From d631848d839076eb9522631091c3f5ca0c12fb44 Mon Sep 17 00:00:00 2001
From: Simon Freiermuth <simon.freiermuth1@students.fhnw.ch>
Date: Thu, 17 Mar 2022 15:03:39 +0100
Subject: [PATCH] =?UTF-8?q?bit=20Flipper=20im=20the=20making=20?=
 =?UTF-8?q?=F0=9F=90=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 bin/main/ch/fhnw/kry/SPN.class         | Bin 2005 -> 2246 bytes
 bin/test/ch/fhnw/kry/SPNTest.class     | Bin 1061 -> 1287 bytes
 src/main/java/ch/fhnw/kry/SPN.java     |  10 ++++++++++
 src/test/java/ch/fhnw/kry/SPNTest.java |  17 +++++++++++++++++
 4 files changed, 27 insertions(+)

diff --git a/bin/main/ch/fhnw/kry/SPN.class b/bin/main/ch/fhnw/kry/SPN.class
index e5a110b781695a9a792f4e01d4ad11b402c0f575..317df834b8e04d0d149ee6497600ddb0998a37c3 100644
GIT binary patch
delta 297
zcmYk1y-EW?6otRLGugxi*(4B~XeYYqMPyMiiy-TN)JD4%8w(+jfL8G#?0f+m8_~uT
zmKOHDjff{Mg2mkP%{kmN%xC=Gh(5l@Z@?NSPf^b$wZV1K&n|}pBTVu<@8pIRI_HKT
zUiG`BWOt|T%&N~XuI6uzZFVqX^}ON<rD@yO<JpUw(LGi7fcMLO;>`VbDlK28(|=Jg
zT6K@wb}VQ%)dgK?#yp#>u*IUB_3{N0I=WGivLwsIDZ8TJm-a+X%L)4;uZkHCL=|%7
e4Z?WCzNp(|My7uT94ZLtaU_jY*rd&IIQ0WBUn)KT

delta 56
zcmX>mc$J^))W2Q(7#J9A8T>YK1u{==WsYEE+kB6igGG{w!3!wC#Nf@~1Ejea7#V~Z
Jq#1nKI03*73rqk2

diff --git a/bin/test/ch/fhnw/kry/SPNTest.class b/bin/test/ch/fhnw/kry/SPNTest.class
index b5648b6d6f125bfefbc8ff36da7085fa615ed552..ec17f8356d549ebb4dc657897e5447d840227256 100644
GIT binary patch
delta 265
zcmXAj%}N775QM)OXEw`Z6E{fIL!wd8#H>G{BKWhb#?yi?;L)Ra5hI8v@#F(|^qdC>
zf{KC<;6sTe9=fKgr>nY0@nZ<zKObK}&dE4j+D<&YJ--@U+zbN^ii86W4N<Qw%azh#
z@1Cx0&$yRo`(W<TZ-ix1{s=>=x1t*1q+#uo#@QQFr)kL3q{v#%zmo5`tmWMw@$II2
zXSUt+!m$jNAY3FCc7=VaWYk$_h7CGwvdk8%Y^x7t@xO(Hnq<rpbIj|Gsv>q-P+VPl
XPi#T~)9i~m#nd<w^O`)C&ocN09LOL_

delta 40
vcmZqYTFSw7>ff$?3=9mm40ap2vY95&U{Ymd-n@^gk&%;;!3HS7#9#{m06hu(

diff --git a/src/main/java/ch/fhnw/kry/SPN.java b/src/main/java/ch/fhnw/kry/SPN.java
index d0f5e49..a4a31db 100644
--- a/src/main/java/ch/fhnw/kry/SPN.java
+++ b/src/main/java/ch/fhnw/kry/SPN.java
@@ -61,4 +61,14 @@ public class SPN {
         return x;
     }
 
+    public int swapBits(int x, int a, int b) {
+        int tmpA = (x & (0x1 << 15 - a)) == 0 ? 0 : 1;
+        int tmpB = (x & (0x1 << 15 - b)) == 0 ? 0 : 1;
+
+        x = tmpA == 0 ? (x & 0x1 << 15 - b) & 0b0 : (x & 0x1 << 15 - b) & ~0b0;
+
+
+        return 0;
+    }
+
 }
diff --git a/src/test/java/ch/fhnw/kry/SPNTest.java b/src/test/java/ch/fhnw/kry/SPNTest.java
index 3a29036..63952b1 100644
--- a/src/test/java/ch/fhnw/kry/SPNTest.java
+++ b/src/test/java/ch/fhnw/kry/SPNTest.java
@@ -33,4 +33,21 @@ class SPNTest {
 
         // System.out.print(Integer.toHexString(spn.substitution(x)));
     }
+
+    @Test
+    void swapBits() {
+        var spn = new SPN();
+
+        // given 
+        int x = 0xA;
+        int r = 0xC;
+
+        // when
+        int y = spn.swapBits(x, 1, 2);
+        int yy = spn.swapBits(x, 2, 1);
+
+        // then
+        assertEquals(r, y);
+        assertEquals(r, yy);
+    }
 }