Package eu.europa.esig.dss.spi.validation.analyzer

Class DefaultDocumentAnalyzer

java.lang.Object

eu.europa.esig.dss.spi.validation.analyzer.DefaultDocumentAnalyzer

All Implemented Interfaces:

DocumentAnalyzer

Direct Known Subclasses:

AbstractASiCContainerAnalyzer, AbstractJWSDocumentAnalyzer, CMSDocumentAnalyzer, DefaultEvidenceRecordAnalyzer, DetachedTimestampAnalyzer, PDFDocumentAnalyzer, XMLDocumentAnalyzer

public abstract class DefaultDocumentAnalyzer
extends Object
implements DocumentAnalyzer

This class contains a common code for processing of signed documents

Field Summary

Fields

Modifier and Type	Field	Description
protected CertificateVerifier	certificateVerifier	The reference to the certificate verifier.
protected List<DSSDocument>	containerContents	In case of an ASiC signature this List of container documents.
protected List<DSSDocument>	detachedContents	In case of a detached signature this List contains the signed documents.
protected List<DSSDocument>	detachedEvidenceRecordDocuments	Contains a list of evidence record documents detached from the signature
protected DSSDocument	document	The document to be validated (with the signature(s) or timestamp(s))
protected ManifestFile	manifestFile	A related ManifestFile to the provided document
protected CertificateSource	signingCertificateSource	Certificate source to find signing certificate

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DefaultDocumentAnalyzer()	The default constructor

