From 8c63cedfa47b6c8cd5183eb8cfd96faa477f6e26 Mon Sep 17 00:00:00 2001
From: David Huh <38101884+qt1337@users.noreply.github.com>
Date: Fri, 15 Oct 2021 13:29:56 +0200
Subject: [PATCH] :construction: WIP

---
 Verschiebe-Chiffre.py | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Verschiebe-Chiffre.py

diff --git a/Verschiebe-Chiffre.py b/Verschiebe-Chiffre.py
new file mode 100644
index 0000000..1dfbfad
--- /dev/null
+++ b/Verschiebe-Chiffre.py
@@ -0,0 +1,33 @@
+def encrypt_text(cleartext: str = 'Bitcoin', incrementation: int = 13):
+    encrypted_text = ''
+
+    for char in cleartext:
+        encrypted_text += increment_char(char, incrementation)
+
+    return encrypted_text
+
+
+def increment_char(char, incrementation: int = 1):
+    # converting character to byte
+    char_in_bytes = bytes(char, 'utf-8')[0]
+    if char_in_bytes + incrementation >= 91 and char_in_bytes < 91 \
+            or char_in_bytes + incrementation >= 123:  # z -> 122 | 90 -> Z so go backwards
+        new_char_in_bytes = bytes([char_in_bytes - (26 - incrementation)])
+    else:
+        new_char_in_bytes = bytes([char_in_bytes + incrementation])
+
+    return str(new_char_in_bytes)[2]
+
+
+def decrypt_text(encrypted_text: str = 'Ovgpbva', incrementation: int = 13):
+    cleartext = ''
+
+    for char in encrypted_text:
+        cleartext += increment_char(char, 26 - incrementation)
+
+    return cleartext
+
+
+if __name__ == '__main__':
+    print(encrypt_text())
+    print(decrypt_text())