1 files changed, 77 insertions, 0 deletions
diff --git a/libraries/spongycastle/mail/src/main/java/org/spongycastle/mail/smime/examples/ExampleUtils.java b/libraries/spongycastle/mail/src/main/java/org/spongycastle/mail/smime/examples/ExampleUtils.java
new file mode 100644
index 000000000..10c0f06c2
--- /dev/null
+++ b/libraries/spongycastle/mail/src/main/java/org/spongycastle/mail/smime/examples/ExampleUtils.java
@@ -0,0 +1,77 @@
+package org.bouncycastle.mail.smime.examples;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.KeyStore;
+import java.util.Enumeration;
+
+import javax.mail.MessagingException;
+import javax.mail.internet.MimeBodyPart;
+
+public class ExampleUtils
+{
+    /**
+     * Dump the content of the passed in BodyPart to the file fileName.
+     *
+     * @throws MessagingException
+     * @throws IOException
+     */
+    public static void dumpContent(
+        MimeBodyPart bodyPart, 
+        String fileName) 
+        throws MessagingException, IOException
+    {
+        //
+        // print mime type of compressed content
+        //
+        System.out.println("content type: " + bodyPart.getContentType());
+        
+        //
+        // recover the compressed content
+        //
+        OutputStream out = new FileOutputStream(fileName);
+        InputStream in = bodyPart.getInputStream();
+        
+        byte[] buf = new byte[10000];
+        int    len;
+        
+        while ((len = in.read(buf, 0, buf.length)) > 0)
+        {
+            out.write(buf, 0, len);
+        }
+        
+        out.close();
+    }
+    
+    public static String findKeyAlias(
+        KeyStore store, 
+        String storeName, 
+        char[] password) 
+        throws Exception
+    {
+        store.load(new FileInputStream(storeName), password);
+    
+        Enumeration e = store.aliases();
+        String      keyAlias = null;
+    
+        while (e.hasMoreElements())
+        {
+            String  alias = (String)e.nextElement();
+    
+            if (store.isKeyEntry(alias))
+            {
+                keyAlias = alias;
+            }
+        }
+    
+        if (keyAlias == null)
+        {
+            throw new IllegalArgumentException("can't find a private key in keyStore: " + storeName);
+        }
+        
+        return keyAlias;
+    }
+}