ASiCSigner Class

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The ASiCSigner class creates signature containers.

Syntax

secureblackbox.ASiCSigner

Remarks

ASiCSigner provides functionality for creating Associated Signature Containers. ASiC containers are used to bind together signed objects and electronic signatures or timestamps.

ASiCSigner supports both ASiC-S (simple) and ASiC-E (extended) signature profiles, as well as the three types of signatures (CAdES, XAdES, and timestamps). 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

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

Method List

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

Event List

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

Config Settings

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

AutoValidateSignatures Property (ASiCSigner Class)

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

Syntax

public boolean isAutoValidateSignatures();


public void setAutoValidateSignatures(boolean autoValidateSignatures);

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 Class)

The certificates that must be rejected as trust anchors.

Syntax

public CertificateList getBlockedCertificates();


public void setBlockedCertificates(CertificateList blockedCertificates);

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.

Please refer to the Certificate type for a complete list of fields.

Certificates Property (ASiCSigner Class)

A collection of certificates included in the electronic signature.

Syntax

public CertificateList getCertificates();

Remarks

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

This collection is indexed from 0 to size -1.

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

Please refer to the Certificate type for a complete list of fields.

CheckTrustedLists Property (ASiCSigner Class)

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

Syntax

public boolean isCheckTrustedLists();


public void setCheckTrustedLists(boolean checkTrustedLists);

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 Class)

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

Syntax

public CRLList getCRLs();

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.

Please refer to the CRL type for a complete list of fields.

Extended Property (ASiCSigner Class)

Specifies the type of ASiC signature.

Syntax

public boolean isExtended();


public void setExtended(boolean extended);

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 Class)

Provides access to external signing and DC parameters.

Syntax

public ExternalCrypto getExternalCrypto();

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.

Please refer to the ExternalCrypto type for a complete list of fields.

Files Property (ASiCSigner Class)

Lists all files contained in the container.

Syntax

public ArchivedFileList getFiles();

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.

Please refer to the ArchivedFile type for a complete list of fields.

FIPSMode Property (ASiCSigner Class)

Reserved.

Syntax

public boolean isFIPSMode();


public void setFIPSMode(boolean FIPSMode);

Default Value

False

Remarks

This property is reserved for future use.

IgnoreChainValidationErrors Property (ASiCSigner Class)

Makes the class tolerant to chain validation errors.

Syntax

public boolean isIgnoreChainValidationErrors();


public void setIgnoreChainValidationErrors(boolean ignoreChainValidationErrors);

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 Class)

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

Syntax

public byte[] getInputBytes();


public void setInputBytes(byte[] inputBytes);

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 Class)

A path to the ASiC container to process.

Syntax

public String getInputFile();


public void setInputFile(String inputFile);

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 Class)

A stream containing ASiC data.

Syntax

public java.io.InputStream getInputStream();


public void setInputStream(java.io.InputStream inputStream);

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 Class)

Additional certificates for chain validation.

Syntax

public CertificateList getKnownCertificates();


public void setKnownCertificates(CertificateList knownCertificates);

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 class 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.

Please refer to the Certificate type for a complete list of fields.

KnownCRLs Property (ASiCSigner Class)

Additional CRLs for chain validation.

Syntax

public CRLList getKnownCRLs();


public void setKnownCRLs(CRLList knownCRLs);

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.

Please refer to the CRL type for a complete list of fields.

KnownOCSPs Property (ASiCSigner Class)

Additional OCSP responses for chain validation.

Syntax

public OCSPResponseList getKnownOCSPs();


public void setKnownOCSPs(OCSPResponseList knownOCSPs);

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.

Please refer to the OCSPResponse type for a complete list of fields.

NewSignature Property (ASiCSigner Class)

Provides access to new signature properties.

Syntax

public ASiCSignature getNewSignature();

Remarks

Use this property to tune-up signature properties.

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

Please refer to the ASiCSignature type for a complete list of fields.

OCSPs Property (ASiCSigner Class)

A collection of OCSP responses embedded into the signature.

