com.guardtime.ksi.unisignature

Interface KSISignatureFactory

All Known Implementing Classes:

InMemoryKsiSignatureFactory

public interface KSISignatureFactory

Interface for creating signatures. Implementation of this class can be used to get instance of KSISignature.

Method Summary

Modifier and Type	Method and Description
KSISignature	createSignature(InputStream input) Creates a signature from input stream.
KSISignature	createSignature(KSISignature signature, AggregationHashChain aggregationHashChain, DataHash originalInputHash) Creates a signature by prepending lower aggregation hash chain to a signature.
KSISignature	createSignature(List<AggregationHashChain> aggregationHashChains, CalendarHashChain calendarHashChain, CalendarAuthenticationRecord authenticationRecord, PublicationRecord publicationRecord, RFC3161Record rfc3161Record) Creates a signature from given elements.
KSISignature	createSignature(TLVElement element, DataHash originalInputHash) Creates a signature from input TLV element.
KSISignature	createSignature(TLVElement element, DataHash originalInputHash, long level) Creates a signature from input TLV element.

Method Detail

createSignature

KSISignature createSignature(InputStream input)
                      throws KSIException

Creates a signature from input stream.

Parameters:

input - input stream to be used to createSignature data

Returns:

instance of KSISignature

Throws:

KSIException - when error occurs (e.g input data is invalid)

createSignature

KSISignature createSignature(TLVElement element,
                             DataHash originalInputHash)
                      throws KSIException

Creates a signature from input TLV element.

Parameters:

element - instance of TLVElement. not null

originalInputHash - - original input hash. It is used to verify signature if it is present.

Returns:

instance of KSISignature

Throws:

KSIException - when error occurs (e.g input data is invalid)

createSignature

KSISignature createSignature(TLVElement element,
                             DataHash originalInputHash,
                             long level)
                      throws KSIException

Creates a signature from input TLV element.

Parameters:

element - instance of TLVElement. not null

originalInputHash - - original input hash. It is used to verify signature if it is present.

level - - local aggregation tree height

Returns:

instance of KSISignature

Throws:

KSIException - when error occurs (e.g input data is invalid)

createSignature

KSISignature createSignature(List<AggregationHashChain> aggregationHashChains,
                             CalendarHashChain calendarHashChain,
                             CalendarAuthenticationRecord authenticationRecord,
                             PublicationRecord publicationRecord,
                             RFC3161Record rfc3161Record)
                      throws KSIException

Creates a signature from given elements.

Parameters:

aggregationHashChains - list of aggregation hash chain element. not null

calendarHashChain - calendar hash chain element. not null.

authenticationRecord - calendar hash chain authentication element.

publicationRecord - signature publication record.

rfc3161Record - signature RFC3161 record

Returns:

instance of KSISignature

Throws:

KSIException - when error occurs (e.g input data is invalid)

createSignature

KSISignature createSignature(KSISignature signature,
                             AggregationHashChain aggregationHashChain,
                             DataHash originalInputHash)
                      throws KSIException

Creates a signature by prepending lower aggregation hash chain to a signature.

Parameters:

signature - instance of KSISignature to be prepended, not null

aggregationHashChain - instance of lower AggregationHashChain to prepend, not null

originalInputHash - original input hash. It is used to verify signature if it is present.

Returns:

instance of KSISignature

Throws:

KSIException - when error occurs (e.g input data is invalid)