ASiCSigner Component

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The ASiCSigner component creates associated signature containers.

Syntax

nsoftware.SecureBlackbox.ASiCSigner

Remarks

ASiCSigner provides functionality for creating and updating Associated Signature Containers (ASiC). ASiC containers are used to bind together data, signed objects, and electronic signatures or timestamps, and store them in a standardized, cross-platform ZIP-compatible file.

ASiC has gained wide use across European countries (as part of eIDAS regulation) and beyond. Alongside other AdES formats (CAdES, XAdES, PAdES), it provides convenience of storing sets of heterogeneous data objects within a compatible container, providing data retention, self-sufficiency, and high interoperability options.

ASiC uses CAdES, XAdES, and RFC3161 timestamps as its building blocks, effectively allowing to expand these formats beyond their single-object limitation.

ASiCSigner supports all the ASiC capabilities as defined in the respective ETSI standards (ETSI EN 319 162), in particular:

• ASiC-S (simple) and ASiC-E (extended) signature profiles.
• CAdES- and XAdES-based signatures.
• RFC 3161 timestamps.
• All ETSI signature profiles (including B-B, B-T, B-LT, B-LTA).
• Short-term, long-term, and archivable signatures.
• Complete chain of trust validation process, using local, global, nation-specific (EUTL), or custom trust.
• Signing with local, remote, and hardware-based private keys.
• Creating new containers or updating/extending existing ones.
• Online and offline modes.

The component is being actively maintained and updated to account for 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.

ASiCSigner supports several work modes that differ in complexity, allowing for both 'quick' and 'flexible' use. The simple mode assumes providing the SourceFiles, the OutputFile, the SigningCertificate, and calling the one-pass Sign method. In this case the component will use its intelligence to create the most appropriate signature with the given parameters over the provided files.

More complex tune-up may involve fine-grained adjustment of properties of the NewSignature object, providing custom validation material (certificates, OCSPs, CRLs), setting up customized timestamping handlers for non-standard TSAs, or using a pre-defined signature Profile. You can also choose to work with the container step-by-step, by splitting the one-pass operation into individual Open/CreateNew, Sign, and Close calls. ASiCSigner signer = new ASiCSigner(); signer.setSourceFiles("./MyFile.txt \n./MySecondFile.txt"); // set path of the file/files you want to sign signer.setOutputFile("./SignedFile.scs"); // set path where the output should be saved signer.setSigningCertificate(new Certificate("./test.pfx","test")); // set the signing certificate signer.setExtended(true); // since we are signing multiple documents we set extended to true // set the signature type signer.getNewSignature().setSignatureType(ASiCSignature.castCAdES); signer.sign();

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.

AutoValidateSignatures Property (ASiCSigner Component)

Specifies whether ASiCSigner 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

False

Remarks

This setting is switched off by default to speed up document processing. Even if the document is loaded with this property set to false, you can validate the signatures manually on a later stage using the Revalidate method.

BlockedCertificates Property (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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.

Extended Property (ASiCSigner Component)

Specifies the type of ASiC signature.

Syntax

• C#
• VB.NET

public bool Extended { get; set; }

Public Property Extended As Boolean

Default Value

False

Remarks

A simple signature container (ASiC-S) can only be made over a single document, and use one signature format (a CAdES signature, a XAdES signature, or a timestamp)

An extended container (ASiC-E) can cover multiple documents and contain multiple signatures of different types. Set this property to true to create an extended ASiC container.

ExternalCrypto Property (ASiCSigner 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.

Files Property (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 ASiC container. Use InputStream to provide the container from memory rather than a disk file.

InputStream Property (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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.

NewSignature Property (ASiCSigner Component)

Provides access to new signature properties.

Syntax

• C#
• VB.NET

public ASiCSignature NewSignature { get; }

Public ReadOnly Property NewSignature As ASiCSignature

Remarks

Use this property to tune-up signature properties.

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

OCSPs Property (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner Component)

The file where the signed 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 store the container.

ASiC is essentially a ZIP archive, but it is recommended to use ".asics" or ".scs" extension for ASiC-S files, and ".asice" or ".sce" for ASiC-E files.

OutputPath Property (ASiCSigner 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 (ASiCSigner Component)

The stream where the container will be saved.

