diff --git a/crypto/src/asn1/nist/NISTNamedCurves.cs b/crypto/src/asn1/nist/NISTNamedCurves.cs
new file mode 100644
index 000000000..0e82dda7a
--- /dev/null
+++ b/crypto/src/asn1/nist/NISTNamedCurves.cs
@@ -0,0 +1,108 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Sec;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Collections;
+
+namespace Org.BouncyCastle.Asn1.Nist
+{
+ /**
+ * Utility class for fetching curves using their NIST names as published in FIPS-PUB 186-3
+ */
+ public sealed class NistNamedCurves
+ {
+ private NistNamedCurves()
+ {
+ }
+
+ private static readonly IDictionary objIds = Platform.CreateHashtable();
+ private static readonly IDictionary names = Platform.CreateHashtable();
+
+ private static void DefineCurve(
+ string name,
+ DerObjectIdentifier oid)
+ {
+ objIds.Add(name, oid);
+ names.Add(oid, name);
+ }
+
+ static NistNamedCurves()
+ {
+ DefineCurve("B-571", SecObjectIdentifiers.SecT571r1);
+ DefineCurve("B-409", SecObjectIdentifiers.SecT409r1);
+ DefineCurve("B-283", SecObjectIdentifiers.SecT283r1);
+ DefineCurve("B-233", SecObjectIdentifiers.SecT233r1);
+ DefineCurve("B-163", SecObjectIdentifiers.SecT163r2);
+ DefineCurve("K-571", SecObjectIdentifiers.SecT571k1);
+ DefineCurve("K-409", SecObjectIdentifiers.SecT409k1);
+ DefineCurve("K-283", SecObjectIdentifiers.SecT283k1);
+ DefineCurve("K-233", SecObjectIdentifiers.SecT233k1);
+ DefineCurve("K-163", SecObjectIdentifiers.SecT163k1);
+ DefineCurve("P-521", SecObjectIdentifiers.SecP521r1);
+ DefineCurve("P-384", SecObjectIdentifiers.SecP384r1);
+ DefineCurve("P-256", SecObjectIdentifiers.SecP256r1);
+ DefineCurve("P-224", SecObjectIdentifiers.SecP224r1);
+ DefineCurve("P-192", SecObjectIdentifiers.SecP192r1);
+ }
+
+ public static X9ECParameters GetByName(
+ string name)
+ {
+ DerObjectIdentifier oid = (DerObjectIdentifier) objIds[
+ Platform.ToUpperInvariant(name)];
+
+ if (oid != null)
+ {
+ return GetByOid(oid);
+ }
+
+ return null;
+ }
+
+ /**
+ * return the X9ECParameters object for the named curve represented by
+ * the passed in object identifier. Null if the curve isn't present.
+ *
+ * @param oid an object identifier representing a named curve, if present.
+ */
+ public static X9ECParameters GetByOid(
+ DerObjectIdentifier oid)
+ {
+ return SecNamedCurves.GetByOid(oid);
+ }
+
+ /**
+ * return the object identifier signified by the passed in name. Null
+ * if there is no object identifier associated with name.
+ *
+ * @return the object identifier associated with name, if present.
+ */
+ public static DerObjectIdentifier GetOid(
+ string name)
+ {
+ return (DerObjectIdentifier) objIds[
+ Platform.ToUpperInvariant(name)];
+ }
+
+ /**
+ * return the named curve name represented by the given object identifier.
+ */
+ public static string GetName(
+ DerObjectIdentifier oid)
+ {
+ return (string) names[oid];
+ }
+
+ /**
+ * returns an enumeration containing the name strings for curves
+ * contained in this structure.
