/// <summary>
/// Get publications file.
/// </summary>
/// <returns>publications file</returns>
public IPublicationsFile GetPublicationsFile()
{
if (_publicationsFileLoadTime > DateTime.Now.AddHours(-1) && _publicationsFile != null)
{
return(_publicationsFile);
}
_publicationsFile = _ksiService.GetPublicationsFile();
if (_publicationsFile == null)
{
throw new KsiException("Invalid publications file: null.");
}
_publicationsFileLoadTime = DateTime.Now;
return(_publicationsFile);
}
/// <summary>
/// Verify given KSI signature.
/// At first the signature is verified against given document hash and publications file. Publications file is downloaded using given KSI service.
/// If suitable publication is not found in publications file then the KSI signature is extended.
/// If extending is not yet possible then key based verification is done.
/// </summary>
/// <param name="ksiSignature">KSI signature to be verified.</param>
/// <param name="documentHash">Document hash</param>
/// <param name="ksiService">KSI services for downloading publications file and extending KSI signature if needed.</param>
/// <returns>verification result</returns>
public VerificationResult Verify(IKsiSignature ksiSignature, DataHash documentHash, IKsiService ksiService)
{
if (ksiSignature == null)
{
throw new ArgumentNullException(nameof(ksiSignature));
}
if (ksiService == null)
{
throw new ArgumentNullException(nameof(ksiService));
}
return(base.Verify(new VerificationContext()
{
Signature = ksiSignature,
DocumentHash = documentHash,
PublicationsFile = ksiService.GetPublicationsFile(),
KsiService = ksiService,
IsExtendingAllowed = true
}));
}