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 resulting signed data.

This property is not available at design time.

Profile Property (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner Component)

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

Syntax

• C#
• VB.NET

public ASiCSignerRevocationChecks RevocationCheck { get; set; }

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

Public Property RevocationCheck As AsicsignerRevocationChecks

Enum ASiCSignerRevocationChecks
  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 (ASiCSigner 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.

SigningCertificate Property (ASiCSigner Component)

The certificate to be used for signing.

Syntax

• C#
• VB.NET

public Certificate SigningCertificate { get; set; }

Public Property SigningCertificate As Certificate

Remarks

Use this property to specify the certificate that shall be used for signing the data. Note that this certificate should have a private key associated with it. Use SigningChain to supply the rest of the certificate chain for inclusion into the signature.

This property is not available at design time.

SigningChain Property (ASiCSigner Component)

The signing certificate chain.

Syntax

• C#
• VB.NET

public CertificateList SigningChain { get; }

Public Property SigningChain As CertificateList

Remarks

Use this property to provide the chain for the signing certificate. Use the SigningCertificate property, if it is available, to provide the signing certificate itself.

This property is not available at design time.

SocketSettings Property (ASiCSigner 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.

SourceBytes Property (ASiCSigner Component)

Use this property to pass the content to sign in the byte array form.

Syntax

• C#
• VB.NET

public byte[] SourceBytes { get; set; }

Public Property SourceBytes As Byte()

Remarks

Assign a byte array containing the source file to be signed to this property.

This property is not available at design time.

SourceFiles Property (ASiCSigner Component)

The files to be packed into the container.

Syntax

• C#
• VB.NET

public string SourceFiles { get; set; }

Public Property SourceFiles As String

Default Value

""

Remarks

Assign this property with a CRLF-separated list of paths to the files to be included in the container. Remember to enable the extended ASiC mode (set Extended to true) if signing more than one file.

SourceName Property (ASiCSigner Component)

Use this property to specify the name of the file being signed if passing it via the SourceBytes property.

Syntax

• C#
• VB.NET

public string SourceName { get; set; }

Public Property SourceName As String

Default Value

""

Remarks

Provide the name of the file to be included in the ASiC container if passing the file in the byte array form.

This property is not available at design time.

SourceStream Property (ASiCSigner Component)

Use this property to pass the content to sign in the stream form.

Syntax

• C#
• VB.NET

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

Public Property SourceStream As System.IO.Stream

Default Value

null

Remarks

Assign a stream containing the source file to be signed to this property.

This property is not available at design time.

Timestamps Property (ASiCSigner 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.

TimestampServer Property (ASiCSigner Component)

The address of the timestamping server.

Syntax

• C#
• VB.NET

public string TimestampServer { get; set; }

Public Property TimestampServer As String

Default Value

""

Remarks

Use this property to provide the address of the Time Stamping Authority (TSA) server to be used for timestamping the signature.

SecureBlackbox supports RFC3161-compliant timestamping servers, available via HTTP or HTTPS.

If your timestamping service enforces credential-based user authentication (basic or digest), you can provide the credentials in the same URL:

http://user:password@timestamp.server.com/TsaService

For TSAs using certificate-based TLS authentication, provide the client certificate via the TLSClientChain property.

If this property is left empty, no timestamp will be added to the signature.

Starting from summer 2021 update (Vol. 2), the virtual timestamping service is supported, which allows you to intervene in the timestamping routine and provide your own handling for the TSA exchange. This may be handy if the service that you are requesting timestamps from uses a non-standard TSP protocol or requires special authentication option.

To employ the virtual service, assign an URI of the following format to this property:

virtual://localhost?hashonly=true&includecerts=true&reqpolicy=1.2.3.4.5&halg=SHA256&ignorenonce=true

Subscribe to Notification event to get notified about the virtualized timestamping event. The EventID of the timestamping event is TimestampRequest. Inside the event handler, read the base16-encoded request from the EventParam parameter and forward it to the timestamping authority. Upon receiving the response, pass it back to the component, encoded in base16, via the TimestampResponse config property:

component.Config("TimestampResponse=308208ab...");

Note that all the exchange with your custom TSA should take place within the same invocation of the Notification event.

