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package org.bouncycastle.bcpg;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* basic packet for a PGP secret key
*/
public class SecretKeyPacket
extends ContainedPacket implements PublicKeyAlgorithmTags
{
public static final int USAGE_NONE = 0x00;
public static final int USAGE_CHECKSUM = 0xff;
public static final int USAGE_SHA1 = 0xfe;
private PublicKeyPacket pubKeyPacket;
private byte[] secKeyData;
private int s2kUsage;
private int encAlgorithm;
private S2K s2k;
private byte[] iv;
/**
*
* @param in
* @throws IOException
*/
SecretKeyPacket(
BCPGInputStream in)
throws IOException
{
if (this instanceof SecretSubkeyPacket)
{
pubKeyPacket = new PublicSubkeyPacket(in);
}
else
{
pubKeyPacket = new PublicKeyPacket(in);
}
s2kUsage = in.read();
if (s2kUsage == USAGE_CHECKSUM || s2kUsage == USAGE_SHA1)
{
encAlgorithm = in.read();
s2k = new S2K(in);
}
else
{
encAlgorithm = s2kUsage;
}
if (!(s2k != null && s2k.getType() == S2K.GNU_DUMMY_S2K && s2k.getProtectionMode() == 0x01))
{
if (s2kUsage != 0)
{
if (encAlgorithm < 7)
{
iv = new byte[8];
}
else
{
iv = new byte[16];
}
in.readFully(iv, 0, iv.length);
}
}
this.secKeyData = in.readAll();
}
/**
*
* @param pubKeyPacket
* @param encAlgorithm
* @param s2k
* @param iv
* @param secKeyData
*/
public SecretKeyPacket(
PublicKeyPacket pubKeyPacket,
int encAlgorithm,
S2K s2k,
byte[] iv,
byte[] secKeyData)
{
this.pubKeyPacket = pubKeyPacket;
this.encAlgorithm = encAlgorithm;
if (encAlgorithm != SymmetricKeyAlgorithmTags.NULL)
{
this.s2kUsage = USAGE_CHECKSUM;
}
else
{
this.s2kUsage = USAGE_NONE;
}
this.s2k = s2k;
this.iv = iv;
this.secKeyData = secKeyData;
}
public SecretKeyPacket(
PublicKeyPacket pubKeyPacket,
int encAlgorithm,
int s2kUsage,
S2K s2k,
byte[] iv,
byte[] secKeyData)
{
this.pubKeyPacket = pubKeyPacket;
this.encAlgorithm = encAlgorithm;
this.s2kUsage = s2kUsage;
this.s2k = s2k;
this.iv = iv;
this.secKeyData = secKeyData;
}
public int getEncAlgorithm()
{
return encAlgorithm;
}
public int getS2KUsage()
{
return s2kUsage;
}
public byte[] getIV()
{
return iv;
}
public S2K getS2K()
{
return s2k;
}
public PublicKeyPacket getPublicKeyPacket()
{
return pubKeyPacket;
}
public byte[] getSecretKeyData()
{
return secKeyData;
}
public byte[] getEncodedContents()
throws IOException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
BCPGOutputStream pOut = new BCPGOutputStream(bOut);
pOut.write(pubKeyPacket.getEncodedContents());
pOut.write(s2kUsage);
if (s2kUsage == USAGE_CHECKSUM || s2kUsage == USAGE_SHA1)
{
pOut.write(encAlgorithm);
pOut.writeObject(s2k);
}
if (iv != null)
{
pOut.write(iv);
}
if (secKeyData != null && secKeyData.length > 0)
{
pOut.write(secKeyData);
}
return bOut.toByteArray();
}
public void encode(
BCPGOutputStream out)
throws IOException
{
out.writePacket(SECRET_KEY, getEncodedContents(), true);
}
}
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