1 files changed, 76 insertions, 0 deletions
diff --git a/Crypto/src/bcpg/SignatureSubpacket.cs b/Crypto/src/bcpg/SignatureSubpacket.cs
new file mode 100644
index 000000000..ac26f8a3c
--- /dev/null
+++ b/Crypto/src/bcpg/SignatureSubpacket.cs
@@ -0,0 +1,76 @@
+using System.IO;
+
+namespace Org.BouncyCastle.Bcpg
+{
+ /// <remarks>Basic type for a PGP Signature sub-packet.</remarks>
+ public class SignatureSubpacket
+ {
+ private readonly SignatureSubpacketTag type;
+ private readonly bool critical;
+
+ internal readonly byte[] data;
+
+ protected internal SignatureSubpacket(
+ SignatureSubpacketTag type,
+ bool critical,
+ byte[] data)
+ {
+ this.type = type;
+ this.critical = critical;
+ this.data = data;
+ }
+
+ public SignatureSubpacketTag SubpacketType
+ {
+ get { return type; }
+ }
+
+ public bool IsCritical()
+ {
+ return critical;
+ }
+
+ /// <summary>Return the generic data making up the packet.</summary>
+ public byte[] GetData()
+ {
+ return (byte[]) data.Clone();
+ }
+
+ public void Encode(
+ Stream os)
+ {
+ int bodyLen = data.Length + 1;
+
+ if (bodyLen < 192)
+ {
+ os.WriteByte((byte)bodyLen);
+ }
+ else if (bodyLen <= 8383)
+ {
+ bodyLen -= 192;
+
+ os.WriteByte((byte)(((bodyLen >> 8) & 0xff) + 192));
+ os.WriteByte((byte)bodyLen);
+ }
+ else
+ {
+ os.WriteByte(0xff);
+ os.WriteByte((byte)(bodyLen >> 24));
+ os.WriteByte((byte)(bodyLen >> 16));
+ os.WriteByte((byte)(bodyLen >> 8));
+ os.WriteByte((byte)bodyLen);
+ }
+
+ if (critical)
+ {
+ os.WriteByte((byte)(0x80 | (int) type));
+ }
+ else
+ {
+ os.WriteByte((byte) type);
+ }
+
+ os.Write(data, 0, data.Length);
+ }
+ }
+}
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