first two challenges solved

data/01.txt

@@ -0,0 +1 @@
+49276d206b696c6c696e6720796f757220627261696e206c696b65206120706f69736f6e6f7573206d757368726f6f6d

data/02.txt

@@ -0,0 +1,2 @@
+1c0111001f010100061a024b53535009181c
+686974207468652062756c6c277320657965

data/03.txt

@@ -0,0 +1 @@
+1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "cryptopals"
-version = "0.0.1"
+version = "0.1"
 authors = [
     { name="Joshua Flores", email="josh@heavyguys.net"},
 ]

setup.cfg

@@ -0,0 +1,24 @@
+[metadata]
+name = cryptopals
+version = 0.1
+author = Joshua Flores
+author_email = josh@heavyguys.net
+description = Cryptopals Solutions
+long_description = file: README.md, LICENSE.txt
+long_description_content_type = text/markdown
+url = https://git.heavyguys.net/Josh/cryptopals
+project_urls =
+    repository = https://git.heavyguys.net/Josh/cryptopals.git
+classifiers =
+    Programming Language :: Python :: 3
+    License :: OSI Approved :: MIT License
+    Operating System :: OS Independent
+
+[options]
+package_dir =
+    = src
+packages = find:
+python_requires = >=3.9
+
+[options.packages.find]
+where = src

src/cryptopals/cryptlib.py

@@ -0,0 +1,14 @@
+import base64
+
+
+# this function takes a string representing hex, converts to bytes, and re-encodes to base64
+def hex_to_base64(hex_string):
+    byte_array = bytearray.fromhex(hex_string)
+    base64_value = base64.b64encode(byte_array)
+    return base64_value
+
+# this function takes two hex strings, converts them to bytes, and xor's them
+def byte_xor(bs1, bs2):
+    byte_array1 = int(bs1,16)
+    byte_array2 = int(bs2,16)
+    return byte_array1 ^ byte_array2

src/cryptopals/helper.py

@@ -0,0 +1,5 @@
+def read_file(filepath):
+    with open(filepath, "r") as file:
+        content = file.read()
+    return content
+

tests/01.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+
+import os, sys
+
+module_dir = os.path.relpath('../src/cryptopals')
+sys.path.insert(0, module_dir)
+
+import helper, cryptlib
+
+def main():
+    hex_string = helper.read_file("../data/01.txt") 
+    solution = cryptlib.hex_to_base64(hex_string)
+    print(solution.decode())
+
+
+if __name__ == '__main__':
+    main()

tests/02.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+
+import os, sys
+
+module_dir = os.path.relpath('../src/cryptopals')
+sys.path.insert(0, module_dir)
+
+import helper, cryptlib
+
+def main():
+    content = helper.read_file("../data/02.txt")
+    hexstring_list = content.splitlines()
+    solution = cryptlib.byte_xor(hexstring_list[0], hexstring_list[1])
+    print(hex(solution)[2:])
+
+if __name__ == '__main__':
+    main()

tests/template.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+
+import os, sys
+
+module_dir = os.path.relpath('../src/cryptopals')
+sys.path.insert(0, module_dir)
+
+import helper, cryptlib
+
+def main():
+    pass
+
+
+if __name__ == '__main__':
+    main()