVerifierChainValidationProgressEventArgs)

Public Class ASiCVerifierChainValidationProgressEventArgs Inherits EventArgs
  Public ReadOnly Property EventKind As String
  Public ReadOnly Property CertRDN As String
  Public ReadOnly Property CACertRDN As String
  Public Property Action As Integer
End Class

Remarks

Subscribe to this event to be notified about chain validation progress. Use the Action parameter to alter the validation flow.

The EventKind parameter reports the nature of the event being reported. The CertRDN and CACertRDN parameters report the distinguished names of the certificates that are relevant for the event invocation (one or both can be empty, depending on EventKind). Use the Action parameter to adjust the validation flow.

ContainerLoaded Event (ASiCVerifier Component)

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

Syntax

• C#
• VB.NET

public event OnContainerLoadedHandler OnContainerLoaded;

public delegate void OnContainerLoadedHandler(object sender, ASiCVerifierContainerLoadedEventArgs e);

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

Public Event OnContainerLoaded As OnContainerLoadedHandler

Public Delegate Sub OnContainerLoadedHandler(sender As Object, e As ASiCVerifierContainerLoadedEventArgs)

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

Remarks

The handler for this event is a good place to check for any existing signatures and validate them if required.

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

Error Event (ASiCVerifier Component)

Information about errors during ASiC signature verification.

Syntax

• C#
• VB.NET

public event OnErrorHandler OnError;

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

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

Public Event OnError As OnErrorHandler

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

Public Class ASiCVerifierErrorEventArgs 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 ASiC signature verification.

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

FileExtractionStart Event (ASiCVerifier Component)

Signifies the start of a file extraction process.

Syntax

• C#
• VB.NET

public event OnFileExtractionStartHandler OnFileExtractionStart;

public delegate void OnFileExtractionStartHandler(object sender, ASiCVerifierFileExtractionStartEventArgs e);

public class ASiCVerifierFileExtractionStartEventArgs : EventArgs {
  public string FileName { get; }
  public long FileSize { get; }
  public string ModDate { get; }
  public bool Extract { get; set; }
  public string DestFile { get; set; }
}

Public Event OnFileExtractionStart As OnFileExtractionStartHandler

Public Delegate Sub OnFileExtractionStartHandler(sender As Object, e As ASiCVerifierFileExtractionStartEventArgs)

Public Class ASiCVerifierFileExtractionStartEventArgs Inherits EventArgs
  Public ReadOnly Property FileName As String
  Public ReadOnly Property FileSize As Long
  Public ReadOnly Property ModDate As String
  Public Property Extract As Boolean
  Public Property DestFile As String
End Class

Remarks

This event fires for every file located in the archive and matching the ExtractionMode setting before it is to be extracted.

DestFile indicates the path where the file will be saved to. You can alter the destination path here, by providing an alternative extraction path.

Set DestFile to an empty string and provide a stream object via the OutputStream property if you prefer to save the data to a stream instead of file.

If DestFile is set to an empty string and OutputStream is unassigned, the file will not be extracted.

Alternatively, you can request the extracted content to be saved into a byte array. To do this, leave DestFile and OutputStream empty, and keep the Extract parameter enabled.

Please take care when extracting large files into byte arrays, as those may consume large amounts of memory.

Note: if DestFile already exists, the component will overwrite it. To prevent overwriting of existing files, subscribe to this event, and change DestFile when needed.

Notification Event (ASiCVerifier 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, ASiCVerifierNotificationEventArgs e);

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

Public Event OnNotification As OnNotificationHandler

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

Public Class ASiCVerifierNotificationEventArgs 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.

This component can fire this event with the following EventID values:

SignatureFound Event (ASiCVerifier Component)

Signifies the start of signature validation.

