com.guardtime.ksi.unisignature

Interface RFC3161Record

public interface RFC3161Record

An older implementation of the KSI service used the formats and protocols specified in the X.509 time-stamping standard (RFC 3161). In that format, the hash value of the time-stamped datum was not signed directly, but via several intermediate structures.

To facilitate conversion of legacy KSI signatures issued in the RFC 3161 format, the helper data structure is used, whit the following fields

• The `aggregation time', `chain index' and `input hash' fields have the same meaning as in the `aggregation chain' structure defined in Section 4.1.1.
• The `tstinfo prefix' and `tstinfo suffix' fields contain the data preceding and succeeding the hash value within the TSTInfo structure.
• The `tstinfo algorithm' field contains the one-byte identifier (as defined in Table 2) of the hash function used to hash the TSTInfo structure.
• The `signed attributes prefix' and `signed attributes suffix' fields contain the data preceding and succeeding the hash value within the SignedAttributes structure.
• The `signed attributes algorithm' field contains the one-byte identifier of the hash function used to hash the SignedAttributes structure.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ELEMENT_TYPE

Method Summary

Modifier and Type	Method and Description
Date	getAggregationTime() Returns the aggregation time of the RFC3161 record
List<Long>	getChainIndex() Returns the index of the RFC3161 record
DataHash	getInputHash() Returns the RFC3161 record input data hash
DataHash	getOutputHash(HashAlgorithm hashAlgorithm) Returns the RFC3161 record output data hash
HashAlgorithm	getSignedAttributesAlgorithm() Returns the hash algorithm of the RFC3161 record signed attributes
HashAlgorithm	getTstInfoAlgorithm() Returns the TSTInfo structure hash algorithm of the RFC3161 record

Field Detail

ELEMENT_TYPE

static final int ELEMENT_TYPE

See Also:

Constant Field Values

Method Detail

getInputHash

DataHash getInputHash()

Returns the RFC3161 record input data hash

getOutputHash

DataHash getOutputHash(HashAlgorithm hashAlgorithm)
                throws HashException

Returns the RFC3161 record output data hash

Throws:

HashException

getChainIndex

List<Long> getChainIndex()

Returns the index of the RFC3161 record

getAggregationTime

Date getAggregationTime()

Returns the aggregation time of the RFC3161 record

getTstInfoAlgorithm

HashAlgorithm getTstInfoAlgorithm()

Returns the TSTInfo structure hash algorithm of the RFC3161 record

getSignedAttributesAlgorithm

HashAlgorithm getSignedAttributesAlgorithm()

Returns the hash algorithm of the RFC3161 record signed attributes