https://charlesreid1.com/w/index.php?action=history&feed=atom&title=RSA 2026-06-20T15:54:03Z Revision history for this page on the wiki MediaWiki 1.39.12 https://charlesreid1.com/w/index.php?title=RSA&diff=30702&oldid=prev 2026-06-20T03:48:19Z

<p>Create RSA page with Python key generation, encryption, decryption, and signing examples (via create-page on MediaWiki MCP Server)</p> <p><b>New page</b></p><div>&lt;![CDATA[from Crypto.PublicKey import RSA<br /> from Crypto.Signature import pkcs1_15<br /> from Crypto.Hash import SHA256<br /> from Crypto.Cipher import PKCS1_OAEP<br /> <br /> <br /> def generate_keys(bits=2048):<br /> key_pair = RSA.generate(bits)<br /> return key_pair.export_key(), key_pair.publickey().export_key()<br /> <br /> <br /> def encrypt(plaintext, public_key_pem):<br /> recipient_key = RSA.import_key(public_key_pem)<br /> cipher_rsa = PKCS1_OAEP.new(recipient_key)<br /> return cipher_rsa.encrypt(plaintext.encode(&#039;utf-8&#039;))<br /> <br /> <br /> def decrypt(ciphertext, private_key_pem):<br /> private_key = RSA.import_key(private_key_pem)<br /> cipher_rsa = PKCS1_OAEP.new(private_key)<br /> return cipher_rsa.decrypt(ciphertext).decode(&#039;utf-8&#039;)<br /> <br /> <br /> def sign(message, private_key_pem):<br /> private_key = RSA.import_key(private_key_pem)<br /> h = SHA256.new(message.encode(&#039;utf-8&#039;))<br /> return pkcs1_15.new(private_key).sign(h)<br /> <br /> <br /> def verify(message, signature, public_key_pem):<br /> public_key = RSA.import_key(public_key_pem)<br /> h = SHA256.new(message.encode(&#039;utf-8&#039;))<br /> try:<br /> pkcs1_15.new(public_key).verify(h, signature)<br /> return True<br /> except (ValueError, TypeError):<br /> return False<br /> <br /> <br /> if __name__ == &#039;__main__&#039;:<br /> private_key, public_key = generate_keys()<br /> <br /> text = &quot;This is a test&quot;<br /> <br /> ciphertext = encrypt(text, public_key)<br /> plaintext = decrypt(ciphertext, private_key)<br /> print(&quot;Plaintext was &#039;%s&#039;&quot; % plaintext)<br /> <br /> signature = sign(text, private_key)<br /> valid = verify(text, signature, public_key)<br /> print(&quot;Signature valid: %s&quot; % valid)<br /> <br /> tampered = verify(&quot;Tampered message&quot;, signature, public_key)<br /> print(&quot;Tampered signature valid: %s&quot; % tampered)<br /> <br /> https://www.reddit.com/r/cryptography/comments/4yu7mh/code_review_of_aes_implementation_in_python/<br /> <br /> {{CryptoFlag}}<br /> <br /> {{PythonFlag}}<br /> <br /> [[Category:Security]]<br /> [[Category:Encryption]]<br /> [[Category:Asymmetric Cryptography]]</div>

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