diff --git a/Crypto/src/asn1/esf/SignerLocation.cs b/Crypto/src/asn1/esf/SignerLocation.cs
new file mode 100644
index 000000000..d2cef51bb
--- /dev/null
+++ b/Crypto/src/asn1/esf/SignerLocation.cs
@@ -0,0 +1,144 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+
+namespace Org.BouncyCastle.Asn1.Esf
+{
+ /**
+ * Signer-Location attribute (RFC3126).
+ *
+ * <pre>
+ * SignerLocation ::= SEQUENCE {
+ * countryName [0] DirectoryString OPTIONAL,
+ * localityName [1] DirectoryString OPTIONAL,
+ * postalAddress [2] PostalAddress OPTIONAL }
+ *
+ * PostalAddress ::= SEQUENCE SIZE(1..6) OF DirectoryString
+ * </pre>
+ */
+ public class SignerLocation
+ : Asn1Encodable
+ {
+ // TODO Should these be using DirectoryString?
+ private DerUtf8String countryName;
+ private DerUtf8String localityName;
+ private Asn1Sequence postalAddress;
+
+ public SignerLocation(
+ Asn1Sequence seq)
+ {
+ foreach (Asn1TaggedObject obj in seq)
+ {
+ switch (obj.TagNo)
+ {
+ case 0:
+ this.countryName = DerUtf8String.GetInstance(obj, true);
+ break;
+ case 1:
+ this.localityName = DerUtf8String.GetInstance(obj, true);
+ break;
+ case 2:
+ bool isExplicit = obj.IsExplicit(); // handle erroneous implicitly tagged sequences
+ this.postalAddress = Asn1Sequence.GetInstance(obj, isExplicit);
+ if (postalAddress != null && postalAddress.Count > 6)
+ throw new ArgumentException("postal address must contain less than 6 strings");
+ break;
+ default:
+ throw new ArgumentException("illegal tag");
+ }
+ }
+ }
+
+ public SignerLocation(
+ DerUtf8String countryName,
+ DerUtf8String localityName,
+ Asn1Sequence postalAddress)
+ {
+ if (postalAddress != null && postalAddress.Count > 6)
+ {
+ throw new ArgumentException("postal address must contain less than 6 strings");
+ }
+
+ if (countryName != null)
+ {
+ this.countryName = DerUtf8String.GetInstance(countryName.ToAsn1Object());
+ }
+
+ if (localityName != null)
+ {
+ this.localityName = DerUtf8String.GetInstance(localityName.ToAsn1Object());
+ }
+
+ if (postalAddress != null)
+ {
+ this.postalAddress = (Asn1Sequence) postalAddress.ToAsn1Object();
+ }
+ }
+
+ public static SignerLocation GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is SignerLocation)
+ {
+ return (SignerLocation) obj;
+ }
+
+ return new SignerLocation(Asn1Sequence.GetInstance(obj));
+ }
+
+ public DerUtf8String CountryName
+ {
+ get { return countryName; }
+ }
+
+ public DerUtf8String LocalityName
+ {
+ get { return localityName; }
+ }
+
+ public Asn1Sequence PostalAddress
+ {
+ get { return postalAddress; }
+ }
+
+ /**
+ * <pre>
+ * SignerLocation ::= SEQUENCE {
+ * countryName [0] DirectoryString OPTIONAL,
+ * localityName [1] DirectoryString OPTIONAL,
+ * postalAddress [2] PostalAddress OPTIONAL }
+ *
+ * PostalAddress ::= SEQUENCE SIZE(1..6) OF DirectoryString
+ *
+ * DirectoryString ::= CHOICE {
+ * teletexString TeletexString (SIZE (1..MAX)),
+ * printableString PrintableString (SIZE (1..MAX)),
+ * universalString UniversalString (SIZE (1..MAX)),
+ * utf8String UTF8String (SIZE (1.. MAX)),
+ * bmpString BMPString (SIZE (1..MAX)) }
+ * </pre>
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector();
+
+ if (countryName != null)
+ {
+ v.Add(new DerTaggedObject(true, 0, countryName));
+ }
+
+ if (localityName != null)
+ {
+ v.Add(new DerTaggedObject(true, 1, localityName));
+ }
+
+ if (postalAddress != null)
+ {
+ v.Add(new DerTaggedObject(true, 2, postalAddress));
+ }
+
+ return new DerSequence(v);
+ }
+ }
+}
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