/// <summary>
/// Initializes a new instance of the <see cref="PamTransaction"/> class.
/// </summary>
/// <param name="interop">The object implementing the PAM functions.</param>
/// <param name="handle">The handle of the PAM transaction.</param>
/// <param name="conversation">The conversation handler information.</param>
/// <param name="logger">The logger.</param>
public PamTransaction(
IPamInterop interop,
IntPtr handle,
PamConv conversation,
ILogger <PamService>?logger = null)
{
_conversation = _defaultConversation = conversation;
_delayCallback = DelayCallback;
_interop = interop;
_logger = logger;
_handle = handle;
}
/// <summary>
/// Gets the PAM error message.
/// </summary>
/// <param name="interop">The object implementing the PAM interface.</param>
/// <param name="handle">The PAM handle.</param>
/// <param name="status">The error status.</param>
/// <param name="caller">The PAM method (or library method which uses PAM method internally) that causes exception.</param>
/// <returns>The error message.</returns>
private static string?GetPamError(IPamInterop interop, IntPtr handle, PamStatus status, string?caller)
{
var result = interop.pam_strerror(handle, (int)status);
if (result == IntPtr.Zero)
{
caller ??= "unknown method";
var errorMessage = PamStatusHelper.TransformStatusToString(status, caller);
return($"{caller} fails with {errorMessage}");
}
return(Marshal.PtrToStringUTF8(result));
}
/// <summary>
/// Initializes a new instance of the <see cref="PamException"/> class.
/// </summary>
/// <param name="interop">The object implementing the PAM API.</param>
/// <param name="handle">The PAM handle.</param>
/// <param name="status">The error status.</param>
/// <param name="caller">The PAM method (or library method which uses PAM method internally) that causes exception.</param>
internal PamException(IPamInterop interop, IntPtr handle, PamStatus status, [CallerMemberName] string?caller = null)
: base(GetPamError(interop, handle, status, caller))
{
Status = status;
}
