Package eu.europa.esig.dss.cades

Class CMSUtils

java.lang.Object

eu.europa.esig.dss.cades.CMSUtils

public final class CMSUtils
extends Object

The utils for dealing with CMS and related objects

Field Summary

Fields

Modifier and Type	Field	Description
static final DigestAlgorithm	DEFAULT_ARCHIVE_TIMESTAMP_HASH_ALGO	The default DigestAlgorithm for ArchiveTimestamp

Method Summary

Modifier and Type	Method	Description
static org.bouncycastle.cms.CMSSignedData	addDigestAlgorithm(org.bouncycastle.cms.CMSSignedData cmsSignedData, org.bouncycastle.asn1.x509.AlgorithmIdentifier algorithmIdentifier)	This method adds a DigestAlgorithm used by an Archive TimeStamp to the SignedData.digestAlgorithms set, when required.
static void	addSigningCertificateAttribute(org.bouncycastle.asn1.ASN1EncodableVector signedAttributes, DigestAlgorithm digestAlgorithm, CertificateToken signingToken)	Method to add signing certificate to ASN.1 DER encoded signed attributes.
static boolean	containsATSTv2(org.bouncycastle.cms.SignerInformation signerInformation)	Checks if the given SignerInformation's unsignedProperties contain an archive-time-stamp (ATSv2) element
static org.bouncycastle.asn1.cms.AttributeTable	emptyIfNull(org.bouncycastle.asn1.cms.AttributeTable originalAttributeTable)	Returns the current originalAttributeTable if instantiated, an empty AttributeTable if null
static List<org.bouncycastle.tsp.TimeStampToken>	findArchiveTimeStampTokens(org.bouncycastle.asn1.cms.AttributeTable unsignedAttributes)	Finds archive TimeStampTokens
static org.bouncycastle.cms.CMSSignedData	generateCMSSignedData(org.bouncycastle.cms.CMSSignedDataGenerator generator, org.bouncycastle.cms.CMSTypedData content, boolean encapsulate)	This method generate CMSSignedData using the provided #CMSSignedDataGenerator, the content and the indication if the content should be encapsulated.
static org.bouncycastle.cms.SignerInformationStore	generateCounterSigners(org.bouncycastle.cms.CMSSignedDataGenerator cmsSignedDataGenerator, org.bouncycastle.cms.SignerInformation signerInfoToSign)	Generates a counter signature
static org.bouncycastle.cms.CMSSignedData	generateDetachedCMSSignedData(org.bouncycastle.cms.CMSSignedDataGenerator generator, org.bouncycastle.cms.CMSProcessableByteArray content)	Generates a detached CMS SignedData
static org.bouncycastle.asn1.ASN1Encodable	getAsn1Encodable(org.bouncycastle.asn1.cms.Attribute attribute)	Returns ASN1Encodable of the attribute
static org.bouncycastle.asn1.ASN1Sequence	getAtsHashIndex(org.bouncycastle.asn1.cms.AttributeTable timestampUnsignedAttributes)	Returns ats-hash-index table, with a related version present in from timestamp's unsigned properties
static org.bouncycastle.asn1.ASN1Sequence	getAtsHashIndexByVersion(org.bouncycastle.asn1.cms.AttributeTable timestampUnsignedAttributes, org.bouncycastle.asn1.ASN1ObjectIdentifier atsHashIndexVersionIdentifier)	Returns ats-hash-index table, with a specified version present in from timestamp's unsigned properties
static List<byte[]>	getATSHashIndexV3OctetString(org.bouncycastle.asn1.ASN1ObjectIdentifier attributeIdentifier, org.bouncycastle.asn1.ASN1Set attributeValues)	Returns octets from the given attribute for ATS-Hash-Index-v3 table
static org.bouncycastle.asn1.ASN1ObjectIdentifier	getAtsHashIndexVersionIdentifier(org.bouncycastle.asn1.cms.AttributeTable timestampUnsignedAttributes)	Returns ASN1ObjectIdentifier of the found AtsHashIndex
static org.bouncycastle.asn1.cms.AttributeTable	getAttributesFromByteArray(byte[] encodedAttributes)	This method returns an AttributeTable parsed from ASN.1 encoded representation
static org.bouncycastle.asn1.ASN1Sequence	getCertificatesHashIndex(org.bouncycastle.asn1.ASN1Sequence atsHashIndexValue)	Extract the Unsigned Attribute Archive Timestamp Cert Hash Index from a timestampToken
static org.bouncycastle.cms.CMSSignedData	getCMSSignedData(org.bouncycastle.asn1.cms.Attribute attribute)	Creates a CMSSignedData from the provided attribute
static org.bouncycastle.cms.CMSTypedData	getContentToBeSigned(DSSDocument toSignData)	Returns the content to be signed
static org.bouncycastle.asn1.ASN1Sequence	getCRLHashIndex(org.bouncycastle.asn1.ASN1Sequence atsHashIndexValue)	Extract the Unsigned Attribute Archive Timestamp Crl Hash Index from a timestampToken