Syntax

• C#
• VB.NET

public event OnSignatureFoundHandler OnSignatureFound;

public delegate void OnSignatureFoundHandler(object sender, ASiCVerifierSignatureFoundEventArgs e);

public class ASiCVerifierSignatureFoundEventArgs : EventArgs {
  public int Index { get; }
  public string EntityLabel { get; }
  public string IssuerRDN { get; }
  public byte[] SerialNumber { get; }
  public byte[] SubjectKeyID { get; }
  public bool CertFound { get; }
  public bool ValidateSignature { get; set; }
  public bool ValidateChain { get; set; }
}

Public Event OnSignatureFound As OnSignatureFoundHandler

Public Delegate Sub OnSignatureFoundHandler(sender As Object, e As ASiCVerifierSignatureFoundEventArgs)

Public Class ASiCVerifierSignatureFoundEventArgs Inherits EventArgs
  Public ReadOnly Property Index As Integer
  Public ReadOnly Property EntityLabel As String
  Public ReadOnly Property IssuerRDN As String
  Public ReadOnly Property SerialNumber As Byte()
  Public ReadOnly Property SubjectKeyID As Byte()
  Public ReadOnly Property CertFound As Boolean
  Public Property ValidateSignature As Boolean
  Public Property ValidateChain As Boolean
End Class

Remarks

This event tells the application that signature validation is about to start, and provides the details about the signer's certificate via its IssuerRDN, SerialNumber, and SubjectKeyID parameters. It fires for every signature located in the verified document or message.

The CertFound parameter is set to True if the component has found the needed certificate in one of the known locations, and to False otherwise, in which case you must provide it manually via the KnownCertificates property.

Signature validation consists of two independent stages: cryptographic signature validation and chain validation. Separate validation results are reported for each, with the SignatureValidationResult and ChainValidationResult properties respectively.

Use the ValidateSignature and ValidateChain parameters to tell the verifier which stages to include in the validation.

SignatureValidated Event (ASiCVerifier Component)

Marks the completion of the signature validation routine.

Syntax

• C#
• VB.NET

public event OnSignatureValidatedHandler OnSignatureValidated;

public delegate void OnSignatureValidatedHandler(object sender, ASiCVerifierSignatureValidatedEventArgs e);

public class ASiCVerifierSignatureValidatedEventArgs : EventArgs {
  public int Index { get; }
  public string EntityLabel { get; }
  public string IssuerRDN { get; }
  public byte[] SerialNumber { get; }
  public byte[] SubjectKeyID { get; }
  public int ValidationResult { get; }
  public bool Cancel { get; set; }
}

Public Event OnSignatureValidated As OnSignatureValidatedHandler

Public Delegate Sub OnSignatureValidatedHandler(sender As Object, e As ASiCVerifierSignatureValidatedEventArgs)

Public Class ASiCVerifierSignatureValidatedEventArgs Inherits EventArgs
  Public ReadOnly Property Index As Integer
  Public ReadOnly Property EntityLabel As String
  Public ReadOnly Property IssuerRDN As String
  Public ReadOnly Property SerialNumber As Byte()
  Public ReadOnly Property SubjectKeyID As Byte()
  Public ReadOnly Property ValidationResult As Integer
  Public Property Cancel As Boolean
End Class

Remarks

This event is fired upon the completion of the signature validation routine, and reports the respective validation result.

Use the IssuerRDN, SerialNumber, and/or SubjectKeyID parameters to identify the signing certificate.

ValidationResult is set to 0 if the validation has been successful, or to a non-zero value in case of a validation failure.

TimestampFound Event (ASiCVerifier Component)

Signifies the start of a timestamp validation routine.