Syntax

public OCSPResponseList getOCSPs();

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.

Please refer to the OCSPResponse type for a complete list of fields.

OfflineMode Property (ASiCSigner Class)

Switches the class to offline mode.

Syntax

public boolean isOfflineMode();


public void setOfflineMode(boolean offlineMode);

Default Value

False

Remarks

When working in offline mode, the class 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 Class)

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

Syntax

public byte[] getOutputBytes();

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 Class)

The file where the signed data will be saved.

Syntax

public String getOutputFile();


public void setOutputFile(String outputFile);

Default Value

""

Remarks

Provides a path to the file where the class 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 Class)

A local path to extract the files to.

Syntax

public String getOutputPath();


public void setOutputPath(String outputPath);

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 Class)

The stream where the container will be saved.

Syntax

public java.io.OutputStream getOutputStream();


public void setOutputStream(java.io.OutputStream outputStream);

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 Class)

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

Syntax

public String getProfile();


public void setProfile(String profile);

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 Class)

The proxy server settings.

Syntax

public ProxySettings getProxy();

Remarks

Use this property to tune up the proxy server settings.

This property is read-only.

Please refer to the ProxySettings type for a complete list of fields.

RevocationCheck Property (ASiCSigner Class)

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

Syntax

public int getRevocationCheck();


public void setRevocationCheck(int revocationCheck);


Enumerated values:
  public final static int crcNone = 0;
  public final static int crcAuto = 1;
  public final static int crcAllCRL = 2;
  public final static int crcAllOCSP = 3;
  public final static int crcAllCRLAndOCSP = 4;
  public final static int crcAnyCRL = 5;
  public final static int crcAnyOCSP = 6;
  public final static int crcAnyCRLOrOCSP = 7;
  public final static int crcAnyOCSPOrCRL = 8;

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 Class)

Contains the list of signatures included in the ASiC container.

Syntax

public ASiCSignatureList getSignatures();

Remarks

Use this property to access all signatures in the container.

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

Please refer to the ASiCSignature type for a complete list of fields.

SigningCertificate Property (ASiCSigner Class)

The certificate to be used for signing.

Syntax

public Certificate getSigningCertificate();


public void setSigningCertificate(Certificate signingCertificate);

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.

Please refer to the Certificate type for a complete list of fields.

SigningChain Property (ASiCSigner Class)

The signing certificate chain.

Syntax

public CertificateList getSigningChain();


public void setSigningChain(CertificateList signingChain);

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.

Please refer to the Certificate type for a complete list of fields.

SocketSettings Property (ASiCSigner Class)

Manages network connection settings.

Syntax

public SocketSettings getSocketSettings();

Remarks

Use this property to tune up network connection parameters.

This property is read-only.

Please refer to the SocketSettings type for a complete list of fields.

SourceBytes Property (ASiCSigner Class)

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

Syntax

public byte[] getSourceBytes();


public void setSourceBytes(byte[] sourceBytes);

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 Class)

The files to be packed into the container.

Syntax

public String getSourceFiles();


public void setSourceFiles(String sourceFiles);

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 Class)

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

Syntax

public String getSourceName();


public void setSourceName(String sourceName);

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 Class)

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

Syntax

public java.io.InputStream getSourceStream();


public void setSourceStream(java.io.InputStream sourceStream);

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 Class)

Contains a collection of timestamps for the processed document.

Syntax

public TimestampInfoList getTimestamps();

Remarks

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

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

Please refer to the TimestampInfo type for a complete list of fields.

TimestampServer Property (ASiCSigner Class)

The address of the timestamping server.

Syntax

public String getTimestampServer();


public void setTimestampServer(String timestampServer);

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 Class)

The TLS client certificate chain.

Syntax

public CertificateList getTLSClientChain();


public void setTLSClientChain(CertificateList TLSClientChain);

Remarks

Assign a certificate chain to this property to enable TLS client authentication in the class. 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.

Please refer to the Certificate type for a complete list of fields.