static org.bouncycastle.asn1.DERTaggedObject	getDERSignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation)	Gets the DER SignedAttributes table from the given SignerInformation
static org.bouncycastle.operator.DigestCalculatorProvider	getDigestCalculatorProvider(DSSDocument toSignDocument, DigestAlgorithm digestAlgorithm)	Returns a DigestCalculatorProvider
static List<byte[]>	getOctetStringForAtsHashIndex(org.bouncycastle.asn1.cms.Attribute attribute, org.bouncycastle.asn1.ASN1ObjectIdentifier atsHashIndexVersionIdentifier)	Returns octets from the given attribute by defined atsh-hash-index type
static DSSDocument	getOriginalDocument(org.bouncycastle.cms.CMSSignedData cmsSignedData, List<DSSDocument> detachedDocuments)	Returns the original document from the provided cmsSignedData
static org.bouncycastle.asn1.cms.Attribute	getSignedAttribute(org.bouncycastle.cms.SignerInformation signerInformation, org.bouncycastle.asn1.ASN1ObjectIdentifier oid)	Returns a signed attribute with the given oid from signerInformation if present and unique.
static org.bouncycastle.asn1.cms.AttributeTable	getSignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation)	This method returns the existing signed attributes or a new empty attributes hashtable
static org.bouncycastle.asn1.cms.Attribute[]	getSignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation, org.bouncycastle.asn1.ASN1ObjectIdentifier oid)	Returns signed attributes matching the given oid from signerInformation if present.
static byte[]	getSignedContent(org.bouncycastle.cms.CMSTypedData cmsTypedData)	This method returns the signed content extracted from a CMSTypedData
static List<org.bouncycastle.asn1.ASN1ObjectIdentifier>	getTimestampOids()	Returns a list of all CMS timestamp identifiers
static org.bouncycastle.tsp.TimeStampToken	getTimeStampToken(org.bouncycastle.asn1.cms.Attribute attribute)	Creates a TimeStampToken from the provided attribute
static TimestampType	getTimestampTypeByOid(org.bouncycastle.asn1.ASN1ObjectIdentifier oid)	This method returns a corresponding TimestampType for the given CMS oid
static org.bouncycastle.asn1.cms.Attribute	getUnsignedAttribute(org.bouncycastle.cms.SignerInformation signerInformation, org.bouncycastle.asn1.ASN1ObjectIdentifier oid)	Returns an unsigned attribute with the given oid from signerInformation if present and unique.
static org.bouncycastle.asn1.cms.AttributeTable	getUnsignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation)	This method returns the existing unsigned attributes or a new empty attributes hashtable
static org.bouncycastle.asn1.cms.Attribute[]	getUnsignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation, org.bouncycastle.asn1.ASN1ObjectIdentifier oid)	Returns unsigned attributes matching the given oid from signerInformation if present.
static org.bouncycastle.asn1.ASN1Sequence	getUnsignedAttributesHashIndex(org.bouncycastle.asn1.ASN1Sequence atsHashIndexValue)	Extract the Unsigned Attribute Archive Timestamp Attribute Hash Index from a timestampToken
static boolean	isArchiveTimeStampToken(org.bouncycastle.asn1.cms.Attribute attribute)	Checks if the attribute is of an allowed archive timestamp type
static boolean	isAttributeOfType(org.bouncycastle.asn1.cms.Attribute attribute, org.bouncycastle.asn1.ASN1ObjectIdentifier asn1ObjectIdentifier)	Checks if the given attribute is an instance of the expected asn1ObjectIdentifier type
static boolean	isCMSSignedDataEqual(org.bouncycastle.cms.CMSSignedData signedData, org.bouncycastle.cms.CMSSignedData signedDataToCompare)	Compares two CMSSignedData objects by their encoded binaries
static boolean	isDetachedSignature(org.bouncycastle.cms.CMSSignedData cmsSignedData)	Checks if the signature is detached
static boolean	isEmpty(org.bouncycastle.asn1.cms.AttributeTable attributeTable)	Checks if the attributeTable is empty
static org.bouncycastle.cms.CMSSignedData	populateDigestAlgorithmSet(org.bouncycastle.cms.CMSSignedData newCmsSignedData, org.bouncycastle.cms.CMSSignedData oldCmsSignedData)	This method is used to ensure the presence of all items from SignedData.digestAlgorithm set from oldCmsSignedData within newCmsSignedData
static Date	readSigningDate(org.bouncycastle.asn1.ASN1Encodable attrValue)	Reads the SigningDate with respect to the RFC 3852