Method Summary

Modifier and Type	Method	Description
protected boolean	addReference(SignatureScope signatureScope)	Checks if the signature scope shall be added as a timestamped reference NOTE: used to avoid duplicates in ASiC with CAdES validator, due to covered signature/timestamp files
protected void	appendCounterSignatures(List<AdvancedSignature> allSignatureList, AdvancedSignature signature)	The util method to link counter signatures with the related master signatures
protected void	appendExternalEvidenceRecords(TimestampToken timestampToken)	Appends the detached evidence records covering the time-stamp
protected void	appendExternalEvidenceRecords(List<AdvancedSignature> allSignatureList)	Appends detached evidence record provided to the validator to the corresponding signatures covering by the evidence record document
protected List<EvidenceRecord>	buildDetachedEvidenceRecords()	Builds a list of detached EvidenceRecords extracted from the document
protected List<TimestampToken>	buildDetachedTimestamps()	Builds a list of detached TimestampTokens extracted from the document
protected EvidenceRecord	buildEvidenceRecord(DSSDocument evidenceRecordDocument)	Builds an evidence record from the given DSSDocument
protected List<AdvancedSignature>	buildSignatures()	This method build a list of signatures to be extracted from a document
protected boolean	coversSignature(AdvancedSignature signature, EvidenceRecord evidenceRecord)	Verifies whether an evidenceRecord covers the signature
protected ValidationContext	createValidationContext()	This method creates a new instance of ValidationContext performing preparation of validation data, certificate chain building, revocation request, as well as custom validation checks execution.
static DocumentAnalyzer	fromDocument(DSSDocument dssDocument)	This method guesses the document format and returns an appropriate document reader.
protected List<EvidenceRecord>	getAllEvidenceRecords(List<AdvancedSignature> signatures, List<EvidenceRecord> detachedEvidenceRecords)	Returns a list of all found evidence records (embedded and detached)
protected List<AdvancedSignature>	getAllSignatures()	Returns a list of all signatures from the validating document
List<EvidenceRecord>	getDetachedEvidenceRecords()	Retrieves the detached evidence records found in the document
List<TimestampToken>	getDetachedTimestamps()	Retrieves the detached timestamps found in the document
DSSDocument	getDocument()	Gets document to be validated
protected EvidenceRecord	getEvidenceRecord(EvidenceRecordAnalyzer evidenceRecordReader)	Gets an evidence record from a evidenceRecordReader
protected List<SignatureScope>	getEvidenceRecordScopes(EvidenceRecord evidenceRecord)	Finds evidence record scopes
List<DSSDocument>	getOriginalDocuments(String signatureId)	This method returns the signed document(s) without their signature(s)
AdvancedSignature	getSignatureById(String signatureId)	Returns the signature with the given id.
protected SignaturePolicyProvider	getSignaturePolicyProvider()	Returns a signaturePolicyProvider If not defined, returns a default provider
SignaturePolicyValidatorLoader	getSignaturePolicyValidatorLoader()	Returns an instance of a corresponding to the format SignaturePolicyValidatorLoader
List<AdvancedSignature>	getSignatures()	Retrieves the signatures found in the document
protected List<TimestampedReference>	getTimestampedReferences(List<SignatureScope> signatureScopes)	Returns a list of timestamped references from the given list of SignatureScopes
protected List<TimestampAnalyzer>	getTimestampReaders()	Returns a list of timestamp validators for timestamps embedded into the container
TokenIdentifierProvider	getTokenIdentifierProvider()	Gets TokenIdentifierProvider
<T extends AdvancedSignature> ValidationDataContainer	getValidationData(Collection<T> signatures)	Extracts a validation data for provided collection of signatures
<T extends AdvancedSignature> ValidationDataContainer	getValidationData(Collection<T> signatures, Collection<TimestampToken> detachedTimestamps)	Extracts a validation data for provided collection of signatures and/or timestamps
Date	getValidationTime()	Returns validation time In case if the validation time is not provided, initialize the current time value from the system
protected ValidationDataContainer	instantiateValidationDataContainer()	Creates a new instance of ValidationDataContainer
protected boolean	isTimestampCoveredByEvidenceRecord(TimestampToken timestampToken, EvidenceRecord evidenceRecord)	Checks whether the timestampToken is covered by the given evidenceRecord
protected void	prepareDetachedEvidenceRecordValidationContext(ValidationContext validationContext, Collection<EvidenceRecord> evidenceRecords)	Prepares the validationContext for the evidence record validation process
protected void	prepareDetachedTimestampValidationContext(ValidationContext validationContext, Collection<TimestampToken> timestamps)	Prepares the validationContext for a timestamp validation process
protected <T extends AdvancedSignature> void	prepareSignatureForVerification(ValidationContext validationContext, Collection<T> allSignatureList)	This method prepares a SignatureValidationContext for signatures validation
protected <T extends AdvancedSignature> void	prepareSignatureValidationContext(ValidationContext validationContext, Collection<T> allSignatures)	Prepares the validationContext for signature validation process
protected <T extends AdvancedSignature> ValidationContext	prepareValidationContext(Collection<T> signatures, Collection<TimestampToken> detachedTimestamps, Collection<EvidenceRecord> detachedEvidenceRecords, CertificateVerifier certificateVerifier)	Initializes and fills ValidationContext with necessary data sources
protected <T extends AdvancedSignature> void	processSignaturesValidation(Collection<T> allSignatureList)	Performs cryptographic validation of the signatures
void	setCertificateVerifier(CertificateVerifier certificateVerifier)	To carry out the validation process of the signature(s) some external sources of certificates and of revocation data can be needed.
void	setContainerContents(List<DSSDocument> containerContents)	Sets the List of DSSDocument containing the original container content for ASiC-S signatures.
void	setDetachedContents(List<DSSDocument> detachedContents)	Sets the List of DSSDocument containing the original contents to sign, for detached signature scenarios.
void	setDetachedEvidenceRecordDocuments(List<DSSDocument> detachedEvidenceRecordDocuments)	Sets a List of DSSDocument containing the evidence record documents covering the signature document.
void	setDetachedEvidenceRecords(List<EvidenceRecord> evidenceRecords)	Sets a list of detached evidence records
void	setManifestFile(ManifestFile manifestFile)	Sets a related ManifestFile to the document to be validated.
void	setSignaturePolicyProvider(SignaturePolicyProvider signaturePolicyProvider)	This method allows to set a provider for Signature policies
void	setSigningCertificateSource(CertificateSource signingCertificateSource)	Set a certificate source which allows to find the signing certificate by kid or certificate's digest
void	setTokenIdentifierProvider(TokenIdentifierProvider tokenIdentifierProvider)	Sets the TokenIdentifierProvider
void	setValidationContextExecutor(ValidationContextExecutor validationContextExecutor)	This method sets ValidationContextExecutor for validation of the prepared ValidationContext Default: eu.europa.esig.dss.validation.executor.context.DefaultValidationContextExecutor (performs basic validation of tokens, including certificate chain building and revocation data extraction, without processing of validity checks)
void	setValidationTime(Date validationTime)	Allows to define a custom validation time
ValidationContext	validate()	This method performs validation of the document
protected void	validateContext(ValidationContext validationContext)	Process the validation
protected void	validateSignaturePolicy(AdvancedSignature signature)	This method is used to perform validation of the signature policy's identifier, when present