The hashonly parameter of the virtual URI tells the component to only return the timestamp message imprint via the EventParam parameter. If set to false, EventParam will contain the complete RFC3161 timestamping request.

The includecerts parameter specifies that the requestCertificates parameter of the timestamping request should be set to true.

The reqpolicy parameter lets you specify the request policy, and the halg parameter specifies the hash algorithm to use for timestamping.

The ignorenonce parameter allows you to switch off client nonce verification to enable compatibility with TSA services that do not support nonce mirroring.

All the parameters are optional.

TLSClientChain Property (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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.

AddFile Method (ASiCSigner Component)

Use this method to add a file to the archive.

Syntax

• C#
• VB.NET

public void AddFile();

Public Sub AddFile()

Remarks

This method allows you to add multiple files to the archive.

There are several ways in which you can provide files to ASiCSigner:

• Assign a file list to SourceFiles property.
• Assign the file name to SourceName, and the file body to SourceBytes or SourceStream.

If, however, you need to add more than one in-memory file, or add more than one bunch of files using SourceFiles, AddFile may be of good use. Effectively, it saves the file data provided through the above properties in ASiCSigner, releasing these properties for the next file(s). For example: signer.SourceName = "file1.txt"; signer.SourceBytes = Encoding.UTF8.GetBytes("Human progress is not measured by industry."); signer.AddFile(); // this saves the above data in the component, allowing you to add the next file signer.SourceName = "file2.txt"; signer.SourceBytes = Encoding.UTF8.GetBytes("It is measured by the value you place on a life."); signer.AddFile(); // this adds the second file signer.SourceName = "file3.txt"; signer.SourceBytes = Encoding.UTF8.GetBytes("An unimportant life. A life without privilege."); // You don't need to AddFile() the final file: this will be picked by ASiCSigner from the properties automatically

Close Method (ASiCSigner 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 (ASiCSigner 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.

CreateNew Method (ASiCSigner Component)

Creates a new ASiC container.

Syntax

• C#
• VB.NET

public void CreateNew();

Public Sub CreateNew()

Remarks

Use this method to create a new container file.

The container will be kept in memory until written down with Close method.

DoAction Method (ASiCSigner 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:

ExtractAsyncData Method (ASiCSigner Component)

Extracts user data from the DC signing service response.

Syntax

• C#
• VB.NET

public string ExtractAsyncData(string asyncReply);

Public Function ExtractAsyncData(ByVal AsyncReply As String) As String

Remarks

Call this method before finalizing the asynchronous signing process to extract the data passed to the ExternalCrypto.Data property on the pre-signing stage.

The Data parameter can be used to pass some state or document identifier along with the signing request from the pre-signing to the completion async stage.

ExtractFile Method (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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 (ASiCSigner 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.

Sign Method (ASiCSigner Component)

Signs the chosen files and packs them into an ASiC archive.

Syntax

• C#
• VB.NET

public void Sign();

Public Sub Sign()

Remarks

Use this method to create a new ASiC signature container in accordance with the component setup.

SignAsyncBegin Method (ASiCSigner Component)

Initiates the asynchronous signing operation.

Syntax

• C#
• VB.NET

public string SignAsyncBegin();

Public Function SignAsyncBegin() As String

Remarks

When using the DC framework, call this method to initiate the asynchronous signing process. Upon completion, a pre-signed copy of the document will be saved in OutputFile (or OutputStream). Keep the pre-signed copy somewhere local, and pass the returned string ('the request state') to the DC processor for handling.

Upon receiving the response state from the DC processor, assign the path to the pre-signed copy to InputFile (or InputStream), and call SignAsyncEnd to finalize the signing.

Note that depending on the signing method and DC configuration used, you may still need to provide the public part of the signing certificate via the SigningCertificate property.

Use the ExternalCrypto.AsyncDocumentID property to supply a unique document ID to include in the request. This is helpful when creating batches of multiple async requests, as it allows you to pass the whole response batch to SignAsyncEnd and expect it to recover the correct response from the batch automatically.