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_ARCHIVE_TIMESTAMP_HASH_ALGO

public static final DigestAlgorithm DEFAULT_ARCHIVE_TIMESTAMP_HASH_ALGO

The default DigestAlgorithm for ArchiveTimestamp

Method Details

generateCMSSignedData

public static org.bouncycastle.cms.CMSSignedData generateCMSSignedData(org.bouncycastle.cms.CMSSignedDataGenerator generator,
 org.bouncycastle.cms.CMSTypedData content,
 boolean encapsulate)

This method generate CMSSignedData using the provided #CMSSignedDataGenerator, the content and the indication if the content should be encapsulated.

Parameters:

generator - CMSSignedDataGenerator

content - CMSTypedData

encapsulate - true if the content should be encapsulated in the signature, false otherwise

Returns:

CMSSignedData

generateCounterSigners

public static org.bouncycastle.cms.SignerInformationStore generateCounterSigners(org.bouncycastle.cms.CMSSignedDataGenerator cmsSignedDataGenerator,
 org.bouncycastle.cms.SignerInformation signerInfoToSign)

Generates a counter signature

Parameters:

cmsSignedDataGenerator - CMSSignedDataGenerator to extend the CMS SignedData

signerInfoToSign - SignerInformation to be counter-signed

Returns:

SignerInformationStore with a counter signature

generateDetachedCMSSignedData

public static org.bouncycastle.cms.CMSSignedData generateDetachedCMSSignedData(org.bouncycastle.cms.CMSSignedDataGenerator generator,
 org.bouncycastle.cms.CMSProcessableByteArray content)

Generates a detached CMS SignedData

Parameters:

generator - CMSSignedDataGenerator

content - CMSProcessableByteArray to sign

Returns:

CMSSignedData

populateDigestAlgorithmSet

public static org.bouncycastle.cms.CMSSignedData populateDigestAlgorithmSet(org.bouncycastle.cms.CMSSignedData newCmsSignedData,
 org.bouncycastle.cms.CMSSignedData oldCmsSignedData)

This method is used to ensure the presence of all items from SignedData.digestAlgorithm set from oldCmsSignedData within newCmsSignedData

Parameters:

newCmsSignedData - CMSSignedData to be extended with digest algorithms, if required

oldCmsSignedData - CMSSignedData to copy digest algorithms set from

Returns:

extended CMSSignedData

addDigestAlgorithm

public static org.bouncycastle.cms.CMSSignedData addDigestAlgorithm(org.bouncycastle.cms.CMSSignedData cmsSignedData,
 org.bouncycastle.asn1.x509.AlgorithmIdentifier algorithmIdentifier)

This method adds a DigestAlgorithm used by an Archive TimeStamp to the SignedData.digestAlgorithms set, when required. See ETSI EN 319 122-1, ch. "5.5.3 The archive-time-stamp-v3 attribute"

Parameters:

cmsSignedData - CMSSignedData to extend

algorithmIdentifier - AlgorithmIdentifier to add

Returns:

CMSSignedData

getDERSignedAttributes

public static org.bouncycastle.asn1.DERTaggedObject getDERSignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation)

Gets the DER SignedAttributes table from the given SignerInformation

Parameters:

signerInformation - SignerInformation

Returns:

DERTaggedObject representing the signed attributes

getSignedContent

public static byte[] getSignedContent(org.bouncycastle.cms.CMSTypedData cmsTypedData)

This method returns the signed content extracted from a CMSTypedData

Parameters:

cmsTypedData - CMSTypedData cannot be null

Returns:

the signed content extracted from CMSTypedData

getUnsignedAttributes

public static org.bouncycastle.asn1.cms.AttributeTable getUnsignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation)

This method returns the existing unsigned attributes or a new empty attributes hashtable

