1 files changed, 56 insertions, 0 deletions
diff --git a/crypto/src/asn1/LazyDLEnumerator.cs b/crypto/src/asn1/LazyDLEnumerator.cs
new file mode 100644
index 000000000..efe383e3d
--- /dev/null
+++ b/crypto/src/asn1/LazyDLEnumerator.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Collections;
+using System.IO;
+
+namespace Org.BouncyCastle.Asn1
+{
+ internal class LazyDLEnumerator
+ : IEnumerator
+ {
+ private readonly byte[] m_contents;
+
+ private Asn1InputStream m_input;
+ private Asn1Object m_current;
+
+ internal LazyDLEnumerator(byte[] contents)
+ {
+ this.m_contents = contents;
+
+ Reset();
+ }
+
+ public object Current
+ {
+ get
+ {
+ if (null == m_current)
+ throw new InvalidOperationException();
+
+ return m_current;
+ }
+ }
+
+ public bool MoveNext()
+ {
+ return null != (this.m_current = ReadObject());
+ }
+
+ public void Reset()
+ {
+ this.m_input = new LazyAsn1InputStream(m_contents);
+ this.m_current = null;
+ }
+
+ private Asn1Object ReadObject()
+ {
+ try
+ {
+ return m_input.ReadObject();
+ }
+ catch (IOException e)
+ {
+ throw new Asn1ParsingException("malformed ASN.1: " + e.Message, e);
+ }
+ }
+ }
+}
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