Merge pull request #15 from D-ENCODER/dev

Polybius Cipher encryption and decryption algorithms added

README.md

@@ -117,4 +117,15 @@ from kryptor.blowfish_cipher import BlowfishCipher
 obj = BlowfishCipher()
 print(obj.encrypt(1684)) # returns 8301200985422371632
 print(obj.decrypt(8301200985422371632)) # returns 1684
+```
+### POLYBIUS CIPHER 
+
+---
+
+```python
+from kryptor.polybius_cipher import PolybiusCipher
+
+obj = PolybiusCipher()
+print(obj.encrypt("I am Dencoder")) # returns 24 1132 1415331334141542
+print(obj.decrypt("24 1132 1415331334141542")) # returns i am dencoder
 ```

pyproject.toml

@@ -3,7 +3,7 @@ requires = ["setuptools>=61.0"]
 build-backend = "setuptools.build_meta"
 [project]
 name = "kryptor"
-version = "0.4.0"
+version = "0.5.0"
 authors = [
   { name="Het Joshi (DENCODER)", email="[email protected]" },
 ]

src/kryptor.egg-info/PKG-INFO

@@ -1,6 +1,6 @@
 Metadata-Version: 2.1
 Name: kryptor
-Version: 0.4.0
+Version: 0.5.0
 Summary: Encrypt and Decrypt data with famous cryptography techniques
 Author-email: "Het Joshi (DENCODER)" <[email protected]>
 License:                     GNU GENERAL PUBLIC LICENSE
@@ -796,7 +796,7 @@ obj = VernamCipher()
 print(obj.encrypt("I am Dencoder", "Python Coder")) # returns xyfksaecgii
 print(obj.decrypt("xyfksaecgii", "Python Coder")) # returns iamdencoder
 ```
-# BLOWFISH CIPHER
+### BLOWFISH CIPHER
 
 ---
 
@@ -807,3 +807,14 @@ obj = BlowfishCipher()
 print(obj.encrypt(1684)) # returns 8301200985422371632
 print(obj.decrypt(8301200985422371632)) # returns 1684
 ```
+### POLYBIUS CIPHER 
+
+---
+
+```python
+from kryptor.polybius_cipher import PolybiusCipher
+
+obj = PolybiusCipher()
+print(obj.encrypt("I am Dencoder")) # returns 24 1132 1415331334141542
+print(obj.decrypt("24 1132 1415331334141542")) # returns i am dencoder
+```

src/kryptor.egg-info/SOURCES.txt

@@ -9,6 +9,7 @@ src/kryptor/hill_cipher.py
 src/kryptor/img_steganography.py
 src/kryptor/morse.py
 src/kryptor/playfair_cipher.py
+src/kryptor/polybius_cipher.py
 src/kryptor/rail_fence.py
 src/kryptor/vernam_cipher.py
 src/kryptor/vigenere_cipher.py

src/kryptor/polybius_cipher.py

@@ -0,0 +1,55 @@
+# Date    : 08/10/22 7:45 pm
+# Author  : dencoder ([email protected])
+# GitHub    : (https://github.com/D-ENCODER)
+# Twitter    : (https://twitter.com/Hetjoshi1684)
+# Version : 1.0.0
+import numpy as np
+
+
+class PolybiusCipher:
+    def __init__(self):
+        SQUARE = [
+            ["a", "b", "c", "d", "e"],
+            ["f", "g", "h", "i", "k"],
+            ["l", "m", "n", "o", "p"],
+            ["q", "r", "s", "t", "u"],
+            ["v", "w", "x", "y", "z"],
+        ]
+        self.SQUARE = np.array(SQUARE)
+        self._plaintext = ""
+        self._ciphertext = ""
+
+    def _letter_to_numbers(self, letter):
+        index1, index2 = np.where(self.SQUARE == letter)
+        indexes = np.concatenate([index1 + 1, index2 + 1])
+        return indexes
+
+    def _numbers_to_letter(self, index1: int, index2: int) -> str:
+        return self.SQUARE[index1 - 1, index2 - 1]
+
+    def encrypt(self, plaintext):
+        self._plaintext = plaintext.replace("j", "i").lower()
+        self._ciphertext = ""
+        for letter_index in range(len(self._plaintext)):
+            if self._plaintext[letter_index] != " ":
+                numbers = self._letter_to_numbers(self._plaintext[letter_index])
+                self._ciphertext = self._ciphertext + str(numbers[0]) + str(numbers[1])
+            elif self._plaintext[letter_index] == " ":
+                self._ciphertext = self._ciphertext + " "
+
+        return self._ciphertext
+
+    def decrypt(self, ciphertext):
+        self._ciphertext = ciphertext.replace(" ", "  ")
+        self._plaintext = ""
+        for numbers_index in range(int(len(self._ciphertext) / 2)):
+            if self._ciphertext[numbers_index * 2] != " ":
+                index1 = self._ciphertext[numbers_index * 2]
+                index2 = self._ciphertext[numbers_index * 2 + 1]
+
+                letter = self._numbers_to_letter(int(index1), int(index2))
+                self._plaintext = self._plaintext + letter
+            elif self._ciphertext[numbers_index * 2] == " ":
+                self._plaintext = self._plaintext + " "
+
+        return self._plaintext