Parameters:

signerInformation - the signer information

Returns:

the existing unsigned attributes or an empty attributes hashtable

getSignedAttributes

public static org.bouncycastle.asn1.cms.AttributeTable getSignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation)

This method returns the existing signed attributes or a new empty attributes hashtable

Parameters:

signerInformation - the signer information

Returns:

the existing signed attributes or an empty attributes Hashtable

getAttributesFromByteArray

public static org.bouncycastle.asn1.cms.AttributeTable getAttributesFromByteArray(byte[] encodedAttributes)

This method returns an AttributeTable parsed from ASN.1 encoded representation

Parameters:

encodedAttributes - ASN.1 encoded AttributesTable

Returns:

AttributeTable created from given encodedAttributes

addSigningCertificateAttribute

public static void addSigningCertificateAttribute(org.bouncycastle.asn1.ASN1EncodableVector signedAttributes,
 DigestAlgorithm digestAlgorithm,
 CertificateToken signingToken)

Method to add signing certificate to ASN.1 DER encoded signed attributes. Certificate will be added as either signing-certificate or signing-certificate-v2 attribute depending on digest algorithm being used.

Parameters:

signedAttributes - Signed attributes to append signing certificate to

digestAlgorithm - the digest algorithm to be used

signingToken - The signing certificate to be appended

isCMSSignedDataEqual

public static boolean isCMSSignedDataEqual(org.bouncycastle.cms.CMSSignedData signedData,
 org.bouncycastle.cms.CMSSignedData signedDataToCompare)
                                    throws IOException

Compares two CMSSignedData objects by their encoded binaries

Parameters:

signedData - CMSSignedData object to compare

signedDataToCompare - CMSSignedData object to compare with

Returns:

true if binaries of two CMSSignedData are equal, false otherwise

Throws:

IOException - if an exception occurs

getSignedAttribute

public static org.bouncycastle.asn1.cms.Attribute getSignedAttribute(org.bouncycastle.cms.SignerInformation signerInformation,
 org.bouncycastle.asn1.ASN1ObjectIdentifier oid)

Returns a signed attribute with the given oid from signerInformation if present and unique. If multiple Attributes extraction is expected, please use #getSignedAttributes(signerInformation, oid) method.

Parameters:

signerInformation - SignerInformation containing signed attributes

oid - ASN1ObjectIdentifier oid of the element to extract

Returns:

Attribute with the given OID

getSignedAttributes

public static org.bouncycastle.asn1.cms.Attribute[] getSignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation,
 org.bouncycastle.asn1.ASN1ObjectIdentifier oid)

Returns signed attributes matching the given oid from signerInformation if present. Otherwise, returns an empty array.

Parameters:

signerInformation - SignerInformation containing signed attributes

oid - ASN1ObjectIdentifier oid of the elements to extract

Returns:

an array of Attributes with the given OID

getUnsignedAttribute

public static org.bouncycastle.asn1.cms.Attribute getUnsignedAttribute(org.bouncycastle.cms.SignerInformation signerInformation,
 org.bouncycastle.asn1.ASN1ObjectIdentifier oid)

Returns an unsigned attribute with the given oid from signerInformation if present and unique. If multiple Attributes extraction is expected, please use #getUnsignedAttributes(signerInformation, oid) method.

Parameters:

signerInformation - SignerInformation to get attribute from

oid - ASN1ObjectIdentifier of the target attribute

Returns:

Attribute

getUnsignedAttributes

public static org.bouncycastle.asn1.cms.Attribute[] getUnsignedAttributes(org.bouncycastle.cms.SignerInformation signerInformation,
 org.bouncycastle.asn1.ASN1ObjectIdentifier oid)

Returns unsigned attributes matching the given oid from signerInformation if present. Otherwise, returns an empty array.

