/// <summary>
/// Reference https://github.com/hyperledger/aries-framework-dotnet/blob/master/src/Hyperledger.Aries.TestHarness/AgentScenarios.cs#L214
/// </summary>
private async Task CreatePresentation()
{
base.IsBusy = true;
var dialog = UserDialogs.Instance.Loading("Presenting Proof...");
try
{
var requestedCredentials = new RequestedCredentials();
var requestedAttributes = RequestedAttributes.Where(x => x.SelectedCredential != null && !x.IsPredicate)
.Select(y => new KeyValuePair <string, RequestedAttribute>(y.AttributeReferent, new RequestedAttribute
{
CredentialId = y.SelectedCredential.Credential.CredentialInfo.Referent,
Revealed = true
})
).ToDictionary(z => z.Key, z => z.Value);
//TODO: Implement Predicate related functionlity
if (requestedAttributes != null && requestedAttributes.Count > 0)
{
requestedCredentials.RequestedAttributes = requestedAttributes;
var context = await agentContextProvider.GetContextAsync();
if (requestPresentationMessage != null)
{
var result = await proofService.CreatePresentationAsync(context, requestPresentationMessage, requestedCredentials);
}
else
{
var(proofMsg, holderRecord) = await proofService.CreatePresentationAsync(context, proofRecord.Id, requestedCredentials);
await messageService.SendAsync(context, proofMsg, connection);
}
}
eventAggregator.Publish(new ApplicationEvent()
{
Type = ApplicationEventType.RefreshProofRequests
});
await NavigationService.NavigateBackAsync();
}
catch (Exception exception)
{
await Application.Current.MainPage.DisplayAlert("Error", exception.Message, "Ok");
}
finally
{
base.IsBusy = false;
dialog?.Hide();
dialog?.Dispose();
}
}
private async Task AcceptProofRequest()
{
if (_proofRecord.State != ProofState.Requested)
{
await DialogService.AlertAsync(string.Format(AppResources.ProofStateShouldBeMessage, ProofStateTranslator.Translate(ProofState.Requested)));
return;
}
RequestedCredentials requestedCredentials = new RequestedCredentials()
{
RequestedAttributes = new Dictionary <string, RequestedAttribute>(),
RequestedPredicates = new Dictionary <string, RequestedAttribute>()
};
foreach (ProofAttributeViewModel proofAttribute in Attributes)
{
if (proofAttribute.IsPredicate)
{
requestedCredentials.RequestedPredicates.Add(proofAttribute.Id, new RequestedAttribute {
CredentialId = proofAttribute.CredentialId, Revealed = proofAttribute.IsRevealed
});
}
else
{
requestedCredentials.RequestedAttributes.Add(proofAttribute.Id, new RequestedAttribute {
CredentialId = proofAttribute.CredentialId, Revealed = proofAttribute.IsRevealed
});
}
}
// TODO: Mettre le Timestamp à null car lorsqu'il est présent, la création de la preuve ne marche pas. Pourquoi?
//foreach (var keyValue in requestedCredentials.RequestedAttributes.Values)
//{
// keyValue.Timestamp = null;
//}
var context = await _agentContextProvider.GetContextAsync();
ProofRecord proofRecord = await _recordService.GetAsync <ProofRecord>(context.Wallet, _proofRecord.Id);
var(msg, rec) = await _proofService.CreatePresentationAsync(context, proofRecord.Id, requestedCredentials);
if (string.IsNullOrEmpty(proofRecord.ConnectionId))
{
await _messageService.SendAsync(context.Wallet, msg, proofRecord.GetTag("RecipientKey"), proofRecord.GetTag("ServiceEndpoint"));
}
else
{
ConnectionRecord connectionRecord = await _recordService.GetAsync <ConnectionRecord>(context.Wallet, proofRecord.ConnectionId);
await _messageService.SendAsync(context.Wallet, msg, connectionRecord);
}
_eventAggregator.Publish(new ApplicationEvent {
Type = ApplicationEventType.ProofRequestUpdated
});
await NavigationService.PopModalAsync();
}
public static async Task <(ProofRecord holderProofRecord, ProofRecord RequestorProofRecord)> ProofProtocolAsync(
IProofService proofService,
IProducerConsumerCollection <AgentMessage> messages,
ConnectionRecord holderConnection, ConnectionRecord requestorConnection,
IAgentContext holderContext,
IAgentContext requestorContext, ProofRequest proofRequestObject)
{
//Requestor sends a proof request
var(message, requestorProofRecord) = await proofService.CreateRequestAsync(requestorContext, proofRequestObject, requestorConnection.Id);
messages.TryAdd(message);
// Holder accepts the proof requests and builds a proof
var proofRequest = FindContentMessage <RequestPresentationMessage>(messages);
Assert.NotNull(proofRequest);
//Holder stores the proof request
var holderProofRequestRecord = await proofService.ProcessRequestAsync(holderContext, proofRequest, holderConnection);
var holderProofRecord = await proofService.GetAsync(holderContext, holderProofRequestRecord.Id);
var holderProofRequest = JsonConvert.DeserializeObject <ProofRequest>(holderProofRecord.RequestJson);
// Auto satify the proof with which ever credentials in the wallet are capable
var requestedCredentials =
await ProofServiceUtils.GetAutoRequestedCredentialsForProofCredentials(holderContext, proofService,
holderProofRequest);
//Holder accepts the proof request and sends a proof
(var proofMessage, _) = await proofService.CreatePresentationAsync(
holderContext,
holderProofRequestRecord.Id,
requestedCredentials);
messages.TryAdd(proofMessage);
//Requestor retrives proof message from their cloud agent
var proof = FindContentMessage <PresentationMessage>(messages);
Assert.NotNull(proof);
//Requestor stores proof
requestorProofRecord = await proofService.ProcessPresentationAsync(requestorContext, proof);
//Requestor verifies proof
var requestorVerifyResult = await proofService.VerifyProofAsync(requestorContext, requestorProofRecord.Id);
//Verify the proof is valid
Assert.True(requestorVerifyResult);
var requestorProofRecordResult = await proofService.GetAsync(requestorContext, requestorProofRecord.Id);
var holderProofRecordResult = await proofService.GetAsync(holderContext, holderProofRecord.Id);
return(holderProofRecordResult, requestorProofRecordResult);
}
private async Task AcceptProofRequest()
{
var loadingDialog = DialogService.Loading("Proccessing");
try
{
this.IsBusy = true;
var context = await _agentProvider.GetContextAsync();
var(message, proofRecord) = await _proofService.CreatePresentationAsync(context, ProofRequestRecord.Id, RequestedCredentials);
var connectionRecord = await _connectionService.GetAsync(context, proofRecord.ConnectionId);
await _messageService.SendAsync(context.Wallet, message, connectionRecord);
_eventAggregator.Publish(new ApplicationEvent()
{
Type = ApplicationEventType.NotificationUpdated
});
loadingDialog.Hide();
this.IsBusy = false;
await NavigationService.NavigateBackAsync();
var toastConfig = new ToastConfig("Accepted Proof!");
toastConfig.BackgroundColor = Color.Green;
toastConfig.Position = ToastPosition.Top;
toastConfig.SetDuration(3000);
DialogService.Toast(toastConfig);
}
catch (IndyException e)
{
this.IsBusy = false;
loadingDialog.Hide();
if (e.SdkErrorCode == 212)
{
DialogService.Alert("You don't have any suitable credential to present", "Error", "OK");
}
else
{
Console.WriteLine("Indy Error: " + e.Message);
DialogService.Alert("Some error with libindy. We're working on it", "Error", "OK");
}
}
catch (Exception e)
{
this.IsBusy = false;
loadingDialog.Hide();
Console.WriteLine("Error: " + e.Message);
DialogService.Alert("Error while accept Proof Request");
}
}
public async Task <IActionResult> SendProof(string proofRecordId)
{
var agentContext = await _agentProvider.GetContextAsync();
var proofRecord = await _proofService.GetAsync(agentContext, proofRecordId);
var connectionRecord = await _connectionService.GetAsync(agentContext, proofRecord.ConnectionId);
var request = JsonConvert.DeserializeObject <ProofRequest>(proofRecord.RequestJson);
var requestedCredentials = new RequestedCredentials();
foreach (var requestedAttribute in request.RequestedAttributes)
{
var credentials = await _proofService.ListCredentialsForProofRequestAsync(agentContext, request, requestedAttribute.Key);
requestedCredentials.RequestedAttributes.Add(requestedAttribute.Key,
new RequestedAttribute
{
CredentialId = credentials.First().CredentialInfo.Referent,
Revealed = true
});
}
foreach (var requestedAttribute in request.RequestedPredicates)
{
var credentials =
await _proofService.ListCredentialsForProofRequestAsync(agentContext, request,
requestedAttribute.Key);
requestedCredentials.RequestedPredicates.Add(requestedAttribute.Key,
new RequestedAttribute
{
CredentialId = credentials.First().CredentialInfo.Referent,
Revealed = false
});
}
var(proofMsg, record) = await _proofService.CreatePresentationAsync(agentContext, proofRecordId, requestedCredentials);
await _messageService.SendAsync(agentContext.Wallet, proofMsg, connectionRecord);
return(RedirectToAction("Index"));
}
public async Task <IActionResult> SendProofPresentationAsync(OperationBody body)
{
var context = await _agentContextProvider.GetContextAsync();
var threadId = body.Id;
var THPresentationExchange = _proofCache.Get <TestHarnessPresentationExchange>(threadId);
var requestedCredentialsJson = body.Data;
var requestedCredentials = requestedCredentialsJson.ToObject <RequestedCredentials>();
_logger.LogInformation("SendProofPresentation {requestedCredentials}", requestedCredentials.ToJson());
var(presentationMessage, proofRecord) = await _proofService.CreatePresentationAsync(context, THPresentationExchange.RecordId, requestedCredentials);
var connection = await _connectionService.GetAsync(context, proofRecord.ConnectionId);
THPresentationExchange.State = TestHarnessPresentationExchangeState.PresentationSent;
_logger.LogDebug("Send Presentation {presentationMessage}", presentationMessage.ToJson());
await _messageService.SendAsync(context, presentationMessage, connection);
return(Ok(THPresentationExchange));
}
public async Task ProcessProofInvalidState()
{
//Setup a connection and issue the credentials to the holder
var(issuerConnection, holderConnection) = await Scenarios.EstablishConnectionAsync(
_connectionService, _messages, _issuerWallet, _holderWallet);
await Scenarios.IssueCredentialAsync(
_schemaService, _credentialService, _messages, issuerConnection,
holderConnection, _issuerWallet, _holderWallet, await _holderWallet.Pool, TestConstants.DefaultMasterSecret, true, new List <CredentialPreviewAttribute>
{
new CredentialPreviewAttribute("first_name", "Test"),
new CredentialPreviewAttribute("last_name", "Holder")
});
_messages.Clear();
//Requestor initialize a connection with the holder
var(_, requestorConnection) = await Scenarios.EstablishConnectionAsync(
_connectionService, _messages, _holderWallet, _requestorWallet);
// Verifier sends a proof request to prover
{
var proofRequestObject = new ProofRequest
{
Name = "ProofReq",
Version = "1.0",
Nonce = await AnonCreds.GenerateNonceAsync(),
RequestedAttributes = new Dictionary <string, ProofAttributeInfo>
{
{ "first-name-requirement", new ProofAttributeInfo {
Name = "first_name"
} }
}
};
//Requestor sends a proof request
var(message, _) = await _proofService.CreateRequestAsync(_requestorWallet, proofRequestObject, requestorConnection.Id);
_messages.Add(message);
}
// Holder accepts the proof requests and builds a proof
{
//Holder retrives proof request message from their cloud agent
var proofRequest = FindContentMessage <RequestPresentationMessage>();
Assert.NotNull(proofRequest);
//Holder stores the proof request
var holderProofRequestId = await _proofService.ProcessRequestAsync(_holderWallet, proofRequest, holderConnection);
var holderProofRecord = await _proofService.GetAsync(_holderWallet, holderProofRequestId.Id);
var holderProofObject =
JsonConvert.DeserializeObject <ProofRequest>(holderProofRecord.RequestJson);
var requestedCredentials = new RequestedCredentials();
foreach (var requestedAttribute in holderProofObject.RequestedAttributes)
{
var credentials =
await _proofService.ListCredentialsForProofRequestAsync(_holderWallet, holderProofObject,
requestedAttribute.Key);
requestedCredentials.RequestedAttributes.Add(requestedAttribute.Key,
new RequestedAttribute
{
CredentialId = credentials.First().CredentialInfo.Referent,
Revealed = true
});
}
foreach (var requestedAttribute in holderProofObject.RequestedPredicates)
{
var credentials =
await _proofService.ListCredentialsForProofRequestAsync(_holderWallet, holderProofObject,
requestedAttribute.Key);
requestedCredentials.RequestedPredicates.Add(requestedAttribute.Key,
new RequestedAttribute
{
CredentialId = credentials.First().CredentialInfo.Referent,
Revealed = true
});
}
//Holder accepts the proof request and sends a proof
(var proofMessage, var _) = await _proofService.CreatePresentationAsync(_holderWallet, holderProofRequestId.Id,
requestedCredentials);
_messages.Add(proofMessage);
}
//Requestor retrives proof message from their cloud agent
var proof = FindContentMessage <PresentationMessage>();
Assert.NotNull(proof);
//Requestor stores proof
await _proofService.ProcessPresentationAsync(_requestorWallet, proof);
var ex = await Assert.ThrowsAsync <AriesFrameworkException>(async() => await _proofService.ProcessPresentationAsync(_requestorWallet, proof));
Assert.True(ex.ErrorCode == ErrorCode.RecordInInvalidState);
}