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface eu.europa.esig.dss.spi.validation.analyzer.DocumentAnalyzer

getOriginalDocuments, isSupported

Field Details

document

protected DSSDocument document

The document to be validated (with the signature(s) or timestamp(s))

detachedContents

protected List<DSSDocument> detachedContents

In case of a detached signature this List contains the signed documents.

detachedEvidenceRecordDocuments

protected List<DSSDocument> detachedEvidenceRecordDocuments

Contains a list of evidence record documents detached from the signature

containerContents

protected List<DSSDocument> containerContents

In case of an ASiC signature this List of container documents.

manifestFile

protected ManifestFile manifestFile

A related ManifestFile to the provided document

signingCertificateSource

protected CertificateSource signingCertificateSource

Certificate source to find signing certificate

certificateVerifier

protected CertificateVerifier certificateVerifier

The reference to the certificate verifier. The current DSS implementation proposes CommonCertificateVerifier. This verifier encapsulates the references to different sources used in the signature validation process.

Constructor Details

DefaultDocumentAnalyzer

protected DefaultDocumentAnalyzer()

The default constructor

Method Details

fromDocument

public static DocumentAnalyzer fromDocument(DSSDocument dssDocument)

This method guesses the document format and returns an appropriate document reader.

Parameters:

dssDocument - The instance of DSSDocument to validate

Returns:

returns the specific instance of DocumentReader in terms of the document type

getDocument

public DSSDocument getDocument()

Description copied from interface: DocumentAnalyzer

Gets document to be validated

Specified by:

getDocument in interface DocumentAnalyzer

Returns:

DSSDocument

setSigningCertificateSource

public void setSigningCertificateSource(CertificateSource signingCertificateSource)

Description copied from interface: DocumentAnalyzer

Set a certificate source which allows to find the signing certificate by kid or certificate's digest

Specified by:

setSigningCertificateSource in interface DocumentAnalyzer

Parameters:

signingCertificateSource - the certificate source

setCertificateVerifier

public void setCertificateVerifier(CertificateVerifier certificateVerifier)

To carry out the validation process of the signature(s) some external sources of certificates and of revocation data can be needed. The certificate verifier is used to pass these values. Note that once this setter is called any change in the content of the CommonTrustedCertificateSource or in adjunct certificate source is not taken into account.

Specified by:

setCertificateVerifier in interface DocumentAnalyzer

Parameters:

certificateVerifier - CertificateVerifier

setValidationContextExecutor

public void setValidationContextExecutor(ValidationContextExecutor validationContextExecutor)

Description copied from interface: DocumentAnalyzer

This method sets ValidationContextExecutor for validation of the prepared ValidationContext Default: eu.europa.esig.dss.validation.executor.context.DefaultValidationContextExecutor (performs basic validation of tokens, including certificate chain building and revocation data extraction, without processing of validity checks)

Specified by:

setValidationContextExecutor in interface DocumentAnalyzer

Parameters:

validationContextExecutor - ValidationContextExecutor

getTokenIdentifierProvider

public TokenIdentifierProvider getTokenIdentifierProvider()

Gets TokenIdentifierProvider

Specified by:

getTokenIdentifierProvider in interface DocumentAnalyzer

Returns:

TokenIdentifierProvider

setTokenIdentifierProvider

public void setTokenIdentifierProvider(TokenIdentifierProvider tokenIdentifierProvider)

Description copied from interface: DocumentAnalyzer

Sets the TokenIdentifierProvider

Specified by:

setTokenIdentifierProvider in interface DocumentAnalyzer

Parameters:

tokenIdentifierProvider - TokenIdentifierProvider

setDetachedContents

public void setDetachedContents(List<DSSDocument> detachedContents)

Description copied from interface: DocumentAnalyzer

Sets the List of DSSDocument containing the original contents to sign, for detached signature scenarios.