AsyncState is a message of the distributed cryptography (DC) protocol. The DC protocol is based on the exchange of async states between a DC client (an application that wants to sign a PDF, XML, or Office document) and a DC server (an application that controls access to the private key). An async state can carry one or more signing requests, comprised of document hashes, or one or more signatures produced over those hashes.

In a typical scenario you get a client-side async state from the SignAsyncBegin method. This state contains document hashes to be signed on the DC server side. You then send the async state to the DC server (often represented by the DCAuth component), which processes it and produces a matching signature state. The async state produced by the server is then passed to the SignAsyncEnd method.

SignAsyncEnd Method (ASiCSigner Component)

Completes the asynchronous signing operation.

Syntax

• C#
• VB.NET

public void SignAsyncEnd(string asyncReply);

Public Sub SignAsyncEnd(ByVal AsyncReply As String)

Remarks

When using the DC framework, call this method upon receiving the response state from the DC processor to complete the asynchronous signing process.

Before calling this method, assign the path to the pre-signed copy of the document obtained from the prior SignAsyncBegin call to InputFile (or InputStream). The method will embed the signature into the pre-signed document, and save the complete signed document to OutputFile (or OutputStream).

Note that depending on the signing method and DC configuration used, you may still need to provide the public part of the signing certificate via the SigningCertificate property.

Use the ExternalCrypto.AsyncDocumentID parameter to pass a specific document ID if using batched AsyncReply. If used, it should match the value provided on the pre-signing (SignAsyncBegin) stage.

AsyncState is a message of the distributed cryptography (DC) protocol. The DC protocol is based on the exchange of async states between a DC client (an application that wants to sign a PDF, XML, or Office document) and a DC server (an application that controls access to the private key). An async state can carry one or more signing requests, comprised of document hashes, or one or more signatures produced over those hashes.

In a typical scenario you get a client-side async state from the SignAsyncBegin method. This state contains document hashes to be signed on the DC server side. You then send the async state to the DC server (often represented by the DCAuth component), which processes it and produces a matching signature state. The async state produced by the server is then passed to the SignAsyncEnd method.

SignExternal Method (ASiCSigner Component)

Signs the document using an external signing facility.

Syntax

• C#
• VB.NET

public void SignExternal();

Public Sub SignExternal()

Remarks

Use this method to create an ASiC signature using an external signing facility for the cryptographic computations. SignExternal delegates the low-level signing operation to an external, remote, or custom signing engine. This method is useful if the signature has to be made by a device accessible through a custom or non-standard signing interface.

When all preparations are done and hash is computed, the component fires ExternalSign event which allows to pass the hash value for signing.

Timestamp Method (ASiCSigner Component)

Use this method to add timestamp.

Syntax

• C#
• VB.NET

public void Timestamp(string sigLabel, int timestampType);

Public Sub Timestamp(ByVal SigLabel As String, ByVal TimestampType As Integer)

Remarks

Call this method to timestamp the signature. Use the TimestampServer property to provide the address of the TSA (Time Stamping Authority) server which should be used for timestamping. Use the TimestampType parameter to specify the type of timestamp to create Available options:

Upgrade Method (ASiCSigner Component)

Upgrades existing CAdES or XAdES signature to a new level.

Syntax

• C#
• VB.NET

public void Upgrade(string sigLabel, int upgradeKind);

Public Sub Upgrade(ByVal SigLabel As String, ByVal UpgradeKind As Integer)

Remarks

CAdES and XAdES standard defines a number of different 'levels' or 'forms' of signatures which can be used for different purposes. Use this method to upgrade CAdES or XAdES signature to a new form or level specified by UpgradeKind. Signatures can normally be upgraded from less sophisticated levels (BES, EPES) to more sophisticated (T, XL, A).

The supported levels are:

ChainElementDownload Event (ASiCSigner 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, ASiCSignerChainElementDownloadEventArgs e);

public class ASiCSignerChainElementDownloadEventArgs : 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 ASiCSignerChainElementDownloadEventArgs)

Public Class ASiCSignerChainElementDownloadEventArgs 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 (ASiCSigner 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, ASiCSignerChainElementNeededEventArgs e);

public class ASiCSignerChainElementNeededEventArgs : 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 ASiCSignerChainElementNeededEventArgs)

Public Class ASiCSignerChainElementNeededEventArgs 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 (ASiCSigner 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, ASiCSignerChainElementStoreEventArgs e);

public class ASiCSignerChainElementStoreEventArgs : 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 ASiCSignerChainElementStoreEventArgs)

Public Class ASiCSignerChainElementStoreEventArgs 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 (ASiCSigner Component)

Reports the completion of a certificate chain validation.

