diff --git a/Crypto/src/openpgp/PgpSecretKeyRingBundle.cs b/Crypto/src/openpgp/PgpSecretKeyRingBundle.cs
new file mode 100644
index 000000000..18636dd65
--- /dev/null
+++ b/Crypto/src/openpgp/PgpSecretKeyRingBundle.cs
@@ -0,0 +1,281 @@
+using System;
+using System.Collections;
+using System.Globalization;
+using System.IO;
+
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Collections;
+
+namespace Org.BouncyCastle.Bcpg.OpenPgp
+{
+ /// <remarks>
+ /// Often a PGP key ring file is made up of a succession of master/sub-key key rings.
+ /// If you want to read an entire secret key file in one hit this is the class for you.
+ /// </remarks>
+ public class PgpSecretKeyRingBundle
+ {
+ private readonly IDictionary secretRings;
+ private readonly IList order;
+
+ private PgpSecretKeyRingBundle(
+ IDictionary secretRings,
+ IList order)
+ {
+ this.secretRings = secretRings;
+ this.order = order;
+ }
+
+ public PgpSecretKeyRingBundle(
+ byte[] encoding)
+ : this(new MemoryStream(encoding, false))
+ {
+ }
+
+ /// <summary>Build a PgpSecretKeyRingBundle from the passed in input stream.</summary>
+ /// <param name="inputStream">Input stream containing data.</param>
+ /// <exception cref="IOException">If a problem parsing the stream occurs.</exception>
+ /// <exception cref="PgpException">If an object is encountered which isn't a PgpSecretKeyRing.</exception>
+ public PgpSecretKeyRingBundle(
+ Stream inputStream)
+ : this(new PgpObjectFactory(inputStream).AllPgpObjects())
+ {
+ }
+
+ public PgpSecretKeyRingBundle(
+ IEnumerable e)
+ {
+ this.secretRings = Platform.CreateHashtable();
+ this.order = Platform.CreateArrayList();
+
+ foreach (object obj in e)
+ {
+ PgpSecretKeyRing pgpSecret = obj as PgpSecretKeyRing;
+
+ if (pgpSecret == null)
+ {
+ throw new PgpException(obj.GetType().FullName + " found where PgpSecretKeyRing expected");
+ }
+
+ long key = pgpSecret.GetPublicKey().KeyId;
+ secretRings.Add(key, pgpSecret);
+ order.Add(key);
+ }
+ }
+
+ [Obsolete("Use 'Count' property instead")]
+ public int Size
+ {
+ get { return order.Count; }
+ }
+
+ /// <summary>Return the number of rings in this collection.</summary>
+ public int Count
+ {
+ get { return order.Count; }
+ }
+
+ /// <summary>Allow enumeration of the secret key rings making up this collection.</summary>
+ public IEnumerable GetKeyRings()
+ {
+ return new EnumerableProxy(secretRings.Values);
+ }
+
+ /// <summary>Allow enumeration of the key rings associated with the passed in userId.</summary>
+ /// <param name="userId">The user ID to be matched.</param>
+ /// <returns>An <c>IEnumerable</c> of key rings which matched (possibly none).</returns>
+ public IEnumerable GetKeyRings(
+ string userId)
+ {
+ return GetKeyRings(userId, false, false);
+ }
+
+ /// <summary>Allow enumeration of the key rings associated with the passed in userId.</summary>
+ /// <param name="userId">The user ID to be matched.</param>
+ /// <param name="matchPartial">If true, userId need only be a substring of an actual ID string to match.</param>
+ /// <returns>An <c>IEnumerable</c> of key rings which matched (possibly none).</returns>
+ public IEnumerable GetKeyRings(
+ string userId,
+ bool matchPartial)
+ {
+ return GetKeyRings(userId, matchPartial, false);
+ }
+
+ /// <summary>Allow enumeration of the key rings associated with the passed in userId.</summary>
+ /// <param name="userId">The user ID to be matched.</param>
+ /// <param name="matchPartial">If true, userId need only be a substring of an actual ID string to match.</param>
+ /// <param name="ignoreCase">If true, case is ignored in user ID comparisons.</param>
+ /// <returns>An <c>IEnumerable</c> of key rings which matched (possibly none).</returns>
+ public IEnumerable GetKeyRings(
+ string userId,
+ bool matchPartial,
+ bool ignoreCase)
+ {
+ IList rings = Platform.CreateArrayList();
+
+ if (ignoreCase)
+ {
+ userId = userId.ToLowerInvariant();
+ }
+
+ foreach (PgpSecretKeyRing secRing in GetKeyRings())
+ {
+ foreach (string nextUserID in secRing.GetSecretKey().UserIds)
+ {
+ string next = nextUserID;
+ if (ignoreCase)
+ {
+ next = next.ToLowerInvariant();
