/// <summary>
/// Call the plugin credential provider application to acquire credentials.
/// The request will be passed to the plugin on standard input as a json serialized
/// PluginCredentialRequest.
/// The plugin will return credentials as a json serialized PluginCredentialResponse.
/// Valid credentials will be returned, or null if the provide cannot provide credentials
/// for the given request. If the plugin returns an Abort message, an exception will be thrown to
/// fail the current request.
/// </summary>
/// <param name="uri">The uri of a web resource for which credentials are needed.</param>
/// <param name="proxy">Ignored. Proxy information will not be passed to plugins.</param>
/// <param name="type">
/// The type of credential request that is being made. Note that this implementation of
/// <see cref="ICredentialProvider"/> does not support providing proxy credenitials and treats
/// all other types the same.
/// </param>
/// <param name="isRetry">If true, credentials were previously supplied by this
/// provider for the same uri.</param>
/// <param name="message">A message provided by NuGet to show to the user when prompting.</param>
/// <param name="nonInteractive">If true, the plugin must not prompt for credentials.</param>
/// <param name="cancellationToken">A cancellation token.</param>
/// <returns>A credential object. If </returns>
public Task <CredentialResponse> GetAsync(
Uri uri,
IWebProxy proxy,
CredentialRequestType type,
string message,
bool isRetry,
bool nonInteractive,
CancellationToken cancellationToken)
{
CredentialResponse taskResponse;
if (type == CredentialRequestType.Proxy)
{
taskResponse = new CredentialResponse(CredentialStatus.ProviderNotApplicable);
return(Task.FromResult(taskResponse));
}
try
{
var request = new PluginCredentialRequest
{
Uri = uri.ToString(),
IsRetry = isRetry,
NonInteractive = nonInteractive
};
// TODO: Extend the plug protocol to pass in the credential request type.
var response = Execute(request, cancellationToken);
if (response.IsValid)
{
ICredentials result = new NetworkCredential(response.Username, response.Password);
if (response.AuthTypes != null)
{
result = new AuthTypeFilteredCredentials(result, response.AuthTypes);
}
taskResponse = new CredentialResponse(result);
}
else
{
taskResponse = new CredentialResponse(CredentialStatus.ProviderNotApplicable);
}
}
catch (OperationCanceledException)
{
throw;
}
catch (PluginException)
{
throw;
}
catch (Exception e)
{
throw PluginException.Create(Path, e);
}
return(Task.FromResult(taskResponse));
}
public virtual PluginCredentialResponse Execute(PluginCredentialRequest request,
CancellationToken cancellationToken)
{
var stdOut = new StringBuilder();
var stdError = new StringBuilder();
var argumentString =
$"-uri {request.Uri}"
+ (request.IsRetry ? " -isRetry" : string.Empty)
+ (request.NonInteractive ? " -nonInteractive" : string.Empty);
var startInfo = new ProcessStartInfo
{
FileName = Path,
Arguments = argumentString,
WindowStyle = ProcessWindowStyle.Hidden,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
StandardOutputEncoding = Encoding.UTF8,
StandardErrorEncoding = Encoding.UTF8,
ErrorDialog = false
};
cancellationToken.ThrowIfCancellationRequested();
var process = Process.Start(startInfo);
if (process == null)
{
throw PluginException.CreateNotStartedMessage(Path);
}
process.OutputDataReceived += (object o, DataReceivedEventArgs e) => { stdOut.AppendLine(e.Data); };
process.ErrorDataReceived += (object o, DataReceivedEventArgs e) => { stdError.AppendLine(e.Data); };
process.BeginOutputReadLine();
process.BeginErrorReadLine();
using (cancellationToken.Register(() => Kill(process)))
{
if (!process.WaitForExit(TimeoutSeconds * 1000))
{
Kill(process);
throw PluginException.CreateTimeoutMessage(Path, TimeoutSeconds);
}
// Give time for the Async event handlers to finish by calling WaitForExit again.
