/// <summary>
/// Verifies contents of list of relationships returned by the profile server against the expected list of cards.
/// </summary>
/// <param name="CardNumbers">Numbers of cards that are expected to be in the relationship list.</param>
/// <param name="RelationshipList">Card list returned by the profile server.</param>
/// <returns>true if the <paramref name="RelationshipList"/> contains cards specified by card numbers in <paramref name="CardNumbers"/>.</returns>
public bool CheckRelationships(HashSet <int> CardNumbers, IEnumerable <IdentityRelationship> RelationshipList)
{
log.Trace("()");
bool error = false;
bool[] cardsOk = new bool[SignedCards.Count];
foreach (IdentityRelationship relationship in RelationshipList)
{
CardApplicationInformation cardApplication = relationship.CardApplication;
byte[] cardApplicationSignature = relationship.CardApplicationSignature.ToByteArray();
SignedRelationshipCard signedCard = relationship.Card;
RelationshipCard card = signedCard.Card;
byte[] cardId = card.CardId.ToByteArray();
int cardIndex = -1;
for (int i = 0; i < SignedCards.Count; i++)
{
byte[] existingCardId = SignedCards[i].Card.CardId.ToByteArray();
if (!cardsOk[i] && (StructuralComparisons.StructuralComparer.Compare(existingCardId, cardId) == 0))
{
cardIndex = i;
break;
}
}
if (cardIndex != -1)
{
if (CardNumbers.Contains(cardIndex + 1))
{
byte[] issuerPublicKey = card.IssuerPublicKey.ToByteArray();
byte[] cardSignature = signedCard.IssuerSignature.ToByteArray();
bool cardSignatureOk = Ed25519.Verify(cardSignature, cardId, issuerPublicKey);
bool cardContentOk = StructuralComparisons.StructuralComparer.Compare(SignedCards[cardIndex].ToByteArray(), signedCard.ToByteArray()) == 0;
bool cardOk = cardSignatureOk && cardContentOk;
byte[] recipientPublicKey = card.RecipientPublicKey.ToByteArray();
bool applicationSignatureOk = Ed25519.Verify(cardApplicationSignature, cardApplication.ToByteArray(), recipientPublicKey);
bool applicationContentOk = StructuralComparisons.StructuralComparer.Compare(CardApplications[cardIndex].ToByteArray(), cardApplication.ToByteArray()) == 0;
bool applicationOk = applicationSignatureOk && applicationContentOk;
if (!cardOk)
{
log.Trace("Card index {0} is corrupted.", cardIndex + 1);
error = true;
break;
}
if (!applicationOk)
{
log.Trace("Card application ID '{0}' for card index {1} is corrupted.", Crypto.ToHex(cardApplication.ApplicationId.ToByteArray()), cardIndex + 1);
error = true;
break;
}
cardsOk[cardIndex] = true;
}
}
else
{
log.Trace("Card ID '{0}' not recognized.", Crypto.ToHex(cardId));
error = true;
break;
}
}
foreach (int index in CardNumbers)
{
if (!cardsOk[index - 1])
{
log.Trace("Card index {0} not retrieved.", index);
error = true;
break;
}
}
bool res = !error;
log.Trace("(-):{0}", res);
return(res);
}
/// <summary>
/// Checks whether AddRelatedIdentityRequest request is valid.
