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//-----------------------------------------------------------------------
// <copyright file="VerificationCodeFormat.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OAuth {
using System.Diagnostics.CodeAnalysis;
/// <summary>
/// The different formats a user authorization verifier code can take
/// in order to be as secure as possible while being compatible with
/// the type of OAuth Consumer requesting access.
/// </summary>
/// <remarks>
/// Some Consumers may be set-top boxes, video games, mobile devies, etc.
/// with very limited character entry support and no ability to receive
/// a callback URI. OAuth 1.0a requires that these devices operators
/// must manually key in a verifier code, so in these cases it better
/// be possible to do so given the input options on that device.
/// </remarks>
public enum VerificationCodeFormat {
/// <summary>
/// The strongest verification code.
/// The best option for web consumers since a callback is usually an option.
/// </summary>
IncludedInCallback,
/// <summary>
/// A combination of upper and lowercase letters and numbers may be used,
/// allowing a computer operator to easily read from the screen and key
/// in the verification code.
/// </summary>
/// <remarks>
/// Some letters and numbers will be skipped where they are visually similar
/// enough that they can be difficult to distinguish when displayed with most fonts.
/// </remarks>
[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Alikes", Justification = "Breaking change of existing API")]
[SuppressMessage("Microsoft.Naming", "CA1702:CompoundWordsShouldBeCasedCorrectly", MessageId = "AlphaNumeric", Justification = "Breaking change of existing API")]
[SuppressMessage("Microsoft.Naming", "CA1702:CompoundWordsShouldBeCasedCorrectly", MessageId = "LookAlikes", Justification = "Breaking change of existing API")]
AlphaNumericNoLookAlikes,
/// <summary>
/// Only uppercase letters will be used in the verification code.
/// Verification codes are case-sensitive, so consumers with fixed
/// keyboards with only one character case option may require this option.
/// </summary>
AlphaUpper,
/// <summary>
/// Only lowercase letters will be used in the verification code.
/// Verification codes are case-sensitive, so consumers with fixed
/// keyboards with only one character case option may require this option.
/// </summary>
AlphaLower,
/// <summary>
/// Only the numbers 0-9 will be used in the verification code.
/// Must useful for consumers running on mobile phone devices.
/// </summary>
Numeric,
}
}
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