Parameters:

signerInformation - SignerInformation containing unsigned attributes

oid - ASN1ObjectIdentifier oid of the elements to extract

Returns:

an array of Attributes with the given OID

isDetachedSignature

public static boolean isDetachedSignature(org.bouncycastle.cms.CMSSignedData cmsSignedData)

Checks if the signature is detached

Parameters:

cmsSignedData - CMSSignedData

Returns:

TRUE if the signature is detached, FALSE otherwise

getOriginalDocument

public static DSSDocument getOriginalDocument(org.bouncycastle.cms.CMSSignedData cmsSignedData,
 List<DSSDocument> detachedDocuments)

Returns the original document from the provided cmsSignedData

Parameters:

cmsSignedData - CMSSignedData to get original document from

detachedDocuments - list of DSSDocuments

Returns:

original DSSDocument

getContentToBeSigned

public static org.bouncycastle.cms.CMSTypedData getContentToBeSigned(DSSDocument toSignData)

Returns the content to be signed

Parameters:

toSignData - DSSDocument to sign

Returns:

CMSTypedData

getDigestCalculatorProvider

public static org.bouncycastle.operator.DigestCalculatorProvider getDigestCalculatorProvider(DSSDocument toSignDocument,
 DigestAlgorithm digestAlgorithm)

Returns a DigestCalculatorProvider

Parameters:

toSignDocument - DSSDocument to sign

digestAlgorithm - DigestAlgorithm to use

Returns:

DigestCalculatorProvider

containsATSTv2

public static boolean containsATSTv2(org.bouncycastle.cms.SignerInformation signerInformation)

Checks if the given SignerInformation's unsignedProperties contain an archive-time-stamp (ATSv2) element

Parameters:

signerInformation - SignerInformation to check

Returns:

TRUE if the signerInformation contains an ATSv2, FALSE otherwise

readSigningDate

public static Date readSigningDate(org.bouncycastle.asn1.ASN1Encodable attrValue)

Reads the SigningDate with respect to the RFC 3852

Parameters:

attrValue - ASN1Encodable containing the signingDate

Returns:

Date if its format is correct, null otherwise

findArchiveTimeStampTokens

public static List<org.bouncycastle.tsp.TimeStampToken> findArchiveTimeStampTokens(org.bouncycastle.asn1.cms.AttributeTable unsignedAttributes)

Finds archive TimeStampTokens

Parameters:

unsignedAttributes - AttributeTable to obtain timestamps from

Returns:

a list of TimeStampTokens

getTimestampOids

public static List<org.bouncycastle.asn1.ASN1ObjectIdentifier> getTimestampOids()

Returns a list of all CMS timestamp identifiers

Returns:

a list of ASN1ObjectIdentifiers

isArchiveTimeStampToken

public static boolean isArchiveTimeStampToken(org.bouncycastle.asn1.cms.Attribute attribute)

Checks if the attribute is of an allowed archive timestamp type

Parameters:

attribute - Attribute to check

Returns:

true if the attribute represents an archive timestamp element, false otherwise

getTimestampTypeByOid

public static TimestampType getTimestampTypeByOid(org.bouncycastle.asn1.ASN1ObjectIdentifier oid)

This method returns a corresponding TimestampType for the given CMS oid

Parameters:

oid - ASN1ObjectIdentifier of the timestamp attribute

Returns:

TimestampType, null when OID is not recognized

getAtsHashIndex

public static org.bouncycastle.asn1.ASN1Sequence getAtsHashIndex(org.bouncycastle.asn1.cms.AttributeTable timestampUnsignedAttributes)

Returns ats-hash-index table, with a related version present in from timestamp's unsigned properties

Parameters:

timestampUnsignedAttributes - AttributeTable unsigned properties of the timestamp

Returns:

the content of SignedAttribute: ATS-hash-index unsigned attribute with a present version

getCertificatesHashIndex

public static org.bouncycastle.asn1.ASN1Sequence getCertificatesHashIndex(org.bouncycastle.asn1.ASN1Sequence atsHashIndexValue)

Extract the Unsigned Attribute Archive Timestamp Cert Hash Index from a timestampToken

Parameters:

atsHashIndexValue - ASN1Sequence

Returns:

ASN1Sequence

getCRLHashIndex

public static org.bouncycastle.asn1.ASN1Sequence getCRLHashIndex(org.bouncycastle.asn1.ASN1Sequence atsHashIndexValue)

Extract the Unsigned Attribute Archive Timestamp Crl Hash Index from a timestampToken

Parameters:

atsHashIndexValue - ASN1Sequence

Returns:

ASN1Sequence

getUnsignedAttributesHashIndex

public static org.bouncycastle.asn1.ASN1Sequence getUnsignedAttributesHashIndex(org.bouncycastle.asn1.ASN1Sequence atsHashIndexValue)

Extract the Unsigned Attribute Archive Timestamp Attribute Hash Index from a timestampToken

Parameters:

atsHashIndexValue - ASN1Sequence

Returns:

