public ElGamalPublicBcpgKey(
BcpgInputStream bcpgIn)
{
this.p = new MPInteger(bcpgIn);
this.g = new MPInteger(bcpgIn);
this.y = new MPInteger(bcpgIn);
}
internal PublicKeyPacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
time = ((uint)bcpgIn.ReadByte() << 24) | ((uint)bcpgIn.ReadByte() << 16)
| ((uint)bcpgIn.ReadByte() << 8) | (uint)bcpgIn.ReadByte();
if (version <= 3)
{
validDays = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
}
algorithm = (PublicKeyAlgorithmTag) bcpgIn.ReadByte();
switch ((PublicKeyAlgorithmTag) algorithm)
{
case PublicKeyAlgorithmTag.RsaEncrypt:
case PublicKeyAlgorithmTag.RsaGeneral:
case PublicKeyAlgorithmTag.RsaSign:
key = new RsaPublicBcpgKey(bcpgIn);
break;
case PublicKeyAlgorithmTag.Dsa:
key = new DsaPublicBcpgKey(bcpgIn);
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt:
case PublicKeyAlgorithmTag.ElGamalGeneral:
key = new ElGamalPublicBcpgKey(bcpgIn);
break;
default:
throw new IOException("unknown PGP public key algorithm encountered");
}
}
internal PublicKeyEncSessionPacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
keyId |= (long)bcpgIn.ReadByte() << 56;
keyId |= (long)bcpgIn.ReadByte() << 48;
keyId |= (long)bcpgIn.ReadByte() << 40;
keyId |= (long)bcpgIn.ReadByte() << 32;
keyId |= (long)bcpgIn.ReadByte() << 24;
keyId |= (long)bcpgIn.ReadByte() << 16;
keyId |= (long)bcpgIn.ReadByte() << 8;
keyId |= (uint)bcpgIn.ReadByte();
algorithm = (PublicKeyAlgorithmTag) bcpgIn.ReadByte();
switch ((PublicKeyAlgorithmTag) algorithm)
{
case PublicKeyAlgorithmTag.RsaEncrypt:
case PublicKeyAlgorithmTag.RsaGeneral:
data = new BigInteger[]{ new MPInteger(bcpgIn).Value };
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt:
case PublicKeyAlgorithmTag.ElGamalGeneral:
data = new BigInteger[]
{
new MPInteger(bcpgIn).Value,
new MPInteger(bcpgIn).Value
};
break;
default:
throw new IOException("unknown PGP public key algorithm encountered");
}
}
/// <param name="bcpgIn">The stream to read the packet from.</param>
public DsaPublicBcpgKey(
BcpgInputStream bcpgIn)
{
this.p = new MPInteger(bcpgIn);
this.q = new MPInteger(bcpgIn);
this.g = new MPInteger(bcpgIn);
this.y = new MPInteger(bcpgIn);
}
internal ExperimentalPacket(
PacketTag tag,
BcpgInputStream bcpgIn)
{
this.tag = tag;
this.contents = bcpgIn.ReadAll();
}
internal ModDetectionCodePacket(
BcpgInputStream bcpgIn)
{
if (bcpgIn == null)
throw new ArgumentNullException("bcpgIn");
this.digest = new byte[20];
bcpgIn.ReadFully(this.digest);
}
public SymmetricKeyEncSessionPacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
encAlgorithm = (SymmetricKeyAlgorithmTag) bcpgIn.ReadByte();
s2k = new S2k(bcpgIn);
secKeyData = bcpgIn.ReadAll();
}
public RsaSecretBcpgKey(
BcpgInputStream bcpgIn)
{
this.d = new MPInteger(bcpgIn);
this.p = new MPInteger(bcpgIn);
this.q = new MPInteger(bcpgIn);
this.u = new MPInteger(bcpgIn);
this.expP = d.Value.Remainder(p.Value.Subtract(BigInteger.One));
this.expQ = d.Value.Remainder(q.Value.Subtract(BigInteger.One));
this.crt = q.Value.ModInverse(p.Value);
}
public TrustPacket(
BcpgInputStream bcpgIn)
{
MemoryStream bOut = new MemoryStream();
int ch;
while ((ch = bcpgIn.ReadByte()) >= 0)
{
bOut.WriteByte((byte) ch);
}
levelAndTrustAmount = bOut.ToArray();
}
public MPInteger(
BcpgInputStream bcpgIn)
{
if (bcpgIn == null)
throw new ArgumentNullException("bcpgIn");
int length = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] bytes = new byte[(length + 7) / 8];
bcpgIn.ReadFully(bytes);
this.val = new BigInteger(1, bytes);
}
internal LiteralDataPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
format = bcpgIn.ReadByte();
int len = bcpgIn.ReadByte();
fileName = new byte[len];
for (int i = 0; i != len; ++i)
{
fileName[i] = (byte)bcpgIn.ReadByte();
}
modDate = (((uint)bcpgIn.ReadByte() << 24)
| ((uint)bcpgIn.ReadByte() << 16)
| ((uint)bcpgIn.ReadByte() << 8)
| (uint)bcpgIn.ReadByte()) * 1000L;
}
public UserAttributePacket(
BcpgInputStream bcpgIn)
{
UserAttributeSubpacketsParser sIn = new UserAttributeSubpacketsParser(bcpgIn);
UserAttributeSubpacket sub;
IList v = Platform.CreateArrayList();
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
subpackets = new UserAttributeSubpacket[v.Count];
for (int i = 0; i != subpackets.Length; i++)
{
subpackets[i] = (UserAttributeSubpacket)v[i];
}
}
internal OnePassSignaturePacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
sigType = bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag) bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag) bcpgIn.ReadByte();
keyId |= (long)bcpgIn.ReadByte() << 56;
keyId |= (long)bcpgIn.ReadByte() << 48;
keyId |= (long)bcpgIn.ReadByte() << 40;
keyId |= (long)bcpgIn.ReadByte() << 32;
keyId |= (long)bcpgIn.ReadByte() << 24;
keyId |= (long)bcpgIn.ReadByte() << 16;
keyId |= (long)bcpgIn.ReadByte() << 8;
keyId |= (uint)bcpgIn.ReadByte();
nested = bcpgIn.ReadByte();
}
internal SecretKeyPacket(
BcpgInputStream bcpgIn)
{
if (this is SecretSubkeyPacket)
{
pubKeyPacket = new PublicSubkeyPacket(bcpgIn);
}
else
{
pubKeyPacket = new PublicKeyPacket(bcpgIn);
}
s2kUsage = bcpgIn.ReadByte();
if (s2kUsage == UsageChecksum || s2kUsage == UsageSha1)
{
encAlgorithm = (SymmetricKeyAlgorithmTag) bcpgIn.ReadByte();
s2k = new S2k(bcpgIn);
}
else
{
encAlgorithm = (SymmetricKeyAlgorithmTag) s2kUsage;
}
if (!(s2k != null && s2k.Type == S2k.GnuDummyS2K && s2k.ProtectionMode == 0x01))
{
if (s2kUsage != 0)
{
if (((int) encAlgorithm) < 7)
{
iv = new byte[8];
}
else
{
iv = new byte[16];
}
bcpgIn.ReadFully(iv);
}
}
secKeyData = bcpgIn.ReadAll();
}
public UserIdPacket(
BcpgInputStream bcpgIn)
{
this.idData = bcpgIn.ReadAll();
}
internal SignaturePacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
if (version == 3 || version == 2)
{
// int l =
bcpgIn.ReadByte();
signatureType = bcpgIn.ReadByte();
creationTime = (((long)bcpgIn.ReadByte() << 24) | ((long)bcpgIn.ReadByte() << 16)
| ((long)bcpgIn.ReadByte() << 8) | (uint)bcpgIn.ReadByte()) * 1000L;
keyId |= (long)bcpgIn.ReadByte() << 56;
keyId |= (long)bcpgIn.ReadByte() << 48;
keyId |= (long)bcpgIn.ReadByte() << 40;
keyId |= (long)bcpgIn.ReadByte() << 32;
keyId |= (long)bcpgIn.ReadByte() << 24;
keyId |= (long)bcpgIn.ReadByte() << 16;
keyId |= (long)bcpgIn.ReadByte() << 8;
keyId |= (uint)bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag) bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag) bcpgIn.ReadByte();
}
else if (version == 4)
{
signatureType = bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag) bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag) bcpgIn.ReadByte();
int hashedLength = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] hashed = new byte[hashedLength];
bcpgIn.ReadFully(hashed);
//
// read the signature sub packet data.
//
SignatureSubpacketsParser sIn = new SignatureSubpacketsParser(
new MemoryStream(hashed, false));
IList v = Platform.CreateArrayList();
SignatureSubpacket sub;
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
hashedData = new SignatureSubpacket[v.Count];
for (int i = 0; i != hashedData.Length; i++)
{
SignatureSubpacket p = (SignatureSubpacket)v[i];
if (p is IssuerKeyId)
{
keyId = ((IssuerKeyId)p).KeyId;
}
else if (p is SignatureCreationTime)
{
creationTime = DateTimeUtilities.DateTimeToUnixMs(
((SignatureCreationTime)p).GetTime());
}
hashedData[i] = p;
}
int unhashedLength = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] unhashed = new byte[unhashedLength];
bcpgIn.ReadFully(unhashed);
sIn = new SignatureSubpacketsParser(new MemoryStream(unhashed, false));
v.Clear();
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
unhashedData = new SignatureSubpacket[v.Count];
for (int i = 0; i != unhashedData.Length; i++)
{
SignatureSubpacket p = (SignatureSubpacket)v[i];
if (p is IssuerKeyId)
{
keyId = ((IssuerKeyId)p).KeyId;
}
unhashedData[i] = p;
}
}
else
{
throw new Exception("unsupported version: " + version);
}
fingerprint = new byte[2];
bcpgIn.ReadFully(fingerprint);
switch (keyAlgorithm)
{
case PublicKeyAlgorithmTag.RsaGeneral:
case PublicKeyAlgorithmTag.RsaSign:
MPInteger v = new MPInteger(bcpgIn);
signature = new MPInteger[]{ v };
break;
case PublicKeyAlgorithmTag.Dsa:
MPInteger r = new MPInteger(bcpgIn);
MPInteger s = new MPInteger(bcpgIn);
signature = new MPInteger[]{ r, s };
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt: // yep, this really does happen sometimes.
case PublicKeyAlgorithmTag.ElGamalGeneral:
MPInteger p = new MPInteger(bcpgIn);
MPInteger g = new MPInteger(bcpgIn);
MPInteger y = new MPInteger(bcpgIn);
signature = new MPInteger[]{ p, g, y };
break;
default:
if (keyAlgorithm >= PublicKeyAlgorithmTag.Experimental_1 && keyAlgorithm <= PublicKeyAlgorithmTag.Experimental_11)
{
signature = null;
MemoryStream bOut = new MemoryStream();
int ch;
while ((ch = bcpgIn.ReadByte()) >= 0)
{
bOut.WriteByte((byte) ch);
}
signatureEncoding = bOut.ToArray();
}
else
{
throw new IOException("unknown signature key algorithm: " + keyAlgorithm);
}
break;
}
}
public UserIdPacket(
BcpgInputStream bcpgIn)
{
this.idData = bcpgIn.ReadAll();
}
internal CompressedDataPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
this.algorithm = (CompressionAlgorithmTag) bcpgIn.ReadByte();
}
public Packet ReadPacket()
{
int hdr = ReadByte();
if (hdr < 0)
{
return null;
}
if ((hdr & 0x80) == 0)
{
throw new IOException("invalid header encountered");
}
bool newPacket = (hdr & 0x40) != 0;
PacketTag tag;
int bodyLen = 0;
bool partial = false;
if (newPacket)
{
tag = (PacketTag) (hdr & 0x3f);
int l = ReadByte();
if (l < 192)
{
bodyLen = l;
}
else if (l <= 223)
{
int b = _in.ReadByte();
bodyLen = ((l - 192) << 8) + (b) + 192;
}
else if (l == 255)
{
bodyLen = (_in.ReadByte() << 24) | (_in.ReadByte() << 16) | (_in.ReadByte() << 8) | _in.ReadByte();
}
else
{
partial = true;
bodyLen = 1 << (l & 0x1f);
}
}
else
{
int lengthType = hdr & 0x3;
tag = (PacketTag) ((hdr & 0x3f) >> 2);
switch (lengthType)
{
case 0:
bodyLen = ReadByte();
break;
case 1:
bodyLen = (ReadByte() << 8) | ReadByte();
break;
case 2:
bodyLen = (ReadByte() << 24) | (ReadByte() << 16) | (ReadByte() << 8) | ReadByte();
break;
case 3:
partial = true;
break;
default:
throw new IOException("unknown length type encountered");
}
}
BcpgInputStream objStream;
if (bodyLen == 0 && partial)
{
objStream = this;
}
else
{
var pis = new PartialInputStream(this, partial, bodyLen);
objStream = new BcpgInputStream(pis);
}
switch (tag)
{
case PacketTag.Reserved:
return new InputStreamPacket(objStream);
case PacketTag.PublicKeyEncryptedSession:
return new PublicKeyEncSessionPacket(objStream);
case PacketTag.Signature:
return new SignaturePacket(objStream);
case PacketTag.SymmetricKeyEncryptedSessionKey:
return new SymmetricKeyEncSessionPacket(objStream);
case PacketTag.OnePassSignature:
return new OnePassSignaturePacket(objStream);
case PacketTag.SecretKey:
return new SecretKeyPacket(objStream);
case PacketTag.PublicKey:
return new PublicKeyPacket(objStream);
case PacketTag.SecretSubkey:
return new SecretSubkeyPacket(objStream);
case PacketTag.CompressedData:
return new CompressedDataPacket(objStream);
case PacketTag.SymmetricKeyEncrypted:
return new SymmetricEncDataPacket(objStream);
case PacketTag.Marker:
return new MarkerPacket(objStream);
case PacketTag.LiteralData:
return new LiteralDataPacket(objStream);
case PacketTag.Trust:
return new TrustPacket(objStream);
case PacketTag.UserId:
return new UserIdPacket(objStream);
case PacketTag.UserAttribute:
return new UserAttributePacket(objStream);
case PacketTag.PublicSubkey:
return new PublicSubkeyPacket(objStream);
case PacketTag.SymmetricEncryptedIntegrityProtected:
return new SymmetricEncIntegrityPacket(objStream);
case PacketTag.ModificationDetectionCode:
return new ModDetectionCodePacket(objStream);
case PacketTag.Experimental1:
case PacketTag.Experimental2:
case PacketTag.Experimental3:
case PacketTag.Experimental4:
return new ExperimentalPacket(tag, objStream);
default:
throw new IOException("unknown packet type encountered: " + tag);
}
}
/**
* @param in
*/
public DsaSecretBcpgKey(
BcpgInputStream bcpgIn)
{
this.x = new MPInteger(bcpgIn);
}
internal PublicSubkeyPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
}
public MarkerPacket(
BcpgInputStream bcpgIn)
{
bcpgIn.ReadFully(marker);
}
public SymmetricEncDataPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
}
internal SignaturePacket(
BcpgInputStream bcpgIn)
{
version = bcpgIn.ReadByte();
if (version == 3 || version == 2)
{
// int l =
bcpgIn.ReadByte();
signatureType = bcpgIn.ReadByte();
creationTime = (((long)bcpgIn.ReadByte() << 24) | ((long)bcpgIn.ReadByte() << 16)
| ((long)bcpgIn.ReadByte() << 8) | (uint)bcpgIn.ReadByte()) * 1000L;
keyId |= (long)bcpgIn.ReadByte() << 56;
keyId |= (long)bcpgIn.ReadByte() << 48;
keyId |= (long)bcpgIn.ReadByte() << 40;
keyId |= (long)bcpgIn.ReadByte() << 32;
keyId |= (long)bcpgIn.ReadByte() << 24;
keyId |= (long)bcpgIn.ReadByte() << 16;
keyId |= (long)bcpgIn.ReadByte() << 8;
keyId |= (uint)bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag)bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag)bcpgIn.ReadByte();
}
else if (version == 4)
{
signatureType = bcpgIn.ReadByte();
keyAlgorithm = (PublicKeyAlgorithmTag)bcpgIn.ReadByte();
hashAlgorithm = (HashAlgorithmTag)bcpgIn.ReadByte();
int hashedLength = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] hashed = new byte[hashedLength];
bcpgIn.ReadFully(hashed);
//
// read the signature sub packet data.
//
SignatureSubpacketsParser sIn = new SignatureSubpacketsParser(
new MemoryStream(hashed, false));
IList v = Platform.CreateArrayList();
SignatureSubpacket sub;
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
hashedData = new SignatureSubpacket[v.Count];
for (int i = 0; i != hashedData.Length; i++)
{
SignatureSubpacket p = (SignatureSubpacket)v[i];
if (p is IssuerKeyId)
{
keyId = ((IssuerKeyId)p).KeyId;
}
else if (p is SignatureCreationTime)
{
creationTime = DateTimeUtilities.DateTimeToUnixMs(
((SignatureCreationTime)p).GetTime());
}
hashedData[i] = p;
}
int unhashedLength = (bcpgIn.ReadByte() << 8) | bcpgIn.ReadByte();
byte[] unhashed = new byte[unhashedLength];
bcpgIn.ReadFully(unhashed);
sIn = new SignatureSubpacketsParser(new MemoryStream(unhashed, false));
v.Clear();
while ((sub = sIn.ReadPacket()) != null)
{
v.Add(sub);
}
unhashedData = new SignatureSubpacket[v.Count];
for (int i = 0; i != unhashedData.Length; i++)
{
SignatureSubpacket p = (SignatureSubpacket)v[i];
if (p is IssuerKeyId)
{
keyId = ((IssuerKeyId)p).KeyId;
}
unhashedData[i] = p;
}
}
else
{
throw new Exception("unsupported version: " + version);
}
fingerprint = new byte[2];
bcpgIn.ReadFully(fingerprint);
switch (keyAlgorithm)
{
case PublicKeyAlgorithmTag.RsaGeneral:
case PublicKeyAlgorithmTag.RsaSign:
MPInteger v = new MPInteger(bcpgIn);
signature = new MPInteger[] { v };
break;
case PublicKeyAlgorithmTag.Dsa:
MPInteger r = new MPInteger(bcpgIn);
MPInteger s = new MPInteger(bcpgIn);
signature = new MPInteger[] { r, s };
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt: // yep, this really does happen sometimes.
case PublicKeyAlgorithmTag.ElGamalGeneral:
MPInteger p = new MPInteger(bcpgIn);
MPInteger g = new MPInteger(bcpgIn);
MPInteger y = new MPInteger(bcpgIn);
signature = new MPInteger[] { p, g, y };
break;
default:
if (keyAlgorithm >= PublicKeyAlgorithmTag.Experimental_1 && keyAlgorithm <= PublicKeyAlgorithmTag.Experimental_11)
{
signature = null;
MemoryStream bOut = new MemoryStream();
int ch;
while ((ch = bcpgIn.ReadByte()) >= 0)
{
bOut.WriteByte((byte)ch);
}
signatureEncoding = bOut.ToArray();
}
else
{
throw new IOException("unknown signature key algorithm: " + keyAlgorithm);
}
break;
}
}
public MarkerPacket(
BcpgInputStream bcpgIn)
{
bcpgIn.ReadFully(marker);
}
internal SecretSubkeyPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
}
/**
* @param in
*/
public ElGamalSecretBcpgKey(
BcpgInputStream bcpgIn)
{
this.x = new MPInteger(bcpgIn);
}
internal SecretSubkeyPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
}
internal SymmetricEncIntegrityPacket(
BcpgInputStream bcpgIn)
: base(bcpgIn)
{
version = bcpgIn.ReadByte();
}
/// <summary>Construct an RSA public key from the passed in stream.</summary>
public RsaPublicBcpgKey(
BcpgInputStream bcpgIn)
{
this.n = new MPInteger(bcpgIn);
this.e = new MPInteger(bcpgIn);
}
internal PartialInputStream(BcpgInputStream bcpgIn, bool partial, int dataLength)
{
_in = bcpgIn;
_partial = partial;
_dataLength = dataLength;
}