init

part1/alice.py

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+import hmac
+import hashlib
+
+import secrets
+
+# Generate and write shared key
+
+shared_secret: bytes = secrets.token_bytes(16)
+
+with open('k', 'wb') as file:
+    file.write(shared_secret)
+
+# Take in message and compute hmac
+m = input("Message: ").encode()
+
+hmac_object: hmac.HMAC = hmac.new(shared_secret, m, hashlib.sha256)
+m_hash = hmac_object.digest()
+
+print(f'HMAC: {m_hash}')
+
+# Write hmac digest and message
+
+with open('mactext', 'wb') as file:
+    file.write(m + m_hash)
+
+
+
+