/// <summary>
/// Get extended calendar hash chain from given publication time.
/// </summary>
/// <param name="context">verification context</param>
/// <param name="publicationTime">publication time</param>
/// <returns></returns>
public static CalendarHashChain GetExtendedCalendarHashChain(IVerificationContext context, ulong publicationTime)
{
CalendarHashChain hashChain = context.GetExtendedCalendarHashChain(publicationTime);
if (hashChain == null)
{
throw new KsiVerificationException("Received invalid extended calendar hash chain from context extension function: null.");
}
return(hashChain);
}
/// <see cref="VerificationRule.Verify" />
public override VerificationResult Verify(IVerificationContext context)
{
IKsiSignature signature = GetSignature(context);
CalendarHashChain calendarHashChain = GetCalendarHashChain(signature, true);
CalendarHashChain extendedCalendarHashChain = calendarHashChain == null
? context.GetExtendedLatestCalendarHashChain()
: context.GetExtendedCalendarHashChain(calendarHashChain.PublicationTime);
if (extendedCalendarHashChain == null)
{
throw new KsiVerificationException("Received invalid extended calendar hash chain from context extension function: null.");
}
return(signature.GetLastAggregationHashChainRootHash() != extendedCalendarHashChain.InputHash
? new VerificationResult(GetRuleName(), VerificationResultCode.Fail, VerificationError.Cal02)
: new VerificationResult(GetRuleName(), VerificationResultCode.Ok));
}
/// <see cref="VerificationRule.Verify" />
public override VerificationResult Verify(IVerificationContext context)
{
IKsiSignature signature = GetSignature(context);
CalendarHashChain calendarHashChain = GetCalendarHashChain(signature, true);
CalendarHashChain extendedCalendarHashChain = calendarHashChain?.PublicationData == null
? context.GetExtendedLatestCalendarHashChain()
: context.GetExtendedCalendarHashChain(calendarHashChain.PublicationData.PublicationTime);
if (extendedCalendarHashChain == null)
{
throw new KsiVerificationException("Received invalid extended calendar hash chain from context extension function: null.");
}
ReadOnlyCollection <AggregationHashChain> aggregationHashChains = GetAggregationHashChains(signature, false);
ulong aggregationTime = aggregationHashChains[aggregationHashChains.Count - 1].AggregationTime;
return(aggregationTime != extendedCalendarHashChain.AggregationTime
? new VerificationResult(GetRuleName(), VerificationResultCode.Fail, VerificationError.Cal03)
: new VerificationResult(GetRuleName(), VerificationResultCode.Ok));
}
