From 582cea881345811217110dc551c459b9b0187b4b Mon Sep 17 00:00:00 2001
From: Aishwarya0601 <69068161+Aishwarya0601@users.noreply.github.com>
Date: Tue, 16 Nov 2021 00:45:12 +0530
Subject: [PATCH 1/4] Add implementation of Vigenere Cipher Encryption

---
 src/main/kotlin/VigenereEncryption.kt | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/main/kotlin/VigenereEncryption.kt

diff --git a/src/main/kotlin/VigenereEncryption.kt b/src/main/kotlin/VigenereEncryption.kt
new file mode 100644
index 0000000..25409c5
--- /dev/null
+++ b/src/main/kotlin/VigenereEncryption.kt
@@ -0,0 +1,24 @@
+fun vigenere(text: String, key: String, encrypt: Boolean = true): String {
+    val t = if (encrypt) text.toUpperCase() else text
+    val sb = StringBuilder()
+    var ki = 0
+    for (c in t) {
+        if (c !in 'A'..'Z') continue
+        val ci = if (encrypt)
+            (c.toInt() + key[ki].toInt() - 130) % 26
+        else
+            (c.toInt() - key[ki].toInt() +  26) % 26
+        sb.append((ci + 65).toChar())
+        ki = (ki + 1) % key.length
+    }
+    return sb.toString()
+}
+
+fun main(args: Array<String>) {
+    val key = "LEMON"
+    val text = "ATTACKATDAWN"
+    val encoded = vigenere(text, key)
+    println(encoded)
+    val decoded = vigenere(encoded, key, false)
+    println(decoded)
+}
\ No newline at end of file

From 1cf70a630b3dccdcf886e81ba9869a7def576774 Mon Sep 17 00:00:00 2001
From: Aishwarya0601 <69068161+Aishwarya0601@users.noreply.github.com>
Date: Tue, 16 Nov 2021 00:46:15 +0530
Subject: [PATCH 2/4] Add folder for encyrption algorithms

---
 src/main/kotlin/{ => Encryption}/VigenereEncryption.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename src/main/kotlin/{ => Encryption}/VigenereEncryption.kt (96%)

diff --git a/src/main/kotlin/VigenereEncryption.kt b/src/main/kotlin/Encryption/VigenereEncryption.kt
similarity index 96%
rename from src/main/kotlin/VigenereEncryption.kt
rename to src/main/kotlin/Encryption/VigenereEncryption.kt
index 25409c5..5768646 100644
--- a/src/main/kotlin/VigenereEncryption.kt
+++ b/src/main/kotlin/Encryption/VigenereEncryption.kt
@@ -21,4 +21,4 @@ fun main(args: Array<String>) {
     println(encoded)
     val decoded = vigenere(encoded, key, false)
     println(decoded)
-}
\ No newline at end of file
+}

From 18ff7d44dc7940a548d01c62ba5c81f844858f0f Mon Sep 17 00:00:00 2001
From: Aishwarya0601 <69068161+Aishwarya0601@users.noreply.github.com>
Date: Tue, 16 Nov 2021 00:47:22 +0530
Subject: [PATCH 3/4] Add test cases for Vigenere Encryption

---
 src/test/kotlin/VigEncTest.kt | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/test/kotlin/VigEncTest.kt

diff --git a/src/test/kotlin/VigEncTest.kt b/src/test/kotlin/VigEncTest.kt
new file mode 100644
index 0000000..c6fab80
--- /dev/null
+++ b/src/test/kotlin/VigEncTest.kt
@@ -0,0 +1,29 @@
+import org.junit.Test
+import java.util.*
+
+class VigEncTest {
+    @Test
+    fun testWithAttackAtDawnString() {
+        val secretText = "ATTACKATDAWN"
+        val key = "LEMON"
+        val encoded = vigenere(secretText, key)
+        assert(vigenere(encoded, key, false)==secretText)
+
+    }
+    @Test
+    fun testWithIntellIjString() {
+        val secretText = "INTELLIJJIDEA"
+        val key = "CIPHER"
+        val encoded = vigenere(secretText, key)
+        assert(vigenere(encoded, key, false)==secretText)
+
+    }
+    @Test
+    fun testWithAlgorithmjString() {
+        val secretText = "ALGORITHMREPO"
+        val key = "LEMON"
+        val encoded = vigenere(secretText, key)
+        assert(vigenere(encoded, key, false)==secretText)
+
+    }
+}
\ No newline at end of file

From 572d2ff5ce7c7b1528a1850c449ecb7df689ab13 Mon Sep 17 00:00:00 2001
From: Aishwarya0601 <69068161+Aishwarya0601@users.noreply.github.com>
Date: Tue, 16 Nov 2021 00:49:14 +0530
Subject: [PATCH 4/4] Add folder for test cases of Encryption algorithms

---
 src/test/kotlin/{ => Encryption}/VigEncTest.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename src/test/kotlin/{ => Encryption}/VigEncTest.kt (95%)

diff --git a/src/test/kotlin/VigEncTest.kt b/src/test/kotlin/Encryption/VigEncTest.kt
similarity index 95%
rename from src/test/kotlin/VigEncTest.kt
rename to src/test/kotlin/Encryption/VigEncTest.kt
index c6fab80..8ef5b04 100644
--- a/src/test/kotlin/VigEncTest.kt
+++ b/src/test/kotlin/Encryption/VigEncTest.kt
@@ -26,4 +26,4 @@ class VigEncTest {
         assert(vigenere(encoded, key, false)==secretText)
 
     }
-}
\ No newline at end of file
+}