TLSServerChain Property (ASiCSigner Class)

The TLS server's certificate chain.

Syntax

public CertificateList getTLSServerChain();

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.

Please refer to the Certificate type for a complete list of fields.

TLSSettings Property (ASiCSigner Class)

Manages TLS layer settings.

Syntax

public TLSSettings getTLSSettings();

Remarks

Use this property to tune up the TLS layer parameters.

This property is read-only.

Please refer to the TLSSettings type for a complete list of fields.

TrustedCertificates Property (ASiCSigner Class)

A list of trusted certificates for chain validation.

Syntax

public CertificateList getTrustedCertificates();


public void setTrustedCertificates(CertificateList trustedCertificates);

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.

Please refer to the Certificate type for a complete list of fields.

ValidationMoment Property (ASiCSigner Class)

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

Syntax

public String getValidationMoment();


public void setValidationMoment(String validationMoment);

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 Class)

Use this method to add a file to the archive.

Syntax

public void 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.

All files assigned to the above properties will be added to the archive automatically: you don't need to call AddFile to add them.

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 Class)

Closes an opened container.

Syntax

public void close(boolean saveChanges);

Remarks

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

Config Method (ASiCSigner Class)

Sets or retrieves a configuration setting.

Syntax

public String config(String configurationString);

Remarks

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

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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 Class)

Creates a new ASiC container.

Syntax

public void 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 Class)

Performs an additional action.

Syntax

public String doAction(String actionID, String actionParams);

Remarks

DoAction is a generic method available in every class. 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;....

ExtractAsyncData Method (ASiCSigner Class)

Extracts user data from the DC signing service response.

Syntax

public String extractAsyncData(String asyncReply);

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 Class)

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

Syntax

public void extractFile(String fileName);

Remarks

Use this method to extract a single archived

ExtractFiles Method (ASiCSigner Class)

Extracts files covered by a signature to OutputPath .

Syntax

public void extractFiles(String sigLabel);

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 Class)

Opens an existing container for signing or updating.

Syntax

public void 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 Class)

Resets the class settings.

Syntax

public void reset();

Remarks

Reset is a generic method available in every class.

Revalidate Method (ASiCSigner Class)

Revalidates a signature in accordance with current settings.

Syntax

public void revalidate(String sigLabel);

Remarks

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

SelectInfo Method (ASiCSigner Class)

Select signature information for a specific entity.

Syntax

public void selectInfo(String entityLabel, int infoType, boolean clearSelection);

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 Class)

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

Syntax

public void sign();

Remarks

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

SignAsyncBegin Method (ASiCSigner Class)

Initiates the asynchronous signing operation.

Syntax

public String signAsyncBegin();

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 class), 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 Class)

Completes the asynchronous signing operation.

Syntax

public void signAsyncEnd(String asyncReply);

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 class), 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 Class)

Signs the document using an external signing facility.

Syntax

public void 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 class fires ExternalSign event which allows to pass the hash value for signing.

Timestamp Method (ASiCSigner Class)

Use this method to add timestamp.

Syntax

public void timestamp(String sigLabel, int timestampType);

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 Class)

Upgrades existing CAdES or XAdES signature to a new level.

Syntax

public void upgrade(String sigLabel, int upgradeKind);

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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void chainElementDownload(ASiCSignerChainElementDownloadEvent e) {}
  ...
}

public class ASiCSignerChainElementDownloadEvent {
  public int kind;
  public String certRDN;
  public String CACertRDN;
  public String location;
  public int action; //read-write
}

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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void chainElementNeeded(ASiCSignerChainElementNeededEvent e) {}
  ...
}

public class ASiCSignerChainElementNeededEvent {
  public int kind;
  public String certRDN;
  public String CACertRDN;
}

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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void chainElementStore(ASiCSignerChainElementStoreEvent e) {}
  ...
}

public class ASiCSignerChainElementStoreEvent {
  public int kind;
  public byte[] body;
  public String URI; //read-write
}

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 Class)

Reports the completion of a certificate chain validation.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void chainValidated(ASiCSignerChainValidatedEvent e) {}
  ...
}

public class ASiCSignerChainValidatedEvent {
  public int index;
  public String entityLabel;
  public String subjectRDN;
  public int validationResult;
  public int validationDetails;
  public boolean cancel; //read-write
}

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.