+ }
+
+ if (matchPartial)
+ {
+ if (next.IndexOf(userId) > -1)
+ {
+ rings.Add(secRing);
+ }
+ }
+ else
+ {
+ if (next.Equals(userId))
+ {
+ rings.Add(secRing);
+ }
+ }
+ }
+ }
+
+ return new EnumerableProxy(rings);
+ }
+
+ /// <summary>Return the PGP secret key associated with the given key id.</summary>
+ /// <param name="keyId">The ID of the secret key to return.</param>
+ public PgpSecretKey GetSecretKey(
+ long keyId)
+ {
+ foreach (PgpSecretKeyRing secRing in GetKeyRings())
+ {
+ PgpSecretKey sec = secRing.GetSecretKey(keyId);
+
+ if (sec != null)
+ {
+ return sec;
+ }
+ }
+
+ return null;
+ }
+
+ /// <summary>Return the secret key ring which contains the key referred to by keyId</summary>
+ /// <param name="keyId">The ID of the secret key</param>
+ public PgpSecretKeyRing GetSecretKeyRing(
+ long keyId)
+ {
+ long id = keyId;
+
+ if (secretRings.Contains(id))
+ {
+ return (PgpSecretKeyRing) secretRings[id];
+ }
+
+ foreach (PgpSecretKeyRing secretRing in GetKeyRings())
+ {
+ PgpSecretKey secret = secretRing.GetSecretKey(keyId);
+
+ if (secret != null)
+ {
+ return secretRing;
+ }
+ }
+
+ return null;
+ }
+
+ /// <summary>
+ /// Return true if a key matching the passed in key ID is present, false otherwise.
+ /// </summary>
+ /// <param name="keyID">key ID to look for.</param>
+ public bool Contains(
+ long keyID)
+ {
+ return GetSecretKey(keyID) != null;
+ }
+
+ public byte[] GetEncoded()
+ {
+ MemoryStream bOut = new MemoryStream();
+
+ Encode(bOut);
+
+ return bOut.ToArray();
+ }
+
+ public void Encode(
+ Stream outStr)
+ {
+ BcpgOutputStream bcpgOut = BcpgOutputStream.Wrap(outStr);
+
+ foreach (long key in order)
+ {
+ PgpSecretKeyRing pub = (PgpSecretKeyRing) secretRings[key];
+
+ pub.Encode(bcpgOut);
+ }
+ }
+
+ /// <summary>
+ /// Return a new bundle containing the contents of the passed in bundle and
+ /// the passed in secret key ring.
+ /// </summary>
+ /// <param name="bundle">The <c>PgpSecretKeyRingBundle</c> the key ring is to be added to.</param>
+ /// <param name="secretKeyRing">The key ring to be added.</param>
+ /// <returns>A new <c>PgpSecretKeyRingBundle</c> merging the current one with the passed in key ring.</returns>
+ /// <exception cref="ArgumentException">If the keyId for the passed in key ring is already present.</exception>
+ public static PgpSecretKeyRingBundle AddSecretKeyRing(
+ PgpSecretKeyRingBundle bundle,
+ PgpSecretKeyRing secretKeyRing)
+ {
+ long key = secretKeyRing.GetPublicKey().KeyId;
+
+ if (bundle.secretRings.Contains(key))
+ {
+ throw new ArgumentException("Collection already contains a key with a keyId for the passed in ring.");
+ }
+
+ IDictionary newSecretRings = Platform.CreateHashtable(bundle.secretRings);
+ IList newOrder = Platform.CreateArrayList(bundle.order);
+
+ newSecretRings[key] = secretKeyRing;
+ newOrder.Add(key);
+
+ return new PgpSecretKeyRingBundle(newSecretRings, newOrder);
+ }
+
+ /// <summary>
+ /// Return a new bundle containing the contents of the passed in bundle with
+ /// the passed in secret key ring removed.
+ /// </summary>
+ /// <param name="bundle">The <c>PgpSecretKeyRingBundle</c> the key ring is to be removed from.</param>
+ /// <param name="secretKeyRing">The key ring to be removed.</param>
+ /// <returns>A new <c>PgpSecretKeyRingBundle</c> not containing the passed in key ring.</returns>
+ /// <exception cref="ArgumentException">If the keyId for the passed in key ring is not present.</exception>
+ public static PgpSecretKeyRingBundle RemoveSecretKeyRing(
+ PgpSecretKeyRingBundle bundle,
+ PgpSecretKeyRing secretKeyRing)
+ {
+ long key = secretKeyRing.GetPublicKey().KeyId;
+
+ if (!bundle.secretRings.Contains(key))
+ {
+ throw new ArgumentException("Collection does not contain a key with a keyId for the passed in ring.");
+ }
+
+ IDictionary newSecretRings = Platform.CreateHashtable(bundle.secretRings);
+ IList newOrder = Platform.CreateArrayList(bundle.order);
+
+ newSecretRings.Remove(key);
+ newOrder.Remove(key);
+
+ return new PgpSecretKeyRingBundle(newSecretRings, newOrder);
+ }
+ }
+}
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