es.gob.afirma.utils

Class UtilsTimestampPdfBc

java.lang.Object

es.gob.afirma.utils.UtilsTimestampPdfBc

public final class UtilsTimestampPdfBc
extends java.lang.Object

Class that contains methods related to the manage of timestamps.

Project:

Library for the integration with the services of @Firma, eVisor and TS@.

Version:

1.1, 18/04/2022.

Field Summary

Fields

Modifier and Type	Field and Description
static Logger	LOGGER Attribute that represents the object that manages the log of the class.

Method Summary

Modifier and Type	Method and Description
static org.bouncycastle.tsp.TimeStampToken	getFirstTimeStampToken(org.bouncycastle.asn1.ASN1EncodableVector unsignedAttributes) Method that obtains the first time-stamp contained inside of a list of unsigned attributes.
static java.util.List<org.bouncycastle.tsp.TimeStampToken>	getOrderedTimeStampTokens(org.bouncycastle.asn1.ASN1EncodableVector unsignedAttributes) Method that obtains a list with the timestamps contained inside of a set of unsigned attributes.
static java.security.cert.X509Certificate	getSigningCertificate(org.bouncycastle.tsp.TimeStampToken tst) Method that obtain the the signing certificate of a timestamp.
static org.bouncycastle.tsp.TimeStampToken	getTimeStampToken(org.bouncycastle.asn1.cms.Attribute signatureTimeStampAttribute, java.security.cert.X509Certificate signingCertificate) Method that obtains the time-stamp contained inside of a signature-time-stamp attribute.
static org.bouncycastle.tsp.TimeStampToken	getTimeStampToken(org.bouncycastle.cms.SignerInformation signerInformation) Method that obtains the timestamp from the information about a signer of a signature, if it contains a timestamp.
static void	validateASN1Timestamp(org.bouncycastle.tsp.TimeStampToken tst) Method that validates an ASN.1 timestamp.
static void	validateTimestampMessageImprint(org.bouncycastle.tsp.TimeStampToken tst, byte[] stampedData) Method that checks if the value of the messageImprint field within time-stamp token is a hash of the value indicated.

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

public static final Logger LOGGER

Attribute that represents the object that manages the log of the class.

Method Detail

getSigningCertificate

public static java.security.cert.X509Certificate getSigningCertificate(org.bouncycastle.tsp.TimeStampToken tst)
                                                                throws SigningException

Method that obtain the the signing certificate of a timestamp.

Parameters:

tst - Parameter that represents the timestamp.

Returns:

an object that represents the certificate.

Throws:

SigningException - If the method fails.

validateASN1Timestamp

public static void validateASN1Timestamp(org.bouncycastle.tsp.TimeStampToken tst)
                                  throws SigningException

Method that validates an ASN.1 timestamp.

Parameters:

tst - Parameter that represents the ASN.1 timestamp to validate.

Throws:

SigningException - If the method fails or the timestamp isn't valid.

getTimeStampToken

public static org.bouncycastle.tsp.TimeStampToken getTimeStampToken(org.bouncycastle.cms.SignerInformation signerInformation)
                                                             throws SigningException

Method that obtains the timestamp from the information about a signer of a signature, if it contains a timestamp.

Parameters:

signerInformation - Parameter that represents the information of the signer.

Returns:

an object that represents the timestamp, or null.

Throws:

SigningException - If the timestamp is malformed.

getFirstTimeStampToken

public static org.bouncycastle.tsp.TimeStampToken getFirstTimeStampToken(org.bouncycastle.asn1.ASN1EncodableVector unsignedAttributes)
                                                                  throws SigningException

Method that obtains the first time-stamp contained inside of a list of unsigned attributes.

Parameters:

unsignedAttributes - Parameter that represents the list of unsigned attribute of an ASN.1 signature.

Returns:

an object that represents the time-stamp.

Throws:

SigningException - If one of the attributes contains a badly formed time-stamp.

getTimeStampToken

public static org.bouncycastle.tsp.TimeStampToken getTimeStampToken(org.bouncycastle.asn1.cms.Attribute signatureTimeStampAttribute,
                                                                    java.security.cert.X509Certificate signingCertificate)
                                                             throws SigningException

Method that obtains the time-stamp contained inside of a signature-time-stamp attribute.

Parameters:

signatureTimeStampAttribute - Parameter that represents the signature-time-stamp attribute.

signingCertificate - Parameter that represents the signing certificate.

Returns:

an object that represents the time-stamp.

Throws:

SigningException - If the time-stamp is badly encoded.

validateTimestampMessageImprint

public static void validateTimestampMessageImprint(org.bouncycastle.tsp.TimeStampToken tst,
                                                   byte[] stampedData)
                                            throws SigningException

Method that checks if the value of the messageImprint field within time-stamp token is a hash of the value indicated.

Parameters:

tst - Parameter that represents the timestamp.

stampedData - Parameter that represents the data stamped to compare with it.

Throws:

SigningException - If the validation fails.

getOrderedTimeStampTokens

public static java.util.List<org.bouncycastle.tsp.TimeStampToken> getOrderedTimeStampTokens(org.bouncycastle.asn1.ASN1EncodableVector unsignedAttributes)
                                                                                     throws SigningException

Method that obtains a list with the timestamps contained inside of a set of unsigned attributes.

Parameters:

unsignedAttributes - Parameter that represents the set of unsigned attributes.

Returns:

the list sorted in ascending order.

Throws:

SigningException - If the method fails.