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author | Peter Dettman <peter.dettman@bouncycastle.org> | 2013-06-28 15:26:06 +0700 |
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committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2013-06-28 15:26:06 +0700 |
commit | 44288db4414158ac9b98a507b15e81d0d3c66ca6 (patch) | |
tree | aa5ef88948ebb68ed6c8df81eb5da889641a9b50 /crypto/src/bcpg/sig/NotationData.cs | |
parent | Set up text/binary handling for existing file types (diff) | |
download | BouncyCastle.NET-ed25519-44288db4414158ac9b98a507b15e81d0d3c66ca6.tar.xz |
Initial import of old CVS repository
Diffstat (limited to 'crypto/src/bcpg/sig/NotationData.cs')
-rw-r--r-- | crypto/src/bcpg/sig/NotationData.cs | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/crypto/src/bcpg/sig/NotationData.cs b/crypto/src/bcpg/sig/NotationData.cs new file mode 100644 index 000000000..ccc9aa745 --- /dev/null +++ b/crypto/src/bcpg/sig/NotationData.cs @@ -0,0 +1,112 @@ +using System; +using System.IO; +using System.Text; + +namespace Org.BouncyCastle.Bcpg.Sig +{ + /** + * Class provided a NotationData object according to + * RFC2440, Chapter 5.2.3.15. Notation Data + */ + public class NotationData + : SignatureSubpacket + { + public const int HeaderFlagLength = 4; + public const int HeaderNameLength = 2; + public const int HeaderValueLength = 2; + + public NotationData( + bool critical, + byte[] data) + : base(SignatureSubpacketTag.NotationData, critical, data) + { + } + + public NotationData( + bool critical, + bool humanReadable, + string notationName, + string notationValue) + : base(SignatureSubpacketTag.NotationData, critical, + createData(humanReadable, notationName, notationValue)) + { + } + + private static byte[] createData( + bool humanReadable, + string notationName, + string notationValue) + { + MemoryStream os = new MemoryStream(); + + // (4 octets of flags, 2 octets of name length (M), + // 2 octets of value length (N), + // M octets of name data, + // N octets of value data) + + // flags + os.WriteByte(humanReadable ? (byte)0x80 : (byte)0x00); + os.WriteByte(0x0); + os.WriteByte(0x0); + os.WriteByte(0x0); + + byte[] nameData, valueData = null; + int nameLength, valueLength; + + nameData = Encoding.UTF8.GetBytes(notationName); + nameLength = System.Math.Min(nameData.Length, 0xFF); + + valueData = Encoding.UTF8.GetBytes(notationValue); + valueLength = System.Math.Min(valueData.Length, 0xFF); + + // name length + os.WriteByte((byte)(nameLength >> 8)); + os.WriteByte((byte)(nameLength >> 0)); + + // value length + os.WriteByte((byte)(valueLength >> 8)); + os.WriteByte((byte)(valueLength >> 0)); + + // name + os.Write(nameData, 0, nameLength); + + // value + os.Write(valueData, 0, valueLength); + + return os.ToArray(); + } + + public bool IsHumanReadable + { + get { return data[0] == (byte)0x80; } + } + + public string GetNotationName() + { + int nameLength = ((data[HeaderFlagLength] << 8) + (data[HeaderFlagLength + 1] << 0)); + int namePos = HeaderFlagLength + HeaderNameLength + HeaderValueLength; + + return Encoding.UTF8.GetString(data, namePos, nameLength); + } + + public string GetNotationValue() + { + int nameLength = ((data[HeaderFlagLength] << 8) + (data[HeaderFlagLength + 1] << 0)); + int valueLength = ((data[HeaderFlagLength + HeaderNameLength] << 8) + (data[HeaderFlagLength + HeaderNameLength + 1] << 0)); + int valuePos = HeaderFlagLength + HeaderNameLength + HeaderValueLength + nameLength; + + return Encoding.UTF8.GetString(data, valuePos, valueLength); + } + + public byte[] GetNotationValueBytes() + { + int nameLength = ((data[HeaderFlagLength] << 8) + (data[HeaderFlagLength + 1] << 0)); + int valueLength = ((data[HeaderFlagLength + HeaderNameLength] << 8) + (data[HeaderFlagLength + HeaderNameLength + 1] << 0)); + int valuePos = HeaderFlagLength + HeaderNameLength + HeaderValueLength + nameLength; + + byte[] bytes = new byte[valueLength]; + Array.Copy(data, valuePos, bytes, 0, valueLength); + return bytes; + } + } +} |