+ */
+ public static IEnumerable Names
+ {
+ get { return new EnumerableProxy(objIds.Keys); }
+ }
+ }
+}
diff --git a/crypto/src/asn1/nist/NISTObjectIdentifiers.cs b/crypto/src/asn1/nist/NISTObjectIdentifiers.cs
new file mode 100644
index 000000000..8eb5ed437
--- /dev/null
+++ b/crypto/src/asn1/nist/NISTObjectIdentifiers.cs
@@ -0,0 +1,65 @@
+using Org.BouncyCastle.Asn1;
+
+namespace Org.BouncyCastle.Asn1.Nist
+{
+ public sealed class NistObjectIdentifiers
+ {
+ private NistObjectIdentifiers()
+ {
+ }
+
+ //
+ // NIST
+ // iso/itu(2) joint-assign(16) us(840) organization(1) gov(101) csor(3)
+
+ //
+ // nistalgorithms(4)
+ //
+ public static readonly DerObjectIdentifier NistAlgorithm = new DerObjectIdentifier("2.16.840.1.101.3.4");
+
+ public static readonly DerObjectIdentifier HashAlgs = NistAlgorithm.Branch("2");
+
+ public static readonly DerObjectIdentifier IdSha256 = HashAlgs.Branch("1");
+ public static readonly DerObjectIdentifier IdSha384 = HashAlgs.Branch("2");
+ public static readonly DerObjectIdentifier IdSha512 = HashAlgs.Branch("3");
+ public static readonly DerObjectIdentifier IdSha224 = HashAlgs.Branch("4");
+ public static readonly DerObjectIdentifier IdSha512_224 = HashAlgs.Branch("5");
+ public static readonly DerObjectIdentifier IdSha512_256 = HashAlgs.Branch("6");
+
+ public static readonly DerObjectIdentifier Aes = new DerObjectIdentifier(NistAlgorithm + ".1");
+
+ public static readonly DerObjectIdentifier IdAes128Ecb = new DerObjectIdentifier(Aes + ".1");
+ public static readonly DerObjectIdentifier IdAes128Cbc = new DerObjectIdentifier(Aes + ".2");
+ public static readonly DerObjectIdentifier IdAes128Ofb = new DerObjectIdentifier(Aes + ".3");
+ public static readonly DerObjectIdentifier IdAes128Cfb = new DerObjectIdentifier(Aes + ".4");
+ public static readonly DerObjectIdentifier IdAes128Wrap = new DerObjectIdentifier(Aes + ".5");
+ public static readonly DerObjectIdentifier IdAes128Gcm = new DerObjectIdentifier(Aes + ".6");
+ public static readonly DerObjectIdentifier IdAes128Ccm = new DerObjectIdentifier(Aes + ".7");
+
+ public static readonly DerObjectIdentifier IdAes192Ecb = new DerObjectIdentifier(Aes + ".21");
+ public static readonly DerObjectIdentifier IdAes192Cbc = new DerObjectIdentifier(Aes + ".22");
+ public static readonly DerObjectIdentifier IdAes192Ofb = new DerObjectIdentifier(Aes + ".23");
+ public static readonly DerObjectIdentifier IdAes192Cfb = new DerObjectIdentifier(Aes + ".24");
+ public static readonly DerObjectIdentifier IdAes192Wrap = new DerObjectIdentifier(Aes + ".25");
+ public static readonly DerObjectIdentifier IdAes192Gcm = new DerObjectIdentifier(Aes + ".26");
+ public static readonly DerObjectIdentifier IdAes192Ccm = new DerObjectIdentifier(Aes + ".27");
+
+ public static readonly DerObjectIdentifier IdAes256Ecb = new DerObjectIdentifier(Aes + ".41");
+ public static readonly DerObjectIdentifier IdAes256Cbc = new DerObjectIdentifier(Aes + ".42");
+ public static readonly DerObjectIdentifier IdAes256Ofb = new DerObjectIdentifier(Aes + ".43");
+ public static readonly DerObjectIdentifier IdAes256Cfb = new DerObjectIdentifier(Aes + ".44");
+ public static readonly DerObjectIdentifier IdAes256Wrap = new DerObjectIdentifier(Aes + ".45");
+ public static readonly DerObjectIdentifier IdAes256Gcm = new DerObjectIdentifier(Aes + ".46");
+ public static readonly DerObjectIdentifier IdAes256Ccm = new DerObjectIdentifier(Aes + ".47");
+
+ //
+ // signatures
+ //
+ public static readonly DerObjectIdentifier IdDsaWithSha2 = new DerObjectIdentifier(NistAlgorithm + ".3");
+
+ public static readonly DerObjectIdentifier DsaWithSha224 = new DerObjectIdentifier(IdDsaWithSha2 + ".1");
+ public static readonly DerObjectIdentifier DsaWithSha256 = new DerObjectIdentifier(IdDsaWithSha2 + ".2");
+ public static readonly DerObjectIdentifier DsaWithSha384 = new DerObjectIdentifier(IdDsaWithSha2 + ".3");
+ public static readonly DerObjectIdentifier DsaWithSha512 = new DerObjectIdentifier(IdDsaWithSha2 + ".4");
+ }
+}
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