1 files changed, 67 insertions, 0 deletions
diff --git a/mail/src/main/java/org/spongycastle/mail/smime/util/CRLFOutputStream.java b/mail/src/main/java/org/spongycastle/mail/smime/util/CRLFOutputStream.java
new file mode 100644
index 00000000..b11583d0
--- /dev/null
+++ b/mail/src/main/java/org/spongycastle/mail/smime/util/CRLFOutputStream.java
@@ -0,0 +1,67 @@
+package org.bouncycastle.mail.smime.util;
+
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+public class CRLFOutputStream extends FilterOutputStream
+{
+    protected int lastb;
+    protected static byte newline[];
+
+    public CRLFOutputStream(OutputStream outputstream)
+    {
+        super(outputstream);
+        lastb = -1;
+    }
+
+    public void write(int i)
+        throws IOException
+    {
+        if (i == '\r')
+        {
+            out.write(newline);
+        }
+        else if (i == '\n')
+        {
+            if (lastb != '\r')
+            {
+                out.write(newline);
+            }
+        }
+        else
+        {
+           out.write(i);
+        }
+        
+        lastb = i;
+    }
+
+    public void write(byte[] buf)
+        throws IOException
+    {
+        this.write(buf, 0, buf.length);
+    }
+
+    public void write(byte buf[], int off, int len)
+        throws IOException
+    {
+        for (int i = off; i != off + len; i++)
+        {
+            this.write(buf[i]);
+        }
+    }
+
+    public void writeln()
+        throws IOException
+    {
+        super.out.write(newline);
+    }
+
+    static 
+    {
+        newline = new byte[2];
+        newline[0] = '\r';
+        newline[1] = '\n';
+    }
+}