/// <param name="n">The modulus.</param>
/// <param name="e">The public exponent.</param>
public RsaPublicBcpgKey(
BigInteger n,
BigInteger e)
{
this.n = new MPInteger(n);
this.e = new MPInteger(e);
}
public RsaSecretBcpgKey(
BigInteger d,
BigInteger p,
BigInteger q)
{
// PGP requires (p < q)
int cmp = p.CompareTo(q);
if (cmp >= 0)
{
if (cmp == 0)
{
throw new ArgumentException("p and q cannot be equal");
}
BigInteger tmp = p;
p = q;
q = tmp;
}
this.d = new MPInteger(d);
this.p = new MPInteger(p);
this.q = new MPInteger(q);
this.u = new MPInteger(p.ModInverse(q));
this.expP = d.Remainder(p.Subtract(BigInteger.One));
this.expQ = d.Remainder(q.Subtract(BigInteger.One));
this.crt = q.ModInverse(p);
}
public ElGamalPublicBcpgKey(
BcpgInputStream bcpgIn)
{
this.p = new MPInteger(bcpgIn);
this.g = new MPInteger(bcpgIn);
this.y = new MPInteger(bcpgIn);
}
/// <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);
}
public ElGamalPublicBcpgKey(
BigInteger p,
BigInteger g,
BigInteger y)
{
this.p = new MPInteger(p);
this.g = new MPInteger(g);
this.y = new MPInteger(y);
}
public DsaPublicBcpgKey(
BigInteger p,
BigInteger q,
BigInteger g,
BigInteger y)
{
this.p = new MPInteger(p);
this.q = new MPInteger(q);
this.g = new MPInteger(g);
this.y = new MPInteger(y);
}
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 override void Encode(
BcpgOutputStream bcpgOut)
{
MemoryStream bOut = new MemoryStream();
BcpgOutputStream pOut = new BcpgOutputStream(bOut);
pOut.WriteByte((byte)version);
pOut.WriteLong(keyId);
pOut.WriteByte((byte)algorithm);
for (int i = 0; i != data.Length; i++)
{
MPInteger.Encode(pOut, data[i]);
}
bcpgOut.WritePacket(PacketTag.PublicKeyEncryptedSession, bOut.ToArray(), true);
}
/**
* @param x
*/
public ElGamalSecretBcpgKey(
BigInteger x)
{
this.x = new MPInteger(x);
}
/**
* @param in
*/
public ElGamalSecretBcpgKey(
BcpgInputStream bcpgIn)
{
this.x = new MPInteger(bcpgIn);
}
public DsaSecretBcpgKey(
BigInteger x)
{
this.x = new MPInteger(x);
}
/// <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 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;
}
}