Add a comment indicating the copyright and license to each source file.

apps/makekeys.c

diff --git a/apps/makekeys.c b/apps/makekeys.c
index 0b02381..9e88cde 100644
--- a/apps/makekeys.c
+++ b/apps/makekeys.c
@@ -1,3 +1,5 @@
+/* Copyright 2013, Kenneth MacKay. Licensed under the BSD 2-clause license. */
+
 #if !TARGET_LPC11XX
 
 #include "ecc.h"

ecc.c

diff --git a/ecc.c b/ecc.c
index 6132c9c..f559ec7 100644
--- a/ecc.c
+++ b/ecc.c
@@ -1,3 +1,5 @@
+/* Copyright 2013, Kenneth MacKay. Licensed under the BSD 2-clause license. */
+
 #include "ecc.h"
 
 #include <string.h>

ecc.h

diff --git a/ecc.h b/ecc.h
index a512b77..72e815e 100644
--- a/ecc.h
+++ b/ecc.h
@@ -1,3 +1,5 @@
+/* Copyright 2013 Kenneth MacKay. Licensed under the BSD 2-clause license. */
+
 #ifndef _MICRO_ECC_H_
 #define _MICRO_ECC_H_
 

test/speedtest.c

diff --git a/test/speedtest.c b/test/speedtest.c
index a863cdf..7590184 100644
--- a/test/speedtest.c
+++ b/test/speedtest.c
@@ -1,4 +1,4 @@
-
+/* Copyright 2013, Kenneth MacKay. Licensed under the BSD 2-clause license. */
 
 #if TARGET_LPC11XX
 #include "peripherals/uart.h"

test/verify_ecdh.c

diff --git a/test/verify_ecdh.c b/test/verify_ecdh.c
index 2708002..fa3cdd5 100644
--- a/test/verify_ecdh.c
+++ b/test/verify_ecdh.c
@@ -1,3 +1,5 @@
+/* Copyright 2013, Kenneth MacKay. Licensed under the BSD 2-clause license. */
+
 #if !TARGET_LPC11XX
 
 #include "ecc.h"

test/verify_ecdsa.c

diff --git a/test/verify_ecdsa.c b/test/verify_ecdsa.c
index c7f6753..2c4abe0 100644
--- a/test/verify_ecdsa.c
+++ b/test/verify_ecdsa.c
@@ -1,3 +1,5 @@
+/* Copyright 2013, Kenneth MacKay. Licensed under the BSD 2-clause license. */
+
 #if !TARGET_LPC11XX
 
 #include "ecc.h"