Syntax

• C#
• VB.NET

public event OnChainValidatedHandler OnChainValidated;

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

public class ASiCSignerChainValidatedEventArgs : 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 ASiCSignerChainValidatedEventArgs)

Public Class ASiCSignerChainValidatedEventArgs 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 (ASiCSigner 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, ASiCSignerChainValidationProgressEventArgs e);

public class ASiCSignerChainValidationProgressEventArgs : 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 ASiCSignerChainValidationProgressEventArgs)

Public Class ASiCSignerChainValidationProgressEventArgs 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 (ASiCSigner 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, ASiCSignerContainerLoadedEventArgs e);

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

Public Event OnContainerLoaded As OnContainerLoadedHandler

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

Public Class ASiCSignerContainerLoadedEventArgs 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 (ASiCSigner Component)

Information about any errors that occur during signing or archiving.

Syntax

• C#
• VB.NET

public event OnErrorHandler OnError;

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

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

Public Event OnError As OnErrorHandler

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

Public Class ASiCSignerErrorEventArgs 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 which occur during signing or archiving of data.

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

ExternalSign Event (ASiCSigner Component)

Handles remote or external signing initiated by the SignExternal method or other source.

Syntax

• C#
• VB.NET

public event OnExternalSignHandler OnExternalSign;

public delegate void OnExternalSignHandler(object sender, ASiCSignerExternalSignEventArgs e);

public class ASiCSignerExternalSignEventArgs : EventArgs {
  public string OperationId { get; }
  public string HashAlgorithm { get; }
  public string Pars { get; }
  public string Data { get; }
  public string SignedData { get; set; }
}

Public Event OnExternalSign As OnExternalSignHandler

Public Delegate Sub OnExternalSignHandler(sender As Object, e As ASiCSignerExternalSignEventArgs)

Public Class ASiCSignerExternalSignEventArgs Inherits EventArgs
  Public ReadOnly Property OperationId As String
  Public ReadOnly Property HashAlgorithm As String
  Public ReadOnly Property Pars As String
  Public ReadOnly Property Data As String
  Public Property SignedData As String
End Class

Remarks

Assign a handler to this event if you need to delegate a low-level signing operation to an external, remote, or custom signing engine. Depending on the settings, the handler will receive a hashed or unhashed value to be signed.

The event handler must pass the value of Data to the signer, obtain the signature, and pass it back to the component via the SignedData parameter.

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

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

A sample MD5 hash encoded in base16: a0dee2a0382afbb09120ffa7ccd8a152 - lower case base16 A0DEE2A0382AFBB09120FFA7CCD8A152 - upper case base16

A sample event handler that uses the .NET RSACryptoServiceProvider class may look like the following: signer.OnExternalSign += (s, e) => { var cert = new X509Certificate2("cert.pfx", "", X509KeyStorageFlags.Exportable); var key = (RSACryptoServiceProvider)cert.PrivateKey; var dataToSign = e.Data.FromBase16String(); var signedData = key.SignHash(dataToSign, "2.16.840.1.101.3.4.2.1"); e.SignedData = signedData.ToBase16String(); };

FileExtractionStart Event (ASiCSigner Component)

Signifies the start of a file extraction process.

Syntax

• C#
• VB.NET

public event OnFileExtractionStartHandler OnFileExtractionStart;

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

public class ASiCSignerFileExtractionStartEventArgs : 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 ASiCSignerFileExtractionStartEventArgs)

Public Class ASiCSignerFileExtractionStartEventArgs 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 (ASiCSigner 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, ASiCSignerNotificationEventArgs e);

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

Public Event OnNotification As OnNotificationHandler

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

Public Class ASiCSignerNotificationEventArgs 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 (ASiCSigner Component)

Signifies the start of signature validation.

