public static Credential CredentialPrompt(Program program, TargetUri targetUri, string titleMessage)
{
// ReadConsole 32768 fail, 32767 OK @linquize [https://github.com/Microsoft/Git-Credential-Manager-for-Windows/commit/a62b9a19f430d038dcd85a610d97e5f763980f85]
const int BufferReadSize = 16 * 1024;
if (program is null)
{
throw new ArgumentNullException(nameof(program));
}
if (targetUri is null)
{
throw new ArgumentNullException(nameof(targetUri));
}
titleMessage = titleMessage ?? "Please enter your credentials for ";
StringBuilder buffer = new StringBuilder(BufferReadSize);
uint read = 0;
uint written = 0;
NativeMethods.ConsoleMode consoleMode = 0;
NativeMethods.FileAccess fileAccessFlags = NativeMethods.FileAccess.GenericRead | NativeMethods.FileAccess.GenericWrite;
NativeMethods.FileAttributes fileAttributes = NativeMethods.FileAttributes.Normal;
NativeMethods.FileCreationDisposition fileCreationDisposition = NativeMethods.FileCreationDisposition.OpenExisting;
NativeMethods.FileShare fileShareFlags = NativeMethods.FileShare.Read | NativeMethods.FileShare.Write;
using (SafeFileHandle stdout = NativeMethods.CreateFile(NativeMethods.ConsoleOutName, fileAccessFlags, fileShareFlags, IntPtr.Zero, fileCreationDisposition, fileAttributes, IntPtr.Zero))
using (SafeFileHandle stdin = NativeMethods.CreateFile(NativeMethods.ConsoleInName, fileAccessFlags, fileShareFlags, IntPtr.Zero, fileCreationDisposition, fileAttributes, IntPtr.Zero))
{
// Read the current console mode.
if (stdin.IsInvalid || stdout.IsInvalid)
{
program.Trace.WriteLine("not a tty detected, abandoning prompt.");
return(null);
}
else if (!NativeMethods.GetConsoleMode(stdin, out consoleMode))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to determine console mode (" + NativeMethods.Win32Error.GetText(error) + ").");
}
program.Trace.WriteLine($"console mode = '{consoleMode}'.");
string username = null;
string password = null;
// Instruct the user as to what they are expected to do.
buffer.Append(titleMessage)
.Append(targetUri)
.AppendLine();
if (!NativeMethods.WriteConsole(stdout, buffer, (uint)buffer.Length, out written, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to write to standard output (" + NativeMethods.Win32Error.GetText(error) + ").");
}
// Clear the buffer for the next operation.
buffer.Clear();
// Prompt the user for the username wanted.
buffer.Append("username: "******"Unable to write to standard output (" + NativeMethods.Win32Error.GetText(error) + ").");
}
// Clear the buffer for the next operation.
buffer.Clear();
// Read input from the user.
if (!NativeMethods.ReadConsole(stdin, buffer, BufferReadSize, out read, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to read from standard input (" + NativeMethods.Win32Error.GetText(error) + ").");
}
// Record input from the user into local storage, stripping any EOL chars.
username = buffer.ToString(0, (int)read);
username = username.Trim(program.Settings.NewLine.ToCharArray());
// Clear the buffer for the next operation.
buffer.Clear();
// Set the console mode to current without echo input.
NativeMethods.ConsoleMode consoleMode2 = consoleMode ^ NativeMethods.ConsoleMode.EchoInput;
try
{
if (!NativeMethods.SetConsoleMode(stdin, consoleMode2))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to set console mode (" + NativeMethods.Win32Error.GetText(error) + ").");
}
program.Trace.WriteLine($"console mode = '{(consoleMode2 & NativeMethods.ConsoleMode.AllFlags)}'.");
// Prompt the user for password.
buffer.Append("password: "******"Unable to write to standard output (" + NativeMethods.Win32Error.GetText(error) + ").");
}
// Clear the buffer for the next operation.
buffer.Clear();
// Read input from the user.
if (!NativeMethods.ReadConsole(stdin, buffer, BufferReadSize, out read, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to read from standard input (" + NativeMethods.Win32Error.GetText(error) + ").");
}
// Record input from the user into local storage, stripping any EOL chars.
password = buffer.ToString(0, (int)read);
password = password.Trim(program.Settings.NewLine.ToCharArray());
}
finally
{
// Restore the console mode to its original value.
