1 files changed, 76 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/pkcs/PKCS8EncryptedPrivateKeyInfo.java b/pkix/src/main/java/org/spongycastle/pkcs/PKCS8EncryptedPrivateKeyInfo.java
new file mode 100644
index 00000000..1f41fb67
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/pkcs/PKCS8EncryptedPrivateKeyInfo.java
@@ -0,0 +1,76 @@
+package org.spongycastle.pkcs;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.pkcs.EncryptedPrivateKeyInfo;
+import org.spongycastle.asn1.pkcs.PrivateKeyInfo;
+import org.spongycastle.cert.CertIOException;
+import org.spongycastle.operator.InputDecryptor;
+import org.spongycastle.operator.InputDecryptorProvider;
+import org.spongycastle.util.io.Streams;
+
+/**
+ * Holding class for a PKCS#8 EncryptedPrivateKeyInfo structure.
+ */
+public class PKCS8EncryptedPrivateKeyInfo
+{
+    private EncryptedPrivateKeyInfo encryptedPrivateKeyInfo;
+
+    private static EncryptedPrivateKeyInfo parseBytes(byte[] pkcs8Encoding)
+        throws IOException
+    {
+        try
+        {
+            return EncryptedPrivateKeyInfo.getInstance(ASN1Primitive.fromByteArray(pkcs8Encoding));
+        }
+        catch (ClassCastException e)
+        {
+            throw new CertIOException("malformed data: " + e.getMessage(), e);
+        }
+        catch (IllegalArgumentException e)
+        {
+            throw new CertIOException("malformed data: " + e.getMessage(), e);
+        }
+    }
+
+    public PKCS8EncryptedPrivateKeyInfo(EncryptedPrivateKeyInfo encryptedPrivateKeyInfo)
+    {
+        this.encryptedPrivateKeyInfo = encryptedPrivateKeyInfo;
+    }
+
+    public PKCS8EncryptedPrivateKeyInfo(byte[] encryptedPrivateKeyInfo)
+        throws IOException
+    {
+        this(parseBytes(encryptedPrivateKeyInfo));
+    }
+
+    public EncryptedPrivateKeyInfo toASN1Structure()
+    {
+         return encryptedPrivateKeyInfo;
+    }
+
+    public byte[] getEncoded()
+        throws IOException
+    {
+        return encryptedPrivateKeyInfo.getEncoded();
+    }
+
+    public PrivateKeyInfo decryptPrivateKeyInfo(InputDecryptorProvider inputDecryptorProvider)
+        throws PKCSException
+    {
+        try
+        {
+            InputDecryptor decrytor = inputDecryptorProvider.get(encryptedPrivateKeyInfo.getEncryptionAlgorithm());
+
+            ByteArrayInputStream encIn = new ByteArrayInputStream(encryptedPrivateKeyInfo.getEncryptedData());
+
+            return PrivateKeyInfo.getInstance(Streams.readAll(decrytor.getInputStream(encIn)));
+        }
+        catch (Exception e)
+        {
+            throw new PKCSException("unable to read encrypted data: " + e.getMessage(), e);
+        }
+    }
+}