1 files changed, 115 insertions, 0 deletions
diff --git a/Crypto/src/bcpg/PublicKeyPacket.cs b/Crypto/src/bcpg/PublicKeyPacket.cs
new file mode 100644
index 000000000..32d43149b
--- /dev/null
+++ b/Crypto/src/bcpg/PublicKeyPacket.cs
@@ -0,0 +1,115 @@
+using System;
+using System.IO;
+
+using Org.BouncyCastle.Utilities.Date;
+
+namespace Org.BouncyCastle.Bcpg
+{
+ /// <remarks>Basic packet for a PGP public key.</remarks>
+ public class PublicKeyPacket
+ : ContainedPacket //, PublicKeyAlgorithmTag
+ {
+ private int version;
+ private long time;
+ private int validDays;
+ private PublicKeyAlgorithmTag algorithm;
+ private IBcpgKey key;
+
+ 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");
+ }
+ }
+
+ /// <summary>Construct a version 4 public key packet.</summary>
+ public PublicKeyPacket(
+ PublicKeyAlgorithmTag algorithm,
+ DateTime time,
+ IBcpgKey key)
+ {
+ this.version = 4;
+ this.time = DateTimeUtilities.DateTimeToUnixMs(time) / 1000L;
+ this.algorithm = algorithm;
+ this.key = key;
+ }
+
+ public int Version
+ {
+ get { return version; }
+ }
+
+ public PublicKeyAlgorithmTag Algorithm
+ {
+ get { return algorithm; }
+ }
+
+ public int ValidDays
+ {
+ get { return validDays; }
+ }
+
+ public DateTime GetTime()
+ {
+ return DateTimeUtilities.UnixMsToDateTime(time * 1000L);
+ }
+
+ public IBcpgKey Key
+ {
+ get { return key; }
+ }
+
+ public byte[] GetEncodedContents()
+ {
+ MemoryStream bOut = new MemoryStream();
+ BcpgOutputStream pOut = new BcpgOutputStream(bOut);
+
+ pOut.WriteByte((byte) version);
+ pOut.WriteInt((int) time);
+
+ if (version <= 3)
+ {
+ pOut.WriteShort((short) validDays);
+ }
+
+ pOut.WriteByte((byte) algorithm);
+
+ pOut.WriteObject((BcpgObject)key);
+
+ return bOut.ToArray();
+ }
+
+ public override void Encode(
+ BcpgOutputStream bcpgOut)
+ {
+ bcpgOut.WritePacket(PacketTag.PublicKey, GetEncodedContents(), true);
+ }
+ }
+}
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