Another round of TLS porting from Java
1 files changed, 94 insertions, 0 deletions
diff --git a/crypto/src/crypto/tls/UrlAndHash.cs b/crypto/src/crypto/tls/UrlAndHash.cs
new file mode 100644
index 000000000..9ffd2cbf8
--- /dev/null
+++ b/crypto/src/crypto/tls/UrlAndHash.cs
@@ -0,0 +1,94 @@
+using System;
+using System.IO;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+ /**
+ * RFC 6066 5.
+ */
+ public class UrlAndHash
+ {
+ protected readonly string mUrl;
+ protected readonly byte[] mSha1Hash;
+
+ public UrlAndHash(string url, byte[] sha1Hash)
+ {
+ if (url == null || url.Length < 1 || url.Length >= (1 << 16))
+ throw new ArgumentException("must have length from 1 to (2^16 - 1)", "url");
+ if (sha1Hash != null && sha1Hash.Length != 20)
+ throw new ArgumentException("must have length == 20, if present", "sha1Hash");
+
+ this.mUrl = url;
+ this.mSha1Hash = sha1Hash;
+ }
+
+ public virtual string Url
+ {
+ get { return mUrl; }
+ }
+
+ public virtual byte[] Sha1Hash
+ {
+ get { return mSha1Hash; }
+ }
+
+ /**
+ * Encode this {@link UrlAndHash} to a {@link Stream}.
+ *
+ * @param output the {@link Stream} to encode to.
+ * @throws IOException
+ */
+ public virtual void Encode(Stream output)
+ {
+ byte[] urlEncoding = Strings.ToByteArray(this.mUrl);
+ TlsUtilities.WriteOpaque16(urlEncoding, output);
+
+ if (this.mSha1Hash == null)
+ {
+ TlsUtilities.WriteUint8(0, output);
+ }
+ else
+ {
+ TlsUtilities.WriteUint8(1, output);
+ output.Write(this.mSha1Hash, 0, this.mSha1Hash.Length);
+ }
+ }
+
+ /**
+ * Parse a {@link UrlAndHash} from a {@link Stream}.
+ *
+ * @param context
+ * the {@link TlsContext} of the current connection.
+ * @param input
+ * the {@link Stream} to parse from.
+ * @return a {@link UrlAndHash} object.
+ * @throws IOException
+ */
+ public static UrlAndHash Parse(TlsContext context, Stream input)
+ {
+ byte[] urlEncoding = TlsUtilities.ReadOpaque16(input);
+ if (urlEncoding.Length < 1)
+ throw new TlsFatalAlert(AlertDescription.illegal_parameter);
+ string url = Strings.FromByteArray(urlEncoding);
+
+ byte[] sha1Hash = null;
+ byte padding = TlsUtilities.ReadUint8(input);
+ switch (padding)
+ {
+ case 0:
+ if (TlsUtilities.IsTlsV12(context))
+ throw new TlsFatalAlert(AlertDescription.illegal_parameter);
+ break;
+ case 1:
+ sha1Hash = TlsUtilities.ReadFully(20, input);
+ break;
+ default:
+ throw new TlsFatalAlert(AlertDescription.illegal_parameter);
+ }
+
+ return new UrlAndHash(url, sha1Hash);
+ }
+ }
+}
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