Specified by:

setDetachedContents in interface DocumentAnalyzer

Parameters:

detachedContents - the List of DSSDocument to set

setDetachedEvidenceRecordDocuments

public void setDetachedEvidenceRecordDocuments(List<DSSDocument> detachedEvidenceRecordDocuments)

Description copied from interface: DocumentAnalyzer

Sets a List of DSSDocument containing the evidence record documents covering the signature document.

Specified by:

setDetachedEvidenceRecordDocuments in interface DocumentAnalyzer

Parameters:

detachedEvidenceRecordDocuments - the List of DSSDocument to set

setContainerContents

public void setContainerContents(List<DSSDocument> containerContents)

Description copied from interface: DocumentAnalyzer

Sets the List of DSSDocument containing the original container content for ASiC-S signatures.

Specified by:

setContainerContents in interface DocumentAnalyzer

Parameters:

containerContents - the List of DSSDocument to set

setManifestFile

public void setManifestFile(ManifestFile manifestFile)

Description copied from interface: DocumentAnalyzer

Sets a related ManifestFile to the document to be validated.

Specified by:

setManifestFile in interface DocumentAnalyzer

Parameters:

manifestFile - a ManifestFile to set

getValidationTime

public Date getValidationTime()

Returns validation time In case if the validation time is not provided, initialize the current time value from the system

Specified by:

getValidationTime in interface DocumentAnalyzer

Returns:

Date validation time

setValidationTime

public void setValidationTime(Date validationTime)

Allows to define a custom validation time

Specified by:

setValidationTime in interface DocumentAnalyzer

Parameters:

validationTime - Date

setDetachedEvidenceRecords

public void setDetachedEvidenceRecords(List<EvidenceRecord> evidenceRecords)

Sets a list of detached evidence records

Parameters:

evidenceRecords - a list of EvidenceRecords

getSignaturePolicyProvider

protected SignaturePolicyProvider getSignaturePolicyProvider()

Returns a signaturePolicyProvider If not defined, returns a default provider

Returns:

SignaturePolicyProvider

setSignaturePolicyProvider

public void setSignaturePolicyProvider(SignaturePolicyProvider signaturePolicyProvider)

Description copied from interface: DocumentAnalyzer

This method allows to set a provider for Signature policies

Specified by:

setSignaturePolicyProvider in interface DocumentAnalyzer

Parameters:

signaturePolicyProvider - SignaturePolicyProvider

validate

public ValidationContext validate()

Description copied from interface: DocumentAnalyzer

This method performs validation of the document

Specified by:

validate in interface DocumentAnalyzer

Returns:

ValidationContext

prepareValidationContext

protected <T extends AdvancedSignature>
ValidationContext prepareValidationContext(Collection<T> signatures,
 Collection<TimestampToken> detachedTimestamps,
 Collection<EvidenceRecord> detachedEvidenceRecords,
 CertificateVerifier certificateVerifier)

Initializes and fills ValidationContext with necessary data sources

Type Parameters:

T - AdvancedSignature implementation

Parameters:

signatures - a collection of AdvancedSignatures

detachedTimestamps - a collection of detached TimestampTokens

detachedEvidenceRecords - a collection of detached EvidenceRecords

certificateVerifier - CertificateVerifier to be used for the validation

Returns:

ValidationContext

createValidationContext

protected ValidationContext createValidationContext()

This method creates a new instance of ValidationContext performing preparation of validation data, certificate chain building, revocation request, as well as custom validation checks execution.

Returns:

ValidationContext

getValidationData

public <T extends AdvancedSignature>
ValidationDataContainer getValidationData(Collection<T> signatures)

Description copied from interface: DocumentAnalyzer

Extracts a validation data for provided collection of signatures

Specified by:

getValidationData in interface DocumentAnalyzer

Type Parameters:

T - AdvancedSignature implementation

Parameters:

signatures - a collection of AdvancedSignatures

Returns:

ValidationDataContainer

getValidationData

public <T extends AdvancedSignature>
ValidationDataContainer getValidationData(Collection<T> signatures,
 Collection<TimestampToken> detachedTimestamps)

Description copied from interface: DocumentAnalyzer

Extracts a validation data for provided collection of signatures and/or timestamps

Specified by:

getValidationData in interface DocumentAnalyzer

Type Parameters:

T - AdvancedSignature implementation

Parameters:

signatures - a collection of AdvancedSignatures

detachedTimestamps - a collection of detached TimestampTokens

Returns:

ValidationDataContainer

instantiateValidationDataContainer

protected ValidationDataContainer instantiateValidationDataContainer()

Creates a new instance of ValidationDataContainer

Returns:

ValidationDataContainer

getAllEvidenceRecords

protected List<EvidenceRecord> getAllEvidenceRecords(List<AdvancedSignature> signatures,
 List<EvidenceRecord> detachedEvidenceRecords)

Returns a list of all found evidence records (embedded and detached)

Parameters:

signatures - a list of AdvancedSignatures

detachedEvidenceRecords - a list of detached EvidenceRecords

Returns:

a list of all EvidenceRecords

prepareSignatureValidationContext

protected <T extends AdvancedSignature> void prepareSignatureValidationContext(ValidationContext validationContext,
 Collection<T> allSignatures)

Prepares the validationContext for signature validation process

Type Parameters:

T - AdvancedSignature implementation

Parameters:

validationContext - ValidationContext

allSignatures - a collection of all AdvancedSignatures to be validated

prepareSignatureForVerification

protected <T extends AdvancedSignature> void prepareSignatureForVerification(ValidationContext validationContext,
 Collection<T> allSignatureList)

This method prepares a SignatureValidationContext for signatures validation

Type Parameters:

T - AdvancedSignature implementation

Parameters:

validationContext - ValidationContext is the implementation of the validators for: certificates, timestamps and revocation data.

allSignatureList - Collection of AdvancedSignatures to validate including the countersignatures

prepareDetachedTimestampValidationContext

protected void prepareDetachedTimestampValidationContext(ValidationContext validationContext,
 Collection<TimestampToken> timestamps)

Prepares the validationContext for a timestamp validation process

Parameters:

validationContext - ValidationContext

timestamps - a collection of detached timestamps

prepareDetachedEvidenceRecordValidationContext

protected void prepareDetachedEvidenceRecordValidationContext(ValidationContext validationContext,
 Collection<EvidenceRecord> evidenceRecords)

Prepares the validationContext for the evidence record validation process

Parameters:

validationContext - ValidationContext

evidenceRecords - a collection of detached evidence records

validateContext

protected void validateContext(ValidationContext validationContext)

Process the validation

Parameters:

validationContext - ValidationContext to process

getSignaturePolicyValidatorLoader

public SignaturePolicyValidatorLoader getSignaturePolicyValidatorLoader()

Returns an instance of a corresponding to the format SignaturePolicyValidatorLoader

Returns:

SignaturePolicyValidatorLoader

getAllSignatures

protected List<AdvancedSignature> getAllSignatures()

Returns a list of all signatures from the validating document

Returns:

a list of AdvancedSignatures

appendCounterSignatures

protected void appendCounterSignatures(List<AdvancedSignature> allSignatureList,
 AdvancedSignature signature)

The util method to link counter signatures with the related master signatures

Parameters:

allSignatureList - a list of AdvancedSignatures

signature - current AdvancedSignature

appendExternalEvidenceRecords

protected void appendExternalEvidenceRecords(List<AdvancedSignature> allSignatureList)

Appends detached evidence record provided to the validator to the corresponding signatures covering by the evidence record document

Parameters:

allSignatureList - a list of AdvancedSignatures

appendExternalEvidenceRecords

protected void appendExternalEvidenceRecords(TimestampToken timestampToken)

Appends the detached evidence records covering the time-stamp

Parameters:

timestampToken - TimestampToken

isTimestampCoveredByEvidenceRecord

protected boolean isTimestampCoveredByEvidenceRecord(TimestampToken timestampToken,
 EvidenceRecord evidenceRecord)

Checks whether the timestampToken is covered by the given evidenceRecord

Parameters:

timestampToken - TimestampToken

evidenceRecord - EvidenceRecord

Returns:

TRUE if the time-stamp is covered by the evidence record, FALSE otherwise

coversSignature

protected boolean coversSignature(AdvancedSignature signature,
 EvidenceRecord evidenceRecord)

Verifies whether an evidenceRecord covers the signature

Parameters:

signature - AdvancedSignature

evidenceRecord - EvidenceRecord

Returns:

TRUE if the evidence record covers the signature file, FALSE otherwise

getSignatures

public List<AdvancedSignature> getSignatures()