Any other value reports a failure, and ValidationDetails provides more details on its reasons.

ChainValidationProgress Event (ASiCSigner Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void chainValidationProgress(ASiCSignerChainValidationProgressEvent e) {}
  ...
}

public class ASiCSignerChainValidationProgressEvent {
  public String eventKind;
  public String certRDN;
  public String CACertRDN;
  public int action; //read-write
}

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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void containerLoaded(ASiCSignerContainerLoadedEvent e) {}
  ...
}

public class ASiCSignerContainerLoadedEvent {
  public boolean cancel; //read-write
}

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 Class)

Information about any errors that occur during signing or archiving.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void error(ASiCSignerErrorEvent e) {}
  ...
}

public class ASiCSignerErrorEvent {
  public int errorCode;
  public String description;
}

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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void externalSign(ASiCSignerExternalSignEvent e) {}
  ...
}

public class ASiCSignerExternalSignEvent {
  public String operationId;
  public String hashAlgorithm;
  public String pars;
  public String data;
  public String signedData; //read-write
}

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 class via the SignedData parameter.

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

The class 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 Class)

Signifies the start of a file extraction process.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void fileExtractionStart(ASiCSignerFileExtractionStartEvent e) {}
  ...
}

public class ASiCSignerFileExtractionStartEvent {
  public String fileName;
  public long fileSize;
  public String modDate;
  public boolean extract; //read-write
  public String destFile; //read-write
}

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 class will overwrite it. To prevent overwriting of existing files, subscribe to this event, and change DestFile when needed.

Notification Event (ASiCSigner Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void notification(ASiCSignerNotificationEvent e) {}
  ...
}

public class ASiCSignerNotificationEvent {
  public String eventID;
  public String eventParam;
}

Remarks

The class fires this event to let the application know about some event, occurrence, or milestone in the class. 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 class, the exact action it is performing, or the document being processed, one or both may be omitted.

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

SignatureFound Event (ASiCSigner Class)

Signifies the start of signature validation.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void signatureFound(ASiCSignerSignatureFoundEvent e) {}
  ...
}

public class ASiCSignerSignatureFoundEvent {
  public int index;
  public String entityLabel;
  public String issuerRDN;
  public byte[] serialNumber;
  public byte[] subjectKeyID;
  public boolean certFound;
  public boolean validateSignature; //read-write
  public boolean validateChain; //read-write
}

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 class 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 Class)

Marks the completion of the signature validation routine.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void signatureValidated(ASiCSignerSignatureValidatedEvent e) {}
  ...
}

public class ASiCSignerSignatureValidatedEvent {
  public int index;
  public String entityLabel;
  public String issuerRDN;
  public byte[] serialNumber;
  public byte[] subjectKeyID;
  public int validationResult;
  public boolean cancel; //read-write
}

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 Class)

Signifies the start of a timestamp validation routine.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void timestampFound(ASiCSignerTimestampFoundEvent e) {}
  ...
}

public class ASiCSignerTimestampFoundEvent {
  public int index;
  public String entityLabel;
  public String issuerRDN;
  public byte[] serialNumber;
  public byte[] subjectKeyID;
  public boolean certFound;
  public boolean validateTimestamp; //read-write
  public boolean validateChain; //read-write
}

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 class 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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void timestampRequest(ASiCSignerTimestampRequestEvent e) {}
  ...
}

public class ASiCSignerTimestampRequestEvent {
  public String TSA;
  public String timestampRequest;
  public String timestampResponse; //read-write
  public boolean suppressDefault; //read-write
}

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 Class)

