/// <summary>
/// Loads <see cref="Card"/> from the specified <see cref="RawSignedModel"/>.
/// </summary>
/// <param name="cardCrypto">an instance of <see cref="ICardCrypto"/>.</param>
/// <param name="rawSignedModel">an instance of <see cref="RawSignedModel"/> to get
/// <see cref="Card"/> from.</param>
/// <param name="isOutdated"></param>
/// <returns>Loaded instance of <see cref="Card"/>.</returns>
public static Card Parse(ICardCrypto cardCrypto, RawSignedModel rawSignedModel, bool isOutdated = false)
{
ValidateParams(cardCrypto, rawSignedModel);
var rawCardContent = SnapshotUtils.ParseSnapshot <RawCardContent>(rawSignedModel.ContentSnapshot);
var signatures = new List <CardSignature>();
if (rawSignedModel.Signatures != null)
{
foreach (var s in rawSignedModel.Signatures)
{
var cardSignature = new CardSignature
{
Signer = s.Signer,
Signature = s.Signature,
ExtraFields = TryParseExtraFields(s.Snapshot),
Snapshot = s.Snapshot
};
signatures.Add(cardSignature);
}
}
return(new Card(
GenerateCardId(cardCrypto, rawSignedModel.ContentSnapshot),
rawCardContent.Identity,
cardCrypto.ImportPublicKey(rawCardContent.PublicKey),
rawCardContent.Version,
rawCardContent.CreatedAt,
signatures,
rawCardContent.PreviousCardId,
rawSignedModel.ContentSnapshot,
isOutdated
));
}
private static Dictionary <string, string> TryParseExtraFields(byte[] signatureSnapshot)
{
Dictionary <string, string> extraFields = null;
if (signatureSnapshot != null)
{
try
{
extraFields = SnapshotUtils.ParseSnapshot <Dictionary <string, string> >(signatureSnapshot);
}
catch (Exception)
{
}
}
return(extraFields);
}
internal static RawSignedModel Generate(
ICardCrypto cardCrypto,
CardParams @params,
DateTime createdAt)
{
ValidateGenerateParams(cardCrypto, @params);
var details = new RawCardContent
{
Identity = @params.Identity,
PublicKey = cardCrypto.ExportPublicKey(@params.PublicKey),
Version = CardVersion,
CreatedAt = createdAt,
PreviousCardId = @params.PreviousCardId
};
return(new RawSignedModel()
{
ContentSnapshot = SnapshotUtils.TakeSnapshot(details)
});
}