mtoshi / pynacl-demo

PyNaCl SealedBox encrypt/decrypt demo

PyNaCl SealedBox encrypt/decrypt demo

• NaCl http://nacl.cr.yp.to/index.html
• PyNaCl https://pypi.org/project/PyNaCl/
• PyNaCl Github https://github.com/pyca/pynacl
• PyNaCl readthedocs https://pynacl.readthedocs.io/en/stable/

Demo installation

• Create environment and install packages.

$ python3.7 -m venv /tmp/pynacl-demo && source /tmp/pynacl-demo/bin/activate
$ git clone [e-mail]:mtoshi/pynacl-demo.git
$ cd pynacl-demo
$ pip install setuptools --upgrade && pip install pip --upgrade
$ pip install -r requirements.txt

SealedBox encrypt/decrypt sample

• Run sample code.

$ python sealedbox_sample.py

----------------------------------------------------------------------------------------------------
KEY and MESSAGE
----------------------------------------------------------------------------------------------------
PRIKEY: b'\xd7\x93j\xdc\x1e:\xe5i\xad\xab\t\xeb\x95<\xb7\xce\x03\xab/\x08]\xd9\x9f\xcf\xea\xa2\xbaC\xeb\x7f\x8c.'
PRIKEY(BASE64): 15Nq3B465WmtqwnrlTy3zgOrLwhd2Z/P6qK6Q+t/jC4=
PUBKEY: b'\xa2%\x0c\x879\xba\x0fL\x958Qdk\x1e\xdbO*\x80\xe5T}\x8d\x10S\xa3\xc4\xa4\xea\xf7\xd7Pu'
PUBKEY(BASE64): oiUMhzm6D0yVOFFkax7bTyqA5VR9jRBTo8Sk6vfXUHU=
MESSAGE: abcdefg1234
----------------------------------------------------------------------------------------------------
ENCRYPT with public key
----------------------------------------------------------------------------------------------------
ENCRYPTED MESSAGE: b'\xf4\xca\x7f\xe5k\x82\xee\x8e\x8aw3\xe4\x9eA\xb4\xa13\xedW\xb7\xe9&\xb9\xbb\x7fp\xae\xb2\x9f&\n\x00%\xae\xaaMVj\x86\xc7"\xec\x8dN\x18\xe4/\xc2M\xd6R\xb0g/\x05C\x90\x8aB'
ENCRYPTED MESSAGE(BASE64): 9Mp/5WuC7o6KdzPknkG0oTPtV7fpJrm7f3Cusp8mCgAlrqpNVmqGxyLsjU4Y5C/CTdZSsGcvBUOQikI=
----------------------------------------------------------------------------------------------------
DECRYPT with private key
----------------------------------------------------------------------------------------------------
DECRYPTED MESSAGE: abcdefg1234

• Sample code.

from nacl.public import PrivateKey
from nacl.public import SealedBox
from nacl.encoding import Base64Encoder


prikey = PrivateKey.generate()
pubkey = prikey.public_key

message = 'abcdefg1234'
encoding = 'utf-8'

box = SealedBox(pubkey)
encrypted = box.encrypt(message.encode(encoding=encoding))
print(encrypted)

box = SealedBox(prikey)
decrypted = box.decrypt(encrypted).decode(encoding=encoding)
print(decrypted)