ASN1Sequence

getAtsHashIndexByVersion

public static org.bouncycastle.asn1.ASN1Sequence getAtsHashIndexByVersion(org.bouncycastle.asn1.cms.AttributeTable timestampUnsignedAttributes,
 org.bouncycastle.asn1.ASN1ObjectIdentifier atsHashIndexVersionIdentifier)

Returns ats-hash-index table, with a specified version present in from timestamp's unsigned properties

Parameters:

timestampUnsignedAttributes - AttributeTable unsigned properties of the timestamp

atsHashIndexVersionIdentifier - ASN1ObjectIdentifier identifier of ats-hash-index table to get

Returns:

the content of SignedAttribute: ATS-hash-index unsigned attribute with a requested version if present

getAtsHashIndexVersionIdentifier

public static org.bouncycastle.asn1.ASN1ObjectIdentifier getAtsHashIndexVersionIdentifier(org.bouncycastle.asn1.cms.AttributeTable timestampUnsignedAttributes)

Returns ASN1ObjectIdentifier of the found AtsHashIndex

Parameters:

timestampUnsignedAttributes - AttributeTable of the timestamp's unsignedAttributes

Returns:

ASN1ObjectIdentifier of the AtsHashIndex element version

getOctetStringForAtsHashIndex

public static List<byte[]> getOctetStringForAtsHashIndex(org.bouncycastle.asn1.cms.Attribute attribute,
 org.bouncycastle.asn1.ASN1ObjectIdentifier atsHashIndexVersionIdentifier)

Returns octets from the given attribute by defined atsh-hash-index type

Parameters:

attribute - Attribute to get byte array from

atsHashIndexVersionIdentifier - ASN1ObjectIdentifier to specify rules

Returns:

byte array

getATSHashIndexV3OctetString

public static List<byte[]> getATSHashIndexV3OctetString(org.bouncycastle.asn1.ASN1ObjectIdentifier attributeIdentifier,
 org.bouncycastle.asn1.ASN1Set attributeValues)

Returns octets from the given attribute for ATS-Hash-Index-v3 table

Parameters:

attributeIdentifier - ASN1ObjectIdentifier of the corresponding Attribute

attributeValues - ASN1Set of the corresponding Attribute

Returns:

byte array representing an octet string

isEmpty

public static boolean isEmpty(org.bouncycastle.asn1.cms.AttributeTable attributeTable)

Checks if the attributeTable is empty

Parameters:

attributeTable - AttributeTable

Returns:

TRUE if the attribute table is empty, FALSE otherwise

emptyIfNull

public static org.bouncycastle.asn1.cms.AttributeTable emptyIfNull(org.bouncycastle.asn1.cms.AttributeTable originalAttributeTable)

Returns the current originalAttributeTable if instantiated, an empty AttributeTable if null

Parameters:

originalAttributeTable - AttributeTable

Returns:

AttributeTable

isAttributeOfType

public static boolean isAttributeOfType(org.bouncycastle.asn1.cms.Attribute attribute,
 org.bouncycastle.asn1.ASN1ObjectIdentifier asn1ObjectIdentifier)

Checks if the given attribute is an instance of the expected asn1ObjectIdentifier type

Parameters:

attribute - Attribute to check

asn1ObjectIdentifier - ASN1ObjectIdentifier type to check against

Returns:

TRUE if the attribute is of type asn1ObjectIdentifier, FALSE otherwise

getTimeStampToken

public static org.bouncycastle.tsp.TimeStampToken getTimeStampToken(org.bouncycastle.asn1.cms.Attribute attribute)

Creates a TimeStampToken from the provided attribute

Parameters:

attribute - Attribute to generate TimeStampToken from

Returns:

TimeStampToken

getCMSSignedData

public static org.bouncycastle.cms.CMSSignedData getCMSSignedData(org.bouncycastle.asn1.cms.Attribute attribute)
                                                           throws org.bouncycastle.cms.CMSException,
IOException

Creates a CMSSignedData from the provided attribute

Parameters:

attribute - Attribute to generate CMSSignedData from

Returns:

CMSSignedData

Throws:

IOException - in case of encoding exception

org.bouncycastle.cms.CMSException - in case if the provided attribute cannot be converted to CMSSignedData

getAsn1Encodable

public static org.bouncycastle.asn1.ASN1Encodable getAsn1Encodable(org.bouncycastle.asn1.cms.Attribute attribute)

Returns ASN1Encodable of the attribute

Parameters:

attribute - Attribute

Returns:

ASN1Encodable