/// <summary>Return the next object in the stream, or null if the end is reached.</summary>
/// <exception cref="IOException">On a parse error</exception>
public PgpObject NextPgpObject()
{
PacketTag tag = bcpgIn.NextPacketTag();
if ((int) tag == -1) return null;
switch (tag)
{
case PacketTag.Signature:
{
IList l = Platform.CreateArrayList();
while (bcpgIn.NextPacketTag() == PacketTag.Signature)
{
try
{
l.Add(new PgpSignature(bcpgIn));
}
catch (PgpException e)
{
throw new IOException("can't create signature object: " + e);
}
}
PgpSignature[] sigs = new PgpSignature[l.Count];
for (int i = 0; i < l.Count; ++i)
{
sigs[i] = (PgpSignature)l[i];
}
return new PgpSignatureList(sigs);
}
case PacketTag.SecretKey:
try
{
return new PgpSecretKeyRing(bcpgIn);
}
catch (PgpException e)
{
throw new IOException("can't create secret key object: " + e);
}
case PacketTag.PublicKey:
return new PgpPublicKeyRing(bcpgIn);
// TODO Make PgpPublicKey a PgpObject or return a PgpPublicKeyRing
// case PacketTag.PublicSubkey:
// return PgpPublicKeyRing.ReadSubkey(bcpgIn);
case PacketTag.CompressedData:
return new PgpCompressedData(bcpgIn);
case PacketTag.LiteralData:
return new PgpLiteralData(bcpgIn);
case PacketTag.PublicKeyEncryptedSession:
case PacketTag.SymmetricKeyEncryptedSessionKey:
return new PgpEncryptedDataList(bcpgIn);
case PacketTag.OnePassSignature:
{
IList l = Platform.CreateArrayList();
while (bcpgIn.NextPacketTag() == PacketTag.OnePassSignature)
{
try
{
l.Add(new PgpOnePassSignature(bcpgIn));
}
catch (PgpException e)
{
throw new IOException("can't create one pass signature object: " + e);
}
}
PgpOnePassSignature[] sigs = new PgpOnePassSignature[l.Count];
for (int i = 0; i < l.Count; ++i)
{
sigs[i] = (PgpOnePassSignature)l[i];
}
return new PgpOnePassSignatureList(sigs);
}
case PacketTag.Marker:
return new PgpMarker(bcpgIn);
case PacketTag.Experimental1:
case PacketTag.Experimental2:
case PacketTag.Experimental3:
case PacketTag.Experimental4:
return new PgpExperimental(bcpgIn);
}
throw new IOException("unknown object in stream " + bcpgIn.NextPacketTag());
}
/// <summary>Verify the calculated signature against the passed in PgpSignature.</summary>
public bool Verify(
PgpSignature pgpSig)
{
byte[] trailer = pgpSig.GetSignatureTrailer();
sig.BlockUpdate(trailer, 0, trailer.Length);
return sig.VerifySignature(pgpSig.GetSignature());
}
public void SetEmbeddedSignature(
bool isCritical,
PgpSignature pgpSignature)
{
byte[] sig = pgpSignature.GetEncoded();
byte[] data;
// TODO Should be >= ?
