1 files changed, 79 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/X509Extension.cs b/Crypto/src/asn1/x509/X509Extension.cs
new file mode 100644
index 000000000..430ce4447
--- /dev/null
+++ b/Crypto/src/asn1/x509/X509Extension.cs
@@ -0,0 +1,79 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+ /**
+ * an object for the elements in the X.509 V3 extension block.
+ */
+ public class X509Extension
+ {
+ internal bool critical;
+ internal Asn1OctetString value;
+
+ public X509Extension(
+ DerBoolean critical,
+ Asn1OctetString value)
+ {
+ if (critical == null)
+ {
+ throw new ArgumentNullException("critical");
+ }
+
+ this.critical = critical.IsTrue;
+ this.value = value;
+ }
+
+ public X509Extension(
+ bool critical,
+ Asn1OctetString value)
+ {
+ this.critical = critical;
+ this.value = value;
+ }
+
+ public bool IsCritical { get { return critical; } }
+
+ public Asn1OctetString Value { get { return value; } }
+
+ public Asn1Encodable GetParsedValue()
+ {
+ return ConvertValueToObject(this);
+ }
+
+ public override int GetHashCode()
+ {
+ int vh = this.Value.GetHashCode();
+
+ return IsCritical ? vh : ~vh;
+ }
+
+ public override bool Equals(
+ object obj)
+ {
+ X509Extension other = obj as X509Extension;
+ if (other == null)
+ {
+ return false;
+ }
+
+ return Value.Equals(other.Value) && IsCritical == other.IsCritical;
+ }
+
+ /// <sumary>Convert the value of the passed in extension to an object.</sumary>
+ /// <param name="ext">The extension to parse.</param>
+ /// <returns>The object the value string contains.</returns>
+ /// <exception cref="ArgumentException">If conversion is not possible.</exception>
+ public static Asn1Object ConvertValueToObject(
+ X509Extension ext)
+ {
+ try
+ {
+ return Asn1Object.FromByteArray(ext.Value.GetOctets());
+ }
+ catch (Exception e)
+ {
+ throw new ArgumentException("can't convert extension", e);
+ }
+ }
+ }
+}
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