Syntax

• C#
• VB.NET

public event OnTimestampFoundHandler OnTimestampFound;

public delegate void OnTimestampFoundHandler(object sender, ASiCVerifierTimestampFoundEventArgs e);

public class ASiCVerifierTimestampFoundEventArgs : EventArgs {
  public int Index { get; }
  public string EntityLabel { get; }
  public string IssuerRDN { get; }
  public byte[] SerialNumber { get; }
  public byte[] SubjectKeyID { get; }
  public bool CertFound { get; }
  public bool ValidateTimestamp { get; set; }
  public bool ValidateChain { get; set; }
}

Public Event OnTimestampFound As OnTimestampFoundHandler

Public Delegate Sub OnTimestampFoundHandler(sender As Object, e As ASiCVerifierTimestampFoundEventArgs)

Public Class ASiCVerifierTimestampFoundEventArgs Inherits EventArgs
  Public ReadOnly Property Index As Integer
  Public ReadOnly Property EntityLabel As String
  Public ReadOnly Property IssuerRDN As String
  Public ReadOnly Property SerialNumber As Byte()
  Public ReadOnly Property SubjectKeyID As Byte()
  Public ReadOnly Property CertFound As Boolean
  Public Property ValidateTimestamp As Boolean
  Public Property ValidateChain As Boolean
End Class

Remarks

This event fires for every timestamp identified during signature processing, and reports the details about the signer's certificate via its IssuerRDN, SerialNumber, and SubjectKeyID parameters.

The CertFound parameter is set to True if the component has found the needed certificate in one of the known locations, and to False otherwise, in which case you must provide it manually via the KnownCertificates property.

Just like with signature validation, timestamp validation consists of two independent stages: cryptographic signature validation and chain validation. Separate validation results are reported for each, with the ValidationResult and ChainValidationResult properties respectively.

Use the ValidateSignature and ValidateChain parameters to tell the verifier which stages to include in the validation.

TimestampValidated Event (ASiCVerifier Component)

Reports the completion of the timestamp validation routine.

Syntax

• C#
• VB.NET

public event OnTimestampValidatedHandler OnTimestampValidated;

public delegate void OnTimestampValidatedHandler(object sender, ASiCVerifierTimestampValidatedEventArgs e);

public class ASiCVerifierTimestampValidatedEventArgs : EventArgs {
  public int Index { get; }
  public string EntityLabel { get; }
  public string IssuerRDN { get; }
  public byte[] SerialNumber { get; }
  public byte[] SubjectKeyID { get; }
  public string Time { get; }
  public int ValidationResult { get; }
  public int ChainValidationResult { get; }
  public int ChainValidationDetails { get; }
  public bool Cancel { get; set; }
}

Public Event OnTimestampValidated As OnTimestampValidatedHandler

Public Delegate Sub OnTimestampValidatedHandler(sender As Object, e As ASiCVerifierTimestampValidatedEventArgs)

Public Class ASiCVerifierTimestampValidatedEventArgs Inherits EventArgs
  Public ReadOnly Property Index As Integer
  Public ReadOnly Property EntityLabel As String
  Public ReadOnly Property IssuerRDN As String
  Public ReadOnly Property SerialNumber As Byte()
  Public ReadOnly Property SubjectKeyID As Byte()
  Public ReadOnly Property Time As String
  Public ReadOnly Property ValidationResult As Integer
  Public ReadOnly Property ChainValidationResult As Integer
  Public ReadOnly Property ChainValidationDetails As Integer
  Public Property Cancel As Boolean
End Class

Remarks

This event is fired upon the completion of the timestamp validation routine, and reports the respective validation result.

ValidationResult is set to 0 if the validation has been successful, or to a non-zero value in case of a failure.

TLSCertNeeded Event (ASiCVerifier Component)

Fires when a remote TLS party requests a client certificate.