// if the first one succeeded
// Note: Read remarks from https://msdn.microsoft.com/en-us/library/ty0d8k56(v=vs.110).aspx
// for reason.
process.WaitForExit();
}
process.CancelErrorRead();
process.CancelOutputRead();
var exitCode = process.ExitCode;
if (Enum.GetValues(typeof(PluginCredentialResponseExitCode)).Cast <int>().Contains(exitCode))
{
var status = (PluginCredentialResponseExitCode)exitCode;
var responseJson = stdOut.ToString();
PluginCredentialResponse credentialResponse;
try
{
credentialResponse = JsonConvert.DeserializeObject <PluginCredentialResponse>(responseJson);
}
catch (Exception)
{
throw PluginException.CreatePayloadExceptionMessage(Path, status, responseJson);
}
switch (status)
{
case PluginCredentialResponseExitCode.Success:
if (!credentialResponse.IsValid)
{
throw PluginException.CreatePayloadExceptionMessage(Path, status, responseJson);
}
return(credentialResponse);
case PluginCredentialResponseExitCode.ProviderNotApplicable:
credentialResponse.Username = null;
credentialResponse.Password = null;
return(credentialResponse);
case PluginCredentialResponseExitCode.Failure:
throw PluginException.CreateAbortMessage(Path, credentialResponse.Message);
}
}
throw PluginException.CreateWrappedExceptionMessage(
Path,
exitCode,
stdOut.ToString(),
stdError.ToString());
}
/// <summary>
/// Call the plugin credential provider application to acquire credentials.
/// The request will be passed to the plugin on standard input as a json serialized
/// PluginCredentialRequest.
/// The plugin will return credentials as a json serialized PluginCredentialResponse.
/// Valid credentials will be returned, or null if the provide cannot provide credentials
/// for the given request. If the plugin returns an Abort message, an exception will be thrown to
/// fail the current request.
/// </summary>
/// <param name="uri">The uri of a web resource for which credentials are needed.</param>
/// <param name="proxy">Ignored. Proxy information will not be passed to plugins.</param>
/// <param name="type">
/// The type of credential request that is being made. Note that this implementation of
/// <see cref="ICredentialProvider"/> does not support providing proxy credenitials and treats
/// all other types the same.
/// </param>
/// <param name="isRetry">If true, credentials were previously supplied by this
/// provider for the same uri.</param>
/// <param name="message">A message provided by NuGet to show to the user when prompting.</param>
/// <param name="nonInteractive">If true, the plugin must not prompt for credentials.</param>
/// <param name="cancellationToken">A cancellation token.</param>
/// <returns>A credential object.</returns>
public Task <CredentialResponse> GetAsync(
Uri uri,
IWebProxy proxy,
CredentialRequestType type,
string message,
bool isRetry,
bool nonInteractive,
CancellationToken cancellationToken)
{
CredentialResponse taskResponse;
if (type == CredentialRequestType.Proxy)
{
taskResponse = new CredentialResponse(CredentialStatus.ProviderNotApplicable);
return(Task.FromResult(taskResponse));
}
try
{
var request = new PluginCredentialRequest
{
Uri = uri.AbsoluteUri,
IsRetry = isRetry,
NonInteractive = nonInteractive,
Verbosity = _verbosity
};
PluginCredentialResponse response;
if (Interlocked.CompareExchange(ref _deprecationMessageWarningLogged, 1, 0) == 0)
{
_logger.LogWarning(string.Format(CultureInfo.CurrentCulture, Resources.PluginWarning_PluginIsBeingDeprecated, Path, CrossPlatformPluginLink));
}
try
{
response = GetPluginResponse(request, cancellationToken);
}
catch (PluginUnexpectedStatusException) when(PassVerbosityFlag(request))
{
// older providers may throw if the verbosity flag is sent,
// so retry without it
request.Verbosity = null;
response = GetPluginResponse(request, cancellationToken);
}
if (response.IsValid)
{
var result = new AuthTypeFilteredCredentials(
new NetworkCredential(response.Username, response.Password),
response.AuthTypes ?? Enumerable.Empty <string>());
taskResponse = new CredentialResponse(result);
}
else
{
taskResponse = new CredentialResponse(CredentialStatus.ProviderNotApplicable);
}
}
catch (OperationCanceledException)
{
throw;
}
catch (PluginException)
{
throw;
}
catch (Exception e)
{
throw PluginException.Create(Path, e);
}
return(Task.FromResult(taskResponse));
}
private bool PassVerbosityFlag(PluginCredentialRequest request)
{
return(request.Verbosity != null &&
!string.Equals(request.Verbosity, NormalVerbosity, StringComparison.OrdinalIgnoreCase));
}
private PluginCredentialResponse GetPluginResponse(PluginCredentialRequest request,
CancellationToken cancellationToken)
{
var argumentString =
$"-uri {request.Uri}"
+ (request.IsRetry ? " -isRetry" : string.Empty)
+ (request.NonInteractive ? " -nonInteractive" : string.Empty);
// only apply -verbosity flag if set and != Normal
// since normal is default
if (PassVerbosityFlag(request))
{
argumentString += $" -verbosity {request.Verbosity.ToLower()}";
}
var startInfo = new ProcessStartInfo
{
FileName = Path,
Arguments = argumentString,
#if IS_DESKTOP
WindowStyle = ProcessWindowStyle.Hidden,
ErrorDialog = false,
#endif
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
StandardOutputEncoding = Encoding.UTF8,
StandardErrorEncoding = Encoding.UTF8,
};
string stdOut = null;
var exitCode = Execute(startInfo, cancellationToken, out stdOut);
var status = (PluginCredentialResponseExitCode)exitCode;
PluginCredentialResponse credentialResponse;
try
{
// Mono will add utf-16 byte order mark to the start of stdOut, remove it here.
