1 files changed, 30 insertions, 0 deletions
diff --git a/idea.c b/idea.c
index 464dc74..54881f8 100644
--- a/idea.c
+++ b/idea.c
@@ -11,6 +11,36 @@
 **
 */
 
+/*
+** DEFINES
+*/
+#define IDEAKEYSIZE 16
+#define IDEABLOCKSIZE 8
+#define ROUNDS 8
+#define KEYLEN (6*ROUNDS+4)
+
+/*
+** MACROS
+*/
+#define low16(x) ((x) & 0x0FFFF)
+#define MUL(x,y) (x=mul(low16(x),y))
+
+
+typedef uint16_t IDEAkey[KEYLEN];
+
+/*
+** PROTOTYPES
+*/
+static unsigned long DoIDEAIteration(unsigned char *plain1,
+	unsigned char *crypt1, unsigned char *plain2,
+	unsigned long arraysize, unsigned long nloops,
+	IDEAkey Z, IDEAkey DK);
+static uint16_t mul(register uint16_t a, register uint16_t b);
+static uint16_t inv(uint16_t x);
+static void en_key_idea(uint16_t userkey[8], IDEAkey Z);
+static void de_key_idea(IDEAkey Z, IDEAkey DK);
+static void cipher_idea(uint16_t in[4], uint16_t out[4], IDEAkey Z);
+
 /***********
 ** DoIDEA **
 ************