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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Bcpg.Sig
{
/**
* packet giving signature expiration time.
*/
public class Features
: SignatureSubpacket
{
/** Identifier for the Modification Detection (packets 18 and 19) */
public static readonly byte FEATURE_MODIFICATION_DETECTION = 0x01;
/** Identifier for the AEAD Encrypted Data Packet (packet 20) and version 5
Symmetric-Key Encrypted Session Key Packets (packet 3) */
public static readonly byte FEATURE_AEAD_ENCRYPTED_DATA = 0x02;
/** Identifier for the Version 5 Public-Key Packet format and corresponding new
fingerprint format */
public static readonly byte FEATURE_VERSION_5_PUBLIC_KEY = 0x04;
private static byte[] featureToByteArray(byte feature)
{
byte[] data = new byte[1];
data[0] = feature;
return data;
}
public Features(
bool critical,
bool isLongLength,
byte[] data): base(SignatureSubpacketTag.Features, critical, isLongLength, data)
{
}
public Features(bool critical, byte features): this(critical, false, featureToByteArray(features))
{
}
public Features(bool critical, int features): this(critical, false, featureToByteArray((byte)features))
{
}
/**
* Returns if modification detection is supported.
*/
public bool SupportsModificationDetection
{
get { return SupportsFeature(FEATURE_MODIFICATION_DETECTION); }
}
/**
* Returns if a particular feature is supported.
*/
public bool SupportsFeature(byte feature)
{
return (data[0] & feature) != 0;
}
}
}
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