NativeMethods.SetConsoleMode(stdin, consoleMode);
program.Trace.WriteLine($"console mode = '{consoleMode}'.");
}
if (username != null && password != null)
{
return(new Credential(username, password));
}
}
return(null);
}
/// <summary>
/// <para></para>
/// <para>Tokens acquired are stored in the secure secret store provided during
/// initialization.</para>
/// </summary>
/// <param name="targetUri">The unique identifier for the resource for which access is to
/// be acquired.</param>
/// <param name="credentials">(out) Credentials when acquision is successful; null otherwise.</param>
/// <returns>True if success; otherwise false.</returns>
public bool InteractiveLogon(Uri targetUri, out Credential credentials)
{
// ReadConsole 32768 fail, 32767 ok
// @linquize [https://github.com/Microsoft/Git-Credential-Manager-for-Windows/commit/a62b9a19f430d038dcd85a610d97e5f763980f85]
const int BufferReadSize = 32 * 1024 - 7;
StringBuilder buffer = new StringBuilder(BufferReadSize);
uint read = 0;
uint written = 0;
NativeMethods.FileAccess fileAccessFlags = NativeMethods.FileAccess.GenericRead | NativeMethods.FileAccess.GenericWrite;
NativeMethods.FileAttributes fileAttributes = NativeMethods.FileAttributes.Normal;
NativeMethods.FileCreationDisposition fileCreationDisposition = NativeMethods.FileCreationDisposition.OpenExisting;
NativeMethods.FileShare fileShareFlags = NativeMethods.FileShare.Read | NativeMethods.FileShare.Write;
using (SafeFileHandle stdout = NativeMethods.CreateFile("CONOUT$", fileAccessFlags, fileShareFlags, IntPtr.Zero, fileCreationDisposition, fileAttributes, IntPtr.Zero))
using (SafeFileHandle stdin = NativeMethods.CreateFile("CONIN$", fileAccessFlags, fileShareFlags, IntPtr.Zero, fileCreationDisposition, fileAttributes, IntPtr.Zero))
{
// read the current console mode
NativeMethods.ConsoleMode consoleMode;
if (!NativeMethods.GetConsoleMode(stdin, out consoleMode))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to determine console mode (" + error + ").");
}
// instruct the user as to what they are expected to do
buffer.Append("Please enter your GitHub credentials for ")
.Append(targetUri.Scheme)
.Append("://")
.Append(targetUri.DnsSafeHost)
.Append("/")
.Append(targetUri.PathAndQuery)
.AppendLine();
if (!NativeMethods.WriteConsole(stdout, buffer, (uint)buffer.Length, out written, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to write to standard output (" + error + ").");
}
// clear the buffer for the next operation
buffer.Clear();
// prompt the user for the username wanted
buffer.Append("username: "******"Unable to write to standard output (" + error + ").");
}
// clear the buffer for the next operation
buffer.Clear();
// read input from the user
if (!NativeMethods.ReadConsole(stdin, buffer, BufferReadSize, out read, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to read from standard input (" + error + ").");
}
// record input from the user into local storage, stripping any eol chars
string username = buffer.ToString(0, (int)read);
username = username.Trim(Environment.NewLine.ToCharArray());
// clear the buffer for the next operation
buffer.Clear();
// set the console mode to current without echo input
NativeMethods.ConsoleMode consoleMode2 = consoleMode ^ NativeMethods.ConsoleMode.EchoInput;
if (!NativeMethods.SetConsoleMode(stdin, consoleMode2))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to set console mode (" + error + ").");
}
// prompt the user for password
buffer.Append("password: "******"Unable to write to standard output (" + error + ").");
}
// clear the buffer for the next operation
buffer.Clear();
// read input from the user
if (!NativeMethods.ReadConsole(stdin, buffer, BufferReadSize, out read, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to read from standard input (" + error + ").");
}
// record input from the user into local storage, stripping any eol chars
string password = buffer.ToString(0, (int)read);
password = password.Trim(Environment.NewLine.ToCharArray());
// clear the buffer for the next operation
buffer.Clear();
// restore the console mode to its original value
if (!NativeMethods.SetConsoleMode(stdin, consoleMode))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to set console mode (" + error + ").");
}
GithubAuthenticationResult result;
if (result = GithubAuthority.AcquireToken(targetUri, username, password, null, this.TokenScope).Result)
{
Trace.WriteLine(" token aquisition succeeded");
credentials = (Credential)result.Token;
this.PersonalAccessTokenStore.WriteCredentials(targetUri, credentials);
return(true);
}
else if (result == GithubAuthenticationResultType.TwoFactorApp ||
result == GithubAuthenticationResultType.TwoFactorSms)
{
buffer.Clear()
.AppendLine()
.Append("authcode: ");
if (!NativeMethods.WriteConsole(stdout, buffer, (uint)buffer.Length, out written, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to write to standard output (" + error + ").");
}
buffer.Clear();
// read input from the user
if (!NativeMethods.ReadConsole(stdin, buffer, BufferReadSize, out read, IntPtr.Zero))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Unable to read from standard input (" + error + ").");
}
string authenticationCode = buffer.ToString(0, (int)read);
authenticationCode = authenticationCode.Trim(Environment.NewLine.ToCharArray());
if (result = GithubAuthority.AcquireToken(targetUri, username, password, authenticationCode, this.TokenScope).Result)
{
Trace.WriteLine(" token aquisition succeeded");
credentials = (Credential)result.Token;
this.PersonalAccessTokenStore.WriteCredentials(targetUri, credentials);
return(true);
}
}
}
Trace.WriteLine(" interactive logon failed");
credentials = null;
return(false);
}