Added command line tool for OID to DER conversion function

scripts/oid2der.c

@@ -0,0 +1,31 @@
+
+#include <stdio.h>
+#include <asn1/asn1.h>
+
+/**
+ * convert string OID to DER encoding
+ */
+int main(int argc, char *argv[])
+{
+	int i, nr = 0;
+	chunk_t oid;
+
+	while (argc > ++nr)
+	{
+		oid = asn1_oid_from_string(argv[nr]);
+		if (oid.len)
+		{
+			for (i = 0; i < oid.len; i++)
+			{
+				printf("0x%02x,", oid.ptr[i]);
+			}
+			printf("\n");
+			free(oid.ptr);
+		}
+		else
+		{
+			return 1;
+		}
+	}
+	return 0;
+}