Syntax

• C#
• VB.NET

public event OnSignatureFoundHandler OnSignatureFound;

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

public class ASiCSignerSignatureFoundEventArgs : 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 ASiCSignerSignatureFoundEventArgs)

Public Class ASiCSignerSignatureFoundEventArgs 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 (ASiCSigner Component)

Marks the completion of the signature validation routine.

Syntax

• C#
• VB.NET

public event OnSignatureValidatedHandler OnSignatureValidated;

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

public class ASiCSignerSignatureValidatedEventArgs : 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 ASiCSignerSignatureValidatedEventArgs)

Public Class ASiCSignerSignatureValidatedEventArgs 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 (ASiCSigner Component)

Signifies the start of a timestamp validation routine.

Syntax

• C#
• VB.NET

public event OnTimestampFoundHandler OnTimestampFound;

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

public class ASiCSignerTimestampFoundEventArgs : 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 ASiCSignerTimestampFoundEventArgs)

Public Class ASiCSignerTimestampFoundEventArgs 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.

TimestampRequest Event (ASiCSigner Component)

Fires when the component is ready to request a timestamp from an external TSA.

Syntax

• C#
• VB.NET

public event OnTimestampRequestHandler OnTimestampRequest;

public delegate void OnTimestampRequestHandler(object sender, ASiCSignerTimestampRequestEventArgs e);

public class ASiCSignerTimestampRequestEventArgs : EventArgs {
  public string TSA { get; }
  public string TimestampRequest { get; }
  public string TimestampResponse { get; set; }
  public bool SuppressDefault { get; set; }
}

Public Event OnTimestampRequest As OnTimestampRequestHandler

Public Delegate Sub OnTimestampRequestHandler(sender As Object, e As ASiCSignerTimestampRequestEventArgs)

Public Class ASiCSignerTimestampRequestEventArgs Inherits EventArgs
  Public ReadOnly Property TSA As String
  Public ReadOnly Property TimestampRequest As String
  Public Property TimestampResponse As String
  Public Property SuppressDefault As Boolean
End Class

Remarks

Subscribe to this event to intercept timestamp requests. You can use it to override timestamping requests and perform them in your code.

The TSA parameter indicates the timestamping service being used. It matches the value passed to the TimestampServer property. Set the SuppressDefault parameter to false if you would like to stop the built-in TSA request from going ahead. The built-in TSA request is also not performed if the returned TimestampResponse parameter is not empty.

TimestampValidated Event (ASiCSigner Component)

Reports the completion of the timestamp validation routine.

Syntax

• C#
• VB.NET

public event OnTimestampValidatedHandler OnTimestampValidated;

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

public class ASiCSignerTimestampValidatedEventArgs : 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 ASiCSignerTimestampValidatedEventArgs)

Public Class ASiCSignerTimestampValidatedEventArgs 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 (ASiCSigner 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, ASiCSignerTLSCertNeededEventArgs e);

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

Public Event OnTLSCertNeeded As OnTLSCertNeededHandler

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

Public Class ASiCSignerTLSCertNeededEventArgs 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 (ASiCSigner 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, ASiCSignerTLSCertValidateEventArgs e);

public class ASiCSignerTLSCertValidateEventArgs : 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 ASiCSignerTLSCertValidateEventArgs)

Public Class ASiCSignerTLSCertValidateEventArgs 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 (ASiCSigner Component)

Fires when a TLS handshake with Host successfully completes.

Syntax

• C#
• VB.NET

public event OnTLSEstablishedHandler OnTLSEstablished;

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

public class ASiCSignerTLSEstablishedEventArgs : 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 ASiCSignerTLSEstablishedEventArgs)

Public Class ASiCSignerTLSEstablishedEventArgs 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 (ASiCSigner 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, ASiCSignerTLSHandshakeEventArgs e);

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

Public Event OnTLSHandshake As OnTLSHandshakeHandler

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

Public Class ASiCSignerTLSHandshakeEventArgs 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 (ASiCSigner Component)

Reports the graceful closure of a TLS connection.

Syntax

• C#
• VB.NET

public event OnTLSShutdownHandler OnTLSShutdown;

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

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

Public Event OnTLSShutdown As OnTLSShutdownHandler

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

Public Class ASiCSignerTLSShutdownEventArgs 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