if (sig.Length - 1 > 256)
{
data = new byte[sig.Length - 3];
}
else
{
data = new byte[sig.Length - 2];
}
Array.Copy(sig, sig.Length - data.Length, data, 0, data.Length);
list.Add(new EmbeddedSignature(isCritical, data));
}
/// <summary>Add a revocation or some other key certification to a key.</summary>
/// <param name="key">The key the revocation is to be added to.</param>
/// <param name="certification">The key signature to be added.</param>
/// <returns>The new changed public key object.</returns>
public static PgpPublicKey AddCertification(
PgpPublicKey key,
PgpSignature certification)
{
if (key.IsMasterKey)
{
if (certification.SignatureType == PgpSignature.SubkeyRevocation)
{
throw new ArgumentException("signature type incorrect for master key revocation.");
}
}
else
{
if (certification.SignatureType == PgpSignature.KeyRevocation)
{
throw new ArgumentException("signature type incorrect for sub-key revocation.");
}
}
PgpPublicKey returnKey = new PgpPublicKey(key);
if (returnKey.subSigs != null)
{
returnKey.subSigs.Add(certification);
}
else
{
returnKey.keySigs.Add(certification);
}
return returnKey;
}
/// <summary>Remove a certification from the key.</summary>
/// <param name="key">The key the certifications are to be removed from.</param>
/// <param name="certification">The certfication to be removed.</param>
/// <returns>The modified key, null if the certification was not found.</returns>
public static PgpPublicKey RemoveCertification(
PgpPublicKey key,
PgpSignature certification)
{
PgpPublicKey returnKey = new PgpPublicKey(key);
IList sigs = returnKey.subSigs != null
? returnKey.subSigs
: returnKey.keySigs;
// bool found = sigs.Remove(certification);
int pos = sigs.IndexOf(certification);
bool found = pos >= 0;
if (found)
{
sigs.RemoveAt(pos);
}
else
{
foreach (String id in key.GetUserIds())
{
foreach (object sig in key.GetSignaturesForId(id))
{
// TODO Is this the right type of equality test?
if (certification == sig)
{
found = true;
returnKey = PgpPublicKey.RemoveCertification(returnKey, id, certification);
}
}
}
if (!found)
{
foreach (PgpUserAttributeSubpacketVector id in key.GetUserAttributes())
{
foreach (object sig in key.GetSignaturesForUserAttribute(id))
{
// TODO Is this the right type of equality test?
if (certification == sig)
{
found = true;
returnKey = PgpPublicKey.RemoveCertification(returnKey, id, certification);
}
}
}
}
}
return returnKey;
}
/// <summary>Remove a certification associated with a given user attributes on a key.</summary>
/// <param name="key">The key the certifications are to be removed from.</param>
/// <param name="userAttributes">The user attributes that the certfication is to be removed from.</param>
/// <param name="certification">The certification to be removed.</param>
/// <returns>The re-certified key, or null if the certification was not found.</returns>
public static PgpPublicKey RemoveCertification(
PgpPublicKey key,
PgpUserAttributeSubpacketVector userAttributes,
PgpSignature certification)
{
return RemoveCert(key, userAttributes, certification);
}
private static PgpPublicKey RemoveCert(
PgpPublicKey key,
object id,
PgpSignature certification)
{
PgpPublicKey returnKey = new PgpPublicKey(key);
bool found = false;
for (int i = 0; i < returnKey.ids.Count; i++)
{
if (id.Equals(returnKey.ids[i]))
{
IList certs = (IList) returnKey.idSigs[i];
found = certs.Contains(certification);
if (found)
{
certs.Remove(certification);
}
}
}
return found ? returnKey : null;
}
/// <summary>Remove a certification associated with a given ID on a key.</summary>
/// <param name="key">The key the certifications are to be removed from.</param>
/// <param name="id">The ID that the certfication is to be removed from.</param>
/// <param name="certification">The certfication to be removed.</param>
/// <returns>The re-certified key, or null if the certification was not found.</returns>
public static PgpPublicKey RemoveCertification(
PgpPublicKey key,
string id,
PgpSignature certification)
{
return RemoveCert(key, id, certification);
}
private static PgpPublicKey AddCert(
PgpPublicKey key,
object id,
PgpSignature certification)
{
PgpPublicKey returnKey = new PgpPublicKey(key);
IList sigList = null;
for (int i = 0; i != returnKey.ids.Count; i++)
{
if (id.Equals(returnKey.ids[i]))
{
sigList = (IList) returnKey.idSigs[i];
}
}
if (sigList != null)
{
sigList.Add(certification);
}
else
{
sigList = Platform.CreateArrayList();
sigList.Add(certification);
returnKey.ids.Add(id);
returnKey.idTrusts.Add(null);
returnKey.idSigs.Add(sigList);
}
return returnKey;
}
public PgpSignatureList(
PgpSignature sig)
{
this.sigs = new PgpSignature[] { sig };
}
public PgpSignatureList(
PgpSignature sig)
{
this.sigs = new PgpSignature[]{ sig };
}
public PgpSignatureList(
PgpSignature[] sigs)
{
this.sigs = (PgpSignature[]) sigs.Clone();
}