--- dessid.c.orig	2008-04-22 20:57:33.000000000 +0000
+++ dessid.c	2008-07-22 14:33:59.000000000 +0000
@@ -13,6 +13,9 @@
 *           - anyone who wants full source code should look at the GUI version
 *           - or Tomas's eirwep code
 *
+*  30/09/07 - www.pixelbeat.org - added linux support.
+*             To compile on unix: gcc dessid.c -l crypto -o dessid
+*
 *  21/09/07 - removed obsolete stuff, added new SSID routine and technical
 *             details of flaw
 *
@@ -25,12 +28,19 @@
 #include <string.h>
 #include <stdlib.h>
 
-#include "sha1.h"
-
-#define SHA1Init SHA1Reset
-#define SHA1Update SHA1Input
-#define SHA1Final SHA1Result
-#define SHA1_CTX SHA1Context
+#ifdef linux
+  #include <openssl/sha.h>
+  #define SHA1Init SHA1_Init
+  #define SHA1Update SHA1_Update
+  #define SHA1Final(x,y) SHA1_Final(y,x)
+  #define SHA1_CTX SHA_CTX
+#else
+  #include "sha1.h"
+  #define SHA1Init SHA1Reset
+  #define SHA1Update SHA1Input
+  #define SHA1Final SHA1Result
+  #define SHA1_CTX SHA1Context
+#endif
 
 #define MAX_SSID_OCTETS 8
 #define MAX_SERIAL_NUMBER 16