1 files changed, 135 insertions, 0 deletions
diff --git a/Crypto/src/asn1/BerOctetString.cs b/Crypto/src/asn1/BerOctetString.cs
new file mode 100644
index 000000000..a7c8ad33e
--- /dev/null
+++ b/Crypto/src/asn1/BerOctetString.cs
@@ -0,0 +1,135 @@
+using System;
+using System.Collections;
+using System.IO;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1
+{
+ public class BerOctetString
+ : DerOctetString, IEnumerable
+ {
+ public static BerOctetString FromSequence(Asn1Sequence seq)
+ {
+ IList v = Platform.CreateArrayList();
+
+ foreach (Asn1Encodable obj in seq)
+ {
+ v.Add(obj);
+ }
+
+ return new BerOctetString(v);
+ }
+
+ private const int MaxLength = 1000;
+
+ /**
+ * convert a vector of octet strings into a single byte string
+ */
+ private static byte[] ToBytes(
+ IEnumerable octs)
+ {
+ MemoryStream bOut = new MemoryStream();
+ foreach (DerOctetString o in octs)
+ {
+ byte[] octets = o.GetOctets();
+ bOut.Write(octets, 0, octets.Length);
+ }
+ return bOut.ToArray();
+ }
+
+ private readonly IEnumerable octs;
+
+ /// <param name="str">The octets making up the octet string.</param>
+ public BerOctetString(
+ byte[] str)
+ : base(str)
+ {
+ }
+
+ public BerOctetString(
+ IEnumerable octets)
+ : base(ToBytes(octets))
+ {
+ this.octs = octets;
+ }
+
+ public BerOctetString(
+ Asn1Object obj)
+ : base(obj)
+ {
+ }
+
+ public BerOctetString(
+ Asn1Encodable obj)
+ : base(obj.ToAsn1Object())
+ {
+ }
+
+ public override byte[] GetOctets()
+ {
+ return str;
+ }
+
+ /**
+ * return the DER octets that make up this string.
+ */
+ public IEnumerator GetEnumerator()
+ {
+ if (octs == null)
+ {
+ return GenerateOcts().GetEnumerator();
+ }
+
+ return octs.GetEnumerator();
+ }
+
+ [Obsolete("Use GetEnumerator() instead")]
+ public IEnumerator GetObjects()
+ {
+ return GetEnumerator();
+ }
+
+ private IList GenerateOcts()
+ {
+ IList vec = Platform.CreateArrayList();
+ for (int i = 0; i < str.Length; i += MaxLength)
+ {
+ int end = System.Math.Min(str.Length, i + MaxLength);
+
+ byte[] nStr = new byte[end - i];
+
+ Array.Copy(str, i, nStr, 0, nStr.Length);
+
+ vec.Add(new DerOctetString(nStr));
+ }
+ return vec;
+ }
+
+ internal override void Encode(
+ DerOutputStream derOut)
+ {
+ if (derOut is Asn1OutputStream || derOut is BerOutputStream)
+ {
+ derOut.WriteByte(Asn1Tags.Constructed | Asn1Tags.OctetString);
+
+ derOut.WriteByte(0x80);
+
+ //
+ // write out the octet array
+ //
+ foreach (DerOctetString oct in this)
+ {
+ derOut.WriteObject(oct);
+ }
+
+ derOut.WriteByte(0x00);
+ derOut.WriteByte(0x00);
+ }
+ else
+ {
+ base.Encode(derOut);
+ }
+ }
+ }
+}
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