/// </summary>
/// <param name="Client">Client that sent the request.</param>
/// <param name="AddRelatedIdentityRequest">Client's request message to validate.</param>
/// <param name="MessageBuilder">Client's network message builder.</param>
/// <param name="RequestMessage">Full request message from client.</param>
/// <param name="ErrorResponse">If the function fails, this is filled with error response message that is ready to be sent to the client.</param>
/// <returns>true if the profile update request can be applied, false otherwise.</returns>
public static bool ValidateAddRelatedIdentityRequest(IncomingClient Client, AddRelatedIdentityRequest AddRelatedIdentityRequest, PsMessageBuilder MessageBuilder, PsProtocolMessage RequestMessage, out PsProtocolMessage ErrorResponse)
{
log.Trace("()");
bool res = false;
ErrorResponse = null;
string details = null;
if (AddRelatedIdentityRequest == null)
{
AddRelatedIdentityRequest = new AddRelatedIdentityRequest();
}
if (AddRelatedIdentityRequest.CardApplication == null)
{
AddRelatedIdentityRequest.CardApplication = new CardApplicationInformation();
}
if (AddRelatedIdentityRequest.SignedCard == null)
{
AddRelatedIdentityRequest.SignedCard = new SignedRelationshipCard();
}
if (AddRelatedIdentityRequest.SignedCard.Card == null)
{
AddRelatedIdentityRequest.SignedCard.Card = new RelationshipCard();
}
CardApplicationInformation cardApplication = AddRelatedIdentityRequest.CardApplication;
SignedRelationshipCard signedCard = AddRelatedIdentityRequest.SignedCard;
RelationshipCard card = signedCard.Card;
byte[] applicationId = cardApplication.ApplicationId.ToByteArray();
byte[] cardId = card.CardId.ToByteArray();
if ((applicationId.Length == 0) || (applicationId.Length > RelatedIdentity.CardIdentifierLength))
{
log.Debug("Card application ID is invalid.");
details = "cardApplication.applicationId";
}
if (details == null)
{
byte[] appCardId = cardApplication.CardId.ToByteArray();
if (!ByteArrayComparer.Equals(cardId, appCardId))
{
log.Debug("Card IDs in application card and relationship card do not match.");
details = "cardApplication.cardId";
}
}
if (details == null)
{
if (card.ValidFrom > card.ValidTo)
{
log.Debug("Card validFrom field is greater than validTo field.");
details = "signedCard.card.validFrom";
}
else
{
DateTime?cardValidFrom = ProtocolHelper.UnixTimestampMsToDateTime(card.ValidFrom);
DateTime?cardValidTo = ProtocolHelper.UnixTimestampMsToDateTime(card.ValidTo);
if (cardValidFrom == null)
{
log.Debug("Card validFrom value '{0}' is not a valid timestamp.", card.ValidFrom);
details = "signedCard.card.validFrom";
}
else if (cardValidTo == null)
{
log.Debug("Card validTo value '{0}' is not a valid timestamp.", card.ValidTo);
details = "signedCard.card.validTo";
}
}
}
if (details == null)
{
byte[] issuerPublicKey = card.IssuerPublicKey.ToByteArray();
bool pubKeyValid = (0 < issuerPublicKey.Length) && (issuerPublicKey.Length <= ProtocolHelper.MaxPublicKeyLengthBytes);
if (!pubKeyValid)
{
log.Debug("Issuer public key has invalid length {0} bytes.", issuerPublicKey.Length);
details = "signedCard.card.issuerPublicKey";
}
}
if (details == null)
{
byte[] recipientPublicKey = card.RecipientPublicKey.ToByteArray();
if (!ByteArrayComparer.Equals(recipientPublicKey, Client.PublicKey))
{
log.Debug("Caller is not recipient of the card.");
details = "signedCard.card.recipientPublicKey";
}
}
if (details == null)
{
if (!Client.MessageBuilder.VerifySignedConversationRequestBodyPart(RequestMessage, cardApplication.ToByteArray(), Client.PublicKey))
{
log.Debug("Caller is not recipient of the card.");
ErrorResponse = Client.MessageBuilder.CreateErrorInvalidSignatureResponse(RequestMessage);
details = "";
}
}
if (details == null)
{
SemVer cardVersion = new SemVer(card.Version);
if (!cardVersion.Equals(SemVer.V100))
{
log.Debug("Card version is invalid or not supported.");
details = "signedCard.card.version";
}
}
if (details == null)
{
if (Encoding.UTF8.GetByteCount(card.Type) > PsMessageBuilder.MaxRelationshipCardTypeLengthBytes)
{
log.Debug("Card type is too long.");
details = "signedCard.card.type";
}
}
if (details == null)
{
RelationshipCard emptyIdCard = new RelationshipCard()
{
CardId = ProtocolHelper.ByteArrayToByteString(new byte[RelatedIdentity.CardIdentifierLength]),
Version = card.Version,
IssuerPublicKey = card.IssuerPublicKey,
RecipientPublicKey = card.RecipientPublicKey,
Type = card.Type,
ValidFrom = card.ValidFrom,
ValidTo = card.ValidTo
};
byte[] hash = Crypto.Sha256(emptyIdCard.ToByteArray());
if (!ByteArrayComparer.Equals(hash, cardId))
{
log.Debug("Card ID '{0}' does not match its hash '{1}'.", cardId.ToHex(64), hash.ToHex());
details = "signedCard.card.cardId";
}
}
if (details == null)
{
byte[] issuerSignature = signedCard.IssuerSignature.ToByteArray();
byte[] issuerPublicKey = card.IssuerPublicKey.ToByteArray();
if (!Ed25519.Verify(issuerSignature, cardId, issuerPublicKey))
{
log.Debug("Issuer signature is invalid.");
details = "signedCard.issuerSignature";
}
}
if (details == null)
{
res = true;
}
else
{
if (ErrorResponse == null)
{
ErrorResponse = MessageBuilder.CreateErrorInvalidValueResponse(RequestMessage, details);
}
}
log.Trace("(-):{0}", res);
return(res);
}