Reports the completion of the timestamp validation routine.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void timestampValidated(ASiCSignerTimestampValidatedEvent e) {}
  ...
}

public class ASiCSignerTimestampValidatedEvent {
  public int index;
  public String entityLabel;
  public String issuerRDN;
  public byte[] serialNumber;
  public byte[] subjectKeyID;
  public String time;
  public int validationResult;
  public int chainValidationResult;
  public int chainValidationDetails;
  public boolean cancel; //read-write
}

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 Class)

Fires when a remote TLS party requests a client certificate.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void TLSCertNeeded(ASiCSignerTLSCertNeededEvent e) {}
  ...
}

public class ASiCSignerTLSCertNeededEvent {
  public String host;
  public String CANames;
}

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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void TLSCertValidate(ASiCSignerTLSCertValidateEvent e) {}
  ...
}

public class ASiCSignerTLSCertValidateEvent {
  public String serverHost;
  public String serverIP;
  public boolean accept; //read-write
}

Remarks

This event is fired during a TLS handshake. Use the TLSServerChain property to access the certificate chain. In general, classes 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 class, and can be adjusted if needed.

TLSEstablished Event (ASiCSigner Class)

Fires when a TLS handshake with Host successfully completes.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void TLSEstablished(ASiCSignerTLSEstablishedEvent e) {}
  ...
}

public class ASiCSignerTLSEstablishedEvent {
  public String host;
  public String version;
  public String ciphersuite;
  public byte[] connectionId;
  public boolean abort; //read-write
}

Remarks

The class 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 Class)

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

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void TLSHandshake(ASiCSignerTLSHandshakeEvent e) {}
  ...
}

public class ASiCSignerTLSHandshakeEvent {
  public String host;
  public boolean abort; //read-write
}

Remarks

The class 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 Class)

Reports the graceful closure of a TLS connection.

Syntax

public class DefaultASiCSignerEventListener implements ASiCSignerEventListener {
  ...
  public void TLSShutdown(ASiCSignerTLSShutdownEvent e) {}
  ...
}

public class ASiCSignerTLSShutdownEvent {
  public String host;
}

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

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

public ASiCSignature();

Certificate Type

Encapsulates an individual X.509 certificate.

Remarks

This type keeps and provides access to X.509 certificate details.

Fields

Constructors

public Certificate( bytes,  startIndex,  count,  password);

public Certificate( certBytes,  certStartIndex,  certCount,  keyBytes,  keyStartIndex,  keyCount,  password);

public Certificate( bytes,  startIndex,  count);

public Certificate( path,  password);

public Certificate( certPath,  keyPath,  password);

public Certificate( path);

public Certificate( stream);

public Certificate( stream,  password);

public Certificate( certStream,  keyStream,  password);

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

public CRL( bytes,  startIndex,  count);

public CRL( location);

public CRL( stream);

public CRL();

ExternalCrypto Type

Specifies the parameters of external cryptographic calls.

Remarks

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

Fields

Constructors

public ExternalCrypto();

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

public OCSPResponse( bytes,  startIndex,  count);

public OCSPResponse( location);

public OCSPResponse( stream);

public OCSPResponse();

ProxySettings Type

A container for proxy server settings.

Remarks

This type exposes a collection of properties for tuning up the proxy server configuration.

Fields

Constructors

public ProxySettings();

SocketSettings Type

A container for the socket settings.

Remarks

This type is a container for socket-layer parameters.

Fields

Constructors

public SocketSettings();

TimestampInfo Type

A container for timestamp information.

Remarks

The TimestampInfo object contains details of a third-party timestamp and the outcome of its validation.

Fields

Constructors

public TimestampInfo();

TLSSettings Type

A container for TLS connection settings.

Remarks

The TLS (Transport Layer Security) protocol provides security for information exchanged over insecure connections such as TCP/IP.

Fields

Constructors

public TLSSettings();

Config Settings (ASiCSigner Class)

The class accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.

ASiCSigner Config Settings

Base Config Settings

Trappable Errors (ASiCSigner Class)

ASiCSigner Errors