Description copied from interface: DocumentAnalyzer

Retrieves the signatures found in the document

Specified by:

getSignatures in interface DocumentAnalyzer

Returns:

a list of AdvancedSignatures for validation purposes

buildSignatures

protected List<AdvancedSignature> buildSignatures()

This method build a list of signatures to be extracted from a document

Returns:

a list of AdvancedSignatures

getDetachedTimestamps

public List<TimestampToken> getDetachedTimestamps()

Description copied from interface: DocumentAnalyzer

Retrieves the detached timestamps found in the document

Specified by:

getDetachedTimestamps in interface DocumentAnalyzer

Returns:

a list of TimestampToken for validation purposes

buildDetachedTimestamps

protected List<TimestampToken> buildDetachedTimestamps()

Builds a list of detached TimestampTokens extracted from the document

Returns:

a list of TimestampTokens

getTimestampReaders

protected List<TimestampAnalyzer> getTimestampReaders()

Returns a list of timestamp validators for timestamps embedded into the container

Returns:

a list of TimestampAnalyzers

getDetachedEvidenceRecords

public List<EvidenceRecord> getDetachedEvidenceRecords()

Description copied from interface: DocumentAnalyzer

Retrieves the detached evidence records found in the document

Specified by:

getDetachedEvidenceRecords in interface DocumentAnalyzer

Returns:

a list of Evidence Records for validation purposes

buildDetachedEvidenceRecords

protected List<EvidenceRecord> buildDetachedEvidenceRecords()

Builds a list of detached EvidenceRecords extracted from the document

Returns:

a list of EvidenceRecords

buildEvidenceRecord

protected EvidenceRecord buildEvidenceRecord(DSSDocument evidenceRecordDocument)

Builds an evidence record from the given DSSDocument

Parameters:

evidenceRecordDocument - DSSDocument containing an evidence record

Returns:

EvidenceRecord

getEvidenceRecord

protected EvidenceRecord getEvidenceRecord(EvidenceRecordAnalyzer evidenceRecordReader)

Gets an evidence record from a evidenceRecordReader

Parameters:

evidenceRecordReader - EvidenceRecordAnalyzer

Returns:

EvidenceRecord

getEvidenceRecordScopes

protected List<SignatureScope> getEvidenceRecordScopes(EvidenceRecord evidenceRecord)

Finds evidence record scopes

Parameters:

evidenceRecord - EvidenceRecord

Returns:

a list of SignatureScopes

processSignaturesValidation

protected <T extends AdvancedSignature> void processSignaturesValidation(Collection<T> allSignatureList)

Performs cryptographic validation of the signatures

Type Parameters:

T - AdvancedSignature

Parameters:

allSignatureList - a collection of AdvancedSignatures

getTimestampedReferences

protected List<TimestampedReference> getTimestampedReferences(List<SignatureScope> signatureScopes)

Returns a list of timestamped references from the given list of SignatureScopes

Parameters:

signatureScopes - a list of SignatureScopes

Returns:

a list of TimestampedReferences

addReference

protected boolean addReference(SignatureScope signatureScope)

Checks if the signature scope shall be added as a timestamped reference NOTE: used to avoid duplicates in ASiC with CAdES validator, due to covered signature/timestamp files

Parameters:

signatureScope - SignatureScope to check

Returns:

TRUE if the timestamped reference shall be created for the given SignatureScope, FALSE otherwise

getOriginalDocuments

public List<DSSDocument> getOriginalDocuments(String signatureId)

Description copied from interface: DocumentAnalyzer

This method returns the signed document(s) without their signature(s)

Specified by:

getOriginalDocuments in interface DocumentAnalyzer

Parameters:

signatureId - the DSS ID of the signature to extract original signer data for

Returns:

list of DSSDocuments

getSignatureById

public AdvancedSignature getSignatureById(String signatureId)

Returns the signature with the given id. Processes custom TokenIdentifierProvider and counter signatures

Parameters:

signatureId - String id of a signature to be extracted

Returns:

AdvancedSignature with the given id if found, NULL otherwise

validateSignaturePolicy

protected void validateSignaturePolicy(AdvancedSignature signature)

This method is used to perform validation of the signature policy's identifier, when present

Parameters:

signature - AdvancedSignature, which policy will be verified