Use at your own risk. I compiled this for usage in a personal project where it worked fine.

• Available in the python2 folder
• Python Cryptography Toolkit (pycrypto) compiled and packaged for AWS Lambda. Because that is a pain to do.

• Available in the python3 folder
• Since support for python2 is ending at the end of 2020 and pycrypto is no longer supported, this version uses:
  • Python 3.7.4
  • pip 9.0.3 from /usr/lib/python3.7/site-packages (python 3.7)
  • Amazon Linux 2 Linux 4.14.158-129.185.amzn2.x86_64 #1 SMP Tue Dec 24 03:15:32 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
  • pycryptodome

Simply download and include the correct Crypto folder in your project, zip and upload it to Lambda.

Directory structure:

* myproject
  - Crypto/
  - lambda_handler.py

lambda_handler.py:

from __future__ import print_function

from Crypto.Hash import SHA256


def lambda_handler(event, context):
    hash = SHA256.new()
    hash.update('message')
    digest = hash.digest()
    print(len(digest))
    print(repr(digest))
    return

Log output:

START RequestId: 17e0f272-9b91-11e6-bf2d-f756ae83795f Version: $LATEST
32
'\xabS\n\x13\xe4Y\x14\x98+y\xf9\xb7\xe3\xfb\xa9\x94\xcf\xd1\xf3\xfb"\xf7\x1c\xea\x1a\xfb\xf0+F\x0cm\x1d'
END RequestId: 17e0f272-9b91-11e6-bf2d-f756ae83795f
REPORT RequestId: 17e0f272-9b91-11e6-bf2d-f756ae83795f	Duration: 0.28 ms	Billed Duration: 100 ms 	Memory Size: 128 MB	Max Memory Used: 14 MB