From a6230821f962da068e8c52b14f18e85afcfcdbbb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Phillip=20K=C3=BChne?= <phillipkhne@gmail.com>
Date: Mon, 29 Oct 2018 22:05:49 +0100
Subject: [PATCH] first commit

---
 .vscode/settings.json |  3 ++
 main.py               | 68 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 .vscode/settings.json
 create mode 100755 main.py

diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..615aafb
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "python.pythonPath": "/usr/bin/python3"
+}
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100755
index 0000000..13ac3c2
--- /dev/null
+++ b/main.py
@@ -0,0 +1,68 @@
+#!/usr/bin/python3
+import sys, getopt
+
+def encrypt(string,key):
+    lowerstr=string.lower()
+    print("Encrypting "+lowerstr+" with key "+key)
+    strnums = []
+    keynums = []
+    resultnums = []
+    resultstring = ""
+    for c in lowerstr:
+        strnums.append(ord(c)-97)
+    print(strnums)
+    for c in key:
+        keynums.append(ord(c)-97)
+    print(keynums)
+    keypointer=0
+    for n in strnums:
+        resultnums.append((n+keynums[keypointer])%26)
+        keypointer = (keypointer+1) % (len(key))
+    print(resultnums)
+    for c in resultnums:
+        resultstring = resultstring+chr(c+97)
+    print(resultstring)
+
+def decrypt(string,key):
+    lowerstr=string.lower()
+    print("Decrypting "+lowerstr+" with key "+key)
+    strnums = []
+    keynums = []
+    resultnums = []
+    resultstring = ""
+    for c in lowerstr:
+        strnums.append(ord(c)-97)
+    print(strnums)
+    for c in key:
+        keynums.append(ord(c)-97)
+    print(keynums)
+    keypointer=0
+    for n in strnums:
+        resultnums.append((n-keynums[keypointer])%26)
+        keypointer = (keypointer+1) % (len(key))
+    print(resultnums)
+    for c in resultnums:
+        resultstring = resultstring+chr(c+97)
+    print(resultstring)
+
+def main(argv):
+    key = ""
+    try:
+        opts, args = getopt.getopt(argv,"hk:e:d:",["key=","encrypt=","decrypt="])
+    except getopt.GetoptError:
+        print('test.py -k <key> -e <plain text>')
+        print('test.py -k <key> -d <encrypted text>')
+        sys.exit(2)
+    for opt, arg in opts:
+        if opt == '-h':
+            print('test.py -k <key> -e <plain text>')
+            print('test.py -k <key> -d <encrypted text>')
+            sys.exit()
+        elif opt in ("-k", "--key"):
+            key = arg
+        elif opt in ("-e", "--encrypt"):
+            encrypt(arg,key)
+        elif opt in ("-d", "--decrypt"):
+            decrypt(arg,key)
+if __name__ == '__main__':
+    main(sys.argv[1:])
\ No newline at end of file