1 files changed, 64 insertions, 0 deletions
diff --git a/crypto/src/pkcs/EncryptedPrivateKeyInfoFactory.cs b/crypto/src/pkcs/EncryptedPrivateKeyInfoFactory.cs
new file mode 100644
index 000000000..b6b7bac65
--- /dev/null
+++ b/crypto/src/pkcs/EncryptedPrivateKeyInfoFactory.cs
@@ -0,0 +1,64 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Pkcs
+{
+    public sealed class EncryptedPrivateKeyInfoFactory
+    {
+        private EncryptedPrivateKeyInfoFactory()
+        {
+        }
+
+        public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
+            DerObjectIdentifier		algorithm,
+            char[]					passPhrase,
+            byte[]					salt,
+            int						iterationCount,
+            AsymmetricKeyParameter	key)
+        {
+            return CreateEncryptedPrivateKeyInfo(
+                algorithm.Id, passPhrase, salt, iterationCount,
+                PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
+        }
+
+        public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
+            string					algorithm,
+            char[]					passPhrase,
+            byte[]					salt,
+            int						iterationCount,
+            AsymmetricKeyParameter	key)
+        {
+            return CreateEncryptedPrivateKeyInfo(
+                algorithm, passPhrase, salt, iterationCount,
+                PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
+        }
+
+        public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
+            string			algorithm,
+            char[]			passPhrase,
+            byte[]			salt,
+            int				iterationCount,
+            PrivateKeyInfo	keyInfo)
+        {
+            IBufferedCipher cipher = PbeUtilities.CreateEngine(algorithm) as IBufferedCipher;
+            if (cipher == null)
+                throw new Exception("Unknown encryption algorithm: " + algorithm);
+
+            Asn1Encodable pbeParameters = PbeUtilities.GenerateAlgorithmParameters(
+                algorithm, salt, iterationCount);
+            ICipherParameters cipherParameters = PbeUtilities.GenerateCipherParameters(
+                algorithm, passPhrase, pbeParameters);
+            cipher.Init(true, cipherParameters);
+            byte[] encoding = cipher.DoFinal(keyInfo.GetEncoded());
+
+            DerObjectIdentifier oid = PbeUtilities.GetObjectIdentifier(algorithm);
+            AlgorithmIdentifier algID = new AlgorithmIdentifier(oid, pbeParameters);
+            return new EncryptedPrivateKeyInfo(algID, encoding);
+        }
+    }
+}