Syntax

• C#
• VB.NET

public event OnTLSCertNeededHandler OnTLSCertNeeded;

public delegate void OnTLSCertNeededHandler(object sender, ASiCVerifierTLSCertNeededEventArgs e);

public class ASiCVerifierTLSCertNeededEventArgs : EventArgs {
  public string Host { get; }
  public string CANames { get; }
}

Public Event OnTLSCertNeeded As OnTLSCertNeededHandler

Public Delegate Sub OnTLSCertNeededHandler(sender As Object, e As ASiCVerifierTLSCertNeededEventArgs)

Public Class ASiCVerifierTLSCertNeededEventArgs Inherits EventArgs
  Public ReadOnly Property Host As String
  Public ReadOnly Property CANames As String
End Class

Remarks

This event fires to notify the implementation that a remote TLS server has requested a client certificate. The Host parameter identifies the host that makes a request, and the CANames parameter (optional, according to the TLS spec) advises on the accepted issuing CAs.

Use the TLSClientChain property in response to this event to provide the requested certificate. Please make sure the client certificate includes the associated private key. Note that you may set the certificates before the connection without waiting for this event to fire.

This event is preceded by the TLSHandshake event for the given host and, if the certificate was accepted, succeeded by the TLSEstablished event.

TLSCertValidate Event (ASiCVerifier Component)

This event is fired upon receipt of the TLS server's certificate, allowing the user to control its acceptance.

Syntax

• C#
• VB.NET

public event OnTLSCertValidateHandler OnTLSCertValidate;

public delegate void OnTLSCertValidateHandler(object sender, ASiCVerifierTLSCertValidateEventArgs e);

public class ASiCVerifierTLSCertValidateEventArgs : EventArgs {
  public string ServerHost { get; }
  public string ServerIP { get; }
  public bool Accept { get; set; }
}

Public Event OnTLSCertValidate As OnTLSCertValidateHandler

Public Delegate Sub OnTLSCertValidateHandler(sender As Object, e As ASiCVerifierTLSCertValidateEventArgs)

Public Class ASiCVerifierTLSCertValidateEventArgs Inherits EventArgs
  Public ReadOnly Property ServerHost As String
  Public ReadOnly Property ServerIP As String
  Public Property Accept As Boolean
End Class

Remarks

This event is fired during a TLS handshake. Use the TLSServerChain property to access the certificate chain. In general, components may contact a number of TLS endpoints during their work, depending on their configuration.

Accept is assigned in accordance with the outcome of the internal validation check performed by the component, and can be adjusted if needed.

TLSEstablished Event (ASiCVerifier Component)

Fires when a TLS handshake with Host successfully completes.

Syntax

• C#
• VB.NET

public event OnTLSEstablishedHandler OnTLSEstablished;

public delegate void OnTLSEstablishedHandler(object sender, ASiCVerifierTLSEstablishedEventArgs e);

public class ASiCVerifierTLSEstablishedEventArgs : EventArgs {
  public string Host { get; }
  public string Version { get; }
  public string Ciphersuite { get; }
  public byte[] ConnectionId { get; }
  public bool Abort { get; set; }
}

Public Event OnTLSEstablished As OnTLSEstablishedHandler

Public Delegate Sub OnTLSEstablishedHandler(sender As Object, e As ASiCVerifierTLSEstablishedEventArgs)

Public Class ASiCVerifierTLSEstablishedEventArgs Inherits EventArgs
  Public ReadOnly Property Host As String
  Public ReadOnly Property Version As String
  Public ReadOnly Property Ciphersuite As String
  Public ReadOnly Property ConnectionId As Byte()
  Public Property Abort As Boolean
End Class

Remarks

The component uses this event to notify the application about a successful completion of a TLS handshake.

The Version, Ciphersuite, and ConnectionId parameters indicate the security parameters of the new connection. Use the Abort parameter if you need to terminate the connection at this stage.

TLSHandshake Event (ASiCVerifier Component)

Fires when a new TLS handshake is initiated, before the handshake commences.

Syntax

• C#
• VB.NET

public event OnTLSHandshakeHandler OnTLSHandshake;

public delegate void OnTLSHandshakeHandler(object sender, ASiCVerifierTLSHandshakeEventArgs e);

public class ASiCVerifierTLSHandshakeEventArgs : EventArgs {
  public string Host { get; }
  public bool Abort { get; set; }
}

Public Event OnTLSHandshake As OnTLSHandshakeHandler

Public Delegate Sub OnTLSHandshakeHandler(sender As Object, e As ASiCVerifierTLSHandshakeEventArgs)

Public Class ASiCVerifierTLSHandshakeEventArgs Inherits EventArgs
  Public ReadOnly Property Host As String
  Public Property Abort As Boolean
End Class

Remarks

The component uses this event to notify the application about the start of a new TLS handshake to Host. If the handshake is successful, this event will be followed by the TLSEstablished event. If the server chooses to request a client certificate, the TLSCertNeeded event will also be fired.

TLSShutdown Event (ASiCVerifier Component)

Reports the graceful closure of a TLS connection.

Syntax

• C#
• VB.NET

public event OnTLSShutdownHandler OnTLSShutdown;

public delegate void OnTLSShutdownHandler(object sender, ASiCVerifierTLSShutdownEventArgs e);

public class ASiCVerifierTLSShutdownEventArgs : EventArgs {
  public string Host { get; }
}

Public Event OnTLSShutdown As OnTLSShutdownHandler

Public Delegate Sub OnTLSShutdownHandler(sender As Object, e As ASiCVerifierTLSShutdownEventArgs)

Public Class ASiCVerifierTLSShutdownEventArgs Inherits EventArgs
  Public ReadOnly Property Host As String
End Class

Remarks

This event notifies the application about the closure of an earlier established TLS connection. Note that only graceful connection closures are reported.

ArchivedFile Type

Provides information about the compressed file.

Remarks

Use this type to access compressed file details.

Fields

Constructors

• C#
• VB.NET

public ArchivedFile();

Public ArchivedFile()

ASiCSignature Type

Represents a signature in the ASiC container.

Remarks

This type contains information about a signature found in ASiC container. It holds various information about the signature, including its coverage and validation results.

An ASiC-S container can include one CAdES, and/or one XAdES, and/or one Timestamp. An ASiC-E container can include multiple CAdES signatures, XAdES signatures, and timestamp tokens.

Fields

Constructors

• C#
• VB.NET

public ASiCSignature();

Public ASiCSignature()

Certificate Type

Encapsulates an individual X.509 certificate.

Remarks

This type keeps and 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)

• 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)

• 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)

• C#
• VB.NET

public Certificate(string path, string password);

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

• 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)

• C#
• VB.NET

public Certificate(string path);

Public Certificate(ByVal Path As String)

• C#
• VB.NET

public Certificate(System.IO.Stream stream);

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

• C#
• VB.NET

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

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

• 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)

• C#
• VB.NET

public Certificate();

Public Certificate()

CRL Type

Represents a Certificate Revocation List.

Remarks

CRLs store information about revoked certificates, i.e., certificates that have been identified as invalid by their issuing certificate authority (CA) for any number of reasons.

Each CRL object lists certificates from a single CA and identifies them by their serial numbers. A CA may or may not publish a CRL, may publish several CRLs, or may publish the same CRL in multiple locations.

Unlike OCSP responses, CRLs only list certificates that have been revoked. They do not list certificates that are still valid.

Fields

Constructors

• C#
• VB.NET

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

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

• C#
• VB.NET

public CRL(string location);

Public CRL(ByVal Location As String)

• C#
• VB.NET

public CRL(System.IO.Stream stream);

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

• C#
• VB.NET

public CRL();

Public CRL()

OCSPResponse Type

Represents a single OCSP response originating from an OCSP responder.

Remarks

OCSP is a protocol that allows verification of certificate status in real-time, and is an alternative to Certificate Revocation Lists (CRLs).

An OCSP response is a snapshot of the certificate status at a given time.

Fields

Constructors

• C#
• VB.NET

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

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

• C#
• VB.NET

public OCSPResponse(string location);