From 62fa141050aa054183fb781fed8e782f99e6072f Mon Sep 17 00:00:00 2001
From: Benedict <benedict@0xb8000.de>
Date: Thu, 11 Aug 2016 17:55:46 +0200
Subject: set3, completed challenge 21

---
 lib/lib3.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'lib/lib3.h')

diff --git a/lib/lib3.h b/lib/lib3.h
index 3078cfe..8adbbb9 100644
--- a/lib/lib3.h
+++ b/lib/lib3.h
@@ -8,9 +8,26 @@
 
 #define BLOCKSIZE 16
 
+#define MT_19937_N 624
+// needed for initialization
+#define MT_19937_F 0x6C078965
+// word size
+#define MT_19937_W 32
+#define MT_19937_UPPER_MASK 0x80000000
+#define MT_19937_LOWER_MASK 0x7fffffff
+
+struct mt_19937_state {
+	unsigned int mt[MT_19937_N];
+	unsigned int index;
+};
+
+struct mt_19937_state __global_mt_19937;
+
 char *challenge17_encrypt(int *length);
 int cbc_padding_oracle(char *encrypted, int length);
 int aes_ctr(char *in, int length_in, char *out, char *string_key, char *nonce);
 
+void mt_19937_seed(unsigned int seed);
+int mt_19937();
 
 #endif
-- 
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