1 files changed, 104 insertions, 0 deletions
diff --git a/crypto/src/asn1/x509/X509NameTokenizer.cs b/crypto/src/asn1/x509/X509NameTokenizer.cs
new file mode 100644
index 000000000..ab5529535
--- /dev/null
+++ b/crypto/src/asn1/x509/X509NameTokenizer.cs
@@ -0,0 +1,104 @@
+using System.Text;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+    /**
+     * class for breaking up an X500 Name into it's component tokens, ala
+     * java.util.StringTokenizer. We need this class as some of the
+     * lightweight Java environment don't support classes like
+     * StringTokenizer.
+     */
+    public class X509NameTokenizer
+    {
+        private string			value;
+        private int				index;
+        private char			separator;
+        private StringBuilder	buffer = new StringBuilder();
+
+		public X509NameTokenizer(
+            string oid)
+            : this(oid, ',')
+        {
+        }
+
+		public X509NameTokenizer(
+            string	oid,
+            char	separator)
+        {
+            this.value = oid;
+            this.index = -1;
+            this.separator = separator;
+        }
+
+		public bool HasMoreTokens()
+        {
+            return index != value.Length;
+        }
+
+		public string NextToken()
+        {
+            if (index == value.Length)
+            {
+                return null;
+            }
+
+            int end = index + 1;
+            bool quoted = false;
+            bool escaped = false;
+
+			buffer.Remove(0, buffer.Length);
+
+			while (end != value.Length)
+            {
+                char c = value[end];
+
+				if (c == '"')
+                {
+                    if (!escaped)
+                    {
+                        quoted = !quoted;
+                    }
+                    else
+                    {
+                        buffer.Append(c);
+						escaped = false;
+                    }
+                }
+                else
+                {
+                    if (escaped || quoted)
+                    {
+						if (c == '#' && buffer[buffer.Length - 1] == '=')
+						{
+							buffer.Append('\\');
+						}
+						else if (c == '+' && separator != '+')
+						{
+							buffer.Append('\\');
+						}
+						buffer.Append(c);
+                        escaped = false;
+                    }
+                    else if (c == '\\')
+                    {
+                        escaped = true;
+                    }
+                    else if (c == separator)
+                    {
+                        break;
+                    }
+                    else
+                    {
+                        buffer.Append(c);
+                    }
+                }
+
+				end++;
+            }
+
+			index = end;
+
+			return buffer.ToString().Trim();
+        }
+    }
+}