93 lines
2.4 KiB
C#
93 lines
2.4 KiB
C#
using System.IO;
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using Org.BouncyCastle.Utilities;
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using Org.BouncyCastle.Utilities.IO;
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namespace Org.BouncyCastle.Bcpg;
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public class PublicKeyEncSessionPacket : ContainedPacket
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{
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private int version;
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private long keyId;
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private PublicKeyAlgorithmTag algorithm;
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private byte[][] data;
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public int Version => version;
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public long KeyId => keyId;
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public PublicKeyAlgorithmTag Algorithm => algorithm;
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internal PublicKeyEncSessionPacket(BcpgInputStream bcpgIn)
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{
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version = bcpgIn.ReadByte();
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keyId |= (long)bcpgIn.ReadByte() << 56;
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keyId |= (long)bcpgIn.ReadByte() << 48;
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keyId |= (long)bcpgIn.ReadByte() << 40;
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keyId |= (long)bcpgIn.ReadByte() << 32;
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keyId |= (long)bcpgIn.ReadByte() << 24;
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keyId |= (long)bcpgIn.ReadByte() << 16;
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keyId |= (long)bcpgIn.ReadByte() << 8;
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keyId |= (uint)bcpgIn.ReadByte();
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algorithm = (PublicKeyAlgorithmTag)bcpgIn.ReadByte();
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switch (algorithm)
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{
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case PublicKeyAlgorithmTag.RsaGeneral:
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case PublicKeyAlgorithmTag.RsaEncrypt:
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data = new byte[1][] { new MPInteger(bcpgIn).GetEncoded() };
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break;
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case PublicKeyAlgorithmTag.ElGamalEncrypt:
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case PublicKeyAlgorithmTag.ElGamalGeneral:
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{
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MPInteger mPInteger = new MPInteger(bcpgIn);
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MPInteger mPInteger2 = new MPInteger(bcpgIn);
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data = new byte[2][]
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{
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mPInteger.GetEncoded(),
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mPInteger2.GetEncoded()
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};
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break;
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}
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case PublicKeyAlgorithmTag.EC:
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data = new byte[1][] { Streams.ReadAll(bcpgIn) };
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break;
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default:
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throw new IOException("unknown PGP public key algorithm encountered");
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}
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}
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public PublicKeyEncSessionPacket(long keyId, PublicKeyAlgorithmTag algorithm, byte[][] data)
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{
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version = 3;
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this.keyId = keyId;
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this.algorithm = algorithm;
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this.data = new byte[data.Length][];
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for (int i = 0; i < data.Length; i++)
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{
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this.data[i] = Arrays.Clone(data[i]);
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}
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}
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public byte[][] GetEncSessionKey()
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{
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return data;
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}
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public override void Encode(BcpgOutputStream bcpgOut)
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{
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MemoryStream memoryStream = new MemoryStream();
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BcpgOutputStream bcpgOutputStream = new BcpgOutputStream(memoryStream);
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bcpgOutputStream.WriteByte((byte)version);
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bcpgOutputStream.WriteLong(keyId);
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bcpgOutputStream.WriteByte((byte)algorithm);
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for (int i = 0; i < data.Length; i++)
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{
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bcpgOutputStream.Write(data[i]);
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}
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Platform.Dispose(bcpgOutputStream);
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bcpgOut.WritePacket(PacketTag.PublicKeyEncryptedSession, memoryStream.ToArray(), oldFormat: true);
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}
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}
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