credentialResponse =
JsonConvert.DeserializeObject <PluginCredentialResponse>(stdOut.Trim(new char[] { '\uFEFF' }))
?? new PluginCredentialResponse();
}
catch (Exception)
{
// Do not expose stdout message, since it may contain credentials
throw PluginException.CreateUnreadableResponseExceptionMessage(Path, status);
}
switch (status)
{
case PluginCredentialResponseExitCode.Success:
if (!credentialResponse.IsValid)
{
throw PluginException.CreateInvalidResponseExceptionMessage(
Path,
status,
credentialResponse);
}
return(credentialResponse);
case PluginCredentialResponseExitCode.ProviderNotApplicable:
credentialResponse.Username = null;
credentialResponse.Password = null;
return(credentialResponse);
case PluginCredentialResponseExitCode.Failure:
throw PluginException.CreateAbortMessage(Path, credentialResponse.Message);
default:
throw PluginUnexpectedStatusException.CreateUnexpectedStatusMessage(Path, status);
}
}
/// <summary>
/// Call the plugin credential provider application to acquire credentials.
/// The request will be passed to the plugin on standard input as a json serialized
/// PluginCredentialRequest.
/// The plugin will return credentials as a json serialized PluginCredentialResponse.
/// Valid credentials will be returned, or null if the provide cannot provide credentials
/// for the given request. If the plugin returns an Abort message, an exception will be thrown to
/// fail the current request.
/// </summary>
/// <param name="uri">The uri of a web resource for which credentials are needed.</param>
/// <param name="proxy">Ignored. Proxy information will not be passed to plugins.</param>
/// <param name="type">
/// The type of credential request that is being made. Note that this implementation of
/// <see cref="ICredentialProvider"/> does not support providing proxy credenitials and treats
/// all other types the same.
/// </param>
/// <param name="isRetry">If true, credentials were previously supplied by this
/// provider for the same uri.</param>
/// <param name="message">A message provided by NuGet to show to the user when prompting.</param>
/// <param name="nonInteractive">If true, the plugin must not prompt for credentials.</param>
/// <param name="cancellationToken">A cancellation token.</param>
/// <returns>A credential object. If </returns>
public Task <CredentialResponse> GetAsync(
Uri uri,
IWebProxy proxy,
CredentialRequestType type,
string message,
bool isRetry,
bool nonInteractive,
CancellationToken cancellationToken)
{
CredentialResponse taskResponse;
if (type == CredentialRequestType.Proxy)
{
taskResponse = new CredentialResponse(CredentialStatus.ProviderNotApplicable);
return(Task.FromResult(taskResponse));
}
try
{
var request = new PluginCredentialRequest
{
Uri = uri.AbsoluteUri,
IsRetry = isRetry,
NonInteractive = nonInteractive,
Verbosity = _verbosity
};
PluginCredentialResponse response;
// TODO: Extend the plug protocol to pass in the credential request type.
try
{
response = GetPluginResponse(request, cancellationToken);
}
catch (PluginUnexpectedStatusException) when(PassVerbosityFlag(request))
{
// older providers may throw if the verbosity flag is sent,
// so retry without it
request.Verbosity = null;
response = GetPluginResponse(request, cancellationToken);
}
if (response.IsValid)
{
ICredentials result = new NetworkCredential(response.Username, response.Password);
if (response.AuthTypes != null)
{
result = new AuthTypeFilteredCredentials(result, response.AuthTypes);
}
taskResponse = new CredentialResponse(result);
}
else
{
taskResponse = new CredentialResponse(CredentialStatus.ProviderNotApplicable);
}
}
catch (OperationCanceledException)
{
throw;
}
catch (PluginException)
{
throw;
}
catch (Exception e)
{
throw PluginException.Create(Path, e);
}
return(